山区架空输电线路防雷技术研究

为了解决广西电网山区高杆塔输电线路雷击跳闸率高的问题,利用ATPDraw仿真软件研究分析在输电线路高杆塔上架设避雷器和用滚球法原理安装避雷侧针的理论防雷效果,并对广西电网雷击跳闸率较高的输电线路进行防雷措施试点改造,对雷电易击段有选择性地采取装设线路避雷器、加强线路绝缘和装设防绕击避雷针等综合防雷技术措施,改造后的输电线路雷击跳闸率逐年下降。

Research on Lightning Protection Technology for Mountainous Area Overhead Transmission Line

For solving problems of high lightning trip-out rate of high tower transmission lines of Guangxi power grid in mountainous area, this paper analyzes theoretical lightning protection effects by using ATPDraw simulating software to erect arresters on the high tower of transmission lines and install lightning side rods by using rolling sphere method principle. It carries out trial reforms in lightning protection measures for those transmission lines of higher lightning trip-out rate, such as erecting line arresters selectively for those sections easy to be lightning stroke, strengthening insulation of lines or installing shielding failure lightning rods. Practice has proved that lightning trip-out rate of transmission lines after reforms decreases year by year.