Plant performance evaluation apparatus, plant performance evaluation system, and plant performance evaluation method

A plant performance evaluation system comprising:

• a plant performance evaluation apparatus comprising:
• a first storage storing a first static model indicating a model of a first steady state, the first steady state indicating a state in which input and output of process units included in a plant are fixed with time;
• a second storage storing a first dynamic model indicating a model of a dynamic state, the first dynamic model including parameters with time dependence in the process units;
• a simulator configured to simulate operation in the dynamic state using the first dynamic model and based on the simulation result, to adjust the first dynamic model;
• a model converter configured to convert the adjusted first dynamic model to a second static model indicating a model of a second steady state, the second steady state indicating a state in which the input and output of the process units are fixed with time, and to store the second static model into the first storage, the first steady state indicating a steady state of the process units temporally before the second steady state;
• an operating condition equalizer configured to equalize operating conditions of the process units at the time of generation of the first static model and operating conditions of the process units at the time of generation of the second static model;
• a comparator configured to compare parameters included in equations indicating the first static model with parameters included in equations indicating the second static model, the first static model and the second static model having been equalized by the operating condition equalizer, and to output a comparison result;
• and
• a display configured to display the comparison results output from the comparator;
• a first database storing operating conditions and process values of process units included in the plant;
• and
• a second database storing modification history information of the process units.

A plant performance evaluation method using a first static model and a second static model, the first static model indicating a model of a first steady state, the first steady state indicating a state in which input and output of process units included in a plant are fixed with time, the second static model indicating a model of a second steady state, the second steady state indicating a state in which the input and output of the process units included in the plant are fixed with time, comprising:

• simulating operation in a dynamic state of a plant using a first dynamic model indicating a model of the dynamic state, the first dynamic model including parameters with time dependence in the process units, and based on the simulation result, adjusting the first dynamic model;
• converting the adjusted first dynamic model to the second static model;
• equalizing operating conditions of the process units at the time of generation of the first static model and operating conditions of the process units at the time of generation of the second static model, the first steady state indicating a steady state of the process units temporally before the second steady state;
• comparing parameters included equations indicating in the first static model with parameters included equations indicating in the second static model, the first static model and the second static model having been equalized, and outputting a comparison result;
• and
• displaying the comparison result.