DocumentCode :
3665639
Title :
Offshore DC grids as an interconnection of radial systems: Protection and control aspects
Author :
Dragan Jovcic;Mohsen Taherbaneh;Jean Pierre Taisne;Samuel Nguefeu
Author_Institution :
Engineeirng, University of Aberdeen, Scotland
fYear :
2015
fDate :
7/1/2015 12:00:00 AM
Firstpage :
1
Lastpage :
1
Abstract :
Summary form only given: This article presents a topology for DC grids which enables very robust DC fault protection with moderate costs, good operating flexibility and simple controls. It is postulated that radial DC systems are best suited for limitedsize local DC grids. Radial topology enables robust and fast protection selectivity using only local signals and exploiting the advantages of hybrid DC circuit breakers. To enable flexible expansion options to national/international systems, it is suggested to interconnect star points of radial systems using DC/DC converters. DC/DC converters enable inherent isolation of DC faults and provide firewall between radial DC grids. Each interconnecting cable is protected by a DC/DC at one end and a hybrid Circuit Breaker at the other end. The control options for DC/DC converter and the radial grids are analysed. A detailed simulation model of 6 terminal DC grid with 2-star points is presented. The PSCAD simulation results confirm DC fault isolation and good control performance of the proposed topology for a range of DC fault contingencies.
Keywords :
"Integrated circuit interconnections","Topology","Circuit faults","Robustness","Circuit breakers","Integrated circuit modeling"
Publisher :
ieee
Conference_Titel :
Power & Energy Society General Meeting, 2015 IEEE
ISSN :
1932-5517
Type :
conf
DOI :
10.1109/PESGM.2015.7286101
Filename :
7286101
Link To Document :
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