Control strategy to balance operation of parallel connected legs of modular multilevel converters

Josep Pou; Salvador Ceballos; Georgios Konstantinou; Gabriel J. Capella; Vassilios G. Agelidis

doi:10.1109/ISIE.2013.6563685

Control strategy to balance operation of parallel connected legs of modular multilevel converters

Josep Pou
, Salvador Ceballos
, Georgios Konstantinou
, Gabriel J. Capella
, Vassilios G. Agelidis

Digitization of equipment for the electrical grid

University of New South Wales
Polytechnic University of Catalonia

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

31 Citations (Scopus)

Abstract

Connecting legs of modular multilevel converters (MMCs) in parallel can assist an MMC-based high-voltage direct current (HVDC) to increase its current ratings and hence overall power handling capability. Consequently, each phase of the MMC would be integrated by several legs or sets of upper and lower arms (ULAs). This paper proposes a current control strategy for each ULA in order to ensure balanced current sharing among them. In addition, each ULA has its own circulating current control that follows a reference obtained from the instantaneous magnitudes of the output current and the modulation signal. All the proposed control actuations do not distort the phase output voltage of the MMC which follows the reference voltage. The performance of the proposed control strategies is evaluated by simulation studies in the PLECS Blockset under MATLAB/Simulink software platform.

Original language	English
Title of host publication	2013 IEEE International Symposium on Industrial Electronics, ISIE 2013
DOIs	https://doi.org/10.1109/ISIE.2013.6563685
Publication status	Published - 2013
Event	2013 IEEE 22nd International Symposium on Industrial Electronics, ISIE 2013 - Taipei, Taiwan, Province of China Duration: 28 May 2013 → 31 May 2013

Publication series

Name	IEEE International Symposium on Industrial Electronics

Conference

Conference	2013 IEEE 22nd International Symposium on Industrial Electronics, ISIE 2013
Country/Territory	Taiwan, Province of China
City	Taipei
Period	28/05/13 → 31/05/13

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Circulating current control
Current balance
Modular multilevel converter
Parallel legs

Access to Document

10.1109/ISIE.2013.6563685

Cite this

Pou, J., Ceballos, S., Konstantinou, G., Capella, G. J., & Agelidis, V. G. (2013). Control strategy to balance operation of parallel connected legs of modular multilevel converters. In 2013 IEEE International Symposium on Industrial Electronics, ISIE 2013 Article 6563685 (IEEE International Symposium on Industrial Electronics). https://doi.org/10.1109/ISIE.2013.6563685

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title = "Control strategy to balance operation of parallel connected legs of modular multilevel converters",

abstract = "Connecting legs of modular multilevel converters (MMCs) in parallel can assist an MMC-based high-voltage direct current (HVDC) to increase its current ratings and hence overall power handling capability. Consequently, each phase of the MMC would be integrated by several legs or sets of upper and lower arms (ULAs). This paper proposes a current control strategy for each ULA in order to ensure balanced current sharing among them. In addition, each ULA has its own circulating current control that follows a reference obtained from the instantaneous magnitudes of the output current and the modulation signal. All the proposed control actuations do not distort the phase output voltage of the MMC which follows the reference voltage. The performance of the proposed control strategies is evaluated by simulation studies in the PLECS Blockset under MATLAB/Simulink software platform.",

keywords = "Circulating current control, Current balance, Modular multilevel converter, Parallel legs",

author = "Josep Pou and Salvador Ceballos and Georgios Konstantinou and Capella, \{Gabriel J.\} and Agelidis, \{Vassilios G.\}",

year = "2013",

doi = "10.1109/ISIE.2013.6563685",

language = "English",

isbn = "9781467351942",

series = "IEEE International Symposium on Industrial Electronics",

booktitle = "2013 IEEE International Symposium on Industrial Electronics, ISIE 2013",

note = "2013 IEEE 22nd International Symposium on Industrial Electronics, ISIE 2013 ; Conference date: 28-05-2013 Through 31-05-2013",

}

Pou, J, Ceballos, S, Konstantinou, G, Capella, GJ & Agelidis, VG 2013, Control strategy to balance operation of parallel connected legs of modular multilevel converters. in 2013 IEEE International Symposium on Industrial Electronics, ISIE 2013., 6563685, IEEE International Symposium on Industrial Electronics, 2013 IEEE 22nd International Symposium on Industrial Electronics, ISIE 2013, Taipei, Taiwan, Province of China, 28/05/13. https://doi.org/10.1109/ISIE.2013.6563685

Control strategy to balance operation of parallel connected legs of modular multilevel converters. / Pou, Josep; Ceballos, Salvador; Konstantinou, Georgios et al.
2013 IEEE International Symposium on Industrial Electronics, ISIE 2013. 2013. 6563685 (IEEE International Symposium on Industrial Electronics).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Control strategy to balance operation of parallel connected legs of modular multilevel converters

AU - Pou, Josep

AU - Ceballos, Salvador

AU - Konstantinou, Georgios

AU - Capella, Gabriel J.

AU - Agelidis, Vassilios G.

PY - 2013

Y1 - 2013

N2 - Connecting legs of modular multilevel converters (MMCs) in parallel can assist an MMC-based high-voltage direct current (HVDC) to increase its current ratings and hence overall power handling capability. Consequently, each phase of the MMC would be integrated by several legs or sets of upper and lower arms (ULAs). This paper proposes a current control strategy for each ULA in order to ensure balanced current sharing among them. In addition, each ULA has its own circulating current control that follows a reference obtained from the instantaneous magnitudes of the output current and the modulation signal. All the proposed control actuations do not distort the phase output voltage of the MMC which follows the reference voltage. The performance of the proposed control strategies is evaluated by simulation studies in the PLECS Blockset under MATLAB/Simulink software platform.

AB - Connecting legs of modular multilevel converters (MMCs) in parallel can assist an MMC-based high-voltage direct current (HVDC) to increase its current ratings and hence overall power handling capability. Consequently, each phase of the MMC would be integrated by several legs or sets of upper and lower arms (ULAs). This paper proposes a current control strategy for each ULA in order to ensure balanced current sharing among them. In addition, each ULA has its own circulating current control that follows a reference obtained from the instantaneous magnitudes of the output current and the modulation signal. All the proposed control actuations do not distort the phase output voltage of the MMC which follows the reference voltage. The performance of the proposed control strategies is evaluated by simulation studies in the PLECS Blockset under MATLAB/Simulink software platform.

KW - Circulating current control

KW - Current balance

KW - Modular multilevel converter

KW - Parallel legs

UR - https://www.scopus.com/pages/publications/84881618236

U2 - 10.1109/ISIE.2013.6563685

DO - 10.1109/ISIE.2013.6563685

M3 - Conference contribution

AN - SCOPUS:84881618236

SN - 9781467351942

T3 - IEEE International Symposium on Industrial Electronics

BT - 2013 IEEE International Symposium on Industrial Electronics, ISIE 2013

T2 - 2013 IEEE 22nd International Symposium on Industrial Electronics, ISIE 2013

Y2 - 28 May 2013 through 31 May 2013

ER -

Control strategy to balance operation of parallel connected legs of modular multilevel converters

Abstract

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UN SDGs

Keywords

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