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Hierarchical control strategy for a three-phase 4-wire microgrid under unbalanced and nonlinear load conditions

This paper proposes an improved hierarchical control strategy consists of a primary and a secondary layer for a three-phase 4-wire microgrid under unbalanced and nonlinear load conditions. The primary layer is comprised of a multi-loop control strategy to provide balanced output voltages, a harmonic...

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Main Authors: Naderipour, Amirreza, Abdul-Malek, Zulkurnain, Ramachandaramurthy, Vigna K., Kalam, Akhtar, Miveh, Mohammad Reza
Format: Article
Published: ISA, Elsevier Ltd 2019
Subjects:
TK Electrical engineering. Electronics Nuclear engineering
Online Access:http://eprints.utm.my/id/eprint/88385/
http://dx.doi.org/10.1016/j.isatra.2019.04.025
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spelling my.utm.883852020-12-15T00:02:18Z http://eprints.utm.my/id/eprint/88385/ Hierarchical control strategy for a three-phase 4-wire microgrid under unbalanced and nonlinear load conditions Naderipour, Amirreza Abdul-Malek, Zulkurnain Ramachandaramurthy, Vigna K. Kalam, Akhtar Miveh, Mohammad Reza TK Electrical engineering. Electronics Nuclear engineering This paper proposes an improved hierarchical control strategy consists of a primary and a secondary layer for a three-phase 4-wire microgrid under unbalanced and nonlinear load conditions. The primary layer is comprised of a multi-loop control strategy to provide balanced output voltages, a harmonic compensator to reduce the total harmonic distortion (THD), and a droop-based scheme to achieve an accurate power sharing. At the secondary control layer, a reactive power compensator and a frequency restoration loop are designed to improve the accuracy of reactive power sharing and to restore the frequency deviation, respectively. Simulation studies and practical performance are carried out using the DIgSILENT Power Factory software and laboratory testing, to verify the effectiveness of the control strategy in both islanded and grid-connected mode. Zero reactive power sharing error and zero frequency steady-state error have given this control strategy an edge over the conventional control scheme. Furthermore, the proposed scheme presented outstanding voltage control performance, such as fast transient response and low voltage THD. The superiority of the proposed control strategy over the conventional filter-based control scheme is confirmed by the 2 line cycles decrease in the transient response. Additionally, the voltage THDs in islanded mode are reduced from above 5.1% to lower than 2.7% with the proposed control strategy under nonlinear load conditions. The current THD is also reduced from above 21% to lower than 2.4% in the connection point of the microgrid with the offered control scheme in the grid-connected mode. ISA, Elsevier Ltd 2019-11 Article PeerReviewed Naderipour, Amirreza and Abdul-Malek, Zulkurnain and Ramachandaramurthy, Vigna K. and Kalam, Akhtar and Miveh, Mohammad Reza (2019) Hierarchical control strategy for a three-phase 4-wire microgrid under unbalanced and nonlinear load conditions. ISA Transactions, 94 . pp. 352-369. ISSN 0019-0578 http://dx.doi.org/10.1016/j.isatra.2019.04.025 DOI:10.1016/j.isatra.2019.04.025
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic TK Electrical engineering. Electronics Nuclear engineering
spellingShingle TK Electrical engineering. Electronics Nuclear engineering
Naderipour, Amirreza
Abdul-Malek, Zulkurnain
Ramachandaramurthy, Vigna K.
Kalam, Akhtar
Miveh, Mohammad Reza
Hierarchical control strategy for a three-phase 4-wire microgrid under unbalanced and nonlinear load conditions
description This paper proposes an improved hierarchical control strategy consists of a primary and a secondary layer for a three-phase 4-wire microgrid under unbalanced and nonlinear load conditions. The primary layer is comprised of a multi-loop control strategy to provide balanced output voltages, a harmonic compensator to reduce the total harmonic distortion (THD), and a droop-based scheme to achieve an accurate power sharing. At the secondary control layer, a reactive power compensator and a frequency restoration loop are designed to improve the accuracy of reactive power sharing and to restore the frequency deviation, respectively. Simulation studies and practical performance are carried out using the DIgSILENT Power Factory software and laboratory testing, to verify the effectiveness of the control strategy in both islanded and grid-connected mode. Zero reactive power sharing error and zero frequency steady-state error have given this control strategy an edge over the conventional control scheme. Furthermore, the proposed scheme presented outstanding voltage control performance, such as fast transient response and low voltage THD. The superiority of the proposed control strategy over the conventional filter-based control scheme is confirmed by the 2 line cycles decrease in the transient response. Additionally, the voltage THDs in islanded mode are reduced from above 5.1% to lower than 2.7% with the proposed control strategy under nonlinear load conditions. The current THD is also reduced from above 21% to lower than 2.4% in the connection point of the microgrid with the offered control scheme in the grid-connected mode.
format Article
author Naderipour, Amirreza
Abdul-Malek, Zulkurnain
Ramachandaramurthy, Vigna K.
Kalam, Akhtar
Miveh, Mohammad Reza
author_facet Naderipour, Amirreza
Abdul-Malek, Zulkurnain
Ramachandaramurthy, Vigna K.
Kalam, Akhtar
Miveh, Mohammad Reza
author_sort Naderipour, Amirreza
title Hierarchical control strategy for a three-phase 4-wire microgrid under unbalanced and nonlinear load conditions
title_short Hierarchical control strategy for a three-phase 4-wire microgrid under unbalanced and nonlinear load conditions
title_full Hierarchical control strategy for a three-phase 4-wire microgrid under unbalanced and nonlinear load conditions
title_fullStr Hierarchical control strategy for a three-phase 4-wire microgrid under unbalanced and nonlinear load conditions
title_full_unstemmed Hierarchical control strategy for a three-phase 4-wire microgrid under unbalanced and nonlinear load conditions
title_sort hierarchical control strategy for a three-phase 4-wire microgrid under unbalanced and nonlinear load conditions
publisher ISA, Elsevier Ltd
publishDate 2019
url http://eprints.utm.my/id/eprint/88385/
http://dx.doi.org/10.1016/j.isatra.2019.04.025
_version_ 1687393564494921728
score 13.211869

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