A safety-level dcs network structure for nuclear power units

Abstract

The invention provides a safety-level DCS network structure of a nuclear power unit, which belongs to the technical field of safety protection of nuclear power plants. Including the man-machine data bus, safety bus and safety system bus that constitute the ring network, the safety level DCS of the nuclear power unit is arranged in the ring network; the arrangement position of the nodes in the man-machine data bus, the arrangement position of the nodes in the safety bus, and the safety The layout position of the nodes in the system bus satisfies: the layout nodes with multiple sub-cabinets of the same disk platform are adjacent to the layout nodes, and the layout nodes of multiple sub-cabinets with the same power supply are adjacent. It can avoid to the greatest extent that sub-cabinets with the same panel and power supply will affect other safety-level DCS equipment when the power is cut off or maintenance is off-grid; improve safety-level DCS commissioning and maintenance work efficiency, commissioning efficiency, and reduce commissioning period; reduce The scope of influence of a single control station or a single row of control cabinet shutdown maintenance improves the maintainability and reliability of the system.

Description

technical field [0001] The invention relates to the technical field of nuclear power plant safety protection, in particular to a nuclear power unit safety-level DCS network structure. Background technique [0002] As an important part of the nuclear power plant DCS system, the safety-level DCS of nuclear power units has realized the functional control of the safety-level and safety-related systems of nuclear power units. (ESFAC), specially designed safety facility automatic test cabinet (ESFAT), data transmission cabinet (DTC), digital safety-related cabinet (SRC1-3), analog safety-related cabinet (SRC4), equipment interface cabinet (CIC), stack Core cooling monitoring system (CCMS), safety control display device (SCID), safety alarm cabinet (APC), gateway (GW), post-accident monitoring system (PAMS), etc.; each functional module includes multiple sub-cabinets, all Information exchange between sub-cabinets realizes the control, display and logic processing of safety-level D...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at setting multiple functional modules in different areas, and the number of sub-cabinets is large, and the layout is not reasonable enough. When an accident occurs in a certain functional module or sub-cabinet or the power is cut off for maintenance, it will affect the data communication of the entire system. , providing a safety-level DCS network structure for nuclear power units

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