Coiflet小波和多目标优化在直流接地故障检测中的应用

低频信号注入法是直流系统接地故障检测中经常用到的方法之一,优点是检测精度较高且操作方法简单,缺点是容易受到对地电容的影响而降低检测精度,文章针对这一缺陷,提出了基于coiflet小波分析的数据提取和多目标优化的数据处理结合的检测方法,该方法可以很大程度上减小对地电容对检测精度的影响,经过MATLAB平台的仿真验证,结果表明,该方法可以有效的提高直流系统接地故障检测的准确性。

The application in the detection of DC system grounding fault based on coiflet wavelet and multi-target optimization

The low frequency signal injection method is one of the DC system grounding fault detection methods. The detection accuracy is high and easy to operate. But it also easy to be impacted by the large amount of ground capacitance. To avoid this interference, this text raise a method combined the data extraction based on coiflet wavelet transform and the data processing base on multi-target optimization. This method decrease the affect by the ground capacitance. With the simulation verification in matlab, the result prove the method has increase the accuracy in DC system grounding fault detection indeed.