DCS system scheme for thermal power generation

DCS system, also known as distributed control system, is a multi-level computer system composed of process control level and process monitoring level, linked by a communication network. It integrates 4C technologies such as computer, communication, display (CRT), and control. Its basic idea is decentralized control, centralized operation, hierarchical management, flexible configuration, and convenient configuration.

This scheme adopts a multi ring coupling structure for the network, where a single ring composed of IES608-2F industrial Ethernet switches is used at each furnace site to form a multi ring coupling topology with the monitoring center's ring in a coupled manner. The network has the characteristics of real-time collection function, scalability, high reliability, high bandwidth, high-quality network signal transmission, and redundant backup. By adopting this networking method, each furnace not only achieves on-site redundancy, but also achieves redundancy in communication with the monitoring center. Moreover, as each furnace is connected to the monitoring center through a coupling loop, it ensures that the monitoring between each furnace does not affect each other. The on-site controller achieves redundant backup through a single loop on site; Redundant dual backups have also been adopted in the monitoring center; This makes the entire network highly redundant and the stability of the network particularly high.

Features of the Solution

• Adopting a multi ring coupled topology structure ensures high reliability of the entire network;

• On the application site, constructing multiple sub loops to improve the stability of the system;

• Line speed switching and QoS technology ensure the real-time performance of the network;

• Supports 6 10/100M RJ45 electrical ports and 4 155M SC/ST optical ports

• Super Ring proprietary technology, with a self-healing time of less than 20ms for ring network faults

• IEEE802.1Q VLAN and IEEE802.1p QoS protocols

• 802.1d/1w STP/RSTP protocol

• The IGMP Snooping multicast protocol supports efficient transmission of video stream data

• SNMP v1/v2 c/v3 Remote Network Management Protocol

• Web Server remote settings, monitoring and management functions

• Telnet protocol

• Port mirroring and link aggregation functions

• Support DHCP Client/Server and LLDP functions

• Provide port data frame statistics function

• Provide accurate real-time clock for network devices with an error of less than 5ppm/year

• Provide real-time logs of device operation to obtain real-time updates on the system's operational status

• Provide network hardware firewall function modules to effectively prevent network DoS attacks

• Redundant dual channel wide voltage range (10~55V) DC power input with strong voltage adaptability

• Ultra low power consumption, DC-DC switching power supply design

• Flexible relay alarm settings

• Industrial level 4 design, IP40 protection, corrugated high-strength metal casing, DIN rail mounting