1000kv特高压交流输电线路防雷问题分析

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1、1000kV特高压交流输电线路防雷问题研究AbstractAlotofhigh-voltageandEHVtransmissionlinesoperatingexperiencehaveshownthat：thelighntingisthemainreasontocausethetripfaultsoftransmissionlinesathomeandabroad．Andwiththegradualimprovementofvoltagelevels，lightningproportionwillgraduallyincrease．Comparedtothehigh-volta

2、geandEHVtransmissionlines，I，HVACtransmissionlineshavethoseowncharacteristics，suchas：thehighervoltagelevel，themorecomplexparameters，thefarthertransport,thehighertower,thebiggerattractinglightningareaandmorevulnerabletobelightningstrokeetc．ItiswellknownthatlighningactivityisverystronginChina．10

3、00kVI删ACtransmissionlinesarelocatedinthewildernessandwindinthemountainous．Mostoflinescorridorgetthroughthecomplexenvironmentregionsandfaceaseveretestofice，filthandlightning．Therefore，thereisimportantsignificancetomakereaserchanddesignoflightningprotectionandensuresafeandreliableoperationof100

4、0kVACtransimissionlinesbasdedonthevaluableexperience．FocusingonthoseowncharactersandthecurrentproblemsoflightningprotectionofUHVtransimissionlines．thelightningprotectionofl000kVACtransimissionlinesareresearchedinthispaper．themainworkandinnovationpointsareexpressedasfollow：1．Inordertomoreaccur

5、atllysimulatethewaveprocessoflightningstrikinggroundwiresandconductors，thecorrespondingcomponentmodelsarecreatedbyATP—EMTP，suchas：thetowermodel，thelinemodel，insulatorflashmodel，resistancemodeletc．．2．Thestrongimpulsivecoronaisproducedwhenhighamplitudelightningcurrentstikesgroundwiresandconduct

6、ors．Focusingontheshortageofonlyconsideringimpulsivecoronaoftheconductorsandthecharacteristicsof1000liVUHVACtransmissionlines．andaccordingtotheq-ucharacteristicsofcorona,theequivalentcircuitmodelsofcoronaofthecorrespondingtransmissionlinesareestablishedandcombinedwithJmartilinesbyATP-EMTP．Back

7、strikingandshieldingfailurelightningwithstandlevelfor1000kVUHVACtransmissionlinearerespectivelyanalyzed．3．Basedontheimpactoflinean'esteronlightningprotectionofhigh—voltageandEHVtransmissionlines，theeffectoflinearresterinstallationmode、thefreq