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1、简单讲述互感器的故障分析与诊断（Briefanalysisoftransformerfaultanalysisanddiagnosis）[transformertradingnetwork]XiaoBian:Transformervoltamperecharacteristictestinstrumentfortransformerstatusidentificationisbasedonthepreviousmethodsdescribedinthearticletotesttheexperimentaldataobtained.Byt
2、hetestdata,wemustfirstdeterminethecorrectnessoftestresults,excludingtheimpacttestmethodontheprincipleoferrorandenvironmentalandhumanfactors;andthenthetestresultsandtheregulationsandstandardsofcomparison,comparedwithhistoricaldata,comparedwithothersimilarproducts,thetestda
3、taoftheintegrateduseofmultipletestmethodsjointanalysis;accordingtothestateanalysisofthetransformertojudge.Typesandanalysisoftransformerfaults1、insulationstructure35kVandabovevoltageclasstransformersareusuallyoilpaperinsulationstructures.Themaininsulationstructureofthe220k
4、Vvoltageclasstransformerisacapacitivestructure,thatis,acapacitorcorecomposedofaseriesofcapacitivescreens.Thecapacitancescreenismadeofaluminumfoilorsemiconductorpaper,andthecablepaperiscontinuouslywoundtoformaninterscreeninsulation,andtheendofthemainscreenofthecapacitances
5、creenisprovidedwithanauxiliaryscreentoimprovetheendelectricfield,andthecapacitorcoreisassembledintheporcelainsleeveaftervacuumdryingtreatment.2,thecauseofthefailure2.1insulationthermalbreakdownThehighvoltagecurrenttransformernotonlywithstandsthehighvoltage,butalsocausesth
6、einsulationtemperaturetorisebythelargecurrent,thedielectriclossoftheinsulatingmediumundertheactionofhighvoltage,andthethermaleffectofthecurrent.Ifthereisadefect,therewillbeanincreaseinheatloss,insulationtemperaturerise,thelongerthantheinsulationmaterialoperatingtemperatur
7、e,willcauseinsulationthermalbreakdown.2.2partialdischargedamage220kVcurrenttransformermaincapacitorvoltageinthenormalstateunderuniformdistribution,iftheproductionprocessisnotqualified,itwillcausethecapacitorisnotsmooth,elasticinsulationwrappingandtightloose,wrinkledpaperl
8、attice,capacitivescreendislocation,fracture,andleginjuryduetoinsulationdefects;thelowerpartofthe
