Influence of statistical uncertainty of component reliability estimations on offshore wind farm availability

Matti Niclas Scheu, Athanasios Kolios, Tim Fischer, Feargal Brennan

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)
19 Downloads (Pure)


Offshore wind turbine reliability, one of the industry's biggest sources of uncertainty, is the focus of the present paper. Specifically the impact of uncertain component failure distributions at constant failure rates has been investigated with respect to its implications for wind farm availability. A fully probabilistic offshore wind simulation model has been applied to quantify results; effects shown in this paper underline the significant impact that failure probability distributions have on asset performance evaluation. It was found that wind farm availability numbers may vary in the range up to 20 % just by changing the distributions of failure to a different pattern; in particular those scenarios in which extensive failure accumulation occurred led to significant losses in production. Results are interpreted and discussed mainly from the viewpoint of an offshore wind farm developer, owner and operator, with implications underlined for application in state-of-the-art offshore wind O&M (Operations and Maintenance) models and simulation tools.

Original languageEnglish
Pages (from-to)28-39
Number of pages12
JournalReliability Engineering and System Safety
Early online date5 May 2017
Publication statusPublished - 1 Dec 2017


  • statistical uncertainty
  • maintenance modelling
  • offshore wind energy
  • operations and maintenance
  • reliability

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