Optimal and Suboptimal Linear Regulator Design of AGC for Two Area Interconnected Power System

This paper presents an AGC optimal regulator utilizing feedback control method which is designed for two area interconnected power system. In the proposed paper, power systems with the same steam power plants including non-reheat steam turbines which are connected together parallel through AC/DC lines, have been studied. It is notable that, the problem of formulating an optimal AGC is to solve non-linear matrix equations, which needs appropriate calculating techniques in order to find a high speed and accurate solution. Meanwhile, to design an AGC optimal regulator, monitoring of all system state variables is needed which probably is not economical and also some of the state variables are not measurable practically. Due to mentioned problems an AGC sub-optimal regulator based on the feedback control method using system states which are easy to measure is presented in this paper and dynamic performance of the power system with AGC optimal and suboptimal regulator implementation and in more than 1% disturbance in one of the areas has been studied and system dynamic response using both regulators (optimal and suboptimal) has been probed and compared with each other.