Wavelet transforms in power systems. I. General introduction to the wavelet transforms

This tutorial gives an introduction to the field of the wavelet transform. It is the first of two tutorials which are intended for engineers applying or considering to apply WTs to power systems. They show how the WT-a powerful new mathematical tool-can be employed as a fast and very effective means of analysing power system transient waveforms, as an alternative to the traditional Fourier transform. The focus of the tutorials is to present concepts of wavelet analysis and to demonstrate the application of the WT to a variety of transient signals encountered in electrical power systems.