Comparison between discrete STFT and wavelets for the analysis of power quality events

Abstract:

This paper deals with the comparison of signal processing tools for power quality analysis. Two signal processing techniques are considered: the wavelet filters and the discrete short-time Fourier transforms. Then, examples of the two most frequent disturbances met in the power system are chosen. It is designed an adjustable speed drive with a six-pulse converter using EMTP/ATP and it is presented normal energizing of utility capacitors. The analysis is tested on a system consists of 13 buses and is representative of a medium-sized industrial plant. Finally, each kind of electrical disturbance is analyzed with example representing each tool. A qualitative comparison of results shows the advantages and drawbacks of each signal processing technique applied to power quality analysis. © 2002 Elsevier Science B.V. All rights reserved.

Año de publicación:

2002

Keywords:

• Power Quality
• wavelet transforms
• Discrete short-time Fourier transforms

Fuente:

scopus