外串间隙线路型避雷器在架空输电线路中的防雷作用

Line arresters with external series gaps used in lightning protection for overhead power transmission lines

针对阳江地区输电线路存在遭受严重雷击跳闸的问题,分析了各种雷击过电压引起的线路闪络跳闸,介绍了外串间隙线路型避雷器在输电线路中间防雷的机理,指出在阳江电网中应用外串间隙线路型避雷器解决架空输电线路中间防雷的必要性及避雷器的安装选点原则,可供同行参考。

In view of the serious problem of lightning-caused transmission line tripping in the area of Yangjiang, China, this paper analyzes the line flashover tripping caused by various lightning-strike overvoltages. With the description of the lightning protection mechanism of surge attesters with external series gaps for power transmission lines, the necessity of applying the arresters to the lightning protection for overhead power transmission lines in Yangjiang power network is indicated; the points for attention as to their installation, test and maintenance are also included.