Abstract: It is judged whether a first predicted value of an operation index obtained by inputting a scheduled change value of a manipulation parameter of a plant meets an operation criterion, and whether a second predicted value of the operation index obtained by inputting a virtual change value with a greater change amount from a current value than the scheduled change value to a prediction model meets the operation criterion. If it is judged that the first predicted value and the second predicted value meet the operation criterion, the scheduled change value is output as a command value of the manipulation parameter.

Abstract: Provided is a prediction device that outputs a prediction value of process data in consideration of a prediction error of a prediction model. A prediction device includes a data collection unit that collects process data of a device; a prediction model construction unit that constructs a prediction model having a predetermined input variable of first process data as an input value and having a predetermined output variable as an output value, and an error calculation model which calculates a prediction error of the prediction model, based on the first process data collected by the data collection unit; and a prediction unit that outputs a prediction value which is corrected based on a prediction value of the output variable for second process data and a prediction error for the prediction value of the output variable, the prediction value being predicted based on the input variable of the second process data collected by the data collection unit, the prediction model, and the error calculation model.

Abstract: A gas turbine control method and device to restrain combustion vibration more precisely by alleviating the relationship between the composition or heat quantity of the fuel and the combustion vibration characteristic and by grasping the combustion vibration characteristic more accurately. The combustion vibration generated by a burner of the gas turbine and the composition or heat quantity and other plant status amounts of fuel supplied to the burner are detected. The combustion vibration characteristic is grasped based on the detected values. When the combustion flow rate or air flow rate supplied to the burner is increased/decreased to obtain operation condition under which no combustion vibration occurs, the detected values of the combustion vibration as well as the composition or heat quantity and other plant status amounts of the fuel are divided and stored in multiple databases corresponding to the value of the composition or heat quantity of the fuel.

Abstract: To restrain combustion vibration more precisely by alleviating the relationship between the composition or heat quantity of the fuel and the combustion vibration characteristic and by grasping the combustion vibration characteristic more accurately. The combustion vibration generated by burner of gas turbine as well as the composition or heat quantity and other plant status amounts of fuel f supplied to the burner are detected. The combustion vibration characteristic is grasped based on the detected values. When the combustion flow rate or air flow rate supplied to the burner is increased/decreased in order to obtain operation condition under which no combustion vibration occurs, the detected values of the combustion vibration as well as the composition or heat quantity and other plant status amounts of the fuel are divided and stored in multiple databases corresponding to the value of the composition or heat quantity of the fuel.