| 二次小波变换自动阈值算法提取局部放电信号 |
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| 引用本文： | 罗洪霞,张雪峰.二次小波变换自动阈值算法提取局部放电信号[J].现代电子技术,2007,30(17):130-132. |
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| 作者姓名： | 罗洪霞 张雪峰 |
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| 作者单位： | 广东工业大学,华立学院,广东,广州,511325 |
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| 摘 要： | 采用二次小波变换自动阈值算法对局部放电信号进行提取。在数值仿真中,采用指数衰减或指数衰减振荡等4种放电信号,研究了局部放电信号的提取效果。仿真结果表明,由于小波变换具有多分辨率的特性,能有效地从随机噪声中提取出放电信号,较常规一次小波变换阈值消噪方法相比,二次小波变换更多地保留了原始局部放电信号的特征信息,该算法处理速度较快,也适合在线处理。
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| 关 键 词： | 局部放电 二次小波变换 自动阈值 信号提取 |
| 文章编号： | 1004-373X（2007）17-130-03 |
| 收稿时间： | 2007-05-25 |
| 修稿时间： | 2007-05-25 |
Second Wavelet Transform Automated Threshold Algorithm for Partial Discharge Extraction |
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| LUO Hongxia,ZHANG Xuefeng.Second Wavelet Transform Automated Threshold Algorithm for Partial Discharge Extraction[J].Modern Electronic Technique,2007,30(17):130-132. |
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| Authors: | LUO Hongxia ZHANG Xuefeng |
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| Affiliation: | Huali College,Guangdong University of Technology, Guangzhou, 511325, China |
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| Abstract: | Automated threshold algorithm of second wavelet transform is used in extraction of partial discharge.Exponential decay or exponential decay oscillating.four kinds of partial discharges are used in numeric simulation,and effectiveness of extraction of partial discharge is studied.Simulation results show that wavelet transform can effectively extract partial discharge from random noise because it has multi-resolution,and second wavelet transform reserves more features of original partial discharge than conventional de-noise method of first wavelet transform.The method process swift,and it is adaptive to dispose on line. |
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| Keywords: | partial discharge second wavelet transform automated threshold signal extraution |
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