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Methods and systems for detecting deviation of a process variable from expected values

  • US 20080027677A1
  • Filed: 07/25/2006
  • Published: 01/31/2008
  • Est. Priority Date: 07/25/2006
  • Status: Active Grant
First Claim
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1. A method for facilitating detection of abnormal operation of a process in a process plant, comprising:

  • receiving process variable data associated with the process plant;

    generating predicted process variable data using a model;

    generating a difference signal based on the received process variable data and the predicted process variable data;

    detecting whether the difference signal is increasingly deviating from zero; and

    generating an indicator of significant deviation based on whether the difference signal is increasingly deviating from zero.

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