基于S变换与相关算法的配电网雷击故障识别与定位

Lightning Fault Identification and Location Based S-Transform and Correlation Algorithm in Distribution Network

针对容易受雷电影响的配电网,提出了基于S变换的雷击故障识别方法,有效地识别轻型雷击、重型故障性雷击以及单相接地故障,减少雷击误判跳闸,提高配电网运行可靠性。提出一种基于互相关算法的雷击定位方法,对比两个信号波形的相似度,适用于雷电直击配电网的定位研究。软件仿真结果表明,以上两种方法可准确、有效地识别与定位雷击故障。

Aiming at the distribution network which was easy to be influenced by lightning, this paper proposed a lightning fault identification method based S-transform ,which effectively identified the light-duty direct-lightning, severe fault direct-lightning and single-phase grounding fault. It is helpful to reduce the tripping of lightning misjudgment and improve the stability of distribution network. A lightning location method based on correlation algorithm was proposed, which can compare the similarity of the two signal waveforms. The lightning location method is suitable for the study of location lightning in the distribution network. The simulation results show tbe above two methods can accurately and efficiently identify the lightning fault and locate the lightning fauh.