A harmonic detection method for power network based on wavelet transform Mallat algorithm

Autor: LEI Ruhai, HAO Zhe
Jazyk: čínština
Rok vydání: 2014
Předmět:
Zdroj: Gong-kuang zidonghua, Vol 40, Iss 12, Pp 65-69 (2014)
Druh dokumentu: article
ISSN: 1671-251X
1671-251x
DOI: 10.13272/j.issn.1671-251x.2014.12.017
Popis: For the problem that traditional Fourier transform method caused big errors when analyzing power signals of power network under unstable running condition, a harmonic detection method for power network was proposed based on wavelet transform Mallat algorithm. Firstly, power signals are separated into different sub frequency bands according to resolutions. Then each sub frequency band is reconstructed to get fundamental wave of original signal. Finally, the reconstructed signal of fundamental wave is subtracted from the sampled original signal so as to get harmonic signal. The Matlab simulation results show that the method can separate harmonic signal from fundamental wave of power signal with high precision of harmonic detection.
Databáze: Directory of Open Access Journals
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