Continuous Operation of Smart Transformer-fed Distribution Grid with Single-phase Faults

Rongwu Zhu; Marco Liserre

doi:10.1109/ECCE.2018.8558226

Continuous Operation of Smart Transformer-fed Distribution Grid with Single-phase Faults

Rongwu Zhu
, Marco Liserre

Kiel University

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

8 Scopus citations

Abstract

Solid-state transformer-based Smart Transformer (ST) allows integrating energy storages and electric vehicle charging stations, while offering ancillary services to electric grid. The continuity of service in power supply as a basic requirement for the electric grid operation is threatened and interrupted by grid faults in the conventional distribution transformer (CDT)-fed electric grid, but can be ensured by the ST. Unlike the CDT, the ST can switch from three-phase operation mode to two-phase operation mode, ensuring continuous power supply in two healthy phases and reducing outage area, during single-phase to ground faults (SFGFs). An improved voltage control strategy is proposed to balance the power losses reduction in neutral conductor and voltage oscillation suppression in DC-link during two-phase operation mode. This paper focuses on the performances design of ST voltage control during the two-phase operation mode to improve the grid voltage transient performances. The simulation and experimental results clearly verify the effectiveness and correctness of the proposed strategy.

Original language	English
Title of host publication	2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	458-464
Number of pages	7
ISBN (Electronic)	9781479973118
DOIs	https://doi.org/10.1109/ECCE.2018.8558226
State	Published - 3 Dec 2018
Externally published	Yes
Event	10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018 - Portland, United States Duration: 23 Sep 2018 → 27 Sep 2018

Publication series

Name	2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018

Conference

Conference	10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018
Country/Territory	United States
City	Portland
Period	23/09/18 → 27/09/18

UN SDGs

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

SDG 7 Affordable and Clean Energy

Keywords

Asymmetrical operation
Grid fault
Neutral line current
Smart transformer

Access to Document

10.1109/ECCE.2018.8558226

Cite this

Zhu, R., & Liserre, M. (2018). Continuous Operation of Smart Transformer-fed Distribution Grid with Single-phase Faults. In 2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018 (pp. 458-464). Article 8558226 (2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECCE.2018.8558226

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title = "Continuous Operation of Smart Transformer-fed Distribution Grid with Single-phase Faults",

abstract = "Solid-state transformer-based Smart Transformer (ST) allows integrating energy storages and electric vehicle charging stations, while offering ancillary services to electric grid. The continuity of service in power supply as a basic requirement for the electric grid operation is threatened and interrupted by grid faults in the conventional distribution transformer (CDT)-fed electric grid, but can be ensured by the ST. Unlike the CDT, the ST can switch from three-phase operation mode to two-phase operation mode, ensuring continuous power supply in two healthy phases and reducing outage area, during single-phase to ground faults (SFGFs). An improved voltage control strategy is proposed to balance the power losses reduction in neutral conductor and voltage oscillation suppression in DC-link during two-phase operation mode. This paper focuses on the performances design of ST voltage control during the two-phase operation mode to improve the grid voltage transient performances. The simulation and experimental results clearly verify the effectiveness and correctness of the proposed strategy.",

keywords = "Asymmetrical operation, Grid fault, Neutral line current, Smart transformer",

author = "Rongwu Zhu and Marco Liserre",

note = "Publisher Copyright: {\textcopyright} 2018 IEEE.; 10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018 ; Conference date: 23-09-2018 Through 27-09-2018",

year = "2018",

month = dec,

day = "3",

doi = "10.1109/ECCE.2018.8558226",

language = "英语",

series = "2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

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booktitle = "2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018",

address = "美国",

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Zhu, R & Liserre, M 2018, Continuous Operation of Smart Transformer-fed Distribution Grid with Single-phase Faults. in 2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018., 8558226, 2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018, Institute of Electrical and Electronics Engineers Inc., pp. 458-464, 10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018, Portland, United States, 23/09/18. https://doi.org/10.1109/ECCE.2018.8558226

Continuous Operation of Smart Transformer-fed Distribution Grid with Single-phase Faults. / Zhu, Rongwu; Liserre, Marco.
2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018. Institute of Electrical and Electronics Engineers Inc., 2018. p. 458-464 8558226 (2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018).

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

TY - GEN

T1 - Continuous Operation of Smart Transformer-fed Distribution Grid with Single-phase Faults

AU - Zhu, Rongwu

AU - Liserre, Marco

PY - 2018/12/3

Y1 - 2018/12/3

N2 - Solid-state transformer-based Smart Transformer (ST) allows integrating energy storages and electric vehicle charging stations, while offering ancillary services to electric grid. The continuity of service in power supply as a basic requirement for the electric grid operation is threatened and interrupted by grid faults in the conventional distribution transformer (CDT)-fed electric grid, but can be ensured by the ST. Unlike the CDT, the ST can switch from three-phase operation mode to two-phase operation mode, ensuring continuous power supply in two healthy phases and reducing outage area, during single-phase to ground faults (SFGFs). An improved voltage control strategy is proposed to balance the power losses reduction in neutral conductor and voltage oscillation suppression in DC-link during two-phase operation mode. This paper focuses on the performances design of ST voltage control during the two-phase operation mode to improve the grid voltage transient performances. The simulation and experimental results clearly verify the effectiveness and correctness of the proposed strategy.

AB - Solid-state transformer-based Smart Transformer (ST) allows integrating energy storages and electric vehicle charging stations, while offering ancillary services to electric grid. The continuity of service in power supply as a basic requirement for the electric grid operation is threatened and interrupted by grid faults in the conventional distribution transformer (CDT)-fed electric grid, but can be ensured by the ST. Unlike the CDT, the ST can switch from three-phase operation mode to two-phase operation mode, ensuring continuous power supply in two healthy phases and reducing outage area, during single-phase to ground faults (SFGFs). An improved voltage control strategy is proposed to balance the power losses reduction in neutral conductor and voltage oscillation suppression in DC-link during two-phase operation mode. This paper focuses on the performances design of ST voltage control during the two-phase operation mode to improve the grid voltage transient performances. The simulation and experimental results clearly verify the effectiveness and correctness of the proposed strategy.

KW - Asymmetrical operation

KW - Grid fault

KW - Neutral line current

KW - Smart transformer

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U2 - 10.1109/ECCE.2018.8558226

DO - 10.1109/ECCE.2018.8558226

M3 - 会议稿件

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T3 - 2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018

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PB - Institute of Electrical and Electronics Engineers Inc.

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Y2 - 23 September 2018 through 27 September 2018

ER -

Continuous Operation of Smart Transformer-fed Distribution Grid with Single-phase Faults

Abstract

Publication series

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UN SDGs

Keywords

Access to Document

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