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Economics-based coordination of advanced process control and real-time optimization

  • US 9,268,317 B2
  • Filed: 11/30/2010
  • Issued: 02/23/2016
  • Est. Priority Date: 12/02/2009
  • Status: Active Grant
First Claim
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1. A method for control and optimization of a process, comprising:

  • receiving process data and economic data corresponding to the process to be controlled;

    calculating an economic objective function based on the process data, the economic data and a nonlinear steady-state model of the process;

    deriving a non-linear approximation of the economic objective function in terms of a set of process control variables associated with the process;

    transmitting the non-linear approximation to an advanced process control module; and

    controlling the process according to the non-linear approximation and within a constraint to drive the process toward a constrained economic optimum by the advanced process control module;

    wherein the calculation of the economic objective function and the derivation of the non-linear approximation of the economic objective function are performed at a frequency lower than controlling the process according to the non-linear approximation by the advanced process control module.

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