Whale optimization algorithm to tune PID and PIDA controllers on AVR system

Abstract

Power system stability is improved through using Automatic Voltage Regulator (AVR) to adjust the terminal voltage of synchronous generator. Proportional-Integral-Derivative (PID) and Proportional-Integral-Derivative-Acceleration (PIDA) controllers are used in AVR for excitation control. Whale optimization algorithm (WOA) technique is used in this paper to tune the controllers’ parameters. WOA using PID and PIDA controllers show its superiority through comparison with several optimization techniques. Then comparison between both controllers is carried out and shows that PIDA controller is better than PID controller. Therefore, WOA using PIDA controller is the best system. Robustness analysis is performed to check terminal voltage response with load variation and proved again the superiority of WOA-PIDA system. The contribution of the paper is mainly in analysis by using Root Locus and Bode diagram beside using new optimized controller system in this application.