DEVICE FOR DETERMINING VALVE OPENING DEGREE OF COOLING AIR ADJUSTMENT VALVE, DISK CAVITY TARGET TEMPERATURE DETERMINING DEVICE, AND DISK CAVITY TEMPERATURE CONTROL DEVICE

摘要

This valve opening degree determining device determines the valve opening degree of a cooling air adjustment valve for controlling the supply of cooling air to a disk cavity, the valve opening degree determining device being provided with: a target operation state acquisition unit that acquires a target operation state which is the operation state of a gas turbine prior to control; and a valve opening degree calculation unit that calculates the valve opening degree of the cooling air adjustment valve on the basis of the target operation state so that the temperature of the disk cavity is no higher than a target temperature after control. On the basis of a prediction model created on the basis of a plurality of pieces of past data associated with the relationship between operation states acquired in the past, the disk cavity temperature, and the actual opening degree of the cooling air adjustment valve, the valve opening degree calculation unit sets an input value of the valve opening degree of the cooling air adjustment valve at which the predicted value of the disk cavity temperature is no higher than the target temperature in the target operation state, as the valve opening degree of the cooling air adjustment valve.