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1,2(1.4500522.472000):,。:;;;:TM406:B:1001-8425(2009)10-0058-05FaultAnalysisofWireClipHeatinginNeutralPointLoopofMainTransformerZHAOXue-yan1,ZHANGZe-hui2(1.HenanElectricPowerCompany,Zhengzhou450052,China;2.SanmenxiaPowerSupplyCompany,Sanmenxia472000,China)Abstract:Thereasonsofwireclipheatinginneutralpointloopandthehazardofneutralpointdirectearthareanalyzed.Thesuggestionsarepresented.Keywords:Transformer;Neutralpointloop;Wireclip;Heating1,,,;,,。、。,()。,,(110kV);,,,,。,110kV。,,、、、、。22007829,220kV23,1110kV(),,39℃,,23℃。8307、9,38℃,。10,112℃,,,19℃。(,,1、,2、)。1110kV,,。1。200783110,,,213℃,(1),,,1。2110kV,4610200910TRANSFORMERVol.46OctoberNo.102009、10,,33℃(19℃)。1,,,2。2a,,。2b,,。,,。1,,。,1、,2、。,,,。3(1),,,。2,,,,,,,,,,。(2),。2,(2mm),,,,,(),。(3),,。110kV,,110kV,。1110kV,,。(4),。、、,。(5)、,。、,,、、1/℃/℃120070829232339220070830072038()32007083009213942007083010211125200708302119386200708302319387200708310718398200708311019213Table1Temperaturedata1Fig.1Burnoutwireclip(a)(b)2Fig.2Burnoutwireclipandearthbrakeplate5946,,,。(6),。,,39℃,200℃。4(1):220kV,、,。1、,2、,110kV7。7,110kV。3。31GD1、1GD2,2GD1、2GD2。3110kV,(1GD2)。:1、(LP1),、(LP2);2、,、。110kV4。(2)110kV。110kV,110kV,,()。,110kV,,,。。①。,(、),,110kV。,,,。②。,,,(),,110kV,110kV,,,110kV。,1,2()2,1,1。110kV,,。,,。(3)110kV。,110kV,,110kV,,,,②。,,110kV,110kV。5(1),,3110kVFig.3Connectiondiagramof110kVsystem110kV220kV220kV220kV211GD11GD22GD12GD2110kV110kV110kV110kV110kV110kV110kV110kV1234568760、10,,,。。(2),,CT(),,。(3),,,(),,,。,,。(4),。,。(5),,,。(6),,,,。(7),,。,,,。,,。,2。2,,5m。,,39℃,。,。,,,,。(8)200755,220kV1110kV。,83℃102℃,。,,,67.5ms。,,。,。,,220kV11GD11GD2110kV110kV110kV3U00.5S0.5S0.5S1.0S3.2SI0″I0′I0′≥1LP1UccUccLP2&&&&110kV110kV4110kVFig.4Diagramofzero-sequenceprotectionof110kVsiedinmaintransformer2/m0.51.15235/℃2624091686340/℃2424242424Table2Datameasuredwithpointthermometer611,,,。,,,,。2【1】2006322,110kV2(,110kV/35kV/10kV)。,,CT::IAH=0.6A242°,IBH=0.6A121°,ICH=0.6A2°:IAM=0.2A57°,IBM=0.2A298°,ICM=0.2A177°,,(462000):,。:;;:TM406:B:1001-8425(2009)10-0062-03AnalysisofWrongConnectionofSecondaryCircuitinMainTransformerDifferentialProtectionYUANZheng-hua,LIZhen-hai,LIUXiao-yan(LuohePowerSupplyCompany,Luohe462000,China)Abstract:Thecommonwrongconnectionsinmaintransformerdifferentialprotectionareanalyzed.Thecorrectionmeasuresarepresented.Keywords:Transformer;Differentialprotection;Analysis4610200910TRANSFORMERVol.46OctoberNo.102009,。6,,,,;,;,,。:2008-09-04:(1977-),,,,;(1965-),,,,。!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
本文标题:主变中性点回路线夹发热引起的故障分析
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