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Fault diagnosis method and system for analog input module of nuclear security level DCS

An input module and fault diagnosis technology, which is applied in general control systems, control/regulation systems, comprehensive factory control, etc., can solve the problems of tight time and heavy tasks for diagnosis tasks, and achieve both timeliness and importance, improve efficiency, Guaranteed timely response

Active Publication Date: 2021-08-10
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that in a safety-level DCS system, the modules are required to respond quickly, and the real-time requirements for fault processing are very high. The diagnostic tasks inside the modules are time-consuming and heavy. It is necessary to ensure less time-consuming and To ensure the coverage of diagnosis, the purpose is to provide a nuclear safety level DCS analog input module fault diagnosis method and system, which solves the problem of real-time diagnosis of analog input channels through fault classification and time-sharing diagnosis

Method used

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  • Fault diagnosis method and system for analog input module of nuclear security level DCS
  • Fault diagnosis method and system for analog input module of nuclear security level DCS
  • Fault diagnosis method and system for analog input module of nuclear security level DCS

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Embodiment 1

[0025] The present embodiment 1 is a kind of present embodiment 1 is a kind of nuclear safety level DCS analog quantity input module fault diagnosis method, comprises the following steps:

[0026] First, initialize the analog input module;

[0027] Secondly, the initialized analog input module is periodically functionalized according to the number of channels. The functional operation includes real-time diagnosis of the faults of the analog input module in order of fault priority, including 4 faults in sequence: serious communication Fault; CPU fault; module power failure, cycle timeout fault and minor communication fault; channel fault. According to the urgency of the fault, troubleshoot the faults of the analog input modules diagnosed respectively.

[0028] Finally, the analog input module faults are divided into serious faults and minor faults according to the urgency of the faults; serious faults include: serious communication faults and CPU faults; minor faults include: ...

Embodiment 2

[0034] Embodiment 2 is based on Embodiment 1, a nuclear safety level DCS analog input module fault diagnosis system, including:

[0035] The initialization module is used to initialize the analog input module;

[0036] The functionalized operation module is used to perform periodic functionalized operation of the initialized analog input module according to the number of channels, and the functionalized operation includes real-time diagnosis of faults of the analog input module in order of fault priority;

[0037] The fault processing module is used for processing the faults of the analog input module diagnosed according to the urgency of the faults;

[0038] Among them, the faults of the analog input module include the following 4-level faults in order of fault priority: serious communication faults; CPU faults; module power faults, cycle timeout faults and minor communication faults; channel faults.

Embodiment 3

[0040] Embodiment 3 is based on Embodiment 1, a method for real-time diagnosis of an analog input channel of a safety-level DCS system of a nuclear power plant. The method in Embodiment 3 classifies faults, and important faults are diagnosed first. In the safety-level DCS system, the module is required to respond quickly and the real-time performance of fault processing is very high. Therefore, the diagnostic tasks inside the module are time-consuming and heavy. It is necessary to ensure less time-consuming and diagnostic coverage. In this case, a real-time diagnosis method of analog input channel for fault classification and time-sharing diagnosis is proposed.

[0041] The operation of the entire analog input module is divided into three tasks, initialization task, function operation task, and fault handling task. After the module is powered on, it runs the initialization task. After the initialization is successful, it enters the function operation task, and after the functi...

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Abstract

The invention discloses a fault diagnosis method and system for an analog input module of a nuclear security level DCS. The fault diagnosis method comprises the following steps that: the analog input module is initialized; the initialized analog quantity input module is subjected to periodic functional operation according to the number of channels, and the functional operation comprises the steps that faults of the analog quantity input module are sequentially diagnosed in real time according to a fault priority sequence, and then the diagnosed faults of the analog quantity input module are processed according to fault emergency degrees. According to the method, periodic time-sharing sequential diagnosis is carried out on faults of the analog input module, the diagnosis results are processed according to emergency programs, timely response to important faults is guaranteed, all diagnoses can be covered on the basis of guaranteeing the response time of the analog input module, the fault diagnosis efficiency is effectively improved, and the fault diagnosis accuracy is improved, and the timeliness and importance of fault diagnosis are considered.

Description

technical field [0001] The invention relates to the field of safety-level DCS systems of nuclear power plants, in particular to a fault diagnosis method and system for nuclear safety-level DCS analog quantity input modules. Background technique [0002] The safety-level DCS platform is a digital control system for nuclear power plant control, and the analog input module of the safety-level DCS platform is a special module for collecting analog signals in the system. [0003] In a safety-level DCS system, the control of task time is very strict, and the response time requirements for a single module are very high. At the same time, it is necessary to respond in time when a fault is found. For a single module, the diagnostic task time is tight and needs to be covered. In this context, real-time diagnosis of analog input channels is extremely important. Contents of the invention [0004] The technical problem to be solved by the present invention is that in a safety-level DC...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/418
CPCG05B19/41845G05B2219/33273Y02P90/02
Inventor 付婷刘明星杨斌杨登叶怡荣健兵蒋维梁建周静闫昊黄奇
Owner NUCLEAR POWER INSTITUTE OF CHINA