Reliability assessment of Wind turbines

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Abstract

Wind turbines can be considered as structures that are in between civil engineering structures and machines since they consist of structural components and many electrical and machine components together with a control system. Further, a wind turbine is not a one-of-a-kind structure but manufactured in series production based on many component tests, some prototype tests and zeroseries wind turbines. These characteristics influence the reliability assessment where focus in this paper is on the structural components. Levelized Cost Of Energy is very important for wind energy, especially when comparing to other energy sources. Therefore much focus is on cost reductions and improved reliability both for offshore and onshore wind turbines. The wind turbine components should be designed to have sufficient reliability level with respect to both extreme and fatigue loads but also not be too costly (and safe). In probabilistic design the single components are designed to a level of reliability, which accounts for an optimal balance between failure consequences, cost of operation & maintenance, material costs and the probability of failure. Furthermore, using a probabilistic design basis for reliability assessment it is possible to design wind turbines such that site-specific information on climate parameters can be included. Illustrative examples are presented considering uncertainty modeling, reliability assessment and reliability-based calibration of partial safety factors for structural wind turbine components exposed to extreme loads and fatigue loads.
Original languageEnglish
Title of host publication12th International Conference on Applications of Statistics and Probability in Civil Engineering
Publication date2015
Publication statusPublished - 2015
Event12th International Conference on Applications of Statistics and Probability in Civil Engineering - Vancouver, Canada
Duration: 12 Jul 201515 Jul 2015
Conference number: 12

Conference

Conference12th International Conference on Applications of Statistics and Probability in Civil Engineering
Number12
CountryCanada
CityVancouver
Period12/07/201515/07/2015
Series12th International Conference on Applications of Statistics and Probability in Civil Engineering, Icasp 2015

Keywords

  • Civil and Structural Engineering
  • Statistics and Probability
  • Cost reduction
  • Costs
  • Electric machine control
  • Machine components
  • Probability
  • Reliability
  • Reliability analysis
  • Safety factor
  • Shafts (machine components)
  • Uncertainty analysis
  • Wind power
  • Wind turbines
  • Civil engineering structures
  • Onshore wind turbine
  • Partial safety factor
  • Probabilistic design
  • Probability of failure
  • Reliability assessments
  • Site-specific information
  • Structural component
  • Turbine components

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