Three-phase Four-wire Bidirectional Y-converter for an Enhanced Interface between the AC Grid and the Unipolar DC Microgrid

Ahmed Y. Farag; Davide Biadene; Paolo Mattavelli; Tarek Younis

doi:10.1109/eGrid58358.2023.10380894

Three-phase Four-wire Bidirectional Y-converter for an Enhanced Interface between the AC Grid and the Unipolar DC Microgrid

Ahmed Y. Farag^*, Davide Biadene, Paolo Mattavelli, Tarek Younis

^*Corresponding author for this work

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

3 Scopus citations

Abstract

In this paper, a modified three-phase four-wire bidirectional topology is proposed for interfacing the DC microgrid with the AC utility grid. The converter comprises three four-switch buck-boost modules in a star connection, while the neutral of the AC-grid is directly connected to the positive rail of the DC side. This converter permits independent control of each of the three modules, allowing it to endure single-phase faults and adjust to unbalanced conditions. Simulation results are presented for various scenarios, including balanced AC-grid voltages in rectification and inversion modes, unbalanced AC-grid voltages with constant input resistance control, constant input current control, and constant input power control. Finally, a 7-kW experimental prototype is developed to verify the converter's analysis and simulations. The experimental results show that the converter achieved a peak efficiency of 98.87% and maintained an efficiency of 97.66% at its rated output power. Additionally, the converter exhibited resilient operation, showing stability and reliable performance under both balanced and unbalanced conditions.

Original language	English
Title of host publication	2023 8th IEEE Workshop on the Electronic Grid, eGRID 2023
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9798350327007
DOIs	https://doi.org/10.1109/eGrid58358.2023.10380894
State	Published - 2023
Externally published	Yes
Event	8th IEEE Workshop on the Electronic Grid, eGRID 2023 - Karlsruhe, Germany Duration: 16 Oct 2023 → 18 Oct 2023

Publication series

Name	2023 8th IEEE Workshop on the Electronic Grid, eGRID 2023

Conference

Conference	8th IEEE Workshop on the Electronic Grid, eGRID 2023
Country/Territory	Germany
City	Karlsruhe
Period	16/10/23 → 18/10/23

Bibliographical note

Publisher Copyright:
© 2023 IEEE.

Keywords

DC microgrid
Four-wire converters
Y-converter
three-phase modular converters
three-phase rectifiers

ASJC Scopus subject areas

Computer Networks and Communications
Energy Engineering and Power Technology
Electrical and Electronic Engineering
Safety, Risk, Reliability and Quality
Control and Optimization

Access to Document

10.1109/eGrid58358.2023.10380894

Cite this

Farag, A. Y., Biadene, D., Mattavelli, P., & Younis, T. (2023). Three-phase Four-wire Bidirectional Y-converter for an Enhanced Interface between the AC Grid and the Unipolar DC Microgrid. In 2023 8th IEEE Workshop on the Electronic Grid, eGRID 2023 (2023 8th IEEE Workshop on the Electronic Grid, eGRID 2023). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/eGrid58358.2023.10380894

@inproceedings{1587b4fd9e064b4a9b87ccce0bdd1684,

title = "Three-phase Four-wire Bidirectional Y-converter for an Enhanced Interface between the AC Grid and the Unipolar DC Microgrid",

abstract = "In this paper, a modified three-phase four-wire bidirectional topology is proposed for interfacing the DC microgrid with the AC utility grid. The converter comprises three four-switch buck-boost modules in a star connection, while the neutral of the AC-grid is directly connected to the positive rail of the DC side. This converter permits independent control of each of the three modules, allowing it to endure single-phase faults and adjust to unbalanced conditions. Simulation results are presented for various scenarios, including balanced AC-grid voltages in rectification and inversion modes, unbalanced AC-grid voltages with constant input resistance control, constant input current control, and constant input power control. Finally, a 7-kW experimental prototype is developed to verify the converter's analysis and simulations. The experimental results show that the converter achieved a peak efficiency of 98.87\% and maintained an efficiency of 97.66\% at its rated output power. Additionally, the converter exhibited resilient operation, showing stability and reliable performance under both balanced and unbalanced conditions.",

keywords = "DC microgrid, Four-wire converters, Y-converter, three-phase modular converters, three-phase rectifiers",

author = "Farag, \{Ahmed Y.\} and Davide Biadene and Paolo Mattavelli and Tarek Younis",

note = "Publisher Copyright: {\textcopyright} 2023 IEEE.; 8th IEEE Workshop on the Electronic Grid, eGRID 2023 ; Conference date: 16-10-2023 Through 18-10-2023",

year = "2023",

doi = "10.1109/eGrid58358.2023.10380894",

language = "English",

series = "2023 8th IEEE Workshop on the Electronic Grid, eGRID 2023",

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

booktitle = "2023 8th IEEE Workshop on the Electronic Grid, eGRID 2023",

address = "United States",

}

Farag, AY, Biadene, D, Mattavelli, P & Younis, T 2023, Three-phase Four-wire Bidirectional Y-converter for an Enhanced Interface between the AC Grid and the Unipolar DC Microgrid. in 2023 8th IEEE Workshop on the Electronic Grid, eGRID 2023. 2023 8th IEEE Workshop on the Electronic Grid, eGRID 2023, Institute of Electrical and Electronics Engineers Inc., 8th IEEE Workshop on the Electronic Grid, eGRID 2023, Karlsruhe, Germany, 16/10/23. https://doi.org/10.1109/eGrid58358.2023.10380894

Three-phase Four-wire Bidirectional Y-converter for an Enhanced Interface between the AC Grid and the Unipolar DC Microgrid. / Farag, Ahmed Y.; Biadene, Davide; Mattavelli, Paolo et al.
2023 8th IEEE Workshop on the Electronic Grid, eGRID 2023. Institute of Electrical and Electronics Engineers Inc., 2023. (2023 8th IEEE Workshop on the Electronic Grid, eGRID 2023).

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

TY - GEN

T1 - Three-phase Four-wire Bidirectional Y-converter for an Enhanced Interface between the AC Grid and the Unipolar DC Microgrid

AU - Farag, Ahmed Y.

AU - Biadene, Davide

AU - Mattavelli, Paolo

AU - Younis, Tarek

PY - 2023

Y1 - 2023

N2 - In this paper, a modified three-phase four-wire bidirectional topology is proposed for interfacing the DC microgrid with the AC utility grid. The converter comprises three four-switch buck-boost modules in a star connection, while the neutral of the AC-grid is directly connected to the positive rail of the DC side. This converter permits independent control of each of the three modules, allowing it to endure single-phase faults and adjust to unbalanced conditions. Simulation results are presented for various scenarios, including balanced AC-grid voltages in rectification and inversion modes, unbalanced AC-grid voltages with constant input resistance control, constant input current control, and constant input power control. Finally, a 7-kW experimental prototype is developed to verify the converter's analysis and simulations. The experimental results show that the converter achieved a peak efficiency of 98.87% and maintained an efficiency of 97.66% at its rated output power. Additionally, the converter exhibited resilient operation, showing stability and reliable performance under both balanced and unbalanced conditions.

AB - In this paper, a modified three-phase four-wire bidirectional topology is proposed for interfacing the DC microgrid with the AC utility grid. The converter comprises three four-switch buck-boost modules in a star connection, while the neutral of the AC-grid is directly connected to the positive rail of the DC side. This converter permits independent control of each of the three modules, allowing it to endure single-phase faults and adjust to unbalanced conditions. Simulation results are presented for various scenarios, including balanced AC-grid voltages in rectification and inversion modes, unbalanced AC-grid voltages with constant input resistance control, constant input current control, and constant input power control. Finally, a 7-kW experimental prototype is developed to verify the converter's analysis and simulations. The experimental results show that the converter achieved a peak efficiency of 98.87% and maintained an efficiency of 97.66% at its rated output power. Additionally, the converter exhibited resilient operation, showing stability and reliable performance under both balanced and unbalanced conditions.

KW - DC microgrid

KW - Four-wire converters

KW - Y-converter

KW - three-phase modular converters

KW - three-phase rectifiers

UR - https://www.scopus.com/pages/publications/85183589672

U2 - 10.1109/eGrid58358.2023.10380894

DO - 10.1109/eGrid58358.2023.10380894

M3 - Conference contribution

AN - SCOPUS:85183589672

T3 - 2023 8th IEEE Workshop on the Electronic Grid, eGRID 2023

BT - 2023 8th IEEE Workshop on the Electronic Grid, eGRID 2023

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 8th IEEE Workshop on the Electronic Grid, eGRID 2023

Y2 - 16 October 2023 through 18 October 2023

ER -

Farag AY, Biadene D, Mattavelli P, Younis T. Three-phase Four-wire Bidirectional Y-converter for an Enhanced Interface between the AC Grid and the Unipolar DC Microgrid. In 2023 8th IEEE Workshop on the Electronic Grid, eGRID 2023. Institute of Electrical and Electronics Engineers Inc. 2023. (2023 8th IEEE Workshop on the Electronic Grid, eGRID 2023). doi: 10.1109/eGrid58358.2023.10380894

Three-phase Four-wire Bidirectional Y-converter for an Enhanced Interface between the AC Grid and the Unipolar DC Microgrid

Abstract

Publication series

Conference

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

Fingerprint

Cite this