Load frequency control in power system using feed-forward internal model control

In an interconnected power system, both tie-line power switching and area frequency fluctuation occurs frequently due to system parameter uncertainties modeling error and environmental disturbance. The load frequency control (LFC) is concentrated on to minimize the transient deviation in these variables (both tie-line power switching and area frequency) and when power demand transient, to bring the steady state frequency error to zero. This paper is worked on two degree of freedom (2DF) internal Model Control (IMC) with feed forward controller and IMC filter design, recently developed by Liu and Gao [3] to improve disturbance rejection and to minimize the effect of uncertainties. The feed-forward is added with Saxena and Hote [4] reported work on SOPDT model and results increasing in the robustness of the system.