基于小波变换的电力系统故障暂态信号分析  

Analysis of Transient Fault Signal of Electric System Based on Wavelet Transform

作　　者：王高丰[1] 杲秀芳[1] 唐博[1] 李平[1] 

机构地区：[1]西南交通大学电气工程学院,四川成都610031

出　　处：《电气开关》2007年第4期7-8,12,共3页Electric Switchgear

摘　　要：介绍了连续小波变换定义。小波变换具有良好的时频局部化特性,并可根据信号频率的变化自动调节时频窗口,因此小波变换十分适合电力系统故障产生的暂态信号的分析。电力系统故障暂态信号的小波变换模极大值标志着电力系统最重要的故障特征。Introduce the concept of continuous wavelet transform. Wavelet transform which has perfect time-frequency characters can adjust both time and frequency windows automatically according to input signal＇s frequency. Therefore it adapts to analysis the transient signal which happens when the power system has some faults. The wavelet transform modulus maximum of transient signal indicates the important fault character and provides means for relay protection and fault location in power system.

关 键 词：小波变换 电力系统 故障暂态信号 模极大值 故障特征 

分 类 号：TM76[电气工程—电力系统及自动化]