Power control method and device for rail traffic and traction control unit

The invention provides a power control method and device for rail traffic and a traction control unit. The power control method for the rail traffic is applied to a power source system of a whole vehicle. The power source system comprises the traction control unit and a central control unit. The power control method for the rail traffic comprises the steps that when network communication of the whole vehicle breaks down, the traction control unit directly collects a whole vehicle control signal through a rigid line; dynamic calculation is carried out according to the whole vehicle control signal, and target torque needed by the whole vehicle is obtained; and the target torque is transmitted to a drive motor to execute output. According to the power control method and device, a TCU can obtain the whole vehicle control signal, then the dynamic calculation is carried out according to the obtained whole vehicle control signal, and it is ensured that when the network breaks down, the wholevehicle can be pulled. 本申