Comparison of existing LFC control simulation approaches in a deregulated environment

Any power system has a fundamental control problem of matching real power generation to load plus losses, a problem called load frequency control ( LFC) or frequency regulation. The purpose of load frequency control is tracking of load variation while maintaining system frequency and tie line power interchanges close to specified values. With introduction of the deregulation policy to the power system operation, a lot of interests have been recently refocused on the LFC. That is because the conventional controllers are incapable of obtaining good dynamical performance, then, it comes the need for novel control strategies to maintain the reliability and eliminates the frequency error. Recently, under deregulated organizations, several notable LFC scenarios based on classical, robust/adaptive and intelligent control theorems have been proposed. In this paper, by using of obtained results, the authors make varies comparisons between these approaches and discuss the main advantages and disadvantages of these methods.