Wide scope pollution-flashover of 500 KV transmission lines—causes and preventive countermeasures

(整期优先)网络出版时间:1991-01-11
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DuringtwoyearsoddperiodfromDec.1987toFeb.1990,therehadbeenrepeatedlypollution-flashoverfailuresonour500kVtransmissionlines,resultinginawidescopeblackout.Therewereeleven500kVlinesaltogetherinNorth-east,EastandNorthChinapowergrids,wherepollution-flashoverfailureshappenedoneafteranotheron36transmissionlinetowers(poles).Since500kVtransmissionlinesarethemaintrunksofhighvoltage