Plant operation support device, plant operation support method, and a program device

A plant operation support method using a plant operation support device, having a processor and memory, for predicting a concentration of components that determines quality of a product to be produced in a plant by a simulation based on measurement data obtained from a field device arranged in the plant, comprising:

• operating with said processor in parallel synchronizing with the plant and performing with said processor a simulation with obtaining the measurement data from the field device to estimate a state quantity that has not been measured in the plant;
• estimating periodically with said processor performance parameter of devices used for the estimation of the state quantity based on the measurement data obtained from the field device;
• setting beforehand with said processor a plurality of operation conditions of the plant in a case in which the plant is operated near a limit of a product specification of the product and a plurality of timings for applying each of the plurality of operation conditions, the plurality of operation conditions being setting values relating to control of the plant;
• predicting with said processor, based on the estimated state quantity, a transient state of the plant from a specific time point to a future time point by the simulation in a case in which the plurality of operation conditions that have been set beforehand are applied at the plurality of timings, the specific time point being selectable between a present time and a previous time when a previous transient state prediction is performed, a present operating state being made to be an initial state in a case in which the present time is selected, an operating state used by the previous transient state prediction being made to be an initial state in a case in which the previous time is selected;
• setting with said processor a re-setting value input by a user as at least one of the plurality of operation conditions at a timing input by the user in the middle of one processing of the transient state prediction and continuing the one processing of the transient state prediction;
• predict, by the simulation based on the estimated state quantity, a stationary state that is a final destination of an operating state of the plant in a case where the plurality of operation conditions set beforehand are applied at the plurality of timings,
• generating with said processor a trend graph that is made from time series of a prediction result of the concentration in the transient state and the stationary state;
• and
• displaying the generated trend graph and the limit of the product specification of the product in a screen.

A non-transitory computer-readable storage medium storing a program for causing a computer of a plant operation support device for predicting a concentration of components that determines quality of a product to be produced in a plant by a simulation based on measurement data obtained from a field device arranged in the plant to execute:

• operating in parallel synchronizing with the plant and performing a simulation with obtaining the measurement data from the field device to estimate a state quantity that has not been measured in the plant;
• estimating periodically performance parameter of devices used for the estimation of the state quantity based on the measurement data obtained from the field device;
• setting beforehand a plurality of operation conditions of the plant in a case in which the plant is operated near a limit of a product specification of the product and a plurality of timings for applying each of the plurality of operation conditions, the plurality of operation conditions being setting values relating to control of the plant;
• predicting, based on the estimated state quantity, a transient state of the plant from a specific time point to a future time point by a simulation in a case in which the plurality of operation conditions that have been set beforehand are applied at the plurality of timings, the specific time point being selectable between a present time and a previous time when a previous transient state prediction is performed, a present operating state being made to be an initial state in a case in which the present time is selected, an operating state used by the previous transient state prediction being made to be an initial state in a case in which the previous time is selected;
• setting a re-setting value input by a user as at least one of the plurality of operation conditions at a timing input by the user in the middle of one processing of the transient state prediction and continuing the one processing of the transient state prediction;
• predict, by the simulation based on the estimated state quantity, a stationary state that is a final destination of an operating state of the plant in a case where the plurality of operation conditions set beforehand are applied at the plurality of timings,
• generating a trend graph that is made from time series of a prediction result of the concentration in the transient state and the stationary state;
• and
• displaying the generated trend graph and the limit of the product specification of the product in a screen.