Transient Characteristics and Accommodative Current Limiting Strategy for Bidirectional Interlinking Converters in Hybrid AC/DC Microgrids

Xia Shen; Zhikang Shuai; Wen Huang; Chao Shen; Yang Shen; Z. John Shen

doi:10.17775/CSEEJPES.2021.04470

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Transient Characteristics and Accommodative Current Limiting Strategy for Bidirectional Interlinking Converters in Hybrid AC/DC Microgrids

Regular Papers | 更新时间：2026-10-15

- Transient Characteristics and Accommodative Current Limiting Strategy for Bidirectional Interlinking Converters in Hybrid AC/DC Microgrids
- Transient Characteristics and Accommodative Current Limiting Strategy for Bidirectional Interlinking Converters in Hybrid AC/DC Microgrids
- 中国电机工程学会电力与能源系统学报(英文) 2024年10卷第4期页码：1575-1588
- 作者机构：
  
  1. College of Electrical and Information Engineering, Hunan University,Changsha,China
  2. Department of Electrical and Computer Engineering, Illinois Institute of Technology,IL,Chicago,USA
- 作者简介：
- 基金信息：
- DOI：10.17775/CSEEJPES.2021.04470
  中图分类号：
- 纸质出版：2024-07-01
- 稿件说明：
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Xia Shen, Zhikang Shuai, Wen Huang, 等. Transient Characteristics and Accommodative Current Limiting Strategy for Bidirectional Interlinking Converters in Hybrid AC/DC Microgrids[J]. 中国电机工程学会电力与能源系统学报(英文), 2024,10(4):1575-1588.

Xia Shen, Zhikang Shuai, Wen Huang, et al. Transient Characteristics and Accommodative Current Limiting Strategy for Bidirectional Interlinking Converters in Hybrid AC/DC Microgrids[J]. CSEE Journal of Power and Energy Systems, 2024, 10(4): 1575-1588.
Xia Shen, Zhikang Shuai, Wen Huang, 等. Transient Characteristics and Accommodative Current Limiting Strategy for Bidirectional Interlinking Converters in Hybrid AC/DC Microgrids[J]. 中国电机工程学会电力与能源系统学报(英文), 2024,10(4):1575-1588. DOI： 10.17775/CSEEJPES.2021.04470.

Xia Shen, Zhikang Shuai, Wen Huang, et al. Transient Characteristics and Accommodative Current Limiting Strategy for Bidirectional Interlinking Converters in Hybrid AC/DC Microgrids[J]. CSEE Journal of Power and Energy Systems, 2024, 10(4): 1575-1588. DOI： 10.17775/CSEEJPES.2021.04470.

摘要

Abstract

Bidirectional interlinking converter (BIC) is the core equipment in a hybrid AC/DC microgrid connected between AC and DC sub-grids. However

the variety of control modes and flexible bidirectional power flow complicate the influence of AC faults on BIC itself and on DC sub-grid

which potentially threaten both converter safety and system reliability. This study first investigates AC fault influence on the BIC and DC bus voltage under different BIC control modes and different pre-fault operation states

by developing a mathematical model and equivalent sequence network. Second

based on the analysis results

a general accommodative current limiting strategy is proposed for BIC without limitations to specific mode or operation condition. Current amplitude is predicted and constrained according to the critical requirements to protect the BIC and relieving the AC fault influence on the DC bus voltage. Compared with conventional methods

potential current limit failure and distortions under asymmetric faults can also be avoided. Finally

experiments verify feasibility of the proposed method.

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