Exploration of application of Continuous Wavelet Transform to power quality analysis

During the last years, the power quality (PQ) issues have been a subject of major concern. The constraints that must be fulfilled by the voltage wave supplied by utility companies have become more and more exigent. For this reason, the PQ measurement equipment requires new and computational efficient algorithms. This paper explores the application possibilities of continuous wavelet transform (CWT) to PQ analysis by means of simulation. The signature of different PQ disturbances on the signal scalogram is shown and some figures of merit are proposed in order to evaluate the quality of a given wave.