Robust Tuning of PSS Parameters Using the Linear Matrix Inequalities Approach

This paper suggests a method for designing PSS to damp power system oscillations. The method is based on H infin control theory. The problem is formulated in LMI framework and results in a PED output feedback controller that is tuned by the usage of LMI approach. Mostly, the classical methods are used to tune a PED controller, but in this paper an H infin approach is used to guarantee the robustness of the given controller. Furthermore, the method results in a simple and practical controller which is so easy for implementing in practice. The performance of the controller is tested on a sample synchronous generator connected to an infinite bus system. Simulation results show the effectiveness, robustness and good performance of the controller.