Urban rail transit integrated monitoring system: hereinafter referred to as "integrated monitoring system".
1. Definition of Integrated Monitoring System
Indispensable in the subway industry. Have the following elements:
1.1 SCADA system used in rail transit industry;
1.2 Composed of general-purpose computers, network equipment and large-scale SCADA software platforms, it is an open system that supports application and integrated development;
1.3 A large-scale hierarchical distributed system covering all operating sites (control centers, stations, vehicle bases);
1.4 Interact information with various professional automation systems through open interfaces, and build a real-time information sharing platform system for line operations;
1.5 A system that realizes the monitoring of fixed electromechanical equipment, remote dispatching and coordination and dispatching of various specialties.
2. Structure of integrated monitoring system
2.1 Hardware composition
Center-level ISCS hardware equipment:
The first layer includes redundant real-time servers, redundant historical servers, external disk arrays, various subway dispatcher workstations (such as general dispatch, electric dispatch, environmental dispatch, line dispatch, maintenance dispatch, etc.), network management workstations, black and white Network printers, color graphics printers, redundant network switches with routing functions, front-end processors (FEP), UPS, etc.
The network switch configured by the control center (OCC) realizes the interconnection of all network resources of the OCC. The selection of port quantity and bandwidth of the switch fully considers the requirements of ISCS and network communication equipment, and the network switch is directly connected to the communication transmission network.
Under normal circumstances, the dispatcher of OCC controls and monitors each integrated system through the dispatcher workstation. OCC commands are sent to each integrated system through the ISCS network.
The main function of the real-time server is to complete the collection and processing of real-time data, and send control commands such as mode, program control or point control from the OCC to the integrated systems distributed in each site.
The main function of the history server is to complete the storage, recording and management of historical data.
Station-level ISCS hardware equipment:
The second layer includes redundant real-time servers, station master workstations on duty, redundant network switches, FEP, IBP, etc.
The FEP handles all interfaces with the integrated system, and the data collected from the FEP is sent to the station server through the station switch. The station server, station master workstation on duty and FEP are connected with the network switch.
2.2 Software composition
Data interface layer + data processing layer + man-machine interface layer
2.3 Data interface layer
It is mainly used for data collection and protocol conversion, which is completed by ISCS system equipment FEP. FEP performs data exchange and protocol conversion for the monitoring subsystem connected with digital signals. At the same time, FEP is responsible for isolating the data of ISCS and the monitored object, so that Guarantee the independence of the data of each subsystem.
2.4 Data processing layer
It is used for the management of real-time data and historical data. It is mainly composed of a central server and a station server, and provides the application functions of the ISCS system through a real-time database and a relational database.
2.5 Human-machine interface layer
It is used to process the man-machine interface, and is mainly composed of an operation station. By obtaining data from the central server and the station server, the man-machine interface is displayed on the operation station to complete the monitoring operations of various ISCS systems.
2.6 Network system composition
The network system of the ISCS system is divided into three layers, namely the backbone layer, the local area layer and the field layer.
2.7 Backbone layer
It is mainly used for the interconnection between the control center and the local area networks of various stations, depots and parking lots.
All stations, depots, parking lots, and control centers are equipped with dual redundant Ethernet switches, which provide 100M twisted-pair Ethernet interfaces and are connected to the backbone network. The data of each station is transmitted to the control center through the backbone network, and the control center sends data to the station through the backbone network.
2.8 Local Layer
The local area network is the internal local area network of the control center, each station, parking lot, and depot.
The central level (including backup center) LAN adopts redundant switched 100/1000M Ethernet, and the station level LAN (including stations, parking lots, depots, training management, equipment management and maintenance, network management) adopts redundant switched 100M Ethernet.
2.9 Field layer
The network on the execution level of each subsystem, including BAS, PSCADA and other subsystems, is connected to the field layer by industrial control Ethernet or field bus.
3. Application of integrated monitoring system
ISCS systems are widely used in Guangzhou Metro, Beijing Metro, Shanghai Metro, Shenzhen Metro, Dongguan Metro, Changsha Metro, Chongqing Metro, etc. Other city subways or light rails are also gradually developing ISCS systems.