A survey of fault detection and isolation in wind turbine drives

The momentous need for optimal operational and maintenance costs of wind energy drives can be accomplished by efficient monitoring of these systems. This allows us to detect the deterioration of the wind energy conversion system's health in early stage. As the frequent inaccessibility of the wind generators due to their positioning heights and as well as the rapid development in offshore wind farms triggering the importance of condition supervision and diagnosis of faults in wind energy conversion systems (WECS). To handle any fault occurred in the current sensor of doubly fed induction generator, a commonly used generator in wind turbines kalman filter is used to detect the sensor fault. Using the generalized observer scheme and dedicated observer scheme the detection and isolation of multiple sensor faults was explained.