一种用于 T 型三电平逆变器的新型最优开关序列模型预测电压控制

吕晋宇; 窦银科

doi:10.19783/j.cnki.pspc.251240

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一种用于 T 型三电平逆变器的新型最优开关序列模型预测电压控制

应用研究 | 更新时间：2026-07-27

- 一种用于 T 型三电平逆变器的新型最优开关序列模型预测电压控制
- A novel optimal switching sequence model predictive voltage control for T-type three-level inverters
- 电力系统保护与控制 2026年54卷第12期
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- DOI：10.19783/j.cnki.pspc.251240
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- 纸质出版：2026
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吕晋宇, 窦银科. 一种用于 T 型三电平逆变器的新型最优开关序列模型预测电压控制[J]. 电力系统保护与控制, 2026,54(12).

LÜ Jinyu, DOU Yinke. A novel optimal switching sequence model predictive voltage control for T-type three-level inverters[J]. Power System Protection and Control, 2026, 54(12).
吕晋宇, 窦银科. 一种用于 T 型三电平逆变器的新型最优开关序列模型预测电压控制[J]. 电力系统保护与控制, 2026,54(12). DOI： 10.19783/j.cnki.pspc.251240.

LÜ Jinyu, DOU Yinke. A novel optimal switching sequence model predictive voltage control for T-type three-level inverters[J]. Power System Protection and Control, 2026, 54(12). DOI： 10.19783/j.cnki.pspc.251240.

摘要

针对需要输出恒定电压的应用场景，提出了一种新型最优开关序列模型预测电压控制 (OSS-MPVC)。首先揭示了 T 型三电平逆变器产生的 27 个电压矢量可以分为零电压矢量、小电压矢量、中电压矢量和长电压矢量。利用小电压矢量可以实现中点电位平衡。基于此，构建了 48 个开关序列。为了减轻较高的计算负担，采用了一种简化的三步优化过程。步骤 1：利用中电压矢量的唯一性来识别候选扇区。步骤 2：根据上下直流母线电容电压的值，将候选开关序列的数量从 8 个减至 4 个。步骤 3：通过最小化成本函数，从 4 个候选开关序列中找到最优开关序列。最后，通过代码执行时间、稳态性能、动态性能和中点平衡性能方面的实验，评估了新型 OSS-MPVC 的可行性。

Abstract

A novel optimal switching sequence model predictive voltage control (OSS-MPVC) is proposed for applications requiring constant voltage output. First

it is revealed that the 27 voltage vectors generated by a T-type three-level inverter can be divided into zero voltage vectors

small voltage vectors

medium voltage vectors

and long voltage vectors. By utilizing small voltage vectors

neutral-point (NP) voltage balancing can be achieved. Based on this principle

48 switching sequences are constructed. To reduce the computational burden

a simplified three-step optimization process is adopted. In Step 1

the candidate sector is identified by exploiting the uniqueness of the medium voltage vectors. In Step 2

the number of the candidate switching sequences is reduced from 8 to 4 based on the voltages of the upper and lower DC link capacitors. In Step 3

the optimal switching sequence is selected from the 4 candidates by minimizing a cost function. Finally

the feasibility of the novel OSS-MPVC strategy is evaluated through experiments in terms of code execution time

steady-state performance

dynamic performance and NP balancing performance.

关键词

Keywords

references

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