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简介：AccordingtothepowersystemplanninginChina,500kVtransmissionlinewillbethetrunksinallregionalnetworksexcepttheNorthwestChinaSystem.Duetoshortofcapitalresources,however,mostofthose500kVtransmissionlinesareandwillbeoperatinginsinglecircuitforquitealongpe-riodoftime.So,tousetheliveworkingtechniqueson500kVlinesisanimportantproblemforstudy.Actually,wehadalreadybegunourstudyonliveworkingon500kVtransmissionlineseveralyearspriortothePing-Wu

简介：<正>InOctoberofthisyear,adesignevaluationmeetingonfeasibilitystudyofUHVDCtransmissionprojectwaspresidedoverbytheStateGridCorporation.Itindicatesthatthecorporationmadeagreatprogressinthepre-engineeringworkofUHVDCtransmission.TheUHVDCtransmissionprojects,whichsendelectricityfromJinshaRiverPhaseI(XiluoduandXiangjiabahydropowerstations)totheCentralandEasternChinaandfromJinping

简介：ItisacommonpracticeinChinatouseaninsulatedsilkjacklad-derinthelive-lineworktoenterthe500kVEHVelectricfield.WuhanHighVoltageResearchInstitutehassuccessfullycarriedoutsuchoperatingperformanceatthemeetingofESMO-90inCanada.(Fig.1)Theoperatingprocedureisnowrecommendedasfollows.