METHOD FOR THE CLOSED-LOOP CONTROL OF A CHEMICAL PROCESS IN AN INDUSTRIAL-SCALE CHEMICAL INSTALLATION

摘要

The present invention relates to a method for the closed-loop control of a chemical process carried out in an industrial-scale chemical installation (140), having the following steps of: - capturing process data relating to the chemical installation (140) using sensors, - transmitting the process data to a control system (110) via a field bus (100), - transmitting at least one subset of the process data from the control system (110) to a computer system (120), wherein the computer system (120) has a simulation program (128) for stationary and/or dynamic process simulation of the chemical process, a closed-loop control program (129) for implementing a closed-loop controller for the chemical process and a memory (122) for storing simulated state variables (124), - calculating the simulated state variables of the chemical process in a cyclically repeated manner from the subset of the process data (123) by means of the simulation program (128) and storing the simulated state variables (124) in the memory (122), - transmitting at least one desired value of a control variable of the chemical process to the closed-loop control program (129), - reading at least one subset of the simulated state variables (124) from the memory (122) for input to the closed-loop control program (129), - determining a manipulated variable in order to achieve the desired value (113) by means of the closed-loop control program (129) by processing the simulated state variables (124) read from the memory (122), - transmitting the calculated manipulated variable to the control system (110).