输电线路接地故障行波测距新方法

A new technique of earth fault location

介绍了一种输电线路接地故障行波测距的新方法 ,该方法可以消除线路参数不同以及雷击时冲击电晕对行波波速的影响 ,通过小波变换得到线模及地模分量到达母线的时间 ,列出三个时间与故障距离的方程 ,最后得到与波速无关的故障测距公式。

This paper presents a new fault location technique of earth faults.It can avoid the affection of the velocity of travelling wave caused by different transmission lines and the lightning-caused impulse corona,the time of aerial mode and earth mode reaching the bus is measured,three equations involved the time of fault distance are formed,a representation of fault distance independent of the velocity of traveling wave is obtained.