摘要
针对某条220kV输电线路雷害事故情况分析,对线路铁塔接地装置进行了建模仿真计算,通过模拟其真实的土壤分层情况,分析了铁塔接地电阻偏高的原因。根据仿真结果与线路实际运行情况,提出了在花岗岩土层表层深度不同时,加长接地装置放射线、加装非金属接地模块、实施爆破接地技术以及添加降阻剂的接地装置改造方案。
One 220 kV transmission line often occur lightning troubles. In order to solve the problem, modeling and simulation for the grounding device was calculated, causes of high tower grounding resistance was analysed by simulating real soil layers. According to the simulation results and actual operation situation, schemes such as extended grounding device radiation, equipped with nonmetal grounding module, implementation of blasting technology and adding drag reduction agent of grounding device are proposed according to different granite surface layer depth.
出处
《吉林电力》
2015年第4期16-20,共5页
Jilin Electric Power
关键词
220KV输电线路
防雷
接地装置
接地电阻
220 kV transmission line
lightning protection
grounding device
grounding resistance
