Wind turbine generator safety protection method and system and storage medium

The invention provides a wind turbine generator safety protection method and system and a storage medium. The wind turbine generator safety protection method comprises the steps that torque values of three shaft variable pitch motors of a fan are collected in real time; judging whether the torque is abnormal or not according to a torque peak value in a selected detection period when the fan state is in a rotating speed increasing to operation stage, giving an alarm if the torque is abnormal, and executing protection shutdown; and in all states of the fan, whether the variable pitch torque is seriously abnormal or not is judged according to the deviation value of the torque values of the three-shaft variable pitch motor in real time, and emergency shutdown is executed if the variable pitch torque is seriously abnormal. By monitoring the torque of the variable-pitch motor, whether the blade root load is abnormal or not during long-term or short-term operation can be effectively judged, faults are reported, a sh