摘要
针对一起500 kV输电线路架空地线(型号JLB20A-80)断落跳闸事故,采用宏观检查、故障录波分析、扫描电子显微镜检查以及能谱分析等方法,判定地线断落原因为大风作用下受雷击后高温熔断。采用将断落点直线塔的悬垂串更换为耐张串的方法,对断落地线进行快速修复处理并恢复送电,有效缩短了抢修时间,提高了抢修效率及安全性。
Aiming at an accident of500kV line breaking of overhead ground wire(model JLB20A-80)tripping,with the comprehensive analysis on macroscopic inspection,fault recorder,scanning electron microscopy and energy spectrum,the reason for the broken ground wire is that the high temperature fuse occurs after lightning and strong wind.This fault treatment uses the method of replacing overhanging string of broken point line tower with suspension strain string to repair broken ground wire rapidly.So it leads to recovery of power supply,shortening repair time effectively and improving efficiency and safety by rapid repairing.
作者
朱迪锋
黄建峰
张湘红
孙弼洋
刘红鑫
ZHU Difeng;HUANG Jianfeng;ZHANG Xianghong;SUN Biyang;LIU Hongxin(State Grid Zhejiang Power Company Maintenance Brunch, Hangzhou 311232, China)
出处
《内蒙古电力技术》
2018年第2期47-49,共3页
Inner Mongolia Electric Power
关键词
架空地线
断落
雷击
悬垂耐张串
快速修复
overhead ground wire
broken
lightning
suspension strain string
rapid repairing
