Fault-Tolerant Control Strategies and Capability without Redundant Sub-Modules in Modular Multilevel Converters

Jinke Li and Jingyuan Yin
Additional contact information
Jinke Li: China Energy Engineering Group Jiangsu Power Design Institute Co., LTD, Nanjing 211102, China
Jingyuan Yin: Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100044, China

Energies, 2019, vol. 12, issue 9, 1-21

Abstract: Sub-module (SM) faults in modular multilevel converters (MMCs) without redundancies result in unbalanced converter output voltages and improper control of modulation due to an unequal number of SMs inserted between the different phase-legs. The derived mathematics model of the MMC demonstrates the impact of the SM fault in the circulating currents and capacitor voltages. For achieving the SM fault-tolerance, detailed analysis of the MMC’s electrical quantities under SM fault-tolerant algorithms is provided together with two modulation reconfiguration techniques for maintaining voltage balance. Fault-tolerant abilities of the two modulation algorithms are also discussed and defined. Simulation results from a 21-level converter and experimental work in a three-phase five-level converter demonstrate the feasibility and performance of the proposed fault-tolerant control strategies.

Keywords: module multilevel converters (MMC); sub-module (SM) failure; fault-tolerant strategy; modulation reconfiguration (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
https://www.mdpi.com/1996-1073/12/9/1726/pdf (application/pdf)
https://www.mdpi.com/1996-1073/12/9/1726/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:12:y:2019:i:9:p:1726-:d:228986

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().