220kV线路融冰方案的改进.pdf

32! 4" #$%& Vol. 32 No. 4 2008'2( PowerSystemTechnology !"#$1000-3673%2008&04-0029-02 '()*#$TM852 +,-.$A /01.$470·4037 220kV23456789: !"#$%"& '"()*"+,-"./0 !"#$%&'()!"*411102+ ImprovementonIce-MeltingSchemefor220kVTransmissionLine DENGJian )XIAOShun-liang )YAOPu )GUOZheng-hui )WUXiao-yong )HEWei-ming *XiangtanPower SupplyBureau)Xiangtan411102)Hunan Province)China+ ABSTRACT: InJanuary,2008severeiceandsnowdisaster occurredinHunanprovinceandothersouthernandcentral provincesofChinaandthisdisastermade220kVtransmission linesseriouslycoveredwithice,however,undersuchasevere disasteritwashardtoadopt the traditionalice-meltingscheme for220kVlines,.,multi220kVtransmissionlinesare connectedinseriesandtheendingterminalofthefinallineis artificiallythree-phaseshort-circuited,thenthree-phase110kV ACvoltageisappliedtothebeginningterminalof the first line reason,aftertheanalysisontheproblemsencounteredin applyingabove-mentionedice-meltingmethodtoactual application,anewice-meltingscheme,namelyusinglower voltageclasstoimplementice-meltingforsingletransmission line, the ice-melting effect ofthe proposed scheme is satisfied. KEYWORDS: 220kVtransmissionline ,icecoating , ice-melting,high voltage technology ;<$2008'1()-./.0123456789:; <)220kV=>?******@ABC9:;<D)EFGH 8I#J/K