变速抽水蓄能机组交流励磁系统模型预测控制

AC Excitation Control System of Variable Speed Pumped Storage Units Based on Model Predictive Control

研究基于模型预测控制的可变速抽水蓄能机组(VSPSU)交流励磁控制系统。针对现有PI控制器性能不佳的问题,研究基于模型预测控制(MPC)的机侧控制系统。建立变速机组的预测模型,根据被控制量的预测误差和输出控制量的加权平方和建立目标函数,并以此为基础设计定子磁场定向的矢量控制系统。通过仿真对所提MPC控制系统的可行性以及控制性能进行定量分析。结果表明,该控制系统具有良好的静、动态性能,能够为变速机组交流励磁设备的开发提供理论依据。

The AC excitation control system of variable speed pumped storage units(VSPSU)based on model predictive control(MPC)was focused on. A rotor- side control system based on MPC was proposed to improve the performance of PI controller. Firstly,the prediction model of VSPSU was presented,and the objective function was defined as the weighted square sum of the prediction error and output control. Then,the vector control system of VSPSU based on stator flux orientation was proposed. For verification,the simulation system of VSPSU with the proposed MPC control system was built in Matlab/Simulink,and the simulation results proves that the proposed controller takes on good static and dynamic performance.