Analysis of non‐stationary signals in power systems
ISSN: 0332-1649
Article publication date: 1 June 2004
Abstract
Classical techniques to estimate the spectrum of the multi‐component signal are based on Fourier‐based transformations. The frequency estimates obtained from their spectral peaks are affected by the window length and phase of signal component, thus presenting a large variance even in the absence of noise. The spectrum of the signals is estimated with the help of the Wigner‐Ville distribution and its time‐frequency representation is obtained. For the same purpose, the min‐norm method (subspace method) is used. The accuracy of the tested methods was investigated and compared with the parameters of the frequency estimation via FFT. The proposed methods were also tested with non‐stationary multiple‐component signals occurring during the fault operation of inverter‐fed drives and transmission lines.
Keywords
Citation
Leonowicz, Z. (2004), "Analysis of non‐stationary signals in power systems", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 23 No. 2, pp. 381-391. https://doi.org/10.1108/03321640410510550
Publisher
:Emerald Group Publishing Limited
Copyright © 2004, Emerald Group Publishing Limited