DOCSLIB.ORG

NIT NO Bid Document

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
NIT NO Bid Document Bid Document NIT NO :- DGM /ED- I/2015-2016/04 Dated: 16/03/2016 Name of Work :- Implementation of R-APDRP (Part-B) Scheme under Agartala Project (Town Pratapgarh Area): Design, Engineering, Manufacturing, Supply, testing ,Delivery, Erection,Testing at site & commissioning of 33/11 KV, 2X7.5 MVA,Indoor Type Power Sub-Station at NSRCC, Netaji Chowmuhani, Agartala with associated 33KV Underground Rampur Substation- NSRCC S/C Line, 33 KV Bay at Rampur including Control room and boundary wall at NSRCC. (Balance Work). Estimated Cost :- Rs. 1,55,12,109.00 Earnest Money :- Rs. 3,10,242.00 Time for Completion :- 6(Six) Month. The document contain 240(Two Hundred Forty) pages excluding cover pages The document issued to: ___________________________________ Deputy General Manager. Electrical Division No - I Agartala, West Tripura. TRIPURA STATE ELECTRICITY CORPORATION LIMITED (A GOVT. OF TRIPURA ENTERPRIZE) SECTION-I Notice Inviting Tender for :Implementation of R-APDRP(Part-B) Scheme under Agartala Project(Pratapgarh Town Area): for the work: “Implementation of R- APDRP (Part-B) Scheme under Agartala Project: Design, Engineering, Manufacturing, Supply, testing, Delivery, Erection, Testing at site & commissioning of 33/11 KV, 2X7.5 MVA, Indoor Type Power Sub-Station at NSRCC, Netaji Chowmuhani, Agartala with associated 33KV underground “Rampur Sub-Station-NSRCC S/C Line”,33KV Bay at Rampur including construction of control room building and boundary wall at NSRCC. (Balance Work) The Ministry of Power, Government of India is providing financial assistance toTSECL under Re-structured Accelerated Power Development and Reforms Programme(R-APDRP). Projects under R-APDRP shall be taken up in two parts. Part – A includes the projects for establishment of Base line Data and IT application for energy accounting /energy auditing and IT based consumer service centers. Part-B of theprogramme includes strengthening of regular distribution systems. Under this PART-B scheme of Agartala project, there is provision and sanction for installation of new 2x7.5 MVA, 33/11 KV Substation including all associated equipment & foundation at Town Pratapgarh under Agartala Project. Land for the Substation in Pratapgarh town could not be made available. However Deptt. Of Sports & Affairs agreed to provide land in its NSRCC Complex for setting up the sub-station where from Pratapgarh town area would be fed. The work involves supply, erection, testing & commissioning on Turn Key basis 33/11 KV Power Transformers of 2X7.5 MVA capacity including supply, erection, testing & commissioning of all standard equipment for Transformer protection and controls with 33KV XLPE insulated Cable line for sub-transmission connectivity. SCOPE OF WORK Scope of work covered under this package includes design, engineering,manufacture, testing, supply, transportation to site, storage, insurance, handling,Erection, testing & commissioning of 33/11 KV,2x 7.5 MVA power transformer, 33 KV indoor type vacuum circuit breaker and other equipment /devices as required including construction of Transformer foundation, foundation for other equipment and also supply, installation & commissioning of 11 KV indoor type vacuum circuit breakers, power & control cable,Structural Steel, related hardware etc. as required including 110 Volt battery bank with charger as specified inschedule of work as per engineering necessities for full completion and successful commissioning of the Sub- station under Electrical Division No-I. 1.0 Scope of work given above is only indicative. The detailed scope has been described in the Schedule of Work attached with this bidding document. ► Bid sale date & Time : 07.05.2016 up 1.30Pm. ►Bid receipt time & date : 09.05.2016 up to 2.0Pm. ►Bid opening time and date (Pre-qualification) : 10.05.2016 at 11.30am ► Bid opening time and date (Techno-commercial) : 10.05.2016 at 3.30Pm. ► Bid opening time and date (Price Bid) : 16.05.2016 at 11.30 am. ►Cost of Bid document : Rs. 5000.00 ►Estimated Cost : Rs. 15512109.00 ►Earnest Money : Rs. 310242.00 ►Completion Period : 6 (Six) Month Bidder DGM,ED-I Page-1 TRIPURA STATE ELECTRICITY CORPORATION LIMITED (A GOVT. OF TRIPURA ENTERPRIZE) 2.0 QUALIFYING REQUIREMENTS FOR BIDDERS To be qualified to bid for the package, the bidder shall have to meet the following minimum criteria: 2.1 The bidder must have designed, manufactured, type tested and supplied 33 KV or above voltage class power transformer(s), Circuit breaker(s). Instrument Transformers etc. and other equipment(s) related to construction & commissioning of 33 KV sub-station which are in successful operation for at least one year prior to last date of submission of bid as per NIT” Or 2.2 The bidder must have done complete construction & commissioning work of at least 1 (one) no. 33KV or above voltage Sub-station including supply, erection, testing and commissioning of all equipment and design & construction of Control room building on turnkey basis in a single award of work which must be in satisfactory operation for at least 1 (One) year prior to last date of submission of bid as per NIT. 2.3 The minimum average annual turnover of the bidder for the last three years shall be not less than 30% of the estimated cost put to tender. 2.4 Bids may be submitted by an individual firm (proprietorship entity) with relevant experience or registered partnership firm or companies registered under companies act or joint ventures of registered firms/companies/proprietorship entity with two constituents only as one of the following. 2.4.1 A single firm of proprietorship entity or registered partnership firms or companies registered under Companies Act, which meets anyone or both the requirements, indicated in para 2.1, 2.2 above and 2.3(Mandatory). 2.4.2 A joint venture of two registered firms/companies/ proprietorship entity, wherein each registered firm/company/ proprietorship entity shall meet any one or both the requirements of para 2.1, 2.2&2.3 above. 2.4.3 The figures of average annual turnovers for each registered firm/company/proprietorship entity shall be added together to determine the bidder’scompliance with the minimum average annual turnover requirement for the package as given at para 2.3 above. 2.5 In case of joint ventures any of the registered firms/companies/ proprietorshipentities shall be authorized to incur liabilities and receive instructions as prime bidder / lead partner for and on behalf of any and all partners of the joint venture and the entire execution of the contract including receipt of payment shall be done exclusively through him. This authorization shall be evidenced by submitting a power of attorney signed by legally authorized signatories of all the partners. 2.6 All partners of Joint Venture shall be liable jointly and individually /severally for the execution of the contract in accordance with the contract terms. A copy of the agreement of joint venture partners having such provision shall be submitted with the bid. 2.7 Notwithstanding anything contained herein above, TSECL reserves theright to assess the “capacity and capability” of the bidder to execute the work. 2.8 In addition to the mandatory requirements as specified in Para 2.1, 2.2 & 2.3(mandatory), the following criteria must need to be fulfilled for the Bidder/Lead Partner for this package. “Those parties already engaged in erstwhile Department of Power,Govt. of Tripura or its successor TSECL’s APDRP, RGGVY-Ph-I&II (under XIth & XIIth Plan) works and or any others works, their eligibility would be judged from the satisfactory performance certificates of the controlling officer of the work (not below the rank of Executive Engineer or Deputy General Manager), submission of which is mandatory. Any unsatisfactory performance report will be treated as disqualification of eligibility.” Bidder DGM,ED-I Page-2 TRIPURA STATE ELECTRICITY CORPORATION LIMITED (A GOVT. OF TRIPURA ENTERPRIZE) 2.9 The bidder shall furnish documentary evidence in support of qualifying requirement stipulated above. 2.10 The bidder’s offer must include the following documents to substantiate the qualifying requirement such as: i) Copies of original documents defining the constitution or legal status, placeof registration and principal place of business, written power of attorney of the signatory of the Bidder to commit the Bid ii) Successful completion certificate issued by an Engineer not below rank of Executive Engineer/Deputy General Manager in charge along with supporting photocopies of work order /LOA for the work executed in any 1(one) year out of last 5 financial years. Bidders shall provide details of work of similar nature executed or under execution during last 3 years in the following format. Sl. Description Client LOA Amount Scheduled Actual Brief No. of Name Value obtained completion Completion Reason work of with (in till date time time of similar LOA ` (in ` delay nature Ref. Lakhs) Lakhs) No. &Date iii) Experience in work of a similar nature and volume for each of the last three years and details of work under way of contractually committed; and clients who may be contacted for further information on those contract. iv) Major items of construction equipment proposed to carry out the contract. v) Details of proposed manufacturers of material/equipment and erection agencies are to be submitted with the bid. vi) Qualification and experience of key site management and technical personal proposed for the contract. vii) Reports on the financial standing of the bidder, such as Profit and loss account & balance sheets and Auditor’s reports etc. for the financial years 2012-13, 2013-14, 2014-15. viii) Evidence of adequacy of working capital and access to line(s) of credit and availability of other financial resources from the scheduled commercial Bank. ix) Authority to seek reference from the Bidder’s Bankers (as per format enclosed). x) Information regarding any litigation, current or during the last five years, inwhich the bidder is involved; the parties concerned, and disputed amount.
Load more

Recommended publications
  • Income? Bisone
    INCOME? BISONE ED 179 392 SP 029 296 $ AUTHOR Hamilton, Howard B. TITLE Problem Manual for Power Processiug, Tart 1. Electric Machinery Analysis. ) ,INSTITUTION Pittsbutgh Univ., VA. 51'014 AGENCY National Science Foundation, Weeshingtcni D.C. PUB DATE -70 GRANT NSF-GY-4138 NOTE 40p.; For_related documents', see SE 029 295-298 EDRS PRICE MF01/BCO2 Plus Postage. DESCRIPTORS *College Science: Curriculum Develoimeft: Electricity: Electromechanical lacshnology;- Electfonics: *Engineering Educatiob: Higher Education: Instructional Materials: *Problem Solving; Science CourAes:,'Science Curriculum: Science . Eductttion; *Science Materials: Scientific Concepts AOSTRACT This publication was developed as aPortion/ofa . two-semester se4uence commencing t either the-sixth cr seVenth.term of the undergraduate program in electrical engineering at the University of Pittsburgh. The materials of tfie two courses, produced by' National Science Foundation grant, are concernedwitli power con ion systems comprising power electronic devices, electromechanical energy converters, and,associnted logic configurations necessary to cause the systlp to behave in a, prescrib,ed fashion. The erphasis in this portion of the'two course E` sequende (Part 1)is on electric machinery analysis.. 7his publication is-the problem manual for Part 1, which provide's problems included in 4, the first course. (HM) 4 Reproductions supplied by EDPS are the best that can be made from the original document. * **************************v******************************************** 2
    [Show full text]
  • Diploma in Electrical and Electronics Engineering PAGE 1
    ` DIPLOMA IN ELECTRICAL AND ELECTRONICS ENGINEERING COURSES OFFERED CODE COURSE CREDITS YEAR/SEMESTER 15O A) FOUNDATION COURSES : (49 CREDITS) (COMMON FOR ALL PROGRAMMES) 0101 Communicative English – I 5 I/ODD 0102 Engineering Mathematics-I 8 I/ODD 0103 Engineering Physics – I 5 I/ODD 0104 Engineering Chemistry – I 5 I/ODD 0105 Engineering Physics- I Practical 1 I/ODD 0106 Engineering Chemistry – I Practical 1 I/ODD 0107 Communicative English – II 4 I/EVEN 0108 Engineering Mathematics-II 5 I/EVEN 0109 Applied Mathematics 5 I/EVEN 0110 Engineering Physics – II 4 I/EVEN 0111 Engineering Chemistry – II 4 I/EVEN 0112 Engineering Physics – II Practical 1 I/EVEN 0113 Engineering Chemistry – II Practical 1 I/EVEN B) CORE TECHNOLOGY COURSES : ( 43 CREDITS) 0201A Workshop Practical 1 I/ODD 0202 Engineering Graphics-I 3 I/ODD 0203 Engineering Graphics-II 3 I/EVEN 0204 Computer Applications Practical – I 1 I/ODD 0205 Computer Applications Practical – II 1 I/EVEN 3201 Electrical Circuit Theory 6 II/ODD 3202 Electrical Machines - I 5 II/ODD 3203 Electronic Devices and Circuits 5 II/ODD 3204 Electrical Circuits and Machines Practical 3 II/ODD 3205 Electronic Devices and Circuits Practical 3 II/ODD 3206 Electrical Workshop Practical 2 II/ODD 3207 Life and Employability Skills Practical 2 II/ODD 3208 Digital Electronics 5 II/EVEN 3209 Integrated CircuitsPractical 3 II/EVEN Diploma in Electrical and Electronics Engineering PAGE 1 ` C) APPLIED TECHNOLOGY COURSES: (58 CREDITS) 3301 Electrical Machines – II 5 II/EVEN 3302 Measurements and Instruments 4 II/EVEN
    [Show full text]
  • Serial Step up Resonant Frequency Static Discharge System - Tesla Gun
    International Journal of Pure and Applied Mathematics Volume 114 No. 7 2017, 531-546 ISSN: 1311-8080 (printed version); ISSN: 1314-3395 (on-line version) url: http://www.ijpam.eu Special Issue ijpam.eu Serial Step Up Resonant Frequency Static Discharge System - Tesla Gun R. Ramya1, Abhinash Kumar Patra2, Saurodeep Adhikary3, Rishav Ranjan Paul4 SRM University, Kattankulathur [email protected] and [email protected] Abstract Currently weapons research and development takes up the greatest share of any defense budget. In this aspect, India is lagging, mostly due to economical and institutional constraints. It is the largest importer of arms and ammunitions in the world. However, there is still a need for a failsafe defense system. This paper is a step towards addressing this shortcoming of the Indian military. However, this is not the first prototypal weapons system in the world. The U.S. Defense Strategic Defense Initiative put into development the technology of a similar type using a particle beam to be used as a weapon in outer space as part of the Beam Experiments Aboard Rocket (BEAR) project. This is the next step to build a weapon system that rises above ammunition constraint and environmental hazard. The basic premise of a Tesla Gun involves static discharge at a very high voltage. There are three main elements of the system. The first is the voltage step up. The next is the resonant circuit and the final element is the targeting system. Key Words and Phrases: Tesla Coil, Static Discharge, Resonant Frequency, Bounces. 1. Introduction 1 531 International Journal of Pure and Applied Mathematics Special Issue A Tesla coil is a device producing a high frequency current, at a very high voltage but of relatively small intensity.
    [Show full text]
  • A Comparative Study of Methods for Calculating AC Winding Losses in Permanent Magnet Machines
    A Comparative Study of Methods for Calculating AC Winding Losses in Permanent Magnet Machines Narges Taran Vandana Rallabandi Dan M. Ionel SPARK Lab, ECE Dept. SPARK Lab, ECE Dept. SPARK Lab, ECE Dept. University of Kentucky University of Kentucky University of Kentucky Lexington, KY, USA Lexington, KY, USA Lexington, KY, USA [email protected] [email protected] [email protected] Greg Heins Dean Patterson Regal Beloit Corp. Regal Beloit Corp. Research and Development Research and Development Rowville, VIC, Australia Rowville, VIC, Australia [email protected] [email protected] Abstract—In this study different methods of estimating the are discussed. The additional conductor loss caused by rotor additional ac winding loss due to eddy currents at open-circuit PMs is more significant in case of open slot machines, due are explored. A comparative study of 2D and 3D FEA, and to the increased leakage flux, and an extreme case occurs for hybrid numerical and analytical methods is performed in order to recommend feasible approaches to be employed. Axial flux air cored machines where the stator core is eliminated and all permanent magnet (AFPM) machine case studies are included, conductors are exposed to the air gap flux density. namely a machine with open slots and a coreless configuration. Several authors have analytically estimated the additional These machine topologies are expected to present a substantial amount of ac winding loss, which would therefore need to ac copper loss [1], [4]–[8]. Two–dimensional FEA is used be considered during optimal design. This study is one of in many studies [9]–[12] while 3D FEA has been employed the first ones to compare meticulous 3D FEA models with only very recently in few works [3], [13].
    [Show full text]
  • THE ULTIMATE Tesla Coil Design and CONSTRUCTION GUIDE the ULTIMATE Tesla Coil Design and CONSTRUCTION GUIDE
    THE ULTIMATE Tesla Coil Design AND CONSTRUCTION GUIDE THE ULTIMATE Tesla Coil Design AND CONSTRUCTION GUIDE Mitch Tilbury New York Chicago San Francisco Lisbon London Madrid Mexico City Milan New Delhi San Juan Seoul Singapore Sydney Toronto Copyright © 2008 by The McGraw-Hill Companies, Inc. All rights reserved. Manufactured in the United States of America. Except as permitted under the United States Copyright Act of 1976, no part of this publication may be reproduced or distributed in any form or by any means, or stored in a database or retrieval system, without the prior written permission of the publisher. 0-07-159589-9 The material in this eBook also appears in the print version of this title: 0-07-149737-4. All trademarks are trademarks of their respective owners. Rather than put a trademark symbol after every occurrence of a trademarked name, we use names in an editorial fashion only, and to the benefit of the trademark owner, with no intention of infringement of the trademark. Where such designations appear in this book, they have been printed with initial caps. McGraw-Hill eBooks are available at special quantity discounts to use as premiums and sales promotions, or for use in corporate training programs. For more information, please contact George Hoare, Special Sales, at [email protected] or (212) 904-4069. TERMS OF USE This is a copyrighted work and The McGraw-Hill Companies, Inc. (“McGraw-Hill”) and its licensors reserve all rights in and to the work. Use of this work is subject to these terms. Except as permitted under the Copyright Act of 1976 and the right to store and retrieve one copy of the work, you may not decompile, disassemble, reverse engineer, reproduce, modify, create derivative works based upon, transmit, distribute, disseminate, sell, publish or sublicense the work or any part of it without McGraw-Hill’s prior consent.
    [Show full text]
  • IEEE/PES Transformers Committee
    Transformers Committee Chair: Sue McNelly Vice Chair: Bruce Forsyth Secretary: Ed teNyenhuis Treasurer: Paul Boman Awards Chair/Past Chair: Stephen Antosz Standards Coordinator: Jim Graham IEEE/PES Transformers Committee Spring 2019 Meeting Minutes Anaheim, CA March 24 – 28, 2019 Unapproved (These minutes are on the agenda to be approved at the next meeting in Fall 2019) TABLE OF CONTENTS GENERAL ADMINISTRATIVE ITEMS 1.0 Agenda 2.0 Attendance OPENING SESSION – MONDAY MARCH 25, 2019 3.0 Approval of Agenda and Previous Minutes – Susan McNelly 4.0 Chair’s Remarks & Report – Susan McNelly 5.0 Vice Chair’s Report – Bruce Forsyth 6.0 Secretary’s Report – Ed teNyenhuis 7.0 Treasurer’s Report – Paul Boman 8.0 Awards Report – Stephen Antosz 9.0 Administrative SC Meeting Report – Susan McNelly 10.0 Standards Report – Jim Graham 11.0 Liaison Reports 11.1. CIGRE – Craig Swinderman 11.2. IEC TC14 – Phil Hopkinson 11.3. Standards Coordinating Committee, SCC No. 18 (NFPA/NEC) – David Brender 11.4. Standards Coordinating Committee, SCC No. 4 (Electrical Insulation) – Evanne Wang 11.5. ASTM D27 – Tom Prevost 12.0 Approval of Transformer Committee P&P Manual - Bruce Forsyth 13.0 Hot Topics for the Upcoming – Subcommittee Chairs 14.0 Opening Session Adjournment CLOSING SESSION – THURSDAY MARCH 28, 2019 15.0 Chair’s Remarks and Announcements – Susan McNelly 16.0 Meetings Planning SC Minutes & Report – Tammy Behrens 17.0 Reports from Technical Subcommittees (decisions made during the week) 18.0 Report from Standards Subcommittee (issues from the week) 19.0
    [Show full text]
  • SP0504 Power Transformer Testing
    POWER TRANSFORMER TESTING SWP • Hold current licences for any vehicles and equipment they 1. PURPOSE AND SCOPE may be required to operate. The purpose of this Standard Work Practice (SWP) is to Required Training standardise and prescribe the method for testing power transformers. Staff must be current in all Statutory Training relevant for the task. Testing of current transformers, voltage transformers or auxiliary transformers internal to the power transformer are not included in All workers must have completed Field Induction or have this SWP. recognition of prior Ergon Energy Field Experience. Contractors must have completed Ergon Energy's Generic 2. STAFFING RESOURCES Contractor Worker Induction. Adequate staffing resources with the competencies to safely complete the required tasks as per MN000301R165: 8 Level Field 3. DOCUMENTATION Test Competency CS000501F115 . Daily/Task Risk Management Plan These competencies can be gained from, but not limited to any or ES000901R102 . Health and Safety Risk Control Guide all of the following:- SP0504R01. Power Transformer Testing Job Safety Analysis • Qualifying as an Electrical Fitter Mechanic. SP0504C01R01. Power Transformer IR and DDF Temperature • Qualifying as a Technical Service Person. Correction • Training in the safe use of relevant test equipment. SP0504C04. Power Transformer No Load Loss Test Report Requirement for all live work: SP0504C05. Power Transformer Load Loss Test Report • Safety Observer (required for all “live work” as defined in SP0504C06. Power Transformer Load Loss and Impedance the ESO Code of Practice for Electrical Work). Calculation All resources are required to: SP0504C08. Power Transformer Testing Competency Assessment • Have appropriate Switching and Access authorisations for the roles they are required to perform and have the ability SP0504C13.
    [Show full text]
  • Modelling of Iron Losses of Permanent Magnet Synchronous Motors
    MODELLING OF IRON LOSSES OF PERMANENT MAGNET SYNCHRONOUS MOTORS Chunting Mi A thesis submitted in confollILity with the requirements for the Degree of Doctor of Philosophy in the Department of EIectncal and Computer Engineering University of Toronto O Copyright by Chunting Mi, 200 1 The author has pteda non- L'auteur a accordé une Licence non exclusive licence dowing the exclusive permettant à la National Li* of Canada to Bibliothèque nationde du Canada de reproduce, Ioan, distnbute or sell reproduire, prêter, distriilmer ou copies of this thesis in microform, vendre des copies de cette thèse sous paper or eIectronic formats. la forme de microfiche/film, de reproduction sur papier ou sur format electronique. The author retains ownership of the L'auteur conserve la propriété du copyright in this thesis. Neither the droit d'auteur qai protège cette thèse. thesis nor substantial extracts fiom it Ni la thèse ni des extraits substantiels may be printed or otherwise de celle-ci ne doivent être imprimés reprodnced without the author's ou autrement reproduits sans son pdssi01l. autorisation. MODELLING OF IRûN LOSSES OF PERMANENT MAGNET SYNCHRONOUS MOTORS Chunting Mi A thesis submitted in conformity with the requUements for the De- of Doctor of Philosophy in the Department of Electrical and Computer Engineering University of Toronto @ Copyright by Chunting Mi, 200 1 ABSTRACT This thesis proposes a refïned approach to evaluate iron losses of surface-mounted permanent magnet (PM) synchronous motors. PM synchronous moton have higher efficiency than induction machines with the same &me and same power ratnigs. However, in PM synchronous motors, iron Iosses form a larger portion of the total losses than in induction machines.
    [Show full text]
  • RESISTANCE of COIL 1 Temperature Effects
    Chapter 6—Resistance of Coil 6–1 RESISTANCE OF COIL The resistance RTC in the RLC model is an effective or equivalent resistance which rep- resents all the losses in the Tesla coil. It includes 1. Ohmic or copper losses 2. Dielectric losses, coil form and conductor insulation 3. Eddy current losses in toroid, strike ring, and soil 4. Radiation losses 5. Losses in the spark It is surprising how difficult it is to calculate these various losses. Making meaningful measurements can also be challenging. If we operate at low input voltage so we are below spark breakout, then we can ignore the last term for the moment. I will ramble through some considerations for the other losses. 1 Temperature Effects Almost all coils are wound with copper wire. It is moderately priced and widely available. There might be an occasional aluminum coil, usually from some ‘bargain’ at a surplus auction. Aluminum has higher resistivity than copper, so to get a given resistance the wire must be physically larger. We saw earlier that to get a high toroid voltage we needed a coil with large L and/or small R. If we use larger wire to keep the resistance the same, the coil must be physically larger and the inductance will decrease. We would expect therefore that aluminum coils would always be inferior to copper coils. Example You are given a choice between two spools of magnet wire, each 1000 feet in length. The copper is 24 gauge, with nominal resistance 25.67 Ω, while the aluminum is 22 gauge, with nominal resistance 26.46 Ω.
    [Show full text]
  • The Remote Calibration of Instrument Transformers
    The remote calibration of instrument transformers S. Rens orcid.org/0000-0001-8428-3893 Dissertation submitted in fulfilment of the requirements for the degree Master of Engineering in Electrical and Electronic Engineering at the North-West University Supervisor: Prof. A.P.J. Rens Co-supervisor: Prof. J.E.W. Holm Graduation ceremony: May 2019 Student number: 23509333 ABSTRACT Successful operation and control of a power system is dependent on the accurate measurement of field data. Each measurement received is the result of a chain of instrumentation and data handling processes, and with each process a certain amount of uncertainty is introduced in the measurement result. Instrument transformers, additional transducers, analog-to-digital (A/D) converters, scaling and conversion procedures, synchrophasor recorders and communication equipment all contribute to the uncertainty in measurement. Errors in this measurement chain can either be systematic, random or installation errors. Instrumentation transformers convert (and isolate) primary power system current and voltage waveforms into standardised instrumentation circuit values (i.e. 110 V and 5 A) for more convenient measurement purposes. Nominal conversion ratios, specified on nameplates, may differ from the actual conversion ratios due to manufacturing, drift over time and environmental conditions. To eliminate biased measurements received from instrument transformers, calibration of instrument transformers should be performed periodically. Traditionally this has been done by means field work creating an out-of-service condition. It is time-consuming, expensive and labour intensive. An opportunity exists due to the increased availability of synchronous data for the idea of remote calibration of instrument transformers. This idea estimates a ratio correction factor (RCF) for the instrument transformers using synchrophasor data over a transmission line.
    [Show full text]
  • Matched Transformers for Synchro and Resolver Applications
    Electrocomponent Science and Technology (C) Gordon and Breach Science Publishers Ltd. 1975, Vol. 2, pp. 121-134 Printed in Great Britain MATCHED TRANSFORMERS FOR SYNCHRO AND RESOLVER APPLICATIONS M. PRATT Professional Components Division, Ferranti Ltd., Dundee, UK (Received December 17; 1974; in final form March 3, 1975) Transformer pairs in Scott Tee and similar transformer arrangements have been used for some considerable time in precision synchro/resolver angular measuring gear and in synchro to digital converters. Literature on the subject of transformer requirements is, however, scant or non-existent.I, 2 This paper describes the basic principle of transformer operation and develops a design approach which, although aimed primarily at the minimisation of transformer hardware size, still maintains the required level of angular accuracy. The method applies to transformers utilised in mobile systems, particularly transformer arrangements working under loaded conditions. INTRODUCTION manufacturing approach leading to minimised weight and volume, especially in transformers looking Synchro shaft angle to digital conversion techniques towards and positioning the synchro. (Digital to are used extensively in airborne and shipborne synchro mode application.) systems to give direct read-out positional data on synchro and resolver elements with an ability to 2 THREE TO FOUR WIRE CONVERSION reposition synchro devices from a central control computer. The use of transformers in three to four wire Shaft angle data, to and from the control point, is conversion is readily understood by first considering by a three wire system, usually with the synchro Figure 1. which is descriptive of a synchro element elements energised at a frequency of 400 Hz.
    [Show full text]
  • Explore New Paths with the CT Analyzer – Extended Testing Benefits for Your Applications
    Presentation – 4.1 Explore new paths with the CT Analyzer – Extended testing benefits for your applications Florian Predl, OMICRON, Austria Ie excitation current IS secondary current 1. Introduction IP primary current Xm main inductivity of the core This paper describes on the one hand side the principal Rm magnetic losses of the core test procedure of the CT Analyzer and points out the NP,NS amount of turns of the ideal core advantages of this test method in regards to a RCT ohmic resistance of secondary turns conventional high current injection measurement EMF Electro-Motive Force – secondary core voltage method. On the other hand side it elucidates special US secondary terminal voltage current transformer testing applications and reveals RB ohmic part of complex burden attempts at solutions. Furthermore, the CT Analyzer PC XB inductive part of complex burden Tools are introduced and their advantages and φB phase angle of burden possibilities for the individual user are presented. Figure 2 shows the vector diagram of current and voltages for a linear main inductivity. 2. Principal Test Procedure of the CT Analyzer The CT Analyzer measures the losses of a current transformer according to the equivalent circuit diagram of the current transformer, in terms of the copper losses and the iron losses. The copper losses are described as the winding resistance RCT of the current transformer. The iron losses are described as the eddy losses as eddy resistance Reddy and the hysteresis losses as hysteresis resistance RH of the core. With this knowledge about the total losses of the core, the CT Analyzer is able to calculate the current ratio error and the phase displacement for any primary current and for any secondary burden.
    [Show full text]