基于数学形态学的单相接地故障信号的特征提取

小电流接地电网单相接地故障发生几率很高,选出故障线路的关键是故障信号的特征提取,本文应用数学形态学的形态变换和形态学梯度方法来提取故障信号的特征分量,首先对形态变换和形态学梯度的进行了分析,然后通过对实际采集到的故障数据进行故障特征提取,并对比用小波变换对故障数据进行的特征提取。分析表明数学形态学在信号处理方面具有很好的应用性和计算量小的优势。

Obtaining character of fault signal based on mathematical morphology

Single phase grounding fault in small current grounding power system is the most frequently fault.Detecting the fault line's key is obtaining character of fault signal.In this paper,it uses morphology transform and morphology grads of mathematical morphology to obtain character of fault signal.And it analyzes the form of morphology transform and morphology grads,and then obtains character of real fault data,and compares wavelet transform.It is proved that mathematical morphology has well application and advantage of small calculation.