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220kV(467001):220kV,。:;;:TM406:B:1001-8425(2009)11-0071-03Analysisof220kVTransformerFaultandItsTreatmentHANAi-zhi(PingdingshanPowerSupplyCompany,Pingdingshan467001,China)Abstract:Thereasonsofa220kVtransformerfaultareanalyzed.Thetreatmentisintro-duced.Keywords:Transformer;Faultanalysis;Treatment1。,,,。,,。、。22001628,,220kVB1,,35kV。,35kV,,A、B、C1、6、4。B1SFPSZ7-120000/220,(220±8×1.25%)kV/121kV/38.5kV,YNyn0yn0d11(,。,,,,)。199111,19928。B1,,2001626,,1。1,、,102,。B1,C12001-06-2625.349.67.7025.4990.85722.582.72001-06-2938.265.69.325.4126.3999.85993.0138.52001-06-2932.856.28.519.186.8893.35176.8116.6/μL·L-1Table1Contentsofdissolvedgassesinoilinmaintransformer4611200911TRANSFORMERVol.46NovemberNo.11200946,,。B12。2,ao、bo、co11.9%,2%,。,B114,ao、bo,0.3196Ω,2co,13,1。B125335.9pF32110pF,26.7%;34600pF48400pF,39.9%。,。3,B1,c。,,,。c、,0.02548Ω,2co;,c、(、),c0.02518Ω,2co。,c。B11,3。3,,。B1,。4,,,、。、,,,,,c1。23。2,a、b,c;3,c1,。B1、,。,75℃,;80℃~85℃。B120,、,B1。2Table2TestedDCresistancesofLVwindinginmaintransformeraoboco/%/Ω0.022850.022810.0256411.9ocba21376851Fig.1TestdiagramofLVwinding6、7、8—;a、b、c、o—;1、2—;3、5—;1-3、2-5—。3cTable3MeasurementofDCresistanceinphasecofLVwindinginmaintransformerC1-c=0.000084Ω,3、1-3C2-o=0.000299Ω,5、2-5C1-2=0.02518Ω1c,(a)a72220kV115220kV,35kV,,,,35kV。635kV,9~17,35kV1~3,35kV。B190220kV,、,,,35kV,,,,(35kV,)35kV,,,,B1。6B1,,。,35kV,,35kV,11,1.2,9~17。35kV,,,。:[1].[J].,2003,40(4):8-12.[2].[M].:,1994.[3]DL/T596-1996,[S].(b)b(c)c2Fig.2DeformationofthreephasesofLVwindingintransformer3cFig.3Windinginphasec:2009-05-20:(1966-),,,,。!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!750kV722,750kV,750kV,750kV,750kV,。750kV,。LDICLDC-7/UHF,61750kV,、,。73
本文标题:一台220kV变压器故障原因分析与处理
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