改进的不对称三电平快速模型预测控制算法

An improved asymmetric three-level F-MPC algorithm

针对多电平并网逆变器拓扑结构复杂、算法运算量大的问题,提出了一种新的非对称三相三电平拓扑结构及其改进的快速模型预测控制(fast model predictive contol,F-MPC)算法,与传统三电平逆变器拓扑结构相比具有更少的箝位器件,提高了系统的可靠性,降低了所需空间及成本;所提算法由于不用计算全部矢量的代价函数,大大缩短了计算时间,提高系统的响应速度。在MATLAB仿真模型和小型实验平台得到的结果验证了所提拓扑结构和算法的合理性及有效性。

A new asymmetric three-phase three-level topology and its improved fast model predictive control(F-MPC) algorithm are proposed to address the problems of complex topology and large algorithm computation of multilevel grid-connected inverters.Compared with the traditional three-level inverter topology,the proposed algorithm has fewer clamping devices,which improves the reliability of the system and reduces the required space and cost;the proposed algorithm greatly reduces the computation time and improves the response speed of the system because it does not need to calculate the cost function of all vectors.The result obtained in the MATLAB simulation model and the small-scale experimental platform verifies the rationality and effectiveness of the proposed topology and algorithm.