A Backstepping Sliding Mode Dual-Excitation and Steam-Valving Control of Synchronous Generators

Abstract

A nonlinear dual-excited and steam-valving controller for synchronous generators based on a combination of backstepping and sliding mode control methods is presented in this paper. The proposed controller is designed to enhance the power system stability and voltage and frequency regulation of an electric power system. This strategy is capable of achieving the desired dynamic performances and guaranteeing that the closed-loop system is transiently stable. Simulation results show better transient behavior of the proposed nonlinear controller as compared with the conventional backstepping strategy and an immersion and invariance (I&I) strategy. In addition, they can accomplish transient stability enhancement together with frequency and voltage regulation despite large disturbances.