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JournalINDIA

Vol. 6, No. 1 - January 2017 (Half Yearly Journal)

ciINDIA

ISSN : 2250-0081 (Print)ISSN : 2250-009X (Online)

Inaugural Session of 46 CIGRE Session, the Bi-annual Technical Conclave held in Paris from 21st to 26 August 2016

CIGRE IndIa JouRnalVolume 6, No. 1 January 2017

Disclaimer : The statements and opinions expressed in this journal are that of the individual authors only and not necessarily those of CIGRE - India.

Editorial Advisory Board

• I.S.Jha,CMD,POWERGRID&President,CIGREIndia• R.P.Sasmal,Director,POWERGRID&ChairmanTech,

CIGREIndia• N.N.Misra,FormerDirector(Opn.),NTPC&Vice-Chairman

(Tech.)CIGREIndia• AmitabhMathur,Director,BHEL&VicePresident,CIGRE

India• K.K.Sharma,Director,NTPC,&VicePresident,CIGRE

India• MataPrasad,FounderPresidentCIGREIndia• Prof.S.C.Srivastava,Deptt.ofElect.Engg.IIT,Kanpur• PhilippeAdam,SecretaryGeneral,CIGREHQ,Paris• Dr.MohinderS.Sachdev,University ofSaskatchewan,

Canada

CONTENTSPage No

Editor’s Note 2Articles• TransmissionandDistributionIntegratedAnalysisandEvaluationSystemforDistributedGeneration –J. Suh, S.Yoon and G. Jang 3

• IntegratedRoleofDielectricFluidsinPowerTransformersandShuntReactors–K. Baburao, Nalin Nanavati and P.N. Narayanan 9

• OperationalExperiencein1200kVNationalTestStation(UHVAC),India–I.S. Jha, B.N. De. Bhowmick, S.B.R. Rao, Dhyeya. R. Shah, Rachit Srivastava, R.K. Singh, S.V. Kulkarni and Santosh Kumar 15

• EnsuringHighQualityInsulationSystemofLargeMotors–Design&TestingRequirements–A.K. Gupta, D.K. Chaturvedi and P.K. Basu 26

Activity of the Society 47

• CIGREIndiaSession2016–NationalConferenceonGlobalTrendsandInnovationsinDevelopment ofPowerSector,28-29July2016,NewDelhi 32

• CIGRESession2016,21st–26thAugust2016,atParis–AReportbyCIGREIndia 42Brief About CIGRE India 49

CIGRE Members from India in 2016 51

List of Papers Accepted from India for CIGRE session 2016 at Paris from 21-26 August 2016 58

Technical Data 62

News 64

• Dr.KonstantinO.Papailiou,CEO,PFISTERERHoldingAGandChairmanofCIGRESCB2onOverheadLines

• IvanDeMesmaeker,Swedan,FormerChairmanCIGRESCB5onProtection&Automation

Editors• V.K. Kanjlia, Secretary & Treasurer, CIGRE India &

Secretary,CBIP• P.P.Wahi,DirectorInchargeCIGREIndia&CBIPAssociate Editor• VishanDutt,ChiefManager,CIGREIndia&CBIP

All communications to be addressed to:TheSecretary&TreasurerCIGREIndiaCBIPBuilding,MalchaMargChanakyapuri,NewDelhi-110021

Subscription Information 2017/ (2issues)Institutionalsubscription(Print&Online) : Rs.900/US$75Institutionalsubscription(Onlineonly) : Rs.600/US$50Institutionalsubscription(Printonly) : Rs.600/US$50Subscriptionfor10Years(PrintOnly) : Rs.5,000Subscriptionfor10Years(Online) : Rs.5,000Subscriptionfor10Years(Print&Online) : Rs.8,000

Volume 6 v No. 1 v January 2017

V.K. KanjliaSecretary&Treasurer

CIGREIndia

2

EdItoR’s notECIGREtheInternationalCouncilonLargeElectricSystemsfoundedin1921,isleadingworldwideOrganization onElectric PowerSystems, covering technical, economic, environmental,organisationalandregulatoryaspects.Itdealswithallthemainthemesofelectricity.CIGREistheuniqueworldwideorganizationofitskind-14,000equivalentmembersinaround90countries.CIGREisfocusedonpracticaltechnicalapplications.ThemainaimofCIGREistofacilitateanddeveloptheexchangeofengineeringknowledgeandinformation,betweenengineeringpersonnelandtechnicalspecialists inallcountriesasregardsgenerationandhighvoltagetransmissionofelectricity.CIGREachievesitsobjectivethroughthe16Study

Committees,eachconsistingofabout24membersfromdifferentcountries.ItisamatterofprideforIndiathatwearerepresentinginallthe16StudyCommitteeofCIGRE.

BesidesNationalCommitteesinabout60CountriesCIGREhasalsoconstituteditsregionalchapters in theworld. The chapter created forAsia is namedasCIGRE-AORC (AsiaOceansRegionalCouncil).CIGRE-AORCisaforumforsharingexperienceandknowledgeregardingpertinenttechnicalissuesparticularlythoseaffectingpowersystemsintheAsia-

OceanaRegion.ThecountriesfromAsiaOceanaRegion,whoareassociatedwiththeforumareAustralia,China,Cambodia,GulfCooperativeCouncil,HongKong,India,Indonesia,Iran,Jordan,Japan,Korea,Malaysia,NewZealand,TaiwanandThailand.

ItisamatterofgreathonorforIndiathatCIGREAORChasapprovedthenameofIndiafortheChairmanshipofCIGREAORCfornexttwoyearsfrom2016-18.Dr.SubirSen,ED,POWERGRIDhastakenoverasChairmanandShriP.P.Wahi,asSecretaryofCIGREAORCfortwoyearduringthelastmeetingofCIGREAORCheldatParison24thAugust2016.

CIGRE(India)wassetupassocietyintheyear1991withCentralBoardofIrrigation&Power(CBI&P),MalchaMarg,Chanakyapuri,NewDelhiasitssecretariat.ItfunctionsastheNationalCommittee,i.e.,CIGRE(India)forCIGREHQ(Paris).TheCIGRE(India)coordinatesinterestofIndianmembers;organisesNationalStudyCommittee(NSC)meetings.ItrecommendsappropriatepersonsforCIGREStudyCommittees.TheNationalrepresentativesareinstrumentalinprovidingfeedbacktoCIGREStudyCommitteesatParis.

Theaimsandobjectivesforwhichthecommittee,i.e.,CIGRE(India),isconstituted,istoimplementandpromoteobjectivesoftheInternationalCouncilonLargeElectricSystems(CIGRE)andaccelerateitsactivities,whichincludethe interchangeof technicalknowledgeand informationbetweenall countries in thegeneralfieldsofelectricitygenerationtransmissionathighvoltageanddistributionetc.

All-outeffortsarebeingmadetoincreasetheCIGREmembershipandactivitiesinIndia.FiveInternationalConferenceswithparticipationofabout300ineachoftheconferencewereorganizedbyCIGREIndiaintheyear2015-16andthemembershiphasalsobeenincreasedfrom250in2015to611intheyear2016.TherewasexcellentparticipationfromIndiainCIGREsession2016atParis.Total18paperswerepresentedandmorethan100officersfromIndiaincludingCEOs&Sr.OfficersfromvariousPSUs,StateElectricityCorporationandvariousRegulatorycommissionsparticipatedinCIGREsession2016.ThisissuecoversthereportontheparticipationofIndiainCIGREsession2016atParisbesidesinformativeandusefultechnicalarticlesandstatisticaldataonthesubject.

WearebringoutthisJournalonhalfyearlybasis.ThelastissuewaspublishedinthemonthofJuly2016.IamthankfultotheGoverningCouncilandtheTechnicalCommitteeofCIGREIndiafortheirvaluabletimeandguidance,butforwhich,itwouldnothavebeenpossibletoachievetheabovesignificantprogress,appreciatedbyCIGREHQParis.

IamalsothankfultoalltheseniorexpertsfromIndiaandabroadandalsotooneandallwhohavesupportedinthepasttorealizethegoalsetforthforCIGREIndiaandexpectthesimilarsupportinfuturetoo.

V.K. Kanjlia

Secretary & Treasurer CIGRE India


tRansmIssIon and dIstRIbutIon IntEGRatEd analysIs and EvaluatIon systEm foR

dIstRIbutEd GEnERatIon

J. Suh, S.Yoon and G. JangKorea University, Korea

ABSTRACT

As the amount of distributed generation supplied to distribution systems has expanded, neighbouring distribution systems or even transmission systems have been more affected according to penetration of distributed generation. However, until now, power system analysis has been conducted separately for the transmission system and distribution system. This way of analysis has had no problem in the existing power systems. However, with the rising DG connection in the distribution system, the need to reflect mutual interaction has elevated and the separated method became unable to do it properly. Transmission and distribution integrated analysis aims to enabling mutual interaction analysis. In this paper, a new methodology to evaluate the effect of distributed generation in the integrated transmission and distribution systems using on-line data. And by simulating mutual interaction, which could not be observed in previous system, case study results shows the need for transmission and distribution integrated systems with distributed generation.

Keywords : DG, Distribution. PSS/E, SCADA, SOMAS, DAS, Transmission

1. INTRODuCTIONRecentlyasdistributedgeneration(DG)hasincreased,the distributed power generation has increasinglyaffected power systems. Large-scale DGs indistributionsystemcanaffecttransmissionandotheradjacentdistributionsystem.Howeverthemonitoring,analysis and evaluation associated with DG havebeenperformedseparatelyuntilnow.Inthisseparatemethod,DGcouldbeconnectedandoperatedtolocalpowersystemwithoutconsideringitseffectonotherdistribution feeder and transmission system. Thispaper presents a newmethodology to evaluate theeffect ofDGand recommend the optimal operationofDGintheintegratedtransmissionanddistributionsystems. Inorder toanalyzetheeffectofDGin theon-line environment, transmission and distributionintegrated system is connected to distributionautomationsystem(DAS)andsupervisorycontrolanddata acquisition (SCADA).When Transmission anddistributionintegratedsystemanalyzeDGconnectedpower system, both SCADA andDAS system dateis integrated automatically. Case study, which isperformed by using the real-time data of Jeonnamregion,showseffectivenessofintegratedmethod.

2. T R A N S M I S S I O N A N D D I S T R I B u T I O N INTEGRATED SySTEM

In Korea power system, transmission system is

monitored in real-time by SCADA system. AndSubstationOperating resultsManagement System(SOMAS)recordsandprovidesthereal-timedata(Maintransformer, transmission line, breaker, etc.) of theKoreaElectricPowerCorporation(KEPCO)systemfromSCADAevery30seconds.DASmonitorsandprovidesthe operating conditions of the distribution system inreal-time[1-2]. Feeder remote terminal units,which areinstalled indistributionsystem,send thestatedataofequipmenttothemainserverviacommunicationdevice.Transmissionanddistributionsystemhadbeenanalyzedand operated separately in Korean power system.However,asinstalledDGhasincreased,thenecessityof transmissionanddistribution integratedanalysis isoccurred[3-5]. Transmission and distribution integratedsystem acquiresmonitoring data fromSOMAS andDAStoprocesstransmissionanddistributionintegratedmonitoringandanalysis.Fig.1showsthearchitectureoftransmissionanddistributionintegratedmonitoringandanalysissystem.

There are two types of transmission and distributionintegratedsystemsuchasnetworkversionandstand-alone version. In stand-alone version, operator hasto install the transmission and distribution integratedanalysisprogramtostand-alonecomputerformonitoringandanalysis.AndthisversionusesthepowersystemdatafilewhichisextractedfromDASandSOMAS.Innetworkversion,integratedseveracquireandstorepower

4 CIGRE India Journal


system.Inconventionalsystem,operatorevaluatetheeffect ofDGmanually before it connected[6]. And theoperatoronlyconsidertheeffectofDGondistributionlinewhichconnected toDGand they ignoreeffectofDG on transmission and other distribution system.However, in real operation,DGaffects power qualityofotherdistributionortransmissionsystem.AstheDGpenetrationincrease,thoseeffectbecomeaconsiderableprobleminKoreanpowersystem.Whensystemoperatorreceiverequest thepermissionofnewDGinstallationfromelectricitysuppliers,transmissionanddistributionintegratedmonitoring and analysis systemevaluatedtheimpactofnewDGconnectionandgivesawarningtooperatorwhenviolationofregulationispredicted.Inthispreliminaryevaluationtransmissionanddistributionintegrated analysismakesmore accurate evaluationpossible by covering the entire power system andpreviouslyinstalledDG.AndpreventtheDGinstallationwhich causes problem. This automated preliminaryevaluation process considers voltage fluctuation,short-circuitcapacity,possibilityofviolationofvoltageregulation,andcapacityregulation.

C. Determination of Area of VulnerabilityVoltagesagisoneofthemostsignificantproblemforpowersystem.Anditcancausingdamagetosensitiveequipment in power system[7]. Transmission anddistributionintegratedmonitoringandanalysissystemcandeterminetheareaofvulnerabilityforvoltagesaginentirepowersystem.Inseparatedanalysis,distributionsystemfaultcouldnotbeconsideredforareaofvulnerabilityintransmissionsystem.Howeverthosefaults,especiallyinhighDGconnectedsystem,cancause thevoltage

systemdatafromSOMASandDASautomatically.AndeveryPC,whichisconnectedinKEPCOnetwork,canruntransmissionanddistributionintegratedmonitoringandanalysisfunctionwithoutinstallationofsoftware.Byusingthisnetworkversion,systemoperatorsinregionalheadquarters can use transmission and distributionintegratedmonitoringandanalysissystemeasily.

A. Power System AnalysisTransmission and distribution integratedmonitoringandanalysissystemusesPSS/Eengineforpowerflowand fault current calculation. The system comparesautomaticallywithKoreanpowersystemregulationandgivesaviolationwarning touser.Followinganalyses,whicharehardtobeperformedwith theconventionalsystemwhich analyzes transmission and distributionseparately, can be possible in the transmission anddistributionintegratedsystem.

• Automated pre l iminary evaluat ion of DGconnection

• DGconnectionimpactonneighbouringdistributionsystemortransmissionsystem

• TransmissionsystemfaultcurrentcontributionofDGindistributionsystem

• Phase angle information for distribution systemnormallyopenswitchmovement

B. Preliminary Evaluation of DG ConnectionMainpurposeoftransmissionanddistributionintegratedmonitoring and analysis system is to analyze DGconnection impact. Before DG connection, Systemoperator have to consider theeffect ofDGonpower

Fig. 1:Systemdiagramoftransmissionanddistributionintegratedsystem

1

1. Introduction

Recently as distributed generation (DG) has increased, the distributed power

generation has increasingly affected power systems. Large-scale DGs in distribution system can affect transmission and other adjacent distribution system. However the monitoring, analysis and evaluation associated with DG have been performed separately until now. In this separate method, DG could be connected and operated to local power system without considering its effect on other distribution feeder and transmission system. This paper presents a new methodology to evaluate the effect of DG and recommend the optimal operation of DG in the integrated transmission and distribution systems. In order to analyze the effect of DG in the on-line environment, transmission and distribution integrated system is connected to distribution automation system (DAS) and supervisory control and data acquisition (SCADA). When Transmission and distribution integrated system analyze DG connected power system, both SCADA and DAS system date is integrated automatically. Case study, which is performed by using the real-time data of Jeonnam region, shows effectiveness of integrated method. 2. transmission and distribution integrated system

In Korea power system, transmission system is monitored in real-time by SCADA system. And Substation Operating results Management System (SOMAS) records and provides the real-time data (Main transformer, transmission line, breaker, etc.) of the Korea Electric Power Corporation (KEPCO) system from SCADA every 30 seconds. DAS monitors and provides the operating conditions of the distribution system in real-time [1-2]. Feeder remote terminal units, which are installed in distribution system, send the state data of equipment to the main server via communication device. Transmission and distribution system had been analyzed and operated separately in Korean power system. However, as installed DG has increased, the necessity of transmission and distribution integrated analysis is occurred [3-5]. Transmission and distribution integrated system acquires monitoring data from SOMAS and DAS to process transmission and distribution integrated monitoring and analysis. Fig. 1 shows the architecture of transmission and distribution integrated monitoring and analysis system.

Fig. 1. System diagram of transmission and distribution integrated system

5


Transmission and Distribution Integrated Analysis and Evaluation System for Distributed Generation

sagintransmissionsystemorotherdistributionsystem.Transmissionanddistributionintegratedmonitoringandanalysissystemusesfastmethodtodetermineanareaofvulnerability[8]andintegratedanalysisresults.Byusingintegratedanalysisforareaofvulnerabilitydetermination,unlikeconventionalsystem,areaofvulnerabilityinentirepowersystemcanbedetermined.

D. ApplicationTransmission and distribution integratedmonitoringand analysis system is used for distribution systemoptimization platform. Following applications, whicharebasedon transmissionanddistribution integratedanalysisresult,areincludedinthesystem.

• OptimalplacementofESS/FACTS

• OLTCControl

• Distributionsystemreconfiguration

Moreapplicationswillbedevelopedandappliedtothetransmissionanddistributionintegratedmonitoringandanalysissystembyfurtherstudy.

3. CASE STuDIES For thecasestudies, realdistributionnetworkdataofJeollanam-doprovinceandwholetransmissionnetworkdateoftheKEPCOsystemsareused.Thereareabout70substationsinJeollanam-doprovince.Sevenmajorsubstationsbecametargetsforcasestudysimulation.Faultcurrent,powerflow,voltagefluctuation,preliminaryevaluation ofDGare simulated.Simulations focused

on the problemswhich had not been seen throughpreviousmethodologies.Thepowerflowsimulationwasperformedinordertocomparethedifferencebetweenconventionalmethod and integratedmethod. In theanalysisforonlyonedistributionsystem,theeffectofDGinotherdistributionsystemcouldn’treflecttothepowerflow.Thismakesdifferenceoftwoanalyses.TheresultsforthefaultcurrentandvoltagefluctuationshowthattheeffectofDGswasconsideredtootherdistributionsystemandtransmissionsystem.

Simulation focused theproblemswhichhadnotbeenseen throughpreviousmethodologies todemonstratethe need for transmission and distribution integratedmonitoringandanalysissystemwhereDGinputrose.

3.1 Comparison of Power Flow Analysis ResultThesimulationwasperformedwithsametransmissionsystemdata inorder tosee thedifferencebetweenconventional method and integrated method. Inconventional transmissionmonitoring and analysissystem, effect ofDG in distribution system couldn’treflectedtotransmissionanalysisresult.Thismakesdifferenceoftwoanalysisresult.Andinconventionaldistribution analysis, substation which connectbetweendistributionsystemandtransmissionsystemisassumedasslackbus.Usuallyslackbus’svoltageisassumedas1<0°whichneglecteffectoftransmissionsystemorotherdistributionsystem.Especiallyvoltageangle difference is huge because voltage angle isrelativevalue.

Table 1 :Comparisonbetweenconventionaltransmissionanalysisandintegratedmethod

Substation Transmission and distribution integrated analysis

Conventional transmission analysis

Magnitude (P.u) Angle Magnitude (P.u) Angle

Hwasun 1.0293 -16.39 1.03 -16.54

SouthGwangju 1.0279 -17.58 1.029 -17.78

Songjung 1.0211 -15.97 1.0315 -17.13

Naju 1.0262 -16.81 1.0291 -17.2

Maewol 1.0216 -17.51 1.0223 -17.66

Hwajeong 1.0205 -17.93 1.0213 -18.09

Nogseong 1.0201 -18.03 1.0209 -18.19



3.2 DG impact on Neighboring Distribution System and Transmission System

The Korea Electric Power Corporation (KEPCO)conducted influenceassessmentonlyoneach feederwhen determiningDG connection.However, if largescaledistributedgenerationisconnectedindistributionsystem, other neighbouring distribution systems ortransmission systemswould have a higher risk of avoltageproblem.Previously,asthedistributionsystemwasanalyzed separately, such a problemhadneverbeenconsidered.Inthiscasestudy,theoccurrenceofavoltageprobleminneighbouringdistributionsystemsortransmissionsystemsaccordingtodistributionsystemDGconnectionissimulated.Fig.2andFig.3showthevoltageprofileofHwasunandSouthGwangjudistributionsystemregardingDGonWhasundistributionsystem.ThesimulationresultshowsthatifDGwassuppliedtothefeedersbelowHwasunsubstation,thenthefeedersbelowHwasunsubstationdidnothaveavoltageproblembutthefeedersbelowSouthGwangjusubstationcouldhaveavoltageproblemduetoDGonHwasundistributionsystem. Such a possibility has not been noticed inpreviousanalysis,demonstratingtheneedfordistributionand transmission integratedmonitoring and analysissystemforDGsupplyconsideration.

Fig. 3:VoltageprofileofSouthGwangjudistributionsystem

3.3 Phase Angle Difference at Both Ends of Normally Open Switch

Currently,KEPCO’sdistributionsystemisstructuredinconnectionwithotherfeederinthesamesubstationsorothersubstationsviathenormallyopenswitchesontheendofthedistributionline.Bycontrollingsuchaswitch,distribution systems canbemoreefficiently operatedorsupplypowerduringsystemfailureormaintenance.Butinclosingthenormallyopenswitches,thedifferenceofphaseanglesonbothoverhead transferbusesareimportant.Ifthephaseangledifferencebecomeslargerthana certain level, the switchesbecome impossibletoconnect.Throughconventionaldistributionanalysismethod, which is performed by each substationindividually,itispossibletofigureoutbothphaseanglesabovetheswitchesinsamesubstationbutimpossibletomeasurebothphaseanglesabovetheswitchesbetweendifferent substations. In transmission and distributionintegrated analysis, such switch phase angles canbemeasuredandphaseangle changesaccording todifferentDGsupplycanalsobeidentified.CasestudyisperformedbyusingtherealdataofdistributionsystemsbelowSouthGwangjuandHwajeongsubstation.Table3showsinformationofthedistributionandnormallyopenswitch.Baekundistribution feeder is belong toSouthGwangjuandDaemyungdistributionfeederisbelongtoHwajeongsubstation.Andthosetwodistributionfeederisconnectedwithnormallyopenswitchtosupplyelectricpowerinabnormalcondition.

Table 2 :Comparisonbetweenconventionaldistributionanalysisandintegratedmethod

Automatic switch number in distribution system

Transmission and distribution integrated analysis

Conventional distribution analysis

Magnitude (P.u) Angle Magnitude (P.u) Angle160028 1.025 -19.27 0.997 -0.77160029 1.025 -19.28 0.997 -0.78160030 1.024 -19.28 0.996 -0.78160031 1.023 -19.29 0.995 -0.79160032 1.021 -19.3 0.993 -0.8

5

fig. 2 Voltage profile of Hwasun distribution system

fig. 3 Voltage profile of South Gwangju distribution system

4.3 Phase angle difference at both ends of normally open switch Currently, KEPCO’s distribution system is structured in connection with other feeder in the

same substations or other substations via the normally open switches on the end of the distribution line. By controlling such a switch, distribution systems can be more efficiently operated or supply power during system failure or maintenance. But in closing the normally open switches, the difference of phase angles on both overhead transfer buses are important. If the phase angle difference becomes larger than a certain level, the switches become impossible to connect. Through conventional distribution analysis method, which is performed by each substation individually, it is possible to figure out both phase angles above the switches in same substation but impossible to measure both phase angles above the switches between different substations. In transmission and distribution integrated analysis, such switch phase angles can be measured and phase angle changes according to different DG supply can also be identified. Case study is performed by using the real data of distribution systems below South Gwangju and Hwajeong substation. Table 3 shows information of the distribution and normally open switch. Baekun distribution feeder is belong to South Gwangju and Daemyung distribution feeder is belong to Hwajeong substation. And those two distribution feeder is connected with normally open switch to supply electric power in abnormal condition.

table 3 Information of switch between two substations

Substaion 1 Bank No. Feeder name Substaion 2 Bank No. Feeder name South Gwangju 3 Baekun Hwajeong 1 Daemyung

Table 4 shows the voltages and phase angles of both switch sides when DG output and location is changed. Before DG connected, there is only slight difference exist between both

5

fig. 2 Voltage profile of Hwasun distribution system

fig. 3 Voltage profile of South Gwangju distribution system

4.3 Phase angle difference at both ends of normally open switch Currently, KEPCO’s distribution system is structured in connection with other feeder in the

same substations or other substations via the normally open switches on the end of the distribution line. By controlling such a switch, distribution systems can be more efficiently operated or supply power during system failure or maintenance. But in closing the normally open switches, the difference of phase angles on both overhead transfer buses are important. If the phase angle difference becomes larger than a certain level, the switches become impossible to connect. Through conventional distribution analysis method, which is performed by each substation individually, it is possible to figure out both phase angles above the switches in same substation but impossible to measure both phase angles above the switches between different substations. In transmission and distribution integrated analysis, such switch phase angles can be measured and phase angle changes according to different DG supply can also be identified. Case study is performed by using the real data of distribution systems below South Gwangju and Hwajeong substation. Table 3 shows information of the distribution and normally open switch. Baekun distribution feeder is belong to South Gwangju and Daemyung distribution feeder is belong to Hwajeong substation. And those two distribution feeder is connected with normally open switch to supply electric power in abnormal condition.

table 3 Information of switch between two substations

Substaion 1 Bank No. Feeder name Substaion 2 Bank No. Feeder name South Gwangju 3 Baekun Hwajeong 1 Daemyung

Table 4 shows the voltages and phase angles of both switch sides when DG output and location is changed. Before DG connected, there is only slight difference exist between both

Fig. 2 :VoltageprofileofHwasundistributionsystem

7


Transmission and Distribution Integrated Analysis and Evaluation System for Distributed Generation

3.4 Contribution of DG to Transmission System Fault Current

InthepreviousSCADAsystem,itwasimpossibletofigureoutthefaultcurrentcontributionofDGtotransmissionsystemwhenDGisconnectedondistributionsystem.However, the transmissionanddistribution integratedmonitoringandanalysissystemmakespossibletofindoutsuch faultcurrentcontribution.Table5shows theresultofcomparingthesizesoftransmissionsystem’sfaultcurrentas27MWdistributedpowerwasconnectedtoSouthGwangjusubstationsystems.Inthiscasestudyresult,notallsubstationsshowedahugeincreaseinfaultcurrentbutfaultcurrentlargelyincreasedinsubstations,which have large amount of DG in distribution line,such as South Gwangju substations and Hwasunsubstation.

Table 5 :Faultcurrentcomparison

Substation Fault current without DG (A)

Fault current with DG (A)

Hwasun 18572.8 20033.1SouthGwangju 17437.8 19879.5Songjung 24416.4 24858.8Naju 24332.7 25626.7Maewol 17439.1 18748.6Hwajeong 17029.2 18432.7Nongseong 16969 18411.7

5. CONCLuSIONInconventionalradialdistributionsystem,thenecessityoftransmissionanddistributionintegratedanalysiswaslessthanDGconnecteddistributionsystem.However,asDGpenetrationhasincreased,DGshavealargeimpactonpowersystems.ThoseDGsmakehardtoanalysisandoperatethepowersystem,especiallyindistributionsystem.ThispaperintroducedamethodologytoevaluatetheeffectonDGs in the transmissionanddistributionintegratedsystemonSouthKorea’spowersystems.Inaddition,casesstudywhichhasbeen impossiblewiththe existing separatedmethodwas conducted.Casestudy resultsshow thenecessityandeffectivenessoftransmissionanddistributionintegratedanalysis.Moreapplicationssuchasdistributionsystemreconfiguration,optimal placement ofESS/FACTSandOLTCcontrolbased on transmission and distribution integratedanalysiswillbedevelopedbyfurtherresearch.

BIBLIOGRAPhy1. The development of optimal operating system

in distribution networks based on distributionautomation. Final Report, Korea electric powercorporation,Daejeon,Korea

2. Photovoltaics,DispersedGeneration.(2011).IEEEGuide forDesign,Operation, and Integration ofDistributedResourceIslandSystemswithElectricPowerSystems.

Table 3 :Informationofswitchbetweentwosubstations

Substation 1 Bank No. Feeder name Substation 2 Bank No. Feeder nameSouthGwangju 3 Baekun Hwajeong 1 Daemyung

Table4shows thevoltages andphaseanglesofbothswitchsideswhenDGoutputand location ischanged.BeforeDGconnected,thereisonlyslightdifferenceexistbetweenbothendsofswitch.HoweverDGoutputandlocationmakeincreaseofphasedifferencewhichinterruptthecloseofnormallyopenswitch.AsDGpenetrationhasincreaseddistributionsystemoperatorhastoconsiderthephasedifferencebetweenbothendsofnormallyopenswitchbeforeitclose.AndthiscasestudyshowstheeffectivenessofverifyingthephasedifferencechangesduetoDGoutputandlocation.

Table 4 :Phaseangledifferencebetweenbothendsofswitch

Baekun feeder Daemyung feeder DifferenceMagnitude

(P.u)Angle Magnitude

(P.u)Angle Magnitude

(P.u)Angle

WithoutDG 1.0164 -19.37 1.0062 -19.74 0.0102 0.379MWDGinSouthGwangjudistribution

1.0273 -17.62 1.0097 -18.86 0.0176 1.24

30MWDGinSouthGwangjudistribution

1.0302 -16.88 1.0112 -18.44 0.0190 1.56

9MWDGinHwajeongdistribution

1.0200 -18.48 1.0179 -17.89 0.0021 -0.59



Energy Conservation is the Foundation of Energy Independence

3. Song, Chong-Suk, Suh, Jae-Wan, Jang,Moon-Jong,&Jang,Gil-Soo. (2013).Developmentof aTransmission/DistributionIntegratedAnalysisHybridAlgorithmforSystemOperationPlatformIncludingDistributed Generation. Journal of the KoreanInstitute of Illuminating andElectrical InstallationEngineers,27(1),35-45.

4. Sun, HB, & Zhang, BM. (2005). Global stateestimation forwhole transmissionanddistributionnetworks.Electricpowersystemsresearch,74(2),187-195.

5. Sun,Hongbin,&Zhang,Boming.(2008).Distributedpowerflowcalculationforwholenetworksincludingtransmissionanddistribution.Paper presentedattheTransmissionandDistributionConferenceandExposition,2008.T&D.IEEE/PES.

6. Corporation,ResearchCenteroftheKoreaElectricPower. (2012). A study on the new technicalguidelines for interconnection capacity ofdistributed generations in distribution system.Daejeon:KoreaTech.

7. Goswami,AK,Gupta,CP,&Singh,GK.(2008).Areaofvulnerabilityforpredictionofvoltagesagsbyananalyticalmethodinindiandistributionsystems.PaperpresentedattheIndiaConference,2008.INDICON2008.AnnualIEEE.

8.Park,CH,&Jang,G.(2005).Fastmethodtodetermineanareaofvulnerabilityforstochasticprediction of voltage sags. IEE Proceedings-Generation,TransmissionandDistribution,152(6),819-827.

BIOGRAPhICAL DETAILS OF ThE AuThORSJaewan SuhreceivedaB.SdegreefromtheSchoolofElectricalEngineering,KoreaUniversity,in2011.HeiscurrentlypursuingPh.D.degreeatKoreaUniversity.

yoon-Sung Cho, received a Ph. D. from KoreaUniversity,Koreain2008.HeworkedaseniorengineeratLSIndustrialSystemsCo.Ltdfrom2005to2012.Heis presently anassistant professor in theDepartmentofElectricandEnergyEngineering,CatholicUniversityofDaegu.Hisresearchinterestsincludepowersystemstability analysis,modeling, andenergymanagementsystems.

Gilsoo Jang receivedhisB.S.andM.S.degree fromKoreaUniversity,Korea.HereceivedhisPh.D.degreefrom Iowa State University in 1997. He worked inElectrical andComputer EngineeringDepartment atIowaStateUniversity as aVisitingScientist for oneyearandatKoreaElectricPowerResearchInstituteasaresearcherfor2years.HeispresentlyaProfessorofSchoolofElectricalEngineeringatKoreaUniversity.Hisresearchinterestsincludepowerquality,powersystemdynamicsandcontrol.


IntEGRatEd RolE of dIElECtRIC fluIds In PowER tRansfoRmERs and shunt REaCtoRs

K. Baburao, Nalin Nanavati and P.N. NarayananRaj Petro Specialities Pvt. Ltd.

ABSTRACT

The earliest research on electricity began in the sixteenth century through the pioneering efforts of William Gilbert hailed as the father of ‘electricity’. Several other great scientists followed the path breaking research and worked on many areas viz., static electricity and principal of conduction, electric current, impulse, induction, electromagnetism, electric motor and their applications during the period 1660 to 1890. Over the last century and beyond the world has witnessed exponential growth in the demand for electric power since every sphere of activity is dependent on it. This has resulted in rapid development of HV, EHV, and UHV, generation, transmission and distribution systems. Further in the recent times smart power grid systems have emerged revolutionizing entire power sector functioning. The smart power grid offers integrated services employing digital high end technology systems to gather and act on information to the benefit of power producers, transmission & distribution agencies and consumers.

Mineral oil based dielectric fluids have been integral part of transformers starting from 1890 and continue to be the preferred medium due its track record, good performance and competitive costs. As the generation and transmission systems grew from, LV, MV, HV, EHV & UHV the quality of dielectric fluids also kept pace to conform to the rigid standards, thanks to the technological advancements in refining. Modern catalytic hydro processed mineral dielectric fluids apart from meeting the thermal and electrical stresses constantly varying due to load factors have also proven characteristics to comply with environmental issues; a major factor in the present times. We have the present generation mineral oil based dielectric fluids, synthetic ester and natural ester based fluids fulfilling all these requirements.

The prime function of dielectric fluids has always been to insulate and cool the system. In the present times its role has been expanded far beyond these two important functions. Dielectric fluids today are the most accurate diagnostic media to monitor and assess the overall health of the power transformers and shunt reactors.

In this paper we are discussing about the integral role of dielectric fluids in the life management of transformers and reactors. We also present one case study about the exceptional quality of present generation hydro processed dielectric fluids.

Keywords : power transformer; shunt reactor; present generation dielectric fluid; conventional naphthenic oils; dielectric status; ageing status; degradation status; biodegradability;

1. INTRODuCTIONTransformer like its creator - the humanbeing leadsastressful life. It issubjectedtomultiplestresses likethermal,electrical,magneticandmechanical. Inorderthatitisabletoperformunderthesevaryingconditionsallthecomponentsinthesystemhavetobeinperfectworking condition.While this is an ideal situation theverycomplexnatureofthetransmissionsystemwherenewandagedtransformersco-existastrictregimeofcontinuousmonitoring systemhas to be createdandmaintained to ensure good health and trouble freeservice.

Dielectricfluidshavebeenintegralpartoftransformersstarting from1890. The role of dielectric fluids is to

insulate,coolandcarryinformationaboutthehealthofthesystem.Transformersandreactorsarecomposedofanumberofspecializedfunctionalsubsystemsintegratedintoaunit.Eachoneofthesesubsystemshasauniquerole to performwithin theoverall system.The criticalfunctionsoftheindividualsubsystem[1]shouldalwaysbemaintainedatoptimumconditiontopreventfailures(Dielectric System, ElectromagneticCircuit, Currentcarryingcircuit,Mechanicalsystem,Voltageregulatingsystem,Containmentsystem,ExternalInterfaceSystemandCoolingsystem).

Interestinglytherearesimilaritiesbetweenatransformerandahumanbodyparticularlythecirculatingfluidswhichfurnish information fordiagnosticstudiesasshown inFigure1.



In thispaperwepresent theexceptionalperformanceofthepresentgenerationmoderndielectricfluidsin400kV,315MVAtransformers.

1.1 Deterioration of Insulation (Liquid & Solids) System

Dielectric fluid primarily functions as insulating andcoolingmedium in the transformer & reactor. Theoperationalstressinsidetheequipmentinserviceandageingfactorscausegenerationofmoisture,acidsandgases.Excessivepresenceof thedecayproducts[2],[3]will lead to accelerated deterioration in the dielectricstrengthofthefluidapartfromdamagingthecellulose.Thiswill calls for timely in-depthanalysisofdielectricfluid to determinewhether re-conditioningwill sufficeor replacement is the solution toward off equipmentfailure.

1.1a Moisture Contamination in the System and its consequences

The presence of oxygen coupledwithmoisture andelevated temperaturewill pose serious hazard to theinsulation system.Even tracemoisture is harmful topower transformers and reactors.Moisture has threesources– ingress causedby defective sealing, entryfromatmosphere via breather, structural componentsinside the transformer.Moisture is responsible for therapid deterioration of both the dielectric fluid and thepaperinsulation[4].Reactionsinthepresenceofmoistureincrease thewater availability leading to transformerfailure.Asperexpertsoxygenlevelsmorethan2,000ppm

indielectricfluidgreatlyacceleratepaperdeterioration.Itisrecommendedthatifoxygenreaches10,000ppmintheDGA,theoilshouldbede-gassedandnewoxygeninhibitorinstalled.Delayininitiatingremedialmeasurestoremovemoistureanddrytheequipmentcanresultinfailurewithfinancialimplication.

1.1b Particulate Contamination in the System and its consequences

Particlesininsulatingoilintransformers&reactorsareamajor sourceof concern in the lifemanagement oftheasset[5].Severaltypesofparticlesarefoundduetoa variety of causes.Cellulose fibres, iron, aluminium,copper, zinc andother particles aregeneratedat themanufacturingstageandduetooperationalwearandageing.MigrationsofcarbonparticlesfromOLTCintoinsulatingfluidsalsocontaminatecriticalparts.Henceconstantmonitoringofparticulateinthedielectricfluidwillenabletimelyintervention.Failurestoinitiatetimelyactioncanresultinfailureoftheequipment.

1.1c Ageing of Insulation (solid and liquid) SystemAgeing of insulation system is an inevitable andirreversiblephenomenonintheservicelifeoftransformerand reactor.Agingof insulation is predominantly dueto hydrolysis, pyrolysis and oxidation. Temperature,moistureandoxygenarethemainagentsofcelluloseandoildecomposition.Theactivationenergyofpyrolysisis higher than the hydrolysis leading to continuousdecomposition of insulation even at 110-120°Ctemperatures. The ageing process of insulation is

[email protected] 2

1. IntRoduCtIon Transformer like its creator - the human being leads a stressful life. It is subjected to multiple stresses like thermal, electrical, magnetic and mechanical. In order that it is able to perform under these varying conditions all the components in the system have to be in perfect working condition. While this is an ideal situation the very complex nature of the transmission system where new and aged transformers co-exist a strict regime of continuous monitoring system has to be created and maintained to ensure good health and trouble free service. Dielectric fluids have been integral part of transformers starting from 1890. The role of dielectric fluids is to insulate, cool and carry information about the health of the system. Transformers and reactors are composed of a number of specialized functional sub systems integrated into a unit. Each one of these sub systems has a unique role to perform within the overall system. The critical functions of the individual sub system [1] should always be maintained at optimum condition to prevent failures (Dielectric System, Electromagnetic Circuit, Current carrying circuit, Mechanical system, Voltage regulating system, Containment system, External Interface System and Cooling system). Interestingly there are similarities between a transformer and a human body particularly the circulating fluids which furnish information for diagnostic studies as shown in Figure 1.

Figure 1 Circulating Fluids – Similarities between a Transformer and a Human Body

In this paper we present the exceptional performance of the present generation modern dielectric fluids in 400 kV, 315 MVA transformers.

1.1. deterioration of Insulation (liquid & solids) system Dielectric fluid primarily functions as insulating and cooling medium in the transformer & reactor. The operational stress inside the equipment in service and ageing factors cause generation of moisture, acids and gases. Excessive presence of the decay products [2], [3] will lead to accelerated deterioration in the dielectric strength of the fluid apart from damaging the cellulose. This will calls for timely in-

Figure 1:CirculatingFluids–SimilaritiesbetweenaTransformerandaHumanBody

11


Integrated Role of Dielectric Fluids in Power Transformers and Shunt Reactors

initiatedbymoistureinpresenceofacidcatalystsfromtheoxidizedoil.Oneoftheimportantby-productsduetodegradationofsolidinsulationisfuraniccompounds.Significantpresenceoffuraniccompoundsparticularly2FAL indicates the deterioration in the degree ofpolymerization (DP) of the cellulose paper. Ageingprocesscanbeslowediftimelypreventiveactionsareinitiated to removewater, oxygen, acidsand keepingthesystemcooler.

1.1d Dissolved Gas Analysis (DGA) and its consequences

DiagnosticstudyofthedissolvedgasthroughdielectricfluidsisoneofthemostimportanttoolstounderstandthehealthofTransformersandreactors.Transformersandreactorsinservicearepronetodevelopinggasesduetovariousoperationalstresses[6].FaultgaseslikeHydrogen-H2,Methane-CH4,Ethane-C2H6,Ethylene-C2H4,Acetylene-C2H2&CarbonMonoxide-COiffoundinsignificantppmlevelswillneedtobemonitoredandappropriate corrective actions initiatedwithout lossoftimetoprotectthecostlyequipment.GaseslikeOxygen-O2,Nitrogen-N2,andCarbondioxide-CO2arerelatedtoatmosphereandwill innowayaffect the insulationsystem.One important factor to bear inmindwhileanalyzingDGA isnot to rush intoanyhasty remedialactionwithoutapropertrendanalysis.

DGAdatacanprovide

• Earlywarningoffaultsdevelopinginthetransformers&reactors.

• Planrepairschedules

• Trendanalysisofthefaultgasestomonitoranymajorrelease

1.1e Collateral Damages of DegradationThedielectricfluidsalsorevealseveralotherabnormalitiesdevelopinginsidetransformersandreactorsinservicesuchas

• Conductive particles – reduction in dielectricstrength

• Dissolvedwater – reduction in dielectric safetymargin

• Bubbleformation–partialdischarge-PD,reductionininterfacialtension-IFT

• Furanic Compounds – reduction inmechanicalstrengthofcellulosepaper(DP)&carbonoxidegasformation

• Sludgeformation–increaseinviscosity,increaseinacidityoftheoil

2. DIELECTRIC FLuID - AS A DIGNOSTIC MEDIAItiswellestablishedthatintegratedroleofdielectricfluidfurnishesmorethan70%ofthediagnosticinformationrelatingtothefunctionalstatusofthepowertransformersand shunt reactors. Study of different functionalpropertiesofthedielectricfluidfacilitatesunderstandingandcorrectiveactionasrequiredinthelifemanagementof the power transformers and reactors as shown inTable1.

Table 1:CIGRE’sDielectricFluidBasedInformationforTransformerLifeManagement[2]

DielectricFluidCharacterization DielectricFluidBasedInformation

DielectricStatus AgeingStatus Degradation

FluidComposition–CarbonTypes WaterContent VisibleSpectrum DGA

SpecificGravity PercentSaturation Acidity FuranicCompounds

KinematicViscosity BoundWater InhibitorContent Phenols

DielectricConstant ParticleProfile IFT Cresols

PCAcontent DielectricStrength FTIR DissolvedMetals

InhibitorContent ImpulseStrength DielectricDissipationFactor

ParticleProfile

MetalPassivatorContent ChargingTendency Resistivity ExtendedDGA

PCBcontent Resistivity Turbidity

TotalSulphur DielectricDissipationFactor

Sludgecontent

CorrosiveSulphur InsolubleSludge FreeRadicals

RefractiveIndex GassingTendency FuranicCompounds

PDInceptionVoltage PolarizationIndex OxidationStabilityTest



3. EXPERIMENTAL RESuLTS AND DISCuSSIONSPresentGenerationmodern catalytic hydroprocesseddielectric fluids (PGHDF) are in use inmany powertransformers and reactors in Indian utilities since thelast two decades. From the year 2009 onward wearemonitoring25powertransformersandreactors toevaluatetheirperformance

CASE STuDyOneoftheEHVtransformertakenupforourstudieswasmanufacturedin2003andcomissionedintheyear2004.Thehistoricaldataontheloadingconditions, typesof

repairsandinformationondielectricfluidisasshowninTable2.Thispowertransformerisbeingmonitoredfortheintegratedroleofpresentgenerationhydroprocesseddielectricfluidsince2009foritsdiagnosticinformation–characterizationoffluidparameters,dielectricstatus,ageingstatus,degradationstatusandkeycombustiblegas concentration as shown inFigures 2 - 5.All thedielectricproperties[7],[8]areregularyanalysedasperIEC60422andDGAasper IEEE-C57.104.ThedielectricpropertiesofthefluidarewellwithintherecommendedlimitsprescribedinIEC60422.InFigures4&5thetotalacidity-TA,totalsludge-TS&dissolvedmetals-DMvaluesarezeroandarenotreadable.

Table 2 :MonitoringDataonEHVTransformer

LoadingConditions,Repiars&DielectricFluidBasedInformation-315MVA,400kV/220kVEHVTransformer

QuantityofMCHDF,Ltr 84000

Agein-Service 11Years

DetailsofRepairs OLTCOilchangedin2012

YearofMonitoring 2009 2010 2011 2012 2013 2014 2015

PeakLoad,MW 180 160 140 150 180 180 300

OffPeakLoad,MW 90 85 74 55 110 55 50

PeakTemperature,°C 56 55 55 54 56 60 70

WindingTemperature,°C 50 50 56 56 58 52 57

Dielectric Status

WaterContent,ppm 5 7 4 12 9 11 9

BDV,kV 78 75 80 67 63 65 75

DDF(TanDelta)at90°C 0.002 0.0107 0.0063 0.0064 0.0134 0.0056 0.0065

Resistivityat90°C 10 15 21 26 16 17 25

Ageing Status

IFT,mN/m 38 35 38 38 35 35 38

TA,mgKOH/g 0.001 0.001 0.001 0.001 0.001 0.001 0.001

TS,bywt% 0.001 0.001 0.001 0.001 0.001 0.001 0.001

2FAL,ppb 0 0 0 0 0 0 0

Degradation Status

ParticleProfile-(14/11/8to17/15/12)NAS1638

7 7 7 7 8 8 8

DissolvedMetals(DM) 0 0 0 0 0 0 0

2FAL,ppb 0 0 0 0 0 0 0

13


Integrated Role of Dielectric Fluids in Power Transformers and Shunt Reactors

[email protected] 6

Figure 2 – Dielectric Status of PGDF in PT Figure 3 – Ageing Status of PGDF in PT

Figure 4 – Degradation Status of PGDF in PT

The dissolved combustible gas concentration is well within the limit as per IEEE guide for the interpretation as given in Table III. Where as the ethane gas is in conditon 2 limit apparently due to the contaminaion from the OLTC oil. The result is as shown in Figure 6.

Table III. Dissolved Gas Analysis of EHV Transformer

Gas, ppm Hydrogen Oxygen Methane Ethane Ethylene Acetylene Carbon Monoxide

Carbon Dioxide Nitrogen

2009 11 17900 2 1 1 0 0 270 38700

2010 9 2580 31 57 16 0 627 1969 61600

2011 0 4000 0 64 17 0 498 2154 32100

2012 4 25000 0 77 22 0 582 2216 50640

2013 0 5192 53 112 22 0 492 2350 56229

2014 0 22000 23 103 13 0 77 1709 59000

2015 0 3000 39 125 18 0 379 3029 70000

0 10 20 30 40 50 60 70 80 90

2008 2010 2012 2014 2016 Water Content, ppm BDV, kV DDF (Tan Delta) at 90°C Resistivity at 90°C

dielectric status kv

, dd

f, p

pm, o

hm

0 5

10 15 20 25 30 35 40

2005 2010 2015 2020

IFT, mN/m TA, mg KOH/g

TS, by wt% 2FAL, ppb

ageing status

ta

, ts,

2fa

l, I

ft

0 1 2 3 4 5 6 7 8 9

2008 2009 2010 2011 2012 2013 2014 2015 2016

Particle Profile-(14/11/8 to17/15/12) NAS 1638 Dissolved Metals (DM) 2FAL

degradation status

na

s, 2

fal

, dm

[email protected] 6







2009 11 17900 2 1 1 0 0 270 38700

2010 9 2580 31 57 16 0 627 1969 61600

2011 0 4000 0 64 17 0 498 2154 32100

2012 4 25000 0 77 22 0 582 2216 50640

2013 0 5192 53 112 22 0 492 2350 56229

2014 0 22000 23 103 13 0 77 1709 59000

2015 0 3000 39 125 18 0 379 3029 70000

0 10 20 30 40 50 60 70 80 90


dielectric status

kv, d

df,

ppm

, ohm

0 5

10 15 20 25 30 35 40

2005 2010 2015 2020



ageing status

ta

, ts,

2fa

l, I

ft

0 1 2 3 4 5 6 7 8 9

2008 2009 2010 2011 2012 2013 2014 2015 2016


degradation status

na

s, 2

fal

, dm

Fig. 2:DielectricStatusofPGDFinPT Fig. 3:AgeingStatusofPGDFinPT

Fig. 4:DegradationStatusofPGDFinPT

[email protected] 6







2009 11 17900 2 1 1 0 0 270 38700

2010 9 2580 31 57 16 0 627 1969 61600

2011 0 4000 0 64 17 0 498 2154 32100

2012 4 25000 0 77 22 0 582 2216 50640

2013 0 5192 53 112 22 0 492 2350 56229

2014 0 22000 23 103 13 0 77 1709 59000

2015 0 3000 39 125 18 0 379 3029 70000

0 10 20 30 40 50 60 70 80 90


dielectric status kv

, dd

f, p

pm, o

hm

0 5

10 15 20 25 30 35 40

2005 2010 2015 2020



ageing status

ta

, ts,

2fa

l, I

ft

0 1 2 3 4 5 6 7 8 9

2008 2009 2010 2011 2012 2013 2014 2015 2016


degradation status

na

s, 2

fal

, dm

[email protected] 7

Figure 5 – DGA of present generation dielectric fluids in PT

4. ConClusIon

As it will be observed the present generation hydro processed dielectric fluids perform excellently in its integrated role in the power transformer and reactors. The present generation dielectric fluids offer several advantages

Free from harmful corrosive sulfur, other contaminants and have better stability Excellent response to oxidation inhibitors – very slow depletion of inhibitor Excellent heat transfer capability at all temperature gradients including cold start Exceptional good stability ensure longer life for the asset Nontoxic, biodegradable and hence environmentally safe Better asset reliability, less breakdown risks Easily available at affordable costs Reduced maintenance requirements

5. aCknowlEdGEmEnts

The authors would like to thank their colleagues from technical service and QC departments for the technical support

6. bIblIoGRaPhy

[1] John E. Skog P.E. “Business Case for Transformer On-Line Monitoring” EPRI Diagnostic Conference – July 2006

[2] CIGRE Working Group12.18 “Life Management of Transformers” Draft Final Report Rev-2, 22 June 2002

[3] Victor Sokolov, A. Bassetto, T. V. Oommen, T. Haupert, and D. Hanson, “Transformer Fluid: A Powerful Tool for the Life Management of an Ageing Transformer Population” TechCon 2003 Asia-Pacific

[4] CIGRE Report of WG 12.18 “Moisture equilibrium & moisture migration within transformer insulation system”

[5] CIGRE Report of WG 12.17 “Effect of Particle on Transformer Dielectric Strength”

0 100 200 300 400 500 600 700

H2 CH4 C2H2 C2H4 C2H6 CO

2009 2010 2011 2012 2013 2014 2015

Ppm

Gas

Cumbustible Dissolved Gas Concentration

Fig. 5 :DGAofpresentgenerationdielectricfluidsinPT



4. CONCLuSIONAs it will be observed the present generation hydroprocessed dielectric fluids perform excellently in itsintegratedroleinthepowertransformerandreactors.

The present generation dielectric fluids offer severaladvantages

• Freefromharmfulcorrosivesulfur,othercontaminantsandhavebetterstability

• Excellentresponsetooxidationinhibitors–veryslowdepletionofinhibitor

• Excellentheattransfercapabilityatalltemperaturegradientsincludingcoldstart

• Exceptionalgoodstabilityensurelongerlifefortheasset

• Nontoxic,biodegradableandhenceenvironmentallysafe

• Betterassetreliability,lessbreakdownrisks

• Easilyavailableataffordablecosts

• Reducedmaintenancerequirements

AcknowledgementsTheauthorswould like to thank theircolleagues fromtechnicalserviceandQCdepartmentsforthetechnicalsupport

BIBLIOGRAPhy

1. JohnE.SkogP.E.“BusinessCaseforTransformerOn-LineMonitoring”EPRIDiagnosticConference–July2006

2. CIGREWorkingGroup12.18“LifeManagementofTransformers”Draft FinalReportRev-2, 22 June2002

3. Victor Sokolov, A. Bassetto, T. V.Oommen, T.Haupert, andD.Hanson, “Transformer Fluid: APowerfulToolfortheLifeManagementofanAgeingTransformer Population” TechCon 2003 Asia-Pacific

4. CIGREReportofWG12.18“Moistureequilibrium&moisturemigrationwithin transformer insulationsystem”

5. CIGREReportofWG12.17 “EffectofParticleonTransformerDielectricStrength”

6. K.Baburao,NalinNanavati,P.N.Narayanan“CriticalRoleofDielectricFluid in the lifeManagementofPowerTransformersandShuntReactors –CaseStudies”13thIndiaDoblePowerForum,Vadodara15-16October,2015

7. IEC 60422 - ed.4 “Mineral insulating oils inelectricalequipment-Supervisionandmaintenanceguidance”

8. InsulatingFluid–WGC-57.104-InsulatingFluids-DGAGuide

The dissolved combustible gas concentration iswellwithinthelimitasperIEEEguidefortheinterpretation

as given in Table 3.Where as the ethane gas is inconditon2limitapparentlyduetothecontaminaionfromtheOLTCoil.

Table 3:DissolvedGasAnalysisofEHVTransformer

Gas, ppm

hydrogen Oxygen Methane Ethane Ethylene Acetylene Carbon Monoxide

Carbon Dioxide

Nitrogen

2009 11 17900 2 1 1 0 0 270 387002010 9 2580 31 57 16 0 627 1969 616002011 0 4000 0 64 17 0 498 2154 321002012 4 25000 0 77 22 0 582 2216 506402013 0 5192 53 112 22 0 492 2350 562292014 0 22000 23 103 13 0 77 1709 590002015 0 3000 39 125 18 0 379 3029 70000


oPERatIonal ExPERIEnCE In 1200 kv natIonal tEst statIon (uhvaC), IndIa

I.S. Jha, B.N. De. Bhowmick, S.B.R. Rao, Dhyeya. R. Shah and Rachit SrivastavaPower Grid Corporation of India Limited

R.K. SinghBharat Heavy Electrical Limited, Bhopal

S.V. Kulkarni and Santosh KumarIndian Institute of Technology, Bombay

ABSTRACT

POWERGRID in association with Indian manufacturers have established a 1200kV National Test Station (NTS) at Bina, Madhya Pradesh, India with an objective of developing indigenous Ultra High Voltage AC (UHVAC) equipment and to gain first hand operational experience before full scale commercialization of UHVAC technology in Indian grid. The other objectives of this test station are to facilitate long term performance evaluation and carrying out optimization studies on 1200kV class equipment. Operational experience gained from NTS is very crucial for finalizing specifications of 1200kV equipment for the upcoming 1200 kV projects in India.

This paper gives a glimpse on present status of 1200 kV NTS facility and challenges faced during manufacturing, installation, commissioning and operation of the facility. This paper also describes a typical fault experienced in 1200 kV National Test Station (NTS) and its systematic investigation. Immediately, after charging of 1200 kV test station from 400 kV side of 400/1200 kV transformer (three single phase units) a flashover was seen on outer side of tank of one of these transformers and all three single phase units got tripped on over-current. It was initially assumed that there was fault internal to transformer however all test results showed that transformer was in healthy condition. In-depth study was carried out in PSCAD software, to simulate the actual scenario. The results of the simulation study are also discussed in this paper.

Keywords : 1200 kV, National test station, UHVAC, SFRA, Inrush current, Corona, Thermo vision scanning, Transformer, Circuit breaker, Fault

15

BACKGROuND1200kVNationalTestStation,Binahasbeenestablishedwith an objective of indigenous development ofUHVACequipment in Indiaand to facilitate long termperformanceevaluation&optimizationof1200kVclassequipment.1200kVNTSprojecthasbeendevelopedunderPublic-Private-Partnershipmodel(PPP),where-in equipment has been developed bymanufacturesindigenouslyandPOWERGRIDhasprovidedtestbedforperformanceevaluation&optimizationstudies.35Indianmanufacturershave joined theendeavourwithPOWERGRIDtoestablishthisproject.

1. 1200 kV NATIONAL TEST STATION - SALIENT DESIGN CONSIDERATIONS

Considering requirement of high power transfercapability, large size of equipment, transportationlimitations and cost optimization, the Indian 1200kV

systemhasbeendesignedwithanoptimuminsulationlevel(LIWL&SIWL)(Fig.1(a))andreducedprotectionmarginbyutilizinghighperformancemulti-columnsurgearrestors(Fig.1(b)).Continuousremotemonitoringisputin place tomonitor performanceof severely stressedsurgearrestors.Itwasenvisagedduringdesignstagethattapchangingshallbecarriedoutatlowervoltagelevellike400kVandaccordinglytapchangershavenotbeenprovidedwithauto-transformers.Though1200kVteststationisAirInsulatedSwitchgear(AIS)type,1200kVCircuitBreakerschosenaredeadtanktype(Fig.1(c))insteadoflivetankbecauseofstabilityconsiderations.Buspost insulatorsareof tripodarrangement.Towerstructuresat the teststationhavebeenprovidedwithprovision tovarygroundclearanceaswellasphase-phase clearance for experimentation.Engineering oftheswitchyardwascarriedoutfurthertoexperimentalstudiesfinalizingtheclearance(Fig.1(d))andconductor



andbusbarconfiguration.Conductorsusedinswitchyardandtestlinearehaving8sub-conductorsforCoronaandAudiblenoisecontrol.Technicalparametersof1200kV

equipmentwereobtainedbycarryingoutvariousstudiesandwere not extrapolated from existing 400/800kVsystem.

2. 1200 kV PROJECT OVERVIEw AND SINGLE LINE DIAGRAM

1200kVNationalteststationprojectisbeingimplementedintwophases(Phase-I&Phase-II).SingleLineDiagram(SLD)of1200kVNTSindicatingPhase-I&IIof1200kVNTS,BinaisgiveninFig.2.Phase-Iof1200kVprojectcomprisesofone1200kVbays&1.1kmofsinglecircuit

Fig. 1(a):Insulationlevelrequirementfordifferentvoltagelevels

(S/C) test line (Fig. 3(a))whilePhase-II comprisesofother1200kVbay&0.8kmdoublecircuit(D/C)testline(Fig.3(b)).Phase-Iof1200kVNTSincludingS/Ctestlinewaschargedunderno-loadconditionon26thMay,2012.Erectionworksinphase-IIarealreadycompletedand interconnectionworkson400kVsideofphase-IIareinprogress.CommissioningofPhase-IIwillestablishpowerflowthrough1200kVline.

Figure 1(b):1200kVMulti-columnsurgearrestors

Fig. 1(c):1200kVDeadtankbreaker Fig. 1(d):1200kVtowerwindowsimulation

1

BACKGROUND

1200kV National Test Station, Bina has been established with an objective of indigenous development of UHVAC equipment in India and to facilitate long term performance evaluation & optimization of 1200 kV class equipment. 1200kV NTS project has been developed under Public-Private-Partnership model (PPP), where-in equipment has been developed by manufactures indigenously and POWERGRID has provided test bed for performance evaluation & optimization studies. 35 Indian manufacturers have joined the endeavour with POWERGRID to establish this project.

1. 1200kV National Test Station - Salient Design Considerations

Considering requirement of high power transfer capability, large size of equipment, transportation limitations and cost optimization, the Indian 1200kV system has been designed with an optimum insulation level (LIWL & SIWL) (Fig.1(a))and reduced protection margin by utilizing high performance multi-column surge arrestors (Fig.1(b)). Continuous remote monitoring is put in place to monitor performance of severely stressed surge arrestors. It was envisaged during design stage that tap changing shall be carried out at lower voltage level like 400kV and accordingly tap changers have not been provided with auto-transformers. Though 1200kV test station is Air Insulated Switchgear (AIS) type, 1200kV Circuit Breakers chosen are dead tank type (Fig.1 (c)) instead of live tank because of stability considerations. Bus post insulators are of tripod arrangement. Tower structures at the test station have been provided with provision to vary ground clearance as well as phase-phase clearance for experimentation. Engineering of the switchyard was carried out further to experimental studies finalizing the clearance (Fig.1 (d)) and conductor and bus bar configuration. Conductors used in switchyard and test line are having 8 sub-conductors for Corona and Audible noise control. Technical parameters of 1200kV equipment were obtained by carrying out various studies and were not extrapolated from existing 400/800kV system.

Figure 1(a):Insulation level requirement for different voltage levels

Figure 1(b): 1200kV Multi-column surge arrestors

Figure 1(c): 1200kV Dead tank breaker

Figure 1(d): 1200kV tower window simulation

1

BACKGROUND

1200kV National Test Station, Bina has been established with an objective of indigenous development of UHVAC equipment in India and to facilitate long term performance evaluation & optimization of 1200 kV class equipment. 1200kV NTS project has been developed under Public-Private-Partnership model (PPP), where-in equipment has been developed by manufactures indigenously and POWERGRID has provided test bed for performance evaluation & optimization studies. 35 Indian manufacturers have joined the endeavour with POWERGRID to establish this project.

1. 1200kV National Test Station - Salient Design Considerations

Considering requirement of high power transfer capability, large size of equipment, transportation limitations and cost optimization, the Indian 1200kV system has been designed with an optimum insulation level (LIWL & SIWL) (Fig.1(a))and reduced protection margin by utilizing high performance multi-column surge arrestors (Fig.1(b)). Continuous remote monitoring is put in place to monitor performance of severely stressed surge arrestors. It was envisaged during design stage that tap changing shall be carried out at lower voltage level like 400kV and accordingly tap changers have not been provided with auto-transformers. Though 1200kV test station is Air Insulated Switchgear (AIS) type, 1200kV Circuit Breakers chosen are dead tank type (Fig.1 (c)) instead of live tank because of stability considerations. Bus post insulators are of tripod arrangement. Tower structures at the test station have been provided with provision to vary ground clearance as well as phase-phase clearance for experimentation. Engineering of the switchyard was carried out further to experimental studies finalizing the clearance (Fig.1 (d)) and conductor and bus bar configuration. Conductors used in switchyard and test line are having 8 sub-conductors for Corona and Audible noise control. Technical parameters of 1200kV equipment were obtained by carrying out various studies and were not extrapolated from existing 400/800kV system.

Figure 1(a):Insulation level requirement for different voltage levels

Figure 1(b): 1200kV Multi-column surge arrestors

Figure 1(c): 1200kV Dead tank breaker

Figure 1(d): 1200kV tower window simulation

2

2. 1200kV Project Overview and Single Line Diagram

1200kV National test station project is being implemented in two phases (Phase-I & Phase-II). Single Line Diagram (SLD) of 1200kV NTS indicating Phase-I & II of 1200kV NTS, Bina is given in Fig.2. Phase-I of 1200kV project comprises of one 1200kV bays & 1.1 km of single circuit (S/C) test line (Fig. 3(a)) while Phase-II comprises of other 1200kV bay & 0.8 km double circuit (D/C) test line (Fig.3(b)). Phase-I of 1200kV NTS including S/C test line was charged under no-load condition on 26th May, 2012. Erection works in phase-II are already completed and interconnection works on 400kV side of phase-II are in progress. Commissioning of Phase-II will establish power flow through 1200kV line.

Figure 2: Single Line Diagram (SLD) of 1200kV National Test Station (NTS), Bina

Figure 3(a): 1200kV Single circuit test line (S/C tower height: 55m)

Figure 3(b): 1200kV Double circuit test line (D/C tower height: 125m)

Phase-I

Phase-II

Fig. 2 :SingleLineDiagram(SLD)of1200kVNationalTestStation(NTS),Bina

17


Operational Experience in 1200 kV National Test Station (UHVAC), India

3. PERFORMANCE EVALuATION OF EquIPMENT AFTER 1ST ChARGING

Onemajor objective of this project is to carry outperformanceevaluationandtocarryoutoptimizationstudiesonequipment.AllPre-commissioning&on-siteacceptancetestswerecarriedoutonequipmentof different makes and design, before chargingequipmentinNTS.Additionally,variousroutinetestsandmeasurementslikeElectricfield,Magneticfield,Thermo-vision scanning, Corona imaging, SFRA,In-rushcurrentmeasurements,voltageprofiling,etc.are being carried out to evaluate performance ofequipment and feedback is sharedwith respectivemanufacturers. Brief details/results of some of thekeymeasurements carried out after the successfulchargingeventarepresentedbelow:

(a)Recorded Voltage and Current Waveforms:1200kVvoltageandcurrentwaveformsrecordedunderno-loadconditionareshowninFig.5andtheirtypicalvaluesaretabulatedbelow:

Table 1:1200kVVoltageandCurrentunderno-loadconditions

Sl. No.

Parameter R-N y-N B-N

1. 1200kVsidevoltage

700kV 722kV 715kV

2. 1200kVsidecurrent

22.2A 18.8A 17.6A

2

2. 1200kV Project Overview and Single Line Diagram

1200kV National test station project is being implemented in two phases (Phase-I & Phase-II). Single Line Diagram (SLD) of 1200kV NTS indicating Phase-I & II of 1200kV NTS, Bina is given in Fig.2. Phase-I of 1200kV project comprises of one 1200kV bays & 1.1 km of single circuit (S/C) test line (Fig. 3(a)) while Phase-II comprises of other 1200kV bay & 0.8 km double circuit (D/C) test line (Fig.3(b)). Phase-I of 1200kV NTS including S/C test line was charged under no-load condition on 26th May, 2012. Erection works in phase-II are already completed and interconnection works on 400kV side of phase-II are in progress. Commissioning of Phase-II will establish power flow through 1200kV line.

Figure 2: Single Line Diagram (SLD) of 1200kV National Test Station (NTS), Bina

Figure 3(a): 1200kV Single circuit test line (S/C tower height: 55m)

Figure 3(b): 1200kV Double circuit test line (D/C tower height: 125m)

Phase-I

Phase-II

Fig. 3(a):1200kVSinglecircuittestline(S/Ctowerheight:55m)

Fig. 3(b):1200kVDoublecircuittestline(D/Ctowerheight:125m)

Fig. 4 :Sectionallayoutof1200kVbay

3

Figure 4: Sectional layout of 1200kV bay

3. Performance Evaluation of Equipment after 1st Charging

One major objective of this project is to carry out performance evaluation and to carryout optimization studies on equipment. All Pre-commissioning & on-site acceptance tests were carried out on equipment of different makes and design, before charging equipment in NTS. Additionally, various routine tests and measurements like Electric field, Magnetic field, Thermo-vision scanning, Corona imaging, SFRA, In-rush current measurements, voltage profiling, etc. are being carried out to evaluateperformance of equipment and feedback is shared with respective manufacturers. Brief details/results of some of the key measurements carried out after the successful charging event are presented below:

Recorded Voltage and Current waveforms: 1200kV voltage and current waveforms recorded under no-load condition are shown in Fig.5 and their typical values are tabulated below:

Sr. no. Parameter R-N Y-N B-N 1. 1200kV side voltage 700 kV 722kV 715 kV 2. 1200kV side current 22.2A 18.8A 17.6A

Table 1: 1200kV Voltage and Current under no-load conditions

Figure 5: Recorded 1200kV phase voltage and current waveforms



Table 2:Inrushcurrentsdrawnduringacharging

R-phase (rms) y-phase (rms) B-phase (rms)1.16kA 1.16kA 2.71kA

(b)Inrush Current:Inrushcurrentsarerecordedtokeepa check on transformer core condition.A typicalinrush current recorded from 400kV side duringchargingofNTSphase-Iaretabulatedbelow.Fig.6showsinrushcurrentwaveformsrecordedduringatypicalchargingevent.

3

Figure 4: Sectional layout of 1200kV bay

3. Performance Evaluation of Equipment after 1st Charging

One major objective of this project is to carry out performance evaluation and to carryout optimization studies on equipment. All Pre-commissioning & on-site acceptance tests were carried out on equipment of different makes and design, before charging equipment in NTS. Additionally, various routine tests and measurements like Electric field, Magnetic field, Thermo-vision scanning, Corona imaging, SFRA, In-rush current measurements, voltage profiling, etc. are being carried out to evaluateperformance of equipment and feedback is shared with respective manufacturers. Brief details/results of some of the key measurements carried out after the successful charging event are presented below:

Recorded Voltage and Current waveforms: 1200kV voltage and current waveforms recorded under no-load condition are shown in Fig.5 and their typical values are tabulated below:

Sr. no. Parameter R-N Y-N B-N 1. 1200kV side voltage 700 kV 722kV 715 kV 2. 1200kV side current 22.2A 18.8A 17.6A

Table 1: 1200kV Voltage and Current under no-load conditions

Figure 5: Recorded 1200kV phase voltage and current waveforms

4

Inrush current : Inrush currents are recorded to keep a check on transformer core condition. A typical inrush current recorded from 400kV side during charging of NTS phase-I are tabulated below. Fig.6 shows inrush current waveforms recorded during a typical charging event.

R-phase (rms) Y-phase (rms) B-phase (rms) 1.16 kA 1.16 kA 2.71 kA

Table 2: Inrush currents drawn during a charging

Figure 6: Recorded inrush current waveforms during a typical charging event.

Corona measurements: Corona performances of all equipment after charging were assessed for their effectiveness in limiting corona. Fig. 7 shows the corona performance of 1200kV corona ring installed on transformer bushing. Issue of high corona was faced with some of the line connectors due to surface distortion and same were re-installed after repair/smoothening of surfaces as a part of corrective action.

Figure 7: Corona image taken by handheld corona camera near 1200kV bushing

Thermo-vision scanning: Thermo-vision scanning of equipment was carried out under no-load condition to detect any abnormalities in the operating temperature or hot spots in the equipment. No abnormalities were observed during the test except in one of the line connectors and it was attributed to loose connection, which was resolved. Fig.8 below shows thermo-vision scanning images taken for transformer, bushing of 1200kV CB and 1200kV surge arrestor. Once power flow is established after works in phase-II and interconnection activities are completed from

4

Inrush current : Inrush currents are recorded to keep a check on transformer core condition. A typical inrush current recorded from 400kV side during charging of NTS phase-I are tabulated below. Fig.6 shows inrush current waveforms recorded during a typical charging event.

R-phase (rms) Y-phase (rms) B-phase (rms) 1.16 kA 1.16 kA 2.71 kA

Table 2: Inrush currents drawn during a charging

Figure 6: Recorded inrush current waveforms during a typical charging event.

Corona measurements: Corona performances of all equipment after charging were assessed for their effectiveness in limiting corona. Fig. 7 shows the corona performance of 1200kV corona ring installed on transformer bushing. Issue of high corona was faced with some of the line connectors due to surface distortion and same were re-installed after repair/smoothening of surfaces as a part of corrective action.

Figure 7: Corona image taken by handheld corona camera near 1200kV bushing

Thermo-vision scanning: Thermo-vision scanning of equipment was carried out under no-load condition to detect any abnormalities in the operating temperature or hot spots in the equipment. No abnormalities were observed during the test except in one of the line connectors and it was attributed to loose connection, which was resolved. Fig.8 below shows thermo-vision scanning images taken for transformer, bushing of 1200kV CB and 1200kV surge arrestor. Once power flow is established after works in phase-II and interconnection activities are completed from

Fig. 5:Recorded1200kVphasevoltageandcurrentwaveforms

Fig. 6:Recordedinrushcurrentwaveformsduringatypicalchargingevent

(c)Corona Measurements:Coronaperformancesofallequipment after chargingwereassessed for theireffectiveness in limiting corona.Fig. 7 shows thecoronaperformanceof1200kVcoronaringinstalledontransformerbushing.Issueofhighcoronawasfacedwithsomeofthelineconnectorsduetosurfacedistortionandsamewere re-installedafter repair/smoothening of surfaces as a part of correctiveaction.

(d)Thermo-vision Scanning:Thermo-visionscanningofequipmentwascarriedoutunderno-loadconditiontodetectanyabnormalitiesintheoperatingtemperatureorhotspotsintheequipment.

Fig. 7:Coronaimagetakenbyhandheldcoronacameranear1200kVbushing

19



Noabnormalitieswereobservedduringthetestexceptinoneofthelineconnectorsanditwasattributedtolooseconnection,whichwasresolved.Fig.8showsthermo-visionscanningimagestakenfortransformer,bushingof1200kVCBand1200kVsurgearrestor.

(e)Assessment of Electrostatic Induction:Theelectricfieldstrengthwasmeasuredaroundtheperipheryofthemajorequipmentin1200kVbayat1m&1.8mabove the ground level and 1m away from theequipment and measured values were foundgenerallyinorder(<4kV/m).

4. FAuLT EXPERIENCED IN 1200KV NTS FACILITy AND ITS INVESTIGATION

Progressivelyequipmentweredeveloped,installedandcharged inNTS facility. The1200kV test stationwasre-charged after the installation of following 1200kVequipment:

Oncepowerflowisestablishedafterworksinphase-II and interconnectionactivities are completed from400kVside,thermo-visionscanningoftheequipmentwill be carried out again which will be helpful invalidatingtheirthermaldesign.

Fig. 8(a):Thermographimageofbushingturretoftransformer

Fig. 8(b):Thermographimageofthetransformerbody

Fig. 8(c):Thermographimageof1200kVCB Fig. 8(d):Thermographimageof850kVsurgearrestor

5

400kV side, thermo-vision scanning of the equipment will be carried out again which will be helpful in validating their thermal design.

Figure 8(a): Thermograph image of bushing turret of transformer

Figure 8(b): Thermograph image of the transformer body

Figure 8(c): Thermograph image of 1200kV CB Figure 8(d): Thermograph image of 850kV surge arrestor

Assessment of electrostatic induction: The electric field strength was measured around the periphery of the major equipment in 1200kV bay at 1 m&1.8m above the ground level and 1m away from the equipment and measured values were found generally in order (< 4kV/m).

4. Fault Experienced in 1200kV NTS Facility and its Investigation:

Progressively equipment were developed, installed and charged in NTS facility. The 1200kV test station was re-charged after the installation of following 1200kV equipment:

a) Circuit Breakers in R & Y-phase b) One three phase isolator c) Single phase isolator installed in R-phase

After charging from 400kV side, R-phase of NTS phase-I was tripped by instantaneous over-current protection and a flashover was observed outside the tank (Fig. 10) between transformer tank cover and main tank body. General technical parameters of 400/1200kV transformer are given in Table 3.

5

400kV side, thermo-vision scanning of the equipment will be carried out again which will be helpful in validating their thermal design.

Figure 8(a): Thermograph image of bushing turret of transformer

Figure 8(b): Thermograph image of the transformer body

Figure 8(c): Thermograph image of 1200kV CB Figure 8(d): Thermograph image of 850kV surge arrestor

Assessment of electrostatic induction: The electric field strength was measured around the periphery of the major equipment in 1200kV bay at 1 m&1.8m above the ground level and 1m away from the equipment and measured values were found generally in order (< 4kV/m).

4. Fault Experienced in 1200kV NTS Facility and its Investigation:

Progressively equipment were developed, installed and charged in NTS facility. The 1200kV test station was re-charged after the installation of following 1200kV equipment:

a) Circuit Breakers in R & Y-phase b) One three phase isolator c) Single phase isolator installed in R-phase

After charging from 400kV side, R-phase of NTS phase-I was tripped by instantaneous over-current protection and a flashover was observed outside the tank (Fig. 10) between transformer tank cover and main tank body. General technical parameters of 400/1200kV transformer are given in Table 3.

(a)CircuitBreakersinR&Y-phase

(b)Onethreephaseisolator

(c)SinglephaseisolatorinstalledinR-phase

Afterchargingfrom400kVside,R-phaseofNTSphase-Iwas tripped by instantaneous over-current protectionandaflashoverwasobservedoutsidethetank(Fig.10)between transformer tank coverandmain tankbody.Generaltechnicalparametersof400/1200kVtransformeraregiveninTable3.



Table 3:Generaltechnicalparametersof400/1200kVTransformer

Parameter Specification

RatedPower 333/333/111MVA,singlephase

VoltageRatio 1150/√3/400/√3/33kV

Ratedfrequency 50Hz

Connection Ynaod11

%Imedance HV-IV18%HV-LV40%IV-LV20%

WindingLIWV 2250/1300/325kVp

WindingSIWV 1800/1050/325kVp

BushingLIWV 2550/1425/325/95kVp

BushingSIWV 1950/1050/325/5kVp

Colingtype ODAForOFAF

Coolingequipment 4*33%UnitOFAFcoolers

TempRise 45degC:Wdg40degC:TopOil

Fig. 9:Schematicdiagramof1200kVNationalTestStationindicatinglocationoffault

Asflashoverwasseenonoutersideoftransformertankinordertoensurethehealthinessoftransformer,seriesoftestswerecarriedoutontransformerandsamearelistedbelow:

• DGA,BDV,PPM,Tanδetc.oftransformeroilandbushingoil

• Capacitance&Tanδmeasurementfromwindingstotankandbetweenwindings

• Capacitance&Tanδmeasurementofbushings

• Insulation resistance measurement of CC toFrame

• Insulation ResistanceMeasurement of bushingCTs

• ContinuitytestonbushingCT(IV/HV)

• WindingresistanceofIVBushingCT

• Magnetizingcurrenttest

• Transformerwindingresistancemeasurement

• Earthpitresistancemeasurement

• SFRAmeasurementsofTransformer

All the test resultswere found to be in linewith pre-commissioning test results exceptSFRA results andmagnetizingcurrent.Magnetizingcurrentoftransformerincreasedslightlybutitwasnotsignificant.SFRAresultswereshowingaminorshift in lowfrequencyrangeasshowninFig.11.Shortingstripsconnectingtankcoverandmaintankbodywerefoundtobe intact;howeverasasafetymeasureshortingstripswerereplacedaftercleaningofcontactsurface.

6

Figure 9: Schematic diagram of 1200kV National Test Station indicating location of fault

Parameter Specification Rated Power : 333/333/111MVA,

single phase Voltage Ratio : 1150/3 / 400/3

/33kV Rated frequency : 50Hz Connection : Ynaod11 % Im edance :

: :

HV-IV 18% HV-LV 40% IV-LV 20%

Winding LIWV : 2250/1300/325kVp Winding SIWV : 1800/1050/325kVp Bushing LIWV : 2550/1425/325/95kVp Bushing SIWV : 1950/1050/325/ 5kV

p C oling type : ODAF or OFAF Cooling equipment

: 4*33% Unit OFAF coolers

Temp Rise : 45degC:Wdg 40degC:Top Oil

Figure 10: Snapshot of the flashover seen on the R-phase transformer

Table 3: General technical parameters of 400/1200kV Transformer

As flashover was seen on outer side of transformer tank in order to ensure the healthiness of transformer, series of tests were carried out on transformer and same are listed below:

• DGA, BDV, PPM, Tan etc. of transformer oil and bushing oil • Capacitance & Tan measurement from windings to tank and between windings • Capacitance & Tan measurement of bushings • Insulation resistance measurement of CC to Frame • Insulation Resistance Measurement of bushing CTs • Continuity test on bushing CT (IV/HV)

400kV bus

1200kV side1200/400kV Transformer bank

400kV lines

Presently charged 1200kV Circuit Breaker

400kV Circuit Breaker

6

Figure 9: Schematic diagram of 1200kV National Test Station indicating location of fault

Parameter Specification Rated Power : 333/333/111MVA,

single phase Voltage Ratio : 1150/3 / 400/3

/33kV Rated frequency : 50Hz Connection : Ynaod11 % Im edance :

: :

HV-IV 18% HV-LV 40% IV-LV 20%

Winding LIWV : 2250/1300/325kVp Winding SIWV : 1800/1050/325kVp Bushing LIWV : 2550/1425/325/95kVp Bushing SIWV : 1950/1050/325/ 5kV

p C oling type : ODAF or OFAF Cooling equipment

: 4*33% Unit OFAF coolers

Temp Rise : 45degC:Wdg 40degC:Top Oil

Figure 10: Snapshot of the flashover seen on the R-phase transformer

Table 3: General technical parameters of 400/1200kV Transformer

As flashover was seen on outer side of transformer tank in order to ensure the healthiness of transformer, series of tests were carried out on transformer and same are listed below:

• DGA, BDV, PPM, Tan etc. of transformer oil and bushing oil • Capacitance & Tan measurement from windings to tank and between windings • Capacitance & Tan measurement of bushings • Insulation resistance measurement of CC to Frame • Insulation Resistance Measurement of bushing CTs • Continuity test on bushing CT (IV/HV)

400kV bus

1200kV side1200/400kV Transformer bank

400kV lines

Presently charged 1200kV Circuit Breaker

400kV Circuit Breaker

Fig. 10 :SnapshotoftheflashoverseenontheRphasetransformer

21



Fig. 11:SFRAof1200kVtransformerwindingshowingshiftinLowfrequencyrange&snapshotofCIGRE

TB:342showingeffectofmagnetizedcoreonSFRAresults

7

• Winding resistance of IV Bushing CT • Magnetizing current test • Transformer winding resistance measurement • Earth pit resistance measurement

• SFRA measurements of Transformer

All the test results were found to be in line with pre-commissioning test results except SFRA results and magnetizing current. Magnetizing current of transformer increased slightly but it was not significant. SFRA results were showing a minor shift in low frequency range as shown in Fig. 11. Shorting strips connecting tank cover and main tank body were found to be intact; however as a safety measure shorting strips were replaced after cleaning of contact surface.

Figure 11: SFRA of 1200kV transformer winding showing shift in Low frequency range & snapshot of CIGRE TB:342showing effect of magnetized core on SFRA results

Following were considered as the probable causes of flashover seen on outer side of transformer tank before detailed investigation:

• Loosening of shorting strips between tank cover and main tank • Change in earth resistance between the earth pit and neutral earthing terminal • Improper earthing of transformer tank, cooler bank and firefighting pedestals • Saturation of transformer core due to over voltage • Presence of winding earth Fault • Failure of one of the bushing’s

• Failure of bushing CTs

5. Observations from Disturbance Recorder (DR) Waveforms

Disturbance recorder waveforms were studied in detail, to get an overall idea of fault scenario. Observations made from the disturbance recorder waveforms are as under: 1. Inrush current drawn by R-phase (IV_SIDE_IL123 (R, Y and B-phase) in Fig. 12) transformer for

first few cycles was of the same order as drawn by Y-phase, B-phase and during previous charging events. Also it was observed that inrush current drawn by transformer were decaying in first few

7

• Winding resistance of IV Bushing CT • Magnetizing current test • Transformer winding resistance measurement • Earth pit resistance measurement

• SFRA measurements of Transformer

All the test results were found to be in line with pre-commissioning test results except SFRA results and magnetizing current. Magnetizing current of transformer increased slightly but it was not significant. SFRA results were showing a minor shift in low frequency range as shown in Fig. 11. Shorting strips connecting tank cover and main tank body were found to be intact; however as a safety measure shorting strips were replaced after cleaning of contact surface.

Figure 11: SFRA of 1200kV transformer winding showing shift in Low frequency range & snapshot of CIGRE TB:342showing effect of magnetized core on SFRA results

Following were considered as the probable causes of flashover seen on outer side of transformer tank before detailed investigation:

• Loosening of shorting strips between tank cover and main tank • Change in earth resistance between the earth pit and neutral earthing terminal • Improper earthing of transformer tank, cooler bank and firefighting pedestals • Saturation of transformer core due to over voltage • Presence of winding earth Fault • Failure of one of the bushing’s

• Failure of bushing CTs

5. Observations from Disturbance Recorder (DR) Waveforms

Disturbance recorder waveforms were studied in detail, to get an overall idea of fault scenario. Observations made from the disturbance recorder waveforms are as under: 1. Inrush current drawn by R-phase (IV_SIDE_IL123 (R, Y and B-phase) in Fig. 12) transformer for

first few cycles was of the same order as drawn by Y-phase, B-phase and during previous charging events. Also it was observed that inrush current drawn by transformer were decaying in first few

8

cycles before fault occurred. Hence it was concluded that transformer core was not saturated prior to charging.

Figure 12: Disturbance recorder waveforms of 400 kV side bay CT currents

2. Before occurrence of fault, 400kV side R-phase voltage (HV_PT_UL1_3MS/kV in Fig.13) was quite stable and was within acceptable limits. There was no over-voltage situation which can saturate transformer core. Further, it was found (Fig.13) that during fault period, R-phase voltage and current were in phase and a DC component was present in R-phase current.

Figure 13: Recorded waveforms of 400 kV side voltage and currents.

Followingwereconsideredas theprobablecausesofflashoverseenonoutersideoftransformertankbeforedetailedinvestigation:

• Looseningofshortingstripsbetweentankcoverandmaintank

• Change inearth resistancebetween theearthpitandneutralearthingterminal

• Improperearthingoftransformertank,coolerbankandfirefightingpedestals

• Saturationoftransformercoreduetoovervoltage• PresenceofwindingearthFault• Failureofoneofthebushing’s• FailureofbushingCTs

5. OBSERVATIONS FROM DISTuRBANCE RECORDER (DR) wAVEFORMS

Disturbancerecorderwaveformswerestudiedindetail,to get anoverall ideaof fault scenario.Observationsmadefromthedisturbancerecorderwaveformsareasunder:1. InrushcurrentdrawnbyR-phase(IV_SIDE_IL123(R,

YandB-phase)inFig.12)transformerforfirstfewcycleswasofthesameorderasdrawnbyY-phase,B-phaseandduringpreviouschargingevents.Alsoitwasobservedthatinrushcurrentdrawnbytransformerweredecayinginfirstfewcyclesbeforefaultoccurred.Henceitwasconcludedthattransformercorewasnotsaturatedpriortocharging.

2. Before occurrence of fault, 400kV sideR-phasevoltage(HV_PT_UL1_3MS/kVinFig.13)wasquitestable andwaswithin acceptable limits. Therewasnoover-voltage situationwhich can saturatetransformercore.Further,itwasfound(Fig.13)thatduring fault period,R-phase voltage and currentwereinphaseandaDCcomponentwaspresentinR-phasecurrent.

Fig.12:Disturbancerecorderwaveformsof400kVsidebayCTcurrents



zero and hencewinding to earth fault was notpresent.

3. CurrentsrecordedbyREFprotection(REF_IL123forR,YandB-phaseinFig.14)relayswerealmost

9

3. Currents recorded by REF protection (REF_IL123 for R, Y and B-phase in Fig.14) relays were almost zero and hence winding to earth fault was not present.

Figure 14: Recorded waveforms of REF protection of transformer, stand-by earth Fault relay and neutral current measured on 400kV side

4. R-phase standby earth fault CT current (STANDBY_EF_IN/kA Fig.14) was found to be less than that of 400kV side neutral current which indicated a possibility of line to earth Fault on 1200kV side (outside the R-phase transformer) and hence there was a presence of DC bias in R-phase current.

6. Simulation Results and Analysis

Based on the observation made from the disturbance recorder waveforms above, it was decided to carry out detailed simulation study for single phase line to ground fault on 1200kV side. In order to simulate the L-G fault a model of 1200kV NTS was prepared in PSCAD software (Fig. 15) and same was simulated. 1200kV circuit breakers were provided in R and Y-phase in the simulation model, as it was in actual condition.

CVT has been modelled with an equivalent capacitance value since parameters such as burden, compensation inductances, and losses were not available. Charging of the NTS is governed by 400 kV circuit breakers and same has been used in the simulation model and their operation was defined in thetime logic.

Neutral current measured on 400kV side

8

cycles before fault occurred. Hence it was concluded that transformer core was not saturated prior to charging.

Figure 12: Disturbance recorder waveforms of 400 kV side bay CT currents

2. Before occurrence of fault, 400kV side R-phase voltage (HV_PT_UL1_3MS/kV in Fig.13) was quite stable and was within acceptable limits. There was no over-voltage situation which can saturate transformer core. Further, it was found (Fig.13) that during fault period, R-phase voltage and current were in phase and a DC component was present in R-phase current.

Figure 13: Recorded waveforms of 400 kV side voltage and currents. Fig. 13:Recordedwaveformsof400kVsidevoltageandcurrents

Fig. 14:RecordedwaveformsofREFprotectionoftransformer,stand-byearthFaultrelayandneutralcurrentmeasuredon400kVside

4. R-phasestandbyearthfaultCTcurrent(STANDBY_EF_IN/kAFig.14)was found to be less than thatof 400kV side neutral currentwhich indicated apossibility of line to earth Fault on 1200kV side(outsidetheR-phasetransformer)andhencetherewasapresenceofDCbiasinR-phasecurrent.

6. SIMuLATION RESuLTS AND ANALySISBasedon theobservationmade from thedisturbancerecorderwaveformsabove,itwasdecidedtocarryoutdetailedsimulationstudyforsinglephaselinetogroundfault on 1200kV side. In order to simulate the L-Gfaultamodelof1200kVNTSwaspreparedinPSCAD

23



software (Fig. 15) and samewas simulated. 1200kVcircuitbreakerswereprovidedinRandY-phaseinthesimulationmodel,asitwasinactualcondition.

CVThasbeenmodelledwithanequivalentcapacitancevaluesinceparameterssuchasburden,compensation

inductances,and losseswerenotavailable.ChargingoftheNTSisgovernedby400kVcircuitbreakersandsamehasbeenusedinthesimulationmodelandtheiroperationwasdefinedinthetimelogic.

10

Figure 15: 1200kV NTS Circuit model to simulate and analyze the Fault condition

A condition similar to the single phase line-to-ground fault was created in the model using the circuit breaker BRK6 in Fig. 15, the instant of the fault was chosen to approximately to match with the actualmeasurement. The switching sequence of the breakers was chosen similar to the actual charging sequence at the site.

Fig. 16: 400kV side R-phase current measured and simulated waveform

It can be seen from Fig.16 that when line is charged under normal condition, charging currents are drawn by all three single-phase transformers. However, when single phase line-to-earth fault is created

Acondition similar to the single phase line-to-groundfaultwascreatedinthemodelusingthecircuitbreakerBRK6inFig.15,theinstantofthefaultwaschosento

Fig. 15 :1200kVNTSCircuitmodeltosimulateandanalyzetheFaultcondition

approximately tomatchwith theactualmeasurement.The switching sequenceof thebreakerswas chosensimilartotheactualchargingsequenceatthesite.

Fig. 16:400kVsideR-phasecurrentmeasuredandsimulatedwaveform

10

Figure 15: 1200kV NTS Circuit model to simulate and analyze the Fault condition

A condition similar to the single phase line-to-ground fault was created in the model using the circuit breaker BRK6 in Fig. 15, the instant of the fault was chosen to approximately to match with the actualmeasurement. The switching sequence of the breakers was chosen similar to the actual charging sequence at the site.

Fig. 16: 400kV side R-phase current measured and simulated waveform

It can be seen from Fig.16 that when line is charged under normal condition, charging currents are drawn by all three single-phase transformers. However, when single phase line-to-earth fault is created



It canbeseen fromFig.16 thatwhen line is chargedunder normal condition, charging currents are drawnbyallthreesingle-phasetransformers.However,when

400kVsideR-phasevoltageasseeninFig.18reducesduringthefaultconditionandissimilartothatobservedintheactualrecordedwaveformsatthesite(thepeakpre-

Fig. 18:400kV(MV-Mediumvoltage)sideR-phasevoltageundermeasuredandsimulation

11

in the R-phase, high fault current flows in R-phase, and while other two phases still carry charging currents of the transformers (Fig. 17).

Figure 17: 400kV side current Y and B-phase currents – Simulation

400kV side R-phase voltage as seen in Fig. 18 reduces during the fault condition and is similar to that observed in the actual recorded waveforms at the site (the peak pre-fault voltage = (400/ ) = 326.6 kV). This significant voltage drop is due to very high fault current flowing through the line.

Figure 18: 400kV (MV-Medium voltage) side R-phase voltage under measured and simulation

The R-phase 1200kV side voltage reduces significantly because of the fault condition as shown in Fig.19, which is similar to that recorded during the measurements.

Figure 19: 1200kV side voltage comparison – measured and simulation

The agreement of simulation results with the actual recorded waveforms indicated a strong possibility of a single line to earth fault in the R-phase and its presence was confirmed during further investigation of R-phase circuit breaker. Hence it was concluded that single line to earth fault occurred

11








11








TheR-phase1200kVsidevoltagereducessignificantlybecauseofthefaultconditionasshowninFig.19,which

singlephaseline-to-earthfaultiscreatedintheR-phase,highfaultcurrentflowsinR-phase,andwhileothertwophasesstillcarrychargingcurrentsofthetransformers(Fig.17).

Fig. 17 :400kVsidecurrentYandB-phasecurrents–Simulation

faultvoltage=(400/√3)√2=326.6kV).Thissignificantvoltagedrop is due to very high fault current flowingthroughtheline.

issimilartothatrecordedduringthemeasurements.

Fig. 19:1200kVsidevoltagecomparison–measuredandsimulation

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savE onE unIt a daykEEP PowER Cut away

The agreement of simulation resultswith the actualrecordedwaveformsindicatedastrongpossibilityofasinglelinetoearthfaultintheR-phaseanditspresencewasconfirmedduring further investigationofR-phasecircuitbreaker.Henceitwasconcludedthatsinglelinetoearthfaultoccurredafter50-60msofchargingthelineanditwasapermanentlinetoearthfault.Later,1200kVNationalTestStation(NTS)wassuccessfullychargedafterby-passingR-phasecircuitbreakerinthecircuit.

Phenomenon of flashover between the tank coverandmaintankof transformerwasduetoasignificantvoltagedifferencebetweenthetwopartsduetohighercontact resistanceof theshorting linksbetween them(forexampledue topaint).Thebottomtankpartmayget raised to a highpotential valuedue to the singlephaseline-to-earthfaultcurrentflowingthroughtheearthcircuit,whichcan raise thebottom tankpotential toafew thousandsofvolts (taking theearth resistanceof0.5ohms,thevoltagelevelcanbeapproximately0.5×peakvalueofthefaultcurrent=0.5×12kA=6kV).Thisvoltagemaybeenoughtocauseamomentaryflashoverbetweenthetwotankpartsexternally.

Minor shift in the SFRA of transformer indicates apossibilityoflocalsaturationoftransformercorewhichnormallyoccurswhen transformer feeds faultcurrent.Localsaturationofcoremaycausetheleakagefluxtolinkwithtankandwouldresult intoinducedvoltageintankcover.Iftheinducedvoltageissufficientlyhighandiftotalcurrentdischargingcapabilityofshortinglinksisnot sufficient then thisvoltagemaygetdischarged toearthedtankviaair(flashover).Thispossibilitywillbefurtherstudiedindetail.

7. CONCLuSIONThe establishment of 1200kVNational Test Station,Binahashelpedindevelopmentandindigenizationof

UHVAC equipment in India. The experience gainedfrom establishment and operation of 1200kV NTSfacilityisverycrucialforPOWERGRIDindesigningandfinalizingtechnicalspecificationofUHVACequipment.POWERGRIDhasuseditsexperienceindesigningofWardha-Aurangabad transmission line in India,whichhasbeendesignedfor1200kVvoltagelevelconsideringfuture power requirements, though the line will bechargedinitiallyat400kVvoltagelevelandsubsequentlywill be upgraded to 1200kV after completion of fieldstudiesat1200kVNTS.

Theestablishmentandoperationof1200kVNTSfacilityhasalsohelpedmanufacturerstovalidatedesignoftheirequipmentandevenoptimizethem,bywayofreceivingcontinuous feedback fromPOWERGRID regardingperformance of equipment in test facility. Itwill alsohelpthemtobebecomegloballeadersindevelopmentofUHVACproducts.ExperiencegainedfromthisfaultincidentinNTSfacilityhasgivenabetterinsighttothetransformer&circuitbreakermanufacturersregardingtheirdesignaspectsandsamewillbetakencareoffinfuturedesignsoftheirequipment.

BIBLIOGRAPhy1. L.YaoB. Li, E. Zaimi,K.Uehara,Y.Shirasaka,

B. N. De. Bhowmick “The situation of UHVACtransmissionsystem& its standarization”CIGRE/IEC International symposiumonDevelopment ofelectricityinfrastructureinSub-SaharanAfrica,SouthAfrica2015

2. Dr.S.K.Agrawal,D.P.Tamoli,B.N.De.Bhowmick,B.N.V.R.C.Sureshkumar,S.B.Rao&AkhilSundaran“1200kVNationalTestStation:TakingIndianpowersystemtonextorbit”,CIGREInternationalcolloquiumonUltraHighVoltage,NewDelhi2013


EnsuRInG hIGh QualIty InsulatIon systEm of laRGE motoRs – dEsIGn & tEstInG

REQuIREmEnts

A.K. Gupta, D.K. Chaturvedi and P.K. BasuNTPC Limited

ABSTRACT

In recent past, several high voltage motor winding failures occurred within one year of commissioning in two of NTPC projects. They include bearing failures, winding cable connection failure at termination and winding insulation failures in overhang region. During review it was found that some of the important requirements, which ensures healthy machine insulation system have not been taken care during manufacturing process. The commonly observed deficiencies in manufacturing process of end winding are:

• Poorly done brazing at bus connection.

• Poor workmanship causing uneven air clearances.

• Selection of inadequate cable and lug size, leading to heating and subsequent failure.

• Pre-VPI activities done in uncontrolled (non-air conditioned) environment.

This paper discuss the type of failure occurred, analyses the root cause and mitigation measures. It gives insight to best practices being adopted in machine manufacturing and testing to ensure high quality of insulation system.

The importance of minimum clearance between two adjacent coils has been discussed in the paper. The paper also suggests the minimum clearances to be maintain between insulation surface of two adjacent coils of same phase and different phases. It emphasize on use of software based advance coil taping and coil spreader machines instead of old conventional practices to ensure shape of coil as per design. The use of automated coil spreading and automatic taping machine avoids presence of wrinkles, knots and lashes, maintain adequate clearances in overhang, a very important aspect to ensure quality of capsule. The paper describes the effect of taping method on machine life. It discusses the advantages of machine taping over manual taping.

It also covers other critical design requirement in high voltage motor overhang insulation. It suggests criteria for selection of winding cable connection, termination arrangement and best practice for coil brazed joints. Some of very important tests namely Corona Imaging Test, Monitoring of cable lug temperature at termination using RTD, partial discharge test have been suggested to be conducted as `ROUTINE TESTS’. The use of infrared camera as routine test to check healthiness of winding lead termination has been suggested.

CAuSES OF FAILuREOverhangpart ofwindingexperienceshigh thermalandmechanicalstress.Ithasbeenseenduringtestingof largewater cooledmachine, the temperature ofRTD in slot portion is almost 10-12 deg. C lowerthanthetemperatureexistsinoverhangportion.Themechanicalforcesarealsohigherinendwinding.The

currentchangesdirectionatthecoilendportion,whichispoorlysupportedascomparedtoslotportion.

Asregardstoelectricalstress,theslotportionofcoilisprovidedwithsemiconductivecoatingwhichkeepstheinsulationsurfaceatzeropotential.Asthecoilcomesoutoftheslotportion,somelengthisprovidedwithtransitiontape for coronaprotection.The transition tapeavoids

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Ensuring High Quality Insulation System of Large Motors – Design & Testing Requirements

[email protected]

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Fig.1: PRESENCE OF KNOTS, LASHES AND LOWER AIR GAP BETWEEN PHASES Some of these failures are bearing failure caused by solidification of grease due to long storage of machine and several other failures were attributed to poorly done insulation during manufacturing (see Figure-2).

Fig.2 LOW CLEARANCE BETWEEN ADJACENT PHASE BUS CONNECTION

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Fig.1: PRESENCE OF KNOTS, LASHES AND LOWER AIR GAP BETWEEN PHASES Some of these failures are bearing failure caused by solidification of grease due to long storage of machine and several other failures were attributed to poorly done insulation during manufacturing (see Figure-2).

Fig.2 LOW CLEARANCE BETWEEN ADJACENT PHASE BUS CONNECTION

Fig. 1:PresenceofKnots,LashesandLowerAirGapbetweenPhases

Someof these failuresarebearing failure causedbysolidificationofgreaseduetolongstorageofmachineandseveralotherfailureswereattributedtopoorlydoneinsulationduringmanufacturing(Figure2).

thesurfacetrackingonthecoilasthepotentialbeyondthiszoneinoverhangportionisveryhighwithrespecttoground.Thispotentialatinsulationsurfaceduringhighvoltageisalmost80%oftheappliedvoltage.Whereas,during running ofmachine the potential in overhangportionofcoilvaries,andcanbeupto85%ofratedph-phvoltageatthecoilconnectiontophaseterminals.

Thereforewecansaythatthemachinecoilissubjectedtoveryhighthermal,mechanicalandelectricalstressesintheoverhangportionofwinding.

Ithasbeenseenthatseveral large6.6kVand11kVmachinesarebeingmanufacturedwithmanuallytappedinsulation,where knots, lashes and uneven air gapsbetweenadjacentphasescanbeseenatseveralplaces(Figure1).Thesemachinescanrunforfewyears,buthavehighwindinginsulationfailurerate.Ithasbeenseenthatinaspanoftwoyears,morethan20HighVoltagemotorsfailedattwoofNTPCprojects.

Fig. 2:LowClearancebetweenAdjacentPhaseBusConnection

Theairgapbetweentheadjacentphasecoilsandphasebus connectionwas observed varying from 1.0mmto14.0mm in11kVmotors.Theuneven tapingandpresenceofwrinklesininsulationcanbeseenalmosteverywhere(Figure3).

Suchmachineshavehighpartialdischargeactivityandpronetofailureon`LinetoGround’faults(Fig.4).

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4

The air gap between the adjacent phase coils and phase bus connection was observed varying from 1.0 mm to 14.0 mm in 11kV motors. The uneven taping and presence of wrinkles in insulation can be seen almost everywhere (see figure 3).

Fig.3 WRINKLE CAN BE SEEN IN OVERHANG CONNECTIONS Such machines have high partial discharge activity and prone to failure on `Line to Ground’ faults (Fig. 4).

Fig.4. LINE TO GROUND FAILURE IN OVERHANG Several high voltage machine manufacturers, finds dimensional control in motor winding overhang very difficult.

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The air gap between the adjacent phase coils and phase bus connection was observed varying from 1.0 mm to 14.0 mm in 11kV motors. The uneven taping and presence of wrinkles in insulation can be seen almost everywhere (see figure 3).

Fig.3 WRINKLE CAN BE SEEN IN OVERHANG CONNECTIONS Such machines have high partial discharge activity and prone to failure on `Line to Ground’ faults (Fig. 4).

Fig.4. LINE TO GROUND FAILURE IN OVERHANG Several high voltage machine manufacturers, finds dimensional control in motor winding overhang very difficult.

Fig. 3 :WrinklecanbeSeeninOverhangConnections Fig. 4:LinetoGroundFailureinOverhang



CoilSpreaderMachine

RemedyThedimensionalcontrol canbeachievedbyuseofcoilspreadermachine.Thismachinecangivethecoils

Fig. 6 :PoorlyDoneCableTerminationArrangement

Several high voltagemachinemanufacturers, findsdimensional control inmotorwinding overhang verydifficult.

desiredshapewithhighdimensionalandgeometricalaccuracyasperpre-loadedsoftware.CoilSpreadersaredesignedtoformcoilsfromloopspriortopressing.Theyaretypicallyusedtoformdiamondcoilsofhighquality.

Low Clearance at Bus Connection OverlapIthasbeenseeninsomelarge11kVmotorsthatbrazingwasdoneatbusconnectionwithtwoflatsoverlappingandthereforeofferingverylowclearancebetweenbus-connection of twodifferent phases (Figure 2). Thesegapsareunevenduetopoorworkmanship.

RemedyEspeciallydesignedT-connectorscanbeusedtoensureadequateclearancesatsuchlocations.

Failure at Cable TerminationTheselectionofcableandinadequatelugsizecausedheatingandsubsequentfailureatconnectionofwindingleadtotheterminationarrangement.(Fig.6)

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Coil Spreader Machine Remedy:

The dimensional control can be achieved by use of coil spreader machine. This machine can give the coils desired shape with high dimensional and geometrical accuracy as per pre-loaded software. Coil Spreaders are designed to form coils from loops prior to pressing. They are typically used to form diamond coils of high quality.

low Clearance at bus Connection overlap

It has been seen in some large 11kV motors that brazing was done at bus connection with two flats overlapping and therefore offering very low clearance between bus-connection of two different phases (Figure-2). These gaps are uneven due to poor workman ship. Remedy:

Especially designed T-connectors can be used to ensure adequate clearances at such locations.

Infewcasesitisfoundthatcross-sectionoflugatitsneckisverylowascomparedtothewindingphaseconductorcrosssection.Thisaddsuphighresistanceandheatingnearthecabletermination.

RemedyThesectionofcablehastobecompatibletothecrosssection of the conductor.As the forces duringmotorstatingisveryhighbetweentwoadjacentphases

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failure at Cable termination

The selection of cable and inadequate lug size caused heating and subsequent failure at connection of winding lead to the termination arrangement. (See fig. 6)

Fig.6. POORLY DONE CABLE TERMINATION ARRANGEMENT In few cases it is found that cross-section of lug at its neck is very low as compared to the winding phase conductor cross section. This adds up high resistance and heating near the cable termination.

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Ensuring High Quality Insulation System of Large Motors – Design & Testing Requirements

FaI2 and Fa1/d,

Where ‘I’ is thestartingcurrentand ‘d’ is thespacingbetweentwoadjacentconductors.Thecableconnectionto the terminationhas tobeproperlydressedupandsupportedtotakecareofhighforcesduringstartingofthemotor.

Measurement of lead connection temperature atterminal shouldbemademandatorybyplacingRTD/thermocouple. Use of infrared camera to checkhealthinessofwindingleadterminationduringheatruntestcanalsobeconsideredasroutinetest.

Avoiding wrinkles and Lashes in TappingThewrinklesandlashesasseeninFig.1andFig.3canbeavoidedbyuseofautomatictappingmachine.Ithasbeenexperimentedthatinsulationdielectricstrengthinautomatictappingisveryhighascomparedtothemanualtapping.Thetimetoinsulationbreakdownofacoilfoundtobeaverage50-100timestothatofmanuallytappedcoil,whenpowerfrequencyhighvoltageisappliedforlongduration.

SuGGESTED STEPS DuRING VPI CAPSuLE MANu-FACTuRING TO ENSuRE hIGh quALITy IN wINDING OVERhANG:1. Thecoilmanufacturingofhighvoltagemotorshave

tobedoneincontrolledenvironmentpreferablyairconditionedtoavoidanycontaminationdepositonthe coils duringmanufacturing.Themoistureandtemperaturecontrolisalsoveryimportanttohavegoodqualitywinding.

2. Storage of insulationmaterial shall be at lowtemperature (e.g. 5 deg. C to 15 deg.) as permanufacturer’s recommendation. The coi lmanufacturing,assemblyandVPIprocessshallbecompletedwithin30daysofbeingtakenoutofcoldstorage.

3. Theinsulationtapingonbar/coilhastobedoneusingsoftwarecontrolledinsulationtapingmachine,soastoensurelongevityandhighresistancetoelectricalstress.

4. Thecoilshouldbeformedsoastojustfitintheslottoavoidanycoronadischargeduringitslifespan.Theshapeconsistencyhastobeensuredbyuseof special coil spreadermachinehaving softwarecontrolledoperation.Theshapeofeachcoilhastobeensuredasperthedesignrequirement.

5. Priortowindingassemblyshapeofcoilhastobechecked.Itshouldfitintheslotwithoutputtinganyimpactontheinsulation.

6. ThewindingconnectionsaretobebrazedandshouldusestandardT-connectors,whereveroverlappingresultsinlowclearance.

7. TheVPI process shall be done as per standardprocedureandshallbeconsideredcompleteasandwhenthe tandeltavalueofwindingduringcuringprocessreachestospecifiedvalue.

SuGGESTED TESTS TO ENSuRE OVERALL wIND-ING quALITyThe overall quality of high voltagemotor capsule isensuredbyconductingfollowingtests:

(a)Tan delta and tip us test – at factory aswell astrendingeveryyearatinstallation.

(b)Corona Imaging test at 115% rated voltage afterassembly.

(c)PartialDischargeMeasurementafterassemblyaswellastrendingeveryyear.

TAN DELTA TIP uP TESTThetandeltaandcapacitancetipuptestisoneofthebestteststoestablishthehealthinessofwindingoverallinsulation system. Thewinding is stressed to ratedvoltage level and capacitance ismeasured at 20%and80%of ratedvoltage(refer IEEE286). Ideally thewindingcapacitanceshouldnotchange.Theresultsofthemanufacturingstagearekeptasreferenceandusedwhileconductingthetestatsiteaftermachinecompletedfew(3-5)yearsofoperation.Subsequentlyeveryyearthetesthastobeconducted.Thetrendingoftipupshouldnotshowadeviationofmorethan1percentperyear.Theconductionofothertwotestsmentionedabovecanfurtheraugmenttheresult.

CORONA IMAGING TESTThe corona imaging test is done at 115% of ratedvoltage.ThistestvoltageisappliedtothewindingandcoronadischargesarecapturedusingUVcamera.TheUVcameraresultscanbecomparedwiththeblackouttest,wherethePDactivityisseenbynakedeyewhenwinding is applied115%of rated voltage.The test isconducted for 15minutes, to give adequate time forvisualcheck.Novisualdischargesshallbeseeninthewindingduringthetest.TheIEEE1799-2012elaboratesthetestmethod.

Different remedialmeasures havebeendiscussed inIEEE1799 standard to ensure corona free overhangwinding. The corona free endwinding ensures highqualityofinsulationandlongevityoftheequipment.

OFFLINE PARTIAL DISChARGE TESTThemeasurementofofflinepartialdischargesateverymachine overhaul and trendingwith earlier resultsindicates the overall condition ofmachine insulationsystem.AnyincreasingtrendofPDindicatesdeteriorationofinsulationsystemquality.



CLEARANCES BETwEEN ADJACENT PhASESInadequateair clearancesbetween insulation surfaceofadjacentphaseconductorresultsinpartialdischargeactivity in overhangwindingand if continues for longduration can damage the winding insulation. Theinsulationsurfaceofcoilisprovidedwithsemiconductivecoatingtomaintainzeropotentialoninsulationsurface,whenmachineisappliedratedortesthighvoltage.Thisensuresnopartialdischargeinslotportion.

As thecoilcomesoutofslot, transition tapecoveringadequate length is provided to avoid tracking oninsulationsurface.Theelectricalstress(kV/mm)seenbyairgapisalmost4-5timestothatacrosswindingmaininsulation resultingunevenvoltagedistributionacrossinsulationandairgap.Thevoltageonoverhangwindinginsulationsurfaceisclosetothephasevoltageduringmachineoperation.

Table 1 :ClearancesbetweenPhasetoPhaseandPhasetoGroundinoverhangwinding

Sl. No.

Voltage grade in

kV

hV test voltage in

kV

Ph-Ph clearance in mm (nom./

min.)

1 6.6 14.2 5.0/3.0

2 11 23 8.0/7.0

3 13.8 28.6 10.0/8.0

VOLTAGE DISTRIBuTION BETwEEN ADJACENT PhASES

Thevoltagedistributionworkedoutasbelowestablishthatthecoilinsulation,whichhasaveryhighelectricalstrength(voltagebreakdownlevel)issubjectedtomuchlower electrical stress (kV/mm) as compared higherelectricalstressacrossairgap,whichhasalowervoltagebreakdownlevel.

Theinsulationthickness‘tk’ifconsideredas2mmandthegap‘d’as6mmfor11kVmotorwinding.Thecapacitancebetweentwoparallelplatesis

C=€A/t

Where‘€’isthepermittivityofmedium,‘A’istheareaofplateand‘t’isthespacingbetweentwoplates.

Thevoltageappearsacrossairgapduringhighvoltagetestwillbe inverselyproportional to thepermittivityofmedium.Thereforeelectricalstressacrossairmediumwillbe5timesthatofthemeasuredacrossinsulation.

Aspercalculation,thevoltageappliesacrossairin11kVmachinewillbe20.3kVand therefore thevoltagestressacrossairduringhighvoltagetestwillbe3.4kV/mm.Itwillbesafetoselecttheairgapbetweenadjacentphaseconductorsasnominal8.0mm(minimum7.0mm).Thosemachine,whichhaslowergapbetweenphasesarealsofoundinoperationbuttheinsulationagingrateisfast.ContinuousPDdeterioratestheinsulationwithtimeandcausefailure.

CONCLuSIONThe quality of high voltagemotor insulation systemcan to be ensured by adopting bestmanufacturingpractices.Use of software controlled coil taping, coilspreading and other equipments,which ensures theshapeconsistencyisnecessary.Thedesignphasetophaseandphasetogroundclearancearenecessarilyto be ensured in overhangwinding.Also the overallassessmentofmachinewindinginsulationsystemcanbedonebyconducting tandelta& tipup test,partialdischargemeasurementandcoronaimagingbestusingultravioletcamera.

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10

d d tk figure-7 Electrical clearance between adjacent conductor in overhang The insulation thickness ‘tk’ if considered as 2mm and the gap ‘d’ as 6mm for 11kV motor winding. The capacitance between two parallel plates is

C= €A/t Where ‘€’ is the permittivity of medium, ‘A’ is the area of plate and ‘t’ is the spacing between two plates. The voltage appears across air gap during high voltage test will be inversely proportional to the permittivity of medium. Therefore electrical stress across air medium will be 5 times that of the measured across insulation. As per calculation, the voltage applies across air in 11kV machine will be 20.3kV and therefore the voltage stress across air during high voltage test will be 3.4kV/mm. It will be safe to select the air gap between adjacent phase conductors as nominal 8.0 mm (minimum 7.0 mm). Those machine, which has lower gap between phases are also found in operation but the insulation aging rate is fast. Continuous PD deteriorates the insulation with time and cause failure. ConClusIon The quality of high voltage motor insulation system can to be ensured by adopting best manufacturing practices. Use of software controlled coil taping, coil spreading and other equipments, which ensures the shape consistency is necessary. The design phase to phase and phase to ground clearance are necessarily to be ensured in overhang winding. Also the overall assessment of machine winding insulation system can be done by conducting tan delta & tip up test, partial discharge measurement and corona imaging best using ultra violet camera.

Fig. 7:Electricalclearancebetweenadjacentconductorinoverhang


Mr. Michel AuGONNET (FR) , Treasurer, CIGRE hq Visited CIGRE-India Office at New Delhi on 8th September 2016

GLIMPSES OF RECENT VISIT OF DR. KONSTANTIN PAPALIu, ChAIRMAN CIGRE SC B2 ON OVERhEAD LINES AND

MR. RAJJOTE, ChAIRMAN CIGRE SC A2 TRANSFORMERS TO CBIP & CIGRE INDIA EXCELLENCE CENTER AT GuRGAON

(DELhI-NCR) ON 18th November 2016

31

Volume 6 v No. 1 v January 2017 32

CIGRE (Camseil International des Grands Réseaux Électriques - International Council on Large Electrical Systems)isoneoftheleadingworldwideOrganizationsonElectricPowerSystems,coveringthetechnical,economic,environmental,organizationalandregulatoryaspects.CIGRE-Paris aswell asCIGRE-India has 16 studygroups, each specializing in one specific technicaldomain.Indiahasamemberineachofthesegroups.

Accordingly, CIGRE-India had divided this two-dayconference into various sections/ parallel sessions.The respective CIGREGroupmember chaired thesession. The participantswere acquaintedwith thepapersselectedbyCIGREGroup,bywayofasummarypresentationofeachpaperandthequeriesthereto.Theparticipantswereaskedtopresenttheirviewsinrespectofthequeries,including,anyIndia-specificissues.

(L-R) Mr. V.K. Kanjlia, Secretary, CBIP on Podium, Mr. P.P. Wahi, Director, CBIP; Mr. Amitabh Mathur, Director (IS&P), BHEL & Vice President, CIGRE-India; Mr. R.P. Sasmal, Director (Operations), POWERGRID & Chairman –Technical, CIGRE-India; Mr. Atul Sobti, CMD, BHEL, Mr. Gurdeep Singh, CMD, NTPC; Mr. S.D. Dubey, Chairperson, CEA & President, CBIP; Mr. I.S. Jha, CMD, POWERGRID & President CIGRE-India; Mr. K.M. Singh, CMD, NHPC; Mr. K.K. Sharma, Director (Operations), NTPC & Vice President, CIGRE-India, and Mr. N.N. Misra, Former Director (Operations) NTPC & Vice Chairman-Technical, CIGRE- India; during inaugural session

CIGRE India Session 2016

natIonal ConfEREnCE onGlobal tREnds

and InnovatIons In dEvEloPmEnt of PowER

sECtoR28-29July2016,NewDelhi


Activity of the Society

CIGRE (INDIA) IS ThE NATIONAL COMMITTEE OF CIGRE PARISCIGRE-India hadorganizedaConferenceon “GlobalTrendsandInnovationsinDevelopmentofPowerSector”on28-29July2016atScopeConventionCenter,LodhiRoad,NewDelhi.ThisNationalConferencewasplannedpriortoCIGRE-ParisSession2016todiscussaboutthefollowingactivities.• To share experience and update knowledge on

Developments&InnovationsinPowerSystem.

• TohavetheinputandconsideredopinionfromtheexpertswithinthecountryonvarioustopicsaswellasontechnicalpapersbeingpresentedinCIGRESession2016atParis.

The unique event addressed by Chairperson, CEA;

CMD, POwERGRIDL; CMD, NTPC; CMD, BhEL and

CMD NhPC and attended by more than 300 professionals from

India and Bhutan



Mr. S.D. Dubey, Chairperson, CEA & President, CBIP, addressing the participants during inaugural session

Mr. I.S. Jha, CMD POWERGRID & President CIGRE-India, addressing the participants during inaugural session

• ToproposerepliesonvariousquestionsputupbyspecialreportersoftechnicalsessionofCIGREatPariswhichcouldberaisedanddiscussedwiththeInternationalexpertsduringthesession.

• ToplanoutstrategytobeadoptedbytheIndiandelegatesattendingtheCIGREParisSession2016toensuremaximumbenefitsfortheIndianEngineers.

Theconferencewaswidelyattendedby300participantsfromIndiaandBhutan.

PriortoTechnicalsession,therewasinauguralsessionon28thJuly2106inwhichfollowingdignitarieswerepresentondais.

• Mr.S.D.Dubey,Chairperson,CEA&President,CBIP

• Mr.I.S.Jha,CMDPOWERGRID&PresidentCIGRE-India

• Mr.GurdeepSingh,CMD,NTPC

• Mr.AtulSobti,CMD,BHEL

• Mr.K.M.Singh,CMDNHPC

• Mr.R.P.Sasmal,Director(Operations),POWERGRID&Chairman–Technical,CIGRE-India

• Mr.K.K.Sharma,Director(Operations),NTPC&VicePresident,CIGRE-India

• Mr.AmitabhMathur,Director(IS&P),BHEL&VicePresident,CIGRE-India

• Mr.N.N.Misra,FormerDirector(Operations),NTPC&ViceChairman-Technical,CIGRE-India

IntheinauguralsessionthewelcomeaddresswaspresentedbyMr.V.K.Kanjlia,Secretary,CBIPinwhichhebriefedregardingtheobjectiveofconference.Itwasalsointimatedbyhimthat18papershavebeenselectedfromIndiatobepresentedinCIGRE-Parissession.

WhileaddressingonthisoccasionMr.P.P.WahihighlightedthecontributionofMr.MataPrasadatNationalandInternationallevel.

Mr.I.S.Jha,CMD,POWERGRIDandPresidentCIGRE-Indiaaddressedtheparticipants.HeappreciatedCBIPandCIGRE-IndiaforprovidingsuchhugeplatformtotheEngineerstosharetheirexperiences.HealsoemphasizedthevariousproblemsbeingfacedbythePowersectorandcorrectiveactionstobetaken.

35



Mr.K.M.Singh,CMD,NHPCinhisaddresscongratulatedtheawardwinnersfor theirsignificantcontribution inPowersector.HealsocongratulatedtotheauthorswhosepapershavebeenselectedinCIGREParissession.HeemphasizedthatthepowersectorisintransitionstageandalotofchangeisgoingtotakeplaceinnextdecadeduetocomingupofrenewableenergysectorwhichwillbemajorsourceofEnergyinfuture.Thereisaneedforimprovementintheefficiency,reliabilityandqualitypower,needforreductioninthegenerationcost.HealsoemphasizedthatCIGRE-Indiaprovidestheopportunitytodiscussthevariousissuesatoneplatform.

Mr.GurdeepSingh,CMD,NTPCalsocongratulatedtheauthorswhosepapershavebeenselectedinCIGREParissession.Heexpressedhisconcernthatpowersectorisenteringindifferentscenarioeverydayandthereisaneedofenvironmentalfriendly,24x7reliablepowerataffordableprice.HealsohighlightedthattheaveragepoolpriceofPowerin1stquarterwasaroundRs3/-perunitandhencethereisneedtoreducethetarifftothecustomersbytheUtilities.

Mr.AtulSobti,CMD,BHELemphasizedthatthereisrapidgrowthinIndiabutstillintermsofpercapitaconsumptionwearelaggingmuchbehindtheotherCountries.Althoughwearesurplusinpowertodaybutwehavetothinkforthenext5years.Renewableenergyhastoplaykeyroleinthecountryandweexpectthat8%growthcanbemetbyRenewableEnergy.Still70%ofgenerationisfromThermalPowerandhencetomeetupthegrowthinthepowersectortheuseofcoalismostimportant.HesaidthattheroleofThermalgenerationthereforecannotbesetaside.ThereplacementofoldThermalunitswithsupercriticalunitsisthebetteralternative.Hebroughtoutthatpoliciesarestilluncertainandneedsreview.

Mr.S.D.Dubey,Chairperson,CEAandPresident,CBIPalsohighlightedtheimportanceofthisconferenceastherewillbelotofdeliberationsontheissuesrelatedtopowerforall,qualitypower,reliabilityandataffordableprice.HealsohighlightedtheachievementsofPowersectorinIndialike300+GWofGeneration,Constructionof1200kVlinesundertheleadershipofPOWERGRID,EstablishmentofhightestinglabatBinaetc.Healsoemphasizedthatwiththeinductionof175GWrenewablepowerupto2022,alotofchallengeslikeoperationalissuesinrespectofTransmissionandDistribution,storageproblemetc.arelikelytobefaced.Healsoemphasizedthatin12thfiveyearplan40%generationfromcoalwillbefromsupercriticalunitandalotofcontributionfromthemanufacturerswillberequired

Mr. Gurdeep Singh, CMD, NTPC, addressing the participants during inaugural session

Mr. Atul Sobti, CMD, BHEL, addressing the participants during inaugural session



In the lastof inauguralsession,voteof thankswaspresentedbyMr.P.P.Wahi,Director,CBIPandDirectorCIGRE-India.HethankedalltheCMD’sforsparingtheirvaluabletimetogracetheinauguralsession.Healsothankedtoalltheparticipantsandspecialinvitees.Itwasalsoinformedbyhimthat2no.postsinCIGRE-IndiahasrecentlybeencreatedandMr.R.P.Sasmal,Director(Operations),POWERGRIDisChairman-Technical,andMr.N.N.Misra,FormerDirector(Operations),NTPCasViceChairman-TechnicalofCIGRE-India.

TEChNICAL SESSIONS16TechnicalSessionswereconductedinparallelHallson28-29July2016asperfollowingschedule.

PROGRAMME

1030 - 1200

28.7.2016 29.7.2016

hall 1 hall 2 hall 1 hall 2

Transformers InformationSystems&Telecommunications

Substations SystemDevelopment&Economics

1200 -1330 OverheadLines ElectricityMarkets&Regulation

RotatingElectricalMachines

SystemOperation&Control

1430 -1600 HighVoltageEquipment Materials&EmergingTestTechniques

HVDC&PowerElectronics

InsulatedCables

1630 -1800 SystemTechnicalPerformance

Protection&Automation DistributionSystems&DispersedGeneration

SystemEnvironmentalPerformance

Mr. K.M. Singh, CMD NHPC, addressing the participants during inaugural session

Mr. V.K. Kanjlia, delivering the welcome address during inaugural session

37


Mr. M. Vijaya Kumaran


TEChNICAL SESSION ON SySTEM TEChNICAL PERFORMANCE (SC C4)ChairedbyMr.S.K.Negi,Chairman,NationalStudyCommitteeC4whichcoversthe technical progress in different fields suchaspower quality, electromagneticcompatibilityandinterference,insulationcoordination,lightningandpowersystemperformancemodelsandnumericalmethods.Therearetotal35papersinthestudygroupinPreferentialSubject1,2&3.

PS1–ImpactofInverterBasedGenerationandEnergyStorage(17Papers)PS2–ChallengeswithModelingandEvaluationofLightningPerformanceandIn-

sulationCoordinationinthePowerSystemofFuture(12Papers)PS3–BridgingtheGapBetweenEMT,FEMandPositiveSequenceGridSimula-

tion(6Papers)

TEChNICAL SESSION ON TRANSFORMERS (SC A2) ChairedbyMr.M.VijayaKumaran,Chairman,NationalStudyCommitteeA2,whichcoversall kindsof power transformersaswell as all activities related to design,manufactures,applicationofmaterials,safety /environmental issues,economic /commercialaspects,qualityassuranceandtesting.Therearetotal37papersinthestudygroupinPreferentialSubject1,2&3.

PS1–AdvancesinTransformerDiagnosticsandMonitoring(16Papers)PS2–EHV/UHVandEHVDC/UHVDCTransformersandtheirComponents,Shunt

Reactor(10Papers)PS3–TransformerWindings(11Papers)

TEChNICAL SESSION ON OVER hEAD LINES (SC B2) ChairedbyMr.Gopal Ji,Chairman,NationalStudyCommitteeB2which coversmechanicalandelectricaldesignandexperimentalvalidationofnewlinecomponents,performanceandassessmentofagedlinecomponents,constructionandoperationofoverheadlines,upratingofexistingoverheadlines.Therearetotal39papersinthestudygroupinPreferentialSubject1,2&3.

PS1–OverHeadLinesforHighPowerTransferCapacity(15Papers)

PS2–ProjectManagement,ConstructionandMaintenance(12Papers)

PS3–ApplicationofNewMaterialsandTechnologies(12Papers)

TEChNICAL SESSION ON hIGh VOLTAGE EquIPMENT (SC A3)ChairedbyMr.R.K.Tyagi,Chairman,NationalStudyCommitteeA3.Therearetotal29papersinthestudygroupinPreferentialSubject1,2&3.

PS1–HighVoltageEquipmentforEmergingSystemConditions(19Papers)PS2 – Life Time Management of Transmission and Distribution Equipment

(5Papers)PS3–ApplicationofInformationTechnologyToolsforDevelopmentand

ManagementofHighVoltageEquipment(5Papers)

Mr. S.K. Negi

Mr. Gopal Ji

Mr. R.K. Tyagi



TEChNICAL SESSION ON ELECTRICITy MARKETS & REGuLATIONS (SC C5)ChairedbyMr.S.K.Soonee,CEO,POSOCOandChairmanofSCC5.PaperspresentedbyMr.KaushikDey,SrEngineer,Mr.K.V.N.PawanKumar,Sr.Engineer,Mr.K.B.V.RamKumar,Engineer,Mr.ShubenduMukherjee,Dy.ManagerandMr.SubhashKumar,Engineer.Therearetotal30papersinthestudygroupinPreferentialSubject1,2&3.PS1–The Future of Regulation in the Evolving Market: Interactions between

WholesaleandRetailMarkets.(4papers).PS2–MarketModelsandRegulatoryStructuresinanEvolvingIndustrySituation

(18Papers)PS3–Distributed Resource, Demand Response and Storage Technology

Integration from the Perspective of Electricity Market and RegulatoryStructures(8Papers)

TEChNICAL SESSION ON MATERIALS & EMERGING TEST TEChNIquES (SC D1)ChairedbyMr.JithinSunder,ED,BHEL,ChairmanNSCD1.HewasSupportedbyDrM.MohanaRao,DGM,BHEL,Dr.SukumarRoy,Sr.DGM,BHELandMr.A.Pradeep,Dy.Manager,BHEL.Therearetotal32papersinthestudygroupinPreferentialSubject1,2&3.PS1–CompactInsulationSystems(ACandDC)(13papers)PS2–NewMaterials(8papers)PS3–Non-standardisedStressesandEmergingTestTechniques(11papers)

Mr. Jithin Sunder

Mr. S.K. Soonee

TEChNICAL SESSION ON INFORMATION SySTEMS & TELECOMMuNICATIONSChaired byMr. N.S. Sodha, former ED, PGCILandoutgoingChairmanofNSCD2alongwithMr.PrakashNayak,MD, Power Engg & AutomationwhoistheincomingChairmanofNSCD2.MrP.K.AgarwalofPOSOCO,supportedforpresentationofpapers.Therearetotal31papersinthestudygroupinPreferentialSubject1,2&3.TherearetwoIndianPapers(D2-302ofMrP.K.Agarwal&D2-303ofMr.N.S.Sodha).Therearetotal31papersinthestudygroupinPreferentialSubject1,2&3.PS1–Information andTelecommunication Technologies forConnectingDistributedEnergyResources (16 pa-

pers)PS2–MaintainingOperationalITReliabilityinanEvolvingEnvironment(5papers)PS3–TrendsinManagingUtilityCommunicationNetworks(10papers)Technical Session on Protection & Automation (SC B5)Chaired by outgoing Chairman Mr. S.G. PatkialongwithincomingChairmanMr.SubhashThakur,AGM,NTPCofNSCB5.AfterintroducingbyMr.S.G.Patki,summaryofthepapersdeliveredbyMr.SubhashThakur.Thereare total35papers in thestudygroupinPreferentialSubject1&2.PS1–ProtectionAutomationandControlSystem(PACS)OptimizationandLifeTimeAssetManagement(21Papers)PS2–Co-ordinationofGeneratorandPowerSystemProtection(14Papers)

Mr. S.G. Patki Mr. Subhash Thakur

Mr. Prakash NayakMr. N.S. Sodha

39


TEChNICAL SESSION ON ROTATING ELECTRICAL MAChINES (SC A1)ChairedbyMr.D.K.Chaturvedi,Chairman,NationalStudyCommitteeA1whichcoversresearch,designanddevelopment,manufacture,materialtechnology,operationandmaintenanceandassetmanagement.Therearetotal19papersinthestudygroupinPreferentialSubject1,2&3.

PS1–DevelopmentsofRotatingElectricalMachine(14Papers)

PS2–AssetManagementofElectricalMachines(4Papers)

PS3–RotatingMachineforRenewableandDispersedGeneration(1Paper)

TEChNICAL SESSION ON SuB-STATION (SC B3)ChairedbyMr.RajilSrivastava,Chairman,NationalStudyCommitteeB3whichcoversdesign,construction,maintenanceandongoingmanagementofsubstationandelectricalinstallationinpowerstationexcludinggenerator.Therearetotal38papersinthestudygroupinPreferentialSubject1,2&3.

PS1–AdvancesinSubstationTechnologies(14Papers)

PS2–DevelopmentsandNewThinkinginSubstationsDesign(13Papers)

PS3–EvolutioninSubstationManagement(11Papers)

TEChNICAL SESSION ON hVDC & POwER ELECTRONICS (SC B4)ChairedbyMr.OomenChandy,Chairman,NationalStudyCommitteeB4.Therearetotal45papersinthestudygroupinPreferentialSubject1,2&3.

PS1–HVDCSystemandtheirApplications(31Papers)PS2 –FACTSand otherPowerElectronicSystem for TransmissionSystem (9

Papers)PS3–DC,FACTSandotherPowerElectronicSystemforDistributionSystem(5

Papers)

TEChNICAL SESSION ON DISTRIBuTION SySTEM AND DISPERSED GENERATION (SC C6) ChairdedbyDr.SubirSen,Chairman,NationalStudyCommitteeC6.Therearetotal38papersinthestudygroupinPreferentialSubject1,2&3.

PS1–IntegratedPlanningandOperationforUpgradingDistributionNetwork(19Papers)

PS2–EnergyInfrastructureforUpgradingDistributionsNetworks(9Papers)PS3–MicrogridsandOffGridHybridSystem(10Papers)


Dr. Subir Sen

Mr. Rajil Srivastava

Mr. Oomen Chandy

Mr. D.K. Chaturvedi



TEChNICAL SESSION ON SySTEM OPERATION & CONTROL (SC C2)ChairedandpresentedpapersbyMr.K.V.S.Baba,ChairmanofNSCC2andED,NLDC,POSOCOsupportedbyMrAdityaPrasadDas,MrM.K.Ramesh,MrSaugatMandal,Mr.DebashishandMr.SunilKumar.Therearetotal38papersinthestudygroupinPreferentialSubject1&2.

PS1–GridOperationSolutionstoChangesinGenerationMixIncludingDistributedandRenewableGeneratingResources(25papers)

PS2–ManagingSystemDisturbancesandSystemRestoration(13papers)

TEChNICAL SESSION ON SySTEM DEVELOPMENT AND ECONOMICS (SC C1)ChairedandpresentedthepapersbyMs.SeemaGupta,ChairmanofNSCC1andED,POWERGRIDsupportedbyMr.AshokPal,GM,POWERGRID.Therearetotal36papersinthestudygroupinPreferentialSubject1,2&3.

PS1– StateoftheArtApproachesandStandardizationinAssetManagementDecisionMaking(6Papers)

PS2– InterfaceandAllocationIssuesinPlanningT&DNetworkswithMulti-PartyProj-ects(7Papers)

PS3– NewSystemSolutionsandPlanningTechniquesforFlexibleandRobustSystemPlans(23Papers)

TEChNICAL SESSION ON INSuLATED CABLES (SC B1)ChairedandpresentedpapersbyMr.DeepalShah,ChairmanofNSCB1.Therearetotal39papersinthestudygroupinPreferentialSubject1,2&3.

PS1– NewlyInstalledorUpgradedCableSystems(9Papers)PS2– BestUseofExistingCableSystems(16papers)PS3– FutureInsulatedCablesinPowerSystem(14papers)

TEChNICAL SESSION ON SySTEM ENVIRONMENTAL PERFORMANCE (SC C3)ChairedandpresentedpapersbyMr.AnishAnand,ChairmanofNSCC3andGeneralManager,POWERGRID,India.Therearetotal17papersinthestudygroupinPreferentialSubject1,2&3.

PS1–EnvironmentalLiabilitiesofTransmission&DistributionAssets(4papers)

PS2–OverheadLinesandUndergroundCables:AcceptabilityIssues(8Papers)

PS3–ClimateChange:ImplicationsforElectricPowerSystems(5papers)

ACDcontainingthecopyofpresentationswasdistributedtotheparticipants.

VOTE OF ThANKSMr.P.PWahiandMr.S.K.LambapresentedvoteofthanksinHall-1andHall-2respectively.Theythankedallthespeakers&delegates.Theyalsoappreciatedfortheirpresentationsandparticipationintheconference.Mr.WahigavegoodwishestotheauthorswhosepapershavebeenselectedforpresentationinCIGREParissession2016.

POSTER SESSIONThepostersessionwasalsoorganizedfortheauthorstopresenttheirpaperswhichhavebeenselectedforCIGREParissession.

Ms. Seema Gupta

Mr. Deepal Shah

Mr. Anish Anand

Mr P.P. Wahi, Director, CBIP proposing vote of thanks

Mr. K.V.S. Baba

41



A view of the participants during inaugural sessionPoster Session

Mr. S.G. Patki receiving Distinguish Members AwardMr. S.K. Soonee receiving Distinguish Members Award

Mr. S.K. Negi receiving Distinguish Members AwardMr. Mata Prasad, Founder President of CIGRE-India was honoured with Life Time Achievement Awards

AwARDS AND RECOGNITIONDistinguishMembersAwardwas introduced inCIGRE toacknowledge thesignificantcontributionof itsmembers,overanumberof years to theworkanddevelopmentofCIGRE.Following threeexpertswereselected fordistinguishedmembershipawardbyCIGREHQ,Parisfortheyear2016:Mr.S.K.Negi,M.D.,GETCOforSystemTechnicalPerformance,Mr.S.K.Soonee,CEO,POSOCOforMarketandRegulations,Mr.S.G.PatkifromTataPowerforProtectionandAutomationTheaboveexpertswerehonouredbyCIGRE-IndiaduringthePre-CIGREconferenceandthecertificatesissuedbyCIGRE,ParisfortheaboveawardswerepresentedbyMr.S.D.Dubey,Chairperson,CEAduringtheconferenceatNewDelhiIn addition to the above,Mr.MataPrasad Ji,who is the founderPresident ofCIGRE-Indiawas honouredwithpresentationoflifetimeachievementawardsforhislongassociationwithCIGRE-IndiaandexcellentcontributionforthedevelopmentofPowersector.


CIGRE sEssIon 2016 21st – 26th August 2016, at Paris

–AReportbyCIGREIndia

• CIGRE (International Council on Large ElectricSystems) is a permanent, non-governmental andnon-profitinternationalassociationfoundedin1921withitsHeadQuarteratParis.

• It isan international technical forum for thePowerindustry’ssystemoperators,equipmentmanufacturersandresearchestablishmentstodiscussandprovidesolutionsforallthemajortechnicalissues.

• CIGREisdedicatedtothedevelopmentofsolutionstoelectricitysector.

• CIGREhasMembers inmore than90 countries;andistheleadingworldwideorganizationonelectricpowersystems,coveringthetechnical,economic,environmental, operational, organizational andregulatoryaspects.

• Held every two years, theCIGRESessionhasareputationforprovidingauniqueopportunityforthedelegatesandexhibitorstosharetheirknowledgeandexperience.

OPENING CEREMONy OF BI-ANNuAL SESSION IN 2016TheopeningceremonytookplacedonSunday,August21st.TheinauguralkeynotewasdeliveredbyMr.ClaudioFacchin,President,PowerGridsDivision,ABBonshapingpower systemsof the future.Mr. Facchinmentionedvariouschallengesinpowersectoranddevelopmentsdriving key change in future grids, elements of smartpowergridsandtheshiftinpowerbusiness.

Picture of Inaugural Session of 46 CIGRE Session, the Bi-annual Technical Conclave held in Paris from 21st to 26 August 2016

Thefirstdaysessionafteropeningceremonyincludedthefollowingsessions:• Opening Panel: GlobalperspectiveofDistributed

Generationimpactonthebulkconnectednetwork• workshop : LargeDisturbances: Part1:System

disturbances/Part2:Marketdisturbances.• Tutorials o Tutorial onGuide to overall line design (AC&

DC)-Part1andGuidetotheconversionofexist-ingAClinestoDCoperation(Part2)byCIGREStudyCommittee(SC)B2onoverheadlines

o TutorialonModellingandDynamicPerformanceofRenewableEnergySystemsbyCIGRESCC4onsystemtechnicalperformance

o TutorialonAirInsulatedSubstationdesignforsevereclimateconditionsbyCIGRESCB3onSubstation

o Tutorial onHighVoltageDirectCurrent Trans-missionSCB4

o TutorialonPlanningandoperationofdistributionsystemswithhighsharesofRenewableenergybySCC6ondistributedanddispersedgeneration

o TutorialonResponsibleUseofSF6(OptionsandChallenges)andResiduallifeaspectsofGISbyCIGRESCB3onsubstation

TEChNICAL PROGRAM• Theeventattracted543numberoftechnicalpapers,

500+exhibitors and 8500 senior power sectorprofessionalsfromaroundworld.

43



• The technical programwaswell structured andspreadoveraperiodoffivedaysinparallelwiththeexhibition,

• Thetechnicalprogramincludedformalpresentations,panel discussions, technicalmeetingsandpostersessions,workshops&Tutorialstoaddressvariousissuesandchallengesinthepowersector.

• Thelatestdevelopmentslinkedtokeycomponentsofthetransmissionsystem,namely,rotatingmachines,substations, transformers, overhead lines andcableswerediscussedtogetherwithsystemdesign,operation,controlandsystemperformance.

• Thesession&Exhibitionattractednumberof theelectricityindustry’skeyinternationalmanufacturers,networkoperators,consultantsandserviceprovidersandofferedparticipantstheopportunitytocontributeandbenefitfromtheassembledindustryexperts.

Other MeetingsBesidesabove,CIGREAdministrativeCouncilmeeting,16StudyCommitteeandits;WorkingGroupmeetings;NationalcommitteesandRegionsMeetingswerealsoheldduringthesession.

PARTICIPATION FROM INDIA IN CIGRE SESSION 2016• Mr. I.S. Jha, Chairman & Managing Director,

POwERGRID and President, CIGRE-India led the delegation of more than 100 participants from India to CIGRE session 2016 (Participants List at Annexure-1)

• Participants were from the organizations like :POWERGRID, POSOCO,NTPC,BHEL,NHPC,NEEPCO, NDMC, GETCO, HPGCL, OPGCL,UPPCL, ISGF, PTC,RegulatoryCommission ofDelhi,HP,UP,Maharashtra,SikkimandUttarakhand,ABB,AdaniPowerTransmission,AlstomT&D,Aparindustries,Cargil IndiaPvt. Limited,CESC,CTR,ERDA,KalkiTech,KanoharElectricals,PowerTechGlobal, Scope T&M, Siemens, Sterlite PowerTransmission,Supreme&Co,SuzlonPower,TataPower,Transformers&Rectifiers.

• TheSr.levelofficerswhowerepresentbesidesMr.I.S.Jhawere:Mr.AtulSobti,CMD,BHEL;Mr.AmitabhMathur,Director,BHELandVicePresident,CIGRE-India;Mr.A.P.Mishra,MD,UPPCL;Mr.S.S.Dalal,Director-Technical,HPGCL;Mr.N.N.Misra,FormerDirector,NTPC&ViceChairman(Tech.),CIGRE-India;

Mr. I.S. Jha, CMD, POWERGRID during CIGRE AORC meeting at Paris

Dr. Subir Sen, ED, POWERGRID, India taking over the charge of Presidentship of CIGRE - AORC (Asia Oceans Regional Coun-

cil) from Malaysia during meeting at Paris

Mr. I.S. Jha, CMD, POWERGRID and Mr. P.P. Wahi, Director, CIGRE-India during CIGRE Administrative Council meeting at

Paris

Mr. P.P. Wahi, Director, CIGRE-India addressing during CIGRE Administrative Council meeting at Paris



Mr.KrishnaSaini,Chairman,DERC;Mr.S.K.B.S.Negi,Chairman,HPERC;Mr.SubhashKumar,Chairman,UERC;Mr.K.P.Singh,Member(Technical),UERC;Mr.S.K.Agarwal,Member-Finance,UPERC;Mr.DeepakLad,Member-Technical,MERC.

• IndiawasofferedaslotforkeynotepresentationintheTechnicalSessiononTransformersheldon26.8.2016duringCIGRESession2016.Mr.B.N.DeBhowmick,GM,POWERGRIDmadeexcellentpresentation.

PARTICIPATION IN CIGRE ADMINISTRATIVE COuNCIL• Mr.I.S.Jha,President,CIGRE-Indiawhoismember

ofCIGREAdministrativeCouncil,theadministrative

bodysupervisestheoperationofCIGRE,attendeditsmeetingatParis.

• President CIGRE Paris while appreciating theexcellentperformanceofCIGRE-IndiaasNationalCommittee, Invited India during themeeting topresentthebestpracticesadoptedbyCIGRE-Indiaforthetangibleachievements.

PARTICIPATION IN CIGRE AORC (ASIA OCEANA REGIONAL COuNCIL) MEETING AT PARIS• CIGRE-AORC(AsiaOceansRegionalCouncil) isa

forumforsharingexperienceandknowledgeregardingpertinenttechnicalissuesparticularlythoseaffectingpowersystemsintheAsia-OceanaRegion.

(L-R) Mr. Vijaykumar Kisanrao Wakchaure, Mr. P.P. Wahi, Director, CIGRE-India, Mr. Ravindra Vishnu Talegaonkar and Mr. S.G. Jagdale during CTR Exhibition stall at Paris

Mr. I.S. Jha, CMD, POWERGRID and Mr. P.P. Wahi, interatcting with exhibitors during CIGRE session 2016

hIGhLIGhTS & AChIEVEMENTS

highlights• Mr.I.S.Jha,CMD,POWERGRIDandPresident,CIGRE-Indialeadthedelegationofmorethan100participantsfrom

IndiatoCIGREsession2016atParis.• IndiahastakenovertheChairmanshipofCIGREAORC(AsiaOceanaRegionCouncil)duringthemeetingatParis.Dr.

SubirSen,ED,POWERGRIDtookoverasChairmanandMr.P.P.Wahi,Director,CIGREIndiaasSecretaryofCIGREAORCfortwoyears.

• Eighteen(18)TechnicalPaperswerepresentedinCIGREsessionfromIndia• Keynotepresentation in thesessiononTransformerswasmadeatParison26thAugust2016by

Mr.B.N.DeBhowmick,GM,POWERGRID• CIGRE Indiaparticipation inall the16CIGREStudyCommitteemeetingsduringCIGREsession

2016

Achievements• CIGREAdministrativeCouncilappreciatedtheeffortsofCIGRE-Indiafortheiractivitiesandmaking

membershipcounttodoublei.e.,550ascomparedto275lastyear.• CIGRESCA2onTransformers;B2onOverheadlinesandD1onMaterialshavedecidedtohavetheirmeetingand

JointcolloquiuminIndiainNovember2019• CIGRESCA1onRotatingMachineshavedecidedtohavetheirmeetingandconferenceinIndiainFeb.2019• CIGREWGJWGC4/B5.41havedecidedtovisitIndiafortheirmeetingatBangaloreon1&2Feb.2017

B.N. De Bhowmick

45



Mr. P.P. Wahi, Director, CIGRE-India making presentation to invite CIGRE SC A2; SC B2 and SC D1 to India in the year 2019

Mr. P.P. Wahi, Director, CIGRE-India with Chairman SC B2 (Dr. Konstantin O Papailiou) during his presentation at Paris

• Thecountries fromAsiaOceanaRegion,whoareassociatedwith the forumare :Australia;China;Cambodia;GulfCooperativeCouncil;HongKong;India;Indonesia;Iran;Jordan;Japan;Korea;Malaysia;NewZealand;Taiwan;&Thailand.

• Mr.I.S.Jha,President,CIGRE-Indiaattendedtheadministrativemeeting ofCIGREAORCheld on24.08.2016atParisduringCIGREsession2016.

• TheactivitiesreportofvariouscountrieslikeJapan,Korea,NewZealand, Thailand, Indonesia,ChinaandIndiawaspresentedinthemeeting.

• TheChairmanshipofAORChasbeenofferedtoIndiaduringthemeeting.Dr.SubirSen,ED,POWERGRIDtookoverasChairmanofCIGREAORCandMr.P.P.WahiasSecretaryCIGRE-AORCfortwoyearduringthemeeting.

PARTICIPATION IN TEChNICAL SESSION/ POSTER SESSION• Duringthetechnicalsession18technicalpapers(Listat

Annexure2),acceptedfromIndia,andwerepresented.Authorsofthesepaperswerealsogivenopportunitytoparticipateinthepostersessionfordetailedinteractionwiththeparticipantsontheirpapers.

PARTICIPATION IN ThE EXhIBITION• M/sScopeT&MandCTR from Indiaparticipated

in theexhibitionanddisplayed theirservices to theindustry.

• Theparticipants availed theexcellent opportunitytoupdatetheirknowledgebyvisitingexhibitionandinteractingwiththeexhibitorsabouttheirinnovationsandlatestdevelopments.

PARTICIPATION IN CIGRE STuDy COMMITTEE MEETINGS• CIGREoperate through16 studyCommitteeson

varioussubjectscomprisingexpertsfromabout24differentcountriesineachcommittee.

• ItisamatterofpridethatIndiaisrepresentedinallthesixteenstudycommitteesofCIGRE.

• The study committeemeetings held during thesessionatPariswere attendedby themembers/theirrepresentativefromIndia(Annexure 2)

• ThevariousCIGREStudyCommitteeswereinvitedtoholdtheirfuturemeetingsinIndiaforthebenefitoftheprofessionalinIndia.

Mr.P.P.Wahi,Director,CIGRE-IndiainvitingCIGRESCA2;SCB2andSCD1toIndia

• TheCIGREStudyCommitteeA2(transformers);SCB2(overheadlines)andSCD1on(Materials)haveagreedtovisitIndiatohavetheirmeetingandJointcolloquiuminNovember2019.

• CIGRESCA1(RotatingMachines)havealsoagreedtovisitIndiainFebruary2019.

• CIGRESCB1 (HVCables) are visiting India inOctober2017.

• CIGRESCA3 (HighVoltage equipment)SCB5(Protection),SCC1(PowerSystemPlanning)andSCC6 (DistributedGeneration) have agreed toconsidertherequestforholdingtheirmeetinginIndiain2021.

ThisisgoingtobenefittheprofessionalfromIndiainabigway.

DINNER hOSTED By CIGRE-INDIA & ISGF AT PARIS ON 23RD AuGuST 2016A dinner was hosted by CIGRE-India & ISGF, Sr.DignitariesfromIndiaandofficebearersofCIGREi.e.President,SecretaryGeneralandTechnicalCommitteemembersparticipated.



1. PFISTERER :Mr.DeepalShah,CountryDelegate2. ABB • Mr.DemudunaiduObbalareddi

• Mr.SachinSrivastava

• Mr.RajivGovil,Sales&Marketing

3. AdaniTransmissionLtd

• Mr.BipinBShah,Sr.VP

• Mr.R.K.Singh,GM-Transmission

4. Alstom T & D :Mr.PurshottamKalky,Sr.Manager-Engg.

5. Apar Industries : Mr. S.K. Jana, GM- qA6. BhEL • Mr.AtulSobti,CMD

• Mr.AmitabhMathur,Director(IS&P)

• Mr.JithinSundar,ED(TBG)

7. Cargill India Pvt Ltd • Mr.NaveenJain,TechnicalSales

• Mr.RajaramShinde,Techno-commercial

8. CESC Limited : Mr. S. Bhattacharya, GM-Construction

9. CIGRE India • Mr.N.N.Misra,ViceChairman–Tech.&For-

merDirector(Operations),NTPC

• Mr.P.P.Wahi,Director(IT)

• Mr.VishanDutt,ChiefManager

10. Consultant & Former ED POwERGRID :Mr.N.S.Sodha

11.Consultant & former GM, POwERGRID :Mr.GopalJi

12. CTR Manufacturing Ind. Ltd. • Mr.V.K.Wakchaure,VP,Gr.III

• Mr.R.V.Talegaonkar,President,GrI

• Mr.S.G.Jagdale,SrGM

• Mr.D.M.Jadhav,Div.Mgr-ExportDivision

13. Electricity Regulatory Commission of • Delhi-Mr.KrishnaSaini,Chairman

Annexure 1

102 PaRtICIPants fRom IndIa took PaRt In CIGRE sEssIon 2016 at PaRIs

• H.P.–Mr.S.K.B.S.Negi,Chairman

• Maharashtra-Mr.DeepakLad,Member-Technical

• U.P.-Mr.S.K.Agarwal,MemberFinance

• Uttarakhand-Mr.SubhashKumar,Chairman

• Uttarakhand–Mr.K.P.Singh,Member(Techni-cal)

14. ESSAR Steel India Ltd. :Mr.SubirKumar.GM15. ERDA • Mr.SatishChetwani,HeadR&D

• Mr.VinodKumarGupta,Asst.Director&Head

16. GE Energy Management : Ms . Tanav iShrivastava

17. GE T&D India Ltd :Mr.SantoshAnnadurai18. GETCo. Ltd. • Mr.M.K.Jani,DeputyEngineer,MDOffice

• Mr.NileshSheth,DeputyEngineer(Engg)

19. hPGCL • Mr.SwaroopSinghDalal,DirectorTechnical

• Mr. Vinit Mishra, Executive Engineer/400 kVSwitchyard

20. India Smart Grid Forum • Ms.ReenaSuri,GM-BusinessServices

• Mr.AmolSawant,SmartGridSeniorSpecialist

• Mr.RejiKumarPillai,President

21. International Copper Association :Mr.AjitAdvani,Advisor

22. Kalkitech :Mr.PrasanthGopalakrishnan,CEO23. NDMC • Mr.SurenderKumarNegi

• Mr.BhikhariSinghBhati

• Mr.VijayKumarPandey

24. NEEPCO :Ms.ElizabethPyrbot,Manager,BD25. NhPC • Mr.ArvindBhat,GM,Design(E&M)

• Mr.HimangshuSaha,CE,Design(E&M)

• Mr.J.Choudhry,ED,O&M

47



• Mr. S.K. Agrawal, Construction & O&M, Com-mercial

• Mr.MohammedAbdulGafur

26. NTPC Limited • Mr.SubhashThakur,AGM(PE-Elect.)Engg.

• Mr.A.K.Gupta,ED,Engineering

• Mr.BimleshSingh,GM,OS

• Mr.D.K.Chaturvedi,AGM,(PE-Elect.)Engg.)

• Mr.M.Chivukula,AGM(Elect.Mtc.)

27. OPGCL • Mr.SanjayMishra,DGM-Maintenance

• Mr.SanjayGarhwal,FactoryManager

28. POSOCO • Mr.RajibSutradhar,DGM

• Mr.K.V.S.Baba,ED

• Mr.A.P.Das,Manager

• Mr.NitinYadav,Sr.Engineer

• Mr.K.V.N.PawanKumar,Sr.Engineer

• Mr.SaugatoMondal,Manager

29. POwERGRID • Mr.I.S.Jha,CMD

• Ms.SeemaGupta,COO,CTUPlanning

• Mr.BNDeBhowmick,GM,T&D

• Mr.A.Choudhary,ED,NERegionTransmissionSystem

• Mr.R.K.Chauhan,ED,HVDC

• Mr.SubirSen,ED,SmartGrid

30. Powertech Global Pvt Ltd. :Mr. PiyushSaraf,MD

31. PTC India Limited :Mr.AjitKumar,Director(Comm.&Opns)

32. Ramelex Pvt Ltd. :Mr.RamJogdand,CMD33. Savita Oil Tech. Ltd. :Mr.NarasimhanC.Srini,

HeadR&D

34. Scope T&M Pvt Ltd. • Mr.SanjayKulkarni,CMD

• Mr.YashKulkarni

• Mr.BalasahebDoiphode,CEO

35.SIEMENS Ltd :Mr.SubodhSureshKale,R&D36.Sterlite Power Grid Ventures Ltd. • Mr.AjayBhardwaj,President&BusinessHead

• Mr.RajasekharChilukuri,AssetManagement

37.Suzlon Power Infrastructure Ltd :Mr.PulinShah,MD

38. Tata Power Company Ltd. • Mr. Narayan Sirdesai, Head - MO EHVCable

Group

• Mr.MayureshV.Deodhar,Maharashtra,

• Mr.RamachandranPillai,Chief,Corp.Operation(T&D)

39.Transformers & Rectifiers India Ltd :Mr.V.K.Lakhiani,Director,Technical

40.uPPCL :Mr.A.P.Mishra,ManagingDirector41. Companion • HPGCL-Mrs.SaritaDalal

• NHPC-Mrs.NaumaanAnsari

• NDMC-Mrs.S.K.Negi

• HPERC-Mrs.KavitaNegi

Nominations withdrawn after registration due to their other important assignmentso POWERGRID

• Mr.R.P.Sasmal,Director(Operations)

• Mr.R.K.Tyagi,AGM

• Mr.M.SRao,CDE,HVDC

• Mr.KashishBambani,ChiefManagerSG

o KanoharElectricalsLtd:Mr.M.Ramaswamy,COO,GIS

o Supreme&Co. Pvt. Ltd. :Mr. Harish Agarwal,CEO

o NEEPCO:Ms.BonaniChoudhury,DGM(O&M)

o POSOCO

• Mr.AkhilSinghal,Dy.Manager

• Mr.R.M.Krishnamoorthy,ChiefManager

o ElectricityRegulatoryCommissionofSikkim

• Mr.NandaRamBhattarai,Chairperson

• Mr.PalchenDorjeeChaktha,Director (Tariff&Technical)



• NTPC-EnsuringHighQualityInsulationSystemofLargeMotors–Design&TestingRequiring-A.K.Gupta,D.K.Chaturvedi,P.K.Basu

• AlstomT&D-3Phase420kVShuntReactormanufacturingandqualitysensitivityforvibrationcontrol–Acasestudy-VijayakumaranMoorkath,TanviSrivastava,NiladriSekharMitra

• SCOPET&MPvt.Ltd.-TransformationinLifetimeAssetManagementofEHVCircuitBreakers–ACaseStudy-BalasahebDoiphode,SanjayKulkarni,YashKulkarni,N.S.Sodha(EX.ED,POWERGRID)

• TheTataPowerCo.Ltd.-Monitoringandup-gradationofUndergroundCableNetwork by variousmethods -NARAYANSIRDESAI&DILIPM.MIRASHI(TheTataPowerCo.Ltd);MAHENDRAKUMAR(DelhiMetro)andKIRITRANA(CESCLtd.)

• TheTataPowerCo. Ltd. -ExecutionOfTransmissionProjectsWith InnovativeMethodsForAugmentationOfEHVNetwork InMegaCityofMumbai–Challenges&Solutions-UKMaharaja,VishwasSurange,PMurugan,SandeepDeshmukh,PSVerma,MVDeodhar

• POWERGRID - Operational Experience In 1200kV(UHVAC)NationalTestStation, India– I.S.Jha,B.N.De.Bhowmick,S.B.R.Rao,Dhyeya.R.Shah,RachitSrivastava,R. K. Singh (BHEL); Prof. S. V. Kulkarni,SantoshKumar(IIT/M)

• POWERGRID - Commissioning Experience andChallengesofWorld’sFirst800kV,6000MWNER–AgraMultiterminalHVDCSystem-NarendraKumar,M.S.Rao,B.B.Mukherjee,RakeshKumar,M.M.Goswami,OommenChandy

• GETCO-TransmissionAssetManagementThroughIn-HouseDevelopedSoftwareforTransmissionSystemofGujaratState-M.K.JANI

• POSOCO - Enhancing resilience of theNorth IndianPowerSystemagainstpollutionandfoggyweather-AnExperience-V.K.Agrawal,K.V.S.Baba,S.R.Narasimhan,R.K.Porwal,NitinYadav,AnkitGupta,S.S.Goyal

• POSOCO-NLDC- IntroductionofSub-HourlyMarket inPowerExchangesandFacilitatingLargeScaleRenewableEnergyIntegrationinIndia-S.K.Soonee,V.K.Agrawal,S.S.Barpanda,S.C.Saxena,KaushikDey,K.V.N.PawanKumar

• ISGF-LeveragingSmartGridsAssetsforBuildingSmartCitiesatMarginalCost-RejiKumarPillai,S.A.Khaparde

• ERDA-ThermoplasticsforLVSwitchgearApplication-BeemaThangarajanR,SatishHChetwani,MilindOak

• POSOCO-EnsuringUptimeofWAMSNetworkwiththeHelpofCommonITTools–CaseStudies-V.K.Agrawal,P.K.Agarwal,HarishKumarRathour,PuneetMaury

• POWERGRID-CommunicationNetworksforIndianSmartGrids-N.S.Sodha,FormerED,POWERGRID

• POWERGRID-AC-DCInteractionStudyForUpcoming± 800 kV, 3000MWChampaKurukshetraHVDCLink-MaheshVardikar,VishwajeetSingh,M.S.Rao,VikasBagadia,MMGoswami,OommenChandy.

• GETCO-RetrofittingAndModernizationOfConventionalSubstationToAnIEC61850BasedAutomatedSubstation–ACaseStudyOf400kVAmreliSubstation-N.M.Sheth,S.K.Jadav,B.J.Patel

• AlstomGrid -Substationautomation fromconventionalto full digital technologies – case studies and impact -PurshottamKalky,RiteshBharat,ShantanuDey,SaurabhMakwana.

• POWERGRID - TransmissionSystemPlanning underuncertainties including renewablepenetration regime inIndianContext-I.S.Jha,Y.K.Sehgal,SubirSen,KashishBhambani

CIGRE STuDy COMMITTEE MEETINGS DuRING CIGRE SESSION 2016-PARTICIPATION OF CIGRE INDIA • SCA1onRotatingElectricalMachines–Meetingattended

byShriD.K.Chaturvedi,AGM,NTPC• SCA2onTransformers-MeetingattendedbyMe.Tanavi

Shrivastava,Alstom• SCA3onHighvoltageEquipment–MeetingAttendedby

ShriN.N.Misra,ViceChairman-Tech,CIGREIndia• SCB1onHVInsulatedcables–MeetingattendedbyMr.

DipalShah,Pfisterer• SCB2onOverheadLines - MeetingattendedbyMr.

GopalJi,FormerGM,POWERGRID• SCB3onSubStation–MeetingattendedbyMr.Abhay

Choudhury,ED,POWERGRID• SCB4onHVDC–meetingattendedbyMr.R.K.Vhauhan,

ED,POWERGRID• SCB5onPowerSystemProtection–meetingattended

byMr.SubhasThakur,AGM,NTPC• SCC1onPowerSystemPlanning&Development-meeting

attendedbyMs.SeemaGupta,ED,POWERGRID• SCC2onPowerSystemOperation&Control–meeting

attendedbyMr.K.V.S.baba,ED,POSOCO• SCC4 onSystem technical Performance -meeting

attendedbyMr.N.M.Seth,GETCo• SCC5 onElectricitymarkets& regulations -meeting

attendedbyMr.K.V.S.Baba,ED,POSOCO• SCC6onDistributionSystem&DispersedGen.-meeting

attendedbyDr.SubirSen,ED,POWERGRID• SCD1 onMaterial for Electro Technology –meeting

attendedbyMr.JithinSunder,ED,BHEL• SCD2 on Information System& telecommunication

-meeting attended byMr. N.S. Sodha, Former ED,POWERGRID

Annexure 2tEChnICal PaPERs (18 nos.) fRom IndIa

PREsEntEd duRInG CIGRE sEssIon 2016 at PaRIs


bRIEf about CIGRE IndIaCIGRE(India)theNationalCommitteeforCIGREwassetupassocietyintheyear1991

Governing Council of CIGRE India Office Bearers :TheCommitteehasthefollowingofficebearers.

President : I.S.Jha,CMD,POWERGRIDVice President : K.K.Sharma,Director,NTPCVice President : AmitabhMathur,Director,BHELChairman – Technical : R.P.Sasmal,Director,POWERGRIDVice Chairman – Technical : N.N.Misra,FormerDirector,NTPCSecretary & Treasure : V.K.Kanjlia,Secretary,CBIPDirector In charge : P.P.Wahi,Director, CBIP

• CIGRE-AORC(AsiaOceansRegionalCouncil) isa forumforsharingexperienceandknowledgeregardingpertinenttechnicalissuesparticularlythoseaffectingpowersystemsintheAsia-OceanaRegion.

• ThecountriesfromAsiaOceanaRegion,whoareassociatedwiththeforumare:Australia;China;Cambodia;GulfCooperativeCouncil;HongKong;India;Indonesia;Iran;Jordan;Japan;Korea;Malaysia;NewZealand;Taiwan;andThailand.

• Mr.I.S.Jha,PresidentCIGREIndiaattendedtheadministrativemeetingofCIGREAORCheldon24.08.2016atParisduringCIGREsession2016.

• TheChairmanshipofAORChasbeenofferedtoIndiaduringthemeeting.Dr.SubirSen,ED,POWERGRIDtookoverasChairmanofCIGREAORCandShriP.P.Wahi,DirectorCBIPasSecretaryofCIGREAORCfortwoyearduringthemeeting.

ProgressandachievementsofCIGREIndia• GrowthofMembership

Years 2011 2012 2013 2014 2015 2016Membership 280 276 243 325 244 611

*TillDecember2016

CIGRE DISTINGuIShED MEMBERS AwARDS1996• ShriMataPrasad• ShriK.S.Madhawan,GECAlstom• ShriP.M.Ahluwalia1998• ShriR.T.Chari,TagCorporation2000• ShriP.Bose,EMC,Kolkata2002• ShriB.S.Palki,ABB• Dr.T.Adhikari,BHEL2004• ShriYogendraPrasad• ShriBhanuBhushan,CERC

2012• ShriN.N.Misra,Director(Operation),NTPC

• ShriR.P.Sasmal,Director(Opn.),POWERGRID

• ShriM.Vijayakumaran,Sr.Tech.Expert,Alsthom

2014• ShriY.K.Sehgal,ED,POWERGRID

• ShriA.K.Mishra,AGM,POWERGRID

• ShriB.B.Shah,VP,KalpataruPowerTransmission

2016

• ShriS.K.Soonee,POSOCO

• ShriS.K.Negi,GETCO

• ShriS.G.Patki,TataPower

P.P.WahiSubirSen



CIGRE (IndIa)BENEFITS TO MEMBERS

• Freedownloadingofabout9000referencedocumentsi.e.,papers&proceedingsofSession&symposium;TechnicalbrouchureontheworkofstudycommitteesandElectratechnicalpapersetc.

• AfreedeliveryoftheELECTRAJournal,abilingual(French/English)magazineissuedeverytwomonthswhichpublishestheresultsofworkperformedbytheCIGREStudyCommitteesandinformsonthelifeoftheAssociation.

• ReducedregistrationfeesforSessionsandSymposia.• SessionandSymposiumPapersandProceedingsavailableatapreferentialprice(50%).• TechnicalBrochuresandotherReportsatapreferentialprice,orfreeofchargewhendownloadedfromCIGREon-

lineBookstore.• AMembershipDirectorywhichisalinkbetweenmembersandanessentialtoolforcontacts,freeofcharge.• UpdatedInformationaboutCIGREInternationalandotherMeetingsofinterestformembers.• TheassistanceoftheCentralOfficeforanyquery.

• Papers accepted for 2012, 2014 and 2016 session –Twelve,SeventeenandEighteenrespectively

• ParticipationinCIGREsession-Morethan75peopleareparticipatingfromIndiainCIGRE2012sessionandabout60attendedCIGREsession2014.ForSession2016,morethan100.

• Representation in CIGRE Study Committees–allthesixteencommittees

• Representation in CIGRE Administrative Council for 2012-2014 & 2014-16-Mr.R.N.Nayakand2016-18 Mr.I.S.Jha

CIGRE Study Committee meeting recently held in India

S. N. Study Committee Status 1 CIGRESCD2:Information&Telecommunication Heldin2013atMysore2 SCB4onHVDC HeldinSept.2015atAgra

CIGRE Study Committee meeting Planned in India

S. N. Study Committee Status 1 SCB1onHVInsulatedCables Plannedin9-13Oct.2017at

NewDelhi2 SCA2(Transformers)/D1(Materials)/B2(overheadLines) JointMeetingplannedinNov.20193 SCA1–RotatingElect.Machines plannedinFeb.20194 SCA3–HighVoltageEquipment

SCC2–SystemOperationInvitationalreadysent

5 SCB3–SubstationSCC1–PlanningSCC4-SystemtechnicalPerformanceSCC6–DistributedGeneration

InvitationbeingBeingsent

• Publication of half yearly CIGRE India Journal ToincreasetheactivitiesandmembershipCIGREIndiahastakentheinitiativetopublishitsJournalinitiallywith

thefrequencyofsixmonths.

TheCIGREIndiajournalcontainsdetailsabouttheactivitiesoftheassociation,technicalarticles,anddataandiscirculatedtoitsmemberswithinthecountry.Thejournalservesanexcellentpurposeofdisseminatingthetechnological,innovativedevelopmentsetc.amongsttheconcernedorganizationsoftheenergysector,whicharetakingplaceatthenationalandinternationallevel.Thejournalisavailablebothinprintandonlineversions.


1 KEIIndustriesLtd.2 Power System Operation Corporation Ltd.

(POSOCO),SRLDC3 Reliance InfrastructureLtd.MumbaiTransmission

Business4 NTPCLimited5 SterlitePowerGridVenturesLimited6 PowerGridCorporationofIndia7 Transformers&Rectifier(India)Ltd.8 Power System Operation Corporation Ltd.

(POSOCO),WRLDC9 CentralPowerResearchInstitute

10 BHELR&D

11 PowerSystemOperationCorporation(NERLDC)

12 SavitaOilTechnologiesLtd.

13 SkipperLimited

14 CentralElectricityAuthority(CEA)

15 HYOSUNGT&DIndiaPvt.Ltd.

16 ScopeT&MPvtLtd

17 ToshibaTransmission&DistributionSystems(I)PvtLtd.

18 RamelexPrivateLimited

19 BharatHeavyElectricalsLtd.(BHEL)

20 Larsen&ToubroLimited-Construction

21 UniversalCablesLimited

22 Supreme&CompanyPrivateLimited

23 TheTataPowerCompanyLtd.

24 PowerSystemOperationCorporationLtd,,ERLDC

25 CESCLimited

26 AdaniTransmissionLimited

27 NTPCSailPowerCompanyPvt.Ltd.

28 PowergridCorporationofIndia(ER-II)

29 PowerSystemOperationCorporationLtd(POSOCO)

30 PowerGridCorporationofIndiaLtd.,Kurukshetra

31 TheMotwaneManufacturingCo.PvtLtd

32 Maharashtra State Electricity TransmissionCo.Ltd.

33 TataPowerDelhiDistributionLimited

34 PowergridCorp.ofIndiaLtd.,NRTS-II

35 PowerGridCorp.ofIndiaLtd(NER)

36 SiemensLimited,EMTS

37 BharatHeavyElectricalsLtd,Bhopal

38 IndiaSmartGridForum

39 NHPCLimited

40 NTPC-DadriSSTP

41 PowergridCorp.ofIndiaLtd,SRTS-1

42 PowergridCorp.ofIndiaLtd,NRTS-3

43 PowergridCorp.ofIndiaLtd,SRTS-II

44 PowergridCorporationofIndiaLtd,OdishaProject

45 PowergridCorp.ofIndiaLtd,WRTS-I

46 NTPCLimited,Faridabad

47 NTPCLimited,SingrauliSTPS

48 NTPCLimited,KahalgaonSTPS

49 NTPCLimited,RihandSTPP

50 NTPCLimited,VindhyachalSTPS

51 BharatHeavyElect.Ltd,(HEEP)Hardwar

52 NorthEasternElectricPowerCorp.Ltd

53 NTPCLimited,Kayamkulam

54 NTPCLimited–Koldam

55 NTPCLimited,SimhadriSTPP

56 NTPCLimited,Talcher-KnihaSTPS

57 NTPCLimited,BongaigaonTPP

58 NTPCLimited,KorbaSTPS

59 NTPCLimited,Jhanor-GandharGPP

60 NTPCLimited,KawasGPP

61 NTPCLimited,BARH

62 NTPCLimited,TalcherTPS

63 NTPCLimited,Auraiya

64 NTPCLimited,Tanda

65 PowerGridCorp.ofIndiaLimited,WRTS-II

66 PowergridCorp.ofIndiaLimited,ERTS-I

67 NTPCLimited,SIPATSTPS

68 NTPCLimited,Unchahar

69 NTPCLimited,Badarpur

70 NTPCLimited,AntaGPS

71 NTPCLimited,MoudaSTPP

72 BharatHeavyElectricalsLimited

73 NTPCLimited,RamagundamSTPS

Organizational Members

CIGRE mEmbERs fRom IndIa In 2016

51



Individual MembersFAMILy NAME FuNCTION ORGANISATIONMr.VivekThiruvenkatachari Dept.Director TagCorporationMr.ArvindGupta AGM-OTS AdaniPowerLimitedMr.SatishChetwani Sr.Manager,Technologyand

CommircializationElectrical Research and DevelopmentAssociation

Ms.ShefaliTalati Dy.Manager,Technology&Commercialization

Electrical Research and DevelopmentAssociation

Mr.DipakrashmiTripathi Jt.President,Operation&Maintenance AdaniTransmissionLimitedMr.SanjeevBhatia TechnicalSpecialist,electrical Bechtel(India)Pvt.Ltd.NayakPrakash ManagingDirector PenaPowerEngg.&Automation(P)Ltd.BipinBShah SR.VicePresidentEngineering AdaniTransmissionLtdShahSujalkumarB Dy.GeneralManager-Engineering KalpataruPowerTrans.Ltd.ShahDhwaniS Asst.Gen.Manager-Engineering KalpataruPowerTrans.Ltd.MakaramNarasimhanRavinarayan

ManagingDirector TaurusPowertronicsPvt.Ltd.

PatkiSanjaySishtlaV.N.JithinSundar GeneralManager,(TES) BharatHeavyElectricalsLtd.BahiratHimanshu AsstProfessor,DeptofElectricalEngg. IndianInstituteofTechnology,BombayKonkimallaVenkataSrinivasaBaba

ExecutiveDirector-NLDC PowerSystemOperationCorporationLtd.(POSOCO)

ThakurSubhash Addl.GM,ProjectEngg.(Electrical) NTPCLimitedGondaJora AssociateProfessorDept.ofElect.&

ElectronicsEngg.NationalInstituteofTechnology,Karnataka,Surathkal

RaoI.R. FacultyMember-Dept.ofElect.Engg. NationalInst.OfTechnologyKarnatakaKordeAditya ManagingDirector DiagnosticTechnologiesIndiaPvtLtdMoorkathVijayakumaran SeniorExpert-Engineering ALSTOMT&DIndiaLtdSodhaN.S FormerED PowerGridCorporationofIndiaLtd.RavindraKumarTyagi Addl.GeneralManager PowerGridCorporationofIndiaLimitedVikasShahajiJagadale Jt.ManagingDirector ShreemElectricLtd.S.R.Narasimhan Addl.GeneralManager,NLDC PowerSystemOperationCorp.LimitedParantapKrishnaRaha Head-SubstationEngineering SterlitePowerGridVenturesLtd.AmitKothari Dy.GeneralManager(GridSolution

Engineering)AlstomT&DIndiaLimited

UdayaKumar Professor,DepartmentofElectricalEngineering

IndianInstituteofScience

SameerGaikwad RegionalSalesManager DobleEngineeringPvt.Ltd.SeemaGupta ChiefOperatingOfficer(CTU-Planning&

CostEngineering)PowerGridCorporationofIndiaLimited

Institutional Members1. KarnatakaElectricityRegul.Commission2. MaharashtraElectricityRegulatoryCommission3. UttarakhandElectricityRegulatoryCommission4. SikkimStateElectricityRegulatoryCommission5. ElectricalResearch&DevelopmentAssociation6. DelhiElectricityRegulatoryCommission

7. EasternRegionalPowerCommittee8. Jt.ERCforManipurandMizoram9. IndianInstituteofTechnologyBombay10.U.P.ElectricityRegulatoryCommission11.OdishaElectricityRegulatoryCommission

53


CIGRE Members from India in 2016

KrishnanS.Balasubramanian

Consultant

PradeepKumarGangadharan

Director ProtectionEngg.&ResearhLaboratories

SooneeSushilKumar ChiefExecutiveOfficer PowerSystemOperationCorpn.Ltd.UmeshMaharaja Head-TransmissionProjects(Retired) TataPowerCompanyChendurVenkataraoVenkataChalapathi

Dept.PrincipalEngg.(HVCables) BalfourBeattyInsfra.IndiaPvtLtd.

DhananjayKumarChaturvedi

Addl.GeneralManager NTPCLimited

Ms.AnaghaDixit GeneralManagerTRE EMCOLtd.Mrs.MaryMody GeneralManager-Engineer EMCOLtdMr.RajendraVinayakSaraf HeadPlanning-PSCC TheTataPowerCo.Ltd.Mr.BurjupatiNageshwarRao

JointDirector(PowerCablesLab) CentralPowerResearchInstitute

Mr.VenkaiahChintham AssociateProf.-ElectricalEngineering NITMr.PurshottamKalky SeniorManager-Engineering ALSTOMT&DIndiaLimitedMr.AlokRoy ChiefExecutiveOfficer ReliancePowerTransmissionLtdMr.NaveenNagpal Dy.GeneralManager ReliancePowerTransmissionLtd.Mr.VikrantJoshi GeneralManager-Technology

TransformersCromptonGreavesLtd

Mr.RajeshKumar ChiefManager-(SmartGrid) PowerGridofCoporationIndiaLtdMr.MuralikrishnaKodakandla

DGM,WRLDC PowerSystemOperationCorporation

Mr.ChandanKumar Engineer,MarketOperation(MO-III) POSOCO,WRLDCMr.PrithwishMukhopadhyay GeneralManager-WRLDC POSOCO,WRLDCMr.MuthurajRamaswamy AGM,GlobalR&DCentre CromptonGreavesLimitedMr.SamirChandraSaxena Dy.GeneralManager POSOCO,NLDCMr.VivekPandey ChiefManager(SystemOperation) POSOCO,WRLDCMr.MadhuryyaProsadChakravorty

HOD,Electro-Mechanical(Design) EIPL,EnergyInfratechPvt.Ltd.

Mr.BapujiPalki GridAutomationProducts ABBLimitedMr.AnilKumarJha SE(Elect)ElectricityDeptt DamodarValleyCorporation(DVC)Mr.HabibChowdhary ExecutiveEngineer J&KPowerDevelopmentDepartmentMr.SavadamuthuUsa Prof.DivisonHighVoltageEngg. AnnaUniversityMr.SukhbirKapoor Dy.GeneralManager ALSTOMGridDr.AradhanaRay DirectorTechnical LaxmiAssociatesMr.RajeshSuri Head-HVDCCompetencyCentre AlstomT&DIndiaLimitedMr.SubhasisJhampati Engineer(SystemDesign) ALSTOMT&DIndiaLtd.Mr.FirozAhmed Manger,HVDCPEAIndia ALSTOMT&DIndiaLtd.Mr.AjitAdvani AdvisoronSustainableEnergy InternationalCopperAssociationMr.GuptaSarveshkumarVirendrakumar

Manager(Projects) KECInternationalLimited

Mr.VineetShawravTigga Manager PowerGridCorporationofIndiaLimitedVinodKumarAgrawal ExecutiveDirector RegenPowertechPrivateLimitedSrimantaKumarJana GeneralManager-(QA) AparIndustriesLtd.Mr.VikasJalan Jt.ManagingDirector DeccanEnterprises(Pvt.)Ltd.ArunKumarMishra GeneralManagerProjects-2SR-1 PowerGridCorporationofIndiaLtd



ArvindKumarSharma Sr.Ex.VicePresident RelianceInfrastructureLtd.ArvindShrowty Head-EHV&BusinessDevelopment KEIIndustriesLtd.Mr.SatyajitGanguly ManagingDirector ONGCTripuraPowerCompanyLtd.SurinderKumarNegi ManagingDirector GujaratEnergyTransmissionCo.LtdUmeshbhaiC.Patel ChiefEngineer(TR) GujaratEnergyTransmissionCoLtdBhadreshBChauhan ChiefEngineer(project) GujaratEnergyTransmissionCo.LtdBhadreshkumarB.Mehta ChiefEngineer(SLDC) GujaratEnergyTransmissionCoLtdManishkumarK.Jani D.E.toM.D. GujaratEnergyTransmissionCo.LtdJayeshM.Gandhi DeputyEngineer(Testing) GujaratEnergyTransmissionCo.LtdPrafulK.Varasada Dy.Engineer(SMS) GujaratEnergyTransmissionCoLtdYogeshVishnuJoshi SuperintendingEngineer(Engineering) GujaratEnergyTransmissionCo.Ltd.NileshM.Sheth Dy.Engineer(Engineering) GujaratEnergyTransmissionCoLtdRameshchandraP.Satani Dy.Engineer,(Engineering) GujaratEnergyTransmissionCoLtdBankimkumarP.Soni ExecutiveEngineer(Engineering) GujaratEnergyTransmissionCoLtdAshaM.Agravatt DeputyEngineer(Engineering) GujaratEnergyTransmissionCo.Ltd.Mr.PravinchandraMehta CEO PersotechSolutionsSubrataKarmakar AssistantProfessor;Departmentof

ElectricalEngineeringNationalInstituteofTechno.,Rourkela

Ms.AngelicaPohshna Sr.Manager(E/M) NEEPCOMr.HillolBiswas Advisor,Transmission/Power WAPCOSLtd.Mr.ManojKumarMuthyala Dy.ChiefEngineer,PowerDivision WAPCOSLimitedMr.RajuDVSN SeniorGeneralManager,PowerDivision WAPCOSLimitedMr.RameshBongu Engineer(Electrical) WAPCOSLimitedMs.PandharkarAnjani Dy.Manager,R&D PuneUniversityMr.ShriInduBhushanSrivastava

CentralBoardofIrrigation&Power

Mr.MataPrasad Advisor/ConsultantMr.RaviKumarPuzhankara AssociateConsultant,Electrical DNV-KEMAMr.DeepalShah CountryDelegate-India PFISTERERMr.SingaramChristianJohnson

Dean&Professor,Civil ExcelEngineeringCollegeExcel

Mr.GopalJi Consultant AngeliqueInternationalLimitedMr.AnilKaplush Consultant AngeliqueInternationalLimitedMs.BoppudiAnanthaSarma GeneralManager,AssetManagement PowerGridCorporationofIndiaLtd.Mr.SandeepKulkarni Sr.Manager,Design CromptonGreavesLimitedMr.V.K.Kanjlia Secretary CentralBoardofIrrigation&PowerMr.UrmilParikh SmartAssetManagementSpecialist,

PGHV-ServicesABBIndiaLimited

Mr.ManojKumarAgrawal Dy.GeneralManager,(SO-1) Power System Operation Corporation,NRLDC

Mr.RajivKumarPorwal Dy.GeneralManager,(SO) PowerSystemOperationCorp.,NRLDCMr.NarendraNathMisra FormerDirector(Operations) NTPCLimitedMr.HrushaabhPrashaantMishra

ChiefTechnicalOfficer SyselecTechnologiePrivateLimited

Mr.RahulBanerjee SeniorBusinessDeveloper GDFSuezEnergyPrivateLimitedMr.VenkateswaraRaoEdupuganti

HeadEngineeringServicesT&D KECInternationalLimited

Mr.SunilBhanot GM-EngineeringServices KECInternationalLimited

55


CIGRE Members from India in 2016

Mr.DaljitSinghBijral Addl.VicePresident Parbati Koldam TransmissionCompanyLtd.

Mr.AnilRawal VicePresident Parbati Koldam TransmissionCompanyLtd.

Mr.SachinSrivastava AssociatePrincipalEngg.(Applications) ABBGlobalIndustries&ServicesLtd.Mr.SubhashChandraTakalkar

ManagingDirector TakalkarPowerEngineers&ConsultantsPvtLtd

Mr.RabindraNathNayak SmartecMr.RameshDattarayaSuryavanshi

Director AlfaConsultants,LokhandwalaCompl.

Mr.VijaykumarWakchaure VicePresident(GroupIII) CTRManufacturingIndustriesLtd.Mr.RavindraVishnuTalegaonkar

VicePresident(GroupI) CTRManufacturingIndustriesLtd.

Mr.NeneMilind Sr.VicePresident KalpataruPowerTransmissionLtd.Mr.RajendraPrasadSasmal Director(Operation) PowerGridCorporationofIndiaLimitedMr.InduShekharJha Chairman&ManagingDirector PowerGridCorporationofIndiaLtdMr.SenSubir ExecutiveDirector PowerGridCorporationofIndiaLimitedMr.SushilChaudhari Asst.GeneralManager–Technology RajPetroSpecialitiesPvtLtdMr.DeepakKumarSaxena Sr.VicePresident WelspunEnergyLtd.Mr.BarindraNarayanDeBhowmick

GeneralManager(T&D) PowerGridCorporationofIndiaLtd

Mr.TarunKumarGarg EngineeringHead-PowerTransformers ABBIndiaLimitedMr.AbhayKumarAgrawal Head-TransformerTechnologyCenter ABBIndiaLimitedMr.AjayBhardwaj President&BusinessHead SterlitePowerGridVenturesLimitedMr.SusobhanBhattacharya GeneralManager(Construction) CESCLimitedMs.BonaniChoudhury Dy.GeneralManager,(O&M) NorthEasternElectricPowerCorporationMr.SwaroopSinghDalal DirectorTechnical Haryana PowerGeneration Corporation

LtdMr.MayureshV.Deodhar TataPowerCompanyLtdMr.SanjayGarhwal FactoryManager OdishaPowerGenerationCorporationLtd.Mr.PrasanthGopalakrishnan

CEO Kalkitech

Mr.RajivGovil Sales&Marketing ABBIndiaLimitedMr.NaveenJain TechnicalSales CargillIndiaPvtLtdMr.SubirKumar GeneralManager EssarSteelIndiaLtd.Mr.RameshMandaKrishnamoorthy

ChiefManager PowerSystemOperationCorporationLtd.(SRLDC)

Mr.SanjayMishra Dy.GeneralManager(Maintenance) OdishaPowerGenerationCorporationLtd.Ms.ElizabethPyrbot Manager,BusinessDevelopment

&CoordinationNorthEasternElectricPowerCorporation

Mr.PulinShah SuzlonPowerInfrastructureLtd.Mr.RajaramShinde Techno-commercial CargillIndiaPvtLtdMr.SubodhKumarAgrawal ExecutiveDirector(Commercial) NHPCLimitedMr.MohammedAbdulGafurAnsari

PowerGeneration NHPCLimited

Mr.JanardanChoudhry ExecutiveDirector,O&M NHPCLTDMr.SubodhKale CircuitBreaker,R&D SiemensLtdMr.DemudunaiduObbalareddi

SeniorScientist-ABBCorporateResearchCenter

AbbGlobalIndustries&ServicesLtd.



Mr.HimangshuSaha ChiefEngineer,Design(E&M) NHPCLimitedMs.AnitaJoshi Sr.GeneralManager TataConsultingEngineersLtd.Mr.NishatWasim Asst.GeneralManager AngeliqueInternationalLimitedMr.RiteshBharat Director-ApplicationsandBD GEGridAutomationMr.MonalPatel Owner MapPowerLLPMr.SoubhikAuddy TeamManager,PSGR&D ABBGlobalIndustriesServicesLtd.

young MembersNAME DESIGNATION ORGANISATION

BharatSoni Dept.:Engineering AdaniTransmissionLimited

PrayasGupta Dept.:Operation&Maintenance AdaniTransmissionLimited

SarasijDas AssistantProfessor,ElectricalEngineeringDepartment

IndianInstitureofScience

Y.Nagarjun Asst.Engineer KarnatakaPowerCorporationLtd.

BapatAtul Director SukrutElectricCo.Pvt.Ltd.

BapatPradnya HOD-Marketing SukrutElectricCo.Pvt.Ltd.

RadheyShyamMeena M.Tech.(PowerSystem)ElectricalEngg.

SBCET-Jaipur, Rajasthan TechnicalUniversity,Kota

Mr.AdityaDokania Manager-Projects DoksunPowerPrivateLimited

Mr.RachinAgarwal Manager-ElectricalDesignEngineering ALSTOMT&DIndiaLimited

Mr.RajatMisra EngineerSystems.SystemDesign GeneralElectricGridSolution

Mr.DineshBabuKrishtappaNagalingam

PowerSystem GeneralElectric

Mr.VipulSingh SiteEngineer Larsen&Toubro

Mr.YongWooLee HyosungT&DIndiaPrivateLimited

Mr.BharatNandula TechnicalApplicationSpecialist Qualitrol

Mr.MohitBhatnagar GraduateEngineerTrainee BharatAluminiumCompanyLimited

Mr.SivajiBurada Engineer,Design&PowerTransmission

SterlitePowerTransmissionLimited

Mr.RuhulIslam ApplicationManager ISAAdvanceIntrumentsPvt.Ltd

Mr.KunalSharma Director(Technical) Green-WattTechnoSolutionPvtLtd

Mr.SudalaiShunmugamSundaram

Sr.ResearchFellow,HVD CentralPowerResearchInstitute

Mr.NirajKulkarni Partner REVEN-TEC

Mr.KondalaRaoBandaru Sr.TechnicalConsultant,PowerConsult

ABBIndiaLimited

Mr.NageswaraRaoAkoju Sr.TechnicalConsultant,PowerConsulting

ABBIndiaLimited

Ms.AnchalMittal AssociateDirector,Research IndiaInfrastructurePublishingLimited

Mr.AbhishekReddySheri AssistantProf.,ElectricalEngg.Dept. MahatmaGandhiInstituteofTechnology


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lIst of PaPERs PREsEntEd fRom IndIa In CIGRE sEssIon 2016

at PaRIs fRom 21-16 auGust 2016

S. No.

SC & PS PAPER TITLED AuThOR (S) ORGANISTION

01. A1-PS1 EnsuringHighQualityInsulationSystemofLargeMotors–Design&TestingRequiring

A.K.Gupta,D.K.Chaturvedi,P.K.Basu NTPC

02. A2-PS2 3Phase420kVShuntReactormanufacturingandqualitysensitivityforvibrationcontrol–Acasestudy

VijayakumaranMoorkath,TanviSrivastava,NiladriSekharMitra

AlstomT&DIndiaLtd.

03. A3-PS2 TransformationinLifetimeAssetManagementofEHVCircuitBreakers–ACaseStudy

BalasahebDoiphode,SanjayKulkarni,YashKulkarni,N.S.Sodha–Ex.ED,POWERGRID

SCOPET&MPvt.Ltd.

04. B1-PS1 FieldExperience on newly installed cablesysteminlargemetrocitiesofIndia

Dilip M. Mirashi, Narayan SirdesaiMahendraKumarKiritRana

The Tata Power Co. Ltd.DelhiMetroCESCLtd.

05. B2-PS2 Execution of Transmission ProjectsWithInnovativeMethods for Augmentation ofEHVNetwork InMegaCity ofMumbai –Challenges&Solutions

UKMaharaja,VishwasSurange,PMurugan,SandeepDeshmukh,P.S.Verma,MVDeodhar

TheTataPowerCo.Ltd.

06. B3-PS3 OperationalExperienceIn1200kV(UHVAC)NationalTestStation,India

I.S.Jha,B.N.De.Bhowmick,S.B.R.Rao,Dhyeya.R.Shah,RachitSrivastavaR.K.SinghProf.S.V.Kulkarni,SantoshKumar

POWERGRIDBHELIIT/Mumbai

07. B4-PS1 CommissioningExperienceandChallengesofWorld’sFirst800kV,6000MWNER–AgraMultiterminalHVDCSystem

NarendraKumar,M.S.RaoB.B.Mukherjee,RakeshKumar,M.M.Goswami,OommenChandy

POWERGRID

08. C1-PS1 TransmissionAssetManagementThroughIn-HouseDevelopedSoftwareforTransmissionSystemofGujaratState

ManishkumarK.Jani GETCO

9. C3-PS3 Enhancing resilience of theNorth IndianPowerSystemagainst pollutionand foggyweather-AnExperience

V.K.Agrawal,K.V.S.Baba,S.R.Narasimhan,R.K.Porwal,NitinYadav,AnkitGupta,S.S.Goyal

POSOCO

10. C5-PS2 IntroductionofSub-HourlyMarketinPowerExchanges and Facilitating Large ScaleRenewableEnergyIntegrationinIndia

S.K.Soonee,V.K.Agrawal,S.S.Barpanda,S.C.Saxena,KaushikDey,K.V.N.PawanKumar

POSOCO-NLDC

11. C6-PS2 LeveragingSmartGridsAssetsforBuildingSmartCitiesatMarginalCost

RejiKumarPillai,S.A.Khaparde ISGF

12. D1-PS2 EcoFriendlyThermoplasticInsulationforLVSwitchgearApplication

BeemaThangarajanR,SatishHChetwani,MilindOak

ERDA

58

59


List of Papers Presented from India in CIGRE session 2016 at Paris from 21-16 August 2016

13. D2-PS1 EnsuringUptimeofWAMSNetworkwiththeHelpofCommonITTools–CaseStudies

V.K.Agrawal,P.K.Agarwal,HarishKumarRathour,PuneetMaury

POSOCO

14. D2-PS1 CommunicationNetworks for IndianSmartGrids

N.S.Sodha FormerED,POWERGRID

15. B4-PS1 AC-DC InteractionStudyForUpcoming±800 kV, 3000MWChampa KurukshetraHVDCLink

MaheshVardikar,VishwajeetSingh,M.S.Rao,VikasBagadiaMMGoswami,OommenChandy

POWERGRID

16. B3-PS2 RetrofittingandModernizationofConventionalSubstationToAnIEC61850BasedAutomatedSubstation–ACaseStudyof400kVAmreliSubstation

N.M.Sheth,S.K.Jadav,B.J.Patel GETCO

17. B3-PS1 SubstationAutomation fromConventionalto fullDigitalTechnologies–CaseStudiesandImpact

PurshottamKalkyRiteshBharatShantanuDeySaurabhMakwana

(AlstomGrid,India)&(AlstomGrid,France)

18. C1-PS3 Transmission System Planning underuncertaintiesincludingrenewablepenetrationregimeinIndianContext

S.Jha,Y.K.Sehgal,SubirSen,KashishBhambani

POWERGRID

lIfE Is a CombInatIon of suCCEss and faIluRE

both aRE nEEdEd



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fIElds of aCtIvIty of CIGRE study CommIttEEsStudy Committees

No.Scope

A1 Rotating Electrical Machines:Economics,design,construction,test,behaviourandmaterialsforturbinegenerators,hydro-generators,nonconventionalmachinesandlargemotors.

A2 Transformers : Design,construction,manufactureandoperationforallkindsofpowertransformersincluding industrial,DC converters and phase-shift transformers and for all types of reactors andtransformercomponents(bushing,tap-changer…)

A3 high Voltage Equipment :Theory,design,constructionandoperation foralldevices forswitching,interruptingandlimitingcurrents,surgesarresters,capacitors,busbarsandequipmentinsulatorsandinstrumenttransformers.

B1 Insulated Cables : Theory,design,applications,manufacture,installation,testing,operation,maintenanceanddiagnostictechniquesforlandandsubmarineACandDCinsulatedcablessystems.

B2 Overhead Lines :Design,studyofelectricalandmechanicalcharacteristicsandperformance,routeselection,construction,operation,servicelife,maintenance,refurbishmentupratingandupgradingofoverheadlinesandtheircomponentsincluding:conductors,earthwires,insulators,towers,foundationandearthingsystems.

B3 Substations :Design,construction,maintenanceandongoingmanagementofsubstationsandelectricalinstallationsinpowerstations,excludinggenerators.

B4 hVDC and Power Electronics :Economics,application,planningaspects,design,protection,control,constructionandtestingofHVDClinksandtheassociatedequipment.PowerElectronicsforACsystemsandPowerQualityImprovementandAdvancedPowerElectronics.

B5 Protection and Automation :Principles,design,applicationandmanagementofpowersystemprotection,substationcontrol,automation,monitoringandrecording–includingassociatedinternalandexternalcommunications,substationmeteringsystemsandinterfacingforremotecontrolandmonitoring.

C1 System Development and Economics :Economicsandsystemanalysismethodsforthedevelopmentofpowersystems:methodsandtoolsforstaticanddynamicanalysis,planningissuesandmethodsinvariouscontext,assetsmanagementstrategies.

C2 System Operation and Control : Technical and human resource aspects of operation of powersystems:methodsandtoolsforfrequency,voltageandequipmentcontrol,operationalplanningandrealtimesecurityassessment,faultandrestorationmanagement,performanceevaluation,controlcentrefunctionalitiesandoperatorstraining.

C3 System Environmental Performance :Identificationandassessmentoftheimpactsonenvironmentofelectricpowersystemsandmethodsusedforassessingandmanagingtheenvironmentalimpactofsystemequipment.

C4 System Technical Performance :Methodsandtoolsforpowersystemanalysisinthefollowingfields:powerqualityperformance,electromagneticcompatibility,lightningcharacteristicsandsysteminteraction,insulationcoordination,analyticalassessmentofsystemsecurity.

C5 Electricity Markets and Regulation :AnalysisofdifferentapproachesintheorganisationoftheElectricSupply Industry :differentmarketstructuresandproducts, related techniquesand tools, regulationsaspects.

C6 Distribution Systems and Dispersed Generation : Assessmentoftechnicalimpactandrequirementswhich newdistribution features imposeon the structure andoperation of the system :widespreaddevelopmentofdispersedgeneration,applicationofenergystoragedevices,demandsidemanagement;ruralelectrification.

D1 Materials and Emerging Test Techniques :Monitoringandevaluationofnewandexistingmaterialsforelectrotechnology,diagnostictechniquesandrelatedknowledgerules,andemergingtesttechniqueswithexpectedimpactinmediumtolongterm.

D2 Information Systems and Telecommunications : Principles, economics, design, engineering,performance,operationandmaintenanceoftelecommunicationandinformationnetworksandservicesforElectricPowerIndustry;monitoringofrelatedtechnologies.


GROwTh OF INSTALLED CAPACITy (Figures in MW)

At the end of 11th Plan (March 2012)

As on 31.10.2016

Planned for 12th Plan

Planned for 13th Plan

THERMAL 131603.18 212468.90 72340.00 56400.00HYDRO 38990.40 43112.43 10897.00 12000.00NUCLEAR 4780.00 5780.00 5300.00 18000.00RENEWABLEENERGYSOURCES

24503.45 45916.95 30000.00 30500.00

TOTAL 199877.03 307278.28 118537.00 116900.00CaptiveGeneration-40726MWSource : CEA

ALL INDIA REGION wISE INSTALLED CAPACITy

As on 31-10-2016(Figures in MW)

Region Thermal hydro Nuclear RES Total

Northern 52080.76 18376.78 1620 8976.44 81053.98

Western 83326.42 7447.50 1840 15818.49 108432.40

Southern 44359.00 11668.03 2320 20277.82 78624.85

Eastern 30592.87 4378.12 0 564.39 35535.38

N.Eastern 2069.80 1242.00 0 268.72 3580.52

Islands 40.05 0 0 11.10 51.15

All India 212468.90 43112.43 5780 45916.95 307278.28Percentage 69.10 14.0 1.90 15.0 100

Source : CEA

SECTOR wISE INSTALLED CAPACITy AND GENERATION As on 31-10-2016

Sector Installed Capacity (Mw)

Percentage Share

Generation (Mu)

Thermal Nuclear hydro RES Total During October 2016

STATE 71155.13 0.0 28341.00 1975.40 101471.53 33.0

99709.57*PRIVATE 82562.94 0.0 3120.00 43941.55 129624.49 42.0CENTRAL 58750.83 5780.00 11651.43 0.00 76182.26 25.0TOTAL 212468.90 5780.00 43112.43 45916.95 307278.28 100 .00

*Includes943.59MUImportfromBhutan.Source : CEA

Technical Data

HIGHLIGHTS OF POWER SECTOR In IndIa

63


Technical Data

GROwTh OF TRANSMISSION SECTOR

unit At the end of 11th Plan

(March 2012)

Addition During

October, 2016

As on 31.10.2016

Expected addition

during 12th Plan

Expected addition

during 13th Plan

TRANSMISSION LINES

109440 130000

+/-800kVHVDC ckm9432

2574 6080+/-500kVHVDC ckm 0 9432765kV ckm 5250 4029 25828400kV ckm 106819 6017 153147220kV ckm 135980 3778 161016Total Transmission Lines ckm 257481 16398 357949 109440 130000 SuBSTATIONS+/-800kVHVDC MVA

97501500 3000

270,000 300,000+/-500kVHVDC MVA 0 13500765kV MVA 25000 13500 154500400kV MVA 151027 15920 225387220kV MVA 223774 8140 301622TOTAL MVA 409551 39060 698009 270,000 300,000

RuRAL ELECTRIFICATION / PER CAPITA CONSuMPTION (As on 31-10-2016)

Totalno.ofVillages 597464No.ofVillagesElectrified 589585%ofVillagesElectrified 98.68No.ofPump-setsEnergized 20558235PerCapitaConsumptionduring2014-15 *1010kWh

*Provisional

RE SECTOR IN INDIA: POTENTIAL AND AChIEVEMENTS (As on 30.9.2016)

GRID-INTERACTIVE POwERPotential (Gw) Achievement (Mw)

SectorWind 103 28082.95SolarPower(SPV) 749 8513.23SmallHydro(upto25MW) 20 4323.35BagasseCogeneration/Biomass 25 4882.33WastetoPower 2.7 115.08 Total (Approx)

900 45916.64

OFF GRID/CAPTIVE POwER 1382.68

Source : MNRE


nEwsTATA POwER, ICICI VENTuRE TEAM uP, EyE POwER ASSETSWiththegovernmentrelaxingrulesfollowingasurgeinbadloans,fundshavebeenattractedbytheprospectsofacquiringtroubledassetsatdeepdiscounts.

TataPowerBSE 1.12%,which pioneered electricitygeneration in the country, and ICICIVenture, one ofIndia’sbiggestdomesticprivateequityfund,onFridayteameduptotakeoverstressedpowerassetsinAsia’sthird largesteconomy.TheTataPower-ICICIVentureisthelatestallianceinthestressedassetsspaceafterPiramal-BainCapitalCreditandBrookfield-SBI.

TataPower holds a 26 per cent stake in the newlyincorporated company, called Resurgent PowerVentures.While ICICIVenturewill be responsible fororganisingequityanddebtfinancingfortheacquisitions,TataPowerwillmanagetheoperationsofthecoal-firedandhydropowerplants.

Resurgent,constitutedinSingapore,hasgotthebackingof Canada’s second largest pension fund, Caissededepot et placement duQuebec, andof sovereignwealth funds—Kuwait InvestmentAuthority andStateGeneralReserveFundofOman.Thepowerplatformwillinitiallyraise$850millionwiththethreeglobalfundsputtinginabout$500million.Thecapitalcanbeupsizedgoingforward,dependingonmarketopportunities,thecompaniessaidinajointstatement.

Resurgent intends to acquire controlling stakes inconventionalandnon-conventionalpowerprojectsthatareeithercompletedornearingcompletion.

TataPowerhasrouteditsequityinResurgentthroughitswhollyownedsubsidiaryTataPower International,while ICICI Venture has structured its investmentthroughparentICICIBank’sBahrainbranch.Thepowersector,whichisladenwithhighdebt,hasseenseveraldevelopersputtingtheirassetsontheblock.Source : TNN, 10.9.2016

hIGhER POwER PuRChASE COSTS EATS INTO PROFITS AT CESCCESCregistered amarginal 1.6% growth in totalcomprehensive income under the new accountingstandards–IndAs,forthefirstquarterofthecurrentfinancialyearagainstthepreviouscorrespondingperiod.

Comprehensiveincomeisthesumofnet income(netprofit) and other items thatmust bypass the incomestatement because they have not been realized.According to the new accounting standard - IndAs,totalcomprehensiveincomeisabetterindicationofthecompany’sprofitsratherthannetprofit.

Nevertheless,CESC’snetprofit for thequarterunderreviewwasRs174crore,againstRs173croreinthepreviouscorrespondingperiod.

Profit growthwasmarginal despite a 11%growth intotal income from operations atRs 1,912 crore duetoincreasedoutgoonaccountofa25%riseinpowerpurchasecostaswellasriseinemployeecosts.

Thecompanysold2,700millionunitsofpowerduringthequarteragainst2,550millionunits in thepreviouscorresponding period - a near 6%growth in energysales.Source : ET Bureau, 14.9.2016

FRENCh POwER MAJOR EDF PLANS $2 BILLION GREEN BET ON INDIAFrenchstate-runpowermajorEDFwillinvestheavilyinrenewableenergyinIndia,withprojectsworth$2billionin thepipeline,and isbullishabout thesector,whereitseeselectricity tariffs falling30%infiveyears,EDFEnergiesCEOAntoineCahuzactoldET.

IndiaisamongthefewcountriesEDFhaschosenforasignificantexpansionofitsglobalportfolioofrenewableenergy because the country has a huge demandpotential,powerscarcityand“fantastic”qualityofwindandsolarradiation,Cahuzacsaid.

EDF is also interested in nuclear energy, forwhich ithas initial agreementswithNuclearPowerCorp, butregulatoryissuesarestillunderdiscussion,hesaid.EDFalsohasinterestinhydropowergenerationinIndiaandislookingatafewprospects,hesaid.Source : ET Bureau, 20.9.2016

RAyS POwER INFRA LAuNChES 100 Mw SOLAR PROJECT IN uTTARAKhANDRaysPowerInfra,asolarenergycompany,willsetupa100mwsolarpowerplantinUttarakhand.TheProject’sexecutionbeganinAugust,2016,andisexpectedtobecommissionedbyFebruary,2017.ItwillbeexecutedbyRaysPowerInfraonturnkeybasis-fromlandacquisitiontocommissioning.

PawanSharma,director-projects,RaysPowerInfrasaid,“Aftersuccessfullycommissioninga55MWSolarPowerPVprojectinU.P.,this100MWprojectinUttarakhandwillbeourbiggestproject.”

The100MWproject is spreadover a sprawling landarea at Tehsil - Bhagwanpur in RoorkeeDistrict ofUttarakhand. It comesunderUttarakhandRenewableEnergyDevelopmentAgency’s (UREDA) competitivebiddingfor2015-16.Source : ET Bureau, 20.9.2016

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News

STATES TO GET CENTRE’S FINANCIAL SuPPORT FOR FREE POwER SChEMETheCentrewill extend financial support to states toenablethemtooffernewelectricityconnectionsfreeofcosttoeveryone.

At present, electricity connections to only belowpovertyline(BPL)familiesareofferedforfree.AseniorgovernmentofficialsaidtheUnionpowerministryhasproposedtoextendthefreeconnectionsschemetoallinlinewiththeCentre’sgoaltoachieve24x7powerforallbyMarch2019.

RuralElectrificationCorporationBSE0.65% (REC) isworkingonaschemetoprovidelong-termloanstostatesthatagreetoofferfreenewelectricityconnections.TheschemewillbeakeyissuefordiscussionwhenUnionpowerministerPiyushGoyalmeetsstatepowerministersduring the two-day conference of powerministersstartingOctober 7 inGujarat. REC isworking on aschemeforfinancingthepowerdistributioncompaniesso that theycouldreleasenewelectricityconnectionstohouseholds.

Theschemecoversfundingofexpenseslikelayingoflinestogiveaccesstoelectricity,installationofmetersandotheraccessories.Aspertheplan,thedistributioncompanies will have to get new connection plansapproved by REC, which will reimburse expensesincurredbypowerutilitiesingivingelectricityaccesstohouseholds.

“Itwillbeanoptionalschemeforthestates.Somestatesmaynotseemeritinprovidingfreepowerconnectionstoremoteareasthatarenotconnectedtotheelectricitygrid.WewouldencouragesuchstatestoatleastofferelectricityconnectionsoneasymonthlyinstalmentsofaslowasRs100permonthfor4-5years,”thegovernmentofficialsaid.

We do need transparent budgetary subventions tobetter allocate resources for power. But in tandem,weneedtogeneratethenecessarypoliticalwilltoputpaidtopopulismandgrossopen-endedgiveawaysandsubsidiesinpower.Inahighlycapital-intensivesector,routinerevenueleakageinpowerdistribution,withthepowers thatbe ineffectprovidingpatronage forplaintheftofelectricity,wouldverilyshort-circuitthesystem.Itwouldguaranteepoorqualityofpower,which,inturn,wouldstultifygrowth.Source : ET Bureau, 19.9.2016

NEw TEChNOLOGy TO hELP ThERMAL POwER GENERATION COMPANIES quICKLy SwITCh SOuRCEA new technologywill enable thermal power plantstostartup inas littleasanhour,a fractionof the24hourscurrentlyneeded,allowingforgreaterintegration

ofrenewableenergysourcesinthenationalelectricityproductionsystem,whichnowrunsprimarilyoncoal.

Thermalplantsretrofittedwiththisequipmentcanstartgenerationassoonaspowerfromsolarunitsstartstoreducewithdecreasingsunlight,replacingitwithcoal-firedelectricity.Itwillbalancepowerflowintothenetworkandkeepitstable.Suchflexibilityisn’tpossiblenowsincethermalpowerplantsneed24hourstostartandcannotreplaceafallinsolargenerationatashortinterval.

Lastweek, IndiaPowerCorporation Ltd (IPCL) andGermany-basedUniper floatedanequal joint venturecompany, India Uniper Power Services, which willsource this proprietary technology fromUniper andoffer it to Indianplants. “It isbeingsuccessfullyusedatUniperpowerstationatRatcliffeintheUK.Ratcliffedailyusesstartandstopcyclesinresponsetorenewablegeneration. It iscommonlyusedacrossEUcountries,bothforcoalandgas-firedplants,”saidHemantKanoria,Chairman of IPCL. “The technology is a completeapproach involving upskilling of people,modificationof procedures, training,modification of systems andrigorousriskassessment.”

Thegovernmenthasseta100gigawattcapacityadditiontarget for solar power,which cannot yet be gainfullyused tosupplyelectricity to townsandcitiesbecausesuch plants cannot operate continuously. If stored inbatteries,solarpowerwillincreasecostsmanifoldandmakeituneconomical.TheCentralElectricityAuthorityandothergovernmentagencieshavebeenlookingforasolutionandthisnewtechnologycouldhelpatmarginaladditionalcost.

Analystssaidifthistechnologyissuccessfullyinstalledinexistingplants,electricityexchangescouldofferpowerinthehour-aheadmarket,dependingontheday’sdemandsurges.TradesinIndianpowerexchangesaresettledonadayaheadbasis-buyingandsellingcommitmentsaremadeadayearlierandpowerissuppliedthenextday.Thiscyclecouldbeboughtdowntoanhour.

“Itwillalsoallowidleplantstostartgenerationassoonastheyseeafallinsupplyorariseindemandduringaday.Atpresent,anumberofindependentpowerproducersareidlingtheirplantsduetolackofpowerdemand.Theseplantsgenerally startonlyafterdemandhasbeenontheriseforadayortwo.Withthistechnologyretrofitted,thiscyclecanshortenanditcanhelpthemgetrelativelybetterreturnsontheirinvestment,”saidananalyst.

An official fromNTPC said it needs to verify if thistechnologyworkswith equipment providedbyBharatHeavyElectricalsLtd.,whichhasbuiltamajorityof itsthermal powerplants.Kanoria of IPCLsaid it canberetrofittedonallplants,bothcoalandgasbased.Source : ET Bureau, 13.9.2016


International Council on Large Electric Systems (CIGRE)

International headquarters:InternationalCouncilonLargeElectricSystems(CIGRE),21Rued’Artois,75008Paris,FranceTel:+33 1 53 89 12 90; Fax:+33 1 53 89 12 99EmailofSecretaryGeneral:[email protected] of inception : CIGREwasfoundedin1921withitsHQatPARISAims and Objectives:CIGRE(InternationalCouncilonLargeElectricSystems)isoneoftheleadingworldwideOrganizationsonElectricPowerSystems,coveringtheirtechnical,economic,environmental,organisationalandregulatoryaspects.Apermanent,non-governmentalandnon-profitInternationalAssociation,basedinFrance,CIGREwasfoundedin1921andaimsto: • Facilitatetheexchangeofinformationbetweenengineeringpersonnelandspecialistsinallcountriesand

developknowledgeinpowersystems. • Addvaluetotheknowledgeandinformationexchangedbysynthesizingstate-of-the-artworldpractices. • Makemanagers,decision-makersandregulatorsawareofthesynthesisofCIGRE’swork,intheareaof

electricpower.More specifically, issues related to planningandoperationof power systems, aswell as design, construction,maintenanceanddisposalofHVequipmentandplantsareatthecoreofCIGRE’smission.Problemsrelatedtoprotectionofpowersystems,telecontrol,telecommunicationequipmentandinformationsystemsarealsopartofCIGRE’sareaofconcern.

Establishment of Indian Chapters: CIGREIndiawassetupassocietyon24.07.91withCBIPassecretariat.Membership: (I) CollectiveMembers(I)- (companiesofindustrialandcommercialnature) (II) CollectiveMembers(II)- (Universities,EngineeringColleges,TechnicalInstitutesandregulatory

commission) (III) IndividualMembers- (Intheengineering,teachingorresearchprofessionsaswellasofotherprofessionsinvolvedintheindustry

(Lawyers,economists,regulators...) (IV) YoungMembers(Below35YearsofAge)- (Intheengineering,teachingorresearchprofessionsaswellasofotherprofessionsinvolvedintheindustry

(Lawyers,economists,regulators...)

CIGRE - hq President Chairman TC Treasurer Secretary General RobSTEPHEN(SA) MarkWALDRON(UK) MichelAUGONNET(FR) PhilippeADAM(FR)

66


CHAIRMEN OF CIGRE NAtIONAl StuDY COMMIttEE (NSC)

2016 - 2018

S.K. Negi S.K. Soonee Oommen Chandy Seema Gupta MD, GETCO & Former CEO, POSOCO & ED, Powergrid & ED, Powergrid & Chairman CIGRE NSC C4 Chairman CIGRE NSC C5 Chairman CIGRE NSC B4 Chairman CIGRE NSC C1

Anish Anand Subhas Thakur R.K. Tyagi Deepal Shah AGM,Powergrid& AGM,NTPC AGM,Powergrid& Pfisterer Chairman CIGRE NSC C3 Chairman CIGRE NSC B5 Chairman CIGRE NSC A3 Chairman CIGRE NSC B1

K.V.S. Baba Subir Sen M. Vijayakumaran Prakash Nayak CEO, POSOCO & ED, Powergrid & MD, PENA Power E&A .& Chairman CIGRE NSC C2 Chairman CIGRE NSC C6 Chairman CIGRE NSC A2 Chairman CIGRE NSC D2

Jithin Sunder Gopal Ji D.K. Chaturvedi Rajil Srivastava ED, BHEL & Former GM, Powergrid & AGM, NTPC AGM, Powergrid & Chairman CIGRE NSC D1 Chairman CIGRE NSC B2 Chairman CIGRE NSC C6 Chairman CIGRE NSC B3


tHE COMMIttEE FOR INtERNAtIONAl COuNCIl ON lARGE ElECtRIC SYStEMS

(CIGRE) - INDIA

Governing Body of CIRGE - India

President Chairman – Technical Vice Chairman – Technical I.S.Jha R.P.Sasmal N.N.Misra CMD, POWERGRID Director, POWERGRID Former Director, NTPC

Vice President Vice President Secretary & Treasurer K.K.Sharma AmitabhMathur V.K.Kanjlia Director, NTPC Director, BHEL Secretary, CBIP

Director In charge P.P.Wahi Director, CBIP

india journalcigreindia.org/cigre january 2017.pdfcigre india journal volume 6, no. 1 january 2017...

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