小波变换和数学形态学在行波法故障测距中应用比较

Contrast Between Wavelet Transform and Mathematics Morphology in Fault Location with Traveling Wave Method

输电线路的行波法故障测距装置完成的主要任务是对录到的电压或者电流行波信号进行信号处理,最终实现故障定位。行波信号中的突变点所在时间点是故障出现的时间点。目前,信号(图像)处理中检测奇异值所用的工具有两种,小波变换和数学形态学。详细说明了小波变换和数学形态学用在行波法故障测距中信号处理部分的原理和相关算法,从不同角度进行了大量的仿真,对仿真所得到的数据进行分析和比较,从而得出二者用在行波法故障测距中都是可行的,同时又都具有各自的特点。

The main task of equipment of fault location by way of the traveling wave, is to catch the signals of voltage or current traveling wave and then process the signals. The precise time of the singularity of the signal emerged can be used for fault location. The wavelet transform and the mathematics morphology are two kinds of tools used in processing singularity signal for signal or image. The interrelated arithmetic about the wavelet transform and mathematics morphology is deduced in details. The relative feasibility of wavelet transform and mathematics morphology is analyzed and compared based on simulation data.