小波换应用于小电流接地故障选线

研究了小波分析在小电流接地系统单相接地故障选线中的应用,利用小波变换这一新兴的信号分析工具,提取故障时的暂态量信息,构造出了基于小波变换模极大值奇异性检测原理的新型选线判据。着重介绍了利用小波变换提取故障信号的暂态高频分量,进行故障选线的方法。并且利用Matlab提供的小波分析工具进行了大量的选线仿真实验,验证了该方法的有效性和可靠性。

Wavelet on Small Current Grounding Fault Lines Selection

In this paper,the important point is the study about the application of wavelet analysis in single phase grounding fault location of small current grounding power systems,wavelet transform is used as a novel tool of signal analysis to obtain useful fault transient components,a new criterion of fault line selection is constructed based on the time and frequency localization character of wavelet transform.This paper introduces a novel fault circuit selecting method,which utilizes wavelets transform to obtain useful fault transient components.And lots of fault circuit selec- ting simulink experiments are done by Matlab software.The results of simulation indicato that the methods in this paper are efficient and relizble.