A modular multilevel converter with isolated energy-balancing modules for MV drives incorporating symmetrical six-phase machines

Mohamed S. Diab; B. W. Williams; Derrick Holliday; Ahmed M. Massoud; Shehab Ahmed

doi:10.1109/ECCE.2017.8096509

A modular multilevel converter with isolated energy-balancing modules for MV drives incorporating symmetrical six-phase machines

Mohamed S. Diab, B. W. Williams, Derrick Holliday, Ahmed M. Massoud, Shehab Ahmed

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

19 Scopus citations

Abstract

A modular multilevel converter (MMC) configuration is presented as a medium-voltage high-power drive for variablespeed applications incorporating symmetrical six-phase machines. The topology employs six standard MMC phase-legs feeding two isolated groups of three-phase machine windings, each with 60° spatial phase-displacement. A novel concept of ripple-power decoupling between adjacent sub-modules (SMs) of MMC phaselegs, while feeding machine windings in a spatial phase-opposition fashion, is realized through isolated DC-DC converter modules. This concept offers a significant reduction in SM capacitance, while eliminating the problem of SM capacitor wide voltage fluctuations, especially at low operating frequencies. Furthermore, the proposed configuration can efficiently operate at near zero frequency, therefore a machine speed-range from zero speed up to the rated speed is possible under rated torque operating conditions. The proposed MMC configuration is analyzed in detail, and its performance is validated using both simulation and experimentation.

Original language	English (US)
Title of host publication	2017 IEEE Energy Conversion Congress and Exposition, ECCE 2017
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	2715-2722
Number of pages	8
ISBN (Electronic)	9781509029983
DOIs	https://doi.org/10.1109/ECCE.2017.8096509
State	Published - Nov 3 2017
Externally published	Yes
Event	9th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2017 - Cincinnati, United States Duration: Oct 1 2017 → Oct 5 2017

Publication series

Name	2017 IEEE Energy Conversion Congress and Exposition, ECCE 2017
Volume	2017-January

Conference

Conference	9th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2017
Country/Territory	United States
City	Cincinnati
Period	10/1/17 → 10/5/17

Bibliographical note

Publisher Copyright:
© 2017 IEEE.

Keywords

Dual half-bridge (DHB)
Medium-voltage variable-speed drives
Modular multilevel converter (MMC)
Power decoupling
Sub-module (SM) capacitor voltage-ripple
Symmetrical six-phase machines

ASJC Scopus subject areas

Energy Engineering and Power Technology
Electrical and Electronic Engineering
Renewable Energy, Sustainability and the Environment
Control and Optimization

UN SDGs

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

Access to Document

10.1109/ECCE.2017.8096509

Cite this

Diab, M. S., Williams, B. W., Holliday, D., Massoud, A. M., & Ahmed, S. (2017). A modular multilevel converter with isolated energy-balancing modules for MV drives incorporating symmetrical six-phase machines. In 2017 IEEE Energy Conversion Congress and Exposition, ECCE 2017 (pp. 2715-2722). Article 8096509 (2017 IEEE Energy Conversion Congress and Exposition, ECCE 2017; Vol. 2017-January). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECCE.2017.8096509

Diab, Mohamed S. ; Williams, B. W. ; Holliday, Derrick et al. / A modular multilevel converter with isolated energy-balancing modules for MV drives incorporating symmetrical six-phase machines. 2017 IEEE Energy Conversion Congress and Exposition, ECCE 2017. Institute of Electrical and Electronics Engineers Inc., 2017. pp. 2715-2722 (2017 IEEE Energy Conversion Congress and Exposition, ECCE 2017).

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title = "A modular multilevel converter with isolated energy-balancing modules for MV drives incorporating symmetrical six-phase machines",

abstract = "A modular multilevel converter (MMC) configuration is presented as a medium-voltage high-power drive for variablespeed applications incorporating symmetrical six-phase machines. The topology employs six standard MMC phase-legs feeding two isolated groups of three-phase machine windings, each with 60° spatial phase-displacement. A novel concept of ripple-power decoupling between adjacent sub-modules (SMs) of MMC phaselegs, while feeding machine windings in a spatial phase-opposition fashion, is realized through isolated DC-DC converter modules. This concept offers a significant reduction in SM capacitance, while eliminating the problem of SM capacitor wide voltage fluctuations, especially at low operating frequencies. Furthermore, the proposed configuration can efficiently operate at near zero frequency, therefore a machine speed-range from zero speed up to the rated speed is possible under rated torque operating conditions. The proposed MMC configuration is analyzed in detail, and its performance is validated using both simulation and experimentation.",

keywords = "Dual half-bridge (DHB), Medium-voltage variable-speed drives, Modular multilevel converter (MMC), Power decoupling, Sub-module (SM) capacitor voltage-ripple, Symmetrical six-phase machines",

author = "Diab, {Mohamed S.} and Williams, {B. W.} and Derrick Holliday and Massoud, {Ahmed M.} and Shehab Ahmed",

note = "Publisher Copyright: {\textcopyright} 2017 IEEE.; 9th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2017 ; Conference date: 01-10-2017 Through 05-10-2017",

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Diab, MS, Williams, BW, Holliday, D, Massoud, AM & Ahmed, S 2017, A modular multilevel converter with isolated energy-balancing modules for MV drives incorporating symmetrical six-phase machines. in 2017 IEEE Energy Conversion Congress and Exposition, ECCE 2017., 8096509, 2017 IEEE Energy Conversion Congress and Exposition, ECCE 2017, vol. 2017-January, Institute of Electrical and Electronics Engineers Inc., pp. 2715-2722, 9th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2017, Cincinnati, United States, 10/1/17. https://doi.org/10.1109/ECCE.2017.8096509

A modular multilevel converter with isolated energy-balancing modules for MV drives incorporating symmetrical six-phase machines. / Diab, Mohamed S.; Williams, B. W.; Holliday, Derrick et al.
2017 IEEE Energy Conversion Congress and Exposition, ECCE 2017. Institute of Electrical and Electronics Engineers Inc., 2017. p. 2715-2722 8096509 (2017 IEEE Energy Conversion Congress and Exposition, ECCE 2017; Vol. 2017-January).

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

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AU - Ahmed, Shehab

PY - 2017/11/3

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N2 - A modular multilevel converter (MMC) configuration is presented as a medium-voltage high-power drive for variablespeed applications incorporating symmetrical six-phase machines. The topology employs six standard MMC phase-legs feeding two isolated groups of three-phase machine windings, each with 60° spatial phase-displacement. A novel concept of ripple-power decoupling between adjacent sub-modules (SMs) of MMC phaselegs, while feeding machine windings in a spatial phase-opposition fashion, is realized through isolated DC-DC converter modules. This concept offers a significant reduction in SM capacitance, while eliminating the problem of SM capacitor wide voltage fluctuations, especially at low operating frequencies. Furthermore, the proposed configuration can efficiently operate at near zero frequency, therefore a machine speed-range from zero speed up to the rated speed is possible under rated torque operating conditions. The proposed MMC configuration is analyzed in detail, and its performance is validated using both simulation and experimentation.

AB - A modular multilevel converter (MMC) configuration is presented as a medium-voltage high-power drive for variablespeed applications incorporating symmetrical six-phase machines. The topology employs six standard MMC phase-legs feeding two isolated groups of three-phase machine windings, each with 60° spatial phase-displacement. A novel concept of ripple-power decoupling between adjacent sub-modules (SMs) of MMC phaselegs, while feeding machine windings in a spatial phase-opposition fashion, is realized through isolated DC-DC converter modules. This concept offers a significant reduction in SM capacitance, while eliminating the problem of SM capacitor wide voltage fluctuations, especially at low operating frequencies. Furthermore, the proposed configuration can efficiently operate at near zero frequency, therefore a machine speed-range from zero speed up to the rated speed is possible under rated torque operating conditions. The proposed MMC configuration is analyzed in detail, and its performance is validated using both simulation and experimentation.

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Y2 - 1 October 2017 through 5 October 2017

ER -

Diab MS, Williams BW, Holliday D, Massoud AM, Ahmed S. A modular multilevel converter with isolated energy-balancing modules for MV drives incorporating symmetrical six-phase machines. In 2017 IEEE Energy Conversion Congress and Exposition, ECCE 2017. Institute of Electrical and Electronics Engineers Inc. 2017. p. 2715-2722. 8096509. (2017 IEEE Energy Conversion Congress and Exposition, ECCE 2017). doi: 10.1109/ECCE.2017.8096509

A modular multilevel converter with isolated energy-balancing modules for MV drives incorporating symmetrical six-phase machines

Abstract

Publication series

Conference

Bibliographical note

Keywords

ASJC Scopus subject areas

UN SDGs

Access to Document

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Cite this