Comparative study of classical controllers for LFC of an isolated hybrid distributive generation system

Abstract

In this paper, load frequency control of an isolated hybrid distributive generation (IHDG) following small step load perturbation is analyzed. A powerful quasi-opposition harmony search algorithm has been used for optimization of the controller gains of the studied IHDG model. Performance of some of the classical controllers such as integral (I), proportional–integral (PI), integral–derivative (ID) and proportional–integral–derivative (PID) are compared in the present work. The simulation results show that better control performance in terms of overshoot and settling time has been achieved by choosing PID controller among the other classical controllers considered (such as I, PI and ID). Sensitivity analysis has also been carried out for testing the robustness of the PID controller.

Keywords: Harmony search algorithm; isolated hybrid distributive generation; load frequency control; PID controller