Measurement of power systems harmonics using QMF filter banks

Author

Koleva, Ljubica ; Taskovski, Dimitar ; Dimcev, Vladimir

Author_Institution

Fac. of Electr. Eng. & Inf. Technol., Ss Cyril & Methodius Univ. - Skopje, Skopje, Macedonia

fYear

2011

fDate

17-19 Oct. 2011

Firstpage

1

Lastpage

4

Abstract

In this paper the influence of different wavelet filters on the harmonic analysis of power system waveforms is investigated. For this aim, wavelet packet transform-based algorithm for rms measurement is implemented. Besides commonly used Daubechies filters, Vaidyanathan with 24 coefficients and Coiflets the influence of several Johnston´s filters with different characteristics is examined. Experimental tests are performed under different conditions, in case of stationary signals with different harmonics components and in case of non-stationary harmonics distortion. Experimental results show that Johnston´s filters outperform the commonly used wavelet filters for harmonic analysis.

Keywords

harmonic distortion; power harmonic filters; power system harmonics; wavelet transforms; Daubechies filters; Johnston filters; QMF filter banks; harmonic analysis; harmonic components; nonstationary harmonics distortion; power system harmonic measurement; power system waveforms; rms measurement; wavelet filters; wavelet packet transform-based algorithm; Filter banks; Harmonic analysis; Multiresolution analysis; Power harmonic filters; Wavelet transforms; Johnston filters; harmonic analysis; wavelet packet transform;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Power Quality and Utilisation (EPQU), 2011 11th International Conference on

Conference_Location

Lisbon

ISSN

2150-6647

Print_ISBN

978-1-4673-0379-8

Type

conf

DOI

10.1109/EPQU.2011.6128941

Filename

6128941