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State of charge balancing for distributed batteries in DC microgrids ommunication networks

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Abstract
State of charge (SoC) balancing and accurate power sharing have been achieved among distributed batteries in a DC microgrid without a communication network by injecting an AC signal. The frequency of the generated signal is proportional to the SoC of a predefined master battery and it is used for the other batteries as a common variable to estimate the SoC
and output power of the master battery. Based on modified droop control, the distributed batteries realize a balanced SoC and accurate power sharing regardless of the differences in the line resistance. A communication system is not required. Thus, the system cost is notably reduced. Moreover, to guarantee system reliability, a new master battery selection method is provided to replace the master battery under fault conditions. The effectiveness of the proposed strategy was verified by simulations and experimental results.
Author(s)
이홍희호앙 득 칸
Issued Date
2021
Type
Article
Keyword
DC microgridPower sharingPower ratingBattery systemState of charge
DOI
10.1007/s43236-020-00188-3
URI
https://oak.ulsan.ac.kr/handle/2021.oak/9009
https://ulsan-primo.hosted.exlibrisgroup.com/primo-explore/fulldisplay?docid=TN_cdi_nrf_kci_oai_kci_go_kr_ARTI_9734642&context=PC&vid=ULSAN&lang=ko_KR&search_scope=default_scope&adaptor=primo_central_multiple_fe&tab=default_tab&query=any,contains,State%20of%20charge%20balancing%20for%20distributed%20batteries%20in%20DC%20microgrids%20without%20communication%20networks&offset=0&pcAvailability=true
Publisher
Journal of Power Electronics
Location
독일
Language
영어
ISSN
1598-2092
Citation Volume
21
Citation Number
2
Citation Start Page
405
Citation End Page
415
Appears in Collections:
Engineering > Electrical engineering
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