Fully Decoupled Branch Energy Balancing Control Method for Modular Multilevel Matrix Converter Based on Sequence Circulating Components

Zexin Zhao; Weijiang Chen; Zhichang Yang; Guoliang Zhao; Bin Han; Yunfei Xu; Nianwen Xiang; Shulai Wang

doi:10.17775/CSEEJPES.2023.01280

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Fully Decoupled Branch Energy Balancing Control Method for Modular Multilevel Matrix Converter Based on Sequence Circulating Components

Regular Papers | 更新时间：2026-10-15

- Fully Decoupled Branch Energy Balancing Control Method for Modular Multilevel Matrix Converter Based on Sequence Circulating Components
- CSEE Journal of Power and Energy Systems Vol. 10, Issue 1, Pages: 235-247(2024)
- 作者机构：
  
  1. China Electric Power Research Institute,Beijing,China
  2. State Grid Corporation of China,Beijing,China
  3. State Grid Smart Grid Research Institute,Beijing,China
  4. State Key Laboratory of Advanced Power Transmission Technology, Global Energy Interconnection Research Institute,Beijing,China
  5. Hefei University of Technology,Hefei,China
- 作者简介：
- 基金信息：
- DOI：10.17775/CSEEJPES.2023.01280
  CLC：
- Published：01 January 2024
- 稿件说明：
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Zexin Zhao, Weijiang Chen, Zhichang Yang, et al. Fully Decoupled Branch Energy Balancing Control Method for Modular Multilevel Matrix Converter Based on Sequence Circulating Components[J]. CSEE Journal of Power and Energy Systems, 2024, 10(1): 235-247.
DOI：

Zexin Zhao, Weijiang Chen, Zhichang Yang, et al. Fully Decoupled Branch Energy Balancing Control Method for Modular Multilevel Matrix Converter Based on Sequence Circulating Components[J]. CSEE Journal of Power and Energy Systems, 2024, 10(1): 235-247. DOI： 10.17775/CSEEJPES.2023.01280.

摘要

Abstract

The modular multilevel matrix converter (M3C) is a potential frequency converter for low-frequency AC transmission. However

capacitor voltage control of high-voltage and large-capacity M3C is more difficult

especially for voltage balancing between branches. To solve this problem

this paper defines sequence circulating components and theoretically analyzes the influence mechanism of different sequence circulating components on branch capacitor voltage. A fully decoupled branch energy balancing control method based on four groups of sequence circulating components is proposed. This method can control capacitor voltages of nine branches in horizontal

vertical and diagonal directions. Considering influences of both circulating current and voltage

a cross decoupled control is designed to improve control precision. Simulation results are taken from a low-frequency transmission system based on PSCAD/EMTDC

and effectiveness and precision of the proposed branch energy balancing control method are verified in the case of nonuniform parameters and an unbalanced power system.

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