Research on the Safe, Reliable and Low-Cost Transmission of Multiple Signals between Different Control Systems
Abstract
With the gradual development of smart power plants and large-scale centralized control, there is a need to exchange a large number of signals between different DCS systems and between DCS and PLC systems. Different control systems have different brands and cannot communicate directly via networks. Moreover, due to network security concerns, the main control of unit units and the auxiliary control system of the entire plant cannot communicate directly via networks either. The commonly adopted methods for signal exchange between control systems are hardwiring and 485 communications. Both have obvious drawbacks, where hardwiring requires a large number of channels and cable laying; 485 configuration is difficult, not easy to maintain, and faults are hard to locate. This paper studies how to strike a balance between the two, using a minimal amount of hardwiring to transmit a large number of signals, which is safe, reliable, cost-effective, and can be maintained by any control personnel without network security risks.
References
National Technical Committee for Standardization of Power Plant Process Monitoring and Information (TC 376), 2024, Acceptance Guidelines for Distributed Control Systems in Thermal Power Plants: GB/T 30372-2024, China Standards Press.
General Technical Conditions for Power System Security and Stability Control Systems: DL/T 1092–2008, 2008.
Lian S, 2020, Analysis and Handling of Common Faults in XDC800B Distributed Control System. Boiler Manufacturing, 2020(6): 59–61.
Liu Y, Huang T, Zhang Z, et al., 2025, Research on the Implementation Quality Evaluation Index System of the “Power System Security and Stability Guidelines”. Standard Science, 2025(S2): 209–214.
Maintenance and Operation Regulations for Thermal Automation Systems in Thermal Power Plants: DL/T 774-2004, 2004.
He P, 2025, Research on Power Supply Reliability Optimization of Thermal Control Systems in Thermal Power Plants. China Plant Engineering, 2025(15): 131–133.
Gu H, Zhu X, 2025, Research on Reliability and Optimization of Thermal Control Systems in Thermal Power Plants. Electronic Components and Information Technology, 9(4): 123–126.
Yin W, 2024, Protection Functions and Reliability Assurance in the Intelligentization Process of Thermal Control Systems. Zhangjiang Science Review, 2024(8): 117–119.
Peng F, Tian L, Zhou X, et al., 2001, Comparative Analysis of Performance of Power Grid Protection and Control Signal Transmission Channels. Central China Electric Power, 2001(6): 64–66.
Chen W, Lou S, Wang B, 2025, A Method for Improving Data Acquisition Accuracy. Computer Measurement & Control, 33(10): 259–265.
Li M, Qin Z, 2025, Design and Implementation of Automatic Test System for DCS Industrial Control Cards. Electric Engineering, 2025(16): 1–3.
Du G, 2025, Design and Implementation of High-Precision Universal Analog Input Remote IO Module. Fluid Measurement and Control, 6(4): 72–76.
