Abstract
An integrated fuzzy logic generator controller has been proposed in this paper for the stabilization of power systems through the generator excitation control and the speed governing control. The proposed controller has three control loops: the first one is the voltage control loop which has the function of automatic voltage regulator (AVR), the second one is the damping control loop which has the function of power system stabilizer (PSS), and the last one is the speed control loop which has the function of governor (GOV). A simple fuzzy logic control scheme has been applied to all these three control loops. The control scheme is simple enough so as not to require intensive computation for the controller, therefore, its real time application is feasible. The effectiveness has been demonstrated through non-linear simulations using a longitudinal four machine infinite bus system with multi-mode oscillations. Comparison studies have also been performed to show the advantages of the proposed controller with conventional excitation and speed-governing control systems.
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