改进型有限集模型预测控制在三相电压型PWM整流器中的应用

An improved Finite Control Set Model Predictive Control of a PWM Rectifier

本文介绍了一种改进型的有限控制集模型预测控制(Finite Control Set Model Predictive Control,FCS-MPC)在三相电压型PWM整流器中的应用(Two level-Three phase voltage source PWM Rectifier,2L-VSR)。传统的FCS-MPC应用到VSR中需要分别预测8个不同矢量对应的输出,然后将这8个预测值分别代入目标函数中找出使得目标函数最小的电压矢量,运算量偏大,而且每个开关周期内开关次数大,从而造成开关损耗大。本文结合无差拍控制、开关状态反馈的思想提出一种改进型FCS-MPC。仿真结果表明,这种改进型的FCS-MPC相比于传统的FCS-MPC在不牺牲稳态和动态性能的情况下大大降低开关次数。

In this paper, an improved Finite Control Set Model Predictive Control（FCS-MPC） applied to two level three phase voltage source PWM rectifier（2 L-VSR） is introduced. In traditional FCS-MPC application in VSR, 8 different vectors need to be predicted and substituted into the objective function respectively to find out the voltage vector that minimizes the objective function, which results in large amount of computation, and much switching times,leading to great switching loss. Thus, an improved FCS-MPC combining no beat control with switch state feedback is proposed in this paper. Simulation results show that the proposed FCS-MPC greatly reduces switching times without sacrificing steady-state and dynamic performance compared with the conventional FCS-MPC.