International Conference on Mechanical Engineering and Technology (ICMET-London 2011)
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Voltage flicker is a major concern of power utility for providing power quantity to consumers. A new technique for estimating flicker voltage envelope is presented in this paper. The technique is based on modeling the flicker voltage as a linear combination of orthogonal sinusoids. A recursive difference equation of the voltage flicker is used to find the linear coefficients. Fuzzy rule-based logic and Hilbert transform are used to estimate signal parameters.