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

doi:10.1109/TPEL.2018.2850360

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 journal › Journal article › Research › peer-review

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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 language	English
Article number	8395396
Journal	IEEE Transactions on Power Electronics
Volume	34
Issue number	2
Pages (from-to)	1022 - 1025
Number of pages	4
ISSN	0885-8993
DOIs	https://doi.org/10.1109/TPEL.2018.2850360
Publication status	Published - Feb 2019

Keywords

Capacitor voltage balancing
Currentless sorting and selection
Experiments
Modular Multilevel Converter

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A Currentless Sorting and Selection basedSubmitted manuscript, 772 KB

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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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AU - Teodorescu, Remus

AU - Wang, Songda

AU - Li, Shuqi

AU - Guerrero, Josep M.

PY - 2019/2

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N2 - 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.

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.

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KW - Currentless sorting and selection

KW - Experiments

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JO - IEEE Transactions on Power Electronics

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

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Advanced Control Strategies for Modular Multilevel Converters

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