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Accurate Active and Reactive Power Sharing Based on a Modified Droop Control Method for Islanded Microgrids

When multiple paralleled distributed generation (DG) units operate in an islanded microgrid, accurate power sharing of each DG unit cannot be achieved with a conventional droop control strategy due to mismatched feeder impedance. In this paper, a small AC signal (SACS)-injection-based modified droop...

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Detalles Bibliográficos
Autores principales: Zhang, Zhi, Gao, Sheng, Zhong, Caomao, Zhang, Zhaoyun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10386575/
https://www.ncbi.nlm.nih.gov/pubmed/37514562
http://dx.doi.org/10.3390/s23146269
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author Zhang, Zhi
Gao, Sheng
Zhong, Caomao
Zhang, Zhaoyun
author_facet Zhang, Zhi
Gao, Sheng
Zhong, Caomao
Zhang, Zhaoyun
author_sort Zhang, Zhi
collection PubMed
description When multiple paralleled distributed generation (DG) units operate in an islanded microgrid, accurate power sharing of each DG unit cannot be achieved with a conventional droop control strategy due to mismatched feeder impedance. In this paper, a small AC signal (SACS)-injection-based modified droop control method is presented for accurate active and reactive power sharing among DG units. The proposed control method adjusts the voltage amplitude of each DG unit by injecting small AC signals to form a reactive power control loop. This strategy does not need communication links or to specifically obtain the physical parameter of the feeder impedance and only requires the local information. Moreover, the parameter design procedure and stability analysis are given full consideration. Finally, simulation and experimental results verify the effectiveness of the proposed control scheme, and accurate active and reactive power sharing can be achieved.
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spelling pubmed-103865752023-07-30 Accurate Active and Reactive Power Sharing Based on a Modified Droop Control Method for Islanded Microgrids Zhang, Zhi Gao, Sheng Zhong, Caomao Zhang, Zhaoyun Sensors (Basel) Article When multiple paralleled distributed generation (DG) units operate in an islanded microgrid, accurate power sharing of each DG unit cannot be achieved with a conventional droop control strategy due to mismatched feeder impedance. In this paper, a small AC signal (SACS)-injection-based modified droop control method is presented for accurate active and reactive power sharing among DG units. The proposed control method adjusts the voltage amplitude of each DG unit by injecting small AC signals to form a reactive power control loop. This strategy does not need communication links or to specifically obtain the physical parameter of the feeder impedance and only requires the local information. Moreover, the parameter design procedure and stability analysis are given full consideration. Finally, simulation and experimental results verify the effectiveness of the proposed control scheme, and accurate active and reactive power sharing can be achieved. MDPI 2023-07-10 /pmc/articles/PMC10386575/ /pubmed/37514562 http://dx.doi.org/10.3390/s23146269 Text en © 2023 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 Article
Zhang, Zhi
Gao, Sheng
Zhong, Caomao
Zhang, Zhaoyun
Accurate Active and Reactive Power Sharing Based on a Modified Droop Control Method for Islanded Microgrids
title Accurate Active and Reactive Power Sharing Based on a Modified Droop Control Method for Islanded Microgrids
title_full Accurate Active and Reactive Power Sharing Based on a Modified Droop Control Method for Islanded Microgrids
title_fullStr Accurate Active and Reactive Power Sharing Based on a Modified Droop Control Method for Islanded Microgrids
title_full_unstemmed Accurate Active and Reactive Power Sharing Based on a Modified Droop Control Method for Islanded Microgrids
title_short Accurate Active and Reactive Power Sharing Based on a Modified Droop Control Method for Islanded Microgrids
title_sort accurate active and reactive power sharing based on a modified droop control method for islanded microgrids
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10386575/
https://www.ncbi.nlm.nih.gov/pubmed/37514562
http://dx.doi.org/10.3390/s23146269
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