Hybrid MMC with Low Voltage Operations and DC Fault Ride-through Capabilities Based on Auxiliary Full-bridge Converter

Xibei Zhao; Jiangping Ding; Jianzhong Xu; Jinsha Yuan

doi:10.17775/CSEEJPES.2019.02470

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Hybrid MMC with Low Voltage Operations and DC Fault Ride-through Capabilities Based on Auxiliary Full-bridge Converter

Regular Papers | 更新时间：2026-10-15

- Hybrid MMC with Low Voltage Operations and DC Fault Ride-through Capabilities Based on Auxiliary Full-bridge Converter
- Hybrid MMC with Low Voltage Operations and DC Fault Ride-through Capabilities Based on Auxiliary Full-bridge Converter
- 中国电机工程学会电力与能源系统学报(英文) 2022年8卷第3期页码：864-871
- 作者机构：
  
  State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University (NCEPU),Beijing,China
- 作者简介：
- 基金信息：
- DOI：10.17775/CSEEJPES.2019.02470
  中图分类号：
- 纸质出版：2022-05-01
- 稿件说明：
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Xibei Zhao, Jiangping Ding, Jianzhong Xu, 等. Hybrid MMC with Low Voltage Operations and DC Fault Ride-through Capabilities Based on Auxiliary Full-bridge Converter[J]. 中国电机工程学会电力与能源系统学报(英文), 2022,8(3):864-871.

Xibei Zhao, Jiangping Ding, Jianzhong Xu, et al. Hybrid MMC with Low Voltage Operations and DC Fault Ride-through Capabilities Based on Auxiliary Full-bridge Converter[J]. CSEE Journal of Power and Energy Systems, 2022, 8(3): 864-871.
Xibei Zhao, Jiangping Ding, Jianzhong Xu, 等. Hybrid MMC with Low Voltage Operations and DC Fault Ride-through Capabilities Based on Auxiliary Full-bridge Converter[J]. 中国电机工程学会电力与能源系统学报(英文), 2022,8(3):864-871. DOI： 10.17775/CSEEJPES.2019.02470.

Xibei Zhao, Jiangping Ding, Jianzhong Xu, et al. Hybrid MMC with Low Voltage Operations and DC Fault Ride-through Capabilities Based on Auxiliary Full-bridge Converter[J]. CSEE Journal of Power and Energy Systems, 2022, 8(3): 864-871. DOI： 10.17775/CSEEJPES.2019.02470.

摘要

Abstract

The hybrid modular multilevel converter (MMC) based on half-bridge sub-modules (HBSMs) and full-bridge sub-modules (FBSMs) can operate at low DC voltages and clear DC side fault currents. However

the costs and power losses are much higher in hybrid converters. An auxiliary full-bridge converter (AFC) is designed to reconstruct the converter structure in the arm level

and the HBSMs output capacitor voltage through the AFC can attain similar capabilities to hybrid MMCs. The operational principle of the auxiliary full-bridge converter is discussed

and the low voltage operation and non-blocking fault ride through control are verified in a two-terminal DC network simulation. Through economic analysis

the power loss of the AFC is similar to a HBSM MMC but the total investment is lower than a hybrid MMC

making the AFC a promising solution to improve the existing HBSM converter with more controllability.

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