WAVELETS AND ELECTROMAGNETIC POWER-SYSTEM TRANSIENTS

The wavelet transform is introduced as a method for analyzing electrom agnetic-transients associated with power system faults and switching. This method, like the Fourier transform, provides information related to the frequency composition of a waveform, but it is more appropriate than the familiar Fourier methods for the non-periodic, wide-band sig nals associated with electromagnetic transients. It appears that the f requency domain data produced by the wavelet transform may be useful f or analyzing the sources of transients through manual or automated fea ture detection schemes. The basic principles of wavelet analysis are s et forth, and examples showing the application of the wavelet transfor m to actual power system transients are presented.