Yaw slippage fault diagnosis system and early warning method for wind turbine generator

The invention discloses a wind turbine generator yaw slippage fault diagnosis system and an early warning method, relates to the field of wind turbine generators, and solves the problems that the yaw slippage fault judgment efficiency is low and the fault condition cannot be known in time due to the mode that yaw slippage of a wind turbine generator is judged through regular visual observation or inspection. Comprising an initial detection judgment module, a comprehensive analysis module and a blade analysis module, the initial detection judgment module is used for carrying out initial judgment on the working state of the wind turbine generator, the comprehensive analysis module is used for carrying out comprehensive analysis on the unit condition of the wind turbine generator, and the blade analysis module is used for analyzing the blade condition of the wind turbine generator. The number of the wind turbine generator corresponding to the wind wheel abnormal signal is sent to the fault warning module, the fa