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Frequency of Failures at High Wind Speeds

 

 

 

Frequency of Failures at High Wind Speeds

Data source: [WMEP 2006]

 

 

The frequency distributions of wind speeds and WT failures appear similar. Most failures were determined in the more frequent wind classes. Above 12 m/s, the frequency of failures is about twice as high as the frequency of wind classes.

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.