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简介：±５００ＫＶＨＶＤＣＴｒａｎｓｍｉｓｓｉｏｎｐｒｏｊｅｃｔｆｒｏｍＴｉａｎｓｈｅｎｇｑｉａｏｔｏＧｕａｎｇｚｈｏｕＬｉＬｉｃｈｅｎｇ，ＰｅｎｇＢａｏｓｈｕ，ＹｕＪｉａｎｇｕｏ，ＷｕＺｅｈｕｉＰｏｗｅｒＮｅｔｗｏｒｋ，ＣｏｎｓｔｒｕｃｔｉｏｎＤｅｐａｒ...

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

简介：Thestrengthofthepowerfrequencyelectricintensityandmagneticfieldofthe500-kVdoublecircuittransmissionlineswascalculatedbyusingtheequivalentchargemethodandtheAmpere'sLaw,andtheenvironmentalimpactfactorsofthefieldswereevaluated.Byoptimizingthephasesequence,thefrequencyelectricintensityandmagneticfieldstrengthcanbereduced.Withinadistanceof25mfromthecenterofthetransmissionline,thepowerfrequencyelectricintensityandmagneticfieldstrengthfalloffsharplywiththedistanceincrease.Finally,thebestphasesequenceandtheminimumgroundclearanceofthetransmissionlineswereobtainedtomeettherequirementsoftheleastimpactonenvionment.

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

简介：DuringtwoyearsoddperiodfromDec.1987toFeb.1990,therehadbeenrepeatedlypollution-flashoverfailuresonour500kVtransmissionlines,resultinginawidescopeblackout.Therewereeleven500kVlinesaltogetherinNorth-east,EastandNorthChinapowergrids,wherepollution-flashoverfailureshappenedoneafteranotheron36transmissionlinetowers(poles).Since500kVtransmissionlinesarethemaintrunksofhighvoltage

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简介：本文介绍中国第一条从北京房山变电站至昌平变电站全长８３公里的５００ｋＶ紧凑型输电线路在投运前、后所做的多次试验的情况。试验结果表明所有电气参数完全符合设计要求。

简介：OnOctober12thisyear,thecontractsoftheprocurementontheconverterstationequipmentforThreeGorges-GuangdongandGuizhou-Guangdong±500kVDCtransmissionprojects,know-howtransferandthesubcontractsonequipmentmanufacturinghasbeensigned.Theconstructionscaleofthetwoprojectsis