DC fault protection for modular multilevel converter HVDC using asymmetrical unipolar full-bridge submodule

Heejin Kim, Jaesik Kang, Sangmin Kim, Chan Ki Kim, Kyeon Hur

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Citations (Scopus)

Abstract

This paper proposes an asymmetrical unipolar full-bridge submodule to protect modular multilevel converter from DC fault. The asymmetrical unipolar full-bridge submodule consists of 3 IGBTs, 4 diodes, and 2 capacitors. Central capacitor generates submodule voltage and works during normal operation. The other capacitor named a supplemental capacitor is located in the short circuit current path and charges during DC fault, effectively generating higher opposite voltage than the conventional full-bridge submodule. It thus reduces the required number of full-bridge submodules in each arm and consequently converter loss. This paper investigates DC fault blocking principles and procedures with the asymmetrical unipolar full-bridge submodule applied hybrid MMC. This paper explores the requirements of the full-bridge submodule of MMC to handle DC fault current and compares the semiconductor losses in the cases of using conventional full-bridge submodule and the asymmetrical unipolar full-bridge submodule. Simulation studies validate the efficacy of the proposed scheme.

Original languageEnglish
Title of host publication9th International Conference on Power Electronics - ECCE Asia
Subtitle of host publication"Green World with Power Electronics", ICPE 2015-ECCE Asia
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1083-1089
Number of pages7
ISBN (Electronic)9788957082546
DOIs
Publication statusPublished - 2015 Jul 27
Event9th International Conference on Power Electronics - ECCE Asia, ICPE 2015-ECCE Asia - Seoul, Korea, Republic of
Duration: 2015 Jun 12015 Jun 5

Publication series

Name9th International Conference on Power Electronics - ECCE Asia: "Green World with Power Electronics", ICPE 2015-ECCE Asia

Other

Other9th International Conference on Power Electronics - ECCE Asia, ICPE 2015-ECCE Asia
CountryKorea, Republic of
CitySeoul
Period15/6/115/6/5

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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    Kim, H., Kang, J., Kim, S., Kim, C. K., & Hur, K. (2015). DC fault protection for modular multilevel converter HVDC using asymmetrical unipolar full-bridge submodule. In 9th International Conference on Power Electronics - ECCE Asia: "Green World with Power Electronics", ICPE 2015-ECCE Asia (pp. 1083-1089). [7167915] (9th International Conference on Power Electronics - ECCE Asia: "Green World with Power Electronics", ICPE 2015-ECCE Asia). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICPE.2015.7167915