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Classification of power system disturbances using a fuzzy expert system and a Fourier linear combiner

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4 Author(s)
Dash, P.K. ; Centre for Intelligent Syst., Regional Eng. Coll., Rourkela, India ; Mishra, S. ; Salama, M.M.A. ; Liew, A.C.

This paper presents a hybrid scheme using a Fourier linear combiner and a fuzzy expert system for the classification of transient disturbance waveforms in a power system. The captured voltage or current waveforms are passed through a Fourier linear combiner block to provide normalized peak amplitude and phase at every sampling instant. The normalized peak amplitude and computed slope of the waveforms are then passed on to a diagnostic module that computes the truth value of the signal combination and determines the class to which the waveform belongs. Several numerical tests have been conducted using EMTP programs to validate the disturbance waveform classification with the help of the new hybrid approach which is much simpler than the recently postulated ANN or wavelet based approaches

Published in:

Power Delivery, IEEE Transactions on  (Volume:15 ,  Issue: 2 )

Date of Publication:

Apr 2000

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