提出了一种基于行波特征频率的暂态信号频域分析的故障测距方法，该方法通过自建立母小波函数对小波函数提取特征频率进行改进，提高故障特征频率的提取精度。利用PSCAD/EMTDC软件，采用本方法对一简单拓扑进行仿真，仿真结果表明该方法具有较高的精度。

A new fault location method with using frequency domain analysis of transient signals was proposed based on traveling wave characteristic frequency. Mother wavelet function was constructed to improve the characteristic frequency extraction of wavelet function, which could increase the extraction accuracy of fault characteristic frequency. Finally, this method was used to simulate a simple topology by using the software PSCAD/EMTDC, which has verified the high accuracy of this method .