| 抑制局部放电信号窄带干扰的快速算法 |
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| 引用本文： | 胡智慧,党国营,李政光.抑制局部放电信号窄带干扰的快速算法[J].广东电力,2009,22(1):30-34. |
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| 作者姓名： | 胡智慧 党国营 李政光 |
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| 作者单位： | 1. 东北电力大学,电气工程学院,吉林,吉林,132012
2. 新疆华电昌吉热电有限责任公司,乌鲁木齐,830063 |
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| 摘 要： | 为消除与抑制窄带干扰对电力设备局部放电信号在线监测的影响，提出了一种将快速傅里叶变换（FFT）与小波变换相融合的快速算法，即先对信号进行FFT，从窄带干扰背景中有效提取局部放电信号，再利用小波变换对FFT处理后的局部放电信号进一步消噪。对仿真信号和实测信号的分析结果表明，该方法对窄带干扰有较好的消噪效果，并且得到的局部放电信号失真较小。
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| 关 键 词： | 白噪声 局部放电 小波 窄带干扰 |
Fast Algorithm for Suppressing Periodic Narrowband Noise in Partial Discharge Signal |
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| HU Zhi-hui,DANG Guo-ying,LI Zheng-guang.Fast Algorithm for Suppressing Periodic Narrowband Noise in Partial Discharge Signal[J].Guangdong Electric Power,2009,22(1):30-34. |
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| Authors: | HU Zhi-hui DANG Guo-ying LI Zheng-guang |
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| Affiliation: | HU Zhi-hui, DANG Guo-ying, LI Zheng-guang (1. Electrical Engineering Inst., Northeast Dianli Univ. Jilin, Jinlin 132012, China; 2. Xinjiang Huadian Changji Thermoelectric Co., Ltd., Urumqi 830063, China) |
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| Abstract: | A new method for suppressing the periodic narrowband noise in partial discharge （PD） signal based on fast Fourier transform （FFT） and wavelet analysis is proposed in this paper. In order to exact PD signals efficiently from the violent narrowband noise, first, transform signals with FFT, then the PD signals disposed by FFT are de-noised by wavelet transform. Simulation and experimental results prove it can achieve much better results. Moreover, the distortion of PD signals is very small. |
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| Keywords: | white noise partial discharge wavelet periodic narrowband noise |
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