Comparison of Performance Analysis of Optimal Controllers for Frequency Regulation of Three-Area Power System

摘要

The purpose of this paper is to present the solution of load frequency regulation problem of three-area power system comprising of thermal turbines in each control area. The controllers namely proportional integral (PI), proportional integral derivative (PID) controller, fractional order proportional integral derivative (FOPID) controller, and sliding mode controller (SMC) have been used to solve the automatic generation control problem in the present work. The gains of these controllers have been tuned using disrupted oppositional learned gravitational search algorithm (DOGS A) which exhibit the features of exploration and exploitation of the search space to obtain more optimal solution. The optimal controller gains minimize the deviations in frequency and tie-line power of the system under study. From simulation results, it has been deduced that the optimized sliding mode controller shows improved performance in terms of settling time, peak overshoot/undershoot, damping ratio and fitness function value as compared to other tuned conventional controllers.