A device for determining the valve opening degree of a cooling air adjustment valve, a device for determining a target temperature for a disk cavity, and a device for controlling a disk cavity temperature

摘要

The valve opening degree determining device is a valve opening degree determining device that determines a valve opening degree of a cooling air adjustment valve for controlling the supply of cooling air to a disk cavity, and acquires a target operation state that is an operation state before control of a gas turbine. A target operation state acquisition unit and a valve opening degree calculation unit that calculates a valve opening degree of the cooling air adjustment valve at which the disk cavity temperature becomes below the target temperature after control, based on the target operation state, and the valve opening degree calculation unit , Based on a predictive model created based on a plurality of past data that correlates the relationship between the operating state acquired in the past, the disk cavity temperature, and the actual opening degree of the cooling air adjustment valve, the disk cavity temperature in the target operating state The input value of the valve opening degree of the cooling air adjustment valve at which the predicted value falls below the target temperature is taken as the valve opening degree of the cooling air adjustment valve.