The Nonlinear Controller Design of Generator System with Dynamic Uncertainties

By combining backstepping techniques and small-gain theorem, a nonlinear controller for generator system with dynamic uncertainties is proposed to make rotor angle and voltage stable. For the high-order model of generator system, the excitation control is designed by the modified backstepping techniques and dynamic uncertainties are controlled by the small-gain method, which render the whole closed-loop system asymptotically stable. Since the controller design is based completely on the nonlinear dynamic system without any linearization, the nonlinear property of the system is used to design the nonlinear robust controller. Simulations have shown the effectiveness of the proposed design method.