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Generation Performance in Sri Lanka] 2015 (First Half)

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Generation Performance in Sri Lanka] 2015 (First Half) Generation Performance in Sri Lanka Generation Performance 2014 (First Half) in Sri Lanka 2015 (First Half) PUBLIC UTILITIES COMMISSION OF SRI LANKA Content Chapter 1 – Introduction 1 Chapter 2 – Energy Generation 2 Chapter 3 – System Peak Demand 5 Chapter 4 – Load Factor 5 Chapter 5 – Plant Factor 6 Chapter 6 – Running Plant Factor 10 Chapter 7 – Generation Cost 12 7.1 - Amount Paid in Excess of Capacity and Energy Charges 13 Chapter 8 – Comparison of Scheduled Dispatch and Actual Dispatch 13 Chapter 9 – Auxiliary Consumption 14 Chapter 10 – Availability Factor 14 Chapter 11 – Reservoir Storages 16 Chapter 12 – Conclusion 18 [Generation Performance in Sri Lanka] 2015 (First Half) 1. Introduction During the first half of year 2015, maximum recorded electricity demand in Sri Lanka was 2210.4MW (excluding the contribution of SPP Mini Hydro, Solar and Biomass) which is a higher value compared to the maximum demand of 2151.7MW in year 2014. In order to reach this demand and to cater the electricity requirement in Sri Lanka, altogether 196 Grid connected power plants with total installed capacity of 3917MW have been operated in the first half of 2015. Out of these power plants 27 have been owned and operated by Ceylon Electricity Board including 17 hydro plants, 9 thermal plants and 1 wind power plant. Withal, 6 thermal power plants have been operated by Independent Power Producers (IPPs) and 163 renewable power plants have been operated by Small Power Producers (SPPs) including mini hydro plants, solar power plants, wind power plants and biomass power plants. Out of the above, 5 renewable power plants have been commissioned in the first half of 2015 to strengthen the generation capacity of the country. Also, the contract period of the private power plants ACE Power Embilipitiya and Colombo Power Barge expired by April and June 2015 respectively. The chart below shows the existed installed capacities in MW of each type of power plants by the end of June 2015. Generation Capacity Mix in MW 450 CEB Hydro 484 1380 CEB Thermal-Oil CEB Thermal-Coal IPP Thermal 900 516 Renewable This Generation Performance Report contains a summary of information and performance statistics of the generation units and electricity network in Sri Lanka for the first half of year 2015. All the index and other calculations in this report have been done based on the data received through Licensee Information Submission System (LISS) and details obtained from CEB Monthly Operational Data Reports. 1 | P a g e [Generation Performance in Sri Lanka] 2015 (First Half) 2. Energy Generation All grid connected generation plants sell their power to the only transmission licensee in Sri Lanka to deliver the power to the consumers through distribution licensees. The chart and graph below shows the semiannual generation figures in 2015 in GWh. Jan Feb Mar Apr May Jun Total CEB Hydro 499 361 312 383 481 326 2,361 CEB Oil 25 70 91 41 14 121 361 CEB Coal 393 389 528 485 493 380 2,667 IPP 31 63 131 31 7 140 403 Renewable 94 79 61 97 136 139 607 Total 1,041 962 1,123 1,036 1,132 1,106 6,400 Source :LISS The chart below shows the generation mix in Sri Lanka for the first six months of 2015. Electricity Generation Mix- First Half of 2015 6% 9% 37% CEB Hydro CEB Thermal-Oil CEB Thermal-Coal 42% IPP Thermal 6% Renewable Total Generation : 6400GWh 2 | P a g e [Generation Performance in Sri Lanka] 2015 (First Half) The chart below shows the generation mix in Sri Lanka for the first six months of 2014. Electricity Generation Mix- First Half of 2014 6% 19% CEB Hydro 33% 19% CEB Thermal-Oil CEB Thermal-Coal 24% IPP Thermal Renewable Total Generation : 6086GWh The chart below shows the monthly variation of generation mix in Sri Lanka during the first six months of 2015. Monthly Variation of Electricity Generation Mix GWh 600 500 CEB Hydro 400 CEB Oil CEB Coal 300 IPP Renewable 200 100 0 Jan Feb Mar Apr May Jun 3 | P a g e [Generation Performance in Sri Lanka] 2015 (First Half) The following chart shows the daily variation of generation mix in Sri Lanka during the first six months of 2015. Daily Variation of Generation Mix 2015 GWh 45 40 35 30 25 IPP 20 CEB Coal 15 CEB Oil 10 CEB Hydro 5 0 Note: Daily generation data of renewable power plants is not included. The following chart shows the variation of generation mix in Sri Lanka over the past few years. 3500GWh 3000 2500 CEB Hydro 2000 CEB Oil CEB Coal 1500 IPP 1000 Renewable 500 0 4 | P a g e [Generation Performance in Sri Lanka] 2015 (First Half) 3. System Peak Demand CEB System Control records the daily peak power demand of the country. Daily variation of country’s system peak demand during the first half of the year 2015 is depicted by the following graph. Peak Demand Variation 2015 MW 2300 2100 1900 1700 1500 1300 1100 900 700 500 1-Jan 8-Jan 4-Jun 2-Apr 9-Apr 5-Feb 5-Mar 7-May 15-Jan 22-Jan 29-Jan 11-Jun 18-Jun 25-Jun 16-Apr 23-Apr 30-Apr 12-Feb 19-Feb 26-Feb 12-Mar 19-Mar 26-Mar 14-May 21-May 28-May Highest Peak Demand: 2210.4MW on 23rd March 2015 Lowest Peak Demand: 1494.6MW on 15th April 2015 Lowest Demand : 608.2MW on 14th April 2015 Note: NCRE contribution of SPP Mini Hydro, Solar and Biomass is not included for the peak demand. 4. Load Factor Load Factor is an indicator which shows how steady an electrical load over time. It is simply the average load divided by the peak load in a system over a period of time. But normally load factor is calculated subjected to the produced energy according to the following formula. 푇표푡푎푙 퐺푒푛푒푟푎푡표푛 퐷푢푟푛푔 푡ℎ푒 푁표푚푛푎푙 푃푒푟표푑 퐿표푎푑 퐹푎푐푡표푟 = 푀푎푥푚푢푚 퐷푒푚푎푛푑 x푁표 . 표푓 ℎ표푢푟푠 푛 푡ℎ푒 푟푒푝표푟푡 푝푒푟표푑 Calculated Load Factor for the total system for first half of year 2015 = 61.8% Calculated Load Factor for the total system for first half of year 2014 = 62.1% 5 | P a g e [Generation Performance in Sri Lanka] 2015 (First Half) Load factor of any system must be tried to keep in its maximum by pulling down the concentrated maximum demand and shifting the loads to periods of otherwise low usage. Load factor maximization is essential in maintaining the security of supply of the countries in which, meeting the concentrated maximum demand is critical. Countries which have a flat load curve own a higher load factor. Monthly Variation in Load Factor 66% 64% 62% 60% 58% 56% 54% 52% 50% Jan Feb Mar Apr May Jun Sri Lanka has a load curve with a steep peak in the night, where starting from about 6.00 pm the load grows to about 2,100 MW by 7.30 pm and starts falling off after about 08.30 pm. Therefore the system must be comprised a substantial additional generation capacity only to meet that abrupt sharp night peak; hence the load factor in Sri Lanka is comparatively low. As a solution for that, CEB has introduced a three tier tariff plan for the industrial electricity consumers with low off peak rates and penal peak rates to smoothen the daily peak load and push some industrial activities to low demand hours, and this time-of-day tariff scheme is expected to be facilitated for the domestic consumers as well in near future. Note: Load Factors were calculated excluding NCRE contribution of SPP Mini Hydro, Solar and Biomass component of the system 5. Plant Factor The plant factor of a power plant is the ratio of the actual energy output of the power plant over a period of time to its potential output if it had operated at full nameplate capacity the entire time. Plant Factors vary greatly depending on the type of power plants and it is calculated according to the following formula. 6 | P a g e [Generation Performance in Sri Lanka] 2015 (First Half) 퐴푐푡푢푎푙 퐸푛푒푟푔푦 푃푟표푑푢푐푡표푛 퐷푢푟푛푔 푡ℎ푒 푁표푚푛푎푙 푃푒푟표푑 푃푙푎푛푡 퐹푎푐푡표푟 = 푃표푡푒푛푡푎푙 퐸푛푒푟푔푦 푃푟표푑푢푐푡표푛 퐷푢푟푛푔 푡ℎ푒 푃푒푟표푑 Calculated plant factors for all grid connected power plants in Sri Lanka during the first half of the year 2015 are listed below. CEB Hydro Old Laxapana 68.5% New Laxapana 49.20% Wimalasurendra 30.8% Inginiyagala 62.0% Samanala 45.7% Canyon 29.8% Polpitiya 58.9% Randenigala 45.6% Upper Kotmale 27.1% Udawalawe 53.4% Ukuwela 45.5% Kotmale 19.8% Rantambe 52.6% Victoria 43.1% Bowatenna 17.7% Nilambe 49.4% Kukule 38.5% CEB & IPP Thermal Plant Factors of thermal power plants are listed below in the order of calculated unit cost for the first half of year 2015. 1 Puttalam Coal I 68.2% 9 Asia Power 19.9% 2 Puttalam Coal II 68.5% 10 Westcoast 11.2% 3 Puttalam Coal III 67.9% 11 Sapugaskanda A 6.7% 4 Colombo Power 46.9% 12 Kelanitissa PS GT 7 0.6% 5 ACE Embilipitiya 33.0% 13 Sapugaskanda B 1.2% 6 AES Kelanitissa 1.5% 14 Northern Power 1.9% 7 Kelanitissa CCY 40.3% 15 Kelanitissa Small GTs 0.1% 8 Uthura Janani 44.7% CEB Wind – 4.0% 7 | P a g e [Generation Performance in Sri Lanka] 2015 (First Half) SPP Badulu Oya MHP 75.2% Sheen MHP 39.8% Monaraela MHP 27.5% Lenadora MHP 66.6% Kotanakanda MHP 39.8% Kadurugal Dola MHP 27.4% Kirkoswald MHP 65.4% Kudawa Lunugalahena MHP 39.3% Labuwewa MHP 27.3% Loggal Oya MHP 61.3% Delta MHP 39.3% Battalagala MHP 26.9% Wee Oya MHP 58.6% Alupola MHP 39.1% Bambarabotuwa III MHP 26.4% Waverly MHP 57.9% Erathna (Waranagala) MHP 39.1% Rakwana Ganga MHP 26.1% Mulgama MHP 57.4% Bulathwaththa MHP 39.1% Kudah Oya MHP 25.4% Hapugastenna - 1 MHP 56.3% Koladeniya MHP 38.8% Adavikanda MHP 24.8% Batatota MHP 56.1% Henfold (Agra Oya) MHP 37.9% Radella MHP 23.9% Gampola Walakada MHP 37.9% Galabod MHP 23.9% Gomala Oya MHP 55.1% Manelwala MHP 54.5% Maha Oya MHP 37.0% Galatha Oya MHP 23.9% Ranmudu Oya MHP 54.4% Wembiyagoda MHP 36.7% Upper Magal Ganga MHP 23.8% Bogandana MHP 54.0% Magal Ganga MHP 36.2% Barcaple I MHP 23.3% Watakelle MHP 53.8% Guruluwana MHP 36.1% Lower Atabage
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