Modular multilevel structure of a high power dual active bridge DC transformer with stepped two-level output

Azmy Gowaid; G. P. Adam; A. M. Massoud; S. Ahmed; D. Holliday; B. W. Williams

doi:10.1109/EPE.2014.6911044

Modular multilevel structure of a high power dual active bridge DC transformer with stepped two-level output

Azmy Gowaid, G. P. Adam, A. M. Massoud, S. Ahmed, D. Holliday, B. W. Williams

Electrical Power Engineering

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

22 Citations (Scopus)

Abstract

This paper addresses the issues of dc voltage matching and dc fault protection in potential super-grids. An approach for high power dc-dc conversion is proposed and analyzed. A front-to-front connection of modular-multilevel converters (MMC) forms a dual active bridge (DAB)-like structure. Near two-level operation is achieved by sequential switching of half-bridge chopper cells. This alleviates dv/dt stress exercised by two-level DAB configurations on the ac stage. The operating mode, switching patterns necessary are distinct from conventional MMC. Furthermore, common-mode currents, cell capacitance size, arm inductances are significantly reduced. The considered structure is shown to be useful for high power applications due to the low switching frequency, modularity, reliability and dc fault isolation capability. Various operation aspects are illustrated using simulations. A reduced-scale test rig provides an experimental proof of the concept.

Original language	English
Title of host publication	2014 16th European Conference on Power Electronics and Applications, EPE-ECCE Europe 2014
Publisher	IEEE
Pages	1-10
Number of pages	10
ISBN (Electronic)	9781479930159
ISBN (Print)	9781479930166, 9781479930142
DOIs	https://doi.org/10.1109/EPE.2014.6911044
Publication status	Published - 29 Sept 2014
Event	European Conference on Power Electronics and Applications 2014 - Lappeenranta, Finland Duration: 26 Aug 2014 → 28 Aug 2014 Conference number: 16 https://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=6898115

Publication series

Name	2014 16th European Conference on Power Electronics and Applications, EPE-ECCE Europe 2014

Conference

Conference	European Conference on Power Electronics and Applications 2014
Abbreviated title	EPE'14-ECCE Europe
Country/Territory	Finland
City	Lappeenranta
Period	26/08/14 → 28/08/14
Internet address	https://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=6898115

Keywords

DC-DC power convertors
bridge circuits
choppers (circuits)
switching convertors
DC fault isolation
DC fault protection
DC voltage matching
DC-DC power conversion
dual active bridge-like structure
half bridge chopper cell
high power dual active bridge DC transformer
modular multilevel converters
modular multilevel structure
sequential switching
stepped two level output transformer
Bridge circuits
Capacitance
Capacitors
Inductance
Power transformer insulation
Switches
HVDC
High voltage power converters
Multilevel converters
Power transmission
Voltage Source Converter (VSC)

ASJC Scopus subject areas

Electrical and Electronic Engineering

Documents and Links

10.1109/EPE.2014.6911044

Cite this

Gowaid, A., Adam, G. P., Massoud, A. M., Ahmed, S., Holliday, D., & Williams, B. W. (2014). Modular multilevel structure of a high power dual active bridge DC transformer with stepped two-level output. In 2014 16th European Conference on Power Electronics and Applications, EPE-ECCE Europe 2014 (pp. 1-10). (2014 16th European Conference on Power Electronics and Applications, EPE-ECCE Europe 2014). IEEE. https://doi.org/10.1109/EPE.2014.6911044

@inproceedings{b542361019f54293bf1341542867825d,

title = "Modular multilevel structure of a high power dual active bridge DC transformer with stepped two-level output",

abstract = "This paper addresses the issues of dc voltage matching and dc fault protection in potential super-grids. An approach for high power dc-dc conversion is proposed and analyzed. A front-to-front connection of modular-multilevel converters (MMC) forms a dual active bridge (DAB)-like structure. Near two-level operation is achieved by sequential switching of half-bridge chopper cells. This alleviates dv/dt stress exercised by two-level DAB configurations on the ac stage. The operating mode, switching patterns necessary are distinct from conventional MMC. Furthermore, common-mode currents, cell capacitance size, arm inductances are significantly reduced. The considered structure is shown to be useful for high power applications due to the low switching frequency, modularity, reliability and dc fault isolation capability. Various operation aspects are illustrated using simulations. A reduced-scale test rig provides an experimental proof of the concept.",

keywords = "DC-DC power convertors, bridge circuits, choppers (circuits), switching convertors, DC fault isolation, DC fault protection, DC voltage matching, DC-DC power conversion, dual active bridge-like structure, half bridge chopper cell, high power dual active bridge DC transformer, modular multilevel converters, modular multilevel structure, sequential switching, stepped two level output transformer, Bridge circuits, Capacitance, Capacitors, Inductance, Power transformer insulation, Switches, HVDC, High voltage power converters, Multilevel converters, Power transmission, Voltage Source Converter (VSC)",

author = "Azmy Gowaid and Adam, {G. P.} and Massoud, {A. M.} and S. Ahmed and D. Holliday and Williams, {B. W.}",

note = "Created event 16-04-18; European Conference on Power Electronics and Applications 2014, EPE'14-ECCE Europe ; Conference date: 26-08-2014 Through 28-08-2014",

year = "2014",

month = sep,

day = "29",

doi = "10.1109/EPE.2014.6911044",

language = "English",

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series = "2014 16th European Conference on Power Electronics and Applications, EPE-ECCE Europe 2014",

publisher = "IEEE",

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booktitle = "2014 16th European Conference on Power Electronics and Applications, EPE-ECCE Europe 2014",

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Gowaid, A, Adam, GP, Massoud, AM, Ahmed, S, Holliday, D & Williams, BW 2014, Modular multilevel structure of a high power dual active bridge DC transformer with stepped two-level output. in 2014 16th European Conference on Power Electronics and Applications, EPE-ECCE Europe 2014. 2014 16th European Conference on Power Electronics and Applications, EPE-ECCE Europe 2014, IEEE, pp. 1-10, European Conference on Power Electronics and Applications 2014, Lappeenranta, Finland, 26/08/14. https://doi.org/10.1109/EPE.2014.6911044

Modular multilevel structure of a high power dual active bridge DC transformer with stepped two-level output. / Gowaid, Azmy; Adam, G. P.; Massoud, A. M. et al.
2014 16th European Conference on Power Electronics and Applications, EPE-ECCE Europe 2014. IEEE, 2014. p. 1-10 (2014 16th European Conference on Power Electronics and Applications, EPE-ECCE Europe 2014).

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

TY - GEN

T1 - Modular multilevel structure of a high power dual active bridge DC transformer with stepped two-level output

AU - Gowaid, Azmy

AU - Adam, G. P.

AU - Massoud, A. M.

AU - Ahmed, S.

AU - Holliday, D.

AU - Williams, B. W.

N1 - Conference code: 16

PY - 2014/9/29

Y1 - 2014/9/29

N2 - This paper addresses the issues of dc voltage matching and dc fault protection in potential super-grids. An approach for high power dc-dc conversion is proposed and analyzed. A front-to-front connection of modular-multilevel converters (MMC) forms a dual active bridge (DAB)-like structure. Near two-level operation is achieved by sequential switching of half-bridge chopper cells. This alleviates dv/dt stress exercised by two-level DAB configurations on the ac stage. The operating mode, switching patterns necessary are distinct from conventional MMC. Furthermore, common-mode currents, cell capacitance size, arm inductances are significantly reduced. The considered structure is shown to be useful for high power applications due to the low switching frequency, modularity, reliability and dc fault isolation capability. Various operation aspects are illustrated using simulations. A reduced-scale test rig provides an experimental proof of the concept.

AB - This paper addresses the issues of dc voltage matching and dc fault protection in potential super-grids. An approach for high power dc-dc conversion is proposed and analyzed. A front-to-front connection of modular-multilevel converters (MMC) forms a dual active bridge (DAB)-like structure. Near two-level operation is achieved by sequential switching of half-bridge chopper cells. This alleviates dv/dt stress exercised by two-level DAB configurations on the ac stage. The operating mode, switching patterns necessary are distinct from conventional MMC. Furthermore, common-mode currents, cell capacitance size, arm inductances are significantly reduced. The considered structure is shown to be useful for high power applications due to the low switching frequency, modularity, reliability and dc fault isolation capability. Various operation aspects are illustrated using simulations. A reduced-scale test rig provides an experimental proof of the concept.

KW - DC-DC power convertors

KW - bridge circuits

KW - choppers (circuits)

KW - switching convertors

KW - DC fault isolation

KW - DC fault protection

KW - DC voltage matching

KW - DC-DC power conversion

KW - dual active bridge-like structure

KW - half bridge chopper cell

KW - high power dual active bridge DC transformer

KW - modular multilevel converters

KW - modular multilevel structure

KW - sequential switching

KW - stepped two level output transformer

KW - Bridge circuits

KW - Capacitance

KW - Capacitors

KW - Inductance

KW - Power transformer insulation

KW - Switches

KW - HVDC

KW - High voltage power converters

KW - Multilevel converters

KW - Power transmission

KW - Voltage Source Converter (VSC)

U2 - 10.1109/EPE.2014.6911044

DO - 10.1109/EPE.2014.6911044

M3 - Conference contribution

SN - 9781479930166

SN - 9781479930142

T3 - 2014 16th European Conference on Power Electronics and Applications, EPE-ECCE Europe 2014

SP - 1

EP - 10

BT - 2014 16th European Conference on Power Electronics and Applications, EPE-ECCE Europe 2014

PB - IEEE

T2 - European Conference on Power Electronics and Applications 2014

Y2 - 26 August 2014 through 28 August 2014

ER -

Gowaid A, Adam GP, Massoud AM, Ahmed S, Holliday D, Williams BW. Modular multilevel structure of a high power dual active bridge DC transformer with stepped two-level output. In 2014 16th European Conference on Power Electronics and Applications, EPE-ECCE Europe 2014. IEEE. 2014. p. 1-10. (2014 16th European Conference on Power Electronics and Applications, EPE-ECCE Europe 2014). doi: 10.1109/EPE.2014.6911044

Modular multilevel structure of a high power dual active bridge DC transformer with stepped two-level output

Abstract

Publication series

Conference

Keywords

ASJC Scopus subject areas

Documents and Links

Fingerprint

Cite this