Stabilization of power system using variable structure output feedback control

This paper presents a new output feedback variable structure power system stabilizer for a single-machine infinite-bus system. The stabilizer design is accomplished using extra dynamics in the form of a dynamic compensator. The method of equivalent control is used to describe the "augmented reduced order system" in the "sliding mode". Due to the reduction of order of the system in the sliding mode, the order of the compensator is usually less than the order of the compensator given by the Kimura-Davison formula. A numerical example is worked out and the performance of the machine is investigated using different stabilizers to illustrate the effectiveness of the proposed design.