Synchronous detector and voltage flicker signal detection based on wavelet transform

被引：0
|
作者：
Zhou, WH [1 ]
Lin, LL [1 ]
Gu, WK [1 ]
机构：
[1] Zhejiang Univ, Dept Informat & Elect Engn, Hangzhou 310013, Peoples R China
来源：
PROCEEDINGS OF THE SECOND INTERNATIONAL SYMPOSIUM ON INSTRUMENTATION SCIENCE AND TECHNOLOGY, VOL 3 | 2002年
关键词：
voltage flicker measurement; wavelet analysis; synchronous detection;
D O I：
暂无
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A new type synchronous detector is proposed, which consists of a multiplier and a subband filter constructed by wavelet multiresolution signal decomposition. By using the wavelet synchronous detector, a new method is proposed to detect the envelope signal and the modulating signal without distortion, and detect the abrupt change time of voltage flicker accurately. Furthermore, wavelet multiresolution signal decomposition is included in this method to decompose the envelope signal (or modulating signal). Wavelet expansion coefficients are used to calculate the energy and the root mean square (RMS) value of each subband, and to reconstruct the frequency components of the envelope signal. Consequently, the time-frequency characteristics of the voltage flicker signal can be shown clearly. Simulation results prove the validity and superiority of this method.
引用
收藏
页码：834 / 837
页数：4
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