An Optimal Fractional Order PI Controller-Based Shunt Active Power Filter Design for the Improvement of the Quality of Power

The power quality problem is an issue for the power system. Harmonics are one of the prime reasons for power quality. In eliminating harmonics and improving the quality of power, shunt active power filters play a vital role. It is observed that the performance of these filters is dependent on the control strategies used to extract harmonic current from the system, maintain DC-link voltage, and generate compensation current. In this regard, researchers are interested in the development of new methodologies that can enhance the existing control strategy and improve the performance of these filters. In this attempt to improve the performance of shunt active filters, in this study, an optimal fractional order propositional integral controller is suggested. The suggested controller is designed by tuning the controller gain by minimizing the error signal. For the minimization of error, the Kho-Kho optimization scheme is utilized. The performance of the suggested controller is examined with a simulation system developed in MATLAB/SIMULINK. Based on the results, it is observed that the suggested controller can effectively maintain the DC-link voltage and minimize the harmonics.