Short Duration Voltage Variation Characterization through Wavelet Analysis

A wavelet-based energy content method for short duration voltage variation characterization identification during power quality disturbance is provided in this paper. The main advantage of the proposed scheme is that it uses wavelet analysis to zoom into a high frequency band for the time information, and the fundamental frequency band for the magnitude change. Also, it is shown to be effective even for very short interruption, which is difficult to determine using the RMS method. Compared to other wavelet methods, its low computational requirement makes it suitable for real-time application. Dynamic simulations were used to demonstrate the capability of this method.