A bipolar-DC-bus EV fast charging station with intrinsic DC-bus voltages equalization and minimized voltage ripples

Longcheng Tan; Bin Wu; Sebastian Rivera

doi:10.1109/IECON.2015.7392426

A bipolar-DC-bus EV fast charging station with intrinsic DC-bus voltages equalization and minimized voltage ripples

Longcheng Tan, Bin Wu, Sebastian Rivera

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

14 Scopus citations

Abstract

This paper proposes a bipolar-dc-bus Electric Vehicle (EV) charging station without a line-frequency transformer at the medium-voltage grid side. It is mainly composed of the Neutral Point Clamped (NPC) converter based central ac-dc station and the parallel isolated three-level DC-DC converter based fast chargers. Due to the elimination of the line-frequency transformer, the volume and cost of the system are reduced. Meanwhile, the isolation and step-down between high dc-bus voltages and low load voltages are performed through the high-frequency transformers, leading to increased voltage utilization of switching devices. In order to guarantee the bipolar dc buses balance and minimize the dc-bus voltage ripples, the 180°-interleaved operation for the two parallel isolated three-level DC-DC converters is proposed to make the total neutral-point current zero so that all fast chargers do not bring any unbalance problems. The proposed 180°-interleaved operating principle has been analyzed in detail, then simulation results are presented to verify its performance.

Original language	English
Title of host publication	IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	2190-2195
Number of pages	6
ISBN (Electronic)	9781479917624
DOIs	https://doi.org/10.1109/IECON.2015.7392426
State	Published - 2015
Event	41st Annual Conference of the IEEE Industrial Electronics Society, IECON 2015 - Yokohama, Japan Duration: 9 Nov 2015 → 12 Nov 2015

Publication series

Name	IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society

Conference

Conference	41st Annual Conference of the IEEE Industrial Electronics Society, IECON 2015
Country/Territory	Japan
City	Yokohama
Period	9/11/15 → 12/11/15

Bibliographical note

Publisher Copyright:
© 2015 IEEE.

Keywords

Charging (batteries)
DC-DC converters
Electric inverters
Electric lines
Equalizers
High frequency transformers
Industrial electronics
Power converters
Rectifying circuits

Access to Document

10.1109/IECON.2015.7392426

Cite this

Tan, L., Wu, B., & Rivera, S. (2015). A bipolar-DC-bus EV fast charging station with intrinsic DC-bus voltages equalization and minimized voltage ripples. In IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society (pp. 2190-2195). Article 7392426 (IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/IECON.2015.7392426

Tan, Longcheng ; Wu, Bin ; Rivera, Sebastian. / A bipolar-DC-bus EV fast charging station with intrinsic DC-bus voltages equalization and minimized voltage ripples. IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society. Institute of Electrical and Electronics Engineers Inc., 2015. pp. 2190-2195 (IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society).

@inproceedings{2d5efedd1e6d4dc7972a56706a90c187,

title = "A bipolar-DC-bus EV fast charging station with intrinsic DC-bus voltages equalization and minimized voltage ripples",

abstract = "This paper proposes a bipolar-dc-bus Electric Vehicle (EV) charging station without a line-frequency transformer at the medium-voltage grid side. It is mainly composed of the Neutral Point Clamped (NPC) converter based central ac-dc station and the parallel isolated three-level DC-DC converter based fast chargers. Due to the elimination of the line-frequency transformer, the volume and cost of the system are reduced. Meanwhile, the isolation and step-down between high dc-bus voltages and low load voltages are performed through the high-frequency transformers, leading to increased voltage utilization of switching devices. In order to guarantee the bipolar dc buses balance and minimize the dc-bus voltage ripples, the 180°-interleaved operation for the two parallel isolated three-level DC-DC converters is proposed to make the total neutral-point current zero so that all fast chargers do not bring any unbalance problems. The proposed 180°-interleaved operating principle has been analyzed in detail, then simulation results are presented to verify its performance.",

keywords = "Charging (batteries), DC-DC converters, Electric inverters, Electric lines, Equalizers, High frequency transformers, Industrial electronics, Power converters, Rectifying circuits",

author = "Longcheng Tan and Bin Wu and Sebastian Rivera",

note = "Publisher Copyright: {\textcopyright} 2015 IEEE.; 41st Annual Conference of the IEEE Industrial Electronics Society, IECON 2015 ; Conference date: 09-11-2015 Through 12-11-2015",

year = "2015",

doi = "10.1109/IECON.2015.7392426",

language = "English",

series = "IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society",

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Tan, L, Wu, B & Rivera, S 2015, A bipolar-DC-bus EV fast charging station with intrinsic DC-bus voltages equalization and minimized voltage ripples. in IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society., 7392426, IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society, Institute of Electrical and Electronics Engineers Inc., pp. 2190-2195, 41st Annual Conference of the IEEE Industrial Electronics Society, IECON 2015, Yokohama, Japan, 9/11/15. https://doi.org/10.1109/IECON.2015.7392426

A bipolar-DC-bus EV fast charging station with intrinsic DC-bus voltages equalization and minimized voltage ripples. / Tan, Longcheng; Wu, Bin; Rivera, Sebastian.
IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society. Institute of Electrical and Electronics Engineers Inc., 2015. p. 2190-2195 7392426 (IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society).

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

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AU - Wu, Bin

AU - Rivera, Sebastian

PY - 2015

Y1 - 2015

N2 - This paper proposes a bipolar-dc-bus Electric Vehicle (EV) charging station without a line-frequency transformer at the medium-voltage grid side. It is mainly composed of the Neutral Point Clamped (NPC) converter based central ac-dc station and the parallel isolated three-level DC-DC converter based fast chargers. Due to the elimination of the line-frequency transformer, the volume and cost of the system are reduced. Meanwhile, the isolation and step-down between high dc-bus voltages and low load voltages are performed through the high-frequency transformers, leading to increased voltage utilization of switching devices. In order to guarantee the bipolar dc buses balance and minimize the dc-bus voltage ripples, the 180°-interleaved operation for the two parallel isolated three-level DC-DC converters is proposed to make the total neutral-point current zero so that all fast chargers do not bring any unbalance problems. The proposed 180°-interleaved operating principle has been analyzed in detail, then simulation results are presented to verify its performance.

AB - This paper proposes a bipolar-dc-bus Electric Vehicle (EV) charging station without a line-frequency transformer at the medium-voltage grid side. It is mainly composed of the Neutral Point Clamped (NPC) converter based central ac-dc station and the parallel isolated three-level DC-DC converter based fast chargers. Due to the elimination of the line-frequency transformer, the volume and cost of the system are reduced. Meanwhile, the isolation and step-down between high dc-bus voltages and low load voltages are performed through the high-frequency transformers, leading to increased voltage utilization of switching devices. In order to guarantee the bipolar dc buses balance and minimize the dc-bus voltage ripples, the 180°-interleaved operation for the two parallel isolated three-level DC-DC converters is proposed to make the total neutral-point current zero so that all fast chargers do not bring any unbalance problems. The proposed 180°-interleaved operating principle has been analyzed in detail, then simulation results are presented to verify its performance.

KW - Charging (batteries)

KW - DC-DC converters

KW - Electric inverters

KW - Electric lines

KW - Equalizers

KW - High frequency transformers

KW - Industrial electronics

KW - Power converters

KW - Rectifying circuits

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T3 - IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society

SP - 2190

EP - 2195

BT - IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 41st Annual Conference of the IEEE Industrial Electronics Society, IECON 2015

Y2 - 9 November 2015 through 12 November 2015

ER -

Tan L, Wu B, Rivera S. A bipolar-DC-bus EV fast charging station with intrinsic DC-bus voltages equalization and minimized voltage ripples. In IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society. Institute of Electrical and Electronics Engineers Inc. 2015. p. 2190-2195. 7392426. (IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society). doi: 10.1109/IECON.2015.7392426

A bipolar-DC-bus EV fast charging station with intrinsic DC-bus voltages equalization and minimized voltage ripples

Abstract

Publication series

Conference

Bibliographical note

Keywords

Access to Document

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