The implementation of the “One Belt, One Road” strategy and the rapid development of high-speed railway construction have injected strong transportation power into the Chinese economy. The rail transit power supply system is the core component of high-speed railway. It is responsible for the supply and transmission of all electrical energy required for operation. This is an important guarantee for the safe and reliable operation of rail transit.

The rapid development of information technology, network and intelligent technology has put forward increasingly higher requirements for rail transit power supply system.

Road traffic solutions:

• Maintenance-free intelligent solution for uninhabited areas: The new intelligent integrated control and protection unit provides uninterrupted power supply and signal transmission through special railway box replacement and maintenance-free switch cabinets, realizing an unattended intelligent power supply system. Ensure the stability and reliability of electrical equipment and the safe operation of railways.

• Multi-tunnel power distribution plan in mountainous areas: A tunnel-specific box design combined with a longitudinal split design combines the monitoring device with the power line fault automatic clearing system and the low-voltage switch control part to effectively solve the tunnel's humidity and space. The narrow transportation makes transportation and installation difficult, and the ventilation system, lighting system and power supply system in the tunnel are stable.

• Communication signal system power distribution plan: Based on the characteristics of communication signal equipment with low power consumption and high number of switches, the automatic blocking and power-on system design is realized, and real-time monitoring can be analyzed. High-voltage line signal power supply and fault analysis, automatically cutting off power failure to ensure high reliability requirements of railway signal power. It is widely used for the electrification of existing railway lines and the power supply of ordinary railway communication signaling systems.