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Signal control system for subway No 1

業種 交通
関連製品 EDS-505A/508A シリーズ
概要 Subway No. 1 from Liuyuan to Shuanglin has a total length of just over 26 km, including almost 14 km underground. The subway has 23 stations, one train-distribution center, one train storage area, and a distribution control center. The trains use 750 VDC third-track power. To give you an idea of the complexity of the system, 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 domestic and DC voltage powered. With a total of 156 trains, waiting time is only 2 minutes between shuttles, while serving 48,100 passengers each hour.
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プロジェクト紹介


Subway No. 1 from Liuyuan to Shuanglin has a total length of just over 26 km, including almost 14 km underground. The subway has 23 stations, one train-distribution center, one train storage area, and a distribution control center. The trains use 750 VDC third-track power. To give you an idea of the complexity of the system, 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 domestic and DC voltage powered. With a total of 156 trains, waiting time is only 2 minutes between shuttles, while serving 48,100 passengers each hour.


A subway system has many different sub-systems, including Environment Monitoring Control System (EMCS), Fire Alarm System (FAS), Fire Extinguisher System (FES), Supervisor Control And Data Acquisition (SCADA), Automatic Fair Collection (AFC), and Distributed Supervisor System (DSS). DSS is the most important of these. The core of DSS is the link system on the railway. The reliability, security, stability, and immediacy affect railway safety.


From a technical aspect, the signal system for the railway is a computer link system, which is a combination of the mechanical link system and electrical link system (relay link system). Due to the unreliability of the computer link system, the devices must be highly reliable. In particular, the network system must have redundant and interference-free functions. What kind of network system has such functions?


System Description


The signal collection and link devices use equipment from the British company, Westinghouse. The company is well-known around the world for producing reliable and stable devices. In the subway, eight out of twenty one stations are equipped with WOC signal collection devices, and four out of these eight stations have two signal link devices. WOC and link devices are used for signal collection and on-site control, respectively. The highly reliable front-signal-link-devices must be connected in a safe and reliable network system to communicate with each other. In addition, the system needs devices with a wider bandwidth to achieve efficient communication and immediacy when collecting signals for distribution. The media redundancy, 260,000H MTBF, and 148,800 pps forwarding and filtering rate of Moxa EDS-508-SS-SC can satisfy the system's critical requirements.

 

 

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