Failure analysis of onshore wind farms based on experimental data

In the context of of renewable energy integration, the simultaneous use of several energy sources especially, photovoltaic and wind, are recommended. The computation of Life Cycle Cost (LCC) is considered as the best way to assess the environmental and economical impact. The Life Cycle Cost of a wind turbine can be divided into six parts: design, development, manufacturing, installation, operation and decommissioning. This paper is a contribution to assess the costs of operating a wind farm of 2MW representing the stochastic part in the calculation of the LCC. A database of 5 years functioning of more than 200 wind turbines spread over 30 farms has been used to give a first estimation of the LCC of each turbine and define the variation of MTBF and MTTR. In this study, we make a focus on the most important parts of a wind turbine and propose a global schema of maintainability of wind turbines.