摘要
介绍了应用Matlab软件的基于小波变换和双端行波测距法的电力电缆故障定位检测技术,重点探讨了基于小波分析的模极大值法。该方法首先使用小波变换获得小波三层分解波形,接着使用模极大值法理论获得分解波形中的模极大值点,得到原始波形中突变点,最后根据双端行波测距原理得出故障点位置。试验证明,使用该方法对故障点的精确定位在技术上是可行的。
In this paper, a number of power cable line fault location detection methods are introduced based on wavelet transform and double-terminal traveling wave with Matlab. Modulus maxima method is highlighted. First, use the wavelet transform to obtain waveform in three layer wavelet decomposition, then get the modulus maxima points by method of modulus maxima from the decomposition waveform which is also named the mutation point in original waveform. At last, the distance of fault point can be calculated according the principle of double-terminal traveling wave.Test proves that using this method for fault location is technically feasible.
出处
《中国民航飞行学院学报》
2015年第2期18-22,共5页
Journal of Civil Aviation Flight University of China
基金
中央高校基本科研业务项目(ZXB2011 A003)
中国民航大学科技基金项目(2010ky E07)
中国民航大学校级科研项目(2011ky E01)
关键词
小波变换
模极大值法
双端行波
Double-terminal traveling wave
Wavelet analysis
Modulus maxima
