OPTIMIZATION METHOD FOR OPERATING PLANTS IN THE PRIMARY INDUSTRY

A primary industry plant (1) is used to cyclically execute a technical process again and again. The aim of the invention is to optimize the operation of the plant. In order to achieve this aim, a computer (9) calculates, on the basis of predefined reference values (R) for first target variables (Z1) of the technical process, first expected values (E1) for first actual variables (I1) of the technical process such that the first target variables (Z1) come as close as possible to the reference values (R). Subsequently, the computer provisionally selects, among many datasets (D) comprising the first and second target variables (Z1, Z2) and the first and second actual variables (I1, I2) for each individual cycle of the technical process, a number (n2) of datasets (D) in which the first actual variables (I1) are as close as possible to the first expected values (E1). The computer then calculates, on the basis of the predefined reference values (R) and the first expected values (E1), second expected values (E2) for the second actual variables (I2). From the provisionally selected datasets (D), the computer now definitively selects a predetermined second number (n2) of datasets (D) in which the first and the second actual variables (I1, I2) are as close as possible to the first and second expected values (E1, E2). On the basis of these datasets (D), the computer (9) calculates, for a cycle, which is still to be executed, of the technical process, target values (S) for the second target variables (Z2) such that the first target variables (Z1) come as close as possible to the reference values (R). The calculated target values (S) are output by the computer (9) to an operator (13) or a control device (2) of the plant (1). Una planta industrial primaria (1) se utiliza para ejecutar cíclicamente un proceso técnico una y otra vez. El objetivo de la invención es optimizar el funcionamiento de la planta. Para lograr este objetivo, una computadora (9) calcula, sobre la base de valores de referencia predefinidos (R) para las primeras variables objetivo (ZL) del proceso técnico, los primeros valores esperados (EL) para las primeras variables reales (II) del proceso técnico, de manera que las primeras variables objetivo (ZL) se acerquen lo más posible a los valores de referencia (R). Posteriormente, la computadora selecciona provisionalmente, entre muchos conjuntos de datos (D) que comprenden la primera y segunda variables objetivo (ZL, Z2) y la primera y segunda variables re