Modular Multilevel Series-Parallel Converter with Parallel-Connected Phases and Coupled Inductors for High-Current Applications

Esteban  Concha; Sebastian  Rivera; Apparao Dekka; Ricardo Lizana F.

doi:10.1109/CHILECON60335.2023.10418732

Modular Multilevel Series-Parallel Converter with Parallel-Connected Phases and Coupled Inductors for High-Current Applications

Esteban Concha, Sebastian Rivera, Apparao Dekka, Ricardo Lizana F.

DC systems, Energy conversion & Storage

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

Abstract

Modular multilevel series-parallel converters (MM-SPC) have become a suitable solution to provide higher operating voltages, fault tolerance operation, and reliability at a reduced cost, due to their ability to achieve a simpler internal voltage balance. Therefore, MMSPC is a promising solution for applications where the nominal operating conditions are high voltage levels on the DC side and high current ratings on the AC side of the system. To allow this operation, it is necessary to design the system with parallelization in each phase. Therefore, this article proposes a design that incorporates parallelization in each phases and analyzes the internal cross-circulating current generated due to parallelization. This current creates an unbalance and internal losses in the converter. In order to compensate for the cross-circulating current, two cases are compared: the first one with decoupled inductors in their phases, and the second one with coupled inductors. This way, a comparison is made to determine which case provides greater compensation of the circulating current, allowing for the delivery of a high current at the converter's output with the least possible imbalance and internal losses.

Original language	English
Title of host publication	Proceedings of the 2023 IEEE CHILEAN Conference on Electrical, Electronics Engineering, Information and Communication Technologies (CHILECON)
Publisher	IEEE
Number of pages	6
ISBN (Electronic)	979-8-3503-6953-3
ISBN (Print)	979-8-3503-6954-0
DOIs	https://doi.org/10.1109/CHILECON60335.2023.10418732
Publication status	Published - 2023
Event	2023 IEEE CHILEAN Conference on Electrical, Electronics Engineering, Information and Communication Technologies (CHILECON) - Valdivia, Chile Duration: 5 Dec 2023 → 7 Dec 2023

Publication series

Name	Proceedings - IEEE CHILEAN Conference on Electrical, Electronics Engineering, Information and Communication Technologies, ChileCon
ISSN (Print)	2832-1529
ISSN (Electronic)	2832-1537

Conference

Conference	2023 IEEE CHILEAN Conference on Electrical, Electronics Engineering, Information and Communication Technologies (CHILECON)
Country/Territory	Chile
City	Valdivia
Period	5/12/23 → 7/12/23

Bibliographical note

Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

MMSPC
cross-circulating current
coupled inductors

Access to Document

10.1109/CHILECON60335.2023.10418732

Cite this

Concha, E., Rivera, S., Dekka, A., & Lizana F., R. (2023). Modular Multilevel Series-Parallel Converter with Parallel-Connected Phases and Coupled Inductors for High-Current Applications. In Proceedings of the 2023 IEEE CHILEAN Conference on Electrical, Electronics Engineering, Information and Communication Technologies (CHILECON) (Proceedings - IEEE CHILEAN Conference on Electrical, Electronics Engineering, Information and Communication Technologies, ChileCon). IEEE. https://doi.org/10.1109/CHILECON60335.2023.10418732

Concha, Esteban ; Rivera, Sebastian ; Dekka, Apparao et al. / Modular Multilevel Series-Parallel Converter with Parallel-Connected Phases and Coupled Inductors for High-Current Applications. Proceedings of the 2023 IEEE CHILEAN Conference on Electrical, Electronics Engineering, Information and Communication Technologies (CHILECON). IEEE, 2023. (Proceedings - IEEE CHILEAN Conference on Electrical, Electronics Engineering, Information and Communication Technologies, ChileCon).

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title = "Modular Multilevel Series-Parallel Converter with Parallel-Connected Phases and Coupled Inductors for High-Current Applications",

abstract = "Modular multilevel series-parallel converters (MM-SPC) have become a suitable solution to provide higher operating voltages, fault tolerance operation, and reliability at a reduced cost, due to their ability to achieve a simpler internal voltage balance. Therefore, MMSPC is a promising solution for applications where the nominal operating conditions are high voltage levels on the DC side and high current ratings on the AC side of the system. To allow this operation, it is necessary to design the system with parallelization in each phase. Therefore, this article proposes a design that incorporates parallelization in each phases and analyzes the internal cross-circulating current generated due to parallelization. This current creates an unbalance and internal losses in the converter. In order to compensate for the cross-circulating current, two cases are compared: the first one with decoupled inductors in their phases, and the second one with coupled inductors. This way, a comparison is made to determine which case provides greater compensation of the circulating current, allowing for the delivery of a high current at the converter's output with the least possible imbalance and internal losses.",

keywords = "MMSPC, cross-circulating current, coupled inductors",

author = "Esteban Concha and Sebastian Rivera and Apparao Dekka and {Lizana F.}, Ricardo",

note = "Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.; 2023 IEEE CHILEAN Conference on Electrical, Electronics Engineering, Information and Communication Technologies (CHILECON) ; Conference date: 05-12-2023 Through 07-12-2023",

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Concha, E, Rivera, S, Dekka, A & Lizana F., R 2023, Modular Multilevel Series-Parallel Converter with Parallel-Connected Phases and Coupled Inductors for High-Current Applications. in Proceedings of the 2023 IEEE CHILEAN Conference on Electrical, Electronics Engineering, Information and Communication Technologies (CHILECON). Proceedings - IEEE CHILEAN Conference on Electrical, Electronics Engineering, Information and Communication Technologies, ChileCon, IEEE, 2023 IEEE CHILEAN Conference on Electrical, Electronics Engineering, Information and Communication Technologies (CHILECON), Valdivia, Chile, 5/12/23. https://doi.org/10.1109/CHILECON60335.2023.10418732

Modular Multilevel Series-Parallel Converter with Parallel-Connected Phases and Coupled Inductors for High-Current Applications. / Concha, Esteban ; Rivera, Sebastian ; Dekka, Apparao et al.
Proceedings of the 2023 IEEE CHILEAN Conference on Electrical, Electronics Engineering, Information and Communication Technologies (CHILECON). IEEE, 2023. (Proceedings - IEEE CHILEAN Conference on Electrical, Electronics Engineering, Information and Communication Technologies, ChileCon).

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

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AU - Rivera, Sebastian

AU - Dekka, Apparao

AU - Lizana F., Ricardo

N1 - Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

PY - 2023

Y1 - 2023

N2 - Modular multilevel series-parallel converters (MM-SPC) have become a suitable solution to provide higher operating voltages, fault tolerance operation, and reliability at a reduced cost, due to their ability to achieve a simpler internal voltage balance. Therefore, MMSPC is a promising solution for applications where the nominal operating conditions are high voltage levels on the DC side and high current ratings on the AC side of the system. To allow this operation, it is necessary to design the system with parallelization in each phase. Therefore, this article proposes a design that incorporates parallelization in each phases and analyzes the internal cross-circulating current generated due to parallelization. This current creates an unbalance and internal losses in the converter. In order to compensate for the cross-circulating current, two cases are compared: the first one with decoupled inductors in their phases, and the second one with coupled inductors. This way, a comparison is made to determine which case provides greater compensation of the circulating current, allowing for the delivery of a high current at the converter's output with the least possible imbalance and internal losses.

AB - Modular multilevel series-parallel converters (MM-SPC) have become a suitable solution to provide higher operating voltages, fault tolerance operation, and reliability at a reduced cost, due to their ability to achieve a simpler internal voltage balance. Therefore, MMSPC is a promising solution for applications where the nominal operating conditions are high voltage levels on the DC side and high current ratings on the AC side of the system. To allow this operation, it is necessary to design the system with parallelization in each phase. Therefore, this article proposes a design that incorporates parallelization in each phases and analyzes the internal cross-circulating current generated due to parallelization. This current creates an unbalance and internal losses in the converter. In order to compensate for the cross-circulating current, two cases are compared: the first one with decoupled inductors in their phases, and the second one with coupled inductors. This way, a comparison is made to determine which case provides greater compensation of the circulating current, allowing for the delivery of a high current at the converter's output with the least possible imbalance and internal losses.

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Concha E, Rivera S, Dekka A, Lizana F. R. Modular Multilevel Series-Parallel Converter with Parallel-Connected Phases and Coupled Inductors for High-Current Applications. In Proceedings of the 2023 IEEE CHILEAN Conference on Electrical, Electronics Engineering, Information and Communication Technologies (CHILECON). IEEE. 2023. (Proceedings - IEEE CHILEAN Conference on Electrical, Electronics Engineering, Information and Communication Technologies, ChileCon). doi: 10.1109/CHILECON60335.2023.10418732

Modular Multilevel Series-Parallel Converter with Parallel-Connected Phases and Coupled Inductors for High-Current Applications

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Keywords

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