单元机组协调系统的非线性内模控制

协调系统的性能直接影响单元机组运行的安全性和经济性。为了克服非线性环节以及能量供需之间关联耦合作用对协调系统控制品质的影响，本文将反馈线性化方法与多变量内模控制结构结合，针对一个通用的非线性协调系统模型，设计出非线性内模协调控制器。文中分析了多变量非线性内模控制结构的鲁棒稳定性及动态性能。在不同负荷下的仿真试验表明，所设计的控制系统具有良好的解耦效果和抗干扰能力。

NONLINEAR INTERNAL MODEL CONTROL FOR THE BOILER-TURBINE COORDINATE SYSTEMS OF POWER UNIT

The performance of the boiler-turbine control system has great impact on the safety and economy of a power unit. To trail off the effects of nonlinear behavior and coupling of energy feed-demand, a nonlinear feedback theory and a multi- variable internal model control structure are used to design a nonlinear internal model controller for a class of nonlinear boiler- turbine system. The robust stability of the closed-loop system is proved, and its performance is analyzed. Simulation results show that the nonlinear internal model control structure brings into a good play in a wide range of load units and has a better decouple and disturbance rejection properties.