THE DESIGN OF NONLINEAR PREDICTIVE EXCITATION CONTROLLER BASED ON TSE

A novel scheme for the control design of nonlinear system is proposed in this paper. Defining the offsets between the state variables and their reference tracks as Target State Equations (TSEs) and using predictive control theory, a nonlinear predictive excitation control law is got for the single machine to infinite bus system. The closed-loop control system takes only the terminal voltage, active power and rotor angular speed of the generator as its feedback variables, so the proposed control can be easily realized. Simultaneously, the feedback system includes indirectly the future information of the tracking errors to improve the tracking speed and control effects. The results of simulation show that the scheme can solve more effectively the problem of the terminal voltage deviating, and can calm more effectively the mechanical oscillation of the generator than the nonlinear control method can do based on differential geometric method who takes the rotor angle or terminal voltage of the generator as the output function.