Damping inter-area modes of oscillation using an adaptive fuzzy power system stabilizer |
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Authors: | T HusseinAuthor Vitae MS SaadAL ElshafeiAuthor Vitae A BahgatAuthor Vitae |
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Affiliation: | Electrical Power and Machines Department, Cairo University, Gama Street, Giza, Egypt |
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Abstract: | This paper introduces an indirect adaptive fuzzy controller as a power system stabilizer used to damp inter-area modes of oscillation following disturbances in power systems. Compared to the IEEE standard multi-band power system stabilizer (MB-PSS), indirect adaptive fuzzy-based stabilizers are more efficient because they can cope with oscillations at different operating points. A nominal model of the power system is identified on-line using a variable structure identifier. A feedback linearization-based control law is implemented using the identified model. The gains of the controller are tuned via a particle swarm optimization routine to ensure system stability and minimum sum of the squares of the speed deviations. A bench-mark problem of a 4-machine 2-area power system is used to demonstrate the performance of the proposed controller and to show its superiority over other conventional stabilizers used in the literature. |
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Keywords: | Fuzzy logic system Fuzzy identification Feedback linearization Variable-structure algorithm Swarm optimization technique |
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