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| 改进经验模态分解阈值算法抑制强窄带干扰 | |
| 引用本文： | 徐其惠,曹贝贞,雷凯,张显刚. 改进经验模态分解阈值算法抑制强窄带干扰[J]. 电测与仪表, 2009, 46(10) |
| 作者姓名： | 徐其惠 曹贝贞 雷凯 张显刚 |
| 作者单位： | 1. 东方电气自动控制工程有限公司,四川德阳,618000 2. 东方汽轮机有限公司风电事业部,四川德阳,618000 |
| 摘 要： | 为抑制电力设备局部放电在线监测中出现的较强窄带干扰,提出改进经验模态分解(EMD)阈值算法,改进了频域阈值算法并解决了其阈值和干扰频带难以确定的问题.首先在频域处理时设置一个较大阈值来降低窄带干扰幅值,接着EMD以得到含有特征频率的固有模态函数(IMF),然后对IMF分量进行阈值处理,利用窄带干扰和局部放电信号在IMF分量上的特性差异来抑制窄带干扰. |
| 关 键 词： | 电力设备 局部放电 窄带干扰 经验模态分解 固有模态函数 频域阈值算法 |
Suppressing of PD Signal's Strong Narrow-band Interference Based on Empirical Mode Decomposition |
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| XU Qi-hui,CAO Bei-zhen,LEI Kai,ZHANG Xian-gang. Suppressing of PD Signal's Strong Narrow-band Interference Based on Empirical Mode Decomposition[J]. Electrical Measurement & Instrumentation, 2009, 46(10) | |
| Authors: | XU Qi-hui CAO Bei-zhen LEI Kai ZHANG Xian-gang |
| Affiliation: | XU Qi-hui1,CAO Bei-zhen2,LEI Kai1,ZHANG Xian-gang1(1.Dongfang Electric Autocontrol Engineering Co.,Ltd.,Deyang 618000,Sichuan,China.2.Wind Power Division,Dongfang Turbine Co.,China.) |
| Abstract: | To suppress strong narrow-hand interference in on-line partial discharge(PD) monitoring system of electric power apparatus,this paper investigates the threshold algorithm for Empirical Mode Decomposition(EMD),which improves the threshold value method of frequency domain and effectively resolves the problem that threshold value and interference frequency are difficult to determine in frequency domain analysis.First,the mid-signals can be produced by reducing the amplitude of narrow-band interference in frequ... |
| Keywords: | electric power apparatus partial discharge narrow-band interference empirical mode decomposition intrinsic mode functions threshold value method of frequency domain |
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