【摘要】 基于非线性最优预测控制理论,提出了一种汽轮发电机主汽门开度非线性预测控制器的设计方法.通过单机无穷大系统的建模分析,导出具有闭型解析解的控制律,避免了在线优化带来的大量计算负担,从而满足实时控制的要求.控制器的输入信号均选为发电机组的当地测量量,便于工程实现.仿真结果表明,该控制器能有效地提高电力系统的暂态稳定及改善其动态品质.更多还原

【Abstract】 A nonlinear main steam valve controller of turbine generator is presented,on the basis of nonlinear optimal predictive control(NOPC) theory.Firstly,nonlinear optimal predictive control is briefly introduced based on the relative degree and control order of the controlled nonlinear systems.Secondly,the model is obtained for main steam valve,and control law with closed-form analytical solution is derived from the modeling analysis of the single machine infinite bus power system.The derived control law does not require on-line optimization,and huge calculation burden can be avoided.Thus the demand of real-time control can be satisfied.The input signals to the controller are all local measurements,so it is easy to implement in practice.Finally,simulation results are given to show that the controller can greatly enhance the transient stability and the dynamic performance of the power system.更多还原