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提出了一种新的超超临界机组PID协调控制器的设计方法,该方法以耗散理论为核心思想.首先建立超超临界机组非线性模型,将机组的工作点平移,简化机组模型,将积分项引入简化后的模型中,根据控制输入量和输出量的不同将模型分解为2个子系统,然后根据各个子系统具体情况采用不同的设计方法,最终构造出PID协调控制器,并将其应用到1 000MW超超临界机组中进行仿真验证.结果表明:该控制器具有良好的给定值跟随性和抗干扰性.
A new design method of PID controller for ultra-supercritical units is proposed, which takes the dissipative theory as the core idea.Firstly, the nonlinear model of ultra-supercritical units is established, the operating points of the units are translated and the unit model is simplified, The integral term is introduced into the simplified model. The model is decomposed into two subsystems according to the difference between the control input and the output, and then different design methods are used according to the specific conditions of each subsystem. Finally, a PID coordination controller is constructed, Which is applied to simulate the 1 000 MW ultra-supercritical unit.The results show that the controller has good set-point following and anti-interference performance.