Home Journals Articles Updates About
CN
image
收藏切换
Open-circuit Fault Diagnosis and Fault-tolerant Control of T-type Three-level Grid-connected Converter
收藏切换
Nan JIN, Yingxun XIA, Leilei GUO, Yanyan LI, Wuchuang FAN
Journal of Power Supply | 2026, 24(3) : 335 - 343
Less
收藏切换
Journal of Power Supply | 2026, 24(3): 335-343
• Fault Diagnosis and Reliability •
Open-circuit Fault Diagnosis and Fault-tolerant Control of T-type Three-level Grid-connected Converter
Full
Nan JIN, Yingxun XIA, Leilei GUO, Yanyan LI, Wuchuang FAN
Affiliations
  • College of Electrical and Information Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China
Published: 2026-03-30 doi: 10.13234/j.issn.2095-2805.2026.3.335
Outline
收藏切换

To improve the reliability of a grid-connected converter under operation, an open-circuit fault diagnosis and fault-tolerant control strategy is proposed for a T-type three-level grid-connected converter. After an open-circuit fault occurs in a power device, through the analysis of the operating state of the converter, the changing relationship between the converter output current and the currents flowing from the midpoint of the DC-side capacitor to each phase is elucidated. The average value of the converter output current and that of the currents flowing from the midpoint of the DC-side capacitor to each phase are calculated, and these values are compared with the preset diagnostic thresholds to locate the faulty power device. According to their locations, the faults are categorized into Class-I (vertical bridge arm fault) and Class-II (horizontal bridge arm fault). The corresponding fault-tolerant structures are designed for the two types of faults, and a fault diagnosis and model predictive fault-tolerant control strategy is proposed for the T-type three-level grid-connected converter. Experimental results verify that the proposed method can quickly locate the position of the faulty power device of the converter, realize fault-tolerant continuous operation and improve the reliability of the converter.

T-type three-level converter  /  fault diagnosis  /  fault-tolerant control  /  open-circuit fault  /  model predictive control
金楠, 夏英巽, 郭磊磊, 李琰琰, 樊武闯. T型三电平并网变换器开路故障检测及容错控制. 电源学报, 2026 , 24 (3) : 335 -343 . DOI: 10.13234/j.issn.2095-2805.2026.3.335
Nan JIN, Yingxun XIA, Leilei GUO, Yanyan LI, Wuchuang FAN. Open-circuit Fault Diagnosis and Fault-tolerant Control of T-type Three-level Grid-connected Converter[J]. Journal of Power Supply, 2026 , 24 (3) : 335 -343 . DOI: 10.13234/j.issn.2095-2805.2026.3.335
Funding
Less
  • National Natural Science Foundation of China(U2004166)
  • Science and Technology Project of Henan Province(212102210021; 232102241026)
  • Program for Innovative Research Team (in Science and Technology) in University of Henan Province(22IRTSTHN017)
Appendix
Less
Year 2026 volume 24 Issue 3
33
3
Cite this Article
BibTeX
Article Info
doi: 10.13234/j.issn.2095-2805.2026.3.335
  • Receive Date：2023-09-18
  • Online Date：2026-10-29
  • Published：2026-03-30
Article Data
Affiliations
History
  • Received：2023-09-18
  • Revised：2023-11-20
  • Accepted：2023-11-30
Funding
National Natural Science Foundation of China(U2004166)
Science and Technology Project of Henan Province(212102210021; 232102241026)
Program for Innovative Research Team (in Science and Technology) in University of Henan Province(22IRTSTHN017)
Affiliations
    College of Electrical and Information Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China
References
Share
https://castjournals.cast.org.cn/joweb/dyxb/EN/10.13234/j.issn.2095-2805.2026.3.335
Share to
QR

Scan QR to access full text

Cite this article
BibTeX
Citations
表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
关闭全屏
  • BibTeX
  • EndNote
  • RefWorks
  • TxT
Links
Articles
Latest Articles
Most Read
Collections
Updates
Events
News
Multimedia
About
About Us
Contact
No. 86 Xueyuan South Road, Haidian District, Beijing
100081
010-62662699(Operation and Technical Support)
qkjq@cast.org.cn

Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House