A Novel Fault-Tolerant Control of Modular Multilevel Converter under Sub-Module Faults Based on Phase Disposition PWM

Jingyuan Yin, Wen Wu, Tongzhen Wei, Xuezhi Wu and Qunhai Huo
Additional contact information
Jingyuan Yin: Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100044, China
Wen Wu: National Active Distribution Network Technology Research Center, Beijing Jiaotong University, Beijing 100044, China
Tongzhen Wei: Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100044, China
Xuezhi Wu: National Active Distribution Network Technology Research Center, Beijing Jiaotong University, Beijing 100044, China
Qunhai Huo: Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100044, China

Energies, 2018, vol. 12, issue 1, 1-17

Abstract: Each arm of modular multilevel converter (MMC) consists of a large number of sub-module (SM) units. However, it also increases the probability of SM failure during the long-term system operation. Focusing on the fault-tolerant operation issue for the MMC under SM faults, the traditional zero-sequence voltage injection fault-tolerant control algorithm is analyzed detailed and its disadvantages are concluded. Based on this, a novel fault-tolerant control strategy based on phase disposition pulse-width modulation (PD-PWM) is proposed in this paper, which has three main benefits: (i) it has carrier and modulation wave dual correction mechanism, which control ability is more higher and flexible; (ii) it only needs to inject zero-sequence voltage in half a cycle of the modulation wave, which simplifies the complexity of traditional zero-sequence voltage injection control algorithms and much easier for implement; (iii) furthermore, the zero-sequence voltage can even be avoided injecting under the symmetrical fault conditions. Finally, the effectiveness of the proposed control strategy is verified with the simulation and experiment studies under different fault conditions.

Keywords: modular multilevel converter (MMC); Sub-module (SM) fault; fault-tolerant control; Phase Disposition PWM (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: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/12/1/20/pdf (application/pdf)
https://www.mdpi.com/1996-1073/12/1/20/ (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:2018:i:1:p:20-:d:192464

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 ().