Power system stabilizer design using H∞ robust technique to enhance robustnesse of power system

High performance excitation systems have become very important as limited generation capacity and consumer needs for power continue to increase. This work aims to develop a robust control technique based on H∞ loop-shaping optimization method, applied to a Power System Stabilizer (PSS) to improve transient and dynamic stabilities of a turbo-alternator connected to an infinite bus system. In this paper, a robust controller is designed and simulated under Matlab-Simulink. The robust power system stabilizer (RPSS) is designed using the concept of H∞ loop shaping design which is one of the robust control methods used for designing the controllers for dynamical systems in electrical engineering. Guidance for loop shaping and synthesis of the robust controller are also presented along with the selection of the weighting functions. Comparisons are also made between the Conventional Russian power system stabilizer with a strong action (CPSS) and (RPSS). The simulation results show the effectiveness of the proposed method for a stabilizer using the concept of H∞ control, by improving the performances and the robustness.