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变压器局部放电定位的研究的中期报告 Abstract Partialdischarge(PD)isaphenomenonthatoccursininsulationmaterialsduetovoltagestresses.Itisamajorcauseoftransformerfailureandcancausesignificantdamagetotheinsulationsystem.Inthisstudy,weaimtoinvestigatethelocalizationofpartialdischargeintransformersusingacousticandelectricalmethods.Thismid-termreportpresentsourprogressinthestudy,includingliteraturereview,experimentalsetupandpreliminaryresults. Introduction Partialdischargeisalocalizedbreakdownoftheinsulationsystem,whichcanoccurintransformersduetoexcessivevoltagestresses.Itcanleadtodeteriorationoftheinsulationsystemandultimately,transformerfailure.Therefore,itiscriticaltodevelopmethodstoidentifyandlocalizepartialdischargeintransformerstotakepreventivemeasures. Acousticandelectricalmethodsarecommonlyusedtodetectandlocatepartialdischarge.Acousticmethodsarebasedonthedetectionofsoundwavesgeneratedbythedischargeinthetransformeroil,whileelectricalmethodsarebasedonthedetectionofelectromagneticfieldsgeneratedbythedischarge.Inthisstudy,weaimtoinvestigatethelocalizationofpartialdischargeintransformersusingbothacousticandelectricalmethods. LiteratureReview Theliteraturereviewfocusedonunderstandingthephenomenaofpartialdischargeandthemethodsusedtodetectandlocalizeit.Itwasfoundthatacousticandelectricalmethodsarecommonlyusedtodetectandlocalizepartialdischargeintransformers.Acousticmethodsarepreferredforhigh-voltagetransformersduetotheirnon-intrusivenature,whileelectricalmethodsarepreferredforlow-voltagetransformers. ExperimentalSetup Alaboratorysetupwasdevelopedtosimulatepartialdischargeinatransformer.Thesetupconsistsofatransformeroil-filledcontainerwithtwoelectrodes,whereahighvoltageof10kVwasappliedacrosstheelectrodes.Partialdischargewassimulatedusinganeedleelectrodeinsertedintotheoilatadistancefromthemainelectrode. PreliminaryResults Thepreliminaryresultsshowedthatbothacousticandelectricalmethodswereabletodetectpartialdischargeinthetransformeroil.Acousticmethodsshowedgreatersensitivitytothelocalizationofp