Application of vehicle-mounted UPS power supply solutions in the railway industry. my country's railways have entered the "high-speed era". The scope of application of computer interlocking systems and microcomputer automatic blocking control systems in new railway signaling technologies continues to expand. The requirements for power supply quality of these new technology systems are greatly improved compared with traditional technical systems. . Therefore, it is becoming increasingly common to use vehicle-mounted UPS power supply as its power supply guarantee. In this article, the editor will talk about the application of vehicle-mounted UPS power supply solutions in the railway industry.

　　Application of vehicle-mounted UPS power monitoring system in railways:

　　In order to ensure the reliable operation of railway trains, it is necessary to provide reliable power supply for railway power systems. At present, most domestic railway systems have used on-board UPS to provide uninterrupted power supply for electrical equipment. In order to realize the monitoring of UPS operating conditions, battery parameters, Real-time and accurate monitoring of power grid quality.

　　A railway UPS power monitoring system is designed and implemented based on the human-machine interface, uninterruptible power supply UPS, ACR harmonic instrument, and battery module. The system can collect and display the input parameters, output parameters, and bypass parameters of the vehicle-mounted UPS. Battery voltage, charge and discharge current, temperature and other parameters are monitored; incoming circuit voltage, current, power, crest coefficient, imbalance data display; inverter output inverter temperature, current, inverter status display, the entire system improves It improves the power quality of the railway power grid and ensures the level of power grid monitoring and management.

　　Application solutions of vehicle-mounted UPS power supply solutions in the railway industry:

　　In order to ensure the safety of high-speed railway operation, according to the requirements of the Ministry of Railways for the signal power supply system of passenger dedicated lines, the railway department uses two vehicle-mounted UPS power supplies to provide power directly in parallel. According to the requirements, for stations with maintenance personnel on duty, the vehicle-mounted UPS is equipped with battery backup The power supply time is 30 minutes, and the UPS battery backup power supply time for stations without maintenance personnel is 2 hours.

　　This series of double-conversion online vehicle-mounted UPS can be used in areas with harsh power supply environments. It supports up to 8 units in direct parallel operation. The parallel system uses the shared UPS battery pack function to improve battery utilization efficiency and reduce installation space; and in the original Optimize the power supply scheme based on the signal power system to provide a green, energy-saving power supply system with high security and reliability for the signal system.

　　Analysis of the performance characteristics of vehicle-mounted UPS equipment used in the railway industry:

　　(1)Wide input voltage range

　　The wide input voltage range (380V/220V, -32% ~ +35%) is suitable for use in areas with harsh power supply environments. It can effectively reduce the number of discharges and losses of the vehicle-mounted UPS power supply battery, extend the battery life, and reduce the impact of battery products on the battery. The pollution of the surrounding environment also reduces users' investment in batteries.

　　(2) Shared battery function

　　In the case of parallel redundant power supply, choose the shared battery solution. Under the same discharge time conditions, the two hosts can use the parallel UPS battery pack to work. This function can fully save the user's investment in vehicle-mounted UPS power batteries. , save money on purchasing batteries, and also save investment in installation space and load-bearing. It is also very convenient and simple for system expansion.

　　(3)High power density

　　The small size of the vehicle-mounted UPS host not only reduces the materials used, but also makes it easier to dissipate heat. The influence of the temperature of the computer room is smaller, so that the power consumption of the air conditioner is relatively reduced, and the green environmental protection index of the entire computer room is improved. The high-density design can save floor space and installation space, improve flexibility, and adapt to different physical environments of the computer room.

　　(4) The whole machine has high efficiency

　　The online mode efficiency of the vehicle-mounted UPS power supply is >91%, and the efficiency in the economic operation mode can reach more than 98%, which can effectively utilize electric energy and save operating costs. In addition, due to the improvement of UPS efficiency and the reduction of heat generation, the power consumption and electricity bills of the computer room air conditioning equipment can also be saved.

　　(5) It comes standard with an output isolation transformer, which is stable and reliable, has strong overload capacity and impact resistance, isolates harmonic interference and reduces zero-ground voltage, and provides stable and reliable pure power for the load.

　　Summary: It has been used in government, subway, railway, communications, medical, industrial, electric power and other industries for many years. It has been proven through practice that NT series UPS is a product with high reliability and high availability. The vehicle-mounted UPS fully meets the national energy conservation and emission reduction requirements. and the requirements of market development trends. While saving operating costs for users, UPS operates with high safety, reliability and efficiency, ensuring that the signaling system in the era of high-speed railways is stable, reliable and operates normally without interruption.

　　The vehicle-mounted UPS power supply provides pure uninterruptible power supply for the electronic equipment in the base station. Therefore, the reliability of the UPS power supply is crucial to the normal operation of the base station and the reliable operation of the high-speed rail. In addition, in recent years, vehicle-mounted UPS has been widely used in special vehicles and communication command vehicles.

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