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Permanent link (DOI): https://doi.org/10.7939/R3K64B19N

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Energy Management Strategy for Supercapacitor in Droop-controlled DC Microgrid Using Virtual Impedance Open Access

Descriptions

Other title
Subject/Keyword
droop-controlled DC microgrid
virtual impedance
Distributed Generation
supercapacitor
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Zhang, Yuru
Supervisor and department
Li, Yunwei (ECE)
Examining committee member and department
Xu, Wilsun (ECE)
Mohamed, Yasser (ECE)
Department
Department of Electrical and Computer Engineering
Specialization
Energy Systems
Date accepted
2015-06-30T11:29:45Z
Graduation date
2015-11
Degree
Master of Science
Degree level
Master's
Abstract
With a proper energy management strategy (EMS), supercapacitor (SC) can be integrated into droop-controlled DC microgrid as an independent supercapacitor energy storage system (SCESS). The resulting microgrid could supply repeatedly quick bursts of electrical power due to load or source transients and improve power quality and lifetime of other distributed generations (DGs) or distributed energy storages. In this thesis, a novel control strategy for SCESS is proposed. The method uses the virtual impedance loop to add a virtual resistor and a virtual capacitor connected in series between the converter and DC bus, which decouples power flow between SCESS and other DGs while ensuring the plug’n’play feature. The results show that the proposed EMS has a competing dynamic performance with excellent flexibility as compared to existing methods.
Language
English
DOI
doi:10.7939/R3K64B19N
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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