Hassan Bevrani - West Regional Electric Co. Research & Standard Office Kermanshah, IranT
Hossein Bevrani - Tabriz University Department of Mathematics abriz, Iran

The electric power industry is in transition from large, vertically integrated utilities providing power at regulated rates to an industry that will incorporate competitive companies selling unbundled power at lower rates. The new structure of electric power systems which will include separate generation, transmission and distribution companies with an open access policy, will demand novel control strategies to maintain the reliability and eliminates the frequency error. The paper addresses the design and introduce of a reduced load frequency controller based on gsynthesis theorem for a possible structure in the new deregulated open-access environment. A method is given to reduce the size of the controller using the singular values of the observability matrix of the high order gcontroller.

Load Frequency Controller, u-Synthesis, Model reduction