Abstract: This paper describes review on a function of load frequency control (LFC) in single and two interconnected power systems. It is based on PSO concept. The proposed algorithm is used to obtain the optimal values of the proportional-integral-derivation (PID) controller parameters based load frequency control. This paper presents a load frequency controller for elimination of the power system oscillations. A two-area power system based on PSO is considered; in which every area is equipped with PID controllers. The gain value of the integral controller is tuned using iterative PSO method. Each Area is considered without controller and with controller and then oscillations are removed by PSO method. Simulations will be done in MATLAB/Simulink.
Keywords: PSO, Load Frequency, Single Area, Multi Area System etc.