| 基于小波变换的间谐波检测与去噪 |
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| 引用本文： | 杨念念,赵不贿,冯俊青.基于小波变换的间谐波检测与去噪[J].微计算机信息,2010(7). |
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| 作者姓名： | 杨念念 赵不贿 冯俊青 |
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| 作者单位： | 江苏大学电气信息工程学院; |
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| 摘 要： | 间谐波是一种特殊的谐波,它的大量存在对电能质量造成了污染,因而对其进行检测和分析具有十分重要的意义。文中分析了小波变换的特性及用于间谐波检测的优势,采用了正交小波多分辨率分析算法检测间谐波,并选择小波阈值法对信号进行去噪处理。仿真结果表明,小波变换具有良好的时频特性,能有效检测出信号中所含各频率成分,并且能有效的抑制和消除噪声。随着小波理论的进一步发展和完善,其在电能质量信号检测方面的应用将越来越广泛。
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| 关 键 词： | 间谐波 小波变换 多分辨率分析 小波阈值去噪 |
The Detecting and Denoising of Interharmonics based on Wavelet Transform |
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| YANG Nian-nian ZHAO Bu-hui FENG Jun-qing.The Detecting and Denoising of Interharmonics based on Wavelet Transform[J].Control & Automation,2010(7). |
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| Authors: | YANG Nian-nian ZHAO Bu-hui FENG Jun-qing |
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| Affiliation: | YANG Nian-nian ZHAO Bu-hui FENG Jun-qing(School of Electrical , Information Engineering,Jiangsu University,Zhenjiang Jiangsu,212013,China) |
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| Abstract: | Interharmonic is a special kind of harmonic,the power quality was polluted for the widely existing of it.The paper analyzed the characters of wavelet transform and gave its advantages on detecting interharmonics.The multi-solution algorithm was adopted to implement the detection of the interharmonics,and the added-whitenoise of the signal was dealed with by wavelet soft-threshold.The simulation results showed that wavelet transform had well time-frequency characters,it can not only detect all the harmonics ... |
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| Keywords: | Interharmonics Wavelet transform Multi-resolution analysis threshold denoising |
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