提出一种基于桶排序的双层模型预测控制方法。对电容 电压进行桶排序，将电压排序后的子模块按次序等分为若干组，通过第一层模型预测控制确定需要插入桥臂的 组数，再通过第二层模型预测控制进一步确定需要插入的子模块。在 PSCAD/EMTDC 下搭建模块化多电平换 流器仿真系统，验证了所提方法的有效性。(A two-level model predictive control method based on bucket sorting is proposed. The capacitor voltage is sorted in buckets. The sub modules are divided into several groups in order. The number of groups that need to be inserted into the bridge arm is determined by the first level model predictive control, and the sub modules that need to be inserted are further determined by the second level model predictive control. In PSCAD / EMTDC, a modular multilevel converter simulation system is built to verify the effectiveness of the proposed method.)