Application of a new multi-variable feedback linearization method for improvement of power systems transient stability

This article investigates the application of a multi-variable nonlinear controller to the model of a power system. The proposed controller is based on the feedback linearization concept and its main goal is improvement of transient stability and voltage regulation at post-fault conditions. It will be shown that the controller enhances first swing stability and system damping under large disturbances as well as improves terminal voltage regulation. The response of the system is simulated on a test system in the presence of three-phase short circuit at terminal of the synchronous generator and compared to the performance of the standard IEEE type-1 voltage regulator, PSS and PID speed regulator.