发电机组非线性预测综合控制设计

Nonlinear Predictive Integrated Control Design for Turbine Generator Unit

定义状态变量和它们的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,运用预测控制理论知识进行非线性预测控制设计,找到了一种新的非线性控制设计方法。针对单机无穷大系统,对发电机进行非线性预测综合控制设计,得到了新的发电机组非线性综合控制规律。反馈系统包含了跟踪误差的未来信息,以便改善发电机的跟踪速度和控制效果。仿真结果表明,该方法能很好地协调发电机的动、静态性能,解决了由于电压调节或有功功率调节而引起的有功功率或发电机机端电压对给定值的偏移,改善了发电机的动态响应特性。

This paper proposes the target state equations （TSEs） which consist of the deviations between the state variables and their track references. Based on TSEs, applying the predictive control theory, a novel nonlinear control method is given. On the single machine to infinite bus power system model, using the design method, the novel nonlinear predictive integrated control laws of the generator are acquired. To improve the tracking speed and control effects of the generator, the feedback system includes indirectly the future information of the tracking errors. Simulation results show that the control method can perfectly coordinate the dynamic and the static performances of the generator. The static deviation questions resulting from the voltage regulation or the active power regulation are solved satisfactorily, and the dynamic characteristic of the generator is improved greatly.