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Signal control system for Tianjin subway

業種 交通
関連製品 EDS-505A/508A シリーズ
IMC-101 シリーズ
概要 The Tianjin Subway No. 1 from Liuyuan to Shuanglin, has a total length of just over 26 km, which includes a 14 km stretch underground. The subway has 22 stations, 13 of which are underground, with one train-distribution center, one train storage area, and a distribution control center. The course from Liuyuan to Shuanglin is the stretch to the North and the South. The Subway No. 1 is divided into three sections. One section links Liuyuan to the West Station, another newly-built section goes Xinhuan Road to Shuanglin, and the original section goes from the West Station to Xinhua Road.
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プロジェクト紹介


The Tienjing Subway No. 1 from Liuyuan to Shuanglin, has a total length of just over 26 km, which includes a 14 km stretch underground. The subway has 22 stations, 13 of which are underground, with one train-distribution center, one train storage area, and a distribution control center. The course from Liuyuan to Shuanglin is the stretch to the North and the South. The Subway No. 1 is divided into three sections. One section links Liuyuan to the West Station, another newly-built section goes Xinhuan Road to Shuanglin, and the original section goes from the West Station to Xinhua Road.


As Subway No.1 expanded, engineers wanted a scalable network infrastructure that covered a large geographic area and could provide the most cost-effective performance to support all data acquisition, communications, and monitoring needs well into the future.


System Description

The trains use 750 VDC third-track power. To get an idea of the complexity of the system, note that there are 4 bulk substations, 6 propulsion power substations, and 3 voltage-reduction substations, with signals transmitted by an ATP, ATS system. The trains are domestically manufactured with DC voltage powered. A total of 156 cars in 26 trains serve 48,100 passengers each hour, but the average waiting time is only 2 minutes between shuttles.


A subway system has many different sub-systems, including Environment Monitoring Control System (EMCS), Fire Alarm System (FAS), Fire Extinguisher System (FES), Supervisory Control And Data Acquisition (SCADA) system, Automatic Fair Collection (AFC) system, and Distributed Supervisory System (DSS). The DSS is the most important sub-system. The core of the DSS is the signal communication system for the entire Subway No. 1. The reliability, security, stability, and response time affects the safety of the railway.


The signal collection devices use equipment from Westinghouse, which is well known around the world for providing reliable and stable devices. Eight of the twenty two stations in the subway line are equipped with signal collection devices, and four of these eight stations have two signal communication devices. The signal collection and communication devices are used for signal and data collection and on-site control, respectively. These devices must be extremely reliable and connect to a safe and reliable network system to maintain an effective communication status. In addition, the system needs network devices with a wide bandwidth to achieve efficient communication and immediacy when collecting signals for distribution. The Moxa EDS-508-SS-SC industrial Ethernet switch is chosen to handle network communication for this project. With media redundancy, a high MTBF, and the benefit of using single mode fiber, the Moxa EDS-508-SS-SC fulfills the system's performance requirements. In particular, the network system must be highly reliable and free of interference. Moxa's Turbo Ring provides fast media redundancy and the optical fiber makes the communication network immune from EMI/EMC, satisfying the railway's real-time operation demands.

 

 

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