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

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3 Citations (Scopus)
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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

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Sorting
Capacitors
Signal sampling
Electric potential
Derivatives
Control systems
Costs

Keywords

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

Cite this

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title = "A Currentless Sorting and Selection based Capacitor-Voltage-Balancing Method for Modular Multilevel Converters",
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.",
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author = "Pengfei Hu and Remus Teodorescu and Songda Wang and Shuqi Li and Guerrero, {Josep M.}",
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A Currentless Sorting and Selection based Capacitor-Voltage-Balancing Method for Modular Multilevel Converters. / Hu, Pengfei; Teodorescu, Remus; Wang, Songda; Li, Shuqi; Guerrero, Josep M.

In: IEEE Transactions on Power Electronics, Vol. 34, No. 2, 8395396, 02.2019, p. 1022 - 1025.

Research output: Contribution to journalJournal articleResearchpeer-review

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T1 - A Currentless Sorting and Selection based Capacitor-Voltage-Balancing Method for Modular Multilevel Converters

AU - Hu, Pengfei

AU - Teodorescu, Remus

AU - Wang, Songda

AU - Li, Shuqi

AU - Guerrero, Josep M.

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AB - 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.

KW - Capacitor voltage balancing

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