(530023):220kV,。:;;:TM406:B:1001-8425(2009)11-0044-04DiscussiononCapacitanceandDielectricDissipationFactorTestMethodforCapacitorVoltageTransformerLIUHui(GuangxiPowerGridCompany,Nanning530023,China)Abstract:Basedontheexampleof220kVcapacitorvoltagetransformer,thetestmethodsofdielectricdissipationfactorandcapacitancearesummarized.Keywords:Capacitorvoltagetransformer;Capacitance;Dielectricdisspationfactor1(CVT),,。220kV(1),。,,,。2AI-6000。2.1C11C11,(δ、X,),1。1220kVFig.1Connectiondiagramof220kVcapacitorvoltagetransformerC1—;C11—,;C12—,;C2—,C12;YH—;A—CVT;A′—;A1—,;δ—,;X—。AA1A′C1C12C2δXKLYHZKZa1x1a2x2afxfRPC11Za1x1a2x2afxfC11C12AA′C1C2XKYHZKRPLZC11C12AA′C1C2KYHZKRPLa1x1a2x2afxf(a)A1,X(b)A1,X(c)A1,Xδδ4611200911TRANSFORMERVol.46NovemberNo.112009112.2C12C12,2。2.3C2C2,3。2.4(C12C2),4。2.5C2CVT,ωL=1ω(C1+C2),ωL。C2,C2,1ωC2ωL,。。220kV、330kV、500kVCVT,C21ωC2ωL,,。C2,、、,,。3,CVT,X,A1。A1(X),C12C2,。3.1C12C2C12,1C11Table1MeasuringmethodofC11CVTA()A()A11.:A,A′。2.:A′,A。3.:A,A′。4.:A′,A,A1。:A′,A,A1。A11.:A,A′。2.:A′,A。3.:A,A′。()2C12Table2MeasuringmethodofC12CVTA()A()A11.:A1,A′,δ、X,、。2.:A′,A1,X,(),δ。3.:A′,A1。4.:A′、δ,X,、。1.:A1,A′,δ、X,、。2.:A′,A1,X,(),δ。3.:A′、δ,X,、。A1:A′、δ,X,、。:A′、δ,X,、。3C2Table3MeasuringmethodofC2CVTA()()A11.:A1,δ,X,、。2.:A1,δ,X,、。3.:A1、X,δ,、。4.:δ,A1,X,()。5.:A′、δ,X,、(:A,C11C12,)。A1:A′、δ,X,、(:A,C11C12,)。CVTA()()X1.:A′,δ,X,()。2.:A′,δ,X,()。3.C12C2,。XC12C2,。4Table4Measuringmethodoflowercapacitor4546δδ,,。,C2δR,δ,Cn,,1/(ωRC2)。C2,C2δ,,,,,。3.2(C12C2),2,2CH。,CH(),(2%),CHC2,C2,C2C12。3.3(C12C2),3,CH。,,4,C12=C′12+C″12,C′12/C2≈C″12/CH。,CH,C″12C12,C12C′12,C′12C2,。3.4,,、C2、、,,。,A1(X)CVT,(、、),。,、。55,。1CVT,;()。2CVT,;()。3CVT,;()。45CVT,,,。4(1)220kVCTV,,,CVT。(2)CVTC2,“”“”,,,C2。(3)CVT,(、、),。HVAI-6000CXC2C12A1CH2Fig.2MeasurementoflowercapacitorwithreverseconnectionmethodHVAI-6000CXC12C2CHA13Fig.3MeasurementoflowercapacitorwithforwardconnectionmethodC12C2A1CHC′12C2A1GCHC″12C′12C″12CHA1C2(a)(b)(c)4Fig.4Equivalentdecompositionwithvirtualbridge4611,、。(4),A1X,。(5)CVT,,。:[1].[J].,2002,(4):35-42.5Table5ComparisonandanalysislistoftestedresultsCVTC12C2C12C2C12C21(TYD110/3姨-0.02H,,)0.053%;29580pF0.051%;64330pF0.052%;20263pF—()0.053%;29530pF0.049%;64240pF0.052%;20230pF0.044%;20220pF()———0.028%;20050pF2(TYD2220/3姨-0.005H,,)0.085%;12190pF0.085%;48230pF0.085%;9731pF—0.107%;12180pF0.096%;48130pF0.105%;9732pF0.090%;9660pF0.100%;12210pF——0.097%;9770pF(2801)0.094%;12210pF0.087%;48260pF0.093%;9745pF0.092%;9720pF3(TYD2500/3姨-0.005H,,)0.396%;18530pF0.045%;99920pF0.341%;15631pF—()———0.223%;15560pF()———0.237%;15670pF()0253%;18530pF0.049%;99800pF0.221%;15628pF0.227%;15620pF4(TYD110/3姨-0.01H,,)———0.042%;9971pF———0.034%;9988pF———0.057%;10080pF5(TYD110/3姨-0.015H,,)———0.045%;14810pF———0.041%;14830pF———0.062%;15020pF:2008-11-25:(1965-),,,,。姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨姨1000kV750kV“”60、“”。--1000kV、750kV,。“”11。:;;,,。:“,”。,,、、、,。750kV750kV。,、100%。728,,,,。“”,10kV,。,、、,,,。47