| 变压器局放信号监测中白噪声和周期干扰的抑制 |
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| 引用本文： | 李茂军,刘建明.变压器局放信号监测中白噪声和周期干扰的抑制[J].长沙理工大学学报(自然科学版),2007,4(2):45-48,62. |
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| 作者姓名： | 李茂军 刘建明 |
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| 作者单位： | 长沙理工大学,电气与信息工程学院,湖南,长沙,410076 |
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| 基金项目： | 湖南省自然科学基金
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湖南省教育厅资助项目 |
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| 摘 要： | 针对电力变压器在线监测的局放信号中包含各种干扰的问题,提出使用小波包的方法去除局放信号中的白噪声干扰,使用数字陷波滤波器去除局放信号中的周期窄带干扰,并用MATLAB 7.0进行了仿真研究.理论分析和仿真试验说明使用这两种方法能较好地达到去干扰的目的.
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| 关 键 词： | 局部放电 小波包 白噪声 数字陷波器 周期窄带干扰 |
| 文章编号： | 1672-9331（2007）02-0045-04 |
| 修稿时间： | 2006-09-05 |
Suppression of white noise and periodical narrow-band noise for on-line partial discharge monitoring of transformer |
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| LI Mao-jun,LIU Jian-ming.Suppression of white noise and periodical narrow-band noise for on-line partial discharge monitoring of transformer[J].Journal of Changsha University of Science and Technology:Natural Science,2007,4(2):45-48,62. |
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| Authors: | LI Mao-jun LIU Jian-ming |
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| Affiliation: | College of Electrical and Information Engineering,Changsha University of Science and Technology, Changsha, 410076, China |
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| Abstract: | Focused on several kinds of interferences in the partial discharge(PD) signals of transformer,wavelet packet based method is proposed to suppress the white noise;the digital trap filter is designed to suppress the periodical narrow-band interference.The simulation research is given in Matlab 7.0.Both theory analysis and simulation result show that the above methods could suppress the interferences in the PD signals well. |
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| Keywords: | partial discharge wavelet-packet white-noise digital trap filter periodical narrow-band interference |
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