Research and application of active protection technology in LVDC system

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Paper number
1391
Working Group Number
Conference name
CIRED 2019
Conference date
3-6 June 2019
Conference location
Madrid, Spain
Peer-reviewed
Yes
Short title
Convener
Authors
Xueyi, Zou, Nanjing Golden Cooperate DC Power Distribution Technology. Co.-Ltd., China
Xuezhong, Zhu, Nanjing University of Aeronautics & Astronautics, China
Zhong , Li, Nanjing Golden Cooperate DC Power Distribution Technology. Co. Ltd., China
Hao, Tong, Nanjing Golden Cooperate DC Power Distribution Technology. Co. Ltd., China
Wenbo, Chen, Nanjing Golden Cooperate DC Power Distribution Technology. Co. Ltd., China
Jianhai, Yan, Nanjing Golden Cooperate DC Power Distribution Technology. Co. Ltd., China
Abstract
During the operation of the LVDC distribution system in the building of Nanjing Golden Cooperate DC Power Distribution Technology. Co.,Ltd., we find that some faults may occur inthesystem,for example DCgroundfault, DCshort circuitfault, AC intrusionDC,DCinsulation reduction and other faults.In order to solve the aboveproblems,it’s urgent to study DC fault protectionto deal with theabove typical faults.The causes offaults and theirevolutionary processare analyzedin this paper, anda power electronic protection strategybased on power electronics technology,digital control technologyand relay protection principleis proposed,whicheffectively integratesthe DC protection with the power electronictransformer,and canrealize the active isolation and intervention of the above faults.The strategywiththe effective coordination between the protection action logic and control logiccan realize the protection and failure isolation based on the topology structure and the operation mechanism of the power electronictransformer.The principle,methodand functional compositionof theACP(ACP, short foractivecomprehensiveprotection)are analyzed,the protection mechanism and criterion of ACP, as well asthe research status of DC distribution protection are expounded in this paper .Theresultsof the actual application in the LVDC systemshow thatACPcan realize the rapid and accurate isolation of the faults in DC distribution system,the control and protection strategy is reliable in operation and quick in action,whichensuresthesteady and reliable operation of thesystem.
Table of content
Keywords
Publisher
AIM
Date
2019-06-03
Permanent link to this record
https://cired-repository.org/handle/20.500.12455/396
http://dx.doi.org/10.34890/624
ISSN
2032-9644
ISBN
978-2-9602415-0-1