15/12/2025
The rail transit power supply system is a highly reliable energy network specifically constructed for rail transit. Through redundant designs such as multiple power sources, the N-1 criterion, and dual-ring network power supply, the system ensures absolute continuity of power supply. To meet complex operational demands, it adopts a hybrid AC/DC and multi-voltage level architecture, which can handle the impact loads caused by train starts and stops, thereby providing stable electrical energy for all loads, including traction and power lighting. Through the Power Supervisory Control and Data Acquisition (PSCADA) system, control and data acquisition of the traction grid system are achieved, monitoring the operational status of power supply equipment, and promptly identifying and handling various faults and alarms in the power supply system to ensure its reliability and safety. As a relatively independent "isolated grid," the rail transit power supply system, under stringent safety guarantees, ultimately forms a complex energy supply system capable of supporting the safe and high-density operation of rail transit.
