A reliability evaluation of offshore HVDC grid configuration options

Callum MacIver, Keith R. W. Bell, Duško P. Nedić

Research output: Contribution to journalSpecial issuepeer-review

37 Citations (Scopus)
595 Downloads (Pure)


This paper details a methodology for investigating the reliability of different offshore grid design options for the connection of offshore wind power to shore. The methodology uses a sequential Monte Carlo based technique that allows investigation of realistic offshore phenomena such as the weather dependency of component repair times. A number of case studies are examined for the connection to shore of a cluster of far offshore wind farms and a cost benefit analysis is performed which compares the capital costs, electrical losses and reliability of each. There is shown to be clear value in options that have inherent redundancy and alternative protection strategies which avoid the use of expensive DC circuit breakers are shown to be potentially viable. It is also found that low probability, high impact faults such as transmission branch failures are a key driver behind overall grid reliability.
Original languageEnglish
Pages (from-to)810-819
Number of pages10
JournalIEEE Transactions on Power Delivery
Issue number2
Early online date26 May 2015
Publication statusPublished - 1 Apr 2016


  • HVDC transmission
  • reliability modeling
  • offshore grid
  • offshore wind energy
  • circuit faults
  • maintenance engineering


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