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《Transactions of China Electrotechnical Society》 2001-06
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Power Quality Detection Using Wavelet-Multiresolution Signal Decomposition

Zhou Wenhui Li Qing Zhou Zhaojing(China Institute of Metrology 310034 China)  
This paper proposes a novel method of power quality detection and analysis using wavelet multiresolution signal decomposition and a novel synchronous detector using wavelet filter instead of traditional low pass filter.In the proposed method,the distorted signal data were cut up into different frequency subbands,and then we can detect time,frequencies and amplitudes of the distorted signals in the wavelet domain.Because of having outstanding time frequency localization characteristics,this method can be used in transient distorted signal detection and analysis.The results of simulation show that this method has good detection performance,and it can detect different power quality problems efficiently,such as voltage sag and swell,momentary interrupt,harmonic distortion of short duration,transient harmonic destortion and voltage flickers.
【CateGory Index】: TM711
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