Centralized UPS (Uninterrupted Power Supply) system for rail transit

Abstract

The invention discloses a centralized UPS (Uninterrupted Power Supply) system for rail transit, which relates to the field of UPSs and comprises a super capacitor cabinet for storing direct current electric energy for a UPS and controlling the UPS to charge and discharge a super capacitor; the UPS host cabinet comprises a UPS which is in communication connection with the super-capacitor CMS management system and is used for responding to the control signal generated by the super-capacitor CMS management system in real time; the input switch cabinet is used for accessing commercial power and inputting electric energy into the UPS host cabinet, and when the commercial power supply is normal, the UPS host cabinet charges the super capacitor and inputs the electric energy into the centralized output monitoring cabinet at the same time so as to supply power to each rail transit subsystem electrically connected with the centralized output monitoring cabinet; and when the mains supply is abnormal, the UPS host cabinet discharges the super capacitor, and the electric energy output by the super capacitor supplies power to each rail transit subsystem, so that the centralized integration of the UPS host and the storage battery in each professional power supply system is realized, and a large amount of resources are saved.

Description

technical field [0001] The invention relates to the field of UPS power supplies, in particular to a centralized UPS power supply system for rail transit. Background technique [0002] Urban rail transit stations include numerous weak current systems, such as communications, signals, comprehensive monitoring, access control, automatic ticket collection, automatic fire alarm, screen doors, emergency lighting, substation integrated automation and other rail transit subsystems. These systems belong to the first class. The load requires a highly reliable UPS power supply to ensure the quality of the power supply and the continuity of the power supply. At present, most of them adopt a decentralized power supply method, that is, each rail transit subsystem is equipped with an independent UPS power supply, each system is relatively independent, and the UPS power is small. Low-power UPS is designed to consider low-cost (especially power and control parts) factors, so the requirement...

AI Technical Summary

Problems solved by technology

[0003] The failure of any low-power UPS may affect the normal operation of the subway. The decentralized setting method cannot realize resource sharing. There are repeated configurations of equipment, low utilization rate, large footprint, and high investment cost for underground space development, which is economically unsatisfactory. At the same time, the operation department of each rail transit subsystem must be equipped with power maintenance tools and professional maintenance personnel to carry out independent power management. However, the maintenance and repair of traditional tower power frequency UPS is relatively difficult and requires after-sales service from the manufacturer. Only engineers can carry out maintenance and repairs, which also virtually increases operation and maintenance costs and waste of human resources for subway operations

In addition, although traditional lead-acid batteries have been used for decades, their short life, large size, and high maintenance costs have made it difficult to meet the requirements of rail transit applications. Centralized hardware integration of UPS host and battery, and the adoption of new energy storage in UPS applications are urgent problems to be solved

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