A Currentless Sorting and Selection based Capacitor-Voltage-Balancing Method for Modular Multilevel Converters

Pengfei Hu, Remus Teodorescu, Songda Wang, Shuqi Li, Josep M. Guerrero

Research output: Contribution to journalJournal articleResearchpeer-review

49 Citations (Scopus)
332 Downloads (Pure)

Abstract

This letter proposes a currentless sorting and selection (SAS)-based capacitor-voltage-balancing method for modular multilevel converters. Without the knowledge of arm-current signals, this method has almost the same performance as the conventional SAS method while reducing the sampling signals, compacting the control system, and saving the overall cost. In this letter, the derivative of the total capacitor voltage of an arm, instead of the arm current, is employed to determine which submodules should be inserted or bypassed. Furthermore, the efficacy of the proposed method is verified by experimental results.
Original languageEnglish
Article number8395396
JournalIEEE Transactions on Power Electronics
Volume34
Issue number2
Pages (from-to)1022 - 1025
Number of pages4
ISSN0885-8993
DOIs
Publication statusPublished - Feb 2019

Keywords

  • Capacitor voltage balancing
  • Currentless sorting and selection
  • Experiments
  • Modular Multilevel Converter

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