Single phase earthed fault is the common fault in this system. To detect the faulty feeder is difficult for the fault current is very small.
单相接地短路是最常见的故障，由于它的接地短路电流较小，使故障检测较困难。
参考来源 - 基于小波包技术的小电流接地系统故障选线研究及其DSP实现·2,447,543篇论文数据，部分数据来源于NoteExpress
Single phase earthed fault is the common fault in this system. To select the fault line accurately is of great importance to improve the operation reliability.
在小电流接地系统中，发生单相接地故障的概率很高，因而，准确的选出故障线路，对于提高运行可靠性，具有重要的意义。
On account of the weak fault current and unstable fault arc, the problems of the single phase to ground fault line selection in the non-solid earthed network have never been thoroughly resolved.
由于故障电流小、电弧不稳定等原因，小电流接地系统单相故障选线问题始终没有得到彻底解决。
The signal injection method is widely used for automatic selecting fault line in indirectly earthed power system, which has great effect in the system of single-phase ground fault.
注入信号法是一种效果较好的选线方法，其原理广泛应用于小电流接地系统单相接地故障的自动选线。
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