Analysis of multi-carrier PWM methods for back-to-back HVDC systems based on modular multilevel converters

Georgios S. Konstantinou, Mihai Ciobotaru, Vassilios G. Agelidis

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

61 Citations (Scopus)

Abstract

This paper analyzes two multi-carrier pulse-width modulation (PWM) techniques (N+1 and 2N+1) of the Modular Multilevel Converter (MMC) used in a back-to-back configuration under conventional dq-frame control. The PWM method applied to the MMC has an effect not only on the output waveforms and number of levels derived out of a given configuration of the MMC but also on the DC-link voltage and arm currents of the converter. As the number of sub-modules in the phase-leg increases, the 2N+1 modulation becomes more attractive as it provides improved waveforms without significantly affecting the operation of the converter. The simulation results show the application and good performance of both methods and the advantages of utilizing the 2N+1 modulation as the number of sub-modules increases.
Original languageEnglish
Title of host publicationProceedings IECON 2011
Subtitle of host publication37th Annual Conference of the IEEE Industrial Electronics Society
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages4391-4396
Number of pages6
ISBN (Electronic)9781612849720
DOIs
Publication statusPublished - 2011
Externally publishedYes
Event37th Annual Conference of the IEEE Industrial Electronics Society, IECON 2011 - Melbourne, VIC, Australia
Duration: 7 Nov 201110 Nov 2011

Other

Other37th Annual Conference of the IEEE Industrial Electronics Society, IECON 2011
CountryAustralia
CityMelbourne, VIC
Period7/11/1110/11/11

Keywords

  • high-voltage direct current (HVDC)
  • Modular multilevel converter (MMC)
  • Pulse width modulation (PWM)
  • voltage balancing

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