基于小波变换的单相接地故障选线方法

New Method to Dectect Faulty Line for Single-Phase to Ground Fault Occurred in Distribution Network

将小波变换的方法应用到配电网单相接地故障选线中,利用小波变换的时频局化特性,充分利用故障线路暂态信息,再利用合理的判据,从而达到准确选线的目的。Matlab小波工具箱仿真分析的结果表明了方法的可靠性。

The paper put forward a new method based on waveform. Applying the wavelet packets to the decoposition of transient zero sequence current that appears after the single phase to ground fault occurred in the distribution network. The reliability of the results is confirmed with Matlab wavelet toolbox.