1,2,1,3(1.4500522.4500523.110025):,、。:;;:TM406:B:1001-8425(2009)06-0064-04DiscussiononEarthingModesofHighVoltageBushingEndShieldinPowerTransformerHANJin-hua1,ZHANGJian-zhuang2,WANGWei1,YANGYan3(1.HenanElectricPowerInstitute,Zhengzhou450052,China;2.HenanElectricPowerCompany,Zhenzhou450052,China;3.TBEAShenyangTransformerGroupCo.,Ltd.,Shenyang110025,China)Abstract:Theearthingmodesofhighvoltagebushingendshieldinpowertransformerareanalyzed.Theproblemsinoperationandmaintenancearepresented.Keywords:Powertransformer;Highvoltagebushing;Endshield120089,1330kV,330kVB、,,,。9,,。,220kV800。,、,。2、。2.1()(),,、(),1。2.2(、)(a)(b)46620096TRANSFORMERVol.46JuneNo.62009、、6,,,,。,23。2.3,,,。,,,4。56,。33.1,。:(),,;;(1c),(c)1Fig.1Externalearthmode(a)(b)2Fig.2Connectionbetweenleadwirepoleandearthcapbyspringlamination(a)(b)3Fig.3DirectionconnectionbetweenleadwirepoleandearthcapΦ44Fig.4Earthprincipleofspringearthsleeve5Fig.5Springearthinoperation6Fig.6Testingorabnormalspring6546。3.2,,。,:,,;。3.3,,,Φ4,,。,,。,。,,。44.1,,,。,;,;,;。4.2,,,、;,。,,,,。4.3,,。,,。,;,;。,。4.4,。,。,:;,。5【】110kVBRLW-110/630-4,,A。A57℃,BC46℃,27℃,46℃,7。,A,24.3μL/L,2、1、0,。,,0.15pF,350pF,,“、”。,(8)。,1.0mm2,。,“”,,。【】220kVCOT1050-800,(9)。C,3.3kV(16.4kV),7Fig.7Thermalinfrareddiagramofbushingseat66、、68Fig.8BreakingwireofbushingendC,5000pC1300pC,、。,B(),。,C,B,C,B,,C。B,,。6、,,。、,。、;;,,,,;,,。、,,。、,。、,。380VBPZK2ADC2P.DcbaBABCOCmBmAmOZK1P.DC19Fig.9ConnectioncircuitofPDtestBP—P.D—C1、C2—ZK1、ZK2—B—D—:2008-08-30:(1974-),,,,。“”,,,《》,,200910“”。,(、、)。:1.、;2.;3.;4.;5.;6.;7.、;8.;9.;10.;11.750kV、±800kV、1000kV。2009920。,“”。“《》”。。,。,,《》。《》!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!67