文档介绍：37! 11" # $%& Vol. 37No. 11 2013'11( PowerSystemTechnology Nov. 2013 !"#$1000-3673)2013*11-3007-08 %&'(#$TM 773 )*+,$A -./,$4704054 ±800kV0123456789:;<=> !" 1#$%& 2#'() 1#*+, 2#-./ 2 1!"#$%&'()*%+,-./(012345"#$61500017 2!89:%'();%+(01<=5896650051> Transient Identification ofLightning Strokes on ±800kVUHVDCTransmissionLines LIUKezhen 1, SHUHongchun 2,YUJilai 1,TIANXincui 2,WUWeimin 2 (1. Schoolof Electrical EngineeringandAutomation, HarbinInstituteofTechnology, Harbin150001, HeilongjiangProvince, China; 2. Facultyof ElectricPower Engineering, KunmingUniversityof ScienceandTechnology, Kunming650051,YunnanProvince, China) ABSTRACT:WhenthunderboltdirectlystrikesonUHVDC transmissionlineanddoesnotleadtolinefault,thevoltage travelingwaveonpolarlinealternatelyfluctuatesaroundthe ponentandthecorrelationdegreebetweenthevoltage traveling- featurecanbeusedasthecriteriontoidentifylightning ,therearelotsof high-ponents in lightning wave, which attenuatesquicklyaftertheinsulationisbrokedown;when urs,thetravelingwaveofshort-circuitvoltageis causedbyadditionalpowersupply,sotherearefew high- finallytakesonthefeatureofearthfault,andafterthewavelet transformthemedium-andlow-ponentsdueto lightningstrokearesimilartothoseofearthfault,thustheratio ofhigh-ponentscausedbylightningstroketo