三峡近区500 kV出线雷电综合治理效果分析  

Analysis on the Effect of Comprehensive Lightning Protection for 500 kV Out Lines in Three Gorges Area

作　　者：马建国 孟刚[2,3] 陈路 李健 谷山强[2,3] 赵淳 吴敏[2,3] MA Jianguo;MENG Gang;CHEN Lu;LI Jian;GU Shanqiang;ZHAO Chun;WU Min(State Grid Hubei Electric Power Co.,Ltd.,Wuhan 430077,China;Wuhan Nanrui Electric Co.,Ltd.,State Grid Electric Power Research Institute,Wuhan 430074,China;Hubei Provincial Key Laboratory of Lightning Strike Risk Prevention,Wuhan 430074,China)

机构地区：[1]国网湖北省电力有限公司,武汉430077 [2]国网电力科学研究院武汉南瑞有限责任公司,武汉430074 [3]电网雷击风险预防湖北省重点实验室,武汉430074

出　　处：《电瓷避雷器》2020年第3期167-174,共8页Insulators and Surge Arresters

摘　　要：雷害是架空输电线路跳闸的首要原因,为降低线路雷击跳闸率,提升线路雷电防护水平,运行单位需对输电线路进行雷害风险评估,并针对高雷害风险等级杆塔采取差异化的防雷措施。目前针对防雷措施治理效果分析方法主要通过对比改造前后线路雷击跳闸次数或雷击跳闸率的变化,该方法简单直观,但由于一条线路往往采取多种防雷措施,以及改造前后雷电活动的差异性等造成综合防雷效果的评价实施非常困难。通过分析三峡近区2000-2018年雷电活动情况、跟踪15条500 kV出线防雷措施的滚动实施情况及其历年的雷击运行数据,提出采用多重线性回归分析方法计算各种防雷措施安装数量与雷击跳闸率的标准偏回归系数,从而衡量各种防雷措施对降低雷击跳闸率贡献大小;同时,提出采用线路安装防雷措施部分与未安装部分雷击跳闸率的变化率来量化分析各种防雷措施的防护效率,以此计算得到了线路避雷器、可控放电避雷针的保护效率,与现场运行经验一致。三峡近区线路的雷电综合治理效果的分析方法和结论可为我国线路差异化防雷的实施提供一定的参考。Lightning hazard is the main reason for the tripping of overhead transmission lines.In order to reduce the lines tripping rate and improve the lightning protecting level,the operating companies used to conduct lightning risk assessment on the transmission lines and take differentiated lightning protection measures for the high lightning risk towers.At present,the analysis method for the effect of lightning protection is mainly comparing the operating performance of transmission lines before and after the rebuilding,such as tripping times or rates.This method is simple and intuitive.However,it is very difficult to evaluate the comprehensive lightning protection effect due to several lightning protection measures were taken on a line and the differences in lightning activities before and after the rebuilding.By analyzing the lightning activity of Three Gorges area from 2000 to 2018,tracking the rolling implementation of lightning protection measures for 15 transmission lines at 500 kV and their lightning strike operation data,we proposed a multiple linear regression analysis method to calculate the standard partial regression coefficient of various lightning protection measures and the lightning striking rate,so as to measure the contribution of various lightning protection measures to reduce the lightning trip rate.Meanwhile,we propose to use the change rate of the lightning tripping rates which a line installed lightning protection measures parts and the uninstalled parts to quantify the protection efficiency of various lightning protection measures.In this way,we calculated the protection efficiency of line arresters and controllable discharge lightning rods,and the results are consistent with actual operating experience.The method and conclusion of the effect analysis of comprehensive lightning protection in Three Gorges area provide a reference for the implementation of differentiated lightning protection in China.

关 键 词：防雷措施 效果分析 标准偏回归系数 防护效率 三峡近区 500 KV 出线 

分 类 号：TM863[电气工程—高电压与绝缘技术]