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Integrated Supervisory Control System of Rail Transit

Publish Date:2021-04-21

Scheme Background

ISCS (Integrated Supervisory Control System)

     The Integrated Supervisory Control System (ISCS) integrates the monitoring layers of several similar automation systems into a unified monitoring system platform, which realizes the information integration and sharing, integrated monitoring and operation of all integrated and interconnected systems, and provides a platform for users to realize information exchange and resource sharing.

     Rail Transit ISCS generally consists of the following sub-systems:

     ►   Building Automation System (BAS) ►   Fire Alarm System (FAS)►   Power Supervisory Control And Data Acquisition (PSCADA) ►   Access Control System (ACS)►  Platform Screen Door (PSD)

ISCS Network Requirements

      ●  ISCS network has two different networking methods: if optical transmission equipment is used as backbone network or Ethernet switch is used for standalone networking, ISCS is usually interconnected with other systems.

      ●  ISCS usually requires ring network with good reliability, real-time capability and convergence.

      ●Considering the broadcast domain control and security, it is recommended to use 3-layer networking mode for ISCS network.

Scheme Topology   ISCS 1


ISCS of Beijing Subway Fangshan Line. Integrator: NARI.

OTN transmission backbone network and 2-layer network are used, and all ISCS terminals are located in the same network segment.

Selected devices: MACH4002, MS4128.

Scheme Topology  ISCS 2


Bearing system: ISCS, BAS, PSCADA (Beijing Subway Fangshan Line)

System integrator: NARI

Software provider: NARI (domestic software)

Data transmission mode: ISCS&BAS (Dual NIC + Single IP, Layer 2); double networks must be interconnected; multicast application mode

Transmission system: OTN

Description of Scheme Value Points

 

Redundancy: Double-ring network structure with a convergence time of less than 50ms
Fault tolerance: Single-point or conditional multi-point faults will not affect the transmission of network data
Reliability: MTBF of backbone network equipment is more than 20 years, which can meet the needs of long-term stable operation
Security: The network system is protected through ACL, AGL, DoS protection, dynamic ARP spoofing attack protection and other security policies
Compatibility: IEC-62439 standardized ring network protocol and management interface are adopted to be compatible with equipment of different suppliers for joint networking
Scalability: The network is accessed in batches and by lines, and the expansion of the network system does not affect the normal communication of existing equipment
Manageability: The working status of field equipment can be displayed intuitively through graphical network management, so as to lower the difficulty of O&M management, thus realizing intelligent O&M in combination with HITE’s NMS platform.