Operation of three-phase modular multilevel converter (MMC) with reduced number of arms

Ahmed Elserougi, Shehab Ahmed, Ahmed Massoud

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

4 Scopus citations

Abstract

Conventional three-phase MMC consists of six-arms, each arm is controlled to generate unipolar voltage ranging from zero to Vdc where Vdc is the input DC voltage. Each arm voltage has two components (DC and AC components). In this work, the operation of MMC with reduced number of arms (four arms only), correspondingly reduced cost is presented. This mode can be also used with the conventional three-phase MMC in case of faulty leg. In the presented approach, only two legs (i.e. four arms) are considered, where two out of the three phases are connected to these legs, while the third phase is tapped from the mid-point of the DC supply. To assure generating three-phase output voltages, the AC components in the presented approach will depend on the line-voltages. As the voltage per arm is limited to Vdc, the peak of line-voltage in the suggested mode is limited to 0.5 Vdc, i.e. the generated phase voltages will have a peak of 0.5Vdc/√3 (i.e. 57.7% compared to conventional three-phase MMC with same input voltage). A detailed illustration of the operational concept of the proposed architecture is presented in this work. The simulation results of the suggested approach is presented to validate the proposed concept.
Original languageEnglish (US)
Title of host publicationProceedings of the IEEE International Conference on Industrial Technology
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages355-359
Number of pages5
ISBN (Electronic)9781467380751
ISBN (Print)9781467380751
DOIs
StatePublished - May 19 2016
Externally publishedYes
EventIEEE International Conference on Industrial Technology, ICIT 2016 - Taipei, Taiwan, Province of China
Duration: Mar 14 2016Mar 17 2016

Publication series

NameProceedings of the IEEE International Conference on Industrial Technology
Volume2016-May

Conference

ConferenceIEEE International Conference on Industrial Technology, ICIT 2016
CountryTaiwan, Province of China
CityTaipei
Period03/14/1603/17/16

Keywords

  • Modular Multilevel Converter
  • Reduced number of arms

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering

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