Scheme Of DCS System In Thermal Power Plant
DCS system: also known as distributed control system, it is a multi-level computer system composed of process control level and process monitoring level, with communication network as the link. It integrates 4C technologies such as computer, communication, CRT and control. Its basic idea is distributed control, centralized operation, hierarchical management, flexible configuration, high efficiency, high efficiency and so on The configuration is convenient.
In this scheme, the network adopts the structure of multi ring coupling, and the single ring composed of ies608-2f Industrial Ethernet switch is used to build the topology of multi ring coupling with the ring group of monitoring center in the way of coupling. The network has the characteristics of real-time acquisition, scalability, high reliability, high bandwidth, high-quality network signal transmission and redundant backup. By using this networking mode, the redundancy of each furnace is not only achieved on-site, but also achieved in the communication with the monitoring center. Moreover, because each furnace itself is linked with the monitoring center by coupling ring, it ensures that the monitoring of each furnace does not affect each other. The field controller realizes redundant backup through the field single loop; In the monitoring center, redundant double backup is also used; In this way, the whole network has high redundancy, and the stability of the network is particularly high.
Scheme features
Multi loop coupling topology is adopted to ensure the high reliability of the whole network;
In the application field, multiple sub loops are constructed to improve the stability of the system;
Line speed switching and QoS technology ensure the real-time performance of the network;
It supports 6-10 / 100M RJ45 ports and 4-155M SC / ST ports
Super-Ring ring network proprietary technology, ring network fault self-healing time is less than 20ms
IEEE802.1Q VLAN and IEEE802.1p QoS protocols
802.1d/1w STP / RSTP protocol
IGMP snooping multicast protocol supports efficient transmission of video stream data
SNMPv1 / V2C / V3 remote network management protocol
Web server remote setting, monitoring and management function
Telnet Protocol
Port mirroring and link aggregation
Supports DHCP client / server and lldp functions
Provide port data frame statistics function
Provide accurate network equipment real-time clock, error less than 5ppm / year
Provide real-time log of equipment operation, and know the operation status of the system in real time
Provides the network hardware firewall function module, effectively prevents the network DoS attack
Redundant dual channel wide voltage range (10 ~ 55v) DC power input, strong voltage adaptability
Ultra low power, DC-DC switching power supply design
Flexible relay alarm setting
Industrial grade 4 design, IP40 protection, corrugated high strength metal shell, DIN rail type installation