Fuzzy Fractional Order PID Controller Design for AVR System

An automated voltage regulator (AVR) is a feedback control system that examines the output voltage of generator, compares it to a predetermined value, and outputs an error signal that is used to modify excitation of the generator. In this manuscript, Fuzzy logic-based fractional order PID controller (Fuzzy-FOPID) is designed for the AVR problem. The parameters of the controller are tuned with a newly introduced metaheuristic optimization algorithm, known as Firebug Swarm optimization (FSO). When compared to other types of controllers described in the literature, the effectiveness of the FSO-tuned Fuzzy-FOPID controller performs the most effective control. The optimized gains of the proposed controller are evaluated on two different types of objective functions Integral Absolute Error (IAE) and Integral of time multiplied absolute error (ITAE). The output of the MATLAB simulation demonstrates the superiority of the suggested controller for the AVR system in terms of the per unit terminal voltage (TV) of the alternator.