Optimized Control for MMCs with Reduced Power Loss and Extended Lifetime

IF 1.9 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

International Transactions on Electrical Energy Systems Pub Date : 2024-01-25 DOI:10.1155/2024/5583497

Jifeng Zhao, Jia Pei, Yun Sun, Rujin Wang, Jun Hang, Shichuan Ding

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引用次数: 0

Abstract

Modular multilevel converters (MMCs) are widely applied to medium and high voltage occasions. The total power consumption of the submodule (SM) and the maximum power consumption of power devices in the SM are related to the operating costs and lifetime of the MMC. Existing literature only considers total power loss optimization or maximal power consumption optimization in MMC’s SM. In this article, a reduced loss and extended lifetime power loss optimum control (RLEL-PLOC) is introduced to inject the first-best second harmonic circulation into the MMC’s arm current. Compared with the conventional power loss optimization control, the proposed control could decrease the maximal power consumption of the semiconductor devices without increasing the total loss of the SM. According to study results of the MMC, compared with the circulating current suppression control (CCSC) method, the total power consumption of the SM could be reduced by 4.2% and the maximal power dissipation in the SM could be reduced by 5.4% with RLEL-PLOC. PSCAD simulation and MMC prototype experiment are also carried out, and the research results verified the availability of the put forward RLEL-PLOC for MMCs.

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优化 MMC 控制，降低功率损耗，延长使用寿命

模块化多电平转换器（MMC）广泛应用于中高压场合。子模块（SM）的总功耗和子模块中功率器件的最大功耗关系到 MMC 的运行成本和使用寿命。现有文献仅考虑了 MMC 子模块的总功率损耗优化或最大功耗优化。本文介绍了一种降低损耗和延长寿命的功率损耗优化控制（RLEL-PLOC），它能将最佳二次谐波循环注入 MMC 的臂电流。与传统的功率损耗优化控制相比，所提出的控制可在不增加 SM 总损耗的情况下降低半导体器件的最大功耗。根据 MMC 的研究结果，与环流抑制控制（CCSC）方法相比，RLEL-PLOC 可使 SM 的总功耗降低 4.2%，SM 的最大功率耗散降低 5.4%。此外，还进行了 PSCAD 仿真和 MMC 原型实验，研究结果验证了所提出的 RLEL-PLOC 可用于 MMC。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Transactions on Electrical Energy Systems ENGINEERING, ELECTRICAL & ELECTRONIC-

CiteScore

6.70

自引率

8.70%

发文量

342

期刊介绍： International Transactions on Electrical Energy Systems publishes original research results on key advances in the generation, transmission, and distribution of electrical energy systems. Of particular interest are submissions concerning the modeling, analysis, optimization and control of advanced electric power systems. Manuscripts on topics of economics, finance, policies, insulation materials, low-voltage power electronics, plasmas, and magnetics will generally not be considered for review.