变电站防雷方法研究

Research on Lightning Protection Method for Substation

以110 kV变电站为研究对象,论述了雷电对变电站的危害,提出了该电压等级变电站防雷接地装置的要求和接地的基本原则。通过将保护间隙的最小放电电压和线路最大操作过电压进行绝缘配合,获得了保护间隙引弧端间的最小距离,以保证间隙在此操作过电压下不放电,为线路的防雷工作提供了一个解决方案。

Taking the 110 kV substation as research object,this paper discusses the harm that lightning does to the substation,and puts forward the requirements for lightning protection grounding device and the basic grounding principle in this voltage level substation.Through the insulation coordination between the minimum discharge voltage of protective gap and the maximum switching overvoltage of the line,the minimum distance between the arcing ends of the protective gap is obtained to ensure that the gap does not discharge under this switching overvoltage,which provides a solution for the lightning protection of the line.