说明：  利用MATLAB/Simulink搭建的三电平逆变器仿真电路，利用模型预测控制方法进行控制，可以实现中点点位平衡，对研究模型预测控制有一定学习作用。
(The simulation circuit of three-level inverter built by MATLAB/Simulink and the control by model predictive control method can realize the balance of mid-point and point, which has a certain learning effect on the study of model predictive control.)