Load frequency controller design via GSO algorithm for nonlinear interconnected power system

Glow Swarm Optimization(GSO) and Particle Swarm Optimization(PSO) algorithms are proposed in this paper for optimal tuning of PI controllers for Load Frequency ControUer(LFC) design. To visualize the effectiveness of the proposed method, a two area interconnected power system is considered as a test system. To prove the robustness of the proposed controller and to stabilize the frequency of oscillations, the design process takes a large range of operating conditions and system nonlinearities in to account. The simulation results emphasis on the superiority of GSO algorithm over BAT and Simulated Annealing (SA) in tuning PI controller parameters with the help of different performance indices. The result analysis demonstrate that the proposed algorithm achieves robust performance for different load perturbations in second as well as both areas as compared to BAT and SA approaches.