基于小波理论的小电流单相接地故障分析

作者：宋东驰，吴国忠，屠雪勇 日期：2008-02-25/span> 浏览：3343 查看PDF文档

基于小波理论的小电流单相接地故障分析

宋东驰，吴国忠，屠雪勇
（浙江大学 电气工程学院，浙江 杭州 310027）

摘要：分析了小电流接地系统发生单相接地故障时的运行特点，提出了一种利用一维小波离散变换（多分辨分析）和小波包分析的故障选线、定位方法，在Matlab 6.5环境下，通过Simulink中的电力系统仿真库，建立了相关模型，并进行了仿真验证。仿真结果表明，利用小波分析方法进行系统选线及故障定位，不仅快速、准确，而且适用于多种中性点接地方式，因而具有较为广泛的应用前景。
关键词：小电流；接地故障；小波变换；选线；小波分析
中图分类号：TM711文献标识码：A文章编号：1001-4551(2008)02-0107-04

Analysis of single-phase-to-earth fault in low-current grounding power
systems based on wavelet transform
SONG Dong-chi, WU Guo-zhong， TU Xue-yong
(College of Electrical Engineering, Zhejiang University, Hangzhou  310027, China)
Abstract: The basic principles and characteristics of low-current grounding power systems were presented. A novel method using one-dimensional discrete wavelet (multi-resolution analysis) and wavelet-package analysis was proposed to apply in the location and detection of single-phase-to-earth fault. Relative system models could be built and simulated based on the environment of Matlab 6.5. Simulation results show that wavelet analysis has the advantages of speediness and precision, and could be used in many situations of power systems with different neutral point grounding modes.
Key words: low-current; phase-to-earth fault; wavelet transform; location; wavelet analysis
参考文献(Reference):
［1］Electric Power Research Institute. Wavelets: A Tool for Enhanced Information Processing［C］. EPRI Technical Brief, TB-104386, September,1994.
［2］MEYER Y. Wavelets Algorithms & Applications[C]. Society for Industrial and Applied Mathematics (SIAM), Philadelphia,1993.
［3］RIBEIRO P F. Wavelet Transform: An Advanced Tool for Analyzing Non-stationary Harmonic Distortions in Power Systems［C］. Proceedings of IEEE ICHPS VI, Bologna, Italy, September 21-23,1994：350-370.
［4］程正兴.小波分析算法与应用［M］.西安：西安交通大学出版社，2003.
［5］任震.小波分析及其在电力系统中的应用［M］.北京：中国电力出版社，2003.
［6］秦前清.实用小波分析［M］.西安：西安电子科技大学出版社，1995.
［7］李东海，卢晓江，赵欣.基于小波变换的异形喷嘴射流特性分析［J］.轻工机械,2005,23(4):26-28.
［8］韩祯祥.电力系统分析［M］.杭州：浙江大学出版社，1997.