Load frequency control of Multi-area Power System in Deregulated Environment

Abstract

Large scale technological developments in the power sector have made the electric power network more complex. This has led to the restructuring of the entire power network which has created new issues related to the stability of the system. One of them is frequency control. The objective of this work is to solve frequency control problem in a two area restructured system with two GENCOS and two DISCOS in each area. In order to prevent the violation of generation limits a Generation rate constraint has been imposed on the turbine. A linear quadratic regulator has been designed and the system is evaluated with and without contract violations. Comparison between the conventional system without GRC and the proposed system including GRC is made. Simulation results reveal that the proposed LQR controller is able to perform well when GRC is included in the system.