Kulekhani I Hydropower Station

MESSAGE FROM THE MANAGING DIRECTOR

I would like to express my sincere greetings to the Generation Directorate on the publication of its 12th edition of NEA “Generation Directorate Magazine” on the occasion of the 35th anniversary of Nepal Electricity Authority. I believe the precious data presented herein will be useful to the NEA stakeholders as well as the general public.

The total installed capacity of the NEA owned power plants is 626.70 MW (20 hydro and 2 thermal) out of total 1332.86 MW in INPS. The annual generation from these power plants is 3011.43 GWh, which is 50.09% of the total energy generation in Nepal.

Upper Trishuli 3A (60 MW) was inaugurated by Rt. Hon’ble Prime Minister KP Sharma Oli on 18 Nov, 2019. The long awaited cascade type Hydro power project, Kulekhani-III (14 MW) also started generation from 11 Oct, 2019. The taking over of this plant is still on hold due to the Covid-19 pandemic as well as a few other liabilities that need to be accomplished by the Contractor. Major rehabilitation or overhauling works were carried out in Kaligandaki A (including SCADA/ Control system upgradation), Middle Marsyangdi, Marsyangdi, Kulekhani- I & II, Sunkoshi, Modi, Trishuli, Devighat and Puwakhola HPS, even during the lockdown imposed by the government and the continued pandemic. This has ultimately resulted in minimizing generation outage due to breakdowns. These regular and timely maintenance has made Generation Directorate capable of supplying reliable and continuous energy to national grid.

Finally, I’m thankful to all the employees working in the power plants, their plant managers and the entire team in Generation Directorate for putting in all the hard work to achieve the desired result. I would also like to thank the publication team who have made the publication of this magazine successful in a very short time frame.

...... Kul Man Ghising Managing Director MESSAGE FROM THE DEPUTY MANAGING DIRECTOR

I’m so glad that NEA Generation Directorate is publishing its 12th edition of NEA GENERATION magazine on the occasion of our 35th annual day of Nepal Electricity Authority (NEA). I believe, this magazine will be able to highlight the actual scenario of NEA owned power plants/projects and its related activities to the public.

The directorate team has tried its best for the maximum electricity generation with periodic and scheduled maintenance activities, along with rehabilitation of aged power plant components and structures. “Prevention is better than Cure” has always been considered a motto for best handling of power plants and equipments. To cope up this slogan, we have planned and done the maintenance activities of power plants with minimal generation loss by doing unit and plant shutdown in dry season with minimum duration and utilizing maximum effort of available technical manpower and resources.

60 MW Upper Trishuli 3A HEP which had started test generation last year, has been inaugurated by Rt. Honorable Prime Minister KP Sharma Oli on 18 Nov, 2019. 14 MW Kulekhani-3, a cascade scheme of Kulekhani Storage Power Plant (92 MW) is also generating power, though in testing mode, and is connected to national grid from 11 Oct, 2019. With this, there are no any hydropower projects in pipeline, to be developed directly, by Generation Directorate.

I’m very proud and thankful to the employees under Generation Directorate who have worked, being 24 hour available, in spite of all adverse conditions and situations like; rain, flood, festivals, weekend, holidays or Covid-19 pandemic situation & lockdown everywhere in power plants or in directorate/department office. With this dedication and planned/scheduled maintenance, NEA power plants have generated 18.51% more annual energy than last year. Kulekhani storage hydropower plant has generated maximum energy after 15 years (since 2061/62). Kaligandaki ‘A’ has undergone upgradation of plant Control / SCADA system which has solved long and chronic problem of control, protection and operation. 85 years old 640 kW Sundarijal Hydroelectric Plant is being upgraded to 970 kW with all new Electro-Mechanical components. 53 years old Trishuli Hydroelectric Plant is also in the process of rehabilitation with replacement of all Electro-Mechanical components after ICB contract. Other problematic power plants are also in the phase of rehabilitation.

At last but not the least, I would like to express my sincere gratitude to the NEA Board, Chairman and Managing Director for their valuable guidance, support and boosting the morale of every employees and Operation & Maintenance team of power plants.

...... Madan Timsina Directorate Chief CONTENTS

Executives 1 Station Chiefs 2 Organizational Structure of NEA 4 Corporate Structure of Generation Directorate 5 Generation Directorate 7 Large Generation Operation and Maintenance Department 13 Kaligandaki ‘A’ Hydropower Station 14 Middle Marsyangdi Hydropower Station 22 Marsyangdi Hydropower Station 26 Upper Trisuli 3A Hydropower Station 31 Kulekhani I Hydropower Station 36 Kulekhani II Hydropower Station 42 Chameliya Hydropower Station 47 Multi- Fuel Power Station 52 Medium Generation Operation And Maintenance Department 56 Trisuli Hydropower Station 57 Devighat Hydropower Station 61 Gandak Hydropower Station 66 Modi Khola Hydropower Station 71 Sunkoshi Hydropower Station 75 Puwa Khola Hydropower Station 79 Chatara Hydropower Station 83 Panauti Hydropower Station 86 Seti Hydropower Station 90 Fewa Hydropower Station 93 Sundarijal Hydropower Station 96 Pharping Hydropower Station 99 Hetauda Diesel Power Station 101 Generation Development Department 104 Upper Trishuli 3A Hydroelectric Project 105 Kulekhani III Hydroelectric Project 107 Tinau-Sundarijal Hydropower Station Rehabilitation Project 108 Technical Support Department 109 Front Cover Image : Kaligandaki “A” Damsite Back Cover Image : Reservoir of Pharping Power Station

Design & Print: Jaya Laligurans Investment & Trading Company Pvt. Ltd. Address : Lalitpur-3, Hariharbhawan Phone : 01-5010711, 5010610 Email : [email protected]

NEPAL ELECTRICITY AUTHORITY 1 Generation Directorate 2076/2077 12th Issue, 2077

EXECUTIVES

Mr. Madan Timsina Mr. Chandra Shekhar Chaudhary Mr. Fanendra Raj Joshi Chief, Generation Directorate Director Director Large Generation O&M Department Upper Trishuli ‘3A’ Hydropower Project

Mr. Ajay Kumar Dahal Mr. Shubash Kumar Mishra Mr. Ramesh Man Shrestha Director, Medium Generation O&M Department/ Director Director Chameliya Hydropower Project Kulekhani III Hydropower Project Generation Development Department

Mr. Aniruddha Paudel Mr. Bashanta Kumar Dhungana Mrs. Indira Devi Dahal Chief Deputy Director Deputy Director Technical Support Department Finance Division Admisistration Division

NEPAL ELECTRICITY AUTHORITY 1 Generation Directorate 2076/2077 12th Issue, 2077

STATION CHIEFS

Mr. Pashupati Raj Gautam Mr. Shiva Kumar Shah Mr. Ram Kumar Yadav Kaligandaki ‘A’ HPS Middle Marsyangdi HPS Marsyangdi HPS

Mr. Suresh Raut Mr. Dhirendra Chaudhary Mr. Avash Ojha Upper Trishuli ‘3A’ HPS Kulekhani-I HPS Kulekhani-II HPS

Mr. Puran Sob Mr. Babu Raja Maharjan Mr. Suraj Dahal Chameliya HPS Trishuli HPS Devighat HPS

Mr. Kapil Dev Manjan Mr. Pawan Basnyat Mr. Pradeep Singh Gandak HPS Modi Khola HPS Kulekhani-III HPS (Proposed)

2 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 3 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077

Mr. Sunil K. Chaturbedi Mr. Gir Bahadur K.C. Mr. Prahlad Raut Multifuel PS Sunkoshi HPS Puwa Khola HPS

Mr. Surendra Karki Mr. Binod Prasad Pandey Mr. Haris Chandra Dhital Hetauda Diesel PS Chatara HPS Panauti HPS

Mr. Shiv Kumar Thapa Mr. Mohammad Safid Mr. Shyam Krishna Basnet Seti Fewa HPS Sundarijal HPS Pharping PS

NEPAL ELECTRICITY AUTHORITY 3 Generation Directorate 2076/2077 12th Issue, 2077 A 12 - Acc. Acc. 11 11 - - Account L L Finance Department Department Directorate DMD L DMD Corporate Finance A 12 Adm Adm - Adm. Adm. Legal 11 11 11 11 - - - - L L L L Department Department Department Department Recruitment General Service Directorate Human Resource DMD L DMD Administration T T 12 - 11 - L Department Directorate DMD L DMD Project Management Project Mgmt. Mgmt. Project T Company 12 Directorate DMDL - Acc. 11 Monitoring L- NEASubsidiary Audit Committee Audit Internal Audit Department Department Internal Audit T Section Social Concrete T 12 T - Acc Adm. Adm 11 9 11 9 Electrical - - 11 L L L- - Division L- 10 Laboratory Department L Finance Section L- Directorate DMD L DMD Study Department Study Project Development NEA Training Centre Training NEA Administration Soil Rock and Rock Soil Environment & & Environment T Electromechanical Design Engineering Services 11 - L & & Reduction Department Department Reduction Misc. T T T T Energy Efficiency Loss and Efficiency Energy -12 T -12 Planning 11 11 11 11 - - Adm/ L Monitoring Monitoring L L- L- Directorate 11 Department Department Department L- System System Planning NEA Board Economic Analysis Economic DMD L DMD Corporate Monitoring Department Monitoring Information Technology Power Trade Department & IT Managing Director Planning, MIS MIS T & & Electrical T T T 12 Acc , Adm - 11 11 11 T - 10 - - 10 L-9 - - L L L L L 11 Department Department Department Grid Operation Operation Grid L- Finance Division Finance Directorate S Secretariat, S System OperationSystem DMD L DMD Transmision Monitoring Grid Development Development Grid Section, Administration Division Administration MD' Services; A = Administration Services:Adm = Administration Group: ORGANIZATIONAL STRUCTURE OF NEPAL ELECTRYCITYAUTHORITY STRUCTURE OF NEPAL ORGANIZATIONAL MIS MIS T & & Computer T T T T Acc 12 , Adm - 9 11 11 11 - 11 T = Technical 10 Note : Note Group Acc=Account 10 L L- - L- L- L- L L- Department Finance Division Finance Monitoring Generation Generation Directorate Directorate DMD L DMD Maintenance Department Maintenance Maintenance Department, Generation Development Section, & Administration Division Administration & Large Generation Operation Medium Generation Operation Operation Generation Medium Technical Support Department Department Support Technical Ele. Ele. (T) (T) (T) (T) (T) (T) (T) 3 10 10 11 11 11 11 11 11 11 No. Butwal Surkhet Province Division Janakpur Level Level Biratnagar Provincial Office, Provincial Office, Level Provincial Office, Kathmandu Level Provincial Office, Level Level Level Level Level T Office, Hetauda Office Nepalgunj 3 Province Division 5 2 1 Office, Pokhara Sudur Pashchim Gandaki Provincial

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4 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 5 Generation Directorate 2076/2077 Generation Directorate 2076/2077

12th Issue, 2077

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NEPAL ELECTRICITY AUTHORITY 5 Generation Directorate 2076/2077 NEPAL ELECTRICITY AUTHORITY 7 Generation Directorate 2076/2077 12th Issue, 2077

GENERATION DIRECTORATE

BRIEF OVERVIEW MAJOR ACTIVITIES

Generation directorate, headed by Deputy Managing This year two (2) ongoing projects i.e. Upper Trishuli Director is responsible for the construction of 3A Hydroelectric Project (60 MW) and Kulekhani III the new power generation projects together Hydroelectric Project (14 MW) have been completed with optimum operation and maintenance of the and have started generating power continuously. hydropower stations owned by Nepal Electricity The Upper Trishuli 3A Hydroelectric Project has Authority (NEA). Currently there are twenty (20) already been transformed as hydropower station generating Hydropower Stations and two (2) while Kulekhani III Hydroelectric Project is still in Thermal Power Stations under this directorate and the phase of test operation. no any new under construction hydropower projects directly under this directorate. Hence, ‘Generation of The Upper Trishuli 3A hydroelectric Project was energy by optimally utilizing the resources available officially inaugurated by Right Honorable Prime while undertaking periodic Overhauling, major Minister, K.P. Sharma Oli on 18th November, 2019 corrective and preventive Maintenance works, and (B.S. 2076/08/02) after completion of trial operation Rehabilitation Projects of the generating Stations’; period starting from Jestha 2, 2076 for one unit and that approximately describes the mission of the from Shrawan 17 for the other one. Generation Directorate. Similarly, Kulekhani III Hydroelectric project has The total installed capacity of Hydropower started generating electricity in test operation phase Stations and Thermal Power Stations under this from its Unit-1 and Unit-2 from 15th Ashoj, 2076 and th directorate now has reached 573.29 MW and 53.41 24 Ashoj, 2076 respectively. MW respectively. This directorate is structured into Heavy rainfall and high flood occurred on third four (4) Departments, two (2) Divisions and one week of Asar, 2077 forced few power stations for (1) Section. The departments under this directorate shutdown. Kaligandaki and Marsyangdi rivers are 1) Large Generation Operation & Maintenance observed highest flood level in the last few years. Department (LGO&MD), 2) Medium Generation Despite this, the whole team under Generation Operation & Maintenance Department (MGO&MD) Directorate has strived to increase total production 3) Technical Support Department (TSD) 4) Generation of energy as compared to previous years. In Development Department (GDD) each headed by a addition, while generating 264.826 GWh energy Director. Further, the directorate is supported by (total generation of all three plants of Kulekhani), two divisions which are 1) Finance Division and Kulekhani reservoir water level raised from 1503.96 2) Administration Division, each headed by a Joint masl (on 2077/03/01) to 1510.5 masl (on 2077/03/31) Director. In addition, a Monitoring and IT Section during 31 days. In this fiscal year, the maximum provides assistance in all the technical works and level of Kulekhani reservoir is recorded as 1527.70 monitors all the Projects and Power Stations under masl (on 2076/06/25). the Generation Directorate.

NEPAL ELECTRICITY AUTHORITY 7 Generation Directorate 2076/2077 12th Issue, 2077

In this fiscal year 2076/77, total energy generation also planned the maintenance of existing De-sanding from the power stations under this directorate basin and construction of new De-sanding basin is 3011.431 GWh as compared to the target of under the rehabilitation project which is currently 3133.67 GWh (excluding the target of Kulekhani III under study phase. Seti HPS has completed the Hydropower station), whereas in the last FY 2075/76, installation of new digital type Governor in the the generation was 2541.116 GWh. Hence, this year’s replacement of existing oil Governor, whereas Fewa generation has achieved 96.1 % of the target and HPS has instigated the complete replacement of its 89.6 % of design generation (3360.83 GWh including age-old Turbine and Generator set of all 4 units; the design generation of Kulekhani III Hydropower including Governor, Excitation system, Control station). The actual energy generation achieved was system and associated Auxiliaries that will provide 18.5% higher as compared to the last year’s energy reliable operation of the power Station in the generation. future. Similarly, Gandak Hydropower Station is undertaking the complete rehabilitation of Electro- Due to reliable Operation and Maintenance practices, mechanical parts and protection components the NEA Hydropower Stations increased generation beginning from FY 2076/77 and is planned to be and eventually contributed to meet the demand of completed by FY 2078/79. In addition, Panauti HPS consumers. The well management of employees and has also planned to install and replace Turbine parts time of the machine overhauling under scheduled in the coming 2 years starting from this fiscal year. maintenance has minimized energy spill of the power stations. As in the previous years the experts’ team was arranged from different power stations for Maintenance and Overhauling. Efficient co- ordination for maintenance scheduling among the stations resulted the improvement of operational practices for getting higher output. This fiscal year, the plant (station) shutdown duration required by Indian irrigation authority for headworks and canal maintenance was continued for Gandak Hydropower Station.

The Generation Directorate has been continuing to work on the repair and maintenance activities, Control Room of Kaligandaki “A” Hydropower Station after periodic overhauling and rehabilitation projects Control System Upgradation under NEA’s own funding and in assistance with Installation of AMR/AMI System for CT Operated Government of Nepal and multilateral agencies energy meters in the Power Stations & Substations, in some cases. Kali Gandaki ‘A’ HPS was under initiated in FY 2075/76, has been continued with the rehabilitation program funded by World Bank (IDA co-ordination of AMI project under DCS Directorate. Credit) and Sundarijal HPS is ongoing rehabilitation Rest of the Electro-mechanical as well as old and and up-gradation work under ADB financing. This nonfunctioning meters in all the HPS are being fiscal year, Kaligandaki ‘A’ Rehabilitation Project replaced simultaneously. Also, HPS Employees has successfully completed the installation of Enhanced Performance Reward (EPR) software Supervisory Control and Data Acquisition (SCADA) has been upgraded and is being used in all the system, while it has planned to undertake Dam power stations from this fiscal year. Centralized left-bank protection, Spillway repair and spare e-attendance is going to be implemented very soon Turbine purchase works. Trishuli HPS has initiated with the co-ordination of IT Department in all the the rehabilitation of Electro-mechanical equipment HPS, with the result that Over Time and Shift duty except Turbines and Generators. In addition, it has schedule will be managed digitally through software.

8 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 9 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077

ADMINISTRATION DIVISION Preserving and record keeping of the Asset management, employee e-attendance, employee Administration division is responsible for the managements, record keeping, lands and physical management of employees under the generation structures management under Generation directorate and concerned offices in coordination Directorate is also performed by this division. Finally, with the central human resource department as per the administration division oversees the operation of the approved positions. With the belief of right man vehicles for offices under this directorate, circulates in right place, this division also transfers or intra- notices as well as information to all the departments group transfers of employees with the approval of and branches of this directorate and assists in Deputy Managing Director and keeps record of the procurement works related to the directorate. employees in offices liable to the directorate. Currently 636 technical and 162 administrative staff, in total 798 staff working under this directorate In order to prepare professionally competent (excluding under-construction projects) while staff, this division manages service-related skill approved positions are 792 for technical and 299 for enhancement trainings for capability accretion of administration in total of 1091 positions. Similarly, employees working in offices under the generation 67 employees are working on under-construction directorate, regularly in national and international hydroelectric projects while the approved positions level. Similarly, it provides suggestions and are 130. assessments to the Deputy Managing Director regarding administrative tasks.

SUMMARY OF EMPLOYEE STATUS UNDER GENERATION DIRECTORATE

Particulars Service Approved Positions Incumbent Deficit Officer level Technical 173 118 55 Asst. level 619 518 101 Technical total 792 636 156 Officer level Administration 44 38 6 Asst. level 255 124 131 Administrative Total 299 162 137 Total (Technical + Administration) 1091 798 293

SUMMARY OF EMPLOYEE STATUS OF UNDER CONSTRUCTION HYDRO ELECTRIC PROJECT

Particulars Approved Positions Incumbent Deficit

Upper Trisuli 3A Hydroelectric project 75 15 60 Kulekhani III Hydroelectric Project 33 36 (Myadi=21) Tinau Sundarijal rehabilitation Project 11 7 4 Chameliya Hydroelectric Project 11 9 2

Note: Presently, deficit of asst. level staffs is fulfilled by contract (of Level 1-3). FINANCE DIVISION role as a liaison office as it receives budget/fund from Corporate Finance Department and disseminate it Finance Division under Generation Directorate, NEA to respective power houses and plant as per their is liable for preparation, implementation and control requisition. Finance division consolidates book of of financial matters for itself as well as for Hydro- account- expenditure, income, assets and liabilities Electric projects and Hydropower Stations. Finance monthly as well as annually and reports the same division keeps account of financial transactions- to the Accounts Department, NEA. It also prepares income, expenditure, assets and liabilities. It plays other financial reports and statements for internal

NEPAL ELECTRICITY AUTHORITY 9 Generation Directorate 2076/2077 12th Issue, 2077 use and also as per the direction of superior body. departments/power stations along with supporting It solely operates as distinct budget center as well documents. as a central body of many budget centers under the generation directorate. ASSET AND INVENTORY MANAGEMENT

ANNUAL BUDGET AND PROGRAM Goods required mainly for the Administrative and Repair & Maintenance works are purchased on the Finance division, generation directorate is responsible basis of immediate requirements by procurement for consolidation and preparation of annual budget unit. The maintenance of stocks, its receipts, and programs for the Projects and Power Stations disbursement (expenses) is performed by ‘store- under the directorate. The preparation begins keeping unit’ under the finance division. Stock with an assessment of the annual budget, capital management consists of customized accounting budget as well as operation and maintenance software by the store unit and further accounting budget, and programs of significance at the central is done with the help of CAIS accounting software. level. The power stations propose annual budget Fixed assets and its semiannual depreciation and program to cover capital investments and calculated on straight line method are maintained operation & maintenance expenditures. Generation with the help of AMS (Asset Management System). directorate subsequently involves the power stations Annually, physical verification is performed to and customizes their needs to produce an annual assure the safety, efficient use status and safekeeping financial plan. The financial plan guides to the of those assets. optimum allocation of available funds to achieve the common goal of the directorate. Generation PROBLEMS AND WAY FORWARD directorate works with the central payment, NEA for Finance division is facing pending settlement of administration of funds to those set programs and transaction since 2046/047. Mainly there are inter their timely disbursements. The finance division also unit accounts (inter branch transaction), LC advances, provides support during the preparation of technical employee loan and advances yet to be settled since specifications, procurement process, contract long period. Old unsettled transactions are difficult administration and management at the central office to settle due to lack of concerned documents. and issues directives to establish sound financial These old pending accounts are settled searching discipline to the offices under its supervision. the related document if available. There is distinct The division is working towards reduction of offline accounting software for payroll management, administrative expenses as well as operation and accounting, store, asset management, attendance maintenance costs for the contribution of overall management. This distinct software needs to be objective of the financial good governance of NEA. integrated to generated a complete report which AUDIT will be carried out following initiation of finance directorate in coming years. Strict compliance of Internal Audit and statutory audit are carried out Nepal Accounting Standard, Financial laws, internal timely and regularly on the basis of regularity, financial rules & regulations, policies, directives are economy, efficiency, effectiveness and rationale main guidelines for book keeping, preparation and to assure that all the transactions are carried out presentation of financial reports. and recorded sufficiently and reliably. Audit helps to correct any intentional or unintentional errors, MONITORING AND INFORMATION mismatch and wrong treatment as well as provides TECHNOLOGY SECTION feedback for further corrections, improvements The monitoring and information technology section, to the anomalies. Finance division replies to these headed by a Deputy Manager (Technical, Level 9), issues raised by auditor on the related matter after reports directly to the Deputy Managing Director comprehensive consultations with the concerned

10 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 11 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077 and monitors all the departments, divisions, projects This section also performs activities like circulates all and power stations under the Generation Directorate. the instructions received from the deputy managing director related to monitoring works; updates the This section has the mandate to prepare monitoring generation details received from the generation framework of technical works and prepares operation and maintenance departments; prepares quadrimester/annual reports after monitoring performance analysis indicator of all the related the projects and power stations according to this departments, power stations and projects. Finally, framework. In addition, this section has obligation it assists in all the technical works, identifies any to conduct budget planning discussions in assistance technical problems and informs the same to the with finance and administration divisions. Operation deputy managing director. of MIS software also falls under the jurisdiction of this section. AMI (ADVANCE METERING INFRASTRUCTURE) SYSTEM Furthermore, it organizes progress review discussions, budget compilation, and progress Advanced Metering Infrastructure/Automatic compilation for all the offices under generation Meter Reading System (AMI/AMR) is a system of directorate. It also identifies the necessity for training measuring, Collecting, Storing, Analyzing and using of technical personnel and reports to the DMD. Also, energy related data in real time. The implementation preparation of website for generation directorate of AMI system in NEA Hydropower stations was and updating the activities under this directorate initiated in last fiscal year and has been continued this falls under the responsibility of this section, thereby year too with the installation of AMI system in 33 CT utilizing information and technology to its maximum. Operated Energy Meters in different Hydropower Similarly, it studies the yearly procurement plan of Stations with the co-ordination of Smart Metering the departments, power stations and projects under Smart Grid Project under Distribution and consumer the generation directorate and submits them for Service Directorate. approval; keeps record of construction and goods procurement works’ details of all the related power stations and projects and updates in the website.

Report containing Real time energy data, generated by the Advanced Metering Infrastructure (AMI)

NEPAL ELECTRICITY AUTHORITY 11 Generation Directorate 2076/2077 12th Issue, 2077

The Energy meters used in remaining Hydropower Operation & Maintenance Manual published by Stations have either electro-mechanical type or Nepal government (Department of Electricity other old type meters which are not feasible for Development). The existing EPR software was installation on the currently available AMR/AMI designed for Windows Xp, 32-bit Operating system system of NEA. We are on the process of replacing which is now obsolete and Microsoft has stopped its such meters in all the Hydropower stations besides update and support. The newly deployed software currently replaced meters will be integrated to the will be capable to run in windows 7/8/10 or higher AMR/AMI system as soon as possible. versions with 64-bit operating system platform. Also, some of the modern features with automatic EPR (ENHANCED PERFORMANCE REWARD) graphical view of EPR will be updated and further SOFTWARE OF HYDROPOWER STATIONS it will run in centralized mode, thereby an EPR software for all the HPS can be operated through a Generation directorate is on the process single server in coming years. for updating the EPR software for the staff working on Hydropower station on the basis of

A screenshot view of the EPR software that is being implemented in the generating stations under the directorate

12 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 13 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077

LARGE GENERATION OPERATION AND MAINTENANCE DEPARTMENT

INTRODUCTION works are required. General regular maintenance works are such works which can be done without The Large Generation Operration and Maintenance unit shutdown or within few hours of unit shut Department, headed by Diector is resposible for down. Special maintenances are those which operation and maintenance of seven (7) hydropower requires multiple days of Unit/Plant shutdown. plants and one (1) Multi-fuel power plant (with Overhauling of generating units, upgradation installed capacity 30 MW and above. The total of control and protection system, installation of installed capacity of these plants is 504 MW. Total SCADA, maintenance works at headworks are generation from the power plants under this the special maintenance works. As such works department in the fiscal year 2076/77 is 2574.82 require multiple days of Unit/Plant shutdown, it GWh, with an increment of 20.77 % as compared to is the normal practice as far as possible to carry that of last fiscal year’s generation. The increment in out such works in the lean/dry season avoiding generation is mainly due to operation of new plant Upper Trishuli 3A hydropower station. energy loss. This ensures the availability of design energy during wet season. All the hydropower stations under this department are of continuous operation type Apart from preventive and corrective maintenance throughout the year. Except Kulekhani HEP, works, periodic major overhauling was carried which is seasonal storage type, plant generally out in Kaligandaki A, Middle Marsyangdi and operates to aid peaking load demand and all the Marsyangdi power plants. Kulekhani-I and remaining power stations are daily peaking ROR Kulekhani-II being reservoir type power plants type plants. Hence, both scheduled/preventive does not experience erosion problems and hence, and corrective as well as special maintenance only regular preventive maintenance activities were carried out.

MIV of Chameliya HPS

NEPAL ELECTRICITY AUTHORITY 13 Generation Directorate 2076/2077 12th Issue, 2077

KALIGANDAKI ‘A’ HYDROPOWER STATION

INTRODUCTION Overhauling of Unit No. 1 and Unit No. 3 replacement of bottom ring Kaligandaki ‘A’ Hydropower Station, located at Beltari, Syangja is the largest installed power station • Dismantling of bottom ring, alignment checking in Nepal with capacity of 144 MW with 3 units each and assembly. having capacity of 48 MW. It is a six-hour daily • Replacement of damaged runner and wicket peaking run-of-river type power station having gates with the repaired and HVOF coated parts. annual design generation of 842 GWh and was • Replacement of worn out upper stem and lower commissioned in 2002. stem bushes with repaired. • Replacement of facing plates and wearing rings The cumulative generation of the station till F/Y of head cover and bottom ring. 2076/77 has reached 13,790.321 GWh from its first run. The plant generated 871.466 GWh of energy • Replacement of turbine guide bearing, inflatable this year which is 103.50 % of the annual design shaft seal (maintenance seal). generation and 98.71% of annual generation target. • Replacement of Flat Rubber Seal and O-rings of wicket gate upper and lower bushes. REPAIR AND MAINTENANCE ACTIVITIES • Installation of newly fabricated balancing pipes. MECHANICAL MAINTENANCE • Cleaning of all generator air coolers. • Cleaning of turbine guide bearing heat exchanger Under mechanical maintenance the following works and generator lower bearing heat exchanger. has been carried out: • Welding and grinding in stay vanes of spiral casing. Replacement of MIV Main Seal of Unit No. 1 • Repair of leakage of drain in 4 sides of stay vanes Due to high sediment content in water, there was by weld filling and grinding. wearing and tearing of Main seal of Main Inlet valve • Replacement of Governor Oil, Turbine guide (MIV), some erosion on seal seat, valve disc and bearing oil and generator lower guide bearing. penstock pipe where MIV rests. As there was much oil tank with new turbine oil VG 46. leakage of water, the plant shutdown was taken to evacuate whole tunnel and penstock pipe. The Replacement of New Bottom ring of Unit No. 1 repairing of Seal seat, valve disc and penstock pipe • Dismantling of old Bottom ring, alignment was done by weld filling in worn out portion and checking and assembly of new one during grinding. The damaged main seal was replaced by overhauling. new one. Then the water is refilled gradually and unit overhaul was continued.

14 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 15 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077

• Replacement of rubber seal of de-sander flushing radial gates no. 2, 3, 4, 6,7 and 8. • Replacement of the bronze seal strips (top, bottom and lateral sides), stainless steel guide plates (top, bottom and lateral) and Guide blocks (both side) of under sluice gates. • Repair and maintenance of travelling, hydraulic and hoisting system of Old Trash Rack Cleaner Machine. • Dewatering of diversion downstream spillway to access the damage on the bucket.

ELECTRICAL MAINTENANCE

Bottom Ring in Turbine Pit

Repairing of Unit No. 2 during unit shutdown taken for system upgradation

• Condition monitoring of Runner, Wicket Gates, Stay Vanes and Spiral casing. • Inspection of leakage in MIV valve. Fig : KGA control room • Cleaning of all generator air coolers. Completion of major portion of “Plant Control • Cleaning of turbine guide bearing heat System Upgradation Work” became the highlight of exchanger. this year. Local Control Units (LCUs) for controlling • Welding and grinding in bottom ring. three Units, 132 kV GIS, common auxiliaries, 12 kV Feeders, Surge Tank Wheel Gate and Damsite Gates Dam Site Repair works along with Governor Panel, Generator Protection • Repair of seal retainer of bascule gate and Panel and Static Excitation Panel of all three Units replacement of seal. were replaced

• Repair of sill plate of Diversion Gate No 3 by Technical features of some of the major components weld filling and grinding, replacement of rubber replaced under the scope of this Project are: seal. • Replacement of damaged portion of sill beam, Unit Control Panel (also called as Unit Sequencer sill plate of Diversion Gate No 1, replacement of Panel) is provided with Redundant SPC700 Controller rubber seal. capable of supporting 10,000 blocks each. Also, two independent parallel paths of Power Supply, DC-DC • Replacement of damaged portion of sill plate of Converters and Network switches are provided to Diversion Gate No 2, replacement of rubber seal. ensure complete redundancy. Multifunction Meters

NEPAL ELECTRICITY AUTHORITY 15 Generation Directorate 2076/2077 12th Issue, 2077

(MFM) are installed to display various Electrical limit switch gets closed due to centrifugal action at parameters such as Voltage, Current, Power, Energy 600 rpm thereby tripping the Machine at this Speed. etc. The data recorded by MFM are communicated Separate independent Speed monitoring device is and integrated to Distributed Control System (DCS) also provided at Governor panel that continuously system for acquisition and recording purpose via monitors and displays the speed and also provides Modbus (RS485) over TCP/IP. backup protection for Electrical Overspeed at 360 rpm. There are two different modes of operation of Governor.

I. OPENING CONTROL MODE

In this mode, Guide Vane opening is kept constant by Governor depending on Gate Opening setpoint given by Operator. Gate opening setpoint is raised or lowered by Operator in order to raise or lower the Active Power. Active Power generated by Machine is independent of frequency in this mode.

II. LOAD CONTROL MODE

In this mode, Active Power is kept constant by Governor depending upon MW setpoint given by Operator. MW setpoint is increased or decreased in order to increase or decrease the Active Power Generation. In Load Control Mode, Automatic Frequency Control (AFC) can either be enabled or disabled. When AFC is enabled, Governor Unit control Panel reads frequency and whenever frequency error goes beyond preset value, it tries to bring back GOVERNOR: frequency within desirable range by increasing or decreasing Generation as per requirement. When Governor is provided with Redundant SPC700 AFC is disabled, Governor does not respond to Controller and redundant I/O cards for all the Frequency error and keeps the MW output Constant critical signals. Analog Input Card (4-20mA) receives which solely depends upon MW setpoint given by the Guide Vane position feedback and Analog Operator. Output Card (4-20mA) is used to give command to Distribution Valve for opening/closing Guide Vanes. EXCITATION SYSTEM: Governor receives speed information independently from three different speed sensors (speed probes). ABB’s Unitrol 6000 dual channel Excitation control Out of these three speed sensors, even if one sensor is cubicle is provided with redundant controllers damaged or shows bad value, Governor continues to and redundant power supply. Nominal Excitation function normally without interruption. However, if Voltage and Current is 123 V DC and 1470 A DC problem is identified on two or more speed sensors, respectively. The excitation system of each Unit has then Governor immediately trips the Machine. 2x100% bridges operating in parallel, with controls Governor senses Electrical Overspeed at 360 rpm and consisting of an Automatic Voltage Regulator trips the Machine above this rpm. Also, if Electrical (“AVR” or “Auto channel” or “Auto mode”) and Overspeed fails to operate at 360 rpm, Mechanical a field current regulator (“Manual channel” or overspeed is sensed when mechanically operating “Manual mode”). Two bridges with matching set

16 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 17 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077 points are operated in parallel so that in case of communicated and integrated to DCS via latest failure of one bridge, the current is taken by the Electrical Standard IEC 61850. The system integrates other bridge without needing a transfer operation. all the information from the IED protective relays on Color Touch Screen HMI is provided for interfacing the system Historian Servers for record purposes. as well as display of Electrical Parameters, Power Capability Curve and various Trends. Field flashing can be achieved either through Battery DC supply or Auxiliary AC supply or both. Magnetic Contactor has been used as Field Flashing Breaker and Air Circuit Breaker has been used as Field Circuit Breaker. ABB’s Insulating Monitoring Relay CM- IWN.5 has been installed inside Excitation Panel in order to provide Rotor Earth Fault Protection to Generator.

Protection Panel

REDUNDANCY:

Prime importance has been given to redundancy of major components in order to ensure maximum reliability of the Plant. Each LCU is provided with Redundant Controllers (one main and one standby), 2 nos. of parallel DC Supply, 2 separate Network switches along with 2 networks of Ethernet and Fiber Optics Cable to ensure complete redundancy. Also, Excitation Panel redundant I/O cards are provided on Governor Panel and 132 kV GIS Control Panel for critical Input/ PROTECTION SYSTEM: output signals. Similarly, Generator Protection Panel is equipped with 2 nos. DC Supply, two number of Two number of ABB’s REG670 Numerical Relay is REG670 Numerical relay and two number of Master provided in Protection Panel for Generator Protection Trip Relay operating in parallel so that protection of each Unit. Also, two number of parallel paths of system remains intact even in case of failure of any Power Supply, Trip circuit and Lockout relays are component. Also, two sets of HMI Server, Historian provided to ensure fully redundant protection and Reporting Server and Network Attached system. All the information of IED Relay such as Storage are provided in Server Panel for complete Digital Input/output status and Analog values are redundancy of Distributed Control System.

NEPAL ELECTRICITY AUTHORITY 17 Generation Directorate 2076/2077 12th Issue, 2077

CHALLENGES ENCOUNTERED DURING Bangalore. Each and every process, dos and don’ts, EXECUTION: safety precautions were noted in a long document and forwarded to all concerned stakeholders. With i. Time Constraint all pre-cautions and minute and detailed analysis, Online support team in Bangalore in association with ABB’s and NEA’s technical team available at site were able to commission the Excitation System and synchronize the Unit from thousands of miles away. Situation was adverse, giving up was an easy option but KGA’s and ABB’s team chose otherwise to pioneer Online commissioning via remote support for the first time in the history of both NEA and ABB.

PROGRESS SO FAR

Control System upgradation work More than 90% of works under the scope of this The greatest battle was to be fought against time Project has been successfully completed. However, constraint during execution of Upgradation Works. some of the works (such as installation of few Field Shutdown required for upgradation of Units had Instrumentation Devices and Sensors at Damsite/ to be minimized to the extent possible for meeting Powerhouse, Extension of Fiber Optics Cable Power demand in dry season. Control System from Power House to Damsite and Installation of Upgradation work of Unit No. 1 and Unit No. 3 was Additional aided device for MIV) are still remaining scheduled during overhauling in order to minimize and is projected to be completed within December the Outage. As per the approved schedule, 1st Unit 2020. had to be commissioned in 28 days, 3rd Unit in 22 days and 2nd Unit in 10 days. The task, specially Civil Maintenance completion of entire work of Unit No. 2 in just 10 Some of the major work accomplished in the fiscal days seemed daunting. However, ABB’s and KGA’s year 2076/77 under civil section were as following technical team available at site worked day and night to achieve astounding feat of completing this 1. Desander basin repair work job within given timeframe. The base of the Desander basin was damage due to ii. Online Testing and Commissioning of the uplift flow of water. This damage created was Excitation System of the big truck size pit which was filled with sand and other debris. Due to this, it had obstructed sand Excitation commissioning Engineer had left to the flushing activities and prolonging flushing time and other Site. Other ABB Engineers and KGA team delay in resuming generation. were working on Unit No. 3, when the nationwide lockdown was announced both in Nepal and India. 2. Damage inspection of diversion spillway Time was running out and the second Unit which was in Shutdown had to be brought back to generate The damage inspection of roller buckets of the Power within Shutdown window. There wasn’t diversion spillway was also done. After the any certainty about when the nationwide lockdown completion and commercial operation of the plant, was going to end. Pressure was enormous. With such inspection hadn’t been done. The damage the confidence of ABB’s and NEA’s team available was found severe in gate No. 3 and subsequently at site and consent of upper management of both damages were also seen in other remaining two the sides, it was decided to test and commission gates also. Damages such as wash away of high Excitation System online via Remote Support from strength concrete, breaking of reinforcement, and

18 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 19 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077 disturbing the design profile of the ogee surface current and gust of massive discharge of Kaligandaki were observed. For the repair and maintenance of river. it, consultation with Japanese experts was done and as per their recommendations, immediate action 4. Study of left bank slope protection work repair is needed. Moreover, the epoxy coatings (hard During the wet season, at the confluence of coatings) on the top portions of ogee surface of all Kaligandaki river and Aandhikhola river, due to high three gates of diversion spillway were also carried flood current toe cutting problem at left riverbank of out. the river has been seen for a long time. But now a 3. Installation of the floating boom (A new trial) day’s damage is increasing rapidly and this is also creating a threat of massive landslide. By making the Floating debris is another critical challenge in landmass above such toe cutting unstable and sliding Kaligandaki “A” power plant. It increases the downwards gradually. Sliding marks could be seen working load of trash rack cleaning activities during on the access road to Dam. An independent study the wet season, frequent choking of trash racks, and was carried out by a private French company, which creates disturbances in the free flow of water into is renowned in the field of slope protection work and desander. So a new trial was done by installing a they have recommended an effective way to handle floating boom in front of intake to divert all floating such type of critical problem. Altogether 250-meter debris towards the gates of diversion spillway. It length is in danger zone and affected height due to worked very well in the dry season, but in the wet toe cutting is about 32 meters. If massive landslide season, some damages were done in the components occurs, all the debris will fill the significant portion of the floating boom due to the impact of high-water of reservoir effecting generation of power plant.

SALIENT FEATURES

Type Peaking Run of river (6 hours daily peaking)

Location Kaligandaki Rural Municipality, Syangja

Installed capacity 144 MW

Annual design generation 842 GWh

Maximum gross heat/net head 130m / 115m

Catchment area 7618 km2 (Kaligandaki river) and 476 km2 (Andhikhola river)

Live storage volume 3.1 million m3

Total length of waterways 183m power conduit, 5905m headrace tunnel

Penstock 1 Nos., 243m long, Ø 5.25m, inclined steel lined

Turbine:

Number & Type 3 Francis

Output 48MW each

Rated flow 47 m3/s per unit

Rated speed 300rpm

Generator:

Rated output 56.5MVA

Rated voltage 13.8kV

Rated frequency 50Hz

Rated power factor 0.85

NEPAL ELECTRICITY AUTHORITY 19 Generation Directorate 2076/2077 12th Issue, 2077

Excitation Static

Power transformer 56.5 MVA, 13.8/132 kV, 3 phase, 3 nos.

132kV, 104.6km (Single circuit of 65.5km to Pokhara sub-station and double circuit Transmission line of 39.1 km to Butwal sub-station)

Monthly Energy Generation Trend of last 3 Years 120,000.00

100,000.00

80,000.00

60,000.00

40,000.00 Generation (MWh) 20,000.00

- Shrawan Bhadra Aswin Kartik Mangsir Poush Magh Falgun Chaitra Baisakh Jestha Ashad FY 2074/75 101,725.00 101,928.00 102,818.00 92,307.00 64,444.00 48,791.00 41,121.00 36,950.00 40,748.00 50,251.00 82,633.00 101,359.00 FY 2075/76 100,902.00 98,017.00 65,650.00 67,913.00 63,726.00 48,224.00 43,580.00 44,728.00 55,593.00 88,709.00 99,146.00 95,726.00 FY 2076/77 98,957.00 95,071.00 83,278.00 80,846.00 66,111.00 49,345.00 43,666.00 38,692.00 53,715.00 72,132.00 97,224.00 92,429.00 Months

Actual Generation comparison with Target and Designed Generation 120,000.00

100,000.00

80,000.00

60,000.00

40,000.00 Energy (MWh)

20,000.00

- Shrawan Bhadra Aswin Kartik Mangsir Poush Magh Falgun Chaitra Baisakh Jestha Ashad Actual 91,666.17 89,089.60 82,228.64 80,686.02 77,284.39 55,602.76 43,829.77 42,296.05 49,230.23 61,823.35 81,837.13 86,998.36 Target 98,957.00 95,071.00 83,278.00 80,846.00 66,111.00 49,345.00 43,666.00 38,692.00 53,715.00 72,132.00 97,224.00 92,429.00 Designed 96,192.49 96,192.15 84,977.66 81,662.71 72,841.80 54,884.69 44,455.04 40,114.09 52,337.41 75,274.20 91,332.73 92,595.69 Month of 2076/077

20 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 21 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077 Ashad 86,998.36 29,835.00 44,749.00 18,488.00 57,388.00 65,881.00 77,753.00 85,124.00 71,830.00 71,336.00 93,365.00 90,746.00 94,378.00 97,818.00 94,150.00 44,152.00 96,110.00 95,726.00 92,429.00 101,359.00 Jestha 81,837.13 35,629.00 51,817.00 43,094.00 63,889.00 63,337.00 67,596.00 78,783.00 59,477.00 75,593.00 85,843.00 93,203.00 91,419.00 84,210.00 96,732.00 59,201.00 88,297.00 82,633.00 99,146.00 97,224.00 Baisakh 61,823.35 39,413.00 55,907.00 48,534.00 50,484.00 50,026.00 64,899.00 59,890.00 49,995.00 52,461.00 52,656.00 52,635.00 63,648.00 53,606.00 72,514.00 50,026.00 60,017.00 50,251.00 88,709.00 72,132.00 Chaitra 49,230.23 13,137.00 47,077.00 45,445.00 40,784.00 42,325.00 60,445.00 39,539.00 37,985.00 44,896.00 38,994.00 46,979.00 44,102.00 42,398.00 54,446.00 42,762.00 51,118.00 40,748.00 55,593.00 53,715.00 - Falgun 42,296.05 41,836.00 38,545.00 38,680.00 38,487.00 45,451.00 39,388.00 34,545.00 36,700.00 38,588.00 38,628.00 33,049.00 39,834.00 49,830.00 36,393.00 39,253.00 36,950.00 44,728.00 38,692.00 - Magh 43,829.77 42,455.00 41,811.00 44,156.00 42,590.00 38,141.00 40,849.00 40,746.00 39,437.00 40,719.00 41,116.00 42,012.00 43,803.00 47,628.00 39,552.00 42,031.00 41,121.00 43,580.00 43,666.00 - Poush 55,602.76 53,015.00 49,833.00 51,423.00 51,237.00 50,050.00 53,445.00 46,916.00 51,286.00 52,327.00 53,209.00 46,001.00 54,688.00 63,775.00 45,187.00 53,708.00 48,791.00 48,224.00 49,345.00 - Actual Generation (MWh) Mangsir 77,284.39 56,208.00 52,353.00 50,501.00 62,455.00 61,716.00 71,406.00 70,734.00 74,531.00 72,479.00 76,345.00 64,932.00 76,451.00 79,804.00 62,790.00 80,170.00 64,444.00 63,726.00 66,111.00 - Kartik 80,686.02 30,875.00 47,427.00 35,781.00 46,313.00 56,461.00 66,687.00 83,169.00 73,734.00 76,109.00 86,031.00 82,537.00 86,067.00 89,647.00 87,804.00 91,053.00 92,307.00 67,913.00 80,846.00 ENERGY GENERATION SINCE COMMISSIONING SINCE GENERATION ENERGY - Aswin 82,228.64 31,011.00 38,641.00 37,565.00 51,050.00 49,506.00 69,083.00 82,606.00 80,250.00 82,943.00 89,537.00 90,407.00 91,030.00 93,846.00 93,238.00 90,518.00 65,650.00 83,278.00 102,818.00 - Bhadra 89,089.60 30,223.00 50,793.00 43,189.00 52,762.00 63,670.00 78,497.00 86,044.00 79,966.00 87,880.00 95,179.00 97,864.00 95,962.00 94,718.00 93,079.00 89,668.00 98,017.00 95,071.00 101,928.00 - Shrawan 91,666.17 27,416.00 52,681.00 37,812.00 54,885.00 72,058.00 76,311.00 89,321.00 80,051.00 53,269.00 97,146.00 96,909.00 98,236.00 92,893.00 96,658.00 60,206.00 98,957.00 101,725.00 100,902.00 Total 842,572.47 118,014.00 512,589.00 527,645.00 551,652.00 621,348.00 707,746.00 759,002.00 753,368.00 760,241.00 775,172.00 860,754.00 847,258.00 864,103.00 929,983.00 750,842.00 842,149.00 865,075.00 871,914.00 871,466.00 13,790,321.00 Year Fiscal 2058/059 2059/060 2060/061 2061/062 2062/063 2063/064 2064/065 2065/066 2066/067 2067/068 2068/069 2069/070 2070/071 2071/072 2072/073 2073/074 2074/075 2075/076 2076/077 Total Designed 1 2 3 4 5 6 7 8 9 S. 10 11 12 13 14 15 16 17 18 19 N.

NEPAL ELECTRICITY AUTHORITY 21 Generation Directorate 2076/2077 12th Issue, 2077

MIDDLE MARSYANGDI HYDROPOWER STATION

INTRODUCTION • Repair of Sill Beams and Replacement of Bottom Seals in all 3 Spillway Radial Gates at Dam Site. Middle Marsyangdi Hydropower Station (MMHPS) • Repair of Sliding & Fixed plates, Rubber has been generating electricity by diverting the seals and Sill Beams of Flushing Gates of all 3 water of Marsyangdi River originated from the De-sanding Units at Dam Site. Tilicho Lake in Manang district. Located in the • Repair of Intake and Spillway radial Gate Stop Lamjung district of Gandaki Province, MMHPS has Logs at Dam Site an installed capacity of 70 MW and a design annual generation of 398 GWhr.

MMHPS is a peaking run-off-the-river (PRoR) plant with daily peaking capacity of 5 hrs at minimum discharge. The plant was commissioned in December, 2008 and commercial generation was started one month later. The cumulative generation of the station has reached 4,926.55 GWh until the end of FY 2076/77. The total generation during this FY is 446.62 GWh, which is 112.22 % of the annual design generation and 96.36% of generation target.

REPAIR AND MAINTENANCE ACTIVITIES

MECHANICAL MAINTENANCE Placement of Intake Stop Logs for De-sander repair • Repair of complete set of Francis Runner and • Replacement of Heat Exchanger plates of cooling other Turbine Accessories water system of both units. • Dismantling of Turbine Accessories during Unit • Replacement of 3 nos. of broken spring-loaded # 2 Overhauling for the necessary repair studs of generator brake of Unit-1. • Installation of 4 new sets of Bulkhead Gates for De-sander outlets at Dam Site. Electrical Maintenance

• Insulation and BDV testing done in power transformers during overhauling of Unit-2.

Removal of Bottom Ring during Unit-2 Overhauling

22 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 23 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077

Testing of Power Transformer during Unit-2 Overhauling

• All interconnection facilities for Transmission Inspection of Gabion Walls at Downstream End of Spillway line coming from Dordi Corridor connected in MMHPS Switchyard and incorporated in • Regular maintenance works of Water Supply, SCADA system. Sewerage and Sanitation system around Dam Site, Powerhouse and colony areas. • Solenoid Valve replacement and repair of raking/travel mechanism for Trash Rack • Repair and maintenance works of Quarter Cleaning Machine at Dam site. Buildings. • Replacement of PLC cards for Unit-2 Governor and Intake Gate no.2. • Replacement of motor in close circuit cooling water system of Unit-1. • Unit-1 control system made more reliable. • Carbon brush replacements for both units. • Replacement of cable head for power cable of power transformer L1of Unit-1. • Bush cutting and other maintenance works of 33kV, 11kV, 400V and street light lines.

CIVIL MAINTENANCE

• Contract award for Rehabilitation Works of downstream Spillway no. 3 at Dam Site. • Maintenance of Gabion Structures at Left and Right banks of Spillway at Downstream end of Dam Site. • Sediment Sampling works at Intake, De-sander Outlet and Draft tube of Power House for measurement of sediment concentration. • Application of High-Performance Abrasion Resistant Epoxy Compounds at Spillway Chutes-1 & 3.

Epoxy Compound Application Works at Spillway Chute

NEPAL ELECTRICITY AUTHORITY 23 Generation Directorate 2076/2077 12th Issue, 2077

SALIENT FEATURES

Type of project Peaking Run off river with daily pondage for 5 hours peaking Maximum gross head/net head 110m/98m Total length of water ways 5940m Power and Energy: Installed capacity 70 MW Annual designed generation 398 GWh Hydrology: Catchment Area 2,729 km2 Reservoir: Minimum/Maximum operating level 621.0 masl/626.0 masl Live storage volume 1.65 million m3 Dam: Type of dam Combined concrete gravity and rock fill dam Height 45m Penstock: Number, Type 1, concrete castes steel pipe (cut and cover) Diameter penstock/bifurcation-manifold Ø4.6m/ Ø3.0m to Ø240m Switchyard: Type Open- air switchyard at el. 540.0 masl Dimension(L×W) 43m×50m Turbine: Number and Type 2 Francis, vertical shaft Rated Discharge 42.4 m3/s Rated speed 333.33 rpm Generator: Number and type Two, 3-phase synchronous Rated output 39 MVA Power factor 0.85-0.90 Transmission line: Route CKT1 MMHPS to Damauli CKT2 MMHPS to Markichwok S/S Nominal voltage/ length 132 kV, CKT1=42.69 km 132 kV, CKT2=31.5 km

Monthly Energy Generation Trend of last 3 Years 60,000.00

50,000.00

40,000.00

30,000.00

20,000.00 Generation (MWh) 10,000.00

- Shrawan Bhadra Aswin Kartik Mangsir Poush Magh Falgun Chaitra Baisakh Jestha Ashad FY 2074/75 51,182.13 51,020.62 50,314.75 44,467.37 31,968.76 24,708.74 20,006.26 14,860.37 21,243.75 27,266.25 47,447.87 52,800.00 FY 2076/77 51,511.75 50,778.80 38,733.70 40,775.75 35,598.75 26,420.50 23,203.10 22,192.40 24,296.50 35,495.50 48,963.80 48,654.20 FY 2075/76 50,830.13 49,500.13 51,614.00 44,704.70 32,082.20 24,471.60 21,058.00 22,842.30 29,473.10 48,551.10 49,417.50 46,777.75 Months

24 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 25 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077 Ashad 47,135.00 39,922.30 38,929.70 43,511.00 44,921.25 46,468.12 48,747.28 50,325.00 49,757.88 49,809.37 52,800.00 46,777.75 48,654.20 Jestha 39,615.00 36,794.70 40,017.00 44,877.40 48,525.43 46,612.51 47,267.25 49,097.69 43,549.63 44,234.75 47,447.87 49,417.50 48,963.80

Baisakh 26,305.00 30,667.10 32,187.90 28,733.20 31,159.25 33,288.75 30,091.88 37,981.05 27,091.00 32,370.88 27,266.25 48,551.10 35,495.50 Ashad 47,135.00 48,654.20 50,134.72 Chaitra 17,565.00 22,049.70 23,992.00 20,831.30 26,137.00 22,739.02 22,120.37 26,554.75 21,357.12 27,627.25 21,243.75 29,473.10 24,296.50 Jestha 39,615.00 48,963.80 47,225.87 Falgun Baisakh 26,305.00 35,495.50 40,305.11 14,610.00 25,998.60 19,092.30 19,874.80 22,233.67 21,063.29 20,779.62 23,625.88 19,243.12 20,666.25 14,860.37 22,842.30 22,192.40 Chaitra 17,565.00 24,296.50 25,949.41 Magh 15,990.00 13,567.40 21,344.30 21,542.80 12,596.83 21,573.81 22,579.19 11,838.75 20,686.88 21,285.00 20,006.26 21,058.00 23,203.10 Falgun 14,610.00 22,192.40 20,738.07 - Poush Magh 21,410.00 15,990.00 23,203.10 20,043.55 27,101.30 27,531.70 27,596.25 24,383.87 28,704.88 30,473.37 25,080.00 27,121.87 24,708.74 24,471.60 26,420.50 Poush - 21,410.00 26,420.50 26,195.15 Month of 2076/077 of Month Actual Generation (MWh) Mangsir 30,805.00 36,810.44 20,057.90 36,903.32 33,758.00 37,743.81 37,403.50 32,917.50 38,579.13 31,968.76 32,082.20 35,598.75 Mangsir 30,805.00 35,598.75 34,694.42 - Kartik 42,225.00 37,728.29 37,942.20 43,003.00 41,152.02 42,131.62 47,231.25 44,632.50 47,550.87 44,467.37 44,704.70 40,775.75 Kartik 42,225.00 40,775.75 45,950.47 - Aswin ENERGY GENERATION SINCE COMMISSIONING SINCE GENERATION ENERGY Aswin 46,980.00 38,733.70 50,839.29 46,980.00 34,276.82 38,460.50 42,804.70 45,674.04 43,482.69 47,179.75 49,695.87 47,004.38 50,314.75 51,614.00 38,733.70 ActualGenerationcomparison with Target and DesignedGeneration Bhadra 47,110.00 50,778.80 50,301.21 - Bhadra 47,110.00 40,565.50 34,967.10 46,377.90 45,292.50 43,090.80 48,324.38 49,830.13 49,469.13 51,020.62 49,500.13 50,778.80 47,840.00 51,511.75 51,095.94 Shrawan - 0.00

Actual Target Designed

Shrawan 47,840.00 37,991.85 38,821.40 43,085.60 46,076.26 47,432.32 47,282.72 51,717.13 48,932.74 51,182.13 50,830.13 51,511.75 60,000.00 50,000.00 40,000.00 30,000.00 20,000.00 10,000.00 Energy (MWh) Energy Total 397,590.00 168,999.80 390,037.40 377,151.30 425,344.20 428,082.19 434,171.71 457,318.09 435,558.76 454,651.62 437,286.87 471,322.51 446,624.75 4,926,549.20 Year Fiscal 2065/066 2066/067 2067/068 2068/069 2069/070 2070/071 2071/072 2072/073 2073/074 2074/075 2075/076 2076/077 Total Designed 1 2 3 4 5 6 7 8 9 10 11 12 S.N.

NEPAL ELECTRICITY AUTHORITY 25 Generation Directorate 2076/2077 12th Issue, 2077

MARSYANGDI HYDROPOWER STATION

INTRODUCTION stone deposited in Under sluice tunnel was cleared. This year, shaft seal of all the units were changed Marsyangdi Hydropower station is peaking run-off- as per requirements. In order to control the bearing river type power station, located at Aabookhaireni, temperature, Unit 2- Generator Combined Upper Tanahun in the Gandaki province with installed Guide Bearing bundle Heat Exchanger with casing capacity of 69 MW and annual design generation & Unit 1- Generator Lower Guide Bearing heat of 462.5 GWh. It was commissioned in 1989 AD exchanger were replaced. Also, three newly supplied and developed with the assistance from IDA, KFW, Turbine Guide Bearing Heat Exchanger was installed KFED, SFD, ADB and GoN at the cost of USD 221.57 in all three units. Two sets of air compressor of GIS million. The cumulative generation of the station has were overhauled in which piston rings, valves and reached 12,851.205 GWh until the end of FY 2076/77. other necessary parts were changed. Removal of In FY 2076/77, it generated 443.852 GWh of energy sand and mud from the drainage gallery was done in which is 95.97 % of annual design generation and regular basis whereas Gravity Tank cleaning works 92.91% of generation target. were done in multiple times as per requirement during plant shutdown for flushing of de-sander REPAIR AND MAINTENANCE ACTIVITIES basin. As a new initiative, Auto Section was brought in operation in Powerhouse for general repair & MECHANICAL MAINTENANCE maintenance of office vehicles.

• Overhauling work of unit-3 turbine. As the future work schedule, contract agreements • Repair and Maintenance works of Diversion have been done for replacement of 3 sets of Turbine Radial Gates no. 2 and 3. facing plates & Wearing ring sets for all Units, installation of GIS “On Valve” Block (new one) for Circuit breaker of Unit 3, replacement of by-pass filling Valves & Sliding Rings in Turbine Units.

Replacement of sill plate of gate no. 3 of diversion weir

Similarly, minor repair & inspection of all other diversion gates was completed & also sediments and Runner of Unit-3 during Turbine overhauling

26 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 27 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077

ELECTRICAL MAINTENANCE The major works completed this year include;

• Re-establishment of electrical connections of • Removal of deposited sediments/Debris from all the weir site gates (Diversion Gates) control the under-sluice tunnel gallery at weir site. panels. • Up-gradation and maintenance works of • Insulation testing of Unit-3 power transformers colony, dam site water supply system intake to and Generators. distribution point. • Testing and inspection of Circuit Breakers and • Application of high strength epoxy compound various Feeders. on Gate no. 2 & 3 and damaged weir surface. • Recovery of operation system of surge tank • Concreting around sill beam area of gate no. emergency gate from Power House Control 2 and 3 maintenance of the sill beam and sill Room. sitting plate. • Multiple tasks like; transformer oil filtering, • Repair and maintenance of Guest House and insulation testing, generator windings cleaning, Staff quarter. etc. were done during turbine overhauling of Unit-3 turbine. In the coming year, upgradation of double channel redundant type digital governor for Unit Control of all Units and Up gradation of 24 V Battery Charging Rectifier Unit shall be completed for which contract agreement has been already done for both works.

CIVIL MAINTENANCE Dhakaltar Guest House Regular civil maintenance includes condition For the fiscal year, contract agreements have been monitoring of weir site, maintenance of physical done for the up-Stream Right Bank protection infrastructures of powerhouse and Dhakaltar colony. work at weir Site, application of high-performance During rainy season, periodic flushing of de-sander abrasion resistant Epoxy compounds for Ogee Weir basin is done as per requirement after performing and Divider Wall surface and removal of deposited Eco sound to know the amount of settled sand in the sand sediments of Compensating Poundage in front basin. of Intake at weir site.

SALIENT FEATURES

Type Peaking-run-of-river Location AanbuKhaireni Rural Municipality, Tanahun Installed capacity 69 MW Aannual design generation 462.5 GWh Catchment area 3850 Sq. km Average annual discharge 210m3/s Live storage volume 1.5 million m3 Rated net head 90.5m Weir 102m long, Concrete Head race tunnel 7199m, Ø 6.4m, concrete lined Penstock 75m long, Ø 5m, steel lined

NEPAL ELECTRICITY AUTHORITY 27 Generation Directorate 2076/2077 12th Issue, 2077

Turbine: Number and Type 3, Vertical Francis Rated discharge 30.5m3/s Rated output 26 MW Rated speed 300 rpm Generator: Capacity 30 MVA Rated voltage 11 kV Rated Frequency 50 Hz Power factor 0.85 Excitation Thyristor Self Excitation Power transformer 10 MVA, 11/132 kV, 9 (+1 Spare) Single phase Transmission line 132kV, Total 108 km (Balaju 83km + Bharatpur 25km)

Monthly Energy Generation Trend of last 3 Years 60,000.00

50,000.00

40,000.00

30,000.00

Generation (MWh) 20,000.00

10,000.00

- Shrawan Bhadra Aswin Kartik Mangsir Poush Magh Falgun Chaitra Baisakh Jestha Ashad FY 2074/75 45,329.20 45,978.30 48,568.00 46,168.50 35,988.50 28,317.70 23,420.80 21,454.80 24,396.60 31,968.80 48,696.90 47,202.20 FY 2075/76 45,197.20 44,981.20 48,936.50 46,863.20 36,038.30 27,926.50 25,314.00 24,811.50 31,695.80 47,422.20 52,096.70 43,892.90 FY 2076/77 44,759.80 44,295.50 35,862.00 40,075.60 40,354.90 30,027.40 26,595.00 25,269.00 26,125.10 38,577.50 46,652.60 45,257.70 Months

Actual Generation comparison with Target and Designed Generation 60,000.00

50,000.00

40,000.00

30,000.00

Energy (MWh) 20,000.00

10,000.00

- Shrawan Bhadra Aswin Kartik Mangsir Poush Magh Falgun Chaitra Baisakh Jestha Ashad Actual 44,759.80 44,295.50 35,862.00 40,075.60 40,354.90 30,027.40 26,595.00 25,269.00 26,125.10 38,577.50 46,652.60 45,257.70 Target 46,795.28 46,313.17 47,553.78 47,465.29 41,167.26 31,218.45 25,209.07 24,171.03 29,071.16 42,241.14 49,735.95 46,756.97 Designed 46,750.00 46,750.00 46,750.00 46,750.00 46,750.00 31,150.00 24,150.00 21,500.00 25,000.00 38,400.00 46,750.00 46,750.00 Month of 2076/077

28 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 29 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077 Ashad 46,750.00 30,349.90 41,246.80 42,615.50 38,716.10 44,546.50 44,234.30 45,298.70 42,111.10 49,068.70 48,008.70 36,943.00 43,949.30 30,273.30 29,887.10 24,925.00 34,814.70 38,046.00 44,964.70 42,989.40 40,854.80 38,851.00 45,473.60 46,620.50 46,191.40 50,190.10 Jestha 46,750.00 29,583.30 41,010.70 39,833.40 41,785.90 45,457.50 47,651.30 47,603.60 44,465.30 52,012.20 45,308.80 47,235.80 41,439.20 29,918.00 28,443.10 27,567.60 30,886.10 39,820.50 41,072.50 44,995.00 39,735.90 41,188.90 46,449.00 48,613.00 46,635.10 46,217.80 Baisakh 38,400.00 34,226.60 32,177.00 27,935.70 34,875.70 29,135.70 40,949.70 39,525.90 35,100.40 44,755.90 39,232.60 35,728.50 30,835.20 31,768.70 30,028.60 27,826.00 25,836.60 30,074.50 34,846.00 36,860.30 33,865.60 34,223.20 29,757.00 32,558.20 34,303.70 30,313.80 Chaitra 25,000.00 25,666.90 25,147.90 23,529.90 21,045.20 28,609.00 27,335.70 30,042.70 26,803.70 31,546.80 23,925.90 26,830.80 21,290.10 27,786.60 27,192.90 13,842.30 23,326.20 23,994.80 27,534.80 23,424.40 24,087.40 24,728.30 21,900.40 27,934.20 23,855.40 24,027.60 Falgun 21,500.00 24,130.50 22,322.40 23,092.60 22,425.90 22,114.60 22,647.20 27,757.60 24,401.00 25,853.30 22,896.10 23,430.40 22,956.10 22,505.20 24,589.30 18,843.90 22,803.80 22,229.70 21,473.40 23,429.80 20,425.50 21,430.00 22,755.80 24,523.90 23,452.80 23,338.40 Magh 24,150.00 25,507.50 23,932.40 24,502.40 23,796.10 25,274.70 23,108.00 28,052.10 26,893.20 28,250.90 25,394.30 25,838.10 24,655.70 26,187.90 25,028.30 21,190.30 25,621.20 24,506.80 22,784.20 23,738.50 23,340.40 23,229.60 23,859.00 25,909.20 24,507.00 25,847.80 Poush 31,150.00 28,116.90 29,639.50 29,617.60 28,547.20 28,664.30 28,376.00 33,579.60 32,711.70 34,435.80 32,712.70 32,644.70 30,556.80 29,183.40 31,181.90 22,216.20 29,490.40 28,848.60 27,813.80 31,449.40 28,720.90 28,733.10 30,600.30 31,715.70 27,769.20 32,649.90 Actual Generation (MWh) Mangsir 46,750.00 22,510.50 34,756.10 35,882.60 37,042.20 41,574.80 35,703.90 43,083.60 44,132.00 40,728.70 41,708.80 42,962.10 40,844.40 37,262.10 34,847.60 18,980.70 32,249.10 35,501.20 33,066.90 38,180.50 39,697.20 39,229.80 39,868.40 34,698.00 38,143.30 42,266.00 Kartik 46,750.00 11,896.80 20,642.20 39,535.50 38,437.70 42,888.70 47,767.60 47,068.70 45,794.00 47,279.40 50,929.70 48,756.20 44,548.70 35,842.70 27,047.60 19,045.50 23,161.80 26,496.90 33,373.20 32,214.10 43,177.80 37,211.20 40,607.20 44,563.40 45,590.00 44,153.30 ENERGY GENERATION SINCE COMMISSIONING SINCE GENERATION ENERGY Aswin 444.70 46,750.00 20,794.50 42,056.40 36,649.70 43,013.90 47,124.00 49,076.70 46,848.20 11,889.90 49,488.60 44,736.60 39,654.70 37,313.40 23,938.10 12,237.00 26,408.40 29,468.90 36,556.30 35,308.60 34,108.30 38,800.80 41,360.20 37,491.70 45,991.70 47,394.30 - Bhadra 46,750.00 23,836.90 42,583.80 39,966.10 37,374.90 42,356.90 46,607.30 47,271.10 39,568.60 46,214.60 46,655.10 44,408.50 34,592.90 24,753.20 22,506.40 32,193.60 34,169.40 40,458.60 40,088.50 34,515.50 39,339.30 42,258.30 45,602.40 45,592.60 47,357.80 - 46,750.00 Shrawan 33,375.70 42,177.40 38,733.10 34,855.00 42,553.90 46,231.70 48,743.50 44,569.10 46,104.70 45,906.70 45,847.60 43,499.00 26,983.30 15,470.90 28,925.90 36,259.00 37,623.90 40,121.30 42,275.90 38,039.70 38,272.10 45,669.20 48,103.80 47,931.30 Total 467,450.00 232,433.60 348,882.10 413,362.80 402,020.90 423,509.60 449,808.50 483,928.20 465,275.20 449,959.30 471,925.50 457,668.00 430,986.30 386,133.20 333,921.00 244,651.80 335,717.80 369,416.30 401,568.30 412,799.80 404,805.20 405,004.90 423,161.30 445,899.40 450,136.00 461,688.10 2046/047 2047/048 2048/049 2049/050 2050/051 2051/052 2052/053 2053/054 2054/055 2055/056 2056/057 2057/058 2058/059 2059/060 2060/061 2061/062 2062/063 2063/064 2064/065 2065/066 2066/067 2067/068 2068/069 2069/070 2070/071 Fiscal Year Designed

1 2 3 4 5 6 7 8 9 S. 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 N.

NEPAL ELECTRICITY AUTHORITY 29 Generation Directorate 2076/2077 12th Issue, 2077 Ashad 46,750.00 47,863.10 46,109.60 45,906.60 47,202.20 43,892.90 45,257.70 Jestha 46,750.00 49,584.90 45,033.40 44,950.10 48,696.90 52,096.70 46,652.60 Baisakh 38,400.00 36,966.20 27,416.60 34,827.00 31,968.80 47,422.20 38,577.50 Chaitra 25,000.00 29,409.00 22,841.60 31,122.10 24,396.60 31,695.80 26,125.10 Falgun 21,500.00 26,809.30 21,779.10 22,961.80 21,454.80 24,811.50 25,269.00 Magh 24,150.00 26,605.70 23,532.30 24,960.00 23,420.80 25,314.00 26,595.00 Poush 31,150.00 35,540.50 28,660.50 30,838.70 28,317.70 27,926.50 30,027.40 Actual Generation (MWh) Mangsir 46,750.00 41,677.80 36,995.30 43,117.30 35,988.50 36,038.30 40,354.90 Kartik 46,750.00 49,103.80 45,954.70 47,630.50 46,168.50 46,863.20 40,075.60 Aswin 46,750.00 36,827.60 47,612.60 46,015.90 48,568.00 48,936.50 35,862.00 Bhadra 46,750.00 46,659.20 46,974.50 46,225.10 45,978.30 44,981.20 44,295.50 46,750.00 Shrawan 45,934.40 48,826.40 46,750.40 45,329.20 45,197.20 44,759.80 Total 467,450.00 472,981.50 441,736.60 465,305.50 447,490.30 475,176.00 443,852.10 12,851,205.10 2071/072 2072/073 2073/074 2074/075 2075/076 2076/077 Fiscal Year Total Designed

S. 26 27 28 29 30 31 N.

30 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 31 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077

UPPER TRISULI 3A HYDROPOWER STATION

INTRODUCTION On 2nd Jestha, 2076 and 17th Shrawan, 2076, 72 hours generation test of Unit 1 and Unit 2, respectively Upper Trishuli 3A (UT3A) Hydro Power Station is was completed, by synchronizing with the national a 60 MW Run of River type power plant located in grid. In this Fiscal Year 2076/77, the Power Station Rasuwa and Nuwakot districts. The annual design generated 407.551 GWh, which is 83.21 % of the generation of the Power Station is 489.76 GWh, with annual design generation. While the cumulative design discharge of 70% PoE (the highest among generation of the station till F/Y 2076/77 has reached other power plants). The construction of this power 423.736 GWh from the first run. plant was initiated in June 2011. The power plant is being financed by a soft loan from China Exim Bank. REPAIR AND MAINTENANCE ACTIVITIES The estimated cost of the project is 125.775 Million US$ and the loan from China Exim Bank is expected MECHANICAL MAINTENANCE to cover the cost of the major project works including Major hydro-mechanical works are related to Civil, Electro-Mechanical, Hydromechanical and the defect treatment of Radial Gates Hydraulic Transmission Line works. Since the handover of Mechanism and works related to the leakage UT3A project, by CGGC to NEA, and the beginning treatment in other vertical sliding gates. of Defect Liability Period (DLP) from 1st August, 2019, the Power Station has facilitated CGGC in For instance, there was pronounced leakage in works appended in the Punch List in and other the Top Cover of Draft Tube Maintenance Gate of works appearing during the operation of the Power both Units; UT3A power station, in coordination Station. The Project contract cost for civil. EM, HM with CGGC personnel, treated this issue. Electro- works is USD 100.771 millions (2010) and T/L is mechanical works, in these periods has been the USD 17.371 millions and NRs 611.266 million (2011) repair of governor system and its solenoid operating including VAT in EPC model. valves. There was an issue with Emergency Stop Valve of Governor System of Unit #2; it severely hampered the operation of the Unit for some time and has been partially solved. There has been repair works related to Upper Guide Bearing Pads of Unit- 2, leakage treatment of Butterfly Valve Expansion Joint, treatment and repair of Pressure Reducing Valve (PRV) of Unit-1, repair of Four Way Globe Valve of Unit-2 Cooling Water System, repair and treatment of leakage from the joint of Fire Fighting Pump installed at Valve Floor and so on.

Powerhouse Hall

NEPAL ELECTRICITY AUTHORITY 31 Generation Directorate 2076/2077 12th Issue, 2077

ELECTRICAL MAINTENANCE Headworks and heat shrinkable cable termination of 11 kV cable at GIS side were changed. Moreover, The contactor has partially completed the lighting CCTV monitoring system at both headworks and system, HVAC system, fire protection system, underground powerhouse were installed and the fire alarm system and communication system at surveillance can now be done from Station Chief Underground Powerhouse and GIS by the contactor. office and control rooms. In addition, partial completion of lighting system, communication system and fire alarm system has CIVIL MAINTENANCE also been carried out at headworks. New spare optical Construction of new Control room for the proper fiber cable was stringed from GIS to Headworks by monitoring of barrage area and operation of gates at the contactor. head works area.

• Construction of Plumb Concrete wall for protection of river embankment at downstream of head works. • Side drain is constructed for the removal of rainy water into the canal. • For the protection of property, fencing work is done at office and Quarter area. • Epoxy painting work is done at underground powerhouse for the strong, durable and resistant floor. • Warning boards for the local people were MIV leakage maintenance installed at probable entry of the river to reduce Furthermore, the broken optical fiber from GIS to the chances of accident by variation in river flow. headworks were repaired and the communication • To reduce the choking off the intake trash rack, was established. The faulty LV winding thermometer excavation work has been done at the upstream and sensor of 36 MVA power transformer and oil of ungated weir. level sensor of upper guide bearing of Unit-1 were changed. In addition, Unit-1 MIV pressure balance • For the safety of motor and cables hoist room sensor was repaired and is working normally was constructed at surge shaft. now. DO fuse set of 11 kV feeder at both GIS and

SALIENT FEATURES

Type Run of River hydropower

Project location:

District/Zone Rasuwa & Nuwakot of Bagmati zone

Headworks 1 km downstream of Mailung Trishuli confluence

Powerhouse Near Simle village

Nearest Town Trishuli about 19 km to the south

Nearest Roadhead Simle near proposed powerhouse site

Length of access road 2.3 km new and upgrading of 11.3 km between Betrawati & headworks site

Hydrology:

Name of River Trishuli

32 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 33 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077

Reference Hydrology Betrawati St. no. 447

Catchment area 4542 sq. km

Design Discharge 51 cumecs based on 70% exceedance flow

Geology:

Regional geology Lessar Himalyas

Geology of project area Good rock type, Gneiss, Schist

Gross Head 144.5 m

Type of headworks Gated weir with side intake

Design flood 2424 cumecs based on 1:1000-year flood

Full Supply level El: 870.5 m

Undersluice gate size 4 nos. 11.6 m x 10 m

Intake type Side intake

Intake channel length 148 m

Desander Dufore Type

Desander size 95 m x 37.5 m x 15.84 m (L x B x H)

Headrace tunnel length 4,076 m

Headrace tunnel Shape D type (excavated) and Horse-Shoe (finished)

Headrace tunnel Size 5.4 m for concrete lined and 6m for shotcrete

Shotcrete lined portion 60% of total length

Surge shaft Restricted orifice type 11 m dia. 65.45 m high

Vertical shaft Length 121 m, diameter 4.3 m

Pressure tunnel Length 131.924m, diameter 3.3 m

Powerhouse Type Underground Cavern

Powerhouse Size 56.6 m x 15.6 m x 36.5 m

Turbine:

Type Vertical Francis

Installed Capacity 60 MW (2 X 30 MW)

Annual design generation 489.76 GWh

Switchyard Size 72.5m x 51m

Tailrace Conduit Horse Shoe type 5.6m x 4m size, 162.96 m length and twin conduits 31.44 m length

Tail water Level El. 726 m

Power & Energy:

Minimum power Generation 43.75 MW

Transmission Line 44.7 km, 220 kV initially charged at 132 kV

Interconnection point Matatirtha substation at Kathmandu

Project Cost

Total Project cost 125.78 Million US$

Concessional Loan from The Exim 640 million RMB for Plant Project and Consulting services,

Bank of China:

154 million for Transmission Line Project

NEPAL ELECTRICITY AUTHORITY 33 Generation Directorate 2076/2077 12th Issue, 2077

Total Loan Amount: 794 million RMB

Plant Project Contract Price USD 100.771 million with VAT

Transmission Line Project Contract Price USD 25.532 million with VAT

Consulting Services Contract Price USD 11.434 million with VAT

Project Economics:

Benefit cost ratio 2.18

EIRR 21.60%

Specific energy cost 3.03 cents/KWht

During inaguration of UT3A HEP from Prime Minister office, Singha Durbar

34 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 35 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077 - Ashad 43,625.00 35,122.50 - Jestha 43,625.00 44,590.00

- Baisakh 42,170.00 40,357.50 Ashad 35,122.50 43,625.00 43,625.00 - Chaitra 36,355.00 31,237.50 Jestha 44,590.00 43,625.00 43,625.00 - Baisakh 40,357.50 42,170.00 42,170.00 Falgun 31,185.00 30,482.50 Chaitra 31,237.50 36,355.00 36,355.00 - Magh 33,310.00 33,052.50 Falgun 30,482.50 31,185.00 31,185.00 - Magh Poush 33,052.50 33,310.00 33,310.00 40,650.00 38,417.50 Poush 38,417.50 40,650.00 40,650.00 Month of 2076/077 of Month - Actual Generation (MWh) Mangsir 43,625.00 41,909.75 Mangsir 41,909.75 43,625.00 43,625.00 - Kartik Kartik 39,713.00 43,625.00 43,625.00 43,625.00 39,713.00 Aswin 34,801.00 43,625.00 43,625.00 ENERGY GENERATION SINCE COMMISSIONING SINCE GENERATION ENERGY - ActualGenerationcomparison with Target and DesignedGeneration Aswin 43,625.00 34,801.00 Bhadra 27,443.00 43,625.00 43,625.00 - Bhadra 10,424.40 44,340.00 44,340.00 Shrawan 43,625.00 27,443.00 - Actual Target Designed

- 5,000.00

50,000.00 45,000.00 40,000.00 35,000.00 30,000.00 25,000.00 20,000.00 15,000.00 10,000.00 Energy (MWh) Energy 44,340.00 Shrawan 10,424.40 Total 16,185.60 489,760.00 407,551.15 423,736.75 Year Fiscal 2075/076 2076/077 Total Designed 1 2 S.N.

NEPAL ELECTRICITY AUTHORITY 35 Generation Directorate 2076/2077 12th Issue, 2077

KULEKHANI I HYDROPOWER STATION

INTRODUCTION GWh of energy in FY 2076/77. The maximum water level was recorded as 1527.7 masl on 2076/06/25, Kulekhani –I, located at Dhorsing, Makwanpur is whereas the minimum as 1503.96 masl on the only reservoir type Hydro-electric Power Station 2077/03/01, which raised up to 1510.5 masl on in Nepal. It is situated in Lower Mahabharat Range 2077/03/31. of Makwanpur District, Central region of Nepal at about 30 km to the Southwest of Kathmandu, whereas the Kulekhani Dam itself is located at about 21 km Southwest of Kathmandu. It covers two basins of different river systems i.e. the Kulekhani river basin and the upper Rapti river basin neighboring to south of the Kulekhani river basin. Its installed Capacity is 60 MW with two units of 30 MW each. This station was designed as a peaking power station but it is often operated to the system requirements for voltage improvement & system stability. The

Power Station is designed to generate 165 GWh as Kulekhani reservoir primary energy and 46 GWh as Secondary energy. Currently both the units are in normal operation. The construction started in 1977 with financial Overhauling works have not been performed assistance of the World Bank, Kuwait Fund, OPEC since FY 2066/67. However preventive, corrective Fund and the Overseas Economic Co-operation Fund and scheduled repair and maintenance works are (OECF) of Japan. The first unit was commissioned in performed on regular basis. 14th May 1982 and the power station was inaugurated on 8th December 1982 (B.S. 2039-Marga-23). The REPAIR AND MAINTENANCE ACTIVITIES total cost of the project was US$ 117.843 Million and MECHANICAL MAINTENANCE accordingly the project was transferred to NEA with a capital cost of approximately NRs. 1,550 million. The • Painting of Penstock pipeline from BL No 7 to tele-metering system installed for the measurement BL No 9 area. of rainfall, water level etc. cost around NRs. 137.4 • Repair and maintenance of Radial Spillway million. The cost of road check dams and inclined Gate, Sim Khola Intake Gate and Chakhel Khola tunnel is about 23 crores. In 1994, an overhauling Intake Gate. work of the power station was performed with the • Procurement, installation and replacement grant assistance of Japan. of Cooling Water Pump and procurement of The cumulative generation of Kulekhani-I HPS has Backhoe Loader. reached 5015.996 GWh. The plant generated 162.97 • Total repair, maintenance and servicing of the

36 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 37 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077

Powerhouse Chiller Plant. control house (remote) by installation, testing • Repair and maintenance of Nozzle of Unit No 2. and commissioning of new control and relay panel. • Regular and Periodic Maintenance of Generator and Turbine Oil Coolers, Cooling Water Pump, Compressor, Diesel Generator and Vehicles.

Repair and Maintenance of Nozzle

ELECTRICAL MAINTENANCE

• Installation, testing and commissioning of new 66 kV synchronizing SF6 circuit breaker for Unit no 1 and Unit no 2 and Automatic Synchronizing

Panel in supervision of Fuji Electric Company Replacement of Unit synchronizing breaker Limited, Japan representatives by Kulekhani CIVIL MAINTENANCE First HPS staffs. • Clearance of Chakhel Intake and Waterway Tunnel to regulate flow which was fully blocked by debris due to the massive flood during rainy season. • Construction of different retaining/supporting structure at different access roads, security areas on rock fill dam area to protect additional damage. • Removal of debris from energy dissipation pond below spillway. • Maintenance of compound wall in Markhu Colony area was done. • Construction of compound wall, flooring area Operation of main valve (of valve house) from control room and other necessary areas in Pre-fab building of Staff Colony. • Maintenance of 11 kV Bus bar and Vacuum Circuit Breakers. • Maintenance of water supply system, bathrooms of Markhu guest house and dam control house. • Operation of butterfly valve of valve house from

NEPAL ELECTRICITY AUTHORITY 37 Generation Directorate 2076/2077 12th Issue, 2077

• Maintenance works were done on Valve House road.

Chakhel Intake Debris Removal Works

SALIENT FEATURES

Type Seasonal Storage Location Dhorsing, Makawanpur Installed Capacity 60 MW Annual design generation 211 GWh Rated Head 550m Catchments Area 126km2 Design Discharge 12.1 m3/sec Turbine: No. and Type Two, Vertical Shaft Pelton Rated Output 31 MW Rated Speed 600rpm Generator: Rated Capacity 35 MVA Generating Voltage 11kV Frequency 50 Hz Dam Zoned Rock Fill Dam with Inclined Core, 114m high, 406m crest length Headrace Tunnel Circular Section, Ø 2.5m x 6,233m in length Penstock Ø 2.0-1.5m, 1324m length Main Transformer Two, 35 MVA, 11/66 kV

Monthly Energy Generation Trend of last 3 Years 40,000.00

35,000.00

30,000.00

25,000.00

20,000.00

15,000.00 Generation (MWh)

10,000.00

5,000.00

- Shrawan Bhadra Aswin Kartik Mangsir Poush Magh Falgun Chaitra Baisakh Jestha Ashad FY 2074/75 860.00 313.00 202.00 225.00 202.00 4,345.00 5,283.00 14,322.00 12,845.00 12,669.00 6,428.00 4,437.00 FY 2075/76 4,480.00 2,894.00 2,209.00 1,349.00 2,249.00 5,878.00 5,390.00 2,710.00 13,504.00 20,932.00 16,616.00 12,973.00 FY 2076/77 34,087.00 10,136.00 6,239.00 11,710.00 17,176.00 13,628.00 10,978.00 5,655.00 7,788.00 8,934.00 18,230.00 18,411.00 Months

38 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 39 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077

Actual Generation with Target of FY 2076/77 40,000.00

35,000.00

30,000.00

25,000.00

20,000.00

15,000.00 Energy (MWh) 10,000.00

5,000.00

- Shrawan Bhadra Aswin Kartik Mangsir Poush Magh Falgun Chaitra Baisakh Jestha Ashad Generation 34,087.00 10,136.00 6,239.00 11,710.00 17,176.00 13,628.00 10,978.00 5,655.00 7,788.00 8,934.00 18,230.00 18,411.00 Target 6,244.87 4,309.53 4,767.67 4,024.80 5,443.40 10,099.53 12,824.60 13,644.73 14,906.67 13,654.87 8,016.27 5,989.47 Month of 2076/077

MAXIMUM AND MINIMUM RESERVOIR WATER LEVEL OF LAST 7 FISCAL YEARS

1535 2070/9/20 2071/9/24 2076/3/31 2076/6/25 1530 2072/9/7 2074/9/16 1525 2073/9/10

1520

1515 2071/2/9 2072/3/11 1510 2075/2/28 2076/3/21 2073/2/15 2077/3/1 1505 2074/2/31 1500

1495 WATER WATER LEVEL (MASL) 1490

1485

1480 2070/071 2071/072 2072/073 2073/074 2074/075 2075/076 2076/077 Minimum level 1507.32 1509.77 1502.73 1500.24 1505.33 1505.43 1503.96 Maximum level 1530.98 1530.44 1527.10 1523.67 1524.38 1527.17 1527.70 FISCAL YEAR

MONTHLY GENERATION WITH WATER LEVEL ON 1ST DAY OF MONTH 40,000.00 1,530.00

35,000.00 1,525.00 ) h 30,000.00 1,520.00 ) 25,000.00 1,515.00 masl 20,000.00 1,510.00

15,000.00 1,505.00

10,000.00 1,500.00 WATER LEVEL ( ENERGY GENERATION (MW GENERATION ENERGY 5,000.00 1,495.00

- 1,490.00 Shrawan Bhadra Aswin Kartik Mangsir Poush Magh Falgun Chaitra Baisakh Jestha Ashad Energy generation 34,087.00 10,136.00 6,239.00 11,710.00 17,176.00 13,628.00 10,978.00 5,655.00 7,788.00 8,934.00 18,230.00 18,411.00 Reservoir water level 1,527.21 1,521.86 1,524.03 1,527.48 1,525.32 1,520.94 1,517.22 1,515.34 1,514.90 1,512.53 1,510.86 1,503.96

FY 2076/077

NEPAL ELECTRICITY AUTHORITY 39 Generation Directorate 2076/2077 12th Issue, 2077 - Ashad 5,576.00 5,072.00 5,611.00 7,339.00 4,617.00 2,785.00 4,598.00 6,670.00 4,538.00 9,115.00 5,520.00 6,890.00 10,112.00 16,032.00 15,511.00 15,340.00 13,818.00 12,443.00 10,885.00 19,168.00 17,430.00 10,164.00 12,880.00 - Jestha 372.00 7,958.00 5,527.00 8,316.00 7,262.00 5,082.00 3,352.00 2,486.00 4,367.00 7,649.00 5,717.00 8,070.00 7,189.00 9,578.00 8,448.00 15,866.00 12,914.00 14,037.00 11,219.00 10,929.00 14,195.00 11,336.00 12,322.00 Baisakh 7,240.00 6,573.00 4,424.00 2,098.00 4,562.00 9,847.00 5,554.00 8,026.00 8,533.00 16,411.00 10,607.00 10,608.00 15,848.00 15,971.00 16,402.00 10,019.00 10,598.00 25,476.00 15,781.00 10,996.00 11,864.00 11,148.00 11,986.00 17,813.00 Chaitra 9,256.00 5,902.00 9,750.00 5,329.00 8,803.00 11,023.00 10,261.00 10,263.00 20,453.00 19,206.00 16,487.00 12,139.00 15,798.00 17,423.00 26,664.00 14,542.00 10,124.00 20,205.00 20,815.00 19,588.00 20,027.00 13,435.00 16,577.00 18,940.00 - Falgun 9,342.00 8,275.00 8,331.00 9,911.00 10,932.00 18,999.00 19,250.00 17,068.00 15,431.00 21,002.00 15,286.00 17,296.00 15,651.00 14,488.00 20,735.00 13,610.00 16,867.00 26,755.00 25,096.00 19,134.00 29,963.00 19,540.00 20,983.00 - Magh 12,477.00 11,287.00 10,601.00 18,512.00 17,440.00 19,192.00 15,563.00 10,828.00 27,183.00 19,607.00 12,935.00 19,997.00 17,108.00 15,550.00 26,586.00 15,104.00 18,481.00 26,333.00 24,925.00 21,475.00 30,871.00 19,192.00 23,347.00 - Poush 9,951.00 7,474.00 11,007.00 11,681.00 13,578.00 15,062.00 17,260.00 18,740.00 17,985.00 13,251.00 25,818.00 18,133.00 11,709.00 21,778.00 13,445.00 26,676.00 19,380.00 19,307.00 18,242.00 15,108.00 16,177.00 20,508.00 18,091.00 - - Actual Generation (MWh) 7,462.00 7,518.00 7,756.00 5,064.00 8,314.00 4,436.00 8,098.00 8,106.00 9,566.00 9,223.00 Mangsir 10,020.00 14,462.00 17,825.00 13,273.00 12,011.00 12,254.00 10,551.00 11,499.00 16,612.00 13,204.00 11,962.00 15,161.00 - - Kartik 2,964.00 2,595.00 6,154.00 8,437.00 6,418.00 3,481.00 4,959.00 6,492.00 7,816.00 8,025.00 9,072.00 6,617.00 8,293.00 9,850.00 13,319.00 14,478.00 12,135.00 10,800.00 13,194.00 11,385.00 14,836.00 10,665.00 - - ENERGY GENERATION SINCE COMMISSIONING SINCE GENERATION ENERGY Aswin 4,194.00 3,636.00 4,715.00 9,020.00 8,081.00 4,659.00 7,044.00 8,885.00 12,146.00 14,897.00 17,011.00 16,134.00 11,687.00 11,833.00 14,945.00 16,513.00 13,346.00 21,139.00 16,103.00 14,250.00 11,329.00 11,960.00 - - Bhadra 3,318.00 3,074.00 5,594.00 8,981.00 5,155.00 4,303.00 6,714.00 9,086.00 13,222.00 15,344.00 17,780.00 15,482.00 18,641.00 10,097.00 17,147.00 10,694.00 31,986.00 34,278.00 17,107.00 10,315.00 15,542.00 10,798.00 - 661.00 353.00 5,058.00 9,047.00 3,358.00 7,903.00 7,438.00 6,304.00 9,904.00 7,712.00 9,023.00 Shrawan 12,940.00 17,572.00 15,831.00 16,808.00 17,250.00 10,845.00 15,562.00 33,355.00 10,551.00 12,147.00 10,517.00 16,627.00 Total 27,434.00 87,417.00 82,293.00 71,292.00 104,012.00 174,411.00 190,395.00 198,077.00 170,883.00 132,594.00 163,410.00 117,103.00 107,781.00 113,048.00 167,197.00 167,985.00 121,571.00 195,737.00 249,680.00 175,752.00 145,421.00 170,026.00 160,609.00 173,785.00 2038/039 2039/040 2040/041 2041/042 2042/043 2043/044 2044/045 2045/046 2046/047 2047/048 2048/049 2049/050 2050/051 2051/052 2052/053 2053/054 2054/055 2055/056 2056/057 2057/058 2058/059 2059/060 2060/061 2061/062 Fiscal Year 1 2 3 4 5 6 7 8 9 S. 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 N.

40 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 41 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077 Ashad 474.00 9,045.00 6,361.00 3,610.00 5,682.00 5,598.00 3,864.00 6,363.00 7,243.00 3,604.00 3,109.00 4,437.00 10,589.00 12,973.00 18,411.00 Jestha 7,012.00 9,091.00 4,421.00 5,884.00 6,726.00 3,884.00 3,630.00 5,986.00 2,845.00 6,141.00 6,428.00 10,518.00 22,614.00 16,616.00 18,230.00 Baisakh 6,777.00 9,013.00 3,313.00 6,576.00 8,149.00 8,934.00 14,271.00 17,814.00 10,560.00 20,471.00 24,797.00 18,442.00 13,226.00 12,669.00 20,932.00 Chaitra 5,886.00 2,381.00 9,808.00 7,788.00 15,124.00 21,113.00 11,040.00 17,468.00 25,403.00 27,394.00 15,278.00 13,184.00 14,232.00 12,845.00 13,504.00 Falgun 9,495.00 5,494.00 9,420.00 2,710.00 5,655.00 18,371.00 10,226.00 20,110.00 10,214.00 11,999.00 25,823.00 15,504.00 16,711.00 13,289.00 14,322.00 Magh 6,195.00 8,291.00 9,733.00 9,481.00 5,283.00 5,390.00 17,132.00 20,412.00 23,738.00 10,268.00 12,680.00 13,638.00 16,038.00 10,743.00 10,978.00 Poush 9,594.00 8,683.00 8,608.00 4,539.00 3,732.00 5,776.00 6,253.00 4,345.00 5,878.00 13,560.00 20,838.00 16,467.00 12,487.00 12,642.00 13,628.00 297.00 918.00 202.00 Actual Generation (MWh) 9,062.00 8,412.00 8,295.00 6,612.00 5,545.00 6,866.00 3,958.00 4,051.00 3,642.00 2,249.00 Mangsir 12,319.00 17,176.00 Kartik 716.00 723.00 225.00 5,623.00 6,697.00 8,382.00 2,131.00 4,595.00 3,927.00 8,112.00 1,148.00 2,938.00 3,141.00 1,349.00 11,710.00 79.00 Aswin 464.00 521.00 221.00 256.00 202.00 7,091.00 6,348.00 3,654.00 5,156.00 4,396.00 2,209.00 6,239.00 15,260.00 13,698.00 11.00 187.00 566.00 313.00 Bhadra 7,188.00 7,407.00 5,672.00 8,097.00 4,756.00 3,171.00 7,611.00 2,205.00 3,767.00 2,894.00 10,136.00 39.00 626.00 860.00 7,953.00 8,954.00 3,742.00 4,290.00 9,633.00 7,888.00 4,704.00 9,615.00 3,946.00 4,480.00 Shrawan 10,316.00 34,087.00 Total 75,114.00 86,996.00 98,886.00 92,829.00 94,084.00 90,081.00 71,356.00 73,402.00 62,131.00 91,184.00 114,700.00 138,048.00 153,016.00 143,284.00 162,972.00 5,015,996.00 2062/063 2063/064 2064/065 2065/066 2066/067 2067/068 2068/069 2069/070 2070/071 2071/072 2072/073 2073/074 2074/075 2075/076 2076/077 Total Fiscal Year S. 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 N.

NEPAL ELECTRICITY AUTHORITY 41 Generation Directorate 2076/2077 12th Issue, 2077

KULEKHANI II HYDROPOWER STATION

INTRODUCTION Plant has Generated 81.483 GWh in F/Y 2076/77 which is 77.9% of design generation. Since, the Kulekhani-II Hydropower Station, located at station is cascade of Kulekhani-I HPS, it is operated Bhimphedi Rural Municipality-4, Nibuwatar, as per instructions of Load Dispatch Center (LDC) Makwanpur is a cascade of Kulekhani-I HPS with according to the system requirements for voltage installed capacity of 32 MW and annual design improvement & system stability. generation of 104.6 GWh. It was commissioned in 1986 AD and developed by the financial assistance REPAIR AND MAINTENANCE ACTIVITIES of Government of Nepal and the Overseas Economic Cooperation Fund (ODCF) of Japan at the cost of MECHANICAL MAINTENANCE NRs. 1240 million. Major mechanical works on this period are; The plant is designed to develop power utilizing • Repairing of Control Valve for operating the water from the tailrace of KL-I HPS, further downstream seat ring. adding the water of Mandu River and through • SF6 Gas filling of breaker at power house Rapti pumping station. Every year Mandu Intake switchyard. is cleaned after the wet season to allow the filtered water to the intake pond. Likewise, Rapti Pumping • Procurement of MIV Parts (Proprietary) and Station is operated as per requirement in dry season Blind Flange for maintenance works. by doing effective maintenance works to generate • Repair and Maintenance of Intake gate of Main power. tunnel.

Intake gate of Main Tunnel Generator floor

The cumulative generation of Kulekhani-II HPS has reached 2064.583 GWh till F/Y 2076/77. The

42 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 43 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077

ELECTRICAL MAINTENANCE Maintenance Works. • Construction of Temporary Reservoir on Rapti • Corrosion Resistant Coating on 132 kV live lines Intake which played the major role in increment switchyard Gantry Structures. of the generation. • Operation of Rapti Intake Pump form power house switch. • Transformer maintenance at Rapti intake. • 48 kW & 55 kW Pump Repair and Maintenance at Rapti Intake.

CIVIL MAINTENANCE

• Maintenance of some portions of Guest House &Colony staffs’ quarter. • Surge Tank Protection works (Backfilling work & Retaining Wall) at Surge Tank Area. Excavation work for the construction of temporary Reservoir on • Mandu Dam Protection & Check Wall Rapti Intake

SALIENT FEATURES

Type of Project Cascade plant of Kulekhani I Hydropower / Peaking power station Location Bhimphedi Rural Municipality-4, Nibuwatar, Makawanpur Installed Capacity 32 MW Annual design generation 104.6 GWh Maximum Gross/Net Head 310/284.1m Power Tunnel Dia 2.5m, 5874.8 m Long Penstock 1 No., Steel Pipe, Dia 2.1-1.5m, 843 m Turbine: Number and Type 2, Vertical Francis Turbine Rated Discharge 16.65 m3/s Rated Output 16500 kW Rated Speed 750 rpm Generator: Rated Output 18.8 MVA Rated Voltage 6.6 kV Rated Frequency 50 Hz Power Factor 0.85 lag Excitation Brushless 3 phase rotating armature Power Transformer 37.8 MVA, 132/6.6 kV, 1 No., 3 phase Transmission Line 132 kV, Hetauda Line-7.9 km, Siuchatar Line-33.4 km

NEPAL ELECTRICITY AUTHORITY 43 Generation Directorate 2076/2077 12th Issue, 2077

Monthly Energy Generation Trend of last 3 Years

18,000.00

16,000.00

14,000.00

12,000.00

10,000.00

8,000.00

6,000.00 Generation (MWh)

4,000.00

2,000.00

- Shrawan Bhadra Aswin Kartik Mangsir Poush Magh Falgun Chaitra Baisakh Jestha Ashad FY 2074/75 526.50 185.20 236.90 266.30 280.40 2,350.20 2,727.40 7,151.20 6,523.10 6,364.30 3,051.60 2,091.00 FY 2075/76 2,094.00 1,370.50 1,054.30 701.40 1,156.30 3,030.20 2,753.90 1,359.80 6,440.90 10,043.00 8,124.60 6,547.80 FY 2076/77 16,499.14 5,437.33 3,140.70 5,772.90 8,401.25 6,891.44 5,588.30 2,878.64 3,964.25 4,519.90 9,122.45 9,267.10 Month

Actual Generation with Target of FY 2076/77

18,000.00

16,000.00

14,000.00

12,000.00

10,000.00

8,000.00

6,000.00 Energy (MWh) 4,000.00

2,000.00

- Shrawan Bhadra Aswin Kartik Mangsir Poush Magh Falgun Chaitra Baisakh Jestha Ashad Generation 16,499.14 5,437.33 3,140.70 5,772.90 8,401.25 6,891.44 5,588.30 2,878.64 3,964.25 4,519.90 9,122.45 9,267.10 Target 6,244.87 4,309.53 4,767.67 4,024.80 5,443.40 10,099.53 12,824.60 13,644.73 14,906.67 13,654.87 8,016.27 5,989.47 Month of 2076/077

44 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 45 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077 Ashad 706.50 9,040.10 8,875.50 7,597.00 2,689.80 3,163.90 1,850.50 1,181.00 1,353.50 2,988.20 5,814.40 5,270.40 9,189.40 8,678.00 4,404.60 3,694.20 2,035.10 3,896.00 2,758.30 3,504.70 2,276.55 5,045.12 1,631.73 2,893.35 - Jestha 948.90 6,572.80 6,777.20 5,222.00 3,012.80 1,828.70 1,420.80 3,945.70 2,047.30 6,679.20 5,449.60 3,837.10 6,334.40 2,587.70 3,478.80 2,975.00 3,537.30 3,317.10 2,766.61 3,632.31 5,145.41 2,177.92 2,833.17 825.20 Baisakh 8,188.20 7,871.40 4,555.90 2,693.80 4,162.70 1,797.80 2,155.10 7,820.70 5,347.40 4,694.50 5,990.50 5,740.20 2,660.50 3,759.30 3,786.70 5,118.40 7,634.30 2,755.03 5,453.81 4,192.96 1,633.70 3,448.49 10,506.30 Chaitra 9,407.30 7,827.60 5,433.60 2,496.90 6,482.40 3,750.80 1,880.40 6,809.50 4,265.30 6,981.90 5,017.90 9,664.30 9,721.80 6,333.50 7,506.10 8,237.40 2,376.32 5,604.40 8,280.74 1,217.41 5,408.92 13,190.70 10,488.40 11,027.10 Falgun 9,567.60 8,033.20 6,866.60 3,602.90 8,624.00 6,207.90 3,848.60 6,657.90 7,838.80 7,003.80 6,922.90 8,614.00 2,264.40 9,187.60 8,934.70 9,257.80 8,132.03 4,359.00 5,255.31 5,273.75 5,041.34 10,290.80 13,886.00 14,489.70 Magh 8,606.00 9,023.80 6,880.90 4,592.40 8,134.20 5,038.60 7,447.90 8,447.50 7,592.60 7,617.60 9,525.60 8,488.20 7,638.10 8,938.57 3,964.62 3,226.61 5,022.24 11,354.80 13,210.00 13,560.40 12,478.40 10,879.40 14,674.30 10,352.10 Poush 8,756.50 8,987.40 7,970.40 5,628.50 7,490.10 3,805.20 4,299.60 6,508.40 3,686.00 9,975.90 9,980.10 9,014.50 6,927.30 7,160.20 9,045.10 7,784.90 5,632.66 8,862.73 6,152.70 6,414.22 6,541.80 10,837.40 10,591.90 13,177.20 - Actual Generation (MWh) 5,209.90 8,624.00 5,844.70 5,211.30 4,780.80 4,307.00 1,895.40 5,392.20 3,741.70 7,647.20 2,092.00 6,481.10 6,323.40 6,873.80 3,402.30 3,213.10 3,972.40 3,727.70 3,659.66 4,842.16 2,736.47 4,293.80 3,497.47 Mangsir - - Kartik 7,503.90 5,121.30 4,783.50 5,687.70 2,546.80 1,334.40 2,191.20 2,824.80 5,082.00 3,600.10 3,661.70 6,456.40 3,868.10 2,665.50 2,935.50 3,903.80 4,142.40 2,139.67 2,564.70 2,495.20 1,005.09 2,241.65 - - ENERGY GENERATION SINCE COMMISSIONING SINCE GENERATION ENERGY Aswin 7,860.40 9,002.90 8,788.80 6,619.50 3,737.60 1,973.20 3,030.90 5,419.40 6,796.50 8,061.90 5,955.90 9,467.20 6,908.70 3,369.00 5,734.50 4,229.30 4,740.00 2,616.70 2,276.87 4,883.82 1,657.01 2,434.03 - - Bhadra 6,098.10 4,789.20 2,253.90 1,487.10 8,015.50 4,562.30 2,971.70 7,235.30 4,282.70 6,405.50 3,048.50 3,759.70 2,855.70 2,730.00 1,934.36 3,772.43 2,092.75 11,319.30 10,605.30 10,065.50 15,169.10 15,853.50 - - 2,259.40 3,781.00 3,458.00 1,969.80 4,908.90 4,158.80 3,261.90 7,000.50 3,850.30 4,325.00 4,357.00 3,898.30 6,380.50 3,252.70 3,451.08 1,358.57 4,630.96 2,063.35 Shrawan 10,935.20 10,111.20 10,334.10 15,450.90 Total 65,348.40 85,211.80 63,900.30 71,899.40 49,813.70 28,442.80 41,020.40 52,405.30 79,520.10 77,960.60 58,646.50 95,889.20 71,810.60 65,692.90 74,100.10 65,578.10 72,092.20 47,329.88 54,992.18 51,445.28 36,934.63 43,518.56 103,638.90 122,757.60 2043/044 2044/045 2045/046 2046/047 2047/048 2048/049 2049/050 2050/051 2051/052 2052/053 2053/054 2054/055 2055/056 2056/057 2057/058 2058/059 2059/060 2060/061 2061/062 2062/063 2063/064 2064/065 2065/066 2066/067 Fiscal Year 1 2 3 4 5 6 7 8 9 S. 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 N.

NEPAL ELECTRICITY AUTHORITY 45 Generation Directorate 2076/2077 12th Issue, 2077 Ashad 235.89 2,727.71 1,894.32 2,081.98 3,508.07 1,720.35 1,643.00 2,091.00 6,547.80 9,267.10 Jestha 844.36 3,348.07 2,026.90 3,063.33 1,383.51 3,137.10 3,051.60 8,124.60 9,122.45 11,183.94 643.70 Baisakh 4,132.94 8,913.30 9,308.91 6,831.50 6,364.30 4,519.90 10,162.69 12,197.84 10,043.00 Chaitra 8,700.85 7,643.06 4,743.93 6,606.60 7,367.00 6,523.10 6,440.90 3,964.25 12,473.07 13,621.38 Falgun 6,566.41 7,746.97 8,576.35 2,693.50 4,847.98 6,789.00 7,151.20 1,359.80 2,878.64 13,195.85 Magh 6,529.30 7,047.39 4,208.37 5,074.60 4,763.71 8,214.05 5,387.70 2,727.40 2,753.90 5,588.30 Poush 5,108.52 4,488.72 4,396.20 2,187.53 2,053.90 2,978.27 3,265.20 2,350.20 3,030.20 6,891.44 Actual Generation (MWh) 169.89 618.48 280.40 3,035.70 3,763.92 2,072.20 2,014.89 1,941.80 1,156.30 8,401.25 Mangsir Kartik 585.18 358.62 442.12 266.30 701.40 1,892.44 3,765.23 1,369.02 1,600.46 5,772.90 34.58 78.77 Aswin 213.26 229.81 256.12 236.90 2,016.09 6,577.05 1,054.30 3,140.70 - 88.15 761.29 297.25 185.20 Bhadra 1,477.54 3,531.99 1,754.32 1,370.50 5,437.33 18.90 300.25 526.50 4,932.56 3,770.64 2,467.94 4,258.04 1,760.66 2,094.00 Shrawan 16,499.14 Total 50,468.13 71,448.38 39,642.83 46,569.53 44,740.63 36,055.35 37,795.13 31,754.10 44,676.70 81,483.40 2,064,583.61 2067/068 2068/069 2069/070 2070/071 2071/072 2072/073 2073/074 2074/075 2075/076 2076/077 Fiscal Year Total S. 25 26 27 28 29 30 31 32 33 34 N.

46 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 47 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077

CHAMELIYA HYDROPOWER STATION

INTRODUCTION MECHANICAL MAINTENANCE

Chameliya Hydropower Station (CHEPS), a • Chameliya hydropower Station has observed daily peaking run-off-river (PROR) scheme with numerous trips due to unprecedentedly long an installed capacity of 30 MW is located 950 131 km transmission line upto Attariya. This km west of Kathmandu on Chameliya river, a has caused great challenge to maintain station tributary of Mahakali river, in Shailya-Shikhar operation. Municipality-1, Balanch, Darchula. Generation, • The major repair works of FY 2076/77 were the operation and maintenance works are underway breakdown maintenance. On Baishak 26, 2077 since establishment of station after successful due to unexpected transmission line trip (over inauguration of Chameliyia Hydroelectric Project voltage) created sudden spike and resulted in (CHEP) on 10 February, 2018. failure of DC system in power house which drove the machine to run-away speed. The machines Electricity generation is being done by diverting were instantaneously brought to stoppage water of Chameliya River which is originated from manually. As a result of which, Unit developed Mount Api and flows from Himalaya towards south undue stress, and the unit could not be put into crossing major part of Darchula District finally operation without further repair. Therefore, joining into Mahakali River at Lali, Darchula. It has the excitation housing was dismantled and an installed capacity of 30 MW and designed annual upper and lower guide bearing were inspected; generation of 184.21 GWhr. bearing adjustment were done. The unit was The Powerhouse is located at Shailya-shikhar reassembled, tested and put into operation on Municipality, Ward No. 1, Balanch, Darchula and Jestha 01, 2077, successfully. the Dam site is located between Marma Gaupalika, • Meanwhile, again on Jestha 18, 2077 due to Bitule, Darchula. The site is located 85 km from the another transmission line failure, Unit # 1 was District headquarter, Khalanga, Darchula. subjected to another jerk which caused residual stress on the machine. Abnormal vibration was The cumulative generation has reached 374.695 observed in lower bracket. So, the CHEPS team GWh till the end of FY 2076/77. The total generation added additional stiffeners to lower bracket to during this FY year is 160.882 GWh. subside the vibration. The machine performance increased subsequently. However, frequent REPAIR AND MAINTENANCE ACTIVITIES occurrences of transmission line trip, created additional jerk in the system, which aggravated Since, the Plant is still under the defect liability the vibration in Unit 1. Hence, on 2 Asadh, period of the Contractor, Chameliya Hydroelectric 2077, citing risk in operation, Unit 1 was put to Project and Chameliya Hydroelectric Station are halt, for thorough inspection and repair works. performing repair works in combine. Repair work included replacement of Turbine

NEPAL ELECTRICITY AUTHORITY 47 Generation Directorate 2076/2077 12th Issue, 2077

Guide Bearing (TBN BRG), adjustment of lower Transformer. and upper guide bearing along with aligning the shaft. The repair work included repeated • Repair of 11 kV dedicated line from powerhouse manual operation and adjustment of guide to dam damaged due to landslide. bearing. Finally, the Unit was put to operation • Maintenance of 132 kV transmission line on 23 Asadh, 2077. damaged due to heavy snowfall in Dadeldhura • Mostly during rainy season high concentration Districts. of sediment, debris, leaves, jute pieces etc in the • Continuous repair of 132 kV Circuit Breaker. water causes choking of filter element, which needs to be cleaned on daily basis filters, valves and pipes etc.

Reassembly of Excitation housing of Unit-1

CIVIL MAINTENANCE

• Upgrading and maintaining works of Gokuleshwor-Balanch access road by CHEP. • Removal of slabs in the desander basin canal ditch. • Assessment of damages of Spillway Radial Gate No. 1 for necessary repair works. Replacement work of Turbine Guide Bearing of Unit-1 • Due to high amount of stone and wooden logs • Repair of lifting hoist, of desander basin gate piling in intake trash rack, regular cleaning of No.1 and repair of shaft of gear mechanism of trash rack is being done on regular basis. Spillway Radial Gate No.2 • Completed repair work of Damsite upstream • Installation, testing and commissioning of road, on the left bank of the Chameliya Reservoir by-pass pressure reducing valve (PRV) and Self- en-route to Latinath VDC, which was scoured Cleaning Automatic Cooling Water Filtration due to continuous rainfall and impounding of System in co- ordination with Chameliya Hydo reservoir. Electric Project. WORKS RELATED TO BENEFIT OF LOCAL ELECTRICAL MAINTENANCE PUBLIC

• Installing safety railing in public route of Seri The Project Staff along with the Contractors’ village in upstream of Dam Reservoir area. personnel repaired the leakages of Unit-2 Main

48 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 49 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077

• Continuous cleaning of public drains and local roads blocked due to landslide.

Installing safety railing in public route of Seri village in upstream of Dam Reservoir area.

SALIENT FEATURES

Type Peaking run of river plant (with 6 hr daily peaking) Maximum Gross Head 103.70 m Rated Net Head 94 m Designed Flow 36 m3/sec Installed Capacity 30 MW Dam/Spillway Type Concrete Gravity, 88 m crest length, max. ht. 54 m Intake Side Intake Descending Basin Underground, 2 nos. (LxBxH, 80mx12mx25m) Headrace Tunnel 4067 m, horseshoe size 5.2 (m)/4.2 (m) Surge Tank Restricted Orifice (ht. 48.4 m, dia. 8 m) Penstock Concrete Lined and Steel Lined, Length 302m, dia. 3.9 m Powerhouse Surface, LxWxH, 37.5 m, 23.5 m, 27.4 m Tailrace Box Culvert, LxWXH, 714m, 4.8 m, 3.8 m Turbine 2 Vertical shafts, Francis, rated output 2X15.6 MW, rated speed 428.6 rpm Generator 2/3-phase synchronous, rated output 2x16.2 kVA Switchyard Outdoor, LxB, 57mx 47 m Transmission Line Length 131 km, 132 kV single circuits from Balanch to Attariya Sub-station Annual Average Energy 184.21 GWh

NEPAL ELECTRICITY AUTHORITY 49 Generation Directorate 2076/2077 12th Issue, 2077

Monthly Energy Generation Trend of last 3 Years

25,000.00

20,000.00

15,000.00

10,000.00 Generation (MWh)

5,000.00

- Shrawan Bhadra Aswin Kartik Mangsir Poush Magh Falgun Chaitra Baisakh Jestha Ashad FY 2074/75 ------5,856.48 5,343.07 7,261.59 8,966.13 12292.57 12739.74 FY 2075/76 9,579.47 13,272.40 21,010.62 15,820.60 10,862.10 8,507.10 6,609.75 7,861.39 12,686.36 18,363.55 17908.78 18913.42 FY 2076/77 16,466.11 19,959.74 17,791.00 14,665.78 11,345.54 8,026.22 8,033.88 8,465.86 9,991.30 13,566.42 18667.42 13,832.37 Months

Actual Generation comparison with Target and Designed Generation 25,000.00

20,000.00

15,000.00

10,000.00 Energy (MWh)

5,000.00

- Shrawan Bhadra Aswin Kartik Mangsir Poush Magh Falgun Chaitra Baisakh Jestha Ashad Actual 16,466.11 19,959.74 17,791.00 14,665.78 11,345.54 8,026.22 8,033.88 8,465.86 9,991.30 13,566.42 18667.42 13,832.37 Target 16,353.47 18,111.14 22,173.70 18,338.57 13,202.23 10,081.10 7,903.74 8,261.60 11,387.96 15,925.11 18,626.36 21,072.67 Designed 21,570.00 21,225.00 21,225.00 19,110.00 14,285.00 10,695.00 8,445.00 7,875.00 9,005.00 11,970.00 17,570.00 21,225.00 Month of 2076/077

Chameliya Power House

50 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 51 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077 Ashad 12739.74 18913.42 21,225.00 13,832.37 Jestha 12292.57 17908.78 18667.42 17,570.00 Baisakh 8,966.13 11,970.00 18,363.55 13,566.42 Chaitra 9,005.00 7,261.59 9,991.30 12,686.36 Falgun 7,875.00 5,343.07 7,861.39 8,465.86 Magh 8,445.00 5,856.48 6,609.75 8,033.88 - Poush 8,507.10 8,026.22 10,695.00 Actual Generation (MWh) - Mangsir 14,285.00 10,862.10 11,345.54 - Kartik 19,110.00 15,820.60 14,665.78 ENERGY GENERATION SINCE COMMISSIONING SINCE GENERATION ENERGY - Aswin 21,225.00 21,010.62 17,791.00 - Bhadra 21,225.00 13,272.40 19,959.74 - 9,579.47 21,570.00 Shrawan 16,466.11 Total 52,459.58 184,200.00 161,395.54 160,811.64 374,666.76 2074/075 2075/076 2076/077 Fiscal Year Total Designed 1 2 3 S. N.

NEPAL ELECTRICITY AUTHORITY 51 Generation Directorate 2076/2077 12th Issue, 2077

MULTI- FUEL POWER STATION

INTRODUCTION Wartsila India Pvt. Ltd., India in FY 2018/19.

Multifuel power station is the largest thermal power REPAIR AND MAINTENANCE ACTIVITIES plant in Nepal. It is located in Bansbari Morang, The major maintenance works completed this year Biratnagar, which happens to be one of the largest include; industrial areas in Nepal. In the first phase, 4 units each of 6.5 MW were installed with financial • Installation, testing and commissioning of two assistance from Finland Government in FY 1990/91. sets of 33 kV Outdoor Vacuum circuit breakers, Later, 2 more units of same capacity were installed in 33 kV current transformers and existing 30 kV FY 1997/98 to complement the energy deficit during lightning arrestors at switchyard. winter and evening peak, which was also financed • Upgrading of 33kV/11KV, 6/8 MVA Power by Finland Government reaching the total capacity transformer by replacing with 33kV/11KV, 24 of 39 MW. The project was jointly funded by World MVA in co-ordination with Distribution system Bank under Power Development Project, GON and augmentation and expansion project, Biratnagar NEA. The project cost was USD 7.7 million. division and Biratnagar Distribution Center. • Repair and maintenance of various 11 kV circuit breakers used for industrial feeders, control and protection system for various 11 kV SF6 circuit breakers and 33 kV Outdoor circuit breakers. • Repair & maintenance of main control panel, synchronizing panel and lube oil separator/ heating unit of diesel unit no. 5. • Currently, installation, testing & commissioning of new 11 kV breakers- 5 nos. in newly constructed Fig:- Multifuel PowerPlant Engine (26MW capacity) Breaker switching & control room for industrial A major overhauling of engines of all six units of as well as domestic power consumption is being Multifuel power plant started in FY 2009/10 and a carried out in co-ordination with Distribution contract agreement with Wartsila took place on 10 system augmentation and expansion project, April, 2010. The overhauling of 6x6.5 MW Wartsila Biratnagar Division and Biratnagar Distribution DG sets was successfully completed in 2013. Center. • Construction of boundary wall at north side of The cumulative generation of Multifuel Power Plant D-type staff quarter area. has now reached 593.97 GWh from its first run. Recently, the Condition Evaluation and Assessment work of all the six units (Generator, Engine and their auxiliary equipment) was concluded by M/s

52 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 53 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077

SALIENT FEATURES

Type Thermal (F.O & Diesel Fueled)

Location Bansbari, Morang

Installed capacity 39 MW

Engine set 6 Nos., 6.5 MW

Generator:

Number and type 4 nos. of 7.5 MVA capacity from Leroy Somer France

2 nos. of 8.144 MVA capacity from Alstom, France Rated voltage 11 kV

Rated frequency 50Hz

Rated speed 750 rpm

Excitation Brushless

Power factor 0.85 (4 Units), 0.8 (2 Units)

Power transformer 11/33kV, 16MVA, 3 Nos.

Transmission line 4 km long, 33 kV Double circuit

Monthly Energy Generation Trend of last 3 Years 0.80

0.70

0.60

0.50

0.40

0.30

Generation (MWh) 0.20

0.10

- Shrawan Bhadra Aswin Kartik Mangsir Poush Magh Falgun Chaitra Baisakh Jestha Ashad FY 2074/75 ------FY 2075/76 ------FY 2076/77 - 0.60 - 0.34 0.18 - - 0.70 - - - 0.70

Months

NEPAL ELECTRICITY AUTHORITY 53 Generation Directorate 2076/2077 12th Issue, 2077 ------4.42 4.20 24.24 Ashad 709.27 134.00 526.99 430.13 430.16 940.64 639.81 468.30 2,856.53 3,100.35 2,321.81 1,490.95 3,987.97 4,585.90 4,172.33 - - - 4.24 6.94 52.27 79.00 Jestha 660.52 264.32 141.44 489.34 329.76 774.38 307.17 131.04 225.08 3,222.88 3,620.09 6,301.35 3,195.60 3,874.06 1,412.22 1,351.56 10,502.73 - - - 59.68 60.02 163.19 402.29 741.33 332.07 645.43 476.01 588.71 Baisakh 3,932.12 3,635.07 8,266.18 1,050.54 2,564.10 2,344.15 5,602.40 1,826.36 1,098.84 1,965.33 1,009.27 10,903.60 - - 964.37 865.19 293.91 751.62 703.45 108.73 325.72 Chaitra 5,937.62 7,347.53 8,467.92 1,617.98 3,384.78 9,584.85 6,035.13 6,390.17 1,224.35 1,493.71 1,625.27 1,282.05 2,920.66 1,156.51 13,771.55 - - - - 24.83 758.76 878.97 530.75 530.34 Falgun 4,596.45 6,585.82 8,958.52 1,105.55 4,305.79 9,844.27 1,512.48 2,332.11 1,648.62 1,827.91 1,370.55 2,227.10 1,291.11 10,078.38 13,648.86 - - 2.71 27.48 Magh 775.26 223.30 719.56 902.63 4,857.69 5,241.31 9,802.40 4,737.23 1,062.50 9,783.25 8,263.59 1,603.82 2,479.31 1,088.70 1,241.72 1,954.24 1,149.06 1,005.71 2,466.54 14,140.34 - - 4.80 Poush 512.26 766.89 634.85 663.65 234.02 392.02 5,057.84 5,925.97 7,541.43 6,318.72 1,055.30 9,942.32 7,707.28 9,667.74 2,037.67 2,693.64 2,063.71 1,983.65 1,090.76 1,035.61 1,317.06 - - 9.00 42.22 484.02 623.12 534.83 980.28 331.11 622.65 781.68 118.18 2,096.50 5,192.86 9,868.98 4,325.42 1,291.98 6,628.37 4,866.75 3,641.33 1,550.14 1,493.08 1,042.37 1,485.95 Mangsir Actual Generation (MWh) - - 43.92 22.06 Kartik 679.69 522.12 105.12 635.49 283.20 432.39 728.76 227.97 803.50 301.23 127.32 3,477.92 5,811.13 3,094.18 1,602.48 3,587.63 4,074.81 1,542.03 1,076.86 1,092.83 ENERGY GENERATION SINCE COMMISSIONING SINCE GENERATION ENERGY - - - - 5.75 Aswin 556.22 868.73 789.95 440.32 292.06 582.70 899.62 530.24 819.13 119.68 914.50 4,159.63 2,921.34 2,330.85 1,382.90 8,306.28 3,845.79 2,511.73 1,282.43 - - - 2.60 2.92 23.64 79.67 76.12 823.41 645.63 540.11 933.33 780.24 756.86 Bhadra 1,416.56 4,432.39 2,767.38 2,451.07 6,293.95 1,408.49 1,988.65 1,214.29 1,243.02 1,031.13 - - - - - 5.74 65.97 941.10 963.09 637.68 726.36 963.89 443.35 566.76 397.98 661.12 1,111.03 3,943.40 3,237.66 1,078.75 3,063.08 6,297.44 1,529.63 2,099.25 Shrawan Total 268.20 932.79 4,149.17 8,742.88 7,866.39 5,322.37 9,702.65 2,348.86 9,954.28 4,981.43 20,249.43 36,321.13 56,662.34 76,266.10 28,634.10 29,347.55 85,663.67 86,215.07 53,317.61 19,310.18 13,652.54 11,142.48 12,588.02 10,292.90 2047/048 2048/049 2049/050 2050/051 2051/052 2052/053 2053/054 2054/055 2055/056 2056/057 2057/058 2058/059 2059/060 2060/061 2061/062 2062/063 2063/064 2064/065 2065/066 2066/067 2067/068 2068/069 2069/070 2070/071 Fiscal Year 1 2 3 4 5 6 7 8 9 S. 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 N.

54 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 55 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077 - - - - - 0.70 Ashad ------Jestha ------Baisakh - - - - - 22.66 Chaitra - - - - - 0.70 Falgun ------Magh ------Poush - - - - - 0.18 Mangsir Actual Generation (MWh) - - - - - 0.34 Kartik ------Aswin - - - - - 0.60 Bhadra ------Shrawan - - - 2.52 Total 22.66 15.78 593,973.10 2071/072 2072/073 2073/074 2074/075 2075/076 2076/077 Fiscal Year Total S. 25 26 27 28 29 30 N.

NEPAL ELECTRICITY AUTHORITY 55 Generation Directorate 2076/2077 12th Issue, 2077

MEDIUM GENERATION OPERATION AND MAINTENANCE DEPARTMENT

INTRODUCTION from the hydropower generating stations under this department on FY 2076/77 is 436.668 GWh and has Medium Generation Operation and Maintenance achieved an increment of 6.69 % generation as compared Department (MGO&MD), headed by Director, is to previous fiscal year. Rehabilitation project ongoing responsible for the operation and maintenance of under this department is Trishuli with GON funding thirteen (13) hydropower stations and one (1) diesel and Tinau and Sundarijal with loan assistance from the power plants with individual installed capacity below Asian Development Bank (ADB) under Energy Access 30 MW owned by NEA. It has always strived to uphold and Efficiency Improvement Project (EAEIP). economy, operational efficiency and an acceptable The following sections provide a concise description level of reliability in its drive for improvement. The of the power stations and highlights major activities total installed capacity of 13 hydropower stations and carried out under this department during the Fiscal 1 diesel power plant with indivisual installed capacity year. below 30 MW is 122.7 MW. The actual generation

THPS as viewed from opposite bank of Trishuli River

56 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 57 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077

TRISULI HYDROPOWER STATION

INTRODUCTION

Trishuli Hydropower Station is constructed on the banks of Trishuli River at Trishuli Bazar, Nuwakot. It was commissioned in 1967 AD in assistance with the Government of India at a cost of INR 140 million with its initial installed capacity of 21 MW having 7 units of 3 MW each. It was later rehabilitated in 1995 AD and upgraded to 24 MW with 6 units each 3.5 MW and one unit 3 MW. It is a peaking run-of-river plant with peaking capacity of 21 MWh and annual design generation of 163 GWh. The cumulative generation of THPS since its first run has reached 5,445.62 GWh of which 138.964 GWh has been generated in FY 2076/77. The energy generation in this year is 79.12 % of design generation and 92.81% of generation target.

The Electro-Mechanical Renovation and Modernization works of Trishuli Hydropower Penstock after Painting Station is in progress. Recently, the contract has been awarded at price in Euro. 3,367,424.46 and NRs. ELECTRICAL MAINTENANCE 9,63,26,000.00 on 26th May, 2020 AD (BS 2077/02/13) and contract effective date started from 26th June,2020 • Installation of new transformer at desander AD with 30 months of completion period. • Repair and maintenance of 3 distribution REPAIR AND MAINTENANCE ACTIVITIES transformers.

MECHANICAL MAINTENANCE

• Overhauling of unit no.6 • Repair of MIV of unit 6 with replacement of bushing and seals • 4 no.s of penstock has been painted in this FY. • Gate maintenance was done by replacing spindle of one of the inlet gates in de-sander that was damaged in past Repair and Maintenance of Chilime Line CT

NEPAL ELECTRICITY AUTHORITY 57 Generation Directorate 2076/2077 12th Issue, 2077

• Repair and Maintenance of Trishuli-Chilime CIVIL MAINTENANCE Breaker. • Replacement of TOD Meters and installation of • Protection Fencing work at the canal area AMR/AMI system • Partial cleaning of B-0 opening and reservoir • Repair and Maintenance of CT and power • Powerhouse access road maintenance works Transformers • Repair and renovation of Staff dormitory • Installation of 3 CCTV camera at desander and forebay • Line stringing works at balancing reservoir and installation of street lights

SALIENT FEATURES

Type Peaking-run-of-river Location Trishuli, Nuwakot Installed capacity 24MW (peaking capacity 21MW) Annual average energy 163 GWh Maximum gross head / Net head 51.4 m Catchment area 2600km2 Minimum annual flow 45.66 m3/s Dam 139.6m length Total length of the waterways 4,792m 71.66m long, Ø 2.3m, 3 Nos., steel lined Penstock 89m long, Ø 1.5m, 1 No.s, steel lined Turbine: Number and Type 7, Francis Rated discharge 7.8 m3/s Rated output 3,620 kW Rated speed 500 rpm Generator: Rated output 3889 kVA Rated voltage 6.6 kV Rated frequency 50 Hz Power factor 0.9 Transmission line 66 kV, 27.36 km, Double circuit

Monthly Energy Generation Trend of last 3 Years 14,000.00

12,000.00

10,000.00

8,000.00

6,000.00

4,000.00 Generation (MWh) 2,000.00

- Shrawan Bhadra Aswin Kartik Mangsir Poush Magh Falgun Chaitra Baisakh Jestha Ashad FY 2074/75 10,953.50 9,649.00 10,999.80 12,007.90 11,326.50 9,556.30 8,501.50 8,418.30 9,022.40 9,873.00 10,528.00 10,387.00 FY 2075/76 8,735.30 11,158.70 10,446.10 10,652.50 11,178.70 9,867.80 10,069.00 9,732.50 9,840.00 9,044.10 11,487.60 11,528.60 FY 2076/77 11,785.40 10,143.00 11,120.72 11,804.85 11,817.37 10,895.38 9,975.67 9,352.41 9,202.63 10,723.94 11,515.92 10,635.82 Months

58 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 59 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077 - Ashad 9,403.32 5,949.79 8,704.70 9,373.61 9,143.23 8,879.30 8,670.32 9,014.07 15,000.00 - Jestha 8,396.09 6,683.88 8,328.35 9,107.90 9,219.78 9,184.45 8,421.48 8,536.88 15,000.00 -

Baisakh 8,092.80 7,154.83 8,736.65 9,114.78 8,126.28 9,202.39 6,348.63 8,858.64 15,000.00 Ashad 10,635.82 12,567.15 15,000.00 - - Chaitra 8,278.73 6,508.15 6,761.47 8,805.34 9,260.01 7,977.77 8,083.65 10,000.00 Jestha 11,515.92 12,695.47 15,000.00 - - Falgun Baisakh 7,999.08 6,341.39 6,202.30 8,660.71 9,101.48 7,660.63 7,955.11 10,723.94 11,158.06 15,000.00 10,000.00 Chaitra 9,202.63 10,038.43 10,000.00 - - Magh 7,616.40 8,501.50 8,230.85 8,250.32 8,501.65 7,462.77 8,093.61 10,800.00 Falgun 9,352.41 9,602.87 10,000.00 - - Magh Poush 9,975.67 10,019.27 10,800.00 7,958.23 8,011.07 8,155.30 8,955.16 8,545.92 6,938.50 8,156.24 13,000.00 Poush Month of 2076/077 10,895.38 11,158.06 13,000.00 - - Actual Generation (MWh) 7,226.77 7,832.35 8,074.15 8,991.59 8,893.20 8,203.52 8,695.60 Mangsir 15,000.00 Mangsir 11,817.37 12,583.05 15,000.00 - - Kartik Kartik 6,023.96 6,398.16 8,720.15 9,336.48 9,276.30 9,006.38 9,698.40 11,804.85 12,670.13 15,000.00 15,000.00 Aswin 11,120.72 12,283.88 15,000.00 ENERGY GENERATION SINCE COMMISSIONING SINCE GENERATION ENERGY - - Aswin 6,699.17 7,551.82 9,411.34 9,580.49 9,305.25 8,450.87 9,737.60 15,000.00 Actual Generation comparison with and Target Designed Generation Bhadra 10,143.00 12,394.39 15,000.00 - - Bhadra 8,305.88 5,995.40 9,247.21 8,667.80 9,220.45 8,584.09 9,255.42 11,785.40 11,793.41 15,000.00 Shrawan 15,000.00 - Actual Target Designed - - 8,000.00 6,000.00 4,000.00 2,000.00 16,000.00 14,000.00 12,000.00 10,000.00

9,216.76 5,033.73 8,794.05 8,898.62 9,682.14 8,455.35 9,010.73 15,000.00 Shrawan Energy (MWh) Energy Total 25,892.21 89,113.48 87,943.27 96,180.31 163,800.00 101,193.11 106,635.80 109,052.54 105,095.95 1,155,949.32 Year Fiscal 2024 to 2039/040 2040/041 2041/042 2042/043 2043/044 2044/045 2045/046 2046/047 2047/048 Designed 1 2 3 4 5 6 7 8 9 S.N.

NEPAL ELECTRICITY AUTHORITY 59 Generation Directorate 2076/2077 12th Issue, 2077 Ashad 9,539.02 9,557.91 7,651.82 9,625.64 2,928.80 8,991.70 8,914.50 8,569.10 15,000.00 14,128.89 12,994.00 12,112.65 12,788.10 10,411.30 11,821.50 12,361.05 10,121.00 10,750.00 12,050.60 12,993.20 12,666.90 10,239.60 11,242.40 10,910.10 10,881.90 10,124.00 10,812.00 10,387.00 11,528.60 10,635.82 Jestha 9,545.92 9,665.99 1,843.18 6,882.01 2,629.07 8,948.25 9,530.50 9,253.00 15,000.00 14,219.92 14,512.10 12,750.48 14,166.70 12,057.60 12,085.90 13,720.00 11,649.70 12,318.80 12,132.40 12,655.90 12,780.30 13,316.90 12,657.70 11,333.10 10,278.00 12,143.90 11,474.30 10,528.00 11,487.60 11,515.92 - Baisakh 9,336.16 9,774.50 8,517.05 8,555.40 9,364.00 4,283.80 9,505.20 9,873.00 9,044.10 15,000.00 12,447.67 13,095.60 11,827.97 13,135.92 12,853.60 10,576.35 11,328.45 12,382.00 10,479.30 12,656.40 11,773.00 10,933.60 11,795.00 10,976.50 10,063.10 11,047.80 11,800.80 11,230.50 10,723.94 Chaitra 8,014.75 8,122.35 5,220.65 8,657.85 9,837.85 9,863.35 9,869.00 9,834.80 9,550.70 9,101.30 8,751.60 9,644.30 7,446.10 9,767.10 7,402.00 8,348.80 9,022.40 9,022.40 9,840.00 9,202.63 10,000.00 10,779.29 10,789.94 11,735.15 10,676.80 11,210.50 10,867.70 11,206.40 10,240.50 10,873.60 Falgun 8,335.12 8,565.50 7,888.45 7,404.43 9,659.45 8,565.63 9,899.70 9,765.90 9,485.80 9,362.60 9,755.10 9,272.10 9,071.40 9,489.60 8,930.20 8,026.20 7,974.60 8,627.20 8,278.30 7,159.00 9,362.90 8,065.70 9,153.00 8,418.30 9,732.50 9,352.41 10,000.00 10,522.56 10,850.76 10,234.20 Magh 8,647.70 8,621.42 8,684.23 6,767.30 8,174.30 9,882.20 9,876.00 8,736.90 9,840.10 8,961.30 8,644.00 8,626.10 8,414.50 7,996.90 8,701.70 8,852.40 9,570.70 8,501.50 9,975.67 10,800.00 11,405.89 11,616.75 10,959.25 11,219.75 10,107.00 10,565.00 10,700.40 10,159.20 10,474.20 10,069.00 Poush 9,737.00 9,353.58 7,776.40 2,480.80 8,289.30 9,687.20 9,736.10 9,556.30 9,867.80 13,000.00 12,760.04 12,920.50 12,918.35 14,175.85 11,423.00 11,196.40 11,666.25 11,610.85 10,886.00 11,597.00 10,950.30 12,844.90 10,287.10 11,224.90 10,455.30 11,262.60 11,229.50 10,905.00 10,950.50 10,895.38 - Actual Generation (MWh) 9,056.52 9,161.10 9,452.25 7,999.70 9,772.60 6,594.85 8,972.50 Mangsir 15,000.00 12,446.38 13,394.20 14,212.15 13,690.00 13,235.00 12,056.80 12,593.50 11,645.90 11,057.80 10,126.60 11,848.20 10,631.50 12,665.40 11,988.80 10,094.20 11,645.60 11,766.60 11,523.00 11,326.50 11,178.70 11,817.37 - Kartik 8,399.25 9,637.75 9,883.05 7,708.50 9,694.20 6,878.50 4,697.70 6,990.50 7,990.10 9,709.40 15,000.00 10,438.66 14,004.20 14,216.60 13,865.75 13,843.00 10,075.90 11,041.20 10,264.40 11,646.80 11,248.70 13,358.50 11,866.00 12,208.50 12,133.10 11,345.60 12,007.90 10,652.50 11,804.85 Aswin 795.81 8,298.65 9,412.65 9,872.20 9,398.04 7,612.70 7,726.85 3,676.90 8,906.60 6,677.70 9,723.00 15,000.00 13,381.80 14,044.40 13,477.21 13,074.50 10,506.85 11,493.20 11,388.90 11,784.20 12,577.30 11,976.10 11,856.40 11,014.20 11,985.90 11,806.10 10,322.60 10,999.80 10,446.10 11,120.72 Bhadra 7,956.71 9,372.06 7,574.64 8,621.61 6,480.30 8,896.70 4,435.60 9,099.20 9,398.20 9,826.30 9,158.60 9,649.00 15,000.00 10,000.67 12,545.84 14,074.03 13,196.64 13,680.40 11,620.15 12,126.40 11,184.10 12,415.50 12,061.50 12,732.20 11,939.10 10,975.55 11,495.60 10,154.50 11,158.70 10,143.00 8,210.84 9,340.72 9,787.13 8,042.30 8,614.36 6,699.70 9,087.30 8,197.70 9,601.60 9,675.30 9,557.50 8,735.30 15,000.00 Shrawan 14,318.06 14,069.77 11,497.55 14,472.80 10,934.30 11,811.70 10,427.35 11,281.80 12,562.00 11,091.60 12,251.90 10,315.50 10,470.55 12,770.20 10,409.90 10,953.50 11,785.40 Total 88,060.03 66,747.83 96,900.10 163,800.00 105,077.64 110,585.53 135,783.31 154,423.75 133,274.99 109,367.03 151,507.65 141,558.90 128,238.10 117,646.30 122,944.60 134,463.45 129,025.85 133,391.10 114,938.80 135,302.50 128,247.00 134,772.80 124,776.20 111,846.80 124,763.40 125,025.70 125,969.00 121,223.20 123,740.90 128,973.11 5,435,631.56 Year Fiscal 2048/049 2049/050 2050/051 2051/052 2052/053 2053/054 2054/055 2055/056 2056/057 2057/058 2058/059 2059/060 2060/061 2061/062 2062/063 2063/064 2064/065 2065/066 2066/067 2067/068 2068/069 2069/070 2070/071 2071/072 2072/073 2073/074 2074/075 2075/076 2076/077 Total Designed 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 S.N.

60 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 61 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077

DEVIGHAT HYDROPOWER STATION

INTRODUCTION problem from shaft seal for which maintenance work are carried out to minimize the leakage by effective Devighat Hydropower Plant is a cascade sealing but the maintenance of groove formation in development of Trishuli Hydropower Plant with sleeve is needed. Our upcoming days will be focused installed capacity of 14.1 MW and annual design on problems solving mentioned. Currently no spare generation of 114 GWh. It is located at Devighat, runner is available, procurement of spare runner is Nuwakot and was commissioned in 1984 AD. in process. Improved operational performance is observed after successful completion of renovation, modernization and upgrading (RMU) in 2010/2011. The capacity of the units was improved and upgraded to 15MW. The cumulative generation since its first run has reached 3060.175 GWh in FY 2076/77 The actual generation of year 2076/77 is 92.053 GWh which is 80.75 % of annual design generation and 94.17% of generation target.

PRESENT STATUS

All Units are in normal operation but Governor and SCADA system need repair and maintenance which will be carried out by suitable experts in next fiscal year. Spare Turbine excessive leakage was minimized by using proper turbine shaft seal but the groove formation in the shaft sleeve causing inevitable leakage will be repaired during the period Overhauling of unit no: 3 of overhauling in the coming fiscal year. Devighat power house is facing problems in SCADA Problems are seen in turbine bearing coolers, thrust system and have planned to solve the problem with bearing coolers and generator air coolers due to the help of experts. leakage through pipe causing intermixing of oil and water. Escape gate being too old, lots of deformation Governor system is not functioning properly are seen in shafts and its mechanical structures therefore needs to be repaired or replaced with new followed by excessive leakages, civil and mechanical governor system only after condition monitoring by structures of escape gate should be repaired as soon an expert will be decided. Surge Arrestor and old as possible. Problem is also depicted in sluice gates instrument Transformer in the switchyard need to which is operated manually and motorization of these be replaced. gates will be done in coming year. Water leakage

NEPAL ELECTRICITY AUTHORITY 61 Generation Directorate 2076/2077 12th Issue, 2077

REPAIR AND MAINTENANCE ACTIVITIES • Accuracy measurement of Unit no 3 Current transformer. MECHANICAL MAINTENANCE • Checking and maintenance of Excitation system and governor system for unit no 3 • Overhauling of Unit No.3. • Tightening up the control cable to the panel • Repair of runner, top cover. (unit no.3) • Replacement of 66 kV bus coupler SF6 breaker • Maintenance and replacement of rubber seals of with new breaker escape gate. • Replacement of 33kV Current Transformer for • Installation of new Bypass valve and replacement Dhading Feeder of old cooling pipelines. • Installation of 33 kV VCB breaker for Dhading • Maintenance of Sluice Gates, Intake Gates, Feeder. Forebay Gates. • Repair of damaged 33kv cable for Dhading • Repair of Governor System. feeder. • Repair &Maintenance of bypass valve of unit • Unit 1 SCADA system Fault identification and No. 1 diagnose • Upgradation of dewatering & drainage system • Replacement of 66 kV Lightening Arrestor to its optimum capacity and also Overhead crane from manual to wireless system. • Installation of new submersible Slurry Pump in forebay for removal of debris and silt deposited. • Replacement of turbine shaft seal • Replacement of turn buckle and pin with check plate of guide vanes • Replacement of old oil cooling pipelines

Replacement of 66kv Lightening Arrestor

CIVIL MAINTENANCE

• Removing of Debris from canal and trash rack, Cleaning of drain, bush cutting etc. • Repair and maintenance of of Samari Khola Runner repair work Syphon. ELECTRICAL MAINTENANCE • Construction New Building for J.D Boardig School • During overhauling of Unit 3 Visual inspection • Water diversion work at Samari Khole to of generator and Cleaning of dust to increase the increase discharge . IR value of Stator winding and rotor winding for • Construction of new store building. unit no 3.

62 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 63 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077

SALIENT FEATURES

Type Cascade of Trishuli Hydro Power Station Location Charghare, Bidur Municipality-06, Nuwakot District Installed capacity 15 MW (after rehabilitation) Annual design generation 114 GWh Maximum gross head / Net head 40.5m, 39m Catchment area 4150 km2 (upto Trishuli diversion) Average annual flow 45.3 m3/s Net head 40.5m, 39m Total length of the waterways 4.5 km from Trishuli HPS tailrace to Devighat HPS forebay Penstock 3 Nos., Ø2.5m, steel lined Turbine: Number and Type 3, Vertical Francis Rated discharge 14.3m3/sec Rated output 5.03MW Rated speed 333.3rpm Generator: Rated output 5MW Rated voltage 6.6kV Rated frequency 50Hz Power factor 0.8 Power transformer 6.3MVA, 6.6/66kV, 3-phase, 3 Nos. Transmission line 66kV, 37km(Devighat -Chabel), 28km(Devighat - Balaju), Double circuit

Monthly Energy Generation Trend of last 3 Years 10,000.00 9,000.00 8,000.00 7,000.00 6,000.00 5,000.00 4,000.00 3,000.00 Generation (MWh) 2,000.00 1,000.00 0.00 Shrawan Bhadra Aswin Kartik Mangsir Poush Magh Falgun Chaitra Baisakh Jestha Ashad FY 2074/75 7,824.09 6,707.18 8,294.65 8,827.25 8,431.31 7,041.39 6,389.00 6,236.40 6,753.05 7,166.19 7,327.03 5,241.25 FY 2075/76 6,024.84 7,558.92 7,294.98 7,844.55 6,268.39 7,362.30 7,371.98 7,076.75 7,226.96 6,523.64 8,302.23 7,995.60 FY 2076/77 8,420.09 7,303.76 7,907.87 8,631.96 8,863.56 8,058.64 7,359.52 6,832.15 6,809.92 6,916.73 7,333.49 7,615.45 Months

Actual Generation comparison with Target and Designed Generation 12,000.00

10,000.00

8,000.00

6,000.00

4,000.00 Energy (MWh)

2,000.00

0.00 Shrawan Bhadra Aswin Kartik Mangsir Poush Magh Falgun Chaitra Baisakh Jestha Ashad Actual 8,420.09 7,303.76 7,907.87 8,631.96 8,863.56 8,058.64 7,359.52 6,832.15 6,809.92 6,916.73 7,333.49 7,615.45 Target 8,216.46 7,810.11 8,562.95 9,089.73 8,643.05 8,389.44 7,646.21 7,201.36 7,086.03 8,047.13 8,867.26 8,189.58 Designed 9,698.49 9,282.61 9,781.22 10,115.50 9,942.53 9,784.93 8,302.80 7,929.73 8,933.96 9,694.26 10,340.96 9,193.02 Month of 2076/077

NEPAL ELECTRICITY AUTHORITY 63 Generation Directorate 2076/2077 12th Issue, 2077 Ashad 9,193.02 3,305.00 3,607.52 5,287.40 6,138.69 5,887.09 6,065.98 6,233.16 6,630.31 7,082.58 7,029.51 4,486.90 6,820.80 7,137.23 9,242.46 2,037.92 7,564.80 7,927.47 1,967.55 7,335.94 7,343.20 5,142.95 Jestha 4,158.25 4,225.15 5,168.85 6,054.55 6,435.76 6,855.79 6,250.43 6,383.29 6,618.47 7,082.96 1,257.78 5,090.82 8,472.17 2,043.15 9,380.70 8,789.25 6,267.33 8,495.65 6,997.25 10,340.96 10,396.57 10,113.85 - 9,694.26 3,399.32 4,420.62 5,610.56 6,077.45 5,805.55 6,967.96 4,724.78 6,659.40 6,769.75 7,381.01 6,564.88 8,798.26 9,460.45 8,957.46 9,746.40 9,602.33 7,254.60 8,311.08 8,846.42 7,775.23 Baisakh Chaitra 8,933.96 3,112.98 5,458.69 4,245.29 2,795.79 6,414.62 7,122.62 5,922.57 6,061.39 6,020.70 6,256.12 3,731.02 6,593.95 7,975.08 7,948.96 8,583.53 7,287.66 7,927.17 7,058.90 8,188.10 7,958.52 7,192.51 Falgun 7,929.73 3,435.40 5,164.83 3,358.16 6,670.70 6,247.78 6,914.63 5,933.01 6,096.91 6,029.70 6,435.60 6,098.70 5,594.70 7,673.56 7,660.01 7,113.85 6,652.19 7,009.48 7,364.28 7,055.80 6,933.63 6,918.61 Magh 8,302.80 3,499.70 4,917.68 4,653.82 5,565.48 6,038.65 6,532.72 5,820.13 6,018.15 6,254.30 6,444.25 6,709.90 5,139.40 8,250.20 7,936.87 8,068.10 6,450.30 8,347.45 7,403.29 7,258.00 7,121.79 7,167.20 Poush 9,784.93 3,222.40 5,078.60 5,545.74 5,661.14 6,591.94 6,509.43 5,253.66 6,264.77 6,875.76 7,150.55 5,836.70 1,596.15 9,138.85 8,990.90 9,301.35 6,231.39 9,837.55 8,308.50 8,115.50 8,367.06 8,436.55 - 9,942.53 1,992.20 4,389.40 4,781.25 5,715.19 6,505.83 6,569.77 6,116.67 6,528.58 6,397.64 6,751.20 7,231.70 8,870.19 9,301.43 9,871.59 5,536.54 9,322.21 9,996.00 8,365.30 7,082.90 4,690.30 Mangsir Actual Generation (MWh) - Kartik 3,804.30 3,925.10 2,982.13 5,619.71 6,728.55 6,711.29 6,871.90 7,139.80 6,129.58 7,434.90 7,584.10 7,388.81 9,254.30 9,889.06 5,481.32 9,594.15 9,746.13 7,108.15 4,651.30 3,263.53 10,115.50 590.59 ENERGY GENERATION SINCE COMMISSIONING SINCE GENERATION ENERGY Aswin 9,781.22 2,625.00 4,222.80 3,294.55 5,812.12 6,442.38 6,496.47 6,248.65 7,022.45 5,989.42 6,921.47 7,338.35 6,855.78 8,067.25 9,833.82 5,201.62 9,417.09 9,133.67 7,500.63 5,230.75 2,491.75 Bhadra 9,282.61 2,835.10 3,935.55 3,495.73 5,271.85 5,131.31 5,993.43 6,047.44 6,513.77 5,736.05 5,762.08 6,689.97 5,532.31 6,142.87 7,010.48 9,332.53 4,374.84 9,125.60 9,290.38 8,188.30 5,983.25 2,962.26 - 125.20 9,698.49 3,144.52 5,385.18 5,214.46 6,217.51 6,074.70 6,335.16 5,809.95 6,633.95 7,028.48 5,673.60 6,105.50 6,427.67 9,743.00 4,674.48 8,053.35 9,750.65 7,831.52 6,304.05 5,543.22 Shrawan Total 35,389.65 49,471.14 51,568.00 66,767.85 73,443.92 78,957.60 71,497.10 77,653.98 75,713.90 81,283.60 63,993.60 49,197.20 92,808.50 94,775.36 78,582.24 96,063.20 91,525.65 84,318.52 68,581.36 113,000.01 101,697.35 106,277.70 2040/041 2041/042 2042/043 2043/044 2044/045 2045/046 2046/047 2047/048 2048/049 2049/050 2050/051 2051/052 2052/053 2053/054 2054/055 2055/056 2056/057 2057/058 2058/059 2059/060 2060/061 Fiscal Year Designed 1 2 3 4 5 6 7 8 9 S. 10 11 12 13 14 15 16 17 18 19 20 21 N.

64 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 65 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077 Ashad 9,193.02 8,360.90 8,643.55 7,386.25 4,642.45 8,040.75 8,987.70 7,992.00 7,802.60 8,650.03 8,276.56 8,448.39 7,536.06 8,138.38 5,241.25 7,995.60 7,615.45 Jestha 9,611.80 8,223.40 9,040.15 8,771.50 8,292.25 8,787.60 6,659.83 9,736.30 8,933.89 8,334.85 7,896.04 7,320.90 8,556.50 7,327.03 8,302.23 7,333.49 10,340.96 9,694.26 6,084.75 8,493.60 8,061.30 8,204.65 6,444.45 7,934.70 6,478.20 9,139.90 9,253.84 7,725.01 3,459.96 8,094.56 8,339.48 7,166.19 6,523.64 6,916.73 Baisakh Chaitra 8,933.96 6,400.75 7,070.10 8,056.30 6,314.60 6,586.55 7,006.75 6,083.10 8,425.90 8,135.84 6,468.00 8,982.01 7,158.64 6,876.10 6,753.05 7,226.96 6,809.92 Falgun 7,929.73 7,132.05 6,758.20 6,618.00 6,966.90 6,456.10 5,991.95 6,133.30 7,248.30 7,434.30 6,593.80 7,972.38 6,949.02 7,275.52 6,236.40 7,076.75 6,832.15 Magh 8,302.80 7,784.27 7,180.60 6,250.00 7,546.60 7,222.95 6,476.40 6,458.00 7,499.10 7,508.70 7,406.10 7,343.50 7,589.30 7,642.74 6,389.00 7,371.98 7,359.52 Poush 9,784.93 7,935.28 8,254.47 7,836.95 9,132.60 7,388.60 7,910.45 6,394.20 7,109.10 8,547.60 8,956.04 9,275.82 8,752.15 8,653.23 7,041.39 7,362.30 8,058.64 9,942.53 6,565.73 9,095.98 8,208.40 7,905.05 7,234.65 8,592.95 5,487.20 9,903.10 9,992.90 9,107.44 9,322.37 8,891.86 8,927.98 8,431.31 6,268.39 8,863.56 Mangsir Actual Generation (MWh) - Kartik 5,183.15 7,225.65 8,004.37 7,337.15 5,875.25 8,375.65 8,194.90 8,534.80 9,306.98 9,251.37 8,614.03 8,827.25 7,844.55 8,631.96 10,115.50 10,169.90 Aswin 9,781.22 6,047.87 8,096.75 8,081.98 8,177.60 4,621.60 8,838.85 6,449.70 9,455.10 8,895.20 8,335.05 9,215.25 6,602.04 8,169.93 8,294.65 7,294.98 7,907.87 Bhadra 9,282.61 6,406.85 8,091.05 7,814.55 8,632.20 6,630.55 8,486.35 8,379.30 9,206.60 7,608.80 7,685.89 8,738.93 7,127.09 8,334.08 6,707.18 7,558.92 7,303.76 9,698.49 6,494.95 7,937.80 7,191.00 7,854.40 6,644.10 8,652.00 7,617.80 9,393.40 7,407.60 8,003.46 7,781.06 9,033.50 8,081.99 7,824.09 6,024.84 8,420.09 Shrawan Total 84,008.35 95,071.15 92,549.25 91,485.70 81,437.80 96,041.35 74,132.63 95,427.00 97,742.69 94,306.49 97,609.96 86,238.79 86,851.14 92,053.14 113,000.01 105,089.30 100,563.60 3,060,175.76 2061/062 2062/063 2063/064 2064/065 2065/066 2066/067 2067/068 2068/069 2069/070 2070/071 2071/072 2072/073 2073/074 2074/075 2075/076 2076/077 Total Fiscal Year Designed S. 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 N.

NEPAL ELECTRICITY AUTHORITY 65 Generation Directorate 2076/2077 12th Issue, 2077

GANDAK HYDROPOWER STATION

INTRODUCTION in canal. The frequent system changing, high water level in tailrace maintained by Irrigation Dept. UP, Gandak Hydro Power Station is located at Pratappur high deposition of sediment & choking of trash Gaunpalika ward no. -7, District: Nawalparasi, Nepal rack also disrupted power generation. The power about 235 Kms from Kathmandu and about 5 Kms generated from this powerhouse is transmitted North from Indian boarder point called Jhulenipur, through 6.6/132 kV ,10 MVA transformers installed District: Mahrajgunj, Uttar Pradesh. The power house in the switchyard and is connected by 132 kV is a part of irrigation cum power generation scheme single circuit transmission line to Bardhaghat 132 on Gandak River. A barrage has been constructed on KV substation in Nepal and to Ramnagar 132 kV the river Narayani at BhainsaLotan (Balmikinager, substation in Bihar, India. Import and export of Bihar) on Indo-Nepal boarder. From the barrage, two power (nearly 45 MW) from 132 kV substation canals take off namely Gandak Main Eastern Canal situated at Ramnagar, India to Nepal takes place (MEC) and Gandak Main Western Canal (MWC). through 132 KV switchyard of Gandak Hydropower This Power Station is located on the Gandak Main station. At present, preparation of technical proposal Western Canal approximately 18 Km downstream of and study of equipments and components of the plant barrage at Surajpura, Nepal. As the canal is mainly is in progress for the rehabilitation & modernization meant to meet the irrigation needs for Uttar Pradesh, of the plant. India, the discharge through canal is regulated by Water Resource Department Balmikinagar, Bihar, India

The plant has three Horizontal mounted tubular bulb turbines; low head high discharge Kaplan Turbo- Generators of 5 MW each with aggregate capacity of 15 MW and annual design generation of 106.38 GWh. The project was built in1979 AD in assistance Embankment Cutting by Locals to Prevent from Village with the Government of India and Government of Inundation Nepal with the total cost of NRs. 170 million. It was handed over to NEA on 31st Aug 1981. Presently, among three units, the unit no. 2 is in operation & unit no.1 is out of operation for last 13 The actual generation of this year is 10.33 GWh years due to problem in generator’s stator coil & which is 55.48 percent of its target generation 18.63 unit no. 3 is under shutdown since Magh 2075 due GWh. The decrease in power generation is mainly to problem in turbine guide bearing and in other due to frequent & long canal shutdown (i.e. approx. components. five months) of Main Western Canal for inspection, maintenance by Irrigation Department, Bihar, India & sometimes due to local issues causes disturbance

66 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 67 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077

REPAIR AND MAINTENANCE ACTIVITIES • Replacement of carbon seal (shaft seal), Guide vane bushes with seal and Oil cooler of Unit no. MECHANICAL MAINTENANCE 2. • Repair of damaged portion of upstream gate • Repair and maintenance of guide vane side sill plate in Unit no. 3 servomotor, Governor unit of Unit no. 2 • Repair and maintenance of high-pressure

compressor used in oil pressure unit and Pump • Replacement of control panel -2 set for cooling with Motor used in Cooling water system. water system.

Replacement of 132 kV CT CIVIL MAINTENANCE

• Repair of staff quarters and roads in colony premises. • Construction of new staff quarter building. Repairing of Side Sill Plate of Gate • Cleaning and boulder filling work at 132 kV ELECTRICAL MAINTENANCE switchyard. • Cleaning of garbage dumped at headworks • Installation of new Excitation system, during trash rack cleaning by TRCM after a long Temperature sensor and meter with alaram period of time. system for protection of bearings (thrust and • Civil maintenance works of boundary wall. guide bearings) of Unit no. 2. • Cleaning and painting of powerhouse • Installation of Control panel and Repair of equipment. electrical components of old 15 Ton gantry crane. • Repair and maintenance of slip ring, carbon holder etc. of Generator.

NEPAL ELECTRICITY AUTHORITY 67 Generation Directorate 2076/2077 12th Issue, 2077

SALIENT FEATURES

Location Pratappur Gaunpalika-7, Nawalparasi Installed capacity 15 MW Annual Design Generation 106.38 GWh Maximum gross head/Net head 7.59m/6.09m Total length of the waterways 18 km canal Turbine: Type Adjustable Blade Tubular Turbine Number of units, Type 3, Kaplan Rated discharge 103.84m3/s Rated max output 5.52 MW Rated speed 107 rpm Generator: Type Totally Enclosed Synchronous Generator Rated output 5.9 MVA Rated Current 516 Amps Rated voltage 6.6 kV Rated frequency 50 Hz Rated Power factor 0.85 (Lag) Power Transformer 10 MVA, 6.6/132 kV, 2 Nos. Transmission line 132kV,20 km (Balmikinagar), 18 km (Bardhaghat),single circuit Project Hand Over to NEA 31 August,1981 AD Project Financed BY GOI, GON Total Project Cost NRs. 17 Crores

Monthly Energy Generation Trend of last 3 Years 4,000.00 3,500.00 3,000.00 2,500.00 2,000.00 1,500.00 1,000.00

Generation (MWh) 500.00 - Shrawan Bhadra Aswin Kartik Mangsir Poush Magh Falgun Chaitra Baisakh Jestha Ashad FY 2074/75 3,483.80 - 2,151.80 1,022.00 - 2,048.40 2,619.00 3,007.70 890.20 - 54.50 2,218.40 FY 2075/76 1,899.70 1,599.90 1,659.80 213.50 - 1,616.40 869.90 1,703.00 732.20 - 479.50 1,176.90 FY 2075/76 1,603.30 977.00 1,447.20 559.10 - 736.00 1,680.50 1,438.80 726.30 - 228.60 940.80 Months

Actual Generation comparison with Target and Designed Generation 8,000.00

7,000.00

6,000.00

5,000.00

4,000.00

3,000.00 Energy (MWh) 2,000.00

1,000.00

- Shrawan Bhadra Aswin Kartik Mangsir Poush Magh Falgun Chaitra Baisakh Jestha Ashad Actual 1,603.30 977.00 1,447.20 559.10 - 736.00 1,680.50 1,438.80 726.30 - 228.60 940.80 Target 2,172.01 1,892.30 2,121.53 1,358.01 1,077.22 1,931.18 1,567.54 1,560.35 950.56 672.84 1,279.76 2,047.95 Designed 7,440.00 7,320.00 7,320.00 7,320.00 6,013.33 6,382.00 4,796.67 3,560.00 3,576.67 4,290.00 5,920.00 7,076.67 Month of 2076/077

68 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 69 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077 - - Ashad 277.70 628.30 7,076.67 5,314.50 3,124.90 3,856.60 4,970.30 3,476.10 3,660.10 2,296.20 4,035.20 1,217.00 3,035.00 2,044.00 2,463.10 2,891.90 3,554.80 2,169.10 7,615.72 2,691.10 3,513.30 - - Jestha 798.70 5,920.00 4,570.60 5,790.30 6,254.90 5,221.30 3,096.16 4,615.00 2,966.60 3,833.10 2,460.10 3,357.30 4,165.30 2,089.20 3,847.50 4,278.50 1,395.10 8,817.28 1,123.30 3,027.20 3,133.90 - - - 16.30 49.10 63.20 965.40 517.00 954.90 188.90 188.90 4,290.00 Baisakh 2,149.00 2,081.65 2,967.30 1,388.90 2,433.80 1,428.90 1,937.10 1,196.60 1,174.40 1,375.00 9,140.00 - - 812.90 740.80 327.20 956.80 Chaitra 3,576.67 1,404.60 1,910.95 1,480.60 2,938.40 1,011.90 1,462.00 1,476.80 1,887.50 1,185.40 1,206.60 1,354.40 2,118.10 1,230.70 1,311.60 2,162.40 2,060.10 - Falgun 3,560.00 4,068.70 4,207.40 3,061.00 5,137.55 3,654.40 2,667.90 2,760.50 2,935.40 3,737.10 2,707.90 3,946.50 3,214.70 2,747.10 4,018.80 2,943.50 2,192.00 2,267.00 1,548.80 2,123.60 2,791.60 2,687.60 - Magh 4,796.67 4,474.40 4,774.80 3,280.40 5,953.40 3,822.30 2,624.20 2,362.10 3,401.80 3,880.90 2,468.70 3,111.30 4,288.70 2,590.60 4,286.10 3,336.00 2,551.60 3,009.90 1,699.50 1,776.00 2,184.00 3,432.10 - Poush 790.00 6,382.00 4,382.00 5,760.90 5,638.80 5,555.40 4,284.34 3,496.30 3,146.70 3,183.80 3,290.10 2,255.80 2,520.80 4,822.60 2,702.30 4,356.60 4,226.50 3,021.30 3,678.70 1,046.00 2,867.90 2,345.10 - - - - Actual Generation (MWh) 543.20 6,013.33 4,444.20 5,631.50 4,991.20 5,336.50 5,319.20 3,843.20 4,339.50 4,085.60 2,752.10 2,122.80 2,557.50 5,301.20 2,610.60 1,174.30 3,862.80 3,396.60 3,008.40 Mangsir - - - Kartik 420.40 945.10 918.00 7,320.00 3,985.30 5,090.20 5,192.10 4,878.70 5,183.40 3,494.90 4,710.20 3,712.60 2,591.30 3,314.80 2,780.00 2,906.50 1,192.80 4,001.30 3,486.30 2,554.90 ENERGY GENERATION SINCE COMMISSIONING SINCE GENERATION ENERGY - - 54.50 Aswin 193.60 7,320.00 3,636.30 4,501.60 4,415.80 1,354.90 4,968.80 3,736.40 4,769.40 2,838.20 2,803.60 3,325.70 2,412.80 3,324.10 1,120.20 4,026.50 4,191.00 1,285.60 1,529.10 2,516.00 - - 69.70 994.90 845.40 287.50 519.80 550.20 Bhadra 7,320.00 2,116.60 4,368.60 3,116.00 1,122.80 3,248.60 4,376.70 2,777.80 1,637.70 2,626.40 1,556.70 1,133.70 3,674.90 3,771.00 2,905.80 - - 31.10 471.00 125.40 7,440.00 2,533.10 5,029.90 2,971.00 2,823.30 4,059.35 4,911.10 4,344.70 4,024.90 2,935.00 1,491.10 2,203.10 1,551.10 1,118.60 1,312.80 3,183.60 1,376.50 3,467.20 Shrawan Total 71015.34 8,246.00 43,079.30 52,272.70 47,225.70 32,162.55 49,059.29 36,734.86 39,913.40 34,993.40 31,705.70 28,556.70 28,778.50 35,784.90 21,783.80 25,054.30 37,823.30 30,287.30 19,026.60 30,132.10 20,717.40 27,042.30 137,853.00 to 2037/038 2041/042 2042/043 2043/044 2044/045 2045/046 2046/047 2047/048 2048/049 2049/050 2050/051 2051/052 2052/053 2053/054 2054/055 2055/056 2056/057 2057/058 2058/059 2059/060 2060/061 2061/062 2062/063 Fiscal Year Designed 1 2 3 4 5 6 7 8 9 S. 10 11 12 13 14 15 16 17 18 19 20 21 22 N.

NEPAL ELECTRICITY AUTHORITY 69 Generation Directorate 2076/2077 12th Issue, 2077 - Ashad 430.00 392.40 940.80 7,076.67 4,836.60 1,228.30 2,195.20 1,769.90 2,476.50 1,290.30 1,277.90 3,505.60 2,218.40 1,176.90 - - - - - 29.70 54.50 Jestha 479.50 228.60 5,920.00 2,901.70 1,905.00 1,140.10 1,727.10 1,491.70 ------55.20 64.90 293.10 195.60 4,290.00 Baisakh - 886.20 493.90 926.40 996.70 507.90 941.30 890.20 732.20 726.30 Chaitra 3,576.67 3,303.90 1,360.20 1,473.90 1,262.90 896.60 608.90 503.40 Falgun 3,560.00 2,851.50 3,147.10 1,985.70 1,825.90 2,856.50 1,351.10 2,453.20 2,990.80 3,007.70 1,703.00 1,438.80 - 64.90 Magh 869.90 4,796.67 3,664.80 3,746.90 2,472.90 1,132.90 1,561.70 1,455.10 2,023.30 2,376.70 3,008.80 2,619.00 1,680.50 - - Poush 736.00 6,382.00 3,654.00 4,039.70 1,853.00 1,907.60 1,766.00 1,679.10 1,051.60 2,195.80 3,086.70 2,048.40 1,616.40 ------Actual Generation (MWh) 796.60 982.40 928.70 6,013.33 Mangsir - - Kartik 392.70 470.10 595.30 177.60 773.80 570.20 683.90 213.50 559.10 7,320.00 1,744.20 1,014.00 1,022.00 - Aswin 7,320.00 1,575.30 2,149.70 3,218.80 1,140.80 1,922.90 2,614.60 3,499.30 2,638.40 2,398.30 2,112.40 2,151.80 1,659.80 1,447.20 - - 898.80 977.00 Bhadra 7,320.00 1,479.90 2,399.80 2,459.90 1,245.40 2,535.70 2,587.90 2,415.30 2,090.70 1,846.90 1,599.90 - 954.30 7,440.00 3,500.20 2,014.80 2,435.50 2,530.80 2,000.90 2,119.40 2,092.90 1,420.70 1,944.90 3,483.80 1,899.70 1,603.30 Shrawan Total 71015.34 8,802.30 1,793.70 30,601.80 20,479.20 20,525.20 15,006.30 11,331.40 13,077.70 19,207.70 16,249.00 21,872.70 17,495.80 11,950.80 10,337.60 1,036,964.30 2063/064 2064/065 2065/066 2066/067 2067/068 2068/069 2069/070 2070/071 2071/072 2072/073 2073/074 2074/075 2075/076 2076/077 Total Fiscal Year Designed S. 23 24 25 26 27 28 29 30 31 32 33 34 35 36 N.

70 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 71 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077

MODI KHOLA HYDROPOWER STATION

INTRODUCTION outsourced. The works include replacing Francis runner, Labyrinth ring, Sealing ring, 20 nos. of Guide Modikhola Hydropower Station is located at vanes, Guide vane cartridge, Upper self-lubricating Dimuwa in Parbat district about 46 km towards bush and Lower self-lubricating bush, Wearing west from Pokhara City. It has installed capacity of plates for head cover and bottom rings, replacement 14.8 MW with two vertical shaft Francis Turbines, of damaged Turbine guide bearing with new ones 7.4 MW each and annual design generation of 92.5 in Unit-2, replacement of damaged shaft sleeve with GWh. After its successful commissioning in 2000 new ones in Unit-2, replacement of DN150 PN16 AD, the plant operation has been adversely affected gate valve at drainage valve of penstock at turbine especially during rainy season reportedly due to sub- floor. The mechanical workshop came into operation optimal design and inadequate sediment handling by repair & maintenance of Lathe machine & drilling facilities as the Modikhola brings high content of machine that were not in operation due to flooding abrasive sediments. The cumulative generation of workshop on Fiscal year 2068/69. of this plant since its first run has reached 1076.70 GWhr. It has generated 66.913 GWh in the fiscal year 2076/77which is 72.34 % of design capacity and 91.34% of generation target.

Checking clearance of guide vanes with bottom ring

Modikhola Powerhouse & Switchyard ELECTRICAL MAINTENANCE REPAIR AND MAINTENANCE ACTIVITIES Major works carried out under electrical section MECHANICAL MAINTENANCE includes replacement of 300/1 A CT with 600/1 A CT at 33 KV substation to solve the problem of This year, turbine overhauling of Unit-2 was overload at 33 KV transmission line, replacement of successfully completed by internal manpower, 1 set of damaged Lightning arrestor with new ones at third time in a row. The overhauling was completed 132 KV Substation of Pokhara feeder, replacement of without any works or services required to be old damaged sensor such as: temperature sensor of Turbine Guide Bearing, turbine shaft speed sensor,

NEPAL ELECTRICITY AUTHORITY 71 Generation Directorate 2076/2077 12th Issue, 2077

Guide vane position indicator, mini MCR. were awarded to M/s. Chainlink/Pathivara JV. Consequently, cofferdam was built which was washed away due to flood.

Installation of Rotor Shaft during overhauling

CIVIL MAINTENANCE

Similarly, civil works carried out this year include the construction of new control room at intake areas because the old control room need to be demolished Construction of Coffer dam at intake areas for the construction of tailrace of Middle Modi hydropower project. The construction was carried Therefore, time extension is given so that the works out by Middle Modi hydropower project. Similarly, can be continued at more favorable time. a new cable trench was also constructed from the SALIENT FEATURES LT bushing of 132 KV transformer to the 33 KV substation because during the previous fiscal year Type Run of the river 2075/76, 12/15 MVA Transformer at 132/33 KV Location Dimuwa, Parbat substation was replaced by 30 MVA and old 150 Installed capacity 14.8MW mm2 cable at L.V of 33 KV side could not bear the Annual average energy 92.5 GWh increase load during the wet season. Net head 66.96m Catchment area 510km2 A huge boulder was trapped under the riverside Average annual flow 27.5m3/s flushing gate onth 28 Bhadra 2076 due to flood, Total length of the 61.0m(canal), 2071m(tunnel) hindering its operation. waterways Turbine: It caused a lot of loss in electricity generation thus Number and Type 2, Francis impacting the annual generation target. The problem Rated discharge 25m3/s was solved after the boulder was removed using Rated output 7.6 MW excavator on 31st Aswin 2076. Rated speed 428.6 rpm A shade was erected in the sub-station area so that Generator: different electrical equipment such as: Current Rated output 8260 kVA Transformer, Potential Transformer, disconnecting Rated voltage 6.6 kV switches etc. could be protected. Rated frequency 50Hz Power factor 0.9 The repair and maintenance works of intake area Power transformer 7.8/8.3 MVA, 6.6/132 kV, 3 phases including undersluice area, spillway, plunge pool Single circuit 132 kV, upto Lekhnath Transmission line and hydro-mechanical woks associated with it s/s

72 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 73 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077

Montly Energy Generation Trend o last ears 12,.

1,.

,. Generation M Generation

2,.

- Sraan Badra Asin arti Mangsir Pous Mag Falgun Caitra Baisa esta Asad F 2 ,222. ,.2 1,2.2 ,. ,.1 ,. ,21. 2,11. 1,2. ,1. ,21. ,11.1 F 2 ,2. ,1. ,. ,1. ,.2 ,.1 2,. 2,2.2 ,. ,. ,2. ,11. F 2 ,1. ,11. ,. ,. ,1. ,. ,12. ,2. ,. ,1. ,2.2 ,.1 Monts

Actual Generation comparison with Target and Designed Generation 12,000.00

10,000.00

8,000.00

6,000.00

Energy (MWh) 4,000.00

2,000.00

- Shrawan Bhadra Aswin Kartik Mangsir Poush Magh Falgun Chaitra Baisakh Jestha Ashad Actual 7,841.60 6,114.80 5,364.30 7,505.40 5,941.40 3,650.30 3,012.40 3,268.30 3,445.80 5,813.60 8,392.20 6,563.10 Target 6,274.92 7,607.00 9,909.25 8,387.88 5,360.41 3,898.22 2,984.42 2,917.97 3,879.89 5,902.48 8,734.97 7,396.54 Designed 6,957.03 9,244.43 10,931.70 9,868.33 6,904.34 5,370.00 4,158.86 4,099.96 6,003.04 7,454.47 11,053.83 8,954.03 Month of 2076/077

NEPAL ELECTRICITY AUTHORITY 73 Generation Directorate 2076/2077 12th Issue, 2077 Ashad 8,954.03 3,418.90 3,989.60 5,011.60 2,676.90 3,282.40 4,037.60 5,806.70 1,696.10 7,646.60 4,400.50 5,839.80 855.00 2,561.10 3,527.20 5,895.80 5,297.20 6,601.60 7,101.10 7,114.80 6,563.10 Jestha 11,053.83 9,439.80 7,099.90 6,965.70 5,303.10 5,056.40 4,569.70 7,370.60 6,551.70 6,215.40 4,989.60 6,653.30 3,313.80 3,524.80 5,160.70 5,989.50 7,164.40 7,891.00 7,231.70 8,286.70 8,392.20 Baisakh 7,454.47 5,144.00 5,781.20 5,282.30 4,624.40 3,898.10 4,136.70 6,366.00 5,351.80 5,107.60 4,823.00 4,475.70 4,491.10 2,905.60 3,963.50 3,319.60 4,752.40 5,476.80 4,361.50 6,907.60 5,813.60 Chaitra 6,003.04 2,319.00 4,166.40 3,866.50 3,836.30 2,106.30 3,638.80 5,126.50 3,332.40 3,133.50 4,013.70 2,923.40 3,300.70 2,640.50 3,182.80 3,902.40 3,568.00 4,143.20 1,028.30 3,807.80 3,445.80 Falgun 4,099.96 2,585.90 2,684.70 2,878.80 2,923.20 2,372.10 3,451.10 3,501.30 3,023.90 2,754.90 2,426.60 2,199.05 2,269.10 1,830.00 2,779.30 3,418.80 2,728.50 3,022.40 2,115.00 2,562.20 3,268.30 Magh 4,158.86 3,316.90 3,152.60 3,142.30 2,945.50 1,649.70 3,551.60 3,058.20 3,054.30 3,307.20 2,667.50 2,917.90 2,165.20 2,066.60 2,607.70 3,360.50 3,079.60 3,128.40 3,213.80 2,656.90 3,012.40 Poush 5,370.00 3,994.20 3,513.90 3,985.50 3,853.40 3,704.60 4,190.90 3,941.30 4,320.00 3,846.90 3,735.70 3,955.90 2,564.00 2,309.00 3,521.90 4,585.90 3,890.20 4,465.60 3,847.30 3,343.10 3,650.30 Mangsir 6,904.34 5,167.90 5,750.10 5,140.30 4,913.80 4,990.10 4,419.70 4,840.80 5,600.50 5,684.70 4,813.70 5,153.80 2,976.10 2,444.10 3,230.60 5,896.20 5,216.90 6,664.20 5,005.10 4,749.20 5,941.40 Kartik 9,868.33 6,059.90 5,049.20 4,475.00 5,986.40 5,506.00 4,173.10 6,693.90 7,452.10 8,187.10 4,974.70 8,321.80 3,313.10 3,612.60 2,274.30 8,427.40 7,294.00 9,023.00 7,746.90 6,801.60 7,505.40 ENERGY GENERATION SINCE COMMISSIONING SINCE GENERATION ENERGY Aswin 10,931.70 - 5,000.30 4,915.90 5,147.20 5,486.30 4,567.80 9,335.50 6,157.80 9,293.80 4,312.90 8,786.20 2,257.30 4,060.30 4,795.80 6,089.80 8,421.70 8,188.80 10,200.20 9,937.50 5,364.30 Bhadra 9,244.43 - 2,567.90 5,785.20 992.40 1,098.00 3,651.40 7,894.60 4,179.10 5,419.10 3,913.80 5,073.20 4,081.90 2,013.30 3,522.20 5,711.50 6,863.60 6,607.30 7,349.20 7,106.70 6,114.80 Shrawan 6,957.03 - 2,418.20 2,925.90 2,223.90 3,030.60 2,064.90 3,413.50 3,182.20 1,923.90 5,941.20 3,661.30 3,021.10 750.70 3,071.80 2,357.80 4,510.70 4,344.10 7,222.60 6,027.50 7,841.60 Actual Generation (MWh) Total 91,000.02 41,446.50 51,174.00 54,375.00 45,426.50 42,180.60 46,453.30 67,348.90 53,901.90 62,520.70 51,012.90 59,961.35 34,608.40 30,718.60 41,637.80 58,955.20 62,787.20 69,556.40 66,422.70 69,301.60 66,913.20 1,076,702.75 Total Fiscal Year 2057/058 2058/059 2059/060 2060/061 2061/062 2062/063 2063/064 2064/065 2065/066 2066/067 2067/068 2068/069 2069/070 2070/071 2071/072 2072/073 2073/074 2074/075 2075/076 2076/077

S. N. Designed 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

74 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 75 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077

SUNKOSHI HYDROPOWER STATION

INTRODUCTION PRESENT STATUS

Sunkoshi Hydropower Station, located at 81 km Presently, all the three units of the station are in east from Kathmandu, in Sindupalchowk district, is operation. The station has kept on with the regular a run-of-river daily pondage power station with an preventive maintenance works thereby increasing installed capacity of 10.05 MW and annual design the machine running hours and reducing the outage generation of 70 GWh. This station has 3 units of hours. Due to Rainy season, flushing of sand in 3.35 MW each. The powerhouse was commissioned damsite and desander basin and also the cleaning in January 1972 with a friendly cooperation of the of trash rack is being carried out daily in order to Water Conservancy and electric Power Ministry of prevent the corrosion in turbine unit. the People’s Republic of China and Government of Nepal. Cost of the project was approximately NRs. REPAIR AND MAINTENANCE ACTIVITIES 109.4 million including transmission line up to MECHANICAL MAINTENANCE Kathmandu.

• Complete overhauling of unit no. 1 and 2. The cumulative generation of the station has reached 2440.348 GWh in 2076/77 from the first run. It has • Repair & maintenance of monorail hoist of generated 62.245 GWh in FY 2076/77 which is maintenance gate of dam site. 88.92% of design capacity and 102.85% of generation • Maintenance of gates of peak load pondage. target. • Repair and maintenance of head cover, runner and guide vanes.

ELECTRICAL MAINTENANCE

• Changing of Excitation System of all Units. • Maintenance of Breaker of 6.3 MVA, 6.3/66 kV. • Changing of bushing and cable heads; oil filtration of 6 MVA, 66/11 kV transformer. • Changing of bus bar by cover conductor. • Maintenance of breaker of 3 MVA, 6.3/33 KV transformer for evacuation of power after interruption of 33 kV transmission line. • Maintenance of SCADA system of dam site and changing the Limit Switch of SCADA system. Overhauling of Unit No. 2

NEPAL ELECTRICITY AUTHORITY 75 Generation Directorate 2076/2077 12th Issue, 2077

SALIENT FEATURES

Type Run-of-river Installed Capacity 10.05 MW Annual design 70 GWh generation Designed head 30.5 m Design discharge 39.9 m3/s Length of canal 2.653 km Diameter of penstock 2.4 m

Breaker Maintenance Turbine generator set 3 Shaft configuration Vertical CIVIL MAINTENANCE Turbine: Type Francis (Model: HL123a-LJ-140) • River training works with Gabion to protect Output per unit 3530 kW store of Sunkoshi HPS. Speed 300 rpm • Drain cleaning works at upstream of settling Generator: basin and at Lapsikhola. Synchronous, 3 phase (Model: TS Type • Debris removal works at Dam site’s upstream 325/36-20) and downstream area. Capacity 3350 kW Rated Voltage 6.3 kV • Repair and maintenance of water supply system Rated Current 361 A of Colony area. Rated Power Factor 0.85 • Black Topping work of access road. Project inception date End of 1968 Project placed in service January, 1972 People’s Republic of China and Project financed by Government of Nepal NRs. 109.37 million (including Project Cost transmission line)

Blacktopping of access road

Monthly Energy Generation Trend of last 3 Years 8,000.00 7,000.00 6,000.00 5,000.00 4,000.00 3,000.00 2,000.00

Generation (MWh) 1,000.00 - Shrawan Bhadra Aswin Kartik Mangsir Poush Magh Falgun Chaitra Baisakh Jestha Ashad FY 2074/75 5,174.90 5,271.40 5,895.00 6,618.70 4,728.80 4,197.90 3,574.40 3,137.20 2,783.20 3,248.10 4,736.30 5,684.60 FY 2075/76 4,488.20 5,146.30 6,450.80 6,934.40 5,114.40 4,093.70 3,305.50 3,316.70 3,864.90 6,044.20 7,114.30 6,283.30 FY 2076/77 6,086.10 5,578.10 6,856.30 6,849.80 5,906.40 4,252.82 3,563.31 3,405.93 3,468.87 4,850.88 6,372.66 5,054.78 Months

76 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 77 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077 Ashad 6,700.05 - 4,591.68 1,529.76 1,751.04 4,770.72 2,503.68 4,243.68 4,613.28 6,446.88 6,456.96 Jestha 5,850.54 - 4,991.04 2,865.12 2,185.44 4,733.76 774.24 4,212.96 3,983.04 5,375.04 6,100.32

Baisakh 4,514.27 - 3,990.72 3,272.16 1,750.56 4,654.12 3,376.32 3,636.96 3,044.16 4,491.84 3,528.96 Ashad 5,054.78 5,922.29 6,700.05 Chaitra 3,340.14 - 3,093.12 3,288.00 1,696.32 4,022.88 3,255.36 3,015.84 2,849.28 2,693.76 1,920.96 Jestha 6,372.66 5,949.96 5,850.54 4,850.88 5,013.03 4,514.27 Baisakh Falgun 2,776.13 - 3,063.84 2,534.40 1,168.32 3,545.28 3,038.40 2,767.20 2,767.68 2,664.00 2,797.92 Chaitra 3,468.87 3,611.08 3,340.14 Magh 3,235.31 - 3,343.20 3,003.36 2,222.56 4,058.88 2,960.16 3,041.28 3,012.00 3,072.96 3,196.80 Falgun 3,405.93 3,142.05 2,776.13 Magh 3,563.31 3,426.83 3,235.31 Poush 4,042.98 - 4,503.84 4,152.96 865.28 4,196.16 3,034.56 3,191.04 3,682.08 3,861.12 3,627.84 Poush Month of 2076/077 4,252.82 4,248.40 4,042.98 Mangsir 5,267.93 - 5,788.80 4,607.52 - 4,057.44 4,380.00 3,965.28 4,094.40 5,106.24 5,185.92 5,906.40 5,345.97 5,267.93 Mangsir Kartik 6,849.80 6,439.53 6,505.51 Kartik 6,505.51 - 6,718.46 4,809.12 - 4,270.08 5,513.28 5,692.32 5,892.96 4,875.84 6,441.12 Aswin 6,856.30 6,046.62 6,818.01 ENERGY GENERATION SINCE COMMISSIONING SINCE GENERATION ENERGY Actual Generation comparison with and Target Designed Generation Aswin 6,818.01 - 6,385.44 5,940.48 - 3,535.20 4,446.24 5,308.80 6,165.12 4,573.92 6,679.68 Bhadra 5,578.10 5,685.26 6,818.01 6,086.10 5,692.25 6,818.01 Shrawan Bhadra 6,818.01 - 5,208.96 4,178.40 - 3,874.52 4,410.24 4,441.44 5,049.12 4,745.28 6,650.40 -

Actual Target Designed 8,000.00 7,000.00 6,000.00 5,000.00 4,000.00 3,000.00 2,000.00 1,000.00 Energy (MWh) Energy Shrawan 6,818.01 - 5,729.38 4,802.40 - 2,858.88 4,269.12 4,549.92 4,445.28 4,516.80 6,000.00 Actual Generation (MWh) Total 62,686.89 589,738.68 57,408.48 44,983.68 11,639.52 48,577.92 41,961.60 48,066.72 49,598.40 52,423.68 58,586.88 Fiscal Year 2028/029 to 2041/042 2042/043 2043/044 2044/045 2045/046 2046/047 2047/048 2048/049 2049/050 2050/051 S. N. Designed 1 2 3 4 5 6 7 8 9 10

NEPAL ELECTRICITY AUTHORITY 77 Generation Directorate 2076/2077 12th Issue, 2077 Ashad 6,700.05 6,085.48 5,846.88 5,398.08 5,989.92 6,711.36 6,804.00 4,861.44 4,728.48 6,015.84 4,549.44 884.21 5,437.85 5,374.30 5,536.20 6,683.10 5,969.20 6,885.70 7,147.80 5,496.40 6,757.20 - 1,538.30 4,283.90 5,684.60 6,283.30 5,054.78 Jestha 5,850.54 6,115.24 5,902.56 4,983.84 6,466.20 1,438.56 6,459.84 4,239.84 4,088.16 6,051.36 4,783.68 5,744.83 5,878.11 5,560.20 5,100.60 5,702.70 4,284.70 5,314.20 6,335.10 6,632.20 6,175.60 - 1,958.80 4,794.10 4,736.30 7,114.30 6,372.66 Baisakh 4,514.27 4,591.20 4,785.60 2,892.96 5,533.44 3,418.56 4,134.72 3,471.36 3,868.32 4,291.68 3,359.04 4,129.48 4,419.53 3,873.49 3,264.80 3,673.80 2,983.80 3,433.60 3,744.80 4,466.80 3,884.60 1,608.00 2,854.00 3,492.90 3,248.10 6,044.20 4,850.88 Chaitra 3,340.14 3,367.68 3,728.16 2,952.96 3,804.96 2,900.16 3,374.88 2,783.52 3,024.96 3,454.08 2,729.76 3,461.83 3,378.33 4,169.47 2,774.80 2,983.60 2,805.10 2,776.60 3,700.50 3,328.20 3,346.50 3,740.00 2,979.90 3,503.90 2,783.20 3,864.90 3,468.87 Falgun 2,776.13 2,855.52 3,468.00 2,961.60 3,040.32 2,972.16 3,036.00 2,833.92 2,733.60 3,098.88 2,822.40 3,254.59 2,924.04 3,486.95 3,070.70 2,721.30 2,588.30 2,888.70 3,298.10 3,211.50 3,116.90 3,272.80 3,185.30 2,881.40 3,137.20 3,316.70 3,405.93 Magh 3,235.31 2,984.64 3,644.64 3,200.64 3,102.24 3,362.88 3,362.88 3,149.28 3,280.32 3,109.44 3,168.96 3,436.59 3,354.79 3,524.46 3,370.00 3,183.00 2,957.00 3,163.00 3,224.40 3,148.30 3,513.00 3,215.90 3,629.70 3,684.50 3,574.40 3,305.50 3,563.31 Poush 4,042.98 3,505.92 4,247.04 4,080.48 4,097.28 3,977.76 4,695.84 3,974.88 3,785.76 3,651.36 3,947.52 4,049.32 3,879.40 4,187.63 4,032.60 3,967.50 3,761.20 3,789.60 4,391.40 3,636.90 4,626.50 4,326.60 4,272.60 4,261.20 4,197.90 4,093.70 4,252.82 Mangsir 5,267.93 4,602.24 5,258.40 5,496.00 5,385.12 5,055.36 6,209.28 5,158.08 4,890.24 940.80 4,980.48 4,736.16 4,593.01 5,410.49 4,835.20 5,477.70 5,230.90 5,480.90 5,852.60 5,115.50 6,308.90 3,179.80 4,712.10 5,728.10 4,728.80 5,114.40 5,906.40 Kartik 6,505.51 6,479.04 6,516.96 6,566.88 6,340.80 6,591.84 6,986.40 5,976.00 5,013.12 5,411.52 5,566.56 4,398.24 3,863.95 5,577.42 4,710.40 6,952.50 6,514.60 6,819.60 7,348.80 7,063.20 6,473.10 - 4,766.70 6,527.20 6,618.70 6,934.40 6,849.80 Aswin 6,818.01 7,080.00 6,975.36 5,776.80 6,457.92 6,383.52 7,057.44 5,773.44 5,604.96 5,999.52 4,199.52 5,423.52 4,357.76 5,412.63 5,453.20 6,683.80 6,779.60 6,902.10 7,160.60 7,152.20 6,663.40 - 2,186.90 4,252.70 5,895.00 6,450.80 6,856.30 Bhadra 6,818.01 6,914.40 6,484.80 5,726.40 5,180.64 6,509.76 7,261.92 5,617.44 4,260.00 5,426.88 4,536.96 5,120.16 4,502.41 4,559.52 5,570.70 6,161.80 6,815.40 6,400.60 6,965.40 7,194.40 6,752.30 473.10 1,553.80 2,772.20 5,271.40 5,146.30 5,578.10 Shrawan 6,818.01 6,968.64 6,141.60 5,525.76 3,967.20 5,430.24 6,804.96 6,442.08 5,542.56 5,343.84 5,537.28 5,595.84 4,739.47 5,467.43 5,365.10 6,402.80 6,695.60 6,500.80 7,213.60 7,131.40 7,049.40 3,197.90 2,356.10 8.60 5,174.90 4,488.20 6,086.10 Actual Generation (MWh) Total 62,686.89 61,550.00 63,000.00 55,562.40 59,366.04 54,752.16 66,188.16 54,281.28 50,820.48 52,795.20 50,181.60 50,234.77 51,328.65 56,603.99 53,084.30 60,593.60 57,385.40 60,355.40 66,383.10 63,577.00 64,667.40 23,014.10 35,994.20 46,190.70 55,050.50 62,156.70 62,245.94 2,440,348.63 Fiscal Year 2051/052 2052/053 2053/054 2054/055 2055/056 2056/057 2057/058 2058/059 2059/060 2060/061 2061/062 2062/063 2063/064 2064/065 2065/066 2066/067 2067/068 2068/069 2069/070 2070/071 2071/072 2072/073 2073/074 2074/075 2075/076 2076/077 S. N. Designed 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 Total

78 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 79 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077

PUWA KHOLA HYDROPOWER STATION

INTRODUCTION

Puwakhola hydropower station is a run-off river type plant operating with the water of the Puwakhola River, a river in the Far East Nepal has installed capacity of 6.2 MW and annual design generation of 48 GWh.

The plant was commissioned and constructed Control Room after Rehabilitation work with the in-house management of the Nepal Electricity Authority and the source of fund was REPAIR AND MAINTENANCE ACTIVITIES the Government of Nepal and Nepal Electricity Authority which was commissioned in 1999 AD MECHANICAL MAINTENANCE with a cost of US$15.7million dollars. • Replacement of MIV, Hydraulically operated It has two identical units of 3.1 MW each and has By-Pass valve and Brake jet valve of Unit No.2. generated 34.914 GWh energy in this fiscal year and • Replacement of OPU system in Unit No. 2 till date generation of the plant is 624.73 GWh. • Replacement of Penstock Drain Valve of both Unit. PRESENT STATUS • Repair and maintenance of Oil coolers of both Currently both units are in normal operation. Units. The geology of the area lying across the penstock alignment from Anchor Block 3 to 5 is still fragile causing the anchor blocks to shrink and resulting penstock pipes to buckle and bend. In current F/Y despite of Covid-19 challenge, 6.6 kV Switchgears, Digital Excitation System of both Units, MIV, OPU, Digital governor of Unit no. 2 were installed and operated Unit No. 2 machine in manual mode with limited technical experts and materials. Due to Covid-19 lockdown final automation has not been completed in this fiscal year. Thus, it seems that the OPU System after Rehabilitation Work remaining up-gradation work will be completed after easy movement of materials and technical persons in F/Y 2077/78.

NEPAL ELECTRICITY AUTHORITY 79 Generation Directorate 2076/2077 12th Issue, 2077

• Repair and maintenance of some cracks at floor area in between Anchor Block 3 to 5 of penstock and Bush Cutting around penstock alignment.

SALIENT FEATURES

Type Run- of- river Location Ilam Installed capacity 6.2 MW Annual design generation 48 GWh Net head 304 m Catchment area 125.1 km2 MIV after Rehabilitation work Average annual flow 2.5 m3/s Live storage volume 2057m3 ELECTRICAL MAINTENANCE Diversion weir type, 30.4m crest Dam length • Replacement of 8 MVA Power Transformer, Total length of the 192 m 33 kV lightning Arrestor, 33 kV PT, addition waterways of Lightning Arrestor at both end of Power 1 No., 1001m long, Dia1.10-0.60m, Penstock Transformer at switchyard. steel pipe • Replacement of 6.6 kV Switch Gear & Protection Turbine: Panels. Number and Type 2, Horizontal Pelton Rated discharge 1.25 m3/s • Replacement of Digital Excitation System of both Units. Rated output 3.3 MW Rated speed 600 rpm • Replacement of Unit control, Digital Governor Generator: in Unit No. 2 and operating the unit in manual Rated output 3.7 MVA mode. Rated voltage 6.6 kV Rated frequency 50 Hz CIVIL MAINTENANCE Power factor 0.85

• Maintenance of leakage at Fore-bay. Power transformer 8 MVA, 6.6/33 kV, 3 phase, 1 No. Transmission line 33 kV about 0.4 km, single circuit • Maintenance of drinking water supply system for Office, Quarter and Power House.

33 kV Switchyard after Rehabilitation Work

80 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 81 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077

Monthly Energy Generation Trend of last 3 Years 5,000.00 4,500.00 4,000.00 3,500.00 3,000.00 2,500.00 2,000.00 1,500.00 Generation (MWh) 1,000.00 500.00 - Shrawan Bhadra Aswin Kartik Mangsir Poush Magh Falgun Chaitra Baisakh Jestha Ashad FY 2074/75 3,883.74 4,234.64 4,224.08 4,231.79 2,488.99 1,833.45 1,347.65 1,430.18 1,432.73 2,440.20 3,871.75 4,371.35 FY 2075/76 4,412.66 3,859.84 4,357.75 3,747.97 2,317.63 1,862.38 1,433.26 1,834.42 1,948.12 2,565.89 2,517.80 3,335.09 FY 2076/77 4,510.63 4,504.98 4,330.12 3,378.76 2,946.42 2,289.15 1,855.95 1,581.43 1,598.11 1,976.67 2,046.75 3,895.58 Months

Actual Generation comparison with Target Generation 5,000.00 4,500.00 4,000.00 3,500.00 3,000.00 2,500.00 2,000.00 1,500.00

Energy (MWh) 1,000.00 500.00 - Shrawan Bhadra Aswin Kartik Mangsir Poush Magh Falgun Chaitra Baisakh Jestha Ashad Actual 4,510.63 4,504.98 4,330.12 3,378.76 2,946.42 2,289.15 1,855.95 1,581.43 1,598.11 1,976.67 2,046.75 3,895.58 Target 4,370.07 4,200.15 4,324.58 3,433.60 2,707.06 1,930.74 1,507.98 1,770.94 1,692.67 2,196.93 2,540.42 3,967.43

Month of 2076/077

NEPAL ELECTRICITY AUTHORITY 81 Generation Directorate 2076/2077 12th Issue, 2077 Ashad 2,478.72 1,424.37 1,208.30 1,328.06 2,741.82 3,040.13 2,337.56 4,047.99 3,644.51 3,446.00 3,767.11 3,027.51 2,734.57 3,771.23 3,905.38 2,994.43 4,145.91 4,112.81 4,371.35 3,335.09 3,895.58 Jestha 2,367.41 1,735.15 1,831.92 1,767.62 3,350.45 1,392.48 2,385.29 3,416.93 3,559.66 1,888.35 1,547.19 2,700.74 1,240.52 3,058.73 1,529.81 2,089.57 2,711.56 2,587.23 3,871.75 2,517.80 2,046.75 728.42 Baisakh 1,847.65 1,160.06 1,743.87 1,325.95 1,640.60 1,785.31 1,507.48 2,503.26 1,573.84 1,242.44 1,423.78 2,212.69 1,163.55 1,800.95 2,264.91 1,183.59 1,877.65 2,440.20 2,565.89 1,976.67 421.73 965.22 915.80 714.60 Chaitra 1,494.05 2,046.14 1,627.61 1,711.73 1,058.28 1,853.35 1,601.96 1,353.81 1,374.88 1,182.94 1,069.57 1,385.93 1,299.97 1,836.17 1,432.73 1,948.12 1,598.11 - 982.50 Falgun 1,548.59 1,404.58 1,927.78 1,677.07 1,382.30 1,169.05 2,702.60 1,828.18 1,188.46 1,030.71 1,021.18 1,019.31 1,034.47 1,500.07 1,400.60 1,331.75 1,430.18 1,834.42 1,581.43 - Magh 999.86 1,166.98 1,875.70 1,753.10 2,117.23 1,851.84 1,327.99 1,672.91 2,018.26 1,572.28 1,373.22 1,480.84 1,239.85 1,101.53 1,400.69 1,673.54 1,535.49 1,347.65 1,433.26 1,855.95 - Poush 1,890.38 2,173.29 2,102.69 2,470.51 1,464.05 1,572.97 2,081.66 2,215.96 2,070.11 2,047.17 1,877.91 1,839.38 1,553.41 2,009.65 1,904.93 2,023.88 2,269.38 1,833.45 1,862.38 2,289.15 - Actual Generation (MWh) 2,146.08 2,476.13 2,845.97 3,421.92 3,247.06 2,431.33 3,105.39 3,341.40 2,727.56 3,002.19 2,759.77 2,916.64 2,312.64 2,737.98 2,686.56 2,815.36 3,478.20 2,488.99 2,317.63 2,946.42 Mangsir - Kartik 2,077.97 2,809.31 3,343.01 3,540.96 3,660.24 3,558.61 3,904.87 3,895.59 4,111.40 3,930.76 3,910.51 4,197.49 3,783.06 4,015.62 4,024.15 4,309.62 4,279.92 4,231.79 3,747.97 3,378.76 ENERGY GENERATION SINCE COMMISSIONING SINCE GENERATION ENERGY - Aswin 2,035.06 2,844.05 2,952.38 2,665.54 3,338.33 4,164.24 3,098.59 3,614.03 3,865.54 3,821.13 3,629.72 3,846.84 3,888.38 3,546.31 4,118.42 4,185.59 4,239.61 4,224.08 4,357.75 4,330.12 - Bhadra 2,518.90 2,325.70 2,696.64 3,095.28 3,187.59 3,741.26 2,074.18 3,972.89 3,881.78 3,526.06 3,794.36 3,743.02 3,228.63 3,842.97 4,125.36 3,987.15 4,408.80 4,234.64 3,859.84 4,504.98 - 2,628.29 1,971.70 2,075.86 3,007.44 3,316.80 3,676.80 2,011.76 3,374.65 4,335.25 3,672.97 3,757.73 3,205.89 4,341.68 4,083.24 3,917.26 4,094.75 4,457.24 3,883.74 4,412.66 4,510.63 Shrawan Total 7,115.51 21,297.05 24,158.60 26,165.20 31,356.43 29,377.86 28,930.86 32,473.49 34,640.93 31,682.98 30,058.09 31,547.84 28,330.00 30,435.67 29,604.95 32,412.28 33,831.52 36,414.25 35,790.55 34,192.81 34,914.55 624,731.42 2056/057 2057/058 2058/059 2059/060 2060/061 2061/062 2062/063 2063/064 2064/065 2065/066 2066/067 2067/068 2068/069 2069/070 2070/071 2071/072 2072/073 2073/074 2074/075 2075/076 2076/077 Total Fiscal Year 1 2 3 4 5 6 7 8 9 S. 10 11 12 13 14 15 16 17 18 19 20 21 N.

82 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 83 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077

CHATARA HYDROPOWER STATION

INTRODUCTION in full load throughout the year. Water released after power generation is used for the irrigation in Chatara Hydropower Station, a canal drop type Sunsari and Morang districts. Farmers do not require hydropower station, is located at Chatara, Sunsari water throughout the year therefore during the crop with an installed capacity of 3.2 MW (2 units, each harvesting time and canal maintenance time period, of capacity 1.6 MW) and annual design generation the hydropower station has to stop generation. of 6 GWh. It was commissioned in 1996 AD with the assistance from Government of India at a cost of The generating unit was facing frequent tripping NRs. 162.6 million. The plant which was originally and shutdowns because of voltage fluctuations in the designed to be a captive plant for powering drazer 33 kV Dharan Chatara Line. This problem has been pumps to flush sediments from the Canal was later sorted out by the installation of new 3.5 MVA 33/11 handed over to NEA by Sunsari Morang Irrigation kV OLTC Power Transformer at the switchyard. Project (SMIP) on 29th March, 1999. The Rehabilitation of another unit (Unit No. 1) has been planned. For this, the bidding documents has been prepared and are in the process of approval.

SALIENT FEATURES

Type Canal drop Location Chatara, Sunsari Installed Capacity 3.2 MW Annual design generation 6 GWh Net Head 5.38 m Turbine: Number 2 Nos. Type Kaplan (Bevel Gear Bulb Turbine) Rated Speed 165 rpm Generator: Type Synchronous Generator Rated Output 1627 kW

Power Transformer in the Switchyard Rated Voltage 11 kV

A single unit of the plant is in operation since the Rated Frequency 50 Hz FY 2075/76 after the complete plant shutdown for Rated Speed 750 rpm five years. The total energy generation of the plant Power Transformer 3500 kVA, 11/33 kV this FY is 1822 MWh. Since it is mainly an irrigation Transmission Line 33 kV, 14 km scheme, the hydropower station cannot be operated

NEPAL ELECTRICITY AUTHORITY 83 Generation Directorate 2076/2077 12th Issue, 2077

Monthly Energy Generation Trend of last 3 Years 500.00 450.00 400.00 350.00 300.00 250.00 200.00 150.00 Generation (MWh) 100.00 50.00 - Shrawan Bhadra Aswin Kartik Mangsir Poush Magh Falgun Chaitra Baisakh Jestha Ashad FY 2074/75 - - - - - 22.25 ------FY 2075/76 - - 73.75 447.75 354.25 362.25 289.50 223.50 212.00 115.25 421.25 198.75 FY 2076/76 323.50 118.00 - - - - 26.50 268.00 360.00 305.50 173.75 246.75

Months

Actual Generation comparison with Target and Designed Generation 1,000.00 900.00 800.00 700.00 600.00 500.00 400.00

Energy (MWh) 300.00 200.00 100.00 0.00 Shrawan Bhadra Aswin Kartik Mangsir Poush Magh Falgun Chaitra Baisakh Jestha Ashad Actual 323.50 118.00 - - - - 26.50 268.00 360.00 305.50 173.75 246.75 Target 571.88 507.08 477.76 374.07 280.94 285.36 211.38 187.91 202.15 229.98 411.5 425.99 Designed 944.78 874.95 717.72 428.34 339.76 339.53 282.12 267.83 280.72 317.04 519.25 687.96

Month of 2076/077

Kaplan Runner

84 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 85 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077 ------2.75 23.00 63.75 198.75 246.75 Ashad 687.96 119.50 290.75 638.25 446.00 532.25 644.00 734.00 620.50 560.50 289.00 279.00 504.75 489.75 497.00 ------42.50 421.25 173.75 Jestha 519.25 121.50 310.25 313.00 594.00 428.50 429.75 420.25 554.00 479.25 370.00 376.25 349.25 357.50 193.25 340.75 ------1.25 17.75 69.75 16.75 115.25 305.50 317.04 283.75 138.75 131.50 327.00 338.25 292.25 138.25 172.00 227.75 146.75 269.50 Baisakh ------47.00 35.25 79.00 99.75 212.00 360.00 280.72 191.75 129.50 123.25 108.75 299.50 168.25 109.00 187.25 124.00 133.50 Chaitra ------3.75 92.00 27.50 28.75 90.00 223.50 268.00 267.83 209.75 213.00 237.00 285.75 110.25 133.00 167.00 143.25 Falgun ------8.00 26.50 11.50 92.75 49.25 70.75 Magh 289.50 282.12 132.50 301.00 173.75 213.00 163.50 181.00 133.00 166.00 ------22.25 30.75 91.75 39.75 362.25 Poush 339.53 202.00 183.00 226.25 285.25 112.75 106.75 239.75 284.25 100.50 260.75 125.00 132.00 ------Actual Generation (MWh) 44.25 38.50 78.25 11.25 354.25 339.76 170.50 362.50 247.75 182.50 303.00 341.00 113.25 172.25 265.00 195.00 Mangsir ------75.50 33.50 447.75 Kartik 428.34 377.50 322.00 317.50 457.00 310.75 435.75 287.75 113.25 197.25 317.25 364.25 108.50 ------ENERGY GENERATION SINCE COMMISSIONING SINCE GENERATION ENERGY 73.75 62.75 33.00 60.50 Aswin 717.72 190.50 672.50 565.50 602.25 458.25 621.75 765.75 659.25 110.50 396.25 522.75 612.75 486.25 ------2.25 46.00 23.75 118.00 874.95 121.75 109.50 509.25 675.75 666.50 590.50 933.50 759.00 673.75 383.75 213.50 666.25 460.75 492.50 Bhadra ------98.75 51.00 323.50 944.78 143.25 113.25 352.50 468.00 125.00 683.50 746.00 707.25 462.75 609.25 163.00 653.25 804.25 727.00 1,008.00 Shrawan - - Total 23.00 53.25 22.25 490.75 209.25 978.50 6,000.00 1,431.00 1,187.50 4,253.00 3,926.75 4,504.25 4,115.00 4,563.25 5,219.75 3,839.25 2,638.25 2,424.50 4,097.75 3,032.75 1,643.75 2,355.25 2,698.25 1,822.00 55,529.25 2052/053 2053/054 2054/055 2055/056 2056/057 2057/058 2058/059 2059/060 2060/061 2061/062 2062/063 2063/064 2064/065 2065/066 2066/067 2067/068 2068/069 2069/070 2070/071 2071/072 2072/073 2073/074 2074/075 2075/076 2076/077 Fiscal Year Total Designed 1 2 3 4 5 6 7 8 9 S. 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 N.

NEPAL ELECTRICITY AUTHORITY 85 Generation Directorate 2076/2077 12th Issue, 2077

PANAUTI HYDROPOWER STATION

INTRODUCTION station has generated 2.886 GWh in FY 2076/77.

Panauti Hydropower Station is third oldest PRESENT STATUS Hydropower Station of Nepal. It is run of river At present the power plant is generating about scheme hydropower plant with intake on right 2.882 GWh of annual energy. The water of the river bank of Roshi Khola and Power House is located at now mainly used for drinking purpose. The water Khopasi, Kavre, nearly 35 km east of Kathmandu. users along the canal are having the same irrigation The plant is with install capacity of 2.4 MW and facilities as earlier days. Recently the power station annual design generation of 6.97 GWh. It was control, monitoring, substation and protection commissioned in 1965 A.D. and developed jointly by system is upgraded. Soviet Union Government and GON at a cost of NRs. 27 million. The station was developed with joint REPAIR AND MAINTENANCE ACTIVITIES purpose of hydropower generation and irrigation. ELECTROMECHANICAL MAINTENANCE However, the water in the canal has also been used for drinking purposes as well. • Construction of new overhead 33kV transmission line at IT Park, Banepa. The water of the river now mainly used for drinking purpose. The water users along the canal are having • Installation and Commissioning of 3MVA Power the same irrigation facilities as earlier days. Recently Transformer at Bhakatapur sub-stataion. the power station control, monitoring, substation • Installation and Commissioning of Control and and protection system has been upgraded. Relay Panel at Bhakatapur sub-stataion. • Repair and maintenance of Francis Runner and its components of unit 3. • Repair and maintenance of Intake Gates. • Bearing Housing and Bearing replacement work of unit no 1. • Bearing replacement and Repair of Bypass valve of unit no 2. • Replacing Bushing, Copper Studs, Lighting arrester, OTI and complete Oil of Power Transformers of Power House. • Upgrading distribution lines of Office and Forebay Areas. Bird eye view of power station • Restoration of control and AVR system of Unit The cumulative generation of the station has reached no. 2 138.066 GWh till F.Y. 2076/77 from its first run. The

86 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 87 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077

SALIENT FEATURES

Type Run of River Location Panauti Municipality – 10, Khopasi Installed capacity 2.4 MW Annual design generaion 6.97 GWh Maximum gross head / 66m /60m Net head Waterways: Total length of the Canal 3.721 km Discharge Capacity of 3.2 m3/s Canal Live storage volume of 50,000 m3 Regulating Reservoir Unit no 2-repair work Penstock 1 No., 370m long, Dia1.4m Turbine: CIVIL MAINTENANCE Number and Type 3, Horizontal Francis • Cleaning works for Canal and Intake. Rated discharge 1.61 m3/s • Repair and maintenance of headrace canal. Rated output 0.85 MW Rated speed 1000 rpm • Repair, maintenance and restoration works for Generator: colony and office buildings. Rated output 1000 kVA • Painting Works for Office building and Colony. Rated voltage 6.3 kV • Construction of Store truss, guard house and Rated frequency 50 Hz toilet and bathroom. Power factor 0.8 • Trash cleaning and moved in safe place at 1550 kVA* 2Nos., 6.3 kV/33 kV, 3 Power transformer colony. phase • Tower survey of 33 kV transmission line for Transmission line 33 kV, 20 km, single circuit repair and maintenance purpose.

Construction of 33 KV overhead Transmission Line

NEPAL ELECTRICITY AUTHORITY 87 Generation Directorate 2076/2077 12th Issue, 2077

Monthly Energy Generation Trend of last 3 Years 600.00

500.00

400.00

300.00

200.00

Generation (MWh) 100.00

- Shrawan Bhadra Aswin Kartik Mangsir Poush Magh Falgun Chaitra Baisakh Jestha Ashad FY 2074/75 - - 32.52 - 103.33 200.81 89.59 70.49 100.63 120.37 153.45 241.26 FY 2075/76 432.49 464.03 504.66 361.89 262.05 214.08 176.54 163.79 129.06 173.17 30.21 93.91 FY 2076/77 336.48 361.41 336.08 357.32 317.80 251.50 197.90 134.26 71.87 209.28 144.38 168.49

Months

Actual Generation comparison with Target and Designed Generation 1,200.00

1,000.00

800.00

600.00

400.00 Energy (MWh) 200.00

- Shrawan Bhadra Aswin Kartik Mangsir Poush Magh Falgun Chaitra Baisakh Jestha Ashad Actual 336.48 361.41 336.08 357.32 317.80 251.50 197.90 134.26 71.87 209.28 144.38 168.49 Target 492.3 509.52 531.73 412.73 317.73 268.72 192.78 163.24 139.09 173.18 158.78 256.51 Designed 835.19 903.85 959.01 828.36 600.93 498.84 386.38 290.36 275.7 316.64 430.61 644.14

Month of 2076/077

88 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 89 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077 - - 5.47 98.10 39.24 83.09 61.97 93.91 644.14 Ashad 402.84 458.82 162.00 234.97 297.54 119.72 147.78 234.77 189.24 110.20 241.26 168.49 - - 81.18 56.88 29.28 37.76 18.77 30.78 86.17 27.55 66.45 81.20 30.21 430.61 Jestha 306.72 203.04 236.16 175.50 125.81 153.45 144.38 - - - 8.71 86.18 43.74 98.54 70.21 316.64 225.54 156.78 127.98 194.58 143.64 101.07 141.91 113.28 118.13 120.37 173.17 209.28 Baisakh - - - 275.7 77.04 50.76 78.48 35.66 68.56 10.65 71.08 93.22 25.58 73.21 71.87 196.38 123.48 121.68 135.72 100.63 129.06 Chaitra - - - 81.90 64.98 93.48 71.85 79.82 70.49 290.36 206.82 163.80 118.80 187.02 186.30 103.92 146.39 122.30 151.97 163.79 134.26 Falgun - - 96.30 95.94 72.92 93.43 55.22 89.59 Magh 386.38 275.22 253.26 218.52 147.96 205.20 107.18 111.78 113.47 120.76 144.60 176.54 197.90 - - 498.84 Poush 331.02 355.32 281.16 195.66 194.76 311.76 209.70 193.46 230.84 281.34 151.85 245.46 121.26 204.17 260.02 200.81 214.08 251.50 - - Actual Generation (MWh) 40.65 600.93 428.04 416.16 358.38 300.42 309.60 318.42 255.78 277.65 258.74 249.30 306.40 162.65 269.45 324.72 103.33 262.05 317.80 Mangsir - - - 828.36 Kartik 590.04 426.96 463.86 430.74 280.98 390.42 237.24 373.72 238.54 262.80 126.18 316.75 129.34 293.67 405.94 361.89 357.32 - - 65.52 32.52 959.01 ENERGY GENERATION SINCE COMMISSIONING SINCE GENERATION ENERGY Aswin 683.10 442.44 611.64 473.04 529.56 359.40 234.72 538.70 609.79 152.64 283.29 175.53 339.21 399.35 504.66 336.08 - - - 903.85 581.76 330.66 567.36 607.86 512.64 539.28 272.88 236.70 643.81 557.42 242.82 312.12 134.47 353.26 312.55 464.03 361.41 Bhadra - - - 835.19 427.32 550.80 594.90 555.66 437.22 394.38 281.16 336.60 399.92 369.85 266.76 254.80 180.40 237.51 188.82 432.49 336.48 Shrawan Total 6970.01 4,654.80 1,421.46 3,801.60 3,684.42 3,074.94 2,898.55 3,077.94 1,879.55 2,879.32 2,729.22 1,280.16 1,510.82 2,206.52 1,632.39 2,052.59 2,498.56 1,112.45 3,005.88 2,886.75 89,778.68 138,066.61 2057/058 2058/059 2059/060 2060/061 2061/062 2062/063 2063/064 2064/065 2065/066 2066/067 2067/068 2068/069 2069/070 2070/071 2071/072 2072/073 2073/074 2074/075 2075/076 2076/077 Fiscal Year 2032/033 to Total Designed 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 S.N.

NEPAL ELECTRICITY AUTHORITY 89 Generation Directorate 2076/2077 12th Issue, 2077

SETI HYDROPOWER STATION

INTRODUCTION of rollers, replacing Bushing, Copper Studs, OTI and complete Oil of Power Transformers of Power Seti Hydropower Station is a run of river type House, servicing of 10 Ton EOT crane inside power power plant with installed capacity of 1.5 MW and house, installation and commissioning of 630 kVA, design generation of 9.8 GWh consisting of 3 units 6.3/11kV Transformer for Unit-3, Varnishing and each 0.5 MW. It is located at Nadipur, Pokhara Insulation Testing of Generator of Unit-1. and was commissioned in 1985 AD with assistance from Government of People’s Republic of China Moreover, new Digital Governor with Oil Pressure and Government of Nepal. The power canal for this Unit and Unit Control system has been delivered power station is jointly used for irrigation purposes to the site but due to the pandemic situation caused looked after by Irrigation Division Office, Pokhara by Covid-19 and successive lockdown, the works and hence, the operation of this power station is couldn’t be completed as technical experts from affected by irrigation as well. India were unable to access the site.

The cumulative generation of Seti HPS has reached SALIENT FEATURES 336.814 GWh till FY 2076/77 from its first run. The Type Run of River station has generated 11.158 GWh in FY 2076/77 Location Nadipur, Pokhara which is 113.86 % of design generation. Installed capacity 1.5 MW Annual design 9.8 GWh Presently, all the three units are in normal operation generation and the station has the ability to operate at its full Maximum Net head 22.5 m capacity round the year. In this FY, Seti Hydropower Total length of the 7.7 km Station has generated maximum annual energy waterways among the last 9 years, due to the proper utilization Penstock 1 No., 90m long, Dia 2.4m, steel lined of available water and implementation of proper Turbine: preventative maintenance schedule. Number and Type 3, Horizontal Francis Rated discharge 2.96 m3/s REPAIR AND MAINTENANCE ACTIVITIES Rated output 543 kW Rated speed 500 rpm The major activities accomplished in this fiscal year

2076/77 are; Electro-mechanical Overhauling of Generator: Unit-1 with Refurbished Runner, Side Cover and Rated output 500 kW Guide Vanes, replacing Main Seal of Main Inlet Rated voltage 6.3 kV Valve of Unit-1, replacing Bearing Oil Coolers of Rated frequency 50 Hz Unit-1 &2, replacing Generator Guide Bearing of Power factor 0.8 Unit-2, repair & maintenance of Desander Gates Power transformer 650 kVA, 6.3/11 kV, 3 Nos. with new Threaded Spindles, Gear box & motor, Transmission line 11 kV replacing seals of Penstock Inlet Gate with repairing

90 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 91 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077

Overhauling of Unit no.1

Monthly Energy Generation Trend of last 3 Years 1,200.00

1,000.00

800.00

600.00

400.00 Generation (MWh) 200.00

- Shrawan Bhadra Aswin Kartik Mangsir Poush Magh Falgun Chaitra Baisakh Jestha Ashad FY 2074/75 969.75 918.81 1,019.61 975.60 877.59 421.47 897.84 823.05 883.62 886.23 702.09 811.08 FY 2075/76 927.27 904.77 924.30 885.33 806.22 922.86 815.00 761.80 802.30 909.81 708.39 661.95 FY 2076/77 641.79 940.05 876.96 920.79 995.04 972.18 937.71 1,005.12 1,011.15 1,026.54 872.37 958.59

Months

Actual Generation comparison with Target and Designed Generation 1,200.00

1,000.00

800.00

600.00

400.00 Energy (MWh)

200.00

- Shrawan Bhadra Aswin Kartik Mangsir Poush Magh Falgun Chaitra Baisakh Jestha Ashad Actual 641.79 940.05 876.96 920.79 995.04 972.18 937.71 1,005.12 1,011.15 1,026.54 872.37 958.59 Target 891.09 864.32 929.65 917.13 907.85 914.56 873.42 836.38 875.97 878.63 804.88 784.98 Designed 775.71 770.45 861.09 836.18 870.38 856.27 808.83 787.66 818.18 826.97 828.70 759.58

Month of 2076/077

NEPAL ELECTRICITY AUTHORITY 91 Generation Directorate 2076/2077 12th Issue, 2077 - Ashad 759.58 635.77 610.79 770.93 660.96 804.52 543.87 635.13 766.08 642.24 826.83 877.68 566.19 949.59 915.03 936.99 591.93 719.55 722.79 796.68 880.83 756.36 811.08 661.95 958.59 - Jestha 828.70 924.37 658.71 794.60 821.77 788.76 639.99 686.25 884.88 793.44 731.43 782.19 921.87 487.80 999.36 747.18 527.76 929.61 920.70 982.98 101.25 702.09 708.39 872.37 1,035.99 - 826.97 905.21 609.84 699.75 875.45 663.93 728.10 612.90 861.48 650.79 866.52 692.91 852.93 737.73 561.87 985.50 904.86 846.00 172.62 886.23 909.81 Baisakh 1,032.84 1,033.83 1,012.77 1,026.54 - 818.18 914.64 274.33 687.17 686.56 670.83 647.28 833.22 648.37 679.95 808.47 909.90 902.34 987.57 872.73 909.81 812.88 883.39 915.48 883.62 802.30 Chaitra 1,008.45 1,012.50 1,022.85 1,011.15 - 787.66 903.40 450.46 693.99 650.61 772.37 477.45 793.08 518.31 735.48 457.11 916.56 976.23 740.07 931.86 917.10 953.46 984.69 833.31 886.77 855.36 729.81 823.05 761.80 Falgun 1,005.12 - Magh 808.83 968.11 814.81 841.77 715.63 600.93 525.06 693.27 557.37 820.44 880.29 891.27 940.23 955.26 871.20 974.70 962.64 888.93 910.89 896.67 773.10 897.84 815.00 937.71 1,011.15 - Poush 856.27 927.82 700.21 893.97 831.28 752.22 685.89 824.76 582.03 726.48 898.56 965.70 995.94 920.25 993.87 969.48 833.49 956.16 909.36 421.47 922.86 972.18 1,070.46 1,040.58 1,016.91 Actual Generation (MWh) - 870.38 949.25 664.25 868.32 819.39 902.43 770.67 875.79 761.04 827.82 933.93 913.14 918.90 967.59 887.85 989.55 983.43 801.81 889.02 958.95 877.59 806.22 995.04 1,088.10 1,024.20 Mangsir - Kartik 836.18 921.16 786.17 921.69 877.68 927.54 708.03 910.80 848.34 888.93 913.41 940.41 916.29 999.09 998.64 961.38 844.83 971.37 791.19 975.60 885.33 920.79 1,045.35 1,016.91 1,029.24 - ENERGY GENERATION SINCE COMMISSIONING SINCE GENERATION ENERGY Aswin 861.09 899.54 874.04 747.81 811.44 814.47 721.53 869.22 714.78 826.11 940.86 920.07 932.58 888.03 603.99 978.03 996.39 882.90 968.22 488.61 924.30 876.96 1,076.49 1,012.59 1,019.61 - 770.45 819.69 784.23 640.53 809.07 807.33 857.50 783.81 746.64 809.55 698.67 963.18 700.56 854.64 767.81 940.12 903.60 930.96 843.12 870.93 941.49 566.82 918.81 904.77 940.05 Bhadra - 775.71 786.59 759.42 745.38 786.87 800.28 732.33 681.48 690.84 751.23 703.17 931.77 798.57 918.45 757.35 957.87 906.03 927.00 868.77 758.07 920.25 881.31 969.75 927.27 641.79 Shrawan Total 9,800.00 7,987.26 9,305.91 9,346.71 9,305.61 8,037.70 9,199.71 8,580.16 9,152.46 9,659.25 8,044.86 98,020.09 10,555.55 10,704.78 10,822.77 10,870.11 11,197.73 11,616.19 10,411.29 10,512.54 10,892.52 10,224.81 10,991.74 10,186.74 10,030.00 11,158.29 336,814.78 2052/053 2053/054 2054/055 2055/056 2056/057 2057/058 2058/059 2059/060 2060/061 2061/062 2062/063 2063/064 2064/065 2065/066 2066/067 2067/068 2068/069 2069/070 2070/071 2071/072 2072/073 2073/074 2074/075 2075/076 2076/077 Fiscal Year Total 2042/043 to Designed 1 2 3 4 5 6 7 8 9 S. 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 N.

92 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 93 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077

FEWA HYDROPOWER STATION

INTRODUCTION

Fewa hydropower station is a canal drop type power station having an installed capacity of 1.0 MW and located at Pardi, Birauta, Pokhara with an annual design generation of 6.5 GWh. It consists of 4 units each 0.25 MW. It was commissioned in 1969 AD and developed jointly by Government of India and Government of Nepal. The public encroachment of power canal leading to power house is a concern for normal operation regardless of the availability of generating units. Maintenance of MIV The Electromechanical rehabilitation and The cumulative generation of the station has reached modernization of Phewa hydropower station is 97.677 GWh till 2076/77 from its first run. The station in progress by assigning Chilime Engineering has generated 2.126 GWh in FY 2076/77 which is Company as a consultant. Now, the technical 78.77 % of target generation. specification, estimate and bid document for the rehabilitation is finalized by the consultant and the Unit-2 of Fewa HPS was in shutdown condition bid will be published in next fiscal year. for previous 7 years period, this year the unit was restored in operation condition after installing new SALIENT FEATURES Generator Circuit breaker, repairing of synchronizing Type Canal Drop circuit, excitation circuit with DC Excitor. Location Pokhara,Kaski REPAIR AND MAINTENANCE ACTIVITIES Installed capacity 1.0 MW Annual design generation 6.5 GWh Apart from restoration of unit no. 2, other major Net head 74.68 m activities accomplished in this fiscal year 2076/77 Total length of the waterways 1.0 km are; Electromechnical Overhauling of Unit-2, laying Turbine: 11kV XLPE Cable from Power Transformers to Oil Number and Type 4, Horizontal Francis Circuit Breaker, replacing Bushing, Copper Studs, Rated speed 1000 rpm OTI and complete Oil of Power Transformers of Generator: Power House, repairing of AC and DC distribution Rated output 288 kW system, condition monitoring of penstock pipes of Rated voltage 400 V Phewa. Rated frequency 50 Hz Power transformer 350 kVA, 0.4/11kV, 4 Nos. Transmission line 11kV

NEPAL ELECTRICITY AUTHORITY 93 Generation Directorate 2076/2077 12th Issue, 2077

Monthly Energy Generation Trend of last 3 Years 400.00 350.00 300.00 250.00 200.00 150.00 100.00 Generation (MWh) 50.00 - Shrawan Bhadra Aswin Kartik Mangsir Poush Magh Falgun Chaitra Baisakh Jestha Ashad FY 2074/75 157.55 214.59 243.39 130.34 223.82 250.41 237.35 219.53 102.27 - - 92.43 FY 2075/76 107.05 157.01 234.24 67.96 89.09 39.28 190.00 223.80 209.30 115.53 - 98.42 FY 2076/77 142.60 231.90 186.14 157.25 231.96 353.00 326.46 208.67 29.19 138.76 4.64 115.97

Months

Actual Generation comparison with Target and Designed Generation 800.00

700.00

600.00

500.00

400.00

300.00 Energy (MWh) 200.00

100.00

- Shrawan Bhadra Aswin Kartik Mangsir Poush Magh Falgun Chaitra Baisakh Jestha Ashad Actual 142.60 231.90 186.14 157.25 231.96 353.00 326.46 208.67 29.19 138.76 4.64 115.97 Target 193.71 208.09 238.61 218.79 262.07 281.4 276.88 265.95 201.04 143.89 165.98 243.17 Designed 383.45 399.43 405.75 670.69 628.55 702.81 576.45 500.01 391.67 386.66 756.89 697.65

Month of 2076/077

94 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 95 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077 - - - - - 88.24 37.28 23.31 92.43 98.42 697.65 Ashad 478.59 300.05 315.69 107.41 120.54 109.68 217.87 132.72 226.49 209.60 148.92 128.24 127.16 162.56 115.97 ------4.11 4.64 35.76 24.20 756.89 Jestha 519.23 209.43 214.08 188.15 117.43 113.19 ------1.81 2.50 97.17 63.22 96.77 83.52 64.73 26.53 386.66 265.25 169.91 170.55 125.96 102.80 115.53 138.76 Baisakh - - - - 2.80 40.03 28.00 20.87 89.72 96.98 37.46 29.19 391.67 110.56 120.52 139.49 226.24 105.23 268.69 219.13 146.94 100.90 171.52 109.21 102.27 209.30 Chaitra - - - 500.01 199.44 285.73 192.22 113.92 176.19 197.20 117.88 190.58 287.60 140.77 172.64 124.03 203.54 229.24 343.01 215.60 197.66 130.27 152.29 219.53 223.80 208.67 Falgun - - Magh 576.45 265.75 395.45 293.79 260.25 207.52 193.90 272.18 230.18 267.23 273.45 207.58 300.52 285.86 235.70 190.22 303.77 232.50 282.77 225.15 228.40 237.35 190.00 326.46 - - 39.28 702.81 Poush 305.30 462.04 482.13 313.48 338.22 296.02 354.28 234.24 329.12 405.45 182.61 411.02 356.29 356.88 247.65 137.34 249.58 362.94 228.59 214.88 250.41 353.00 Actual Generation (MWh) - - - - 52.15 89.09 628.55 431.19 188.83 425.59 383.28 229.58 303.16 238.71 319.45 377.00 377.26 336.95 280.06 187.72 222.90 270.38 195.60 114.53 223.82 231.96 Mangsir - - - 75.46 65.02 96.86 78.41 86.39 67.96 670.69 Kartik 460.10 174.31 266.40 268.47 250.05 156.58 152.22 203.19 188.69 150.18 104.25 121.17 104.11 122.55 130.34 157.25 ENERGY GENERATION SINCE COMMISSIONING SINCE GENERATION ENERGY - - - - 97.85 11.65 64.51 405.75 Aswin 127.91 136.19 135.38 159.73 278.35 194.42 210.11 110.05 134.62 159.24 228.16 254.94 262.60 180.82 180.27 243.39 234.24 186.14 - - - - 6.29 97.09 41.47 57.26 46.11 13.17 97.59 399.43 103.74 274.01 165.50 151.78 144.19 150.90 238.12 218.91 214.69 168.84 168.43 214.59 157.01 231.90 Bhadra - - - - - 87.47 97.56 26.15 56.23 383.45 115.46 168.12 109.16 202.22 164.44 261.07 156.62 207.86 263.05 219.99 213.03 150.05 122.48 157.55 107.05 142.60 Shrawan Total 527.27 6500.01 2,867.73 2,226.43 2,458.90 2,230.50 1,101.43 1,249.18 1,744.91 1,352.41 2,373.47 2,405.25 1,216.11 2,179.81 1,425.18 1,913.49 1,872.21 2,081.96 2,050.14 2,310.74 1,664.77 1,467.69 1,871.68 1,531.68 2,126.54 53,427.78 97,677.26 to 2025/026 2052/053 2053/054 2054/055 2055/056 2056/057 2057/058 2058/059 2059/060 2060/061 2061/062 2062/063 2063/064 2064/065 2065/066 2066/067 2067/068 2068/069 2069/070 2070/071 2071/072 2072/073 2073/074 2074/075 2075/076 2076/077 Total Fiscal Year Designed 1 2 3 4 5 6 7 8 9 S. 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 N.

NEPAL ELECTRICITY AUTHORITY 95 Generation Directorate 2076/2077 12th Issue, 2077

SUNDARIJAL HYDROPOWER STATION

INTRODUCTION The rehabilitation of this power station is underway under the joint assistance from ADB, GON. Nepal Sundarijal Hydropower Station is located at Electricity Authority has received loan (Loan Sundarijal, 15 km northeast of Kathmandu and Number 2808-NEP, Grants 0270-NEP and 0271- serves twin purpose of water supply and energy. NEP) from Asian Development Bank (ADB) towards the cost of Power Efficiency Improvement as part The tail-water discharge is utilized for water of Electricity Transmission Expansion and Supply supply system to Kathmandu Valley. It has two Improvement Project. NEA intends to apply a turbo-generator sets with total installed capacity portion of the proceeds of this loan for Rehabilitation of 640 kW & annual generation 4.77 GWh. This and upgrading of Sundarijal hydropower plant from Plant was erected under Colombo Plan scheme 640 kW to 970kW. whereby the main equipment’s were supplied by The English Electric Company Ltd., England. It was The rehabilitation works largely consists of commissioned in 1934 AD, and is the second oldest Electromechanical rehabilitation work with hydropower plant constructed in Nepal. The actual modernization of Plant Control System and civil generation from this plant in this year is 2.814 GWh improvement work at intake and head pond. Tthe and cumulative generation till now is 131.679 GWhr. rehabilitation construction works of Sundarijal Hydropower station is in progress. The contract for Sundarijal Hydropower Station Rehabilitation in EPC model has been awarded on April 2017 based on the inception report of the consultant. The access road to the powerhouse has been rebuilt with upgradation for easy transportation of heavy equipment, which was stored in NEA’s Training Centre, Kharipati. Headpond of the Sundarijal hydropower plant has been rehabilitated with construction of gabion structure weir with RCC structure supported metallic trash rack. Out of the two Generator-Turbine units each 320 kW, one unit (Unit no. 2) has been completely rehabilitated with Turbine Units upgradation of power to 485 kW. Unit no. 1 could Major maintenance works carried out in this year for not be continued for rehabilitation work as prevailed the plant are; repair and maintenance of main gate lockdown-imposed situation due to Covid-19 valve, needle opening and closing system of unit 1 pandemic situation. and completion of repair and maintenance of intake downstream flushing gate. After successful testing and commissioning of unit no. 2, it is running in regular operation now,

96 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 97 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077 fully automated with SCADA system. For the SALIENT FEATURES rehabilitation of Unit no. 1 its Turbine-Generator Type Run of river soon will be dismantled and replaced by new Location Sundarijal, Kathmandu Turbine-Generator, However, till now the Unit no. Installed capacity 640 kW 1 is also running with previously existed system Annual design generation 4.77 GWh whenever is required for additional drinking water Maximum Net head 216.0 m supply, upon request from Kathmandu Upatyaka Penstock 1386m long, Dia 0.45m/0.30m Khanepani Limited (KUKL). Turbine: Number and Type 2, Horizontal Pelton Rated output 485 kW Rated speed 900 rpm Generator: Rated output 377 kVA Rated voltage 3.3 kV Rated frequency 50 Hz Power factor 0.85 Power transformer 2.7/11kV, 2 Nos. Transmission line 11 kV Pelton Wheel

Monthly Energy Generation Trend of last 3 Years 600.00

500.00

400.00

300.00

200.00

Generation (MWh) 100.00

- Shrawan Bhadra Aswin Kartik Mangsir Poush Magh Falgun Chaitra Baisakh Jestha Ashad FY 2074/75 498.00 466.66 406.00 389.33 444.33 369.66 284.66 235.33 221.00 224.66 306.66 486.00 FY 2075/76 470.33 468.99 453.66 382.00 231.33 240.00 229.66 226.33 209.67 215.67 211.67 248.00 FY 2076/77 256.00 248.00 239.33 214.00 99.99 134.33 139.67 190.33 297.84 308.36 330.57 356.35

Months

Actual Generation comparison with Target and Designed Generation 600.00

500.00

400.00

300.00

200.00 Energy (MWh)

100.00

- Shrawan Bhadra Aswin Kartik Mangsir Poush Magh Falgun Chaitra Baisakh Jestha Ashad Actual 256.00 248.00 239.33 214.00 99.99 134.33 139.67 190.33 297.84 308.36 330.57 356.35 Target 245.76 238.08 230.4 230.4 122.88 145.92 192 254.13 262.09 260.74 330.79 408.28 Designed 478.23 459.43 447.96 451.25 426.07 404.68 384.54 319.09 283.53 277.86 378.56 458.80

Month of 2076/077

NEPAL ELECTRICITY AUTHORITY 97 Generation Directorate 2076/2077 12th Issue, 2077 - Ashad 458.80 225.66 427.33 306.33 230.00 155.33 453.66 406.66 364.00 431.33 432.99 398.33 448.66 405.00 363.32 418.33 455.95 486.00 248.00 356.35 - Jestha 378.56 205.66 298.66 373.66 224.66 240.66 401.00 308.66 303.66 217.00 391.66 252.33 367.33 245.00 389.32 321.00 291.33 306.66 211.67 330.57 - 277.86 265.33 238.00 253.33 260.00 195.00 294.33 240.00 219.66 217.00 288.00 241.33 208.00 102.00 278.33 187.66 253.99 224.66 215.67 308.36 Baisakh - 283.53 300.33 233.00 255.33 297.66 195.00 238.66 235.66 253.66 225.33 243.66 266.00 216.66 172.33 289.66 219.66 239.66 221.00 209.67 297.84 Chaitra - 319.09 338.00 223.33 303.66 325.66 194.33 225.32 296.83 282.98 267.33 282.00 306.00 288.00 204.00 319.33 256.33 286.33 235.33 226.33 190.33 Falgun - Magh 384.54 407.33 228.33 380.33 362.66 254.00 354.00 186.67 269.00 302.33 162.33 322.66 311.00 236.66 310.00 286.66 326.00 284.66 229.66 139.67 - Poush 404.68 394.33 231.00 406.00 414.66 232.33 404.00 424.88 252.33 404.33 189.66 380.00 340.66 273.66 394.66 342.33 428.66 369.66 240.00 134.33 - Actual Generation (MWh) 99.99 426.07 385.66 216.33 357.33 408.66 200.31 406.33 443.33 370.00 432.33 429.33 426.33 402.00 238.00 436.00 451.33 438.00 444.33 231.33 Mangsir - Kartik 451.25 399.66 230.66 285.00 409.66 226.55 434.33 456.66 438.33 385.00 459.66 456.33 444.33 259.00 453.00 478.00 447.32 389.33 382.00 214.00 ENERGY GENERATION SINCE COMMISSIONING SINCE GENERATION ENERGY - Aswin 447.96 415.33 179.33 358.00 410.33 250.99 420.21 448.66 415.66 474.51 392.00 440.00 419.66 440.33 420.33 453.00 446.32 406.00 453.66 239.33 - 459.43 401.00 344.33 398.33 438.66 236.55 378.66 447.54 448.33 486.66 390.00 425.33 382.33 454.33 435.33 427.00 447.55 466.66 468.99 248.00 Bhadra - 478.23 236.00 308.33 415.66 429.00 231.33 345.00 450.33 444.66 506.58 460.33 431.00 369.66 451.00 441.00 452.66 429.57 498.00 470.33 256.00 Shrawan Total 4,770.00 3,974.29 3,158.63 4,092.96 4,211.61 2,612.38 4,355.50 4,345.88 4,062.27 4,349.73 4,121.62 4,345.64 4,198.29 3,481.31 4,530.28 4,293.96 4,490.68 4,332.29 3,587.31 2,814.76 56,320.37 131,679.76 Upto 2057/058 2058/059 2059/060 2060/061 2061/062 2062/063 2063/064 2064/065 2065/066 2066/067 2067/068 2068/069 2069/070 2070/071 2071/072 2072/073 2073/074 2074/075 2075/076 2076/077 Total Fiscal Year Designed 1 2 3 4 5 6 7 8 9 S. 10 11 12 13 14 15 16 17 18 19 20 N.

98 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 99 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077

PHARPING HYDROPOWER STATION

INTRODUCTION 9th Jestha). It is located in Pharping of Kathmandu district, nearly 12 km south from the city. Pharping Hydropower Station, considered to be the second hydropower station in Asia, is the first Power HISTORICAL BACKGROUND Station built in Nepal and hence, holds the legacy of After the visit of Britain by Rana Prime Minister hydropower development in Nepal for more than a Chandra Samser in 1964 B.S., a committee was century. formed, realizing the necessity of hydropower station, under executive engineer Col. Kishor Narasingh Rana for planning of the hydropower station. The committee selected Pharping site for the Power station.

An electrical engineer, Mr. Bernard Pontet from Britain visited Nepal and worked for detail estimate. Another engineer, Mr. TE Lynch, arrived for the erection of equipment of the plant. The construction was completed in just 20 months with furthe Pharping Reservoir involvement of some Nepalese overseers, technicians It was inaugurated by the late king Prithivi Bir and few Indian technicians. Bikram Shah Dev on Monday, 22 May 1911 (B.S. 1968,

PROJECT COST

The total cost of NRs. 0.71 million was incurred by Government of Nepal which includes;

1 Pipeline/ Head Works/ Reservoir 196,324.84

2 Powerhouse/ Colony/ Tailrace and widening of Bagmati river 156,778.31

3 Substation/ Office/ Store 36,175.80

4 Transmission Line/ Street Light/ Distribution Line and Telephone Line 111,049.50

5 London to Calcutta Transportation/ Commission of Agent 28,699.26

6 Calcutta to Bhimphedi Transportation 40,311.79

7 Bhimphedi to Site 40,372.32

8 Salary/ Wages 103,565.00

Total (NRs) 713,273.82

NEPAL ELECTRICITY AUTHORITY 99 Generation Directorate 2076/2077 12th Issue, 2077

The costs of equipments (Generators, Turbines, etc.) plant is not being operated for generation nowadays are not included in the above cost. They seemed to though it has been placed in standby mode to operate be given on grant by British Government to Nepal. occasionally and to demonstrate to the visitors.

OPERATION AND MAINTENANCE After 25 years of shutdown of the plant, major equipment was repaired and overhauled in There are two units each 250 kW with an aggregate FY 2062/63 and both units were tested and installed capacity of 500 kW. The power station commissioned with local load. It was synchronized was generating energy till 1982 AD (2038 BS). As with Integrated Nepal Power System (INPS) again the water from the penstock has been diverted to on December 20, 2006. drinking water supply to Kathmandu by KUKL, the

SALIENT FEATURES

Reservoir: Diameter 200 ft Depth 18 ft Total Storage Capacity 5, 28,783.00 cu. ft. Penstock Pipe: Diameter (internal) 20 inch Total length of pipes 2538 feet Power Station General: Design Head 682 feet Installed Capacity 500 kW Number of units 2 Turbine Generator Sets 2 Shaft Configuration Horizontal Turbine: Type Pelton Revolution 600 rpm Manufacturer GE company, USA Generator: Type Synchronous, 3 Phase Capacity 312.5 kVA Power Factor 0.8 Rated Voltage 3.3 kV Rated Current 54.8 A Configuration Y Excitation Voltage 37 V Excitation Current 169 A Transformer: Capacity 350 kVA Voltage Level 3.3/11 kV Numbers 2 Breaker Type MOCB all M/C Synchronized 11 kV Overhead Transmission Line: Length 6 miles Poles Steel Type Wooden Two major crossings on Bagmati River 600 ft & 800 ft long

100 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 101 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077

HETAUDA DIESEL POWER STATION

INTRODUCTION REPAIR AND MAINTENANCE ACTIVITIES

Hetauda Diesel Power Station, with installed capacity • Repair, maintenance of Air compressor no.2, of 14.41 MW is located at Hetauda, Makawanpur. engine no.7 exhaust pipeline, and engine no.5 The first phase with three sets of English Units exhaust pipeline eroded along with top cover was commissioned in 1963 and the second phase cap. with four sets of Russian Units was commissioned • Servicing of all the engines and Cleaning of Air in 1980 in assistance from British Government and filters. Government of Nepal. • Repair & maintenance work of engine no.6 exhaust pipeline. • Repair & maintenance of Pump motor.

SALIENT FEATURES

Type Diesel fueled (Thermal) District Makwanpur, Hetauda Location W.N.-1 Installed capacity 14.41 MW Annual design generation 922.24 MWh 4Nos. of 2.5 MW Engine set 3Nos. of 1.47 MW Fuel used High Speed Diesel (HSD) Machine Hall Generator: The plant operates during peak; however, the soaring Number 4Nos. of 3125 kVA fuel price has made its operation costlier compared 3Nos. of 1862.5 kVA to that of hydropower stations. Presently, the plant Rated voltage 11kV has been operating at capacity of 10 MW in need of Rated frequency 50Hz system peak load and for regular testing purposes. Power factor 0.8 Rated speed 750 rpm The cumulative generation of the plant has now Excitation AC exciter of 6.5V reached 155.45 GWh from its first run. The station has generated 113 MWh in FY 2075/76 and 57 MWh in FY 2076/77.

NEPAL ELECTRICITY AUTHORITY 101 Generation Directorate 2076/2077 12th Issue, 2077 - - - - 12.80 Ashad 274.50 131.80 537.10 281.60 1,331.00 - - - - - Jestha 423.90 893.40 432.70 119.90 1,020.80

- - - - - 1.30 279.80 571.80 Baisakh 2,392.30 1,094.90 7.84 4.60 12.07 Ashad - - - 18.70 27.90 9.26 8.65 4.81 806.00 523.30 607.40 Chaitra Jestha 2,387.30 1,696.80 2.11 12.25 10.38 Baisakh - - - 0.20 473.80 146.40 619.30 Falgun 1,810.90 2,321.20 1,366.40 8.42 4.14 11.23 Chaitra - - - - - 7.55 8.59 4.07 Magh 820.80 996.10 Falgun 2,009.30 1,944.50 1,492.60 8.36 6.83 11.85 Magh - - - - 7.30 Months Poush 927.70 1,818.90 2,071.40 1,590.90 1,028.00 9.08 8.88 10.73 Poush Actual Generation (MWh) - - - - 4.41 12.17 10.20 4.50 41.20 Mangsir 742.30 714.90 1,142.50 1,529.10 Mangsir 9.37 6.07 29.63 Kartik - - - - - 8.62 Kartik 628.80 575.50 200.90 1,000.60 Monthly Energy Generation Trend of last 3 Years 7.02 9.95 4.81 Aswin ENERGY GENERATION SINCE COMMISSIONING SINCE GENERATION ENERGY 5.45 9.71 3.02 - - - - - Bhadra 42.20 72.80 Aswin 769.30 248.50 426.50 5.93 7.25 3.35 Shrawan ------19.40 33.70 87.50 344.20 512.30 Bhadra 5.00 35.00 30.00 25.00 20.00 15.00 10.00

FY 2074/75 FY 2075/76 FY 2076/77 Generation (MWh) Generation ------86.10 88.30 248.80 841.40

Shrawan Total 28.62 98.90 130.70 202.30 8,716.20 4,848.20 3,876.00 7,686.50 11,002.70 11,132.50 2043/044 2044/045 2045/046 2046/047 2047/048 2048/049 2049/050 2050/051 2051/052 2052/053 Fiscal Year 5 6 7 8 9 3 4 1 2 S. 10 N.

102 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 103 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077 - - - 1.55 2.21 8.58 2.89 6.48 7.84 4.60 86.55 12.53 41.55 12.26 10.45 12.07 Ashad 117.30 323.80 242.67 407.02 312.18 1,729.70 1,931.30 1,464.10 - 6.83 6.04 3.35 7.84 5.65 9.26 8.65 4.81 22.80 25.35 57.92 20.33 63.87 25.91 41.70 Jestha 317.05 478.90 774.40 278.72 131.48 1,536.30 1,266.30 3,056.30 - 5.40 6.97 7.34 2.11 11.40 91.05 43.14 45.80 61.85 79.80 57.00 33.73 12.25 10.38 424.12 181.70 270.67 431.56 Baisakh 1,039.40 1,106.20 2,386.90 1,715.90 1,159.00 4.50 8.42 4.14 69.15 55.17 88.54 37.99 11.58 11.23 134.50 266.00 158.09 401.41 116.14 181.83 346.39 167.63 Chaitra 1,287.60 1,974.90 2,989.20 1,610.89 1,871.70 1,196.89 1,005.10 - 5.01 6.19 7.31 7.55 8.59 4.07 82.85 63.90 21.57 23.85 881.30 363.55 386.20 202.77 491.28 369.01 223.20 Falgun 2,050.00 3,544.64 2,119.35 1,058.08 2,053.26 2,612.70 1.80 6.12 5.77 8.36 6.83 11.85 Magh 389.80 294.00 512.50 301.05 349.15 418.58 454.48 329.94 605.43 224.29 163.72 223.33 917.86 1,888.10 3,516.20 1,452.30 2,731.10 1,133.69 - 1.00 6.59 8.80 9.08 8.88 42.90 89.21 16.07 10.73 Poush 476.80 282.55 526.65 186.85 188.34 667.69 467.22 522.92 396.45 145.12 1,311.60 3,186.20 1,141.75 2,150.86 Actual Generation (MWh) - - 1.45 2.46 6.90 8.17 4.41 66.90 55.96 52.30 12.17 10.20 451.40 985.25 246.55 435.10 372.95 363.47 138.30 511.16 122.28 178.21 1,178.80 1,606.50 Mangsir - - 6.25 9.37 6.07 27.30 69.95 69.35 89.70 88.63 81.05 50.07 59.79 29.63 Kartik 300.60 922.60 539.90 252.30 248.21 127.16 443.84 155.06 104.53 1,033.10 - - - 1.10 2.40 0.51 6.38 7.68 7.02 9.95 4.81 78.10 43.75 87.62 Aswin 259.20 689.02 293.70 209.50 167.00 291.15 122.95 343.47 439.00 1,800.30 - 2.95 9.40 7.31 1.93 4.68 8.28 7.23 5.45 9.71 3.02 63.10 59.70 96.12 511.20 415.38 389.85 348.40 396.30 288.78 341.69 146.90 220.39 Bhadra 1,732.50 - - 8.50 1.55 3.46 2.20 5.33 1.43 7.75 5.93 7.25 3.35 10.30 60.63 82.85 25.98 28.43 503.00 316.10 382.40 234.50 284.05 332.70 1,519.20 Shrawan Total 57.09 269.30 617.89 122.09 325.99 127.19 115.75 9,366.30 5,197.05 3,045.05 1,119.35 2,192.82 3,520.76 3,021.17 1,308.72 3,734.37 3,416.86 1,332.98 8,868.62 4,768.92 1,254.55 18,681.80 24,203.64 11,065.64 155,456.52 2053/054 2054/055 2055/056 2056/057 2057/058 2058/059 2059/060 2060/061 2061/062 2062/063 2063/064 2064/065 2065/066 2066/067 2067/068 2068/069 2069/070 2070/071 2071/072 2072/073 2073/074 2074/075 2075/076 2076/077 Total Fiscal Year S. 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 N.

NEPAL ELECTRICITY AUTHORITY 103 Generation Directorate 2076/2077 12th Issue, 2077

GENERATION DEVELOPMENT DEPARTMENT

INTRODUCTION To accomplish its objective, GDD has a mandate to prepare policies and programs, to ensure the timely Generation Development Department (GDD) completion of under-construction projects, and has the main objective of performing regular submit it to the Generation directorate. Similarly, monitoring, inspection and resource management it provides necessary instructions to the projects of under-construction projects of Generation after performing regular monitoring and inspection; directorate. Presently, department is looking after submits timely reports of the projects’ budget and the construction of Kulekhani III hydropower progress to the directorate; performs essential project (14 MW), which is a cascade project of the record maintenance of projects’ resources, lands and only storage power plant, Kulekhani I, in Nepal. In buildings; prepares quadrimester progress report this fiscal year, the plant is under test operation from of the projects and submits it to the generation Ashoj and project will soon be taken over. directorate.

Control room of Kulekhani III hydro electric project

104 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 105 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077

UPPER TRISHULI 3A HYDROELECTRIC PROJECT

PROJECT DESCRIPTION due to the pandemic outbreak of Covid-19.

Construction of Upper Trishuli-3A HEP, a run-of- river project of 60 MW was initiated in June 2011. The estimated cost of the project is 125.775 Million US$ which is being funded by concessional loan from China Exim Bank. Contract for the major construction work (Civil, Electro-mechanical & Hydro-mechanical works) was signed with China Gezhouba Group Company Ltd., China (CGGC) at a cost of 89.177 Million US$ excluding VAT while construction supervision of the project was awarded to Northwest Engineering Corporation Limited, China (NWH), at a cost of 3.932 Million US$ excluding VAT. Contract for the Transmission line Matatirtha Terminal work was awarded to China International Water & The Plant Project has been handed over to Trishuli Electric Corporation (CWE) at a contract price of 22.6 3A Hydropower Station under Large Generation million US$ excluding VAT. Operation and Maintenance Department, Generation Directorate effective from December 01, 2019. MAIN PLANT PROJECT WORKS TRANSMISSION LINE WORKS To date main Contractor CGGC has almost completed the main works including Headworks, Intake, The total length of transmission line is 44.7 km (total Desander, Headrace Tunnel, Surge shaft, Vertical 142 numbers of towers), which comprises of 1.3 km shaft, Tailrace Tunnel, Tailrace Pond, Power house long (8 No of Towers) 132 kV double circuit from Auxilliary Building, GIS building with accessories GIS to Trishuli-3B hub, 38.6 km long (120 No of and facilities etc. From May 16, 2019 and from July Towers) 220 kV Double circuit from Trishuli-3B hub 31, 2019 the 72-hour generation test of Unit 1 (30 MW) to Badbhanjyang and 4.8 km long (14 No of towers) and Unit 2 (30 MW) have been started synchronizing 220kV four circuit from Badbhanjyang to Matatirtha, with the national grid. After the successful generation Kathmandu. In addition, about 1.35 km length of 220 tests, both Units are in continuous operation and kV four circuit underground cable route leading to supplying the electricity to Matatirtha Substation the Matatirtha Substation is also constructed. charged with 132kV. The Taking Over Certificate for the main plant works has been issued effective from Till date, all works of Transmission line have been August 30, 2019 and the Defect Liability Period is completed with Taking over Certificate (TOC) has running at present. However, some remaining and also been issued to the Contractor China International defect removing works have been seriously affected Water and Electric Corporation (CWE) on June 15,

NEPAL ELECTRICITY AUTHORITY 105 Generation Directorate 2076/2077 12th Issue, 2077

2019. At present it is carrying the power generated meter) form Upper Trihsuli 3A Hydroelectric Project. In The Operation of Transmission Line has been future this line is planned to carry the power from handed over to Kathmandu Grid Division under the Rasuwagadi, Sanjen and other power project of Transmission Directorate effective from August 05, the Trishuli Basin (220 kV Double circuit) and from 2019. Badbhanjyang(220kV Four Circuit) it will also carry the power from Marsyangdi corridor to Matatirtha OTHERS Substation. Under Project Support Program (PSP) the construction of Eight school buildings, implementation of water supply systems, upgrading of road from Trishuli to Champani, road improvement to Trishuli hospital, Supply of hospital equipment, and construction of Irrigation drainage works, pedestrian trails, various village roads and water supply systems in project- affected areas of Four District (Rasuwa, Nuwakot, Dhading and Kathmandu) are completed.

The construction works after the Gorkha Earthquake has been resumed from October 2017 and the remaining works were being undertaken at a rapid pace and TOC was issued effective from August 30, 2019. However, due to the pandemic outbreak of Covid-19 the defect removal works and construction of some outstanding works is affected. So, hoping for favorable conditions, it is planned to complete the main plant project works by the end of 2020.

Four circuit 220 KV Transmission Line (Tower Hight=103.30

106 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 107 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077

KULEKHANI III HYDROELECTRIC PROJECT

PROJECT DESCRIPTION result, first generating unit started test operation from 15 Ashoj 2076 (2 October 2019) and the second Kulekhani III Hydroelectric Project (14MW) is the from 24 Ashoj 2076 (11 October 2019). As of Asar cascade project of Kulekhani II hydroelectric plant 2077, a total of 20,365 MWh of electrical energy has which utilizes the regulated flow of Kulekhani been generated by the plant. reservoir. Additional water from Khani Khola is also utilized for the Project. The Project is located southwest of Kathmandu in Makawanpur district, Narayani zone, Bagmati Province. It is expected to generate about 40.85 Gwh of electrical energy per annum.

The Government of Nepal and Nepal Electricity Authority (NEA) funded the project. The total estimated cost of the Project is NRs. 4.63 billion.

The headworks site is located on the left bank of Khani Khola at Bhainse, about 11 km north of Hetauda. The

Powerhouse is located about 5 km north of Hetauda Switchyard of Kulekhani-III at Sanutar village adjacent to the Tribhuwan It was planned to take over the plant from the Highway. The Civil construction works have been Electromechanical contractor in March 2020 (Falgun completed by M/S Sinohydro Corporation, China 2076) after completing all the remaining peripheral while the contractor for the Electromechanical, works. However, that could not be materialized Hydromechanical & Transmission Line works is owing to the effect of global Covid-19 pandemic. M/S Zhejiang Jinlun Electromechanic Co. Ltd., The project will be taken over as soon as possible the China. The Consultant is M/S WAPCOS Ltd., India. situation improves. In spite of contractual handover/ PROJECT STATUS AS OF 2076/077 (2019/20) takeover process, the plant is in generating mode and supplying power to the INPS. The project was initiated in 2008 April with the contract award to the civil contractor while the contract for Electromechanical, Hydromechanical and Transmission Line works was awarded in 2010. Over the years, the project went through lot of complexities of various natures, which resulted in serious project delays. Nevertheless, every effort was exerted to resolve the issues, overcome the problems and complete the project as early as possible. As a

NEPAL ELECTRICITY AUTHORITY 107 Generation Directorate 2076/2077 12th Issue, 2077

TINAU-SUNDARIJAL HYDROPOWER STATION REHABILITATION PROJECT

INTRODUCTION

Nepal Electricity Authority has received loan (Loan Number 2808-NEP, Grants 0270-NEP and 0271- NEP) from Asian Development Bank (ADB) towards the cost of Power Efficiency Improvement as part of Electricity Transmission Expansion and Supply Improvement Project - a loan portion of which has been budgeted for Rehabilitation and upgrading of Sundarijal hydropower plant from 640 kW to 970kW. The construction contract for Sundarijal Hydropower Station Rehabilitation has been awarded in EPC model to Power-Mech Pentaflo Zillion JV firm on Sundarijal Dam after the installation of Trashrack April 2017. The rehabilitation works largely consists After successful testing and commissioning of unit of Electro-mechanical rehabilitation work with no. 2, it is now running in regular operation, fully modernization, automation of Plant Control with automated with PLC and operation/monitoring by SCADA System and civil improvement work at SCADA system. For the rehabilitation of Unit no. Nagmati Intake and Bagmati Headpond. The power 1, its Turbine-Generator has to dismantle soon to plant rehabilitation contract cost is INR 65,843,265.00. replace with new Turbine-Genertor. However, till Headpond of the Sundarijal hydropower plant has now the Unit no. 1 is also run through previously undergone rehabilitation as well as construction existed system whenever is required for additional of gabion structure weir with RCC structure drinking water supply, upon request from supported metallic trash rack. Rehabilitation and Kathmandu Upatyaka Khanepani Limited (KUKL). upgradation of unit no. 2 has been completed, which The rehabilitation and upgradation work for other has commissioned successfully in March 2020. The power plant - Tinau Hydropower Station located at other unit, Unit no. 1 rehabilitation work not been Butwal is under the study phase in consultation with able to continue because of lockdown-imposed NEA Engineering Co. with joint assistance of GoN situation due to Covid-19 pandemic. In fact, the and NEA. Currently, the feasibility study is being project was scheduled to complete by December done by the consultant with the alternative approach of 2019, however the excess time was consumed to upgrade the plant from 1 MW to 3 MW based on in high expertise retrofitting work of the new RCC the inception report of individual consultant. foundation for the turbine-generator (Unit no. 2) to tie up onto the surface of old PCC foundation.

108 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 109 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077

TECHNICAL SUPPORT DEPARTMENT

INTRODUCTIN also executes proper guidelines, supervision and monitoring works of various civil, mechanical and Technical Support Department, headed by Director, electrical related maintenance works at various NEA provides expert advice for the under-construction power plants. projects and existing power plants as required by the respective Projects, and, Operation and Maintenance This year, the department was engaged in the review Department. Deputy Managing Director (directorate of the report submitted by project development chief), Generation Directorate, co-ordinates between department for the rehabilitation of the civil the Technical Support Department and Projects/ structures of existing Trishuli hydropower station for Operation and Maintenance Department. generation improvement which is being obstructed with various waterways and sediment problems. Technical Support Department mainly serves for the technical assistance and support for the NEA projects which are under construction process and provides the much-needed expert advice to the arising problems of operational plants of NEA. Thus, this department deals with framework for operation and maintenance of NEA hydropower projects and

Cleaning of B-0 and Reservoir of Trishuli HPS during shutdown period Francis Turbine of Trishuli HPS

NEPAL ELECTRICITY AUTHORITY 109 Generation Directorate 2076/2077 12th Issue, 2077 Remarks Not available generation interruption Excluding Forced Outages Only Unit-2 is in operation Only Unit-.... is in operation Only Unit-.... is in operation Frequent system(i.e. India Nepal system) changing causes 7 0 0 0 0 2 2 0 0 46 19 21 15 26 56 N/A N/A N/A N/A N/A N/A N/A Times No. of - 0 0 0 0 0 0 3.6 4.3 70.5 0.73 2.87 7.53 1.56 N/A N/A N/A N/A N/A N/A N/A 27.18 18.25 Unit Trip ping hours 7 0 0 0 0 93 50 37 56 89 88 66 95 87 72 221 112 112 227 N/A N/A N/A Times No. of - 0 0 0 0 62.7 0.72 11.6 12.2 N/A N/A N/A 17.32 13.75 19.53 122.9 90.18 36.67 31.03 111.5 25.93 124.19 5,848.00 Plant Trip ping hours TRIPPING RECORD OF FY 2076/077 OF FY RECORD TRIPPING N/A N/A N/A Hours 6,847.80 7,061.69 4,364.30 4,630.68 2,912.00 5,463.93 7,525.36 20,126.92 13,950.62 20,898.20 14,909.43 11,958.45 49,183.15 12,611.30 22,481.89 22,220.58 12,702.47 23,469.00 11,446.45 Running 3x5 3x5 2x7 3x48 2x35 3x23 2x30 2x30 2x16 2x15 2x7.4 2x3.1 2x1.6 3x0.8 3x0.5 6x6.5 3x3.35 4x0.25 2x0.32 2x0.25 6x3.5 & 1x3 Total No. of 4x2.5 & 3x1.47 Units Installed 1 70 69 60 60 32 30 24 15 15 14 39 6.2 3.2 2.4 1.5 0.5 144 14.8 0.64 10.05 14.41 Total Installed Capacity (MW) Seti Fewa Modi Puwa Panauti Trishuli Gandak Chatara Devighat Sunkoshi Pharping Multifuel Sundarijal Chameliya Marsyandi Kulekhani I Kulekhani II Kulekhani III Hetauda Diesel Power Stations Kaligandaki ‘A’ Mid-Marsyangdi Upper Trishuli 3A 1 2 3 4 5 6 7 8 9 S. 10 11 12 13 14 15 16 17 18 19 20 21 22 N.

110 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 111 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077 Unit: MWh Total 833,643.99 433,869.81 464,734.93 135,082.79 101,062.18 24,218.05 69,600.62 59,536.82 37,052.17 1,560.57 2,908.36 10,051.25 1,959.55 4,589.00 2,179,870.11 97,904.80 45,861.85 143,766.65 2,323,636.75 Ashad 91,561.99 49,072.73 47,524.72 12,399.94 8,632.25 3,188.19 6,994.70 5,322.88 4,047.65 317.32 329.05 810.38 186.30 440.83 230,828.89 5,013.60 2,338.15 7,351.75 238,180.64 Jestha 87,709.48 44,774.95 46,942.32 12,671.92 9,210.55 2,054.46 8,195.48 5,628.15 3,025.48 246.87 191.19 664.80 131.24 346.65 221,793.53 7,264.90 3,514.37 10,779.27 232,572.80 Baishakh 47,205.01 32,205.41 35,739.67 11,817.04 8,665.54 250.00 5,622.91 4,044.17 2,054.23 161.19 165.04 682.10 91.91 256.88 148,961.09 13,236.10 6,146.60 19,382.70 168,343.80 Chaitra 31,582.86 24,224.80 28,373.84 9,744.70 8,079.05 741.76 4,444.20 3,443.86 1,744.93 108.33 134.84 909.29 121.65 260.53 113,914.65 15,730.10 7,606.30 23,336.40 137,251.04 Falgun 42,762.71 10,544.09 17,479.34 9,261.60 7,605.66 2,407.87 2,184.64 2,994.08 1,778.10 112.47 165.09 840.23 180.46 299.36 98,615.70 13,805.90 6,598.65 20,404.55 119,020.25 Magh 44,123.49 19,861.73 25,201.57 9,888.04 7,771.59 2,772.85 2,215.29 3,451.36 1,753.30 94.77 210.42 870.08 204.47 333.22 118,752.17 12,080.50 5,343.86 17,424.36 136,176.53 Poush 56,439.39 26,539.51 32,155.24 11,824.27 9,137.74 3,154.97 4,544.01 4,242.95 2,240.38 151.65 316.79 942.35 235.11 405.10 152,329.45 8,878.10 4,358.71 13,236.81 165,566.25 Mangsir 77,613.45 36,010.91 43,356.14 12,648.01 9,527.98 250.00 6,230.78 5,725.67 3,310.18 160.18 367.79 962.44 192.15 427.75 196,783.43 4,859.60 2,414.46 7,274.06 204,057.49 GENERATION DIRECTORATE GENERATION Kartik 87,553.41 45,466.60 47,492.69 8,336.32 6,029.99 405.58 8,510.15 6,806.34 4,245.40 207.80 473.65 900.28 160.19 448.90 217,037.31 3,581.30 1,575.50 5,156.80 222,194.11 Ashwin 89,600.11 47,571.90 46,286.73 12,217.57 8,912.44 3,303.61 8,681.39 6,290.72 4,178.62 - 554.50 822.46 160.50 451.85 29,032.40 4,370.50 1,838.05 6,208.55 35,240.96 GENERATION FORECAST FOR THE FY 2074/75 (FY 2017/18 A.D.) 2017/18 (FY FORECAST2074/75 FY THE FOR GENERATION Bhadra 92,719.95 48,402.66 46,723.69 12,052.20 8,680.56 2,960.08 6,914.73 5,845.01 4,286.24 - - 777.54 151.17 456.42 229,970.25 3,604.30 1,571.01 5,175.31 35,145.56 Shrawan 84,772.14 49,194.53 47,459.02 12,221.21 8,808.85 2,728.68 5,062.34 5,741.63 4,387.64 - - 869.30 144.41 461.50 221,851.24 5,479.90 2,556.19 8,036.09 229,887.33 Installed Capacity (MW) 144 70 69 24 15 15 14.8 10.05 6.2 3.2 2.4 1.5 1 0.64 376.79 60 32 92 468.79 Power Stations Kaligandaki A Middle Marsyangdi Marsyangdi Trisuli Devighat Gandak Modi Khola Sunkoshi Ilam (Puwa Khola) Chatara Panauti Seti Fewa Sundarijal A. TOTAL ROR Kulekhani I Kulekhani II B. Total Storage S. N. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Grand Total (A+B)

NEPAL ELECTRICITY AUTHORITY 111 Generation Directorate 2076/2077 12th Issue, 2077 Unit: MWh Total 865,075.00 437,286.87 447,490.30 62,131.00 31,754.10 52,459.58 121,316.50 17,495.80 66,422.70 86,238.79 55,050.50 35,790.53 22.25 1,112.34 10,186.74 1,911.68 4,332.29 - 2,296,076.97 15.78 127.19 142.96 2,296,219.93 Ashad 101,359.00 52,800.00 47,202.20 4,437.00 2,091.00 12,739.74 10,387.00 2,218.40 7,101.10 5,241.25 5,684.60 4,371.35 - 241.26 811.08 92.43 486.00 - 257,263.40 - 12.07 12.07 257,275.47 Jestha 82,633.00 47,447.87 48,696.90 6,428.00 3,051.60 12,292.57 10,528.00 54.50 7,231.70 7,327.03 4,736.30 3,871.75 - 153.45 702.09 - 306.66 - 235,461.42 - 9.26 9.26 235,470.68 Baishakh 50,251.00 27,266.25 31,968.80 12,669.00 6,364.30 8,966.13 9,873.00 - 4,361.50 7,166.19 3,248.10 2,440.20 - 120.37 886.23 - 224.66 - 165,805.73 - 12.25 12.25 165,817.98 Chaitra 40,748.00 21,243.75 24,396.60 12,845.00 6,523.10 7,261.59 9,115.70 890.20 1,028.30 6,753.05 2,783.20 1,432.73 - 100.63 883.62 102.27 221.00 - 136,328.74 1.08 8.42 9.49 136,338.23 Falgun 36,950.00 14,860.37 21,454.80 14,322.00 7,151.20 5,343.07 8,418.30 3,007.70 2,115.00 6,236.40 3,137.20 1,430.18 - 70.49 823.05 219.53 235.33 - 125,774.62 1.10 7.55 8.65 125,783.27 Magh 41,121.00 20,006.26 23,420.80 5,283.00 2,727.40 5,856.48 8,501.50 2,619.00 3,213.80 6,389.00 3,574.40 1,347.65 - 89.59 897.84 237.35 284.66 - 125,569.73 6.20 8.36 14.56 125,584.30 Poush 48,791.00 24,708.74 28,317.70 4,345.00 2,350.20 - 9,556.30 2,048.40 3,847.30 7,041.39 4,197.90 1,833.45 22.25 200.81 421.47 250.41 369.66 - 138,301.98 2.15 9.08 11.23 138,313.21 Mangsir 64,444.00 31,968.76 35,988.50 202.00 280.40 - 11,326.50 - 5,005.10 8,431.31 4,728.80 2,488.99 - 103.33 877.59 223.82 444.33 - 166,513.43 1.05 12.17 13.22 166,526.65 GENERATION DIRECTORATE GENERATION Kartik 92,307.00 44,467.37 46,168.50 225.00 266.30 - 12,007.90 1,022.00 7,746.90 8,827.25 6,618.70 4,231.79 - - 975.60 130.34 389.33 - 225,383.98 4.20 29.63 33.83 225,417.81 ACTUAL GENERATION FOR THE FY 2074/75 ( FY 2017/18 A.D.) 2017/18 ( FY 2074/75 FY THE FOR GENERATION ACTUAL Ashwin 102,818.00 50,314.75 48,568.00 202.00 236.90 - 10,999.80 2,151.80 10,200.20 8,294.65 5,895.00 4,224.08 - 32.42 1,019.61 243.39 406.00 - 245,606.59 - 7.02 7.02 245,613.61 Bhadra 101,928.00 51,020.62 45,978.30 313.00 185.20 - 9,649.00 - 7,349.20 6,707.18 5,271.40 4,234.64 - - 918.81 214.59 466.66 - 234,236.60 - 5.44 5.44 234,242.05 Shrawan 101,725.00 51,182.13 45,329.20 860.00 526.50 - 10,953.50 3,483.80 7,222.60 7,824.09 5,174.90 3,883.74 - - 969.75 197.55 498.00 - 239,830.75 - 5.93 5.93 239,836.68 Power Stations/ Month Kaligandaki ‘A’ Mid-Marsyangdi Marsyandi Kulekhani I Kulekhani II Chameliya Trishuli Gandak Modi Devighat Sunkoshi Puwa Chatara Panauti Seti Fewa Sundarijal Pharping Total (Hydro) Multifuel Hetauda Diesel S. N. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Total (Thermal) Grand Total

112 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 113 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077 Unit: MWh Total 825,252.04 444,915.41 471,309.63 184,200.00 137,613.64 93,195.47 33,360.19 70,971.48 58,188.00 36,053.52 3,546.40 3,400.78 10,564.25 2,990.36 4,033.83 2,379,594.99 108,554.73 48,690.99 157,245.73 ,536,840.72 Ashad 94,108.54 51,263.28 48,378.15 21,225.00 12,250.82 7,737.52 3,738.60 7,346.58 5,796.31 4,255.01 528.86 321.30 828.45 258.40 456.63 258,493.45 5,983.27 2,527.20 8,510.47 267,003.92 Jestha 85,854.18 46,076.20 48,461.93 17,570.00 12,395.09 8,822.84 2,135.03 8,216.00 5,188.00 3,543.31 411.44 207.10 814.37 175.74 343.05 240,214.27 7,547.07 3,429.91 10,976.98 251,191.24 Baishakh 60,467.79 30,934.41 35,257.45 11,970.00 11,381.28 6,963.95 1,124.65 4,875.19 3,811.67 2,043.59 268.65 166.26 876.52 124.07 238.08 171,826.65 13,058.47 5,919.46 18,977.92 190,804.57 Chaitra 47,679.66 22,779.70 26,986.72 9,005.00 9,735.45 7,576.80 1,715.14 3,226.38 3,283.51 1,511.98 180.56 137.43 901.67 183.90 230.40 135,566.58 15,111.53 7,087.35 22,198.89 57,765.46 Falgun 42,382.01 18,415.15 23,490.78 7,875.00 9,053.25 7,285.98 2,872.05 2,800.48 3,082.54 1,568.76 187.45 153.03 855.26 280.26 230.40 120,598.25 14,766.73 6,921.41 21,688.15 142,286.39 Magh 43,851.44 19,658.30 25,010.08 8,445.00 9,466.56 7,402.17 3,110.75 3,107.51 3,504.43 1,473.79 157.95 181.32 897.83 305.73 222.72 126,904.20 13,744.73 6,105.53 19,850.26 146,754.46 Poush 55,349.64 26,212.00 31,867.94 10,695.00 11,073.60 7,598.20 3,382.36 4,019.71 4,301.09 1,930.86 252.75 296.83 791.55 365.74 230.40 159,604.47 11,074.87 5,150.84 16,225.71 175,830.18 Mangsir 73,657.55 34,611.55 41,880.86 14,285.00 12,565.77 8,607.00 1,748.93 5,349.65 5,309.29 2,764.53 266.96 315.57 934.56 322.89 259.02 203,768.08 5,931.20 2,708.46 8,639.66 212,407.74 GENERATION DIRECTORATE GENERATION Kartik 66,994.29 45,310.11 47,627.68 19,110.00 12,961.83 8,202.42 2,502.37 8,397.84 6,337.54 4,255.81 346.33 365.86 943.50 251.36 445.47 247,029.46 4,591.53 1,918.13 6,509.66 253,539.12 Ashwin 61,637.85 49,274.11 47,765.34 21,225.00 12,386.15 8,043.49 3,882.79 9,717.84 5,918.30 4,191.53 599.84 461.68 957.08 255.63 450.50 61,538.03 5,375.67 2,165.35 7,541.02 69,079.05 GENERATION FORECAST FOR THE FY 2075/76 (FY 2018/19 A.D.) 2018/19 (FY FORECAST2075/76 FY THE FOR GENERATION Bhadra 97,004.15 49,868.31 47,148.08 21,225.00 11,916.96 8,228.76 3,050.80 7,488.40 5,792.32 4,293.00 345.61 442.54 864.75 236.08 459.95 58,364.70 4,722.33 1,885.95 6,608.28 64,972.98 Shrawan 96,264.94 50,512.29 47,434.63 21,570.00 12,426.91 6,726.34 4,096.73 6,425.91 5,863.00 4,221.37 - 351.85 898.71 230.55 467.21 59,529.29 6,647.33 2,871.40 9,518.73 269,048.02 Installed Capacity (MW) 144 70 69 30 24 15 15 14.8 10.05 6.2 3.2 2.4 1.5 1 0.64 406.79 60 32 92 498.79 Power Stations Kaligandaki A Middle Marsyangdi Marsyangdi Chameliya Trisuli Devighat Gandak Modi Khola Sunkoshi Ilam (Puwa Khola) Chatara Panauti Seti Fewa Sundarijal A. TOTAL PROR/ROR Kulekhani I Kulekhani II B. Total Storage Grand Total (A+B) S. N. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

NEPAL ELECTRICITY AUTHORITY 113 Generation Directorate 2076/2077 12th Issue, 2077 Unit: MWh Total 871,914.00 471,322.51 475,176.00 91,184.00 44,676.70 161,395.54 123,741.10 11,950.80 69,400.50 86,851.14 62,156.70 34,192.81 2,698.25 3,005.84 10,030.00 1,531.68 3,587.30 - 16,185.60 2,541,000.46 - 115.74 115.74 2,541,116.21 Ashad 95,726.00 46,777.75 43,892.90 12,973.00 6,547.80 18,913.42 11,528.60 1,176.90 7,115.00 7,995.60 6,283.30 3,335.09 198.75 93.91 661.95 98.42 248.00 - 12,837.60 276,403.98 - 7.84 7.84 276,411.83 Jestha 99,146.00 49,417.50 52,096.70 16,616.00 8,124.60 17,908.78 11,487.60 479.50 8,286.70 8,302.23 7,114.30 2,517.80 421.25 30.21 708.39 - 211.67 - 3,348.00 286,217.22 - 8.65 8.65 286,225.88 Baishakh 88,709.00 48,551.10 47,422.20 20,932.00 10,043.00 18,363.55 9,044.10 - 6,907.60 6,523.64 6,044.20 2,565.89 115.25 173.17 909.81 115.53 215.67 - - 266,635.70 - 10.38 10.38 266,646.08 Chaitra 55,593.00 29,473.10 31,695.80 13,504.00 6,440.90 12,686.36 9,840.00 732.20 3,807.80 7,226.96 3,864.90 1,948.12 212.00 129.06 802.30 209.30 209.67 - - 178,375.47 - 11.23 11.23 178,386.70 Falgun 44,728.00 22,842.30 24,811.50 2,710.00 1,359.80 7,861.39 9,732.50 1,703.00 2,660.90 7,076.75 3,316.70 1,834.42 223.50 163.79 761.80 223.80 226.33 - - 132,236.48 - 8.59 8.59 132,245.06 Magh 43,580.00 21,058.00 25,314.00 5,390.00 2,753.90 6,609.75 10,069.00 869.90 2,656.90 7,371.98 3,305.50 1,433.26 289.50 176.54 815.00 190.00 229.66 - - 132,112.89 - 11.85 11.85 132,124.74 Poush 48,224.00 24,471.60 27,926.50 5,878.00 3,030.20 8,507.10 9,867.80 1,616.40 3,343.10 7,362.30 4,093.70 1,862.38 362.25 214.08 922.86 39.28 240.00 - - 147,961.55 - 10.73 10.73 147,972.28 Mangsir 63,726.00 32,082.20 36,038.30 2,249.00 1,156.30 10,862.10 11,178.70 - 4,749.20 6,268.39 5,114.40 2,317.63 354.25 262.05 806.22 89.09 231.33 - - 177,485.16 - 10.20 10.20 177,495.36 GENERATION DIRECTORATE GENERATION Kartik 67,913.00 44,704.70 46,863.20 1,349.00 701.40 15,820.60 10,652.50 213.50 6,801.60 7,844.55 6,934.40 3,747.97 447.75 361.89 885.33 67.96 382.00 - - 215,691.34 - 9.37 9.37 215,700.71 ACTUAL GENERATION FOR THE FY 2075/76 ( FY 2018/19 A.D.) 2018/19 ( FY 2075/76 FY THE FOR GENERATION ACTUAL Ashwin 65,650.00 51,614.00 48,936.50 2,209.00 1,054.30 21,010.62 10,446.10 1,659.80 9,937.50 7,294.98 6,450.80 4,357.75 73.75 504.66 924.30 234.24 453.66 - - 232,811.96 - 9.95 9.95 232,821.91 Bhadra 98,017.00 49,500.13 44,981.20 2,894.00 1,370.50 13,272.40 11,158.70 1,599.90 7,106.70 7,558.92 5,146.30 3,859.84 - 464.00 904.77 157.01 468.99 - - 248,460.36 - 9.71 9.71 248,470.07 Shrawan 100,902.00 50,830.13 45,197.20 4,480.00 2,094.00 9,579.47 8,735.50 1,899.70 6,027.50 6,024.84 4,488.20 4,412.66 - 432.49 927.27 107.05 470.33 - - 246,608.34 - 7.25 7.25 246,615.59 Power Stations/Month Kaligandaki ‘A’ Mid-Marsyangdi Marsyandi Kulekhani I Kulekhani II Chameliya Trishuli Gandak Modi Devighat Sunkoshi Puwa Chatara Panauti Seti Fewa Sundarijal Pharping Upper Trishuli 3A project Total (Hydro) Multifuel Hetauda Diesel Total (Thermal) Grand Total S. N. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

114 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 115 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077 Total Unit: MWh 882,860.66 463,473.21 477,698.55 489,760.00 181,437.65 138,964.17 97,749.31 18,631.25 73,253.95 60,523.27 34,642.57 4,166.00 3,616.31 10,478.86 2,699.58 2,921.47 2,942,876.81 103,926.41 86,864.07 190,790.48 3,133,667.29 Ashar 92,595.69 50,134.72 46,756.97 43,625.00 21,072.67 12,567.15 8,189.58 2,047.95 7,396.54 5,922.29 3,967.43 425.99 256.51 784.98 243.17 408.28 296,394.92 5,989.47 9,813.06 15,802.53 312,197.45 Jestha 91,332.73 47,225.87 49,735.95 43,625.00 18,626.36 12,695.47 8,867.26 1,279.76 8,734.97 5,949.96 2,540.42 411.50 158.78 804.88 165.98 330.79 292,485.68 8,016.27 9,716.59 17,732.86 310,218.54 Baisakh 75,274.20 40,305.11 42,241.14 42,170.00 15,925.11 11,158.06 8,047.13 672.84 5,902.48 5,013.03 2,196.93 229.98 173.18 878.63 143.89 260.74 250,592.45 13,654.87 4,761.82 18,416.69 269,009.14 Chaitra 52,337.41 25,949.41 29,071.16 36,355.00 11,387.96 10,038.43 7,086.03 950.56 3,879.89 3,611.08 1,692.67 202.15 139.09 875.97 201.04 262.09 184,039.94 14,906.67 4,151.00 19,057.67 203,097.61 Falgun 40,114.09 20,738.07 24,171.03 31,185.00 8,261.60 9,602.87 7,201.36 1,560.35 2,917.97 3,142.05 1,770.94 187.91 163.24 836.38 265.95 254.13 152,372.94 13,644.73 3,014.12 16,658.85 169,031.79 Magh 44,455.04 20,043.55 25,209.07 33,310.00 7,903.74 10,019.27 7,646.21 1,567.54 2,984.42 3,426.83 1,507.98 211.38 192.78 873.42 276.88 192.00 159,820.11 12,824.60 5,851.27 18,675.87 178,495.98 Poush 54,884.69 26,195.15 31,218.45 40,650.00 10,081.10 11,158.06 8,389.44 1,931.18 3,898.22 4,248.40 1,930.74 285.36 268.72 914.56 281.40 145.92 196,481.39 10,099.53 7,263.72 17,363.25 213,844.64 Mangsir 72,841.80 34,694.42 41,167.26 43,625.00 13,202.23 12,583.05 8,643.05 1,077.22 5,360.41 5,345.97 2,707.06 280.94 317.73 907.85 262.07 122.88 243,138.94 5,443.40 9,154.81 14,598.21 257,737.15 GENERATION DIRECTORATE GENERATION Kartik 81,662.71 45,950.47 47,465.29 43,625.00 18,338.57 12,670.13 9,089.73 1,358.01 8,387.88 6,439.53 3,433.60 374.07 412.73 917.13 218.79 230.40 280,574.04 4,024.80 6,241.43 10,266.23 290,840.27 GENERATION FORECAST FOR THE FY 2076/77 (FY 2019/20 A.D.) 2019/20 (FY FORECAST2076/77 FY THE FOR GENERATION Ashwin 84,977.66 50,839.29 47,553.78 43,625.00 22,173.70 12,283.88 8,562.95 2,121.53 9,909.25 6,046.62 4,324.58 477.76 531.73 929.65 238.61 230.40 294,826.39 4,767.67 3,325.39 8,093.06 302,919.45 Bhadra 96,192.15 50,301.21 46,313.17 43,625.00 18,111.14 12,394.39 7,810.11 1,892.30 7,607.00 5,685.26 4,200.15 507.08 509.52 864.32 208.09 238.08 296,458.97 4,309.53 5,402.49 9,712.02 306,170.99 Shrawan 96,192.49 51,095.94 46,795.28 44,340.00 16,353.47 11,793.41 8,216.46 2,172.01 6,274.92 5,692.25 4,370.07 571.88 492.30 891.09 193.71 245.76 295,691.04 6,244.87 18,168.37 24,413.24 320,104.28 Power Stations Kaligandaki ‘A’ Mid-Marsyangdi Marsyandi Upper Trishuli 3A Chameliya Trishuli Devighat Gandak Modi Sunkoshi Puwa Chatara Panauti Seti Fewa Sundarijal A. Total PROR/ROR Kulekhani I Kulekhani II B. Total Storage Grand Total (A+B) 1 2 3 4 5 6 7 8 9 S. 10 11 12 13 14 15 16 17 18 N.

NEPAL ELECTRICITY AUTHORITY 115 Generation Directorate 2076/2077 12th Issue, 2077 Total 871,466.00 446,624.75 443,852.10 407,551.15 162,972.00 81,483.40 160,811.64 128,973.11 10,337.60 66,913.20 92,053.14 20,365.20 62,245.94 34,914.55 1,822.00 2,886.76 11,158.29 2,126.54 2,814.76 0.00 3,011,372.13 2.52 57.09 59.61 3,011,431.74 Unit in MWh Ashar 92,429.00 48,654.20 45,257.70 35,122.50 18,411.00 9,267.10 13,832.37 10,635.82 940.80 6,563.10 7,615.45 3,372.60 5,054.78 3,895.58 246.75 168.49 958.59 115.97 356.35 - 302,898.15 0.70 4.60 5.30 302,903.46 Jestha 97,224.00 48,963.80 46,652.60 44,590.00 18,230.00 9,122.45 18,667.42 11,515.92 228.60 8,392.20 7,333.49 3,301.20 6,372.66 2,046.75 173.75 144.38 872.37 4.64 330.57 - 324,166.79 0.00 4.81 4.81 324,171.60 Baisakh 72,132.00 35,495.50 38,577.50 40,357.50 8,934.00 4,519.90 13,566.42 10,723.94 0.00 5,813.60 6,916.73 1,626.60 4,850.88 1,976.67 305.50 209.28 1,026.54 138.76 308.36 - 247,479.68 0.00 2.11 2.11 247,481.79 Chaitra 53,715.00 24,296.50 26,125.10 31,237.50 7,788.00 3,964.25 9,991.30 9,202.63 726.30 3,445.80 6,809.92 1,410.00 3,468.87 1,598.11 360.00 71.87 1,011.15 29.19 297.84 - 185,549.33 0.00 4.14 4.14 185,553.46 Falgun 38,692.00 22,192.40 25,269.00 30,482.50 5,655.00 2,878.64 8,465.86 9,352.41 1,438.80 3,268.30 6,832.15 1,037.40 3,405.93 1,581.43 268.00 134.26 1,005.12 208.67 190.33 - 162,358.20 0.70 4.07 4.77 162,362.97 Magh 43,666.00 23,203.10 26,595.00 33,052.50 10,978.00 5,588.30 8,033.88 9,975.67 1,680.50 3,012.40 7,359.52 1,996.80 3,563.31 1,855.95 26.50 197.90 937.71 326.46 139.67 - 182,189.16 0.00 6.82 6.82 182,195.98 Poush 49,345.00 26,420.50 30,027.40 38,417.50 13,628.00 6,891.44 8,026.22 10,895.38 736.00 3,650.30 8,058.64 2,465.40 4,252.82 2,289.15 0.00 251.50 972.18 353.00 134.33 - 206,814.76 0.00 8.88 8.88 206,823.64 Mangsir 66,111.00 35,598.75 40,354.90 41,909.75 17,176.00 8,401.25 11,345.54 11,817.37 0.00 5,941.40 8,863.56 3,092.40 5,906.40 2,946.42 0.00 317.80 995.04 231.96 99.99 - 261,109.53 0.18 4.41 4.59 261,114.12 GENERATION DIRECTORATE GENERATION Kartik 80,846.00 40,775.75 40,075.60 39,713.00 11,710.00 5,772.90 14,665.78 11,804.85 559.10 7,505.40 8,631.96 1,800.60 6,849.80 3,378.76 0.00 357.32 920.79 157.25 214.00 - 275,738.86 0.34 6.07 6.41 275,745.27 ACTUAL GENERATION FOR THE FY 2076/77 ( FY 2019/20 A.D.) 2019/20 ( FY 2076/77 FY THE FOR GENERATION ACTUAL Ashwin 83,278.00 38,733.70 35,862.00 34,801.00 6,239.00 3,140.70 17,791.00 11,120.72 1,447.20 5,364.30 7,907.87 262.20 6,856.30 4,330.12 0.00 336.08 876.96 186.14 239.33 - 258,772.62 0.00 4.81 4.81 258,777.43 Bhadra 95,071.00 50,778.80 44,295.50 27,443.00 10,136.00 5,437.33 19,959.74 10,143.00 977.00 6,114.80 7,303.76 0.00 5,578.10 4,504.98 118.00 361.41 940.05 231.90 248.00 - 289,642.36 0.60 3.02 3.62 289,645.98 Shrawan 98,957.00 51,511.75 44,759.80 10,424.40 34,087.00 16,499.14 16,466.11 11,785.40 1,603.30 7,841.60 8,420.09 0.00 6,086.10 4,510.63 323.50 336.48 641.79 142.60 256.00 - 314,652.68 0.00 3.35 3.35 314,656.03 Power Stations Kaligandaki ‘A’ Mid-Marsyangdi Marsyandi Upper Trishuli 3A Kulekhani I Kulekhani II Chameliya Trishuli Gandak Modi Devighat Kulekhani III Sunkoshi Puwa Chatara Panauti Seti Fewa Sundarijal Pharping Total (Hydro) Multifuel Hetauda Diesel Total (Thermal) Grand Total 1 2 3 4 5 6 7 8 9 S. 10 11 12 13 14 15 16 17 18 19 20 21 22 N.

116 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 117 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077 - 1.73 2.28 1.27 0.19 2.55 2.04 2.54 2.31 8.37 3.56 2.22 3.24 4.59 4.72 0.96 1.87 21.05 17.93 K=I/D 492.27 26,896.92 (Rs./Unit) Generation Cost (In thousand NRs) - - 0.38 0.34 0.27 0.11 1.30 0.86 0.39 1.23 5.63 1.89 1.17 2.21 3.17 3.86 0.62 15.40 15.74 J=F/D 461.24 10,014.76 Operation Cost (Rs/Unit)

(Rs)" I=F+G+H "Total Cost 1,505,269.57 1,017,039.12 565,147.61 79,344.72 416,144.15 166,094.21 408,123.86 298,190.64 86,510.64 238,449.82 204,405.01 201,855.91 160,368.89 38,347.88 51,758.57 62,668.60 2,698.93 - 67,780.23 28,105.45 5,598,303.80 -

H tion (Rs)" "Deprecia 562,607.41 810,071.41 138,088.48 - 56,613.30 19,758.06 325,254.40 46,262.57 8,048.72 61,452.56 32,720.98 13,814.85 24,587.90 6,105.61 2,363.66 1,697.38 - - 42,543.03 1,771.90 2,153,762.23

G (Rs)" "Royalty 614,483.54 55,215.90 306,732.30 33,347.76 147,890.78 75,973.59 20,371.67 93,632.78 20,212.90 50,667.91 63,809.05 43,559.95 25,061.62 4,179.19 3,954.02 9,746.09 2,698.93 - - - 1,571,537.96 - F ture (Rs) O & M Expendi 328,178.62 151,751.81 120,326.83 45,996.95 211,640.07 70,362.55 62,497.78 158,295.30 58,249.02 126,329.36 107,874.98 137,567.83 110,719.36 28,063.09 45,440.89 51,225.13 - - 25,237.20 26,333.55 1,866,090.33

E (Rs)" GENERATION DIRECTORATE GENERATION "Fixed Assets 25,323,311.34 28,712,523.75 6,212,631.25 29,522.11 2,888,907.54 911,894.21 14,704,062.12 1,898,393.21 444,003.75 2,180,207.64 1,374,869.94 375,991.80 1,100,985.14 255,993.86 104,808.09 48,972.29 - - 1,698,128.51 80,350.70 88,345,557.26090 D (MWh) Generation 871,466.00 446,624.75 443,852.10 407,551.15 162,972.00 81,483.00 160,811.64 128,973.11 10,337.60 66,913.20 92,053.14 62,245.94 34,914.55 1,822.00 2,886.76 13,284.83 2,814.76 - 2.52 57.09 2,991,066.14 OPERATION AND GENERATION COST FOR THE FISCAL YEAR 2076/077 (2019/2020) FISCAL THE COST FOR YEAR 2076/077 AND GENERATION OPERATION C Total Installed Capacity (MW) 144.00 70.00 69.00 60.00 60.00 32.00 30.00 24.00 15.00 14.80 15.00 10.05 6.20 3.20 2.40 2.50 0.64 0.50 39.00 14.41 612.70 B HPS Total * The Energy generation and Cost data is calculated excluding Kulekhani III HEP, which yet to be capitalized into a Hydropower Station Cental Account, Payment Section, Account Division-Generation Directorate * Sundarijal HPS and Pharping Expenditure are perfomed through the Accounts Division of Directorate itself, hence invidual expenditure not shown

Kaligandaki A HPS Middle marsyangdi HPS Marsyangdi HPS Upper Trishuli 3A Kulekhanai I HPS Kulekhani II HPS Chameliya HPS Trishuli HPS Gandak HPS Modikhola HPS Devighat HPS Sunkoshi HPS Ilam (Puwakhola) HPS Chatara HPS Panauti HPS Setifewa HPS Sundarijal HPS Pharping HPS Multifuel Thermal Plant Hetauda Diesel Plant 1 2 3 4 5 6 7 8 9 A 10 11 12 13 14 15 16 17 18 19 20 S.N Source:

NEPAL ELECTRICITY AUTHORITY 117 Generation Directorate 2076/2077 12th Issue, 2077

GENERATION DIRECTORATE GENERATION RELATED STATISTICS AND PERFORMANCE FACTORS OF FY 2076/77 (FY 2019/20)

S. Power Stations Total Design Actual Generation (MWh) Max. generation Generation Import in PH Power Station Energy Net Energy Local Station/ Total Energy Power Plant Factor Actual N. Installed Generation in a year till date Target in FY Switchyard Available Transmission Transmission Distribution Internal Power Loss Station (%) Generation/ Capacity (MWh) (MWh) 2076/77 (MWh) (MWh) Energy to Grid to Grid (MWh) Consumption Utilization (MWh) Loss Design (MWh) (MWh) (MWh) (MWh) (MWh) (%) Generation FY 2074/75 FY 2075/76 FY 2076/77 ratio (%)

A/(Installed P a A b B C=A+B D D-B E F G=D+E+F L=C-G (C-G)/C capacity (A/a)*100 *365*24)*100

1 Kaligandaki ‘A’ 144 842,000.00 865,075.00 871,914.00 871,466.00 929,983.00 (2071/72) 882,860.66 296,306.56 1,167,772.56 1,162,899.55 866,592.99 886.69 1,810.66 1,165,596.90 2,175.66 0.19 68.64 103.5

2 Mid-Marsyangdi 70 398,000.00 437,286.87 471,322.51 446,624.75 471,322.51 (2075/76) 463,473.21 366,134.54 812,759.29 794,945.65 428,811.11 107.06 1,191.28 796,243.99 16,515.30 2.03 72.37 112.22

3 Marsyandi 69 462,500.00 447,490.30 475,176.00 443,852.10 483,928.20 (2052/53) 477,698.55 484,458.00 928,310.10 906,033.40 421,575.40 0 4,420.87 910,454.27 17,855.83 1.92 73.13 95.97

4 Upper Trishuli 3A 60 489,760.00 - 16,185.60 407,551.15 407,551(2076/77) 489,760.00 7.2 407,558.35 402,815.82 402,808.62 0 821.8 403,637.62 3,920.73 0.96 77.79 83.21

5 Kulekhani I 60 211,000.00 62,131.00 91,184.00 162,972.00 249,680.00 (2056/57) 103,926.41 119,866.42 282,838.42 272,926.23 153,059.81 8,319.42 512.15 281,757.80 1,080.62 0.38 30.74 77.24

6 Kulekhani II 32 104,600.00 31,754.10 44,676.70 81,483.40 122,757.00 (2056/57) 86,864.07 238.77 81,722.17 80,989.34 80,750.57 0 201.35 81,190.69 531.48 0.65 28.82 77.9

7 Chameliya 30 184,200.00 52,459.58 161,395.54 160,811.64 161395.54(2075/76) 181,437.65 63,402.29 224,213.93 221,101.90 157,699.61 1,011.23 260.16 222,373.29 1,840.64 0.82 60.82 87.3

8 Trishuli 24 163,000.00 121,316.50 123,741.10 128,973.11 154,423.75 (2053/54) 138,964.17 175,331.17 304,304.28 277,191.47 101,860.30 16,416.14 261.88 293,869.49 10,434.79 3.43 61.35 79.12

9 Gandak 15 106,380.00 17,495.80 11,950.80 10,337.60 52,272.70 (2043/44) 18,631.25 96,038.43 106,376.03 - - 91,487.56 701.93 107,275.13 - - 7.9 9.72

10 Modi 14.8 92,500.00 66,422.70 69,400.50 66,913.20 69,556.40 (2073/74) 73,253.95 113,761.58 180,674.78 177,204.87 63,443.29 2,381.25 613.93 180,200.05 474.73 0.26 51.25 72.34

11 Devighat 15 114,000.00 86,238.79 86,851.14 92,053.14 106,277.70 (2056/57) 97,749.31 58,063.60 150,116.74 114,509.50 56,445.90 34,984.93 169.5 149,663.93 452.81 0.3 70.14 80.75

12 Kulekhani III 14 40,850.00 0 0 20,365.20 20365.2 0 20,365.20 20,109.60 20,109.60 0 215.99 20,325.59 39.61 0.19 16.66 49.85

13 Sunkoshi 10.05 70,000.00 55,050.50 62,156.70 62,245.94 66,383.10 (2068/69) 60,523.27 194.5 62,440.44 59,850.48 59,655.98 2,058.97 305.47 62,214.92 225.51 0.36 70.52 88.92

14 Puwa 6.2 48,000.00 35,790.53 34,192.81 34,914.55 36,414.24 (2073/74) 34,642.57 6.5 34,921.05 34,864.37 34,857.87 0 50.18 34,914.55 6.5 0.02 64.05 72.74

15 Chatara 3.2 6,000.00 22.25 2,698.25 1,822.00 5,219.75 (2063/64) 4,166.00 807.85 2,629.85 1,112.08 304.23 1,488.89 12.05 2,613.02 16.84 0.64 6.4 30.37

16 Panauti 2.4 6,970.00 1,112.34 3,005.84 2,886.76 4,654.80 (2058/59) 3,616.31 4.6 2,891.36 2,834.49 2,829.89 0 14.27 2,848.76 42.59 1.47 13.74 41.42

17 Seti 1.5 9,800.00 10,186.74 10,030.00 11,158.29 11,616.19 (2067/68) 10,478.86 3.03 11,161.32 10,369.31 10,366.28 0 42.96 10,412.27 749.05 6.71 85.15 113.86

18 Fewa 1 6,500.00 1,911.68 1,531.68 2,126.54 3,919.47 (2034/35) 2,699.58 - 2,126.54 - - -- 10.65 - - - 24.6 32.72

19 Sundarijal 0.64 4,770.00 4,332.29 3,587.30 2,814.76 4,530.26 (2071/72) 2,921.47 0 2,814.76 2,808.10 2,808.10 0 6.66 2,814.76 0 0 49.88 59.01

20 Pharping 0.5 - - - - 48.65(2064/65) ------

Total (Hydro) 573.29 3,360,830.00 2,296,076.97 2,541,000.47 3,011,372.13 - 3,133,667.29 1,774,625.03 4,785,997.16 4,542,566.16 2,863,979.56 159,142.14 11,623.74 4,728,407.04 57,590.13 1.2 59.96 89.6

21 Multifuel 39 - 15.78 - 2.52 86,215.07 (2055/56) - - 2.52 ------0 -

22 Hetauda Diesel 14.41 - 127.19 115.74 57.09 24,203.64 (2055/56) - - 57.09 47.23 47.23 - 9.87 57.1 - - 1.03 -

Total (Thermal) 53.41 - 142.97 115.74 59.61 - - 0 59.61 47.23 47.23 0 9.87 57.1 2.51 4.21 0 -

Grand Total 626.7 3,360,830.00 2,296,219.94 2,541,116.21 3,011,431.74 - - 1,774,625.03 4,786,056.77 4,542,613.39 2,864,026.78 159,142.14 11,633.61 4,728,464.14 57,592.63 1.2 0.56 89.6

Note: “-” Indicates metering problem or data unavailability

Total system energy 7874.85 GWh

Total Loss in Powerhouse 57.59 GWh

System Loss percentage 0.73%

118 NEPAL ELECTRICITY AUTHORITY NEPAL ELECTRICITY AUTHORITY 119 Generation Directorate 2076/2077 Generation Directorate 2076/2077 12th Issue, 2077