The rail transit industry is one of the basic industries in my country, and it is also a strategic emerging industry that is highly valued by the state and supported by key industrial policies. In the first year of the "14th Five-Year Plan", the China Urban Rail Transit Association proposed four major development points for domestic urban rail transit to promote the development of smart urban rail. At the same time, the "14th Five-Year Plan" and the draft outline of the 2035 long-term goals also mentioned that during the "14th Five-Year Plan" period, the operational mileage of urban rail transit in my country will increase by 3,000 kilometers, and the cumulative passenger volume is expected to exceed 100 billion. The investment is expected to reach 1,818.8 billion yuan.
The denser and denser the line network is, the faster the operation speed is, and the high requirements for rail transit such as convenience and smoothness, economical efficiency, safety and reliability, green intensiveness, and advanced intelligence are put forward. new topic. In this context, the rail transit power system must be safe and stable to ensure continuous and reliable operation, so as to promote the development of rail transit operations in the direction of high efficiency, intelligence and energy saving.
The urban rail transit power supply system mainly includes subsystems such as communication, signal, and comprehensive monitoring. It undertakes the important tasks of environmental monitoring and information transmission for passenger transportation. It requires extremely high reliability to ensure the quality and continuity of power supply. In the construction of rail transit system, centralized power supply, distributed power supply or a combination of the two are generally used to supply power to each system.
Centralized power supply: using a centralized large-scale UPS power supply solution, you can choose 1+1 parallel redundancy/1+1 dual-bus redundancy/modular N+X redundant UPS system, which unifies UPS equipment management and greatly improves UPS The power utilization rate can be effectively reduced, and the failure rate can be effectively reduced; a time-sharing power-off distribution system can also be set up, and the corresponding "time-sharing and automatic unloading" operations can be performed according to the importance of various loads.
Distributed power supply: Use multiple low-power UPS with different subsystem loads, such as communication system, signal system, etc., to meet the current operation and management needs of different branch racks of the same system, and operate in an orderly manner without interfering with each other. UPS is the most widely used and core power protection product in the functional system of the road transportation industry. Due to the diversification and complexity of application scenarios, it often faces many challenges such as safety, adaptability to harsh environments, and green energy saving. UPS uninterruptible power supply products take into account the design of safety, reliability, environmental protection and maintainability, and meet the special needs of UPS applications in the rail transit industry. ensure system security.
