GWO Algorithm Based Fuzzy-PID Controller with Derivative Filter for Load Frequency Control of Multi-Source Hydrothermal Power System

In this paper, a novel Grey Wolf Optimizer (GWO) algorithm based fuzzy PID controller with derivative Filter (Fuzzy-PIDF) is proposed for load frequency control (LFC) of a two-area multisource power system with each area consisting of a reheat thermal and a hydro unit. The conventional controllers UPI and the also the PID controller with derivative filter (PIDF) are implemented for comparative analysis of the LFC performance. The superiority of the GWO algorithm is demonstrated by comparing the results of GWO optimized integral controller, as applied for LFC of the system under consideration, against some of the recently published modern heuristic optimization techniques. Among all the controllers implemented here, the proposed GWO optimized Fuzzy-PIDF controller exhibits the best performance. Modeling and simulations are carried out using Matlab/Simulink (R).