The siting of numerous generator units in distribution areas is being encouraged by the current deregulation of the industry is likely to have an impact on the frequency regulation of the existing power systems, which designed to operate with large and central generating facilities. An approach based on µ-synthesis technique is proposed for the design of robust load frequency controller in response to the new Load Frequency Control (LFC) technical demand for multi-machine power systems. An example for a multimachine area is given to illustrate the proposed approach. The resulting controller is shown to minimize the effect of disturbances and achieve acceptable frequency regulation in presence of uncertainties and load variation.
