A study on load frequency control combining a PID controller and a disturbance observer

In this paper, we propose a designing method of a load frequency control combining a PID controller and a disturbance observer to deal with large scale wind power generations introduced in power systems, and to try to offset the influence of the disturbances produced by the wind power generations. We determine the PID gains via the quasi pole placement method. As an example, we design a case for a two-area system, and carry out simulations to compare the proposed method with the conventional method (with integral controller only). As for the result of the simulations, we can confirm the validity of the proposed method.