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中国电机工程学报 2007, 27(6) 89-95 DOI:
ISSN: 0258-8013 CN: 11-2107/TM |
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| 电工电机 |
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多小波消噪算法在局部放电检测中的应用 |
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钱勇 黄成军 陈陈 江秀臣 |
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上海交通大学电气工程系 上海交通大学电气工程系 上海交通大学电气工程系 上海交通大学电气工程系 |
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摘要:
在简单介绍多小波理论及其消噪算法的基础上,将其应用于抑制局部放电检测中的噪声干扰。局部放电是具有多种形态的非平稳信号,针对常见的4种形态的局部放电脉冲,以均方误差为衡量指标,通过蒙特卡罗仿真分析,研究了小波与多小波在不同局部放电模型下的消噪效果,并就二者提取多态性局部放电的性能进行了比较。研究结果表明,多小波对局放的先验知识要求较低,能够有效地处理多种形态的局放信号,在抑制噪声干扰的同时,能够保留更完整的局部放电信息。 |
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关键词:
多小波
小波
局部放电
多态性
白噪声
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Application of Multi-wavelet Based on Denoising Algorithm in Partial Discharge Detection |
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Abstract:
After briefly introducing the theory of multi-wavelet based on denoising algorithm, it was applied to detect the signals of partial discharge. Partial discharges were nonstationary electric signals with various modes. In the contribution, denoising performance of multi-wavelet and wavelet under different mode of partial discharge were analyzed by Monte-Carlo simulation. Furthermore, the capability of extracting the multi-mode partial discharges was demonstrated. The results show that, compared with wavelet, multi-wavelet depends less on the prior knowledge of partial discharge, can process partial discharge with various modes, and preserves more signal features while removing noise from the measured data. |
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Keywords:
multi-wavelets
wavelet
method of moment
multi-mode
white noise
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收稿日期 2005-12-02 修回日期 1900-01-01 网络版发布日期 |
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DOI: |
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基金项目:
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通讯作者: 钱勇 |
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作者简介: |
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作者Email: qian_yong@sjtu.edu.cn |
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| 参考文献: |
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| Copyright by 中国电机工程学报 |