In order to detect the fault of the gearbox safely and reliably without stopping the machine,and realize the fault-tolerant control operation of the wind turbine under the gearbox fault condition,a design scheme for fault detection and fault-tolerant control of the wind turbine gearbox was proposed based on the supervisory control and data acquisition (SCADA) data collaboration.The system model and SCADA solution framework of the wind turbine were introduced.The fault detection and health indicators of the wind turbine system were obtained through regression modeling,exception analysis and integrated learning.Then,the output power of the wind turbine was derated using fuzzy logic control,so as to achieve fault tolerant control operation of the wind turbine under gearbox fault conditions.Finally,the simulation was performed,and the results were compared with an actual 2 MW wind turbine system.The experimental results show that the fault detection and fault-tolerant control scheme can effectively realize the fault detection of the gearbox,and deration control to the output power of the wind turbine is performed with fault,so as to reduce the bearing stress of the blade and tower,and the temperature of the gear box bearing and lubricating oil are effectively reduced.