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Jung, Jee-Hoon
Advanced Power Interface & Power Electronics Lab.
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Autonomous Control Strategy of DC Microgrid for Islanding mode using Power Line Communication

Author(s)
Jeong, Dong-KeunKim, Ho-SungBaek, Ju-WonKim, Hee-JeJung, Jee-Hoon
Issued Date
2018-04
DOI
10.3390/en11040924
URI
https://scholarworks.unist.ac.kr/handle/201301/24026
Fulltext
http://www.mdpi.com/1996-1073/11/4/924
Citation
ENERGIES, v.11, no.4, pp.924
Abstract
This paper proposes a DC-bus signaling (DBS) method for autonomous power management in a DC microgrid, used to improve its reliability. Centralized power management systems require communication between the power sources and loads. However, the DBS method operates based on the common DC-bus voltage and does not require communication. Based on the DC-bus voltage band, the DC-bus voltage can be used to inform the status of the DC-bus in various scenarios. The DC microgrid operates independently to maintain the system stably in the DC-bus voltage band. The DC microgrid can be divided into a grid-connected mode and an islanding mode. This paper proposes a control strategy based on power management of various independent components in islanding mode. In addition, the autonomous control method for switching the converter’s operation between grid-connected mode and islanding mode is proposed. A DC microgrid test bed consisting of a grid-connected AC/DC converter, a bidirectional DC/DC converter, a renewable energy simulator, DC home appliances and a DC-bus protector is used to test the proposed control strategy. The proposed autonomous control strategy is experimentally verified using the DC microgrid test bed.
Publisher
MDPI AG
ISSN
1996-1073
Keyword (Author)
DC microgridDC-bus signaling (DBS)autonomous control strategypower management algorithmpower line communicationrecovery control strategymoving average
Keyword
LLC RESONANT CONVERTERENERGY-STORAGE SYSTEMMANAGEMENTDESIGN

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