A novel approach to improve automatic generation control of a two-area power system considering frequency bias factor

In this paper, a novel approach is presented to find the optimal adjustment of Automatic Generation Control (AGC) system in a two-area power system. In the proposed method, a newly developed harmony search algorithm is implemented to solve the non-convex non-linear problem of AGC. In order to show efficiency of the proposed approach, the response of HSA-Optimized system to disturbances is compared with the results of GA-Optimized system. The cost function of the proposed problem is considered based on Integral of Time Multiplied Square Error (ITSE). In order to improve the system performance, frequency bias factor (FBF) is modeled in the problem and the proposed method is implemented in a non-linear interconnected two area power system. Simulation results verified that employing the proposed approach in optimization process of control system would guarantee a better system performance comparing to other methods.