Abstract
The number of wind turbines and their complexity have both increased in recent years. Maintaining a high level of reliability for wind turbines as systems has become gradually significantly more challenging. At the same time, maintenance costs have risen due to the size and complexity of wind turbines even at subcomponent level. The most important faults in wind turbines are those that result in the highest downtime and loss of productivity. There are some studies that have considered specific faults affecting wind turbine operation. However, they depend on the wind turbine model considered, the geographic and environmental changes, etc. This chapter presents a research overview of the main faults commonly affecting industrial wind turbines based on the state of the art together with a systematic analysis. A fault tree has been developed to synthesise all faults of interest and evaluate qualitatively the condition of the wind turbine system. The fault tree has been studied quantitatively via binary decision diagrams. The approach presented in this chapter is a useful study to be implemented in any condition monitoring system in order to support the maintenance management of wind turbines.
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