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Fuzzy logic power system stabilizer in multimachine stability studies

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4 Author(s)
Moodley, G.V. ; Dept. of Electr. Eng., Natal Univ., Dalbridge, South Africa ; Jennings, G.D. ; Harley, R.G. ; Wishart, M.T.

Power system stabilizers (PSS) work well at the particular network configuration and steady state conditions for which they were designed. Once conditions change, their performance degrades. This can be overcome by an intelligent nonlinear PSS based on fuzzy logic. Such a fuzzy logic power system stabilizer (FLPSS) is developed, using speed and power deviation as inputs, and provides an auxiliary signal for the excitation system of a synchronous motor in a multimachine power system environment. The FLPSS's effect on the system damping is then compared with a conventional power system stabilizer's (CPSS) effect on the system. The results demonstrate an improved system performance with the FLPSS and also that the FLPSS is robust

Published in:

AFRICON, 1996., IEEE AFRICON 4th  (Volume:2 )

Date of Conference:

24-27 Sep 1996