Lithium battery UPS power supply solutions for the transportation industry. Urban rail transit stations include numerous weak current equipment systems, such as communications, situation monitoring, office automation, automatic fare collection, emergency lighting and other equipment, which are important first-level loads and require high power supplies to ensure power supply quality and power supply continuity. In this case, lithium battery UPS uninterruptible power supply was introduced, replacing traditional batteries and becoming the guarantee of the traffic signal system.

　　1. Demand background for power UPS protection in the transportation industry:

　　The rapid development of modern transportation continues to require automation, informatization, and intelligence. Its monitoring, management, coordination, release, charging and other systems must meet its high-quality requirements for power protection. Transportation is one of the important industries in my country's national economy. It is not only closely related to the national economy and the implementation of its supporting policies, but also closely related to people's lives. Up to now, lithium battery UPS power supply solutions have been successfully applied in major domestic airports, railways, ports, highways and urban transportation. As the informatization progress of China's urban transportation industry accelerates, it will focus on the construction of the transportation industry and create a reliable and safe UPS power operating environment for it.

　　Improving and ensuring the quality of electricity, reducing or even eliminating the occurrence of traffic safety accidents, and ensuring the safety of people's lives and property are risks and responsibilities that every member of the transportation system must bear. In today's era of intelligent transportation, a series of safeguard measures need to be established in various fields such as data storage, sharing, application, transmission, etc., and power guarantee is the foundation. Without electricity, all safeguard measures are impossible; and lithium battery UPS Power supply is the core component of power security.

　　2. Overview of the current status of the industry

　　Expressways have high requirements for power supply reliability, and have characteristics such as a wide range of applications, multiple load types, and complex usage environments. Some require redundant power supply methods, some require adaptability to their harsh usage environments, and some use centralized power supply. Or decentralized power supply. Therefore, lithium battery UPS power supply solutions must make reasonable power distribution design plans based on actual demand conditions, such as usage environment, equipment conditions, etc.

　　Lithium battery UPS uninterruptible power supplies are mainly used in toll stations, tunnel lighting, and tunnel ventilation applications on highways. The power requirements are mostly 10-30KVA, and the delay is generally about 2-4 hours.

　　3. Lithium battery UPS solutions in the transportation industry

　　In the equipment cavern inside the tunnel, the space area is relatively limited, the humidity is high, and there is a lot of car exhaust and dust. At the same time, considering that many tunnels are located in mountainous areas, it is recommended to add a C-class lightning protector at the UPS input point. When the load is tunnel lighting and high-pressure sodium lamps with inductive ballast are used, a reactive power compensation device must be added, otherwise the power factor of the load will be very low. , causing a huge waste of UPS uninterruptible power supply power.

　　For areas with high humidity, in addition to strengthening the chassis protection and circuit board coating of the lithium battery UPS power supply itself, it is recommended that users configure a dehumidifier to ensure an ideal humidity environment in the equipment compartment and improve the reliability of the UPS power supply battery operation. Toll station equipment mainly includes: computers, printers, electric railings, lighting, monitoring, signal lights, sensing equipment, etc. Tunnel equipment mainly includes: high-voltage sodium lamps, ventilation fans, etc.

　　Based on the on-site characteristics of the highway, after a comprehensive analysis, we provide corresponding solutions for toll stations and tunnel equipment. UPS power supply uses lithium battery products for power supply.

　　Each weak current system in the subway has very high requirements for the reliability of the power supply. When the power supply is cut off, it will cause the subway to stop running and even cause personal danger, causing immeasurable losses. Therefore, the power supply integration system of each station is equipped with two sets of power supply devices (including rectifiers). , inverter, battery), load synchronization controller, intelligent control unit, etc. In order to ensure long-term safe and reliable operation, it is recommended that the maximum load capacity of lithium battery UPS is usually 60% to 80% of the rated output power of the UPS. According to relevant engineering experience, the total load of each weak current system in a typical subway station is generally about 90kVA, so the capacity of each UPS can be selected to be 120kVA. The intelligent control unit is responsible for controlling and managing the lithium battery of the UPS power supply device and uploading the monitoring information of the UPS power integrated system.

　　1. The toll station adopts dual backup power supply mode of mains power and generator:

　　Generator/mains power—input distribution cabinet with ATS—external maintenance switch—lithium battery UPS power supply—external maintenance switch—output distribution cabinet—toll station

　　2. The tunnel adopts a single-machine power supply method:

　　Mains power supply - external maintenance switch - lithium battery UPS power supply - external maintenance switch - tunnel lighting/tunnel fan

　　4. Characteristics of lithium battery UPS power supply used on highways:

　　Lithium iron phosphate battery UPS power supply adopts advanced DSP digital control technology, which effectively improves product performance and system reliability. It is perfectly compatible with lithium iron phosphate battery and achieves higher power density integration and miniaturization. The UPS is designed with the latest technology, and the overall performance is more outstanding. The rectifier adopts high-frequency pulse width modulation technology and power factor correction technology, which is highly reliable. The ultra-wide input voltage range ensures that the UPS is more adaptable to harsh power grid environments.

　　The appearance design adopts the most widely used 19-inch standard rack-mounted chassis. The rack-mounted design is only 1U in height, which is the smallest in the industry. It has a simple appearance and is easy to install. The wide voltage input range avoids frequent switching to battery power. , extend battery life and reduce battery replacement costs.

　　The successful application of lithium battery UPS in traffic signal power systems not only solves the signal power supply's demand for highly reliable, pure AC power, but also provides power outage protection for the signal power supply, providing sustainable and uninterrupted operation for high-speed and subway operations. circuit protection. The world's leading lithium battery UPS company integrates innovative technologies of digitalization, automation and intelligence to provide customized overall UPS power solutions to help the transportation industry improve efficiency and achieve green and sustainable development while ensuring public safety.

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