Thyristor based modular multilevel converter with active full-bridge chain-link for forced commutation

Peng Li, Stephen Finney, Derrick Holliday

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

9 Citations (Scopus)
39 Downloads (Pure)

Abstract

Voltage source converter (VSC) such as modular multilevel converter (MMC) has been intensively studied for high voltage direct current (HVDC) applications due to its flexible terminal voltage adjustment, compatibility with weak ac grid and independent active/reactive power control over conventional linecommutated-converter (LCC). However, LCC using thyristors still offers advantages such as high current capability and low semiconductor losses, making it dominant in the construction of large scale converter station. This paper investigates the potential of using thyristor to build the MMC sub-module circuitry, where an auxiliary full-bridge chain-link (FB-CL) is adopted for the controlled transition and forced commutation of main thyristorbridge, forming the proposed active forced commutated (AFC) thyristor cell. The AFC-MMC combines the advantages of LCC and MMC by the hybrid use of thyristor and self-commutated device, including the high power capacity, optimized efficiency, flexible control and enhanced fault-tolerant ability.
Original languageEnglish
Title of host publicationControl and Modeling for Power Electronics (COMPEL), 2016 IEEE 17th Workshop on
Place of PublicationPiscataway, NJ
PublisherIEEE
Number of pages6
ISBN (Print)9781509018161
DOIs
Publication statusPublished - 1 Sep 2016
EventThe Seventeenth IEEE Workshop on Control and Modeling for Power Electronics - Trondheim, Norway, Trondheim, Norway
Duration: 27 Jun 201630 Jun 2016
http://sites.ieee.org/compel2016/

Conference

ConferenceThe Seventeenth IEEE Workshop on Control and Modeling for Power Electronics
Abbreviated titleCOMPEL 2016
CountryNorway
CityTrondheim
Period27/06/1630/06/16
Internet address

Keywords

  • multilevel converter
  • forced commutation
  • thyristors
  • insulated gate bipolar transistors
  • switches
  • reactive power
  • power conversion
  • capacitors
  • commutation
  • HVDC power convertors
  • dc fault reverse-blocking ability
  • full-bridge IGBT chain-link
  • high power capacity
  • low semiconductor losses

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    Li, P., Finney, S., & Holliday, D. (2016). Thyristor based modular multilevel converter with active full-bridge chain-link for forced commutation. In Control and Modeling for Power Electronics (COMPEL), 2016 IEEE 17th Workshop on IEEE. https://doi.org/10.1109/COMPEL.2016.7556658