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DCSST Multi-Modular Equalization Scheme Based on Distributed Control
As an important part of the DC micro-grid, DC solid-state transformers (DCSST) usually use a dual-loop control that combines the input equalization and output voltage loop. This strategy fails to ensure output equalization when the parameters of each dual active bridge (DAB) converter module are inc...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8662455/ https://www.ncbi.nlm.nih.gov/pubmed/34884129 http://dx.doi.org/10.3390/s21238125 |
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author | Teng, Fei Kong, Dezheng Cui, Zixuan Qin, Yuan Hao, Zhenghang Rong, Na Chen, Zhuo |
author_facet | Teng, Fei Kong, Dezheng Cui, Zixuan Qin, Yuan Hao, Zhenghang Rong, Na Chen, Zhuo |
author_sort | Teng, Fei |
collection | PubMed |
description | As an important part of the DC micro-grid, DC solid-state transformers (DCSST) usually use a dual-loop control that combines the input equalization and output voltage loop. This strategy fails to ensure output equalization when the parameters of each dual active bridge (DAB) converter module are inconsistent, thus reducing the operational efficiency of the DCSST. To solve the above problems, a DCSST-balancing control strategy based on loop current suppression is presented. By fixing the phase-shifting angle within the bridge and adjusting the phase-shifting angle between bridges, the circulation current of each DAB converter module is reduced. Based on the double-loop control of the DAB, five controllers are nested outside each DAB submodule to achieve distributed control of the DCSST. The proposed control strategy can reduce the system circulation current with different circuit parameters of the submodules, ensure the balance of input voltage and output current of each submodule, and increase the robustness of the system. The simulation results verify the validity of the proposed method. |
format | Online Article Text |
id | pubmed-8662455 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-86624552021-12-11 DCSST Multi-Modular Equalization Scheme Based on Distributed Control Teng, Fei Kong, Dezheng Cui, Zixuan Qin, Yuan Hao, Zhenghang Rong, Na Chen, Zhuo Sensors (Basel) Communication As an important part of the DC micro-grid, DC solid-state transformers (DCSST) usually use a dual-loop control that combines the input equalization and output voltage loop. This strategy fails to ensure output equalization when the parameters of each dual active bridge (DAB) converter module are inconsistent, thus reducing the operational efficiency of the DCSST. To solve the above problems, a DCSST-balancing control strategy based on loop current suppression is presented. By fixing the phase-shifting angle within the bridge and adjusting the phase-shifting angle between bridges, the circulation current of each DAB converter module is reduced. Based on the double-loop control of the DAB, five controllers are nested outside each DAB submodule to achieve distributed control of the DCSST. The proposed control strategy can reduce the system circulation current with different circuit parameters of the submodules, ensure the balance of input voltage and output current of each submodule, and increase the robustness of the system. The simulation results verify the validity of the proposed method. MDPI 2021-12-04 /pmc/articles/PMC8662455/ /pubmed/34884129 http://dx.doi.org/10.3390/s21238125 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Communication Teng, Fei Kong, Dezheng Cui, Zixuan Qin, Yuan Hao, Zhenghang Rong, Na Chen, Zhuo DCSST Multi-Modular Equalization Scheme Based on Distributed Control |
title | DCSST Multi-Modular Equalization Scheme Based on Distributed Control |
title_full | DCSST Multi-Modular Equalization Scheme Based on Distributed Control |
title_fullStr | DCSST Multi-Modular Equalization Scheme Based on Distributed Control |
title_full_unstemmed | DCSST Multi-Modular Equalization Scheme Based on Distributed Control |
title_short | DCSST Multi-Modular Equalization Scheme Based on Distributed Control |
title_sort | dcsst multi-modular equalization scheme based on distributed control |
topic | Communication |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8662455/ https://www.ncbi.nlm.nih.gov/pubmed/34884129 http://dx.doi.org/10.3390/s21238125 |
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