复小波在谐振接地系统故障选线中的应用研究

 传统的故障选线方法，大多是基于单相接地故障发生在相电压过峰值附近这一条件，而对于相电压过零附近发生故障的情况，很少有针对性的选线方法；而由于故障发生时刻的不同，故障信号量的特征又存在着较大差别，一种选线原理很难同时适应这两种故障情况；本文根据故障发生时刻不同而产生的不同故障量特征，提出了利用暂态零序电流和衰减零序直流相结合的综合选线方法；并通过MATLAB仿真验证了该方法的可靠性。

Study on Fault Integrative Line Selection Based on Complex Wavelet Of Resonance-grounding System

Most traditional methods of fault line selection are based on the case, that the fault occurred when the phase voltage passed the peak value, while a few methods are providing according the case of the phase voltage passed zero. However, because the different of fault occurred time, the characters of fault singles are very differently, so one method can’t suit for two situation well. This article accord to the different characters of different fault time, putting forward a integrated method which using both of transient zero-sequence current and attenuating direct current, and through MATLAB simulation proving this method is credible.