Linear H∞ control of a synchronous generator

In this paper, a method for designing controller in power systems to damp power system oscillations is suggested. The problem is formulated in linear matrix inequalities framework and results in an output feedback controller that is tuned by the usage of LMI approach. Mostly, the classical methods are used to tune the 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. In this paper, the fifth order model of the synchronous generator is used. Therefore, the effects of damper winding in the modeling are considered. Simulation results show the effectiveness, robustness and good performance of the controller.