The Application of Intelligent Fuzzy inference to the Fault Diagnosis in Pitch-controlled System

The purpose of this article is to develop a new method to diagnose faults in pitch-controlled system of wind turbine. To do this, Fuzzy inference techniques combining the actual performance of wind turbine generating units and the spot workers' as well as the experts' experiences were used and a model is developed to diagnose faults in pitch-controlled system. The fuzzy theory is used to solve uncertainty inference problem through the establishment of the fault tree. The diagnostic accuracy is raised and the confirmation time of fault is improved at the same time by this method.