| 小波变换在绝缘子泄漏电流检测中的应用 |
| |
| 引用本文： | 赵汉表,林辉,廖胜蓝,谢利理.小波变换在绝缘子泄漏电流检测中的应用[J].高电压技术,2005,31(4):34-36. |
| |
| 作者姓名： | 赵汉表 林辉 廖胜蓝 谢利理 |
| |
| 作者单位： | 西北工业大学自动化学院电气工程系,西安,710072;西北工业大学自动化学院电气工程系,西安,710072;西北工业大学自动化学院电气工程系,西安,710072;西北工业大学自动化学院电气工程系,西安,710072 |
| |
| 摘 要： | 为了掌握运行中绝缘子的污秽程度,介绍了一种基于小波变换的绝缘子泄漏电流检测方法。通过正交小波分解含有噪声的泄漏电流信号,利用噪声信号主要表现的高频特性,对分解后的高频系数进行阈值量化处理,并重构处理后的泄漏电流信号以消除噪声。对在此基础上设计的基于DSP的绝缘子在线监测系统仿真和实验的结果表明,采用这种算法可提高对绝缘子污秽程度的预测效果。
|
| 关 键 词： | 小波变换 绝缘子 泄漏电流 噪声 |
| 文章编号： | 1003-6520(2005)04-0034-03 |
| 修稿时间： | 2004年6月8日 |
New Method for Leakage Current Detection of Insulators Based on Wavelet Transform |
| |
| ZHAO Hanbiao,LIN Hui,LIAO Shenglan,Xie Lili.New Method for Leakage Current Detection of Insulators Based on Wavelet Transform[J].High Voltage Engineering,2005,31(4):34-36. |
| |
| Authors: | ZHAO Hanbiao LIN Hui LIAO Shenglan Xie Lili |
| |
| Affiliation: | (NorthWestern Polytechnical University, Xi’an 710072, China) |
| |
| Abstract: | In this paper, a method for leakage current detection of insulators based on wavelet transform is introduced. The orthogonal wavelet transform of the current signal including noise is studied and the decomposed results of high frequency coefficient is analyzed and processed by the threshold according to the characteristic of noise. Through reconstructing the signal with the processed results, aim of reducing the noise can be reached. Also, an on-line monitoring system for insulators is designed based on DSP. Through the simulative and practical tests, it is proved that the method is efficient in improving detection of maximum of leakage current and the prediction of the degree of insulators contamination can be promoted. |
| |
| Keywords: | wavelet transform insulators leakage current noise |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
