Fractional Order Automatic Generation Controller For A Multi Area Interconnected System Using Evolutionary Algorithms

This paper presents the implementation of Fractional Order PID controller as a supplementary controller to improve the dynamics of Load Frequency Control in an interconnected Power System. FOPID is a PID controller whose integral and derivative orders are of non-integer rather than integer. The extension of integration and derivative order from integer to fractional order provides more flexibility in the design of the controller there by improving the dynamics of the system. Using integral square error as performance criteria to be optimized, the FOPID controller parameters are optimized using Cat Swarm Optimization (CSO). The performance obtained with CSO is compared with PSO. The simulation results demonstrate that CSO has much better performance than PSO. Simulations have been performed using MATLAB/Simulink on a Three area interconnected Power System.