电阻分压式电子式电压互感器的研究

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1,1,1,1,1,2(6100392.611741):、,。:;;:TM451:B:1001-8425(2010)04-0018-05ResearchonElectronicVoltageTransformerBasedonResistorDividerRENXiao1,FANGChun蛳en1,LIWei1,YUJian蛳hua1,MUXiu蛳qing1,HOUXiang蛳yu2(1.XihuaUniversity,Chengdu610039,China;2.SichuanTaikeElectricApparatusCo.,Ltd.,Chengdu611741,China)Abstract:Theprincipleandthestructuraldesignofelectronicvoltagetransformerbasedonresistordividerarepresented.Theprototypeisdevelopedandtested.Keywords:Resistordivider;Electronicvoltagetransformer;Electricfielddistribution:(07ZA1087);(XZD0819-09)(EVT)、、、,、。,、。,,、、。,。100V100/3姨V,,、。,,,。、。、,。,l0kVEVT,GB/T20840.7-2007,0.2。l0kVEVT1。EVT、。R1、R1R21EVT()Fig.1DiagramofEVTTRANSFORMERVol.47AprilNo.42010、、R2,R2,。,。,,。、,、,GB/T20840.7-2007。3.1EVT。2。3.2EVT1。3.3,,,。,,(r,φ,z),r,z,EVT、,。、。1/2。,:1r坠坠r(r坠φ坠r)+坠2φ坠r2z=0(1)、:φ1=φ2ε0坠φ1坠n=ε1坠φ2坠nnnnnnnnnn(2)ε0———ε1———n———,。:φ|h=10(3)φ|h———EVT:φ|l=0(4)φ|l———EVT()()3.4、、、,、、,。(a);(b)。、3。3a3b,,。3a,,,,,,3b,、,,。,1234556672EVT()Fig.2DiagramofEVT1—;2—;3—;4—;5—;6—;7—。1EVTTable1MaterialcharacteristicsofEVT/S·m-1R21.231×10-215.8×10713.91×10-131.00060R112.321×10-519(b)。4(b)EVT,EVT,,。EVT5。、6。,EVT,2.6175×105V/m,10kV(20~35)×105V/m。,,,、,、,。4.110kV3.25V。0.05,(a)(b)3Fig.3Fielddistributiondiagraminresistordivider4Fig.4Distributiondiagramofelectricfluxlineindivider5Fig.5Distributiondiagramofpotentialindivider0200040006000800010000204060801001201401601806Fig.6Distributiondiagramofpotentialinresistor20、、EVT、、,、,7。,(80%~120%)Ue,0.1%,≤5′;2%Ue,1%,50′;5%Ue、190%Ue,0.5%,120′。IEC60044-70.23P。4.2EVT。+45℃-5℃,+45℃-5℃,4。8。,,GB/T20840.7-20070.2。4.3(1)。EVT42kV,60s,,。(2)。EVT75kV、15,。86kV3,。。(3)。34kV,60s,8.3kV,≤20pC。7pC。(1),GB/T20840.7-20070.2。(2),,,,。。(3),,、、,,,,EVT。:[1],,.[J].,2007,8(1):103-104.[2],,.[J].,2000,24(1):38-41.[3],.[J].,1998,24(2):70-72,7.[4]NishiyamaE,KuwanamiK,KawanoM,etal.Elec-tronicinstrumenttransformersforintegratedsubstationsystems[J].TransmissionandDistributionConferenceandExhibition,2002:459-464.[5]SaitohM,KishimotoK,KosakadaM.Developmentoftheelectronicinstrumenttransformersforintelligentsubsta-tion[J].TMT&DRev.,2003(1):1-6.190120100805-0.3-0.2-0.100.10.20.5Ue/%/%-100102030190120100805Ue/%/(′)710kVEVTFig.7Testedcurvesofaccuracyof10kVEVT/%190120100805Ue/%-5℃45℃-0.4-0.200.20.4/(′)0246190120100805Ue/%-5℃45℃810kVEVTFig.8Curvesoftemperatureandaccuracyof10kVEVT(24)21N1e、N2eU20N2e=f2(β)1801601401201008060402000.00.20.40.60.81.01.21.41.61.82.0N1e=f1(β)U20=f3(β)β/(°)3N1e=f1(β)、N2e=f2(β)、U20=f3(β)Fig.3CurvesduringN1e=f1(β),N2e=f2(β)andU20=f3(β)1Table1CalculateddataβU200°0.005U130°0.258U1240°N1e1.7321.9320N2e00.51761.732U2000.2679U1∞60°0.489U12.01.00.5U190°1.9321.4140.732U10.724U1120°1.7321.732U10.99U1150°1.5681.9321.366U11.357U1180°1.02.02U1:0~150°210°0.51761.9323.732U1:。3.1(3)βU20U1,1。1β=0°~180°U20f(β)3。3。,β=0°~150°。β150°,β150°。3.23,U1,、,,N1eβ=0°~180°。0°β60°,N1eβ,I0P0;β60°,β,N1e;β150°,N1e,、。,I0P0,,β=240°U20=∞。β150°。,β180°。、、,。:[1],.[M].:,1984.[2].[J].,2005,42(7):5-9.:2009-04-01:(1942-),,,、,、,。(21)[6]GrossR,HerrmannJ,WacheM,etal.Substationcontrolandprotectionsystemsfornovelsensors[C].CI-GRE2002:1-9.[7],,,.l0kV[J].,2007,22(5):58-63[8],.[M].:,1996.[9]GB1207-2006,[S].[10]GB/T20840.7-2007,7:[S].:2009-12-02:(1976-),,,,;(1975-),,,,。!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!24

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