Feed-Forward Internal Model Control applied on Load Frequency control in Power System

Abstract

In an interconnected power system, both area frequency and tie-line power interchange fluctuation occurs frequently due to system parameter uncertainties modelling error and environmental disturbance. The objective of load frequency control (LFC) is to bring the steady state frequency error to zero after power demand transient and to minimize the transient deviation in these variables (both area frequency and tie-line power interchange). This paper is based on two degree of freedom (2DF) internal Model Control (IMC) with feed forward controller and IMC filter design, recently developed by Liu and Gao [5] to improve disturbance rejection and to minimize the effect of uncertainties . The feed-forward is added with Saxena and Hote [3] reported work on SOPDT model and results increasing in the robustness of the system.