Enhancement Of Power System Stability Using Fuzzy Logic Based Power System Stabilizer
نویسندگان
چکیده
Electromechanical oscillations in a power system often exhibit poor damping when the power transfer over a corridor is high relative to the transmission strength. Traditional approaches to aid the damping of power system oscillations include the use of Power System Stabilizers (PSS). Power system stabilizers are used to generate supplementary control signals for the excitation system in order to damp out the low frequency power system oscillations. This paper describes the design procedure for a fuzzy logic based PSS (FLPSS). Speed Deviation of a synchronous machine and its derivative are chosen as the input signals to the FLPSS. The inference mechanism of the fuzzy logic controller is represented by 49 ifthen rules. The proposed technique has the features of a simple structure, adaptivity and fast response and is evaluated on a Single machine and Multi machine Power system under different operating conditions to demonstrate its effectiveness and robustness. Keywords— Power system oscillations, Power system stabilizer(PSS), Fuzzy logic based PSS (FLPSS), Conventional PSS (CPSS).
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