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Fuzzy Applications in a Multi-Machine Power System Stabilizer
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 Title & Authors
Fuzzy Applications in a Multi-Machine Power System Stabilizer
Sambariya, D.K.; Gupta, Rajeev;
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This paper proposes the use of fuzzy applications to a 4-machine and 10-bus system to check stability in open conditions. Fuzzy controllers and the excitation of a synchronous generator are added. Power system stabilizers (PSSs) are added to the excitation system to enhance damping during low frequency oscillations. A fuzzy logic power system stabilizer (PSS) for stability enhancement of a multi-machine power system is also presented. To attain stability enhancement, speed deviation () and acceleration () of the Kota Thermal synchronous generator rotor are taken as inputs to the fuzzy logic controller. These variables have significant effects on the damping of generator shaft mechanical oscillations. The stabilizing signals are computed using fuzzy membership functions that are dependent on these variables. The performance of the fuzzy logic PSS is compared with the open power system, after which the simulations are tested under different operating conditions and changes in reference voltage. The simulation results are quite encouraging and satisfactory. Similarly, the system is tested for the different defuzzification methods, and based on the results, the centroid method elicits the best possible system response.
Fuzzy Logic;Fuzzy Set Theory;Multi-Machine System;Power System Stabilizer;Different De-fuzzification Methods;Simulink;
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