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.