An approach based on µ -synthesis tools is proposed for the design of robust load frequency controller for electric power system in deregulated environment. In this paper, we consider the system (area) as a collection of independent generation, transmission and distribution companies and Connections between this area and the rest of the system are taken as disturbances. An example is given to illustrate the proposed approach. The resulting controller is shown to minimize the effect of disturbances and achieve acceptable frequency regulation.
