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Age Dependent Reliability

 

 

 

Age Dependent Reliability

Data source: [WMEP 2006]

 

 

Wind turbines are generally constructed to operate for a period of 20 years. No statements can be made concerning the actual life expectancy of modern WTs as no operational experience of such length is yet available.

The figure above is taken from the WMEP claims database. This database was established between 1989 and 2006 with the help of the "Scientific Measurement and Evaluation Programme" (WMEP) as part of the "250 MW Wind" programme. During this period, 193,000 monthly energy supply reports and 64,000 reports on maintenance and repair measures for approx. 1,500 wind turbines were collected and analysed. The aim of WMEP was to collect statistically proven empirical values on the practical use of wind energy on a scale relevant to the energy industry and to evaluate them according to uniform criteria. The results of the project still represent one of the few reliable sources of information regarding the reliability of the turbines and their components.