基于LQR汽轮机最优控制系统研究

Research of the Optimal Control System for Steam Turbine Based on LQR

以中间再热式汽轮机调节系统为研究对象,建立了汽轮机调节系统的状态空间模型。根据状态反馈线性二次型调节器LQR(Linear Quadratic Regulator)理论设计了汽轮机功频最优控制系统,并介绍了加权矩阵Q和R的选择方法。在MATLAB环境下完成了汽轮机功频控制系统的仿真。结果表明,基于LQR汽轮机最优控制系统具有良好的抗干扰能力,能进一步提高系统动态响应和稳态精度。

With control system of a reheat steam turbine taken as a research object, a model of state-space equation is proposed for the steam turbine control system. On the basis of Linear Quadratic Regulator, a proper optimal controller is designed. Some choice ways of the weighted matrix Q and R are introduced. The simulation for this control system is completed in MATLAB. The simulation result shows that the LQR control system of steam turbine has better ability of restrain disturbance, which improves the dynamic response and the accuracy of the steady-state.