System and method for dual digital output card configuration in nuclear power plant

A technology of digital output and configuration system, applied in the field of nuclear power plants, can solve the problems of configuration redundancy and safety of dual digital output cards, and achieve the effect of reducing the difficulty of diagnosis and maintenance
CN104252885BActive Publication Date: 2017-11-14中广核工程有限公司 +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
中广核工程有限公司
Publication Date
2017-11-14

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Abstract

The invention relates to a nuclear power station double digital quantity output card configuration system and method, wherein the system comprises a first DO card butted with a first CPU (central processing unit), and a second card butted with a second CPU, the first DO card and the second DO card both include relay coils and touch spots, the relay coils are connected with corresponding CPU output ports to form a relay control loop, the touch spots of the first DO card and the second DO card are connected into a system output loop for on-off control, the touch spots of the first DO card and the second DO card are same, and corresponding to fail safe conditions of the system output loop. The invention also provides a nuclear power station digital reactor protection system. According to requirements of the fail safe conditions of the nuclear power station double digital quantity output card configuration system, DO cards with the corresponding type contact spot can be selected, double CPU completely parallel redundancy can be achieved; even if the two CPUs are both in fault, uncontrolled movements affecting equipment and unit safety may appear, and only a failure mode may be produced.
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Description

technical field

[0001] The invention relates to the technical field of nuclear power plants, and more specifically, relates to a nuclear power plant dual-digital output card configuration system and method, and a nuclear power plant digital reactor protection system. Background technique

[0002] With the development of digital technology, digital control system (DCS) is gradually applied in nuclear power plants. Reactor Protection System (RPS) is an important safety system in nuclear power plants. Its function is to protect the reactor, prevent the reactor from operating beyond the safety limit, and limit the consequences when the limit is accidentally exceeded. Digital RPS has extremely high reliability requirements for DCS. For this reason, its control cabinet usually adopts dual CPU active backup or parallel redundant configuration to ensure the reliability of DCS when one CPU fails.

[0003] like figure 1 As shown, China's million-kilowatt nuclear power unit model CPR...

Claims

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