高电压技术2017，Vol.43Issue(8)：2746-2753,8.DOI:10.13336/j.1003-6520.hve.20170731041
500kV紧凑型耐张杆塔绕击耐雷性能精细化分析方法
Elaborate Method for Analyzing Shielding Lightning Performance of 500 kV Tension Tower in Compact Transmission Line
摘要
Abstract
The structure of head of 500 kV tension tower of compact transmission line is complex,and shielding failure trip-out rate of this kind of tower cannot be calculated precisely by traditional calculation method.By establishing an elaborate model of 500 kV tension tower of compact transmission line,we proposed an analysis method of lightning shielding failure trip-out rate of tension tower of compact transmission line on the basis of analysis method of whole span lightning shielding performance,and researched the shielding failure trip-out rate of this kind of tower before and after dismantling ground wire branch.The analysis results show that,after ground wire branch being demolished,the shielding failure trip-out rate of the tower will increase by about 16.3％.Therefore,tower lateral rod is proposed to improve lightning shielding performance.The research results indicate that installing tower lateral rod can notably lower the lightning shielding failure trip-out rate of the tower.Moreover,when three tower lateral rods are respectively installed in three jumper cross arms,the shielding failure trip-out rate of the tower can be lowered by about 59.25％.The research results will provide valuable references for lightning protection renovation on 500 kV tension tower of compact transmission line in China.关键词
紧凑型线路/耐张杆塔/分支地线/全档距/绕击耐雷性能/塔头侧针Key words
compact transmission line/tension tower/ground wire branch/whole span/shielding lightning performance/tower lateral rod引用本文复制引用
赵淳,任华,黄修乾,雷梦飞..500kV紧凑型耐张杆塔绕击耐雷性能精细化分析方法[J].高电压技术,2017,43(8):2746-2753,8.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）
