Wavelet-Fourier analysis of electric signal disturbances

Abstract

The Fourier transform usually has been used in the past for analysis of stationary and periodic signals. Its  interest  is  the  knowledge  of  spectral  components  existing  in  a  waveform;  it  doesn't  matter  the  moment  where they happen. However, when the time localization of   the   spectral   components   is   needed,   the   Wavelet   Transform  (WT)  can  be  used  to  obtain  the  optimal  time-frequency  representation  of  the  signal.  In  this  paper,  the  joint  wavelet-Fourier  transform  has  been  proposed  for  detecting,      analyzing      and      compacting      electrical      disturbances.  Finally,  results  of  experiments  have  been  included.