Self-diagnosis method and system for gateway communication abnormity in distributed control system of nuclear power plant
A distributed control and self-diagnosis system technology, applied in the field of nuclear power, can solve problems such as the inability to judge the delay time of network communication, and achieve the effect of avoiding the expansion of abnormalities and failures and ensuring safety and stability
Active Publication Date: 2014-08-27
CHINA GENERAL NUCLEAR POWER OPERATION +1
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is to provide a method and system for self-diagnosis of gateway communication abnormality in the distributed control system of a nuclear power plant, which can detect Determine the length of the delay time of network communication
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[0041] figure 2 It is a flow chart of Embodiment 1 of the gateway communication abnormality self-diagnosis method in the nuclear power plant distributed control system of the present invention. The gateway communication abnormality self-diagnosis method includes:
[0042] S1. The distributed control system generates the first detection signal and transmits it to the third-party system through the gateway;
[0043] S2. The distributed control system collects a second detection signal from the third-party system, and the second detection signal is the first detection signal received by the third-party system;
[0044] S3. When the first detection signal and the second detection signal are pulse signals, the distributed control system calculates the interval between the first detection signal and the second detection signal;
[0045] S4. When the distributed control system judges that the calculated interval time is greater than a set value, an alarm signal is sent, and the set...
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The invention discloses a self-diagnosis method and system for gateway communication abnormity in a distributed control system of a nuclear power plant. The self-diagnosis method for gateway communication abnormity includes the steps that the distributed control system generates a first detection signal and transmits the detection signal to a third-party system through a gateway; the distributed control system collects a second detection signal from the third-party system, wherein the second detection signal is the first detection signal received by the third-party system; when the first detection signal and the second detection signal are pulse signals, the distributed control system calculates the interval time of the first detection signal and the second detection signal; the distributed control system sends out an alarm signal when judging that the calculated interval time is larger than a set value, wherein the set value ranges from 2 s to 3 s. By means of the technical scheme, the state and the data communication condition of the gateway are effectively and unceasingly monitored, the duration of the delay time of network communication is judged, and an alarm is immediately given for abnormity happening to the gateway.
Description
technical field [0001] The invention relates to the field of nuclear power, in particular to a method and system for self-diagnosing abnormal communication of a gateway in a distributed control system of a nuclear power plant. Background technique [0002] Nuclear power plant DCS (Distributed Control System, Distributed Control System) system (Non-safety Classification (NC) and Safety-Related (Satety-Related, SR)) and third-party systems (such as: turbine monitoring and regulation system , reactor control rod system, reactor protection or emergency shutdown system, power plant radiation monitoring system, fire detection system and LOCA (Loss Of Coolant Accident, coolant accident loss) monitoring system, etc.) data exchange generally adopts the gateway communication method. In actual engineering, the communication rate of the gateway does not remain constant. Due to the influence of factors such as communication load changes and gateway memory changes, the communication rate ...
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IPC IPC(8): G05B23/02
Inventor 周红清韩毅李东郭明鑫张立国陈永伟陈毓犹代伦
Owner CHINA GENERAL NUCLEAR POWER OPERATION