1. Train outage: The failure of train power supply system may lead to train outage and affect passengers' travel plans.
2. Voltage instability: The voltage instability caused by the fault of the train power supply system will do harm to the electrical equipment on the train and the lives and property of passengers, especially to medical equipment and other high-precision instruments.
3. Short circuit: Short circuit of train power supply system will cause serious harm to trains, tracks and passengers.
4. Congestion and traffic accidents: The failure of the train power supply system will cause the train to stop or drive slowly, which will lead to congestion and traffic accidents.