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Integrated expert system for identifying abnormal events in an industrial plant

  • US 8,862,250 B2
  • Filed: 05/05/2011
  • Issued: 10/14/2014
  • Est. Priority Date: 05/07/2010
  • Status: Active Grant
First Claim
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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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