Fatigue life evaluation method, system and equipment of wind turbine generator and medium

A wind turbine generator fatigue life evaluation method, system, device and medium, comprising: performing simulation calculation based on acquired external meteorological parameters of a wind power plant and actual operation states of an in-service wind turbine generator to obtain load time sequence values of the in-service wind turbine generator in first unit duration in each wind speed interval under each operation state; on the basis of the load time sequence value of the first unit duration in each wind speed interval under each operation state of the in-service wind turbine generator, calculating by using a statistical extrapolation method to obtain a fatigue load spectrum of a calculation period; performing evaluation based on the fatigue load spectrum of the calculation period in combination with an S-N curve to obtain the residual fatigue life of the in-service wind turbine generator; according to the method, the actual operation external environment condition and the actual operation state of the wi