Capacity Value of Offshore Wind in Great Britain

Gareth Harrison, S. Hawkins, D. Eager, Lucy Cradden

Research output: Contribution to journalArticlepeer-review


The extent to which large volumes of offshore wind can contribute to a secure and reliable electricity supply is the subject of much debate. Central to providing credible answers is a detailed understanding of the wind resource and its variability in time and space. Here, a mesoscale atmospheric model was employed to create a ten year hindcast of British onshore and offshore wind speeds and simulate the output of a British offshore wind fleet. This enabled estimation of the capacity value of British wind fleets both on- and offshore during periods of high winter demand. It provides a credible estimate of the distinct long-term contribution of production from a future British offshore wind fleet and indicates substantial improvement over onshore wind. Further, a first level analysis demonstrated that the availability of offshore wind farms had a modest negative impact on the capacity value of wind but that conventional generation and demand levels played a more significant role.
Original languageEnglish
Pages (from-to)360-372
JournalProceedings of the Institution of Mechanical Engineers, Part O: Journal of Risk and Reliability
Issue number5
Early online date6 Jul 2015
Publication statusPublished - 1 Oct 2015


  • Capacity value
  • offshore wind generation
  • mesoscale modelling
  • power system risk


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