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A Grid-Forming Converter with MVDC Supply and Integrated Step-Down Transformer: Modeling, Control Perspectives, and Control Hardware-in-the-Loop (C-HIL) Verification

Saeed Golestan Orcid Logo, Manuel Barrios Orcid Logo, Hessam Golmohamadi, Florin Iov Orcid Logo, Birgitte Bak-Jensen Orcid Logo, Mohammad Monfared Orcid Logo

Electronics, Volume: 13, Issue: 16, Start page: 3143

Swansea University Author: Mohammad Monfared Orcid Logo

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DOI (Published version): 10.3390/electronics13163143

Abstract

A grid-forming voltage source converter with an integrated step-down transformer could be a promising solution for supplying low-voltage alternating current loads from a medium-voltage direct current supply. However, it may require a control system that gathers feedback signals from both the primary...

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Published in: Electronics
ISSN: 2079-9292
Published: MDPI AG 2023
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URI: https://cronfa.swan.ac.uk/Record/cronfa67356
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spelling v2 67356 2024-08-09 A Grid-Forming Converter with MVDC Supply and Integrated Step-Down Transformer: Modeling, Control Perspectives, and Control Hardware-in-the-Loop (C-HIL) Verification adab4560ff08c8e5181ff3f12a4c36fb 0000-0002-8987-0883 Mohammad Monfared Mohammad Monfared true false 2024-08-09 ACEM A grid-forming voltage source converter with an integrated step-down transformer could be a promising solution for supplying low-voltage alternating current loads from a medium-voltage direct current supply. However, it may require a control system that gathers feedback signals from both the primary and secondary sides of the transformer, which in turn complicates the derivation of a standard form linear model. The absence of such a model complicates control tuning, as well as the assessment of dynamics and stability of the converter system. The objective of this paper is to address this gap in knowledge. For the case study, a conventional H-bridge converter with a step-down transformer and an -frame dual-loop grid-forming controller is considered. Initially, comprehensive guidelines on deriving a standard form linear model for this converter system are presented. Then, the impact of controlling the VSC in a frame and the changes in the transformer vector group on the small-signal model of the VSC are analyzed. The aspects of control tuning are also discussed in detail, and the model’s accuracy and efficacy are validated both theoretically and through control hardware-in-the-loop (C-HIL) tests using a Typhoon HIL setup. Journal Article Electronics 13 16 3143 MDPI AG 2079-9292 control hardware-in-the-loop (C-HIL); control tuning; grid-forming control; low-voltage alternating current (LVAC); medium-voltage direct current (MVDC); small-signal modeling; transformer; voltage source converter (VSC); voltage control 31 8 2023 2023-08-31 10.3390/electronics13163143 COLLEGE NANME Aerospace, Civil, Electrical, and Mechanical Engineering COLLEGE CODE ACEM Swansea University Not Required This project has received funding from the European Union’s Horizon 2020 research and innovation program for SERENE under grant agreement no. 957682. 2024-09-19T11:18:48.5361989 2024-08-09T10:41:44.2308909 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering Saeed Golestan 0000-0002-8568-1612 1 Manuel Barrios 0000-0001-6644-2803 2 Hessam Golmohamadi 3 Florin Iov 0000-0001-5549-3250 4 Birgitte Bak-Jensen 0000-0001-8271-1356 5 Mohammad Monfared 0000-0002-8987-0883 6 67356__31374__435bf3d0eda14ed2ac44920f8a79cd41.pdf 67356.VoR.pdf 2024-09-19T11:16:27.1570731 Output 5760540 application/pdf Version of Record true © 2024 by the authors. This is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license. true eng https://creativecommons.org/licenses/by/4.0/
title A Grid-Forming Converter with MVDC Supply and Integrated Step-Down Transformer: Modeling, Control Perspectives, and Control Hardware-in-the-Loop (C-HIL) Verification
spellingShingle A Grid-Forming Converter with MVDC Supply and Integrated Step-Down Transformer: Modeling, Control Perspectives, and Control Hardware-in-the-Loop (C-HIL) Verification
Mohammad Monfared
title_short A Grid-Forming Converter with MVDC Supply and Integrated Step-Down Transformer: Modeling, Control Perspectives, and Control Hardware-in-the-Loop (C-HIL) Verification
title_full A Grid-Forming Converter with MVDC Supply and Integrated Step-Down Transformer: Modeling, Control Perspectives, and Control Hardware-in-the-Loop (C-HIL) Verification
title_fullStr A Grid-Forming Converter with MVDC Supply and Integrated Step-Down Transformer: Modeling, Control Perspectives, and Control Hardware-in-the-Loop (C-HIL) Verification
title_full_unstemmed A Grid-Forming Converter with MVDC Supply and Integrated Step-Down Transformer: Modeling, Control Perspectives, and Control Hardware-in-the-Loop (C-HIL) Verification
title_sort A Grid-Forming Converter with MVDC Supply and Integrated Step-Down Transformer: Modeling, Control Perspectives, and Control Hardware-in-the-Loop (C-HIL) Verification
author_id_str_mv adab4560ff08c8e5181ff3f12a4c36fb
author_id_fullname_str_mv adab4560ff08c8e5181ff3f12a4c36fb_***_Mohammad Monfared
author Mohammad Monfared
author2 Saeed Golestan
Manuel Barrios
Hessam Golmohamadi
Florin Iov
Birgitte Bak-Jensen
Mohammad Monfared
format Journal article
container_title Electronics
container_volume 13
container_issue 16
container_start_page 3143
publishDate 2023
institution Swansea University
issn 2079-9292
doi_str_mv 10.3390/electronics13163143
publisher MDPI AG
college_str Faculty of Science and Engineering
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hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering
document_store_str 1
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description A grid-forming voltage source converter with an integrated step-down transformer could be a promising solution for supplying low-voltage alternating current loads from a medium-voltage direct current supply. However, it may require a control system that gathers feedback signals from both the primary and secondary sides of the transformer, which in turn complicates the derivation of a standard form linear model. The absence of such a model complicates control tuning, as well as the assessment of dynamics and stability of the converter system. The objective of this paper is to address this gap in knowledge. For the case study, a conventional H-bridge converter with a step-down transformer and an -frame dual-loop grid-forming controller is considered. Initially, comprehensive guidelines on deriving a standard form linear model for this converter system are presented. Then, the impact of controlling the VSC in a frame and the changes in the transformer vector group on the small-signal model of the VSC are analyzed. The aspects of control tuning are also discussed in detail, and the model’s accuracy and efficacy are validated both theoretically and through control hardware-in-the-loop (C-HIL) tests using a Typhoon HIL setup.
published_date 2023-08-31T11:18:48Z
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score 11.036553

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