高电压技术2017，Vol.43Issue(5)：1609-1614,6.DOI:10.13336/j.1003-6520.hve.20170428029
输电线路走廊雷电流幅值分布统计方法
Statistical Method of Lightning Current Amplitude Distribution Along Transmission Line Corridor
摘要
Abstract
Since lightning parameter behaves remarkable difference along power lines,an onefold formula of accumulative probability distribution(APD) of lightning current amplitude(LCA) is not able to characterize the actual situation for a long power line.We put forward a detailed statistical method of APD of LCA for multiple sections to refine lightning protection analysis.The method is based on "grid method" and merges grids into a statistical section according to ground flash number in grid,further respectively obtains a formula for each section,and 2 000 is suggested to be an appropriate threshold for division of sections by case study.A comparison between onefold and multiple APD formulas of LCA indicates that they bring about a difference of-0.093 to 0.181 times/(100 km·a) in back stroke trip-out rate(BSTOR) to 110 kV transmission tower,while a slight differencer to 220 kV and 500 kV transmission tower.As to the shielding failure trip-out rate(SFTOR) of 500 kV transmission tower,they produce negligible differences if ground elevation is less than 10° while difference is about-13.2％ to 6.2％ when it is 30°.关键词
雷电流幅值/累积概率分布/输电线路/防雷/反击跳闸率/绕击跳闸率Key words
lightning current amplitude/accumulative probability distribution/transmission line/lightning protection/back stroke trip-out rate/shielding failure trip-out rate引用本文复制引用
赵淳,雷梦飞,陈家宏,谷山强,王佩,赵俊杰..输电线路走廊雷电流幅值分布统计方法[J].高电压技术,2017,43(5):1609-1614,6.基金项目
国家电网公司科技指南项目(5211JH1500X7).Project supported by Science and Technology Project of SGCC(5211JH1500X7). （5211JH1500X7）
