An enhanced consensus-based distributed secondary control for voltage regulation and proper current sharing in a DC islanded microgrid
A centralized secondary control is utilized in a DC islanded microgrid to fine-tune voltage levels following the implementation of droop control. This is done to avoid conflicts between current allocation and voltage adjustments. However, because it introduces a single point of failure, a distribute...
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Frontiers Media S.A.
2023-11-01
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Online Access: | https://www.frontiersin.org/articles/10.3389/fenrg.2023.1277198/full |
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author | Nada Mosaad Omar Abdel-Rahim Omar Abdel-Rahim Tamer F. Megahed Tamer F. Megahed Wesam Rohouma Tanemasa Asano Sobhy M. Abdelkader Sobhy M. Abdelkader |
author_facet | Nada Mosaad Omar Abdel-Rahim Omar Abdel-Rahim Tamer F. Megahed Tamer F. Megahed Wesam Rohouma Tanemasa Asano Sobhy M. Abdelkader Sobhy M. Abdelkader |
author_sort | Nada Mosaad |
collection | DOAJ |
description | A centralized secondary control is utilized in a DC islanded microgrid to fine-tune voltage levels following the implementation of droop control. This is done to avoid conflicts between current allocation and voltage adjustments. However, because it introduces a single point of failure, a distributed secondary control is preferred. This paper introduces a consensus-based secondary distributed control approach to restore critical bus voltages to their nominal values and properly distribute current among converters. The critical bus takes the lead in voltage adjustments, with only connected energy resources contributing to regulation. The microgrid is represented as an undirected graph to facilitate consensus building. Two adjustment terms, δv and δi, are generated to assist in returning voltage to its nominal level and correctly allocating current among energy resources. To enhance consistency and improve controller performance compared to those reported in existing literature, all buses are connected to a leader node. In the event of the failure of all converters except one, voltage can still be effectively restored. MATLAB-Simulink simulations are conducted on two medium-voltage DC (MVDC) microgrids to validate the efficiency of the proposed control method. The results confirmed that the proposed control method can effectively maintain voltage stability and enhance the precise distribution of current among agents by 8%. |
first_indexed | 2024-03-09T14:13:32Z |
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id | doaj.art-362e27fa850445f3a25dcc8addabfd73 |
institution | Directory Open Access Journal |
issn | 2296-598X |
language | English |
last_indexed | 2024-03-09T14:13:32Z |
publishDate | 2023-11-01 |
publisher | Frontiers Media S.A. |
record_format | Article |
series | Frontiers in Energy Research |
spelling | doaj.art-362e27fa850445f3a25dcc8addabfd732023-11-29T05:43:51ZengFrontiers Media S.A.Frontiers in Energy Research2296-598X2023-11-011110.3389/fenrg.2023.12771981277198An enhanced consensus-based distributed secondary control for voltage regulation and proper current sharing in a DC islanded microgridNada Mosaad0Omar Abdel-Rahim1Omar Abdel-Rahim2Tamer F. Megahed3Tamer F. Megahed4Wesam Rohouma5Tanemasa Asano6Sobhy M. Abdelkader7Sobhy M. Abdelkader8Electrical Power Engineering, Egypt-Japan University of Science and Technology (E-JUST), New Borg El-Arab City, Alexandria, EgyptElectrical Power Engineering, Egypt-Japan University of Science and Technology (E-JUST), New Borg El-Arab City, Alexandria, EgyptElectrical Engineering Department, Faculty of Engineering, Aswan University, Aswan, EgyptElectrical Power Engineering, Egypt-Japan University of Science and Technology (E-JUST), New Borg El-Arab City, Alexandria, EgyptElectrical Engineering Department, Faculty of Engineering, Mansoura University, El-Mansoura, EgyptElectrical Power and Renewable Energy, University of Doha for Science and Technology, Doha, QatarFaculty of Information Science and Electrical Engineering, Kyushu University, Fukuoka, JapanElectrical Power Engineering, Egypt-Japan University of Science and Technology (E-JUST), New Borg El-Arab City, Alexandria, EgyptElectrical Engineering Department, Faculty of Engineering, Mansoura University, El-Mansoura, EgyptA centralized secondary control is utilized in a DC islanded microgrid to fine-tune voltage levels following the implementation of droop control. This is done to avoid conflicts between current allocation and voltage adjustments. However, because it introduces a single point of failure, a distributed secondary control is preferred. This paper introduces a consensus-based secondary distributed control approach to restore critical bus voltages to their nominal values and properly distribute current among converters. The critical bus takes the lead in voltage adjustments, with only connected energy resources contributing to regulation. The microgrid is represented as an undirected graph to facilitate consensus building. Two adjustment terms, δv and δi, are generated to assist in returning voltage to its nominal level and correctly allocating current among energy resources. To enhance consistency and improve controller performance compared to those reported in existing literature, all buses are connected to a leader node. In the event of the failure of all converters except one, voltage can still be effectively restored. MATLAB-Simulink simulations are conducted on two medium-voltage DC (MVDC) microgrids to validate the efficiency of the proposed control method. The results confirmed that the proposed control method can effectively maintain voltage stability and enhance the precise distribution of current among agents by 8%.https://www.frontiersin.org/articles/10.3389/fenrg.2023.1277198/fullDC microgriddistributed secondary controlconsensus algorithmvoltage stabilitycurrent sharing |
spellingShingle | Nada Mosaad Omar Abdel-Rahim Omar Abdel-Rahim Tamer F. Megahed Tamer F. Megahed Wesam Rohouma Tanemasa Asano Sobhy M. Abdelkader Sobhy M. Abdelkader An enhanced consensus-based distributed secondary control for voltage regulation and proper current sharing in a DC islanded microgrid Frontiers in Energy Research DC microgrid distributed secondary control consensus algorithm voltage stability current sharing |
title | An enhanced consensus-based distributed secondary control for voltage regulation and proper current sharing in a DC islanded microgrid |
title_full | An enhanced consensus-based distributed secondary control for voltage regulation and proper current sharing in a DC islanded microgrid |
title_fullStr | An enhanced consensus-based distributed secondary control for voltage regulation and proper current sharing in a DC islanded microgrid |
title_full_unstemmed | An enhanced consensus-based distributed secondary control for voltage regulation and proper current sharing in a DC islanded microgrid |
title_short | An enhanced consensus-based distributed secondary control for voltage regulation and proper current sharing in a DC islanded microgrid |
title_sort | enhanced consensus based distributed secondary control for voltage regulation and proper current sharing in a dc islanded microgrid |
topic | DC microgrid distributed secondary control consensus algorithm voltage stability current sharing |
url | https://www.frontiersin.org/articles/10.3389/fenrg.2023.1277198/full |
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