Abstract
In this work, an efficient fuzzy logic controller is used to improve the controllability of a SVC (static var compensator). The SVC device is a member of the FACTS (flexible alternating current transmission system) family employed in power transmission systems. The new fuzzy logic controller replaces the existing PI regulator and permits better disturbance compensation and voltage regulation. The SVC is used to maintain the voltage bus constant by absorbing or injecting reactive power. The proposed fuzzy controller uses the error between the reference voltage and the measured voltage to determine the required susceptance B. The fuzzy controller has been implemented in MATLAB/SIMULINK and the effectiveness of the reactive power compensation and the voltage regulation are demonstrated by simulations.
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