Valve opening degree determination device for cooling-air adjustment valve, disk cavity target temperature determination device, and disk cavity temperature control device

A disk cavity target temperature determination device for determining a target temperature of a disk cavity temperature which is a temperature of a disk cavity of a gas turbine used for determining a valve opening degree of a cooling-air adjustment valve for controlling supply of a cooling air for cooling the disk cavity, the disk cavity target temperature determination device comprising:

• a non-transitory memory configured to store at least one program;
• and
• a hardware processor configure to execute the at least one program and control the disk cavity target temperature determination device to:
• acquire an object operating state which is an operating state of the gas turbine before control;
• calculate the target temperature, based on the object operating state;
• and
• control the valve opening degree of the cooling-air adjustment valve based on the target temperature calculated,
• wherein the disk cavity target temperature determination device is configured to determine an input value of the disk cavity temperature such that a loss-of-control probability of the gas turbine in the object operating state is equal to or lower than a predetermined probability as the target temperature, based on a classification model for obtaining the loss-of-control probability with an input value of the operating state and the input value of the disk cavity temperature, the classification model being generated based on a plurality of previous data in which controllability of the gas turbine is associated with the operating state and the disk cavity temperature previously acquired.

A disk cavity temperature control device for controlling a disk cavity temperature which is a temperature of a disk cavity of a gas turbine by controlling a valve opening degree of a cooling-air adjustment valve for controlling supply of a cooling air for cooling the disk cavity, the disk cavity temperature control device comprising:

• a non-transitory memory configured to store at least one program;
• and
• a hardware processor configure to execute the at least one program and control the disk cavity temperature control device to:
• determine a target temperature of the disk cavity temperature, based on an object operating state which is an operating state of the gas turbine before control;
• determine the valve opening degree such that the disk cavity temperature after control is equal to or lower than the target temperature, based on the object operating state;
• calculate a command opening degree to the cooling-air adjustment valve, based on a determined opening degree;
• and
• perform a first control to control the valve opening degree of the cooling-air adjustment valve based on the command opening degree calculated,
• wherein the target temperature is lower than a temperature limit of the disk cavity temperature, and
• wherein the disk cavity temperature control device is configured to control the valve opening degree of the cooling-air adjustment valve so as to be the valve opening degree determined by a valve opening degree determination device, the hardware processor being further configured to execute the at least one program and perform operations of the valve opening degree determination device comprising:
• acquire the object operating state;
• and
• calculate the valve opening degree such that the disk cavity temperature which is the temperature of the disk cavity after control is equal to or lower than a target temperature, based on the object operating state;
• and
• perform a second control to control the valve opening degree of the cooling-air adjustment valve based on the valve opening degree calculated,
• wherein the disk cavity temperature control device is configured to determine an input value of the valve opening degree such that a prediction value of the disk cavity temperature in the object operating state is equal to or lower than the target temperature as the valve opening degree, based on a prediction model for obtaining the prediction value of the disk cavity temperature with the input value of the operating state and an input value of the valve opening degree, the prediction model being generated based on a plurality of previous data in which the operating state, the disk cavity temperature, and an actual opening degree of the cooling-air adjustment valve previously acquired are associated with each other.

A disk cavity temperature control device for controlling a disk cavity temperature which is a temperature of a disk cavity of a gas turbine by controlling a valve opening degree of a cooling-air adjustment valve for controlling supply of a cooling air for cooling the disk cavity, the disk cavity temperature control device comprising:

• a non-transitory memory configured to store at least one program;
• and
• a hardware processor configure to execute the at least one program and control the disk cavity temperature control device to:
• determine a target temperature of the disk cavity temperature, based on an object operating state which is an operating state of the gas turbine before control;
• determine the valve opening degree such that the disk cavity temperature after control is equal to or lower than the target temperature, based on the object operating state;
• calculate a command opening degree to the cooling-air adjustment valve, based on a determined opening degree;
• and
• control the valve opening degree of the cooling-air adjustment valve based on the command opening degree calculated,
• wherein the disk cavity temperature control device is configured to determine a temperature determined by a disk cavity target temperature determination device as the target temperature,
• the hardware processor being further configured to execute the at least one program and perform operations of the disk cavity target temperature determination device comprising:
• acquire the object operating state;
• and
• calculate the target temperature, based on the object operating state,
• wherein the disk cavity temperature control device is configured to determine an input value of the disk cavity temperature such that a loss-of-control probability of the gas turbine in the object operating state is equal to or lower than a predetermined probability as the target temperature, based on a classification model for obtaining the loss-of-control probability with an input value of the operating state and the input value of the disk cavity temperature, the classification model being generated based on a plurality of previous data in which controllability of the gas turbine is associated with the operating state and the disk cavity temperature previously acquired.

A valve opening degree determination method implemented by a valve opening degree determination device for a cooling-air adjustment valve for determining a valve opening degree of the cooling-air adjustment valve for controlling supply of a cooling air for cooling a disk cavity of a gas turbine, the valve opening degree determination device including a non-transitory memory configured to store at least one program and a hardware processor configured to execute the at least one program and control the valve opening degree determination device to perform the valve opening degree determination method comprising:

• acquiring an object operating state which is an operating state of the gas turbine before control;
• calculating the valve opening degree such that a disk cavity temperature which is a temperature of the disk cavity after control is equal to or lower than a target temperature, based on the object operating state;
• and
• controlling the valve opening degree of the cooling-air adjustment valve based on the valve opening degree calculated,
• wherein the calculating of the valve opening degree includes determining an input value of the valve opening degree such that a prediction value of the disk cavity temperature in the object operating state is equal to or lower than the target temperature as the valve opening degree, based on a prediction model for obtaining the prediction value of the disk cavity temperature with an input value of the operating state and the input value of the valve opening degree, the prediction model being generated based on a plurality of previous data in which the operating state, the disk cavity temperature, and an actual opening degree of the cooling-air adjustment valve previously acquired are associated with each other.

A disk cavity target temperature determination method implemented by a disk cavity target temperature determination device for determining a target temperature of a disk cavity temperature which is a temperature of a disk cavity of a gas turbine used for determining a valve opening degree of a cooling-air adjustment valve for controlling supply of a cooling air for cooling the disk cavity, the disk cavity target temperature determination device including a non-transitory memory configured to store at least one program and a hardware processor configured to execute the at least one program and control the valve opening degree determination device to perform the disk cavity target temperature determination method comprising:

• acquiring an object operating state which is an operating state of the gas turbine before control;
• calculating the target temperature, based on the object operating state;
• and
• controlling the valve opening degree of the cooling-air adjustment valve based on the target temperature calculated,
• wherein the calculating of the target temperature includes determining an input value of the disk cavity temperature such that a loss-of-control probability of the gas turbine in the object operating state is equal to or lower than a predetermined probability as the target temperature, based on a classification model for obtaining the loss-of-control probability with an input value of the operating state and the input value of the disk cavity temperature, the classification model being generated based on a plurality of previous data in which controllability of the gas turbine is associated with the operating state and the disk cavity temperature previously acquired.

A non-transitory computer-readable recording medium storing a valve opening degree determination program for a cooling-air adjustment valve for determining a valve opening degree of the cooling-air adjustment valve for controlling supply of a cooling air for cooling a disk cavity of a gas turbine, the valve opening degree determination program when executed by a computer causes the computer to execute steps comprising:

• acquiring an object operating state which is an operating state of the gas turbine before control;
• calculating the valve opening degree such that a disk cavity temperature which is a temperature of the disk cavity after control is equal to or lower than a target temperature, based on the object operating state;
• and
• controlling the valve opening degree of the cooling-air adjustment valve based on the valve opening degree calculated,
• wherein the calculating of the valve opening degree determines an input value of the valve opening degree such that a prediction value of the disk cavity temperature in the object operating state is equal to or lower than the target temperature as the valve opening degree, based on a prediction model for obtaining the prediction value of the disk cavity temperature with an input value of the operating state and the input value of the valve opening degree, the prediction model being generated based on a plurality of previous data in which the operating state, the disk cavity temperature, and an actual opening degree of the cooling-air adjustment valve previously acquired are associated with each other.

A non-transitory computer-readable recording medium storing a disk cavity target temperature determination program for determining a target temperature of a disk cavity temperature which is a temperature of a disk cavity of a gas turbine used for determining a valve opening degree of a cooling-air adjustment valve for controlling supply of a cooling air for cooling the disk cavity, the disk cavity target temperature determination program when executed by a computer causes the computer to execute steps comprising:

• acquiring an object operating state which is an operating state of the gas turbine before control;
• calculating the target temperature, based on the object operating state;
• and
• controlling the valve opening degree of the cooling-air adjustment valve based on the target temperature calculated,
• wherein the calculating of the target temperature determines an input value of the disk cavity temperature such that a loss-of-control probability of the gas turbine in the object operating state is equal to or lower than a predetermined probability as the target temperature, based on a classification model for obtaining the loss-of-control probability with an input value of the operating state and the input value of the disk cavity temperature, the classification model being generated based on a plurality of previous data in which controllability of the gas turbine is associated with the operating state and the disk cavity temperature previously acquired.