An Improved Model Predictive Voltage Control With Reduced Computational Burden for T-Type Three-Phase Three-Level Inverters
An Improved Model Predictive Voltage Control With Reduced Computational Burden for T-Type Three-Phase Three-Level Inverters
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DOI：
10.1109/tpel.2023.3333357
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发表时间：
2024-02
影响因子：
6.7
通讯作者：
Youcheng Wang;Yong Yang;Shengwei Chen;Rong Chen;Jiefeng Hu;Weimin Wu;Yiwang Wang;Hui Yang;Liwei Zhou;José Rodríguez
中科院分区：
文献类型：
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作者：
Youcheng Wang;Yong Yang;Shengwei Chen;Rong Chen;Jiefeng Hu;Weimin Wu;Yiwang Wang;Hui Yang;Liwei Zhou;José Rodríguez
采用LC滤波的三相三电平逆变器传统的有限集模型预测电压控制存在运算量大、加权因子调整繁琐、开关频率可变等问题。针对这些问题，本文提出了一种具有最优开关顺序的改进模型预测电压控制方案。设计了两种电压矢量开关方式，消除了加权因素，实现了中点电压平衡。在此基础上，提出了一种基于边界条件的分区优化方法，避免了多组占空比的计算，大大降低了计算负担。此外，所提出的方法工作在恒定的开关频率。基于实验室样机的实验结果从稳态和动态性能、算法执行时间和参数敏感度等多个角度验证了该算法的有效性。
The traditional finite-set model predictive voltage control for three-phase three-level voltage source inverters with LC-filter suffers from high computational burden, fussy weighting factor adjustment, and variable switching frequency. To address these issues, this article proposes an improved model predictive voltage control scheme with optimal switching sequence. Two voltage vector switching modes are designed to eliminate weighting factors and achieve neutral-point voltage balancing. Furthermore, a subsector optimization method based on boundary conditions is proposed, which avoids the calculation of multiple groups of duty cycle and hence, greatly reducing the computational burden. Additionally, the proposed method operates at a constant switching frequency. The effectiveness of the proposed algorithm is verified by experimental results based on a laboratory prototype from various perspectives, including steady-state and dynamic performance, algorithm execution time, and parameter sensitivity.