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This paper presents a wavelet analysis based time-frequency technique to identify power system transients and disturbances. A mother wavelet basis function (Littlewood- Paley (L-P)) with dyadic non-overlapping frequency hands has been used. The advantage of the proposed approach is in identification of the occurrence and duration of the disturbances. A few power signals with power quality disturbances have been analysed to show the effectiveness of the proposed technique.
Basu, Malabika and Basu, Biswajit :Application of wavelet transform to power quality (PQ) disturbance analysis. Proceedings of the Second International Conference on Power Electronics and Machine Drives (PEMD), Edinburgh, 31st. March-2 April 2004, pp.269-273.