基于目标状态方程的非线性预测励磁控制器的设计

提出了一种新的非线性系统控制设计方法：定义系统的状态变量与其参考轨迹之间的偏差为目标状态方程,并以此状态方程为基础,运用预测控制理论,针对单机无穷大系统进行非线性预测控制设计,得到了一种以机端电压、有功功率和角速度为反馈变量的非线性预测励磁控制规律.该控制规律包含了跟踪误差的未来信息,以便提高跟踪速度和改善控制效果.仿真结果表明：该方法不仅能有效地解决发电机机端电压静态偏移问题,而且能很好地镇定发电机的机械振荡,比以功角偏差为输出函数和以机端电压偏差为输出函数的非线性微分几何控制法更有效、更易于实现.

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.