A Novel Approach for the Study of Complex Electrical Signals using S-Transform

The use of solid state devices and equipments are increasing rapidly in electrical systems. Some of these solid state components introduce harmonics in the system. As a result the signals in electrical systems deviate from being a pure sinusoidal one. Quite often signals become very complex and their equations are unknown. Analysis of these complex signals is mainly accomplished using various kinds of signal analysis tools, like, Short-Time Fourier Transform (STFT) and Wavelet Transform (WT). But these methods do not provide any information using which an equation of a complex waveform can be determined. S-Transform, an enhancement of STFT and WT, and with improved properties, provides the necessary information which have been employed in this paper to determine the equation of a complex electrical signal.