Application of wavelets to model short-term power system disturbances

Abstract

This paper presents an advanced mathematical tool for the analysis of power system disturbances. Disturbances that are nonperiodic require a more powerful mathematical technique than the Fourier series. The "wavelet transformation" is one such tool that can be used. The wavelet transform translates the time-domain function into a representation localized not only in frequency but also in time. In this paper, the theory is applied to model several short term events like a capacitor switching transient, an autoreclosure, and a voltage dip.