某地区220kV输电线路雷害事故分析及差异化防雷改造  

Analysis of lightning Damage of 220kV transmission line in a region and differentiated lightning protection transformation

作　　者：贾猛 鲁志伟[2] 程龙 庄鹏 JIA Meng;LU Zhiwei;CHENG Long;ZHUANG Peng(Northeast Electric Power University,Jilin 132012,China)

机构地区：[1]国网齐齐哈尔供电公司,黑龙江齐齐哈尔161000 [2]东北电力大学,吉林吉林132012 [3]国网嵊州供电公司,浙江嵊州312400

出　　处：《吉林电力》2024年第3期1-4,12,共5页Jilin Electric Power

摘　　要：针对某地区220kV输电线路发生的雷害事故,建立输电线路反击和绕击的计算模型,结合典型雷击事故,进行事故复现,分析已有防雷措施的有效性,发现该地区由于接地电阻超标造成的反击跳闸事故占总雷击跳闸的43.75%。并针对故障杆塔给出防雷改造方案。Lightning disaster is one of the ten natural disasters,which seriously threatens the safety of power system.The operation experience shows that there are more collision accidents of 220kV and above lines than counterattack accidents,but for mountainous areas with high soil resistivity,both collision and counterattack are easy to occur.Aiming at the lightning accidents of 220kV transmission lines in a certain area,the calculation model of transmission line counterattack and circumstrike is established.Combining with typical lightning accidents,the accident is repeated,and the effectiveness of existing lightning protection measures is analyzed.The conclusion is that the counterattack trip accidents caused by exceeding the standard of grounding resistance account for 43.75%of the total lightning trip.The lightning protection transformation scheme is given for the faulty tower.

关 键 词：雷击故障 电气几何模型 事故分析 差异化防雷改造 

分 类 号：TM862[电气工程—高电压与绝缘技术]