Fan component temperature type fault detection method and system and wind turbine generator

The invention provides a fan component temperature type fault detection method and system and a wind turbine generator set, and belongs to the technical field of fan faults, and the method comprises the steps that the first predicted temperature of a fan component is obtained according to data of a first parameter and first historical data in a target time period; according to the data of the second parameter and the second historical data in the target time period, a second predicted temperature of the fan component is obtained; obtaining a third predicted temperature according to the first predicted temperature and the second predicted temperature; the difference between the third predicted temperature and the actual temperature of the fan component in the target time period is obtained, and a residual error is obtained; and when the residual error is larger than a preset fault threshold value, it is determined that a temperature type fault exists in the fan component. According to the method, the first pre