| 离散小波变换在电力系统故障检测中的应用 |
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| 引用本文： | 周雪松,李显冰,马幼婕.离散小波变换在电力系统故障检测中的应用[J].天津理工大学学报,2008,24(4). |
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| 作者姓名： | 周雪松 李显冰 马幼婕 |
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| 作者单位： | 天津理工大学,自动化学院,天津,300191 |
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| 基金项目： | 天津市重点科技公关项目，天津市重点科技公关项目 |
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| 摘 要： | 传统的傅立叶分析难以处理电力系统故障时产生的暂态信号.小波变换具有良好的时频局部化特性,为分析非平稳、突变信号提供了有效的途径.通过多尺度分析,将连续小波变换离散化,得到适合数字信号处理的快速算法——离散小波变换.最后给出了应用离散小波变换进行输电线路故障测距的实例,通过仿真分析证明该方法可以极大地提高测距精度.
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| 关 键 词： | 电力系统 小波变换 多尺度分析 故障测距 |
Discrete wavelet transform and its application in power fault detection |
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| ZHOU Xue-song,LI Xian-bing,MA You-jie.Discrete wavelet transform and its application in power fault detection[J].Journal of Tianjin University of Technology,2008,24(4). |
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| Authors: | ZHOU Xue-song LI Xian-bing MA You-jie |
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| Abstract: | The transient signals produced by power system fault can hardly be analyzed with Fourier analysis.Wavelet transform provides an effective tool for non-stationary signals analysis,by its excellent properties in both time domain and frequency domain.This paper introduced the multi-resolution analysis(MRA) theory,and from which,a fast algorithm for Wavelet transform(discrete wavelet transform) was received by discretizing of the CWT(continuous wavelet transform).At last,the discrete wavelet transform was used in fault location,and proved to be efficient by the simulation. |
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| Keywords: | power system wavelet transform multi-resolution analysis(MRA) fault location |
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