A Whale Optimization Algorithm Based Shunt Active Power Filter for Power Quality Improvement

In this paper, a Whale Optimization Algorithm (WOA) based PI controller is designed for Shunt Active Power Filter (SAPF). For estimating the harmonic current injected in source by non-linear load, self-tuning filter is used. To control the DC-link voltage to a constant value, a PI controller is used. The gains of the controller (KP and KI) are tuned using WOA such that tracking performance can be improved. While for generating gate signal a simple Pulse Width Modulation (PWM) technique has been used. To verify this control method a simulation model has been designed and simulated in MATLAB/SIMULINK. The obtained results are compared with the conventional method used for obtaining the parameter values of this controller. The result shows that this proposed method gives better results in suppressing the harmonic pollution in the system.