Fault Current Elimination for Modular Multilevel DC/DC Converter Based on Hybrid HBSM and TDM

Haijin Liu; Weijie Wen; Rui Lyu; He Yang; Jiawei He; Botong Li; Bin Li

doi:10.17775/CSEEJPES.2023.07350

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Fault Current Elimination for Modular Multilevel DC/DC Converter Based on Hybrid HBSM and TDM

Regular Papers | 更新时间：2026-03-25

- Fault Current Elimination for Modular Multilevel DC/DC Converter Based on Hybrid HBSM and TDM
- Fault Current Elimination for Modular Multilevel DC/DC Converter Based on Hybrid HBSM and TDM
- 中国电机工程学会电力与能源系统学报(英文) 2026年12卷第1期页码：534-546
- 作者机构：
  
  1. Key Laboratory of Smart Grid of Ministry of Education, Tianjin University,Tianjin,China
  2. State Grid Shanxi Electric Power Company Electric Power Research Institute,Shanxi,Taiyuan,China
  3. Economics & Technology Research Institute, State Grid Tianjin Electric Power Company,Tianjin,China
- 作者简介：
- 基金信息：
- DOI：10.17775/CSEEJPES.2023.07350
  中图分类号：
- 纸质出版：2026
- 稿件说明：
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Haijin Liu, Weijie Wen, Rui Lyu, 等. Fault Current Elimination for Modular Multilevel DC/DC Converter Based on Hybrid HBSM and TDM[J]. 中国电机工程学会电力与能源系统学报(英文), 2026,12(1):534-546.

Haijin Liu, Weijie Wen, Rui Lyu, et al. Fault Current Elimination for Modular Multilevel DC/DC Converter Based on Hybrid HBSM and TDM[J]. CSEE Journal of Power and Energy Systems, 2026, 12(1): 534-546.
Haijin Liu, Weijie Wen, Rui Lyu, 等. Fault Current Elimination for Modular Multilevel DC/DC Converter Based on Hybrid HBSM and TDM[J]. 中国电机工程学会电力与能源系统学报(英文), 2026,12(1):534-546. DOI： 10.17775/CSEEJPES.2023.07350.

Haijin Liu, Weijie Wen, Rui Lyu, et al. Fault Current Elimination for Modular Multilevel DC/DC Converter Based on Hybrid HBSM and TDM[J]. CSEE Journal of Power and Energy Systems, 2026, 12(1): 534-546. DOI： 10.17775/CSEEJPES.2023.07350.

摘要

Abstract

As key equipment in medium voltage DC (MVDC) systems

modular multilevel AC/DC and DC/DC converters (MM-AC/DC

MM-DC/DC) have drawn marvelous attractions. However

research on DC fault ride-through focuses on MM-AC/DC

and the fault current elimination for MM-DC/DC remains a research gap

which limits the wide application of the MVDC system. To fulfil this research gap

the contribution of this paper is revealing the fault current characteristics of MM-DC/DC based on half-bridge and full-bridge submodules (HBSM and FBSM) and proposing a novel MM-DC/DC based on hybrid HBSM and thyristor-diode module (TDM). By integrating TDM in the upper bridge arm of one phase and the down bridge arm of the other phase in MM-DC/DC

the MM-DC/DC achieves self-elimination of fault currents. The basic concept is using the energy at the healthy side to modulate a reverse voltage source (RVS) at the faulty side of MM-DC/DC

forcing fault current through TDM pass across zero. TDM can extinguish the resulting fault current. The parameter design and control strategy of the novel MM-DC/DC are discussed. Simulation is carried out for verification

and the results show that fault current can be eliminated within several milliseconds without causing excessive operating losses and costs.

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