(李军浩 电工电能新技术) 温度对油纸绝缘扁平气隙缺陷局部放电特性的影响_英文_.pdf

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1、第28卷第1期电工电能新技术Vol.28,No.12009年1月AdvancedTechnologyofElectricalEngineeringandEnergyJan.2009InfluenceofTemperatureonPartialDischargePropertiesinDisc2voidofOilPpressboardInsulation(温度对油纸绝缘扁平气隙缺陷局部放电特性的影响)LIJun2hao(李军浩),SIWen2rong,YAOXiu,GUOZhi2feng,LIYan2ming(StateKeyLab.ofElec

2、tricalInsulationandPowerEquipment,Xi’anJiaotongUniversity,Xi’an710049,China)Abstract:PartialdischargebasedriskassessmentmethodhasrapidlydevelopedasaneffectivediagnosismethodinoilPpressboardinsulationsystem.Thetemperatureinfieldpowertransformerisvariableaccordingtoloadingandt

3、hePDpropertiesininsulationarealsovariableindifferenttemperature.InordertoassesstheinfluenceoftemperatureonpartialdischargepropertiesinoilPpressboardinsulationsystem,apartialdischargetestingsystemwithtemperatureadjustingfunctionwasadoptedinthispaper.Thepartialdischargedataobt

4、ainedfromtheexperimentalworkwerepresentedinphase2resolvedPD(PRPD)patternanalysisandpulsesequenceanalysis(PSA).Thesinglepulseintimedomainatdifferenttemperatureisalsoanalysedinthispaper.Keywords:partialdischarge;oilPpressboardinsulation;temperature;pulsesequenceanalysis中图分类号:T

5、M83514文献标识码:A文章编号:100323076(2009)0120034204defecttypeanddefectlocationhavebeenstudiedbylots1Introduction[4,5]ofworkers.ButoverloadingatransformermaycauseCelluloseandhydrocarbonoilhavebeenusedastheinsulationsystemtobeexposedtoasufficientlyhightransformerinsulationformanyyears

6、,andthelifeofaamountofheatgeneratedinthetransformer.Althoughthetransformerisultimatelydeterminedbythesolidinsulationpreviousinvestigationshavecontributedmuchknowledgesuchascellulosepressboard,althoughotherfactorsmayintermsofPDcharacteristicsunderhightemperaturecauseittofaile

7、arly.Cellulosepressboardhasbeenconditionsbutmostofthestudieshavebeenconcernedprovedtohavedesirableelectrical,chemicalandphysicalwithsolidinsulationmaterials,suchasepoxyresinsand[1][628]propertiesanditalsohaslowcost.Thestablepolymerinsulation.quasipermanentcavitieswillocclude

8、withinthesolidInordertounderstandtheinfluenceoftemperatureinsulatingsystems