28120112开关柜局部放电暂态对地电压检测技术徐 焰1,2(1., 200092;2., 200072) :。(TEV),,。、。。:;;(TEV):TM591 :B :1006-6357(2011)01-3TransientEarthVoltageInspectionTechnologyforPartialDischargeofSwitchCabinetXuYan1,2(1.TongjiUniversity,Shanghai200092,ShanghaiChina;2.ShibeiPowerSupplyCompany,SMEPC,Shanghai200072,ShanghaiChina)Abstract:Traditionalinspectingtechnologiescannotfindoperatingsituationofdeviceinsidecabinetthatisthecharacteristicofmetalarmoredswitchcabinet.Onthefoundationoftheprincipleoftransientearthvoltage(TEV)producedbygroundinsulationpartialdischargefrommetalarmoredswitchcabinet,tosupervisethepartialdischargeisaneffectivemethod.Specificinspectingprincipleofthetechnology,diagnosismethodandjudgingevidenceareelaborated.ThetechnologyhasbeenproveditseffectivenessbyapplyingintoShanghaipowernetwork.Keywords:metalarmoredswitchcabinet;partialdischarge;transientearthvoltage(TEV) 、。,,,,。,,,。,,。(TEV)。。1 TEV,,(),()。,,。,。,、、、。,,。(,),。TEV“dB”。,,,,62 :;,,,。,TEV。2 2.1 1)。,,。,,。2)。(、),,。2.2 ,TEV,,,,;,。2.3 TEV,。TEVPDL11。3 ,TEVPDL1,。3.1 ()PDL135kV()36dB(1 PDL1PDL1/dB 0 ;(GIS)0~10 ;110kV,10~20 ;35kV,20~30 ;10kV,;10kV35kV30~40 10kV,10kV40~50 10kV,50~60 ,;,10dB),,、。PDL1,42dB(35~38dB),。,。3.2 ()PDL110kVC-GIS,128dB,()7dB。,,26dB,20dB,10dB,。,。4 (TEV)、,,、,,。TEV63 :,、,。[1] .[J].,2005(8).[2] ,, ,.[J].,2010(4).[3] , ,.[J].,2009(3).:20111 (1980-),,,(上接第51页)。,。,。3)。,。,“”,;,。4)。“”,“”。,“”,“”。4 1),。,,。2),。3),、、,±0.5℃。4)15min,15min,“”,。5),,,、,。,3498。,,,。5 1),,。2),,,。[1] .DL/T1102—2009[S].:,2009.[2] MarkBally, .[J].,2009,(9).[3] .[J].,2009,(9).:201012 (1974-),,,,、 (1983-),,,、;、64