Abstract
In order to study and investigate the power quality problems, this research presents the methods of wavelet transform and fourier transform with comparison between them, and consitrate on multiresolution analysis wavelet transforn to analyse the waveform of electric power quality after inter, and monitor it on the display of personal computer to detect and localize power quality disturbances. Standard Deviation is taken as a criteria to classify this disturbances.This method provides more easy and accurate idea about power quality and its disturbances
