1000kV单回特高压交流输电线路的绕击防雷保护.pdf

DOI:10.13335/j.1000-3673.pst.2008.01.001 32 1 Vol. 32 No. 1 2008 1 Power System Technology Jan. 2008 100001-0001-04 TM853 A 470·4034 1000 kV 1 2 3 2 4 4 4 1 264002 2 250001 3 266000 4 264001 Lightning Shielding Failure Protection for 1000 kV Single Circuit UHVAC Transmission Line 1 2 3 2 WANG Mao-cheng ZHANG Zhi-qu TENG Jie CHENG Xue-qi 4 4 4 LI Qiang JI Shan-hao DONG Hai-feng 1Yantai Electric Power Design InstituteYantai 264002Shandong ProvinceChina 2Shandong Electric Power Corporation Jinan 250001Shandong ProvinceChina 3Qingdao Electric Power CompanyQingdao 266000Shandong ProvinceChina 4Yantai Electric Power CompanyYantai 264001Shandong ProvinceChina ABSTRACT: The drift of wind and rain in the air and the existence of inhomogeneous medium make the locus of lightning behaving as irregular curve. Considering the factors such as randomness of natural lightning locus and the coexistence of primary and secondary leaders, it is necessary to 0 lead in the concept of dynamic lightning protection shielding 1000 kV angle. It is suggested that the angular bisector of practical protective angle for