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

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dc.citedby21
dc.contributor.authorNaderipour A.en_US
dc.contributor.authorAbdul-Malek Z.en_US
dc.contributor.authorRamachandaramurthy V.K.en_US
dc.contributor.authorKalam A.en_US
dc.contributor.authorMiveh M.R.en_US
dc.contributor.authorid36677578000en_US
dc.contributor.authorid57195728805en_US
dc.contributor.authorid6602912020en_US
dc.contributor.authorid55543249600en_US
dc.contributor.authorid55321573900en_US
dc.date.accessioned2023-05-29T07:22:53Z
dc.date.available2023-05-29T07:22:53Z
dc.date.issued2019
dc.descriptionFrequency stability; Reactive power; Restoration; Software testing; Transient analysis; Voltage control; DigSILENT power factories; Fast transient response; Hierarchical control; Islanded mode; Micro grid; Nonlinear load; Reactive power compensator; Total harmonic distortion (THD); Electric power system controlen_US
dc.description.abstractThis 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. � 2019 ISAen_US
dc.description.natureFinalen_US
dc.identifier.doi10.1016/j.isatra.2019.04.025
dc.identifier.epage369
dc.identifier.scopus2-s2.0-85065191294
dc.identifier.spage352
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85065191294&doi=10.1016%2fj.isatra.2019.04.025&partnerID=40&md5=b5e70a113224f3c4a6de59fa45a8f926
dc.identifier.urihttps://irepository.uniten.edu.my/handle/123456789/24342
dc.identifier.volume94
dc.publisherISA - Instrumentation, Systems, and Automation Societyen_US
dc.sourceScopus
dc.sourcetitleISA Transactions
dc.titleHierarchical control strategy for a three-phase 4-wire microgrid under unbalanced and nonlinear load conditionsen_US
dc.typeArticleen_US
dspace.entity.typePublication
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