Integrated expert system for identifying abnormal events in an industrial plant
First Claim
1. A method for operating an industrial plant, comprising:
- having a rule-based expert system that comprises a set of rules for evaluating the operation of a process unit in the industrial plant;
having a model-based expert system that comprises a statistical mathematical model for evaluating the operation of the process unit in the industrial plant;
applying the model-based expert system to evaluate the operation of the process unit using statistical data on the operating conditions of the process unit;
obtaining a statistical analysis result from the model-based expert system;
applying the rule-based expert system to identify a possible abnormality in the operation of the process unit using;
(a) data on the operating conditions of the process unit, and (b) the result from the model-based expert system;
sending a first message from the rule-based expert system regarding an abnormality to an operator interface;
suppressing a second message from the model-based expert system, wherein the suppressed message relates to the abnormality and is redundant to the first message; and
adjusting the operation of the process unit based on the message relating to the abnormality.
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Abstract
A computer-implemented integrated expert system for the identification of abnormal events in an industrial plant. The expert system integrates a model-based expert system with a rule-based expert system. The model-based expert system receives data on the operating conditions of a process unit in the industrial plant and calculates one or more results that determine whether the process unit is operating abnormally. The rule-based expert system also receives data on the operating conditions of the process unit and applies its rules to the process data. The rule-based expert system also applies its rules to the one or more results generated by the model-based expert system. The integrated system may also suppress any redundant messages generated by the model-based expert system.
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Citations
25 Claims
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1. A method for operating an industrial plant, comprising:
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having a rule-based expert system that comprises a set of rules for evaluating the operation of a process unit in the industrial plant; having a model-based expert system that comprises a statistical mathematical model for evaluating the operation of the process unit in the industrial plant; applying the model-based expert system to evaluate the operation of the process unit using statistical data on the operating conditions of the process unit; obtaining a statistical analysis result from the model-based expert system; applying the rule-based expert system to identify a possible abnormality in the operation of the process unit using;
(a) data on the operating conditions of the process unit, and (b) the result from the model-based expert system;sending a first message from the rule-based expert system regarding an abnormality to an operator interface; suppressing a second message from the model-based expert system, wherein the suppressed message relates to the abnormality and is redundant to the first message; and adjusting the operation of the process unit based on the message relating to the abnormality. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An industrial plant, comprising:
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a process unit; multiple sensors that sense the operating condition of the process unit; a process control system in communication with the multiple sensors; an operator interface; and a computer system that comprises; a) a rule-based expert system that comprises a set of rules for evaluating the operation of the process unit; b) a model-based expert system that comprises a statistical mathematical model for evaluating the operation of the process unit; wherein the computer system is programmed to perform steps comprising; receiving data on the operating conditions of the process unit; applying the model-based expert system to evaluate the operation of the process unit using data on the operating conditions of the process unit; obtaining a statistical analysis result from the model-based expert system; applying the rule-based expert system to identify a possible abnormality in the operation of the process unit using;
(a) data on the operating conditions of the process unit, and (b) the statistical analysis result from the model-based expert system;sending a first message from the rule-based expert system regarding an abnormality to the operator interface; and suppressing a second message from the model-based expert system, wherein the suppressed message relates to the abnormality and is redundant to the first message. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A computer system comprising:
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a) a rule-based expert system that comprises a set of rules for evaluating the operation of a process unit in an industrial plant; b) a model-based expert system that comprises a statistical mathematical model for evaluating the operation of the process unit; wherein the computer system is programmed to perform steps comprising; receiving data on the operating conditions of the process unit; applying the model-based expert system to evaluate the operation of the process unit using data on the operating conditions of the process unit; obtaining a statistical analysis result from the model-based expert system; applying the rule-based expert system to identify a possible abnormality in the operation of the process unit using;
(a) data on the operating conditions of the process unit, and (b) the result from the model-based expert system;sending a first message from the rule-based expert system regarding an abnormality to an operator interface; and suppressing a second message from the model-based expert system, wherein the suppressed message relates to the abnormality and is redundant to the first message. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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Specification