Control method and system of neutral section passing of multi-locomotive short broke trains

A control method of neutral section passing of multi-locomotive short broke trains, the method comprising:

• collecting, with a neutral section passing device of a primary multiple unit, a neutral section passing instruction signal, and sending the neutral section passing instruction signal to a controller of the primary multiple unit and a controller of a secondary multiple unit, wherein the neutral section passing instruction signal comprises a neutral section passing start signal and a neutral section passing end signal;
• in response to the neutral section passing start signal, controlling, with the controller of the primary multiple unit, the primary multiple unit to unload a traction force and turn off a main breaker, and controlling, with the controller of the secondary multiple unit, the secondary multiple unit to unload the traction force, turn off the main breaker and lower a pantograph;
• controlling, with the controller of the primary multiple unit, the primary multiple unit to turn on the main breaker according to the neutral section passing end signal;
• obtaining, with the controller of the primary multiple unit, a current speed signal of the multiple unit, and starting to calculate a distance traveled by the train in real time;
• when the distance traveled by the train is longer than the length of a neutral zone, sending, with the controller of the primary multiple unit, a primary multiple unit neutral section passing completion command to the secondary multiple unit;
• and
• controlling, with the controller of the secondary multiple unit, the secondary multiple unit to raise the pantograph and turn on the main breaker according to the primary multiple unit neutral section passing completion command to complete a neutral section passing operation.