Structural reliability analysis of modular multi-level converters

Xiuli Wang, Jingli Guo, Hui Pang, Biyang Wang, Tingting Cai

Research output: Contribution to journalArticlepeer-review

Abstract

The modular multi-level converter (MMC) is one of the significant facilities in the voltage source converter based high voltage direct current (VSC-HVDC) transmission system, and its reliability plays a key role in the reliable and continuous operation of the HVDC system. A detailed reliability model of the MMC was proposed with the consideration of sub-modules, the control/protection system and the cooling system. Reliability functions of MMCs with two redundancy strategies were presented by the k-out-of-n: G model and the Gamma distribution respectively. Based on the proposed reliability models, a quantitative assessment of the relative merits of MMCs with different redundant components, different redundancy rates and different redundancy strategies was undertaken, which could provide essential data for the decision-making in topology design and redundancy arrangement.

Original languageEnglish
Pages (from-to)1908-1914
Number of pages7
JournalZhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering
Volume36
Issue number7
DOIs
Publication statusPublished - 5 Apr 2016

Keywords

  • K-out-of-n: G model
  • Modular multi-level converter(MMC)
  • Redundancy strategy
  • Reliability assessment
  • VSC-HVDC

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