轨道交通AFC系统车站终端设备供电方案探讨

为提高轨道交通自动售检票(automatic fare collection,AFC)系统运营安全、降低AFC系统建设运营成本、减轻AFC系统运营维护压力,分析比较目前常见的3种AFC系统车站终端设备的供电方案,指出内置小不间断电源(uninterrupted power supply,UPS)方案存在使用条件苛刻、寿命短、运营维护量大、整体建设运营成本高且与运营实际需求不符的问题,以及集中式大UPS方案配电级数增多、故障点相应增加,一旦发生故障影响面相应增大的问题。从UPS配置集中与分散相结合的角度,提出人工售票机单独配置小UPS的方案;用理论上一次安装终生免维护的超级电容替代闸机内设置的小UPS的方案;结合“互联网+”及移动支付的快速发展趋势,精确分析在该趋势下AFC终端设备内具体模块的实际后备电源需求变化情况,提出减少非必要的模块后备用电负载、优化UPS配置的方案。所述方案为后续AFC系统建设提供参考。

Electronic Supply Scheme for Automated Fare Collection Station-Level Equipment in Urban Rail Transit

To improve the operation safety of rail transit automated fare collection(AFC)systems,reduce the construction and operation cost of AFC systems,and alleviate the pressure of AFC operation and maintenance,the power supply schemes of three common AFC station terminals are analyzed and compared.The problems existing in the scheme of built-in small uninterruptible power supplies(UPS),such as harsh service conditions,short service life,large amount of operation and maintenance,high cost of overall construction and operation,and inconformity with the actual demand of operation,are discussed.In the centralized large-UPS scheme,the number of power distribution stages increases,and the number of fault points increases accordingly.Once the fault has occurred,the influence surface is enlarged correspondingly.In this study,from the point of view of the combination of centralized and decentralized UPS configurations,it is suggested that the manual ticket-vending machine should be equipped with a small UPS separately.In theory,a scheme is proposed to replace the small UPS in the automatic gate machine(AGM)with a lifetime maintenance-free supercapacitor.Combined with the fast development trend of“Internet+”and mobile payment,the change of actual backup power demand of specific modules in AFC terminal equipment under this current is analyzed precisely.It is suggested that nonessential module backup power load be reduced and UPS configuration optimized.This scheme can be a useful reference for subsequent AFC system construction.