三电平ANPC逆变器优化开关序列模型预测控制

Model Predictive Control for Three-level ANPC Inverter Based on Optimize Switching Sequence

针对三电平有源中点箝位型(ANPC)逆变器提出一种优化开关序列的模型预测控制(MPC)策略,根据逆变器拓扑结构建立了数学模型,选择最优的开关序列对逆变器进行控制。所提方法改善了传统MPC开关频率不固定和采样频率较高的缺点,构建了包含电流偏差和中点电压偏移量的价值函数,选择使价值函数最小的开关序列和时间序列作为输出。仿真和实验结果表明,所提优化开关序列的控制策略具有有效性与可行性。

A model predictive control(MPC)strategy of three-level active neutral-point clamp(ANPC)inverter based on optimal switching sequence is proposed.A mathematical model is established according to the inverter topology,and the optimal switching sequence is selected to control the inverter.The proposed method improves the shortcomings of the traditional MPC with variable switching frequency and high sampling frequency,constructs a value function including current deviation and neutral-point voltage offset,and selects the switching sequence and time sequence that minimize the value function as the output.Simulation and experimental results show that the proposed control strategy is effective and feasible.