Conventional model predictive control (MPC) suffers from unfixed switching frequency, heavy computational burden, and cumbersome weighting factors’ tuning, especially for multilevel inverter applications due to a large number of voltage vectors. To address these concerns, this article proposes multiple-voltage-vector (MVV) MPC algorithms with reduced complexity and fixed switching frequency for T-type three-phase three-level inverters. First, MMVs are adopted during each control period, and their execution times are set according to the predefined cost functions. Second, weighting factors for balancing the neutral point (NP) voltage in the cost function are eliminated by utilizing redundant voltage vectors, which simplifies the control implementation. Third, through mapping the reference voltage in the first large sector, the calculation complexity for the execution times of voltage vectors in different large sectors becomes much lower. Finally, main experimental results were presented to validate the effectiveness of the proposed algorithms.

中文翻译：

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多电平逆变器复杂度降低的多电压矢量模型预测控制

传统的模型预测控制 (MPC) 存在开关频率不固定、计算负担过重和权重因子调整繁琐的问题，尤其是对于多电平逆变器应用而言，由于存在大量电压矢量。为了解决这些问题，本文提出了多电压矢量 (MVV) MPC 算法，该算法具有降低的复杂性和固定开关频率的 T 型三相三电平逆变器。首先，在每个控制周期采用 MMV，并根据预定义的成本函数设置其执行时间。其次，通过利用冗余电压向量消除了成本函数中用于平衡中性点 (NP) 电压的加权因子，从而简化了控制实现。第三，通过映射第一大扇区的参考电压，不同大扇区的电压向量执行时间的计算复杂度变得更低。最后，给出了主要的实验结果来验证所提出算法的有效性。