| 基于小波变换的电力系统故障暂态信号分析 |
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| 引用本文： | 王高丰,杲秀芳,唐博,李平.基于小波变换的电力系统故障暂态信号分析[J].电气开关,2007,45(4):7-8,12. |
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| 作者姓名： | 王高丰 杲秀芳 唐博 李平 |
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| 作者单位： | 西南交通大学电气工程学院,四川,成都,610031 |
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| 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,可以作为继电保护和故障测距的依据
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| 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 |
| 文章编号： | 1004-289X（2007）04-0007-03 |
| 修稿时间： | 2006-09-22 |
Analysis of Transient Fault Signal of Electric System Based on Wavelet Transform |
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| WANG Gao-feng,GAO Xiu-fang,TANG-Bo,LI Ping.Analysis of Transient Fault Signal of Electric System Based on Wavelet Transform[J].Electric Switchgear,2007,45(4):7-8,12. |
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| Authors: | WANG Gao-feng GAO Xiu-fang TANG-Bo LI Ping |
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| Affiliation: | School of Electric Engineering, Southwest Jiaotong University,Chengdu 610031,China |
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| Abstract: | 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. |
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| Keywords: | wavelet transform power system transient fault signal modulus maximum fault character |
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