CDM application on power system as a load frequency controller

This paper presents a new load frequency control (LFC) design using the coefficient diagram method (CDM). The CDM technique has been designed such that the effect of the uncertainty due to governor and turbine parameters variation and load disturbance is reduced. A frequency response dynamic model of a single-area power system is introduced, and physical constraints of the governors and turbines are considered. Digital simulations for a single area power system are provided to validate the effectiveness of the proposed scheme. The results show that, with the proposed CDM technique, the overall closed loop system performance demonstrated robustness in the face of uncertainties due to, variations of the parameters of governors and turbines, and loads disturbances. A performance comparison between the proposed controller and a classical integral control scheme is carried out confirming the superiority of the proposed CDM technique.