架空输电线路雷击事故分析及对策

Analysis and Countermeasures of Lightning Strike Accidents on Overhead Transmission Line

通过对近几年架空输电线路雷击跳闸事故的专项调查,分析了某地区35kV及以上输电线路雷击事故特点与原因,根据该地区雷电活动及输电线路实际运行状况提出了“改造接地电阻为主,加装避雷线、避雷器为辅”的防雷对策,以达到提升输电线路防雷水平、降低雷击跳闸率、保护输电线路安全稳定运行的目的。

Through the special investigation on the lightning strike accident of transmission line in recent years, the characteristics and causes of lightning strikes on transmission lines of 35kV and above in some area are analyzed.This paper puts forward the lightning protection countermeasures of “ modifying grounding resistance as the main part,installing lightning conductor and arrester as the auxiliary part” according to the lightning activity of this area and the actual operation status of transmission lines, in order to improve the lightning protection level of the transmission line,and reduce the lightning trip-out rate and protect the safe and stable operation of the transmission line.