Wind turbine generator yaw system, control method and device thereof and medium

The invention relates to the field of wind power generation, and discloses a wind turbine generator yaw system, a control method and device thereof and a medium, the wind turbine generator yaw system comprises a wind direction detection unit, a controller, a main communication unit, a DO communication unit and a yaw driving unit, and after the main communication unit breaks down, an instruction is sent through the DO communication unit; the wind direction detection unit is connected with the controller to obtain wind direction information and send the wind direction information to the controller so that the controller can control a yaw system of the wind turbine generator according to the wind direction information. The controller is connected with the yaw driving unit through the main communication unit and the DO communication unit, generates a yaw instruction according to the wind direction information, judges whether the main communication unit works normally or not, and sends the yaw ...