一起220kV变压器雷击故障分析与处理

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220kV,(277100):220kV,。:;;:TM406:B:1001-8425(2010)11-0068-04AnalysisandTreatmentof220kVTransformerLightningImpulseFaultLIUQing,SUNZhong-kai(ZaozhuangElectricPowerSupplyCompany,Zaozhuang277100,China)Abstract:Thereasonsof220kVtransformerlightningimpulsefaultareanalyzed.Thetreatmentisintroduced.Keywords:Transformer;Lightningimpulsefault;Winding1,,,。,,。。22008712,,220kV2,。35kV35kV,,,A1、B6、C4。2SFPSZ7-150000/220,(230±8×1.25%)kV/121kV/38.5kV,YNyn0d11(,,,,)。19971,199712。2,,200872,,1。2。12,、,122,。2,b,,、1Table1Dissolvedgascontentsinoilbeforeandaftertransformerfault2008-07-024.46661401171324184.52008-07-12207.72346.4212.7261.9258145711059828.75/μL·L-1TRANSFORMER4711201011Vol.47NovemberNo.112010、220kV114cTable4DCresistancetestinphasecofLVwindinginmaintransformerB1-b=0.000081Ω,3、1-3。B2-0=0.000256Ω,5、2-5。B1-2=0.01748Ω1c,。;;。23,。3,ao、bo、co16%,2%,。,216,ao、co,0.2149Ω,3bo,13,。227090pF33520pF,23.7%;35400pF49200pF,39%。,。3,2,b。,,,。b、,0.01779Ω3bo;,c、(、),b0.01748Ω,3bo。,b。21,4。4,,。2,。4,,,、。、,,,,,b1。23。2,a、c,b;b4。3,b2008-07-121335.51957.2883.141153.6315611528193529.57/μL·L-12Table2Gascontentsoffaulttransformer3Table3DataofDCresistancesofLVwindingintransformerao/Ωbo/Ωco/Ω/%0.015390.017920.01532160.015060.015090.015040.33abco12357686、7、8—;a、b、c、o—;1、2—;3、5—;1-3、2-5—。1Fig.1DiagramofLVwindingtest6947-10-20-30-40-5001002003004005006007008009001000/dB/kHz5bFig.5Waveformofdeformationafterrepairofwindinginphaseb,。2、,。,75℃,;80℃~85℃。2,、,。b,5。24h、4、10,5。5220kV,35kV,,(a)a(b)c(c)b2Fig.2DeformationofthreephasesofLVwindingoftransformer3bFig.3Windinginphaseb(a)20100-10-20-30-40/dB101092083074065057038029011000604/kHz0-10-20-30-40-50-60-7001002003004005006007008009001000/kHz(b)/dB4bFig.4Waveformofdeformationbeforeandafterfaultofwindinginphaseb70、220kV11,,35kV。635kV,9~17,35kV1~3,35kV。21997220kV,、,,,35kV,35kV。,(35kV,)35kV,,,,2。6,,。“S”、,;;;,,;;、,,,。:;,,,(2),,;10A10kV30A35kV,,。,,,,,、,,(RTV),;。:;。。72,,。,35kV,11,1.2,9~17。35kV,,,。:[1],.[J].,1997,34(10):12-17.[2].[M].:,1994.[3]DL/T596-1996,[S].[4],,,.[J].,2000,33(12):39-42.2008-09-272.111.12007141303.23242008-09-302.651.121.1209252424.8942008-10-063.11.680.53010216805.31102008-10-263.741.21.27010.2372606.2130/μL·L-15Table5Dissolvedgascontentsinoilafteroperarionoftransformer:2010-01-15:(1963-),,,,。71

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