复杂地形高空接闪线保护范围测定的一种方法

目前较多水电站采用高空接闪线进行雷电防护,高空接闪线一般距地面较高,线塔之间距离较远(有的甚至在不同山头),接闪线弧垂很难测量,接闪线本身又可能随风而动,因此其保护范围测定难度很大。为了解决复杂地形下水电站防雷检测中遇到的问题,建立了一种利用经纬仪等设备测定高空接闪线保护范围的方法,经过多次改进,该方法在没有其他先进设备的情况下已能有效解决问题。

A Method of Measuring the Protection Range of Overhead Ground Wire in Complex Terrain

At present,many hydropower stations adopt overhead ground wire for lightning protection.The overhead ground wire is generally higher than the ground,and the distance between towers is far(some are even in different mountains).It is difficult to measure the arc sag of the overhead ground wire,and the overhead ground wire may move with the wind,so it is very difficult to determine the protection range of the overhead ground wire.In order to solve the problems encountered in lightning protection detection of hydropower stations in complex terrain,a method of measuring the protection range of overhead ground wire at high altitude by using theodolite and other equipment was established.After many improvements,this method could effectively solve the problems without other advanced equipment.