An Adaptive Mamdani Fuzzy Logic Based Controller for a Static Compensator in a Multimachine Power System

Salman Mohagheghi
Ganesh K. Venayagamoorthy, Missouri University of Science and Technology
Ronald G. Harley

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An adaptive Mamdani based fuzzy logic controller has been designed for controlling a static compensator (STATCOM) in a multimachine power system. Such a controller does not need any prior knowledge of the plant to be controlled and can efficiently control a STATCOM during different disturbances in the network. A model free approach using the controller output error is applied for training purposes that adaptively changes the controller output parameters based on a gradient descent method. Moreover, shrinking span membership functions are used for a more stable and accurate control performance. Simulation results show that the proposed controller outperforms the conventional PI controller during dynamic and transient disturbances.