预览加载中，请您耐心等待几秒...

基于去极化电流Prony拟合的油纸绝缘德拜参数辨识方法.docx

预览
1/2
2/2

在线预览结束，喜欢就下载吧，查找使用更方便

下载提示 文本预览

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

基于去极化电流Prony拟合的油纸绝缘德拜参数辨识方法 Title:IdentificationMethodofOil-paperInsulationDissipationParametersBasedonPronyFittingofDepolarizationCurrent Abstract: Oil-paperinsulationiscommonlyusedinpowertransformerstoprovideelectricalinsulationandmechanicalsupport.Theconditionofthisinsulationiscrucialtotheoverallsafetyandreliabilityofthetransformer.Toaccuratelyevaluatethehealthofoil-paperinsulation,itisessentialtoidentifythedissipationparameterscharacterizingitscondition.Thispaperpresentsanovelmethodforidentifyingthedissipationparametersofoil-paperinsulationbasedonPronyfittingofdepolarizationcurrent. 1.Introduction: Oil-paperinsulationdegradationisacommonprobleminpowertransformers,whichcanleadtopartialdischarges,overheating,andeventuallyfailure.Thedissipationparameters,suchastherelaxationtimeconstantandtheequivalentresistivity,arecrucialindicatorsofinsulationdegradation.However,accuratelydeterminingtheseparametershasbeenachallengingtask.ThispaperproposesanovelmethodthatutilizesthePronyfittingtechniquetoidentifytheseparametersbasedontheanalysisofthedepolarizationcurrent. 2.DepolarizationCurrentandPronyAnalysis: Depolarizationcurrentisthecurrentgeneratedbythereleaseoftrappedchargesinoil-paperinsulationwhensubjectedtoanappliedvoltage.Itisadirectindicatoroftheinsulationconditionandcontainsvaluableinformationaboutthedissipationparameters.Pronyanalysisisatechniqueusedtodecomposeatime-domainsignalintoasumofexponentialfunctionsthatcanrepresentrelaxationprocesses.ByapplyingPronyanalysistodepolarizationcurrent,therelaxationtimeconstantandequivalentresistivitycanbeobtained. 3.Methodology: Theproposedmethodinvolvesthefollowingsteps: a.Measurementofdepolarizationcurrent:Thedepolarizationcurrentismeasuredusingaspeciallydesignedsetup,includingastepvoltagesourceandadataacquisitionsystem. b.Preprocessingofthedepolarizationcurrent:Themeasureddepolarizationcurrentispreprocessedtoremovenoiseandunwantedhigh-frequencycomponents,ensuringaccurateanalysis. c.DecompositionusingPronyanalysis:Thepreprocesse