JP2004204841A - Gas turbine equipment and control method for generated electric power - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide gas turbine equipment with a control system and a control method for generated power capable of achieving maximum generated power while controlling exhaust temperature so as to be below an allowable temperature of the gas turbine equipment, and capable of simplifying a circuit configuration and improving processing speed. <P>SOLUTION: This gas turbine equipment comprises a turbine 1 rotated by supplying combustion gas; a generator 5 connected with the turbine 1; a PID calculating part 16 for rotational speed which controls the rotational speed so as to be almost constant by adjusting a valve opening of a fuel adjusting valve 10; a PID calculating part 17 for exhaust temperature which controls the temperature of combustion gas exhausted by adjusting the valve opening of the fuel adjusting valve 10 so as to be below a prescribed temperature; and a generated power control part 21 for controlling the generated power of the generator 5 based on an outputted value of the PID calculating part 17 for exhaust temperature and the outputted value of the PID calculating part 16 for rotational speed. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

  The present invention relates to a gas turbine device, and more particularly to a gas turbine device provided with a control system that controls generated power of a generator based on the temperature of exhaust gas to be exhausted, and a method of controlling generated power.

  In general, a gas turbine device receives a fluid, rotates a turbine, combusts a mixture of fuel and air, a fuel control valve that controls a fuel supply amount to the combustor, and supplies air to the combustor. It basically consists of an air compressor for pressure feeding. In the combustor, combustion of the air-fuel mixture generates high-temperature and high-pressure combustion gas, and the combustion gas is supplied to the turbine so that the turbine rotates at high speed.

  The gas turbine device includes a rotational speed PID calculation unit that controls the turbine at a constant rotational speed by adjusting the amount of fuel supplied to the combustor via a fuel control valve. In the rotational speed PID calculation unit, feedback control is performed to bring the current rotational speed of the turbine closer to a predetermined target rotational speed. That is, the rotation speed of the turbine is fed back to the rotation speed PID calculation unit, and the optimum fuel supply amount for minimizing the deviation between the current rotation speed and the preset target rotation speed is determined. Is calculated by The rotational speed PID calculation unit calculates the fuel supply amount based on the PID control.

  Here, the PID control will be described. The PID control is a control method for bringing the current value of the control target close to a preset target value. In the PID control, an operation amount (control output value) for reducing the deviation between the current value and the target value to zero is based on a proportional action (Proportional action), an integral action (Integral action), and a derivative action (Derivative action). The first letter of each is taken as "PID" control. According to the PID control, a control operation combining a proportional operation according to the magnitude of the deviation, an integration operation according to the duration of the deviation, and a differential operation according to the variation of the deviation can be performed.

  Generally, when starting up a gas turbine device, a large amount of fuel is supplied in an attempt to quickly raise the turbine to a rated rotation speed, so that the air-fuel mixture burns violently. Since the combustion gas directly affects the temperature of the gas turbine device, particularly the temperature of the combustor and the regenerator (heat exchanger) installed near the exhaust port, the gas turbine device becomes excessively hot at startup. There is a possibility that it will. For this reason, the gas turbine device is provided with an exhaust temperature PID calculation unit that controls the fuel supply amount so that the temperature of the exhaust gas to be exhausted (hereinafter, appropriately referred to as the exhaust temperature) changes below a predetermined temperature. . The exhaust temperature PID calculation unit operates between the time when the air-fuel mixture ignites and the time when the mixture reaches the rated rotation.

  As this gas turbine device, there is a gas turbine device which attaches a generator to a rotating shaft of a turbine and drives the generator by the turbine to generate power. Generally, when the power generated by the generator is increased, the fuel supply amount is increased, and accordingly, the temperature of the gas turbine device is increased. Therefore, it is necessary to control the power generated by the generator so that the gas turbine device does not become excessively hot. Since the control of the generated power is conventionally performed using a dedicated control logic, there has been a problem that the circuit configuration of the entire control system must be complicated.

  The present invention has been made in view of the above-described conventional problems, and it is possible to obtain the maximum generated power while suppressing the exhaust gas temperature below the allowable temperature of the gas turbine device, and simplify the circuit configuration. It is an object of the present invention to provide a gas turbine device provided with a control system capable of improving a processing speed and a method for controlling generated power.

  In order to solve the above-described conventional problems, the present invention provides a turbine that is rotated by supplying combustion gas, a generator connected to the turbine, and a fuel control that is configured to be able to change an opening. A valve, a first calculation unit for controlling the rotation speed of the turbine to be substantially constant by adjusting the valve opening of the fuel control valve, and exhausting by adjusting the valve opening of the fuel control valve. A second calculation unit that controls the temperature of the combustion gas to be equal to or lower than a predetermined temperature; and a power generation control unit that controls the power generation of the generator based on the temperature of the exhausted combustion gas. And

  According to the present invention configured as described above, it is possible to generate the maximum generated power while suppressing the exhaust gas temperature below the temperature allowable by the gas turbine device. In addition, by diverting the output value of the second arithmetic unit to the generated power control unit, the configuration of the entire control system can be simplified and the processing speed can be improved.

  According to the present invention, generated power can be generated while suppressing an excessive rise in temperature of the gas turbine device. Further, by diverting the output value of the second arithmetic unit to the generated power control unit, the configuration of the entire control system can be simplified, and the processing speed of the entire control system can be increased.

Hereinafter, an embodiment of a gas turbine device according to the present invention will be described with reference to the drawings.
FIG. 1 is a schematic diagram showing the entire configuration of the gas turbine device according to the first embodiment.

  As shown in FIG. 1, the gas turbine device includes a turbine 1, a combustor 2 that burns a mixture of fuel and air, a fuel control valve 10 that controls a fuel supply amount to the combustor 2, And an air compressor 3 for pumping air to the vessel 2. The gas turbine device includes a generator 5 connected to the turbine 1 and a turbine control unit 12 that controls the turbine 1.

  The turbine 1 is arranged inside a casing (not shown) and fixed to a rotating shaft 6. The rotating shaft 6 is rotatably supported by a bearing (not shown), and the rotating shaft 6 and the turbine 1 rotate integrally. The air compressor 3 is configured to be driven by the turbine 1 via the rotating shaft 6 to compress air. The air compressor 3 is connected to the combustor 2 via a pipe 7, and the air compressed by the air compressor 3 is supplied to the combustor 2 through the pipe 7. Further, a heat exchanger 4 for heating air passing through the pipe 7 using heat of the combustion gas is disposed in the middle of the pipe 7.

  The fuel control valve 10 is disposed on a pipe 9 connecting a fuel supply source (not shown) and the combustor 2. The fuel supplied from the fuel supply source is supplied to the combustor 2 via the pipe 9 and the fuel control valve 10. The opening of the fuel control valve 10 is configured to be variable, and the amount of fuel supplied to the combustor 2 is adjusted by operating the fuel control valve 10.

  The fuel and air supplied to the combustor 2 form an air-fuel mixture, and the air-fuel mixture burns in the combustor 2 to generate high-temperature, high-pressure combustion gas. The combustion gas is supplied to the turbine 1 so that the turbine 1 rotates at a high speed. The combustion gas supplied to the turbine 1 is exhausted after being supplied to the heat exchanger 4 via the pipe 8.

  A generator 5 is connected near the end of the rotating shaft 6, and power is generated by the generator 1 being driven to rotate at high speed by the turbine 1 via the rotating shaft 6. An inverter 25 is connected to the generator 5, and the AC power generated by the generator 5 is transmitted to the commercial power system via the inverter 25. The generated power control unit 21 is configured to transmit a power generation command value for instructing power to be generated to the inverter 25, and control the generated power transmitted by the generator 5 via the inverter 25. I have. The AC power generated by the generator 5 is converted into required DC power by a DC converter, a booster, and the like (not shown), and is output by the inverter 25 as AC power interconnected to a commercial power supply system. In this embodiment, a DC brushless generator is used as the generator 5.

  The pipe 8 is provided with an exhaust gas temperature measurement unit 13 for measuring the temperature of the exhaust gas (exhaust gas temperature). A rotation speed measuring unit 14 for measuring the rotation speed of the turbine 1 is provided near the end of the rotating shaft 6. Each measurement value measured by the exhaust gas temperature measurement unit 13 and the rotation speed measurement unit 14 is sent to the turbine control unit 12.

FIG. 2 is a schematic diagram illustrating a configuration of the turbine control unit according to the present embodiment.
As shown in FIG. 2, the turbine control unit 12 includes a rotation speed PID calculation unit 16 as a first calculation unit, an exhaust temperature PID calculation unit 17 as a second calculation unit, and a selector (low signal select). And 18). The rotation speed PID calculation unit 16 calculates an optimum fuel supply amount based on a feedback value from the rotation speed measurement unit 14 so that the turbine 1 rotates at a preset target rotation speed. . More specifically, the rotational speed measuring unit 14 is connected to the rotational speed PID calculating unit 16, and the current rotational speed of the turbine 1 measured by the rotational speed measuring unit 14 is transmitted to the rotational speed PID calculating unit 16. Feedback is always provided. Further, in the rotational speed PID calculation unit 16, a rated rotational speed to be targeted by the turbine 1, that is, a target rotational speed is set in advance. An optimum fuel supply amount for minimizing a deviation between the target rotation speed and the current rotation speed of the turbine 1 is calculated by the rotation speed PID calculation unit 16.

  In the exhaust temperature PID calculation unit 17, a protection temperature that can be thermally permitted by the combustor 2 or the like is set in advance. This protection temperature is set to a temperature lower than the maximum temperature that the combustor 2 or the heat exchanger 4 can thermally accept. The optimum fuel supply amount is calculated by the exhaust temperature PID calculation unit 17 so that the exhaust temperature changes at the protection temperature. More specifically, an exhaust temperature measuring unit 13 is connected to the exhaust temperature PID calculating unit 17, and the current exhaust temperature measured by the exhaust temperature measuring unit 13 is constantly fed back to the exhaust temperature PID calculating unit 17. It has become so. The above-mentioned protection temperature is preset in the exhaust temperature PID calculation unit 17 as a target temperature. The optimum fuel supply amount for minimizing the deviation between the protection temperature and the current exhaust temperature is calculated by the exhaust temperature PID calculation unit 17. According to the exhaust temperature PID calculation unit 17, the temperature of the exhaust gas to be exhausted, that is, the exhaust temperature can be changed at the protection temperature, and the temperature of the combustor 2 and the like is prevented from becoming excessively high. be able to.

  The output values of the PID calculation units 16 and 17 are sent to the selector 18 respectively. The selector 18 is configured to compare the output values of the PID operation units 16 and 17 and to pass only the smallest output value. The output value that has passed through the selector 18 is sent to the fuel control valve 10 as the final output value of the turbine controller 12. Then, the fuel control valve 10 is operated so as to have a valve opening corresponding to the output value, whereby the amount of fuel to be supplied to the combustor 2 is determined. In addition to the above PID calculation units 16 and 17, a rotation acceleration PID calculation unit (not shown) for controlling the rotation acceleration of the turbine 1 is provided, and cooperates with the exhaust temperature PID calculation unit at startup. Then, the turbine is accelerated while keeping the exhaust gas temperature below a certain value.

FIG. 3 is a schematic diagram illustrating a configuration of the generated power control unit according to the present embodiment.
As shown in FIG. 3, the generated power control unit 21 includes a first subtraction unit 22 that subtracts the output value of the exhaust temperature PID calculation unit 17 from the output value of the rotation speed PID calculation unit 16, and a first subtraction. A numerical conversion unit for multiplying the calculated value of the unit by a predetermined coefficient; and a second subtraction unit for subtracting the calculated value of the numerical conversion unit from a predetermined reference power generation command value. .

  The first subtractor 22 includes an output value a of the selector 18 (an output value of the rotational speed PID calculator 16 or an output value of the exhaust temperature PID calculator 17) a and an output value b of the exhaust temperature PID calculator 17 Is sent. Then, the first subtraction unit 22 subtracts the output value b of the exhaust temperature PID calculation unit 17 from the output value a of the selector 18 (first subtraction step ab). Next, the calculated value (ab) of the first subtraction unit 22 is sent to the numerical value conversion unit 23, and is multiplied by a predetermined coefficient c in the numerical value conversion unit 23 (numeric value conversion step (ab) × c). Subsequently, the value calculated by the numerical conversion unit 23 is sent to the second subtraction unit 24. In the second subtraction unit 24, a reference power generation command value (S) is set in advance, and the value calculated by the numerical value conversion unit 23 is subtracted from the reference power generation command value (S) (second subtraction process S- ( ab) × c).

  Here, the output value of the exhaust temperature PID calculation unit 17 and the output value of the rotation speed PID calculation unit 16 are both expressed as percentages (%). On the other hand, since the generated power control unit 21 is provided to control the generated power of the generator 5, the power generation command value output from the generated power control unit 21 is a unit of the generated power, that is, the kilowatt. (KW). Therefore, in order to use the output value of the exhaust temperature PID calculation unit 17 and the output value of the rotation speed PID calculation unit 16 for controlling the power generated by the generator 5, it is necessary to convert the output value to a value corresponding to kilowatts (kW). There is. The numerical value conversion unit 23 converts the value into a value corresponding to the power generation command value to be obtained by multiplying by a predetermined coefficient suitable for performing this conversion.

  The power generation command value (kW) output from the generated power control unit 21 is sent to the inverter 25. Then, the generated power from the generator 5 is converted by the inverter 25 into power corresponding to the power generation command value. In this manner, the generated power control unit 21 controls the generated power of the generator 5 via the inverter 25.

Next, the operation of the generated power control unit 21 according to the present embodiment will be specifically described.
When the load increases and the exhaust temperature rises while the turbine 1 is rotating at the rated rotation speed, the exhaust temperature PID calculation unit 17 attempts to reduce the fuel supply amount to suppress the temperature increase. The output value b of the temperature PID calculation unit 17 decreases. On the other hand, the output value “a” of the rotation speed PID calculation unit 16 changes substantially as it is because the rotation speed is kept constant. Then, the calculated value (ab) of the first subtraction unit 22 increases as compared to before the exhaust temperature increases. Therefore, the amount subtracted from the reference power generation command value (S) in the second subtraction unit 24 increases, and the output value (power generation command value) of the generated power control unit 21 that is finally output decreases. As a result, the power generated by the generator 5 is reduced and the torque required for the turbine 1 is also reduced, so that less fuel is provided for combustion and the exhaust gas temperature can be reduced to a predetermined temperature.

  As described above, since the generated power control unit 21 uses the exhaust temperature PID calculation unit 17 used in the turbine control unit 12, it is not necessary to provide a dedicated PID calculation unit or the like. Therefore, the configuration of the entire control system including the turbine control unit 12 and the generated power control unit 21 can be simplified, and the load of arithmetic processing can be significantly reduced.

  Although the rotation speed calculation unit 16 and the exhaust gas temperature calculation unit 17 in the present embodiment are PID calculation units, the present invention is not limited to this, and other means such as dead band and limit control may be used. .

  FIG. 4 is a block diagram illustrating a configuration of the turbine control unit 12 and the generated power control unit 41 according to the second embodiment of the present invention. 4, the same reference numerals are used for the same or corresponding members as in the first embodiment. As shown in FIG. 4, the turbine control unit 12 includes a software switch S <b> 1 that switches a signal output from the exhaust temperature PID calculation unit 17. The generated power control unit 41 multiplies a first subtraction unit 42 for subtracting the output value of the selector 18 from the output value of the exhaust temperature PID calculation unit 17 and a calculated value of the first subtraction unit 42 by a predetermined coefficient. It comprises a numerical converter 43 and a second subtractor 44 for subtracting the value calculated by the numerical converter 43 from the load request.

  Further, the generated power control unit 41 performs a load request signal on the basis of a comparison value between a difference between a power value taken from a commercial power supply and a predetermined minimum power value and an output measured in each gas turbine device. Is provided. Here, the intake power value means the amount of power used from the commercial power supply, and is typically the amount of current flowing from the commercial power supply to the facility or load. Further, the minimum taken power value is the minimum value of the amount of power taken from the commercial power supply, and when the taken power value is smaller than the minimum taken power value, the output of the device is reduced. The power output control unit 45 includes a comparator 46 that compares the value of the power taken from the commercial power supply with a predetermined minimum value of the taken power, and a PID operation that generates a load request signal based on the output value of the comparator 46. A part 47 is provided. Further, other load requests are also input to the generated power control unit 41. Such other load requests include an external load request requested by a device external to the device, an internal load request requested by the device itself, and a maximum output value of the generator 5 (a maximum output value that the device can output). And so on. For example, the external load request is a customer request or other request, and the internal load request is a load request set on a touch panel arranged on the front of the device. Further, the maximum output value of the generator 5 is set in advance, and cannot be changed by the operator. Also, a load request can be generated or determined based on one or more load limiting parameters or load control parameters. In such a case, the generated power control unit 41 determines which parameter controls the load. One way to determine which parameter controls the load is to select the parameter that represents the lowest load demand. In the present embodiment, the generated power control unit 41 includes a selector 48 that selects the smallest one of the load request signal from the power output control unit 45 and other load request signals.

  With such a configuration, to generate or adjust both the fuel request at the time of starting the gas turbine device and the output request of the generator 5 while the gas turbine device is connected to a commercial power supply and operated. The output value of the exhaust gas temperature measurement unit 13 can be used for the measurement.

  When the gas turbine device starts, the exhaust temperature PID calculation unit 17 cooperates with other logic circuits to directly control the fuel supply to prevent the components including the combustor 2 from being excessively heated. That is, when the gas turbine device is started, the software switch S1 of the turbine control unit 12 is set to the closed position, the signal from the exhaust gas temperature measuring unit 13 is compared with the target value in the exhaust gas temperature PID calculation unit 17, and the device is excessively operated. A signal for controlling the fuel control valve 10 to be protected from high temperatures is generated.

  When the turbine 1 reaches the normal operation speed, the exhaust temperature PID calculation unit 17 is used to control the output of the generator 5. That is, when the turbine 1 reaches the normal operation speed, a command to open the software switch S1 of the turbine control unit 12 is sent. Thus, the output signal of the comparison in the exhaust temperature PID calculation unit 17 is used to reduce the output load request as follows.

  First, in the exhaust gas temperature PID calculation unit 17, the signal from the exhaust gas temperature measurement unit 13 is compared with a target value. This target value may be a fixed value or a variable based on one or more input parameters. The target value may be the same as the target value used at the time of starting, or may be different. The difference between the output value of the exhaust temperature PID calculation unit 17 and the current request for the fuel control valve determines the amount of reduction required to keep the temperature of the components including the combustor 2 below the limit value. Note that the first subtractor 42 of the present embodiment outputs only positive values. The numerical value converter 43 multiplies the difference (positive value) by a known constant. This constant represents a conversion coefficient for converting a certain value into a required deviation in kW. Then, the second subtraction unit 44 subtracts this deviation from the load request. As described above, this load request can be generated from one or more load requests. This load request is reduced by the generated power control unit 41 before being sent to the inverter.

  As described above, both the fuel supply and the output load are controlled by the same PID calculation unit 17. In the present embodiment, the output value from the exhaust gas temperature measurement unit 13 is compared with the target value using the exhaust gas temperature PID calculation unit 17, but the present invention is not limited to this, and other means such as dead band and limit control may be used. Can also be used to make comparisons. Further, the rotation speed calculation unit 16 can use other means such as dead band and limit control.

  FIG. 5 is a block diagram illustrating a configuration of the turbine control unit 12 and the generated power control unit 51 according to the third embodiment of the present invention. In FIG. 5, the same reference numerals are used for the same or corresponding members as the first embodiment. As shown in FIG. 5, the generated power control unit 51 compares the output value of the exhaust gas temperature measurement unit 13 with a target temperature (target value) to generate a load request signal, and outputs the load request signal from the commercial power supply. A power output control unit that generates a load request signal based on a comparison value between a difference between the input power value and a predetermined minimum input power value and an output measured in each gas turbine device. That is, the power output control unit 53 generates the load request signal based on the output value of the comparator 54 and the comparator 54 that compares the value of the power taken from the commercial power supply with the predetermined minimum value of the taken power. A PID operation unit 55. Further, other load requests are also input to the generated power control unit 51. Such other load requests include an external load request, an internal load request, the maximum output value of the generator 5, and the like. The load request can be generated or determined based on one or more load limiting parameters or load control parameters. In such a case, the generated power control unit 51 determines which parameter controls the load. One way to determine which parameter controls the load is to select the parameter that represents the lowest load demand. In the present embodiment, the generated power control unit 51 includes a selector 56 that selects the smallest one of the load request signal from the power output control unit 53 and other load request signals. One or more parameters may affect the load determined by adding the deviation.

  With such a configuration, the output value of the exhaust gas temperature measurement unit 13 is compared with the target temperature (target value) by the comparator 52, and a load request signal is generated. This target value may be a fixed value or a variable based on one or more input parameters. The result of the comparison can be used to generate or regulate the output demand of the generator 5 while the gas turbine device is connected to a commercial power supply and operated. The comparator 52 can use a PID calculation unit that generates a value converted to represent a dead band that generates a digital rectangular signal, a load request, or a load request deviation. In the present embodiment, the output value from the exhaust gas temperature measurement unit 13 and the target value are compared using the exhaust gas temperature PID calculation unit 17, but the present invention is not limited to this. The comparison can also be performed using means. Further, the rotation speed calculation unit 16 can use other means such as dead band and limit control.

FIG. 1 is a schematic diagram illustrating an entire configuration of a gas turbine device according to a first embodiment of the present invention. FIG. 2 is a schematic diagram illustrating a configuration of a turbine control unit according to the first embodiment of the present invention. FIG. 2 is a schematic diagram illustrating a configuration of a turbine control unit and a generated power control unit according to the first embodiment of the present invention. FIG. 9 is a schematic diagram illustrating a configuration of a turbine control unit and a generated power control unit according to a second embodiment of the present invention. It is a mimetic diagram showing composition of a turbine control part and a generated power control part in a 3rd embodiment of the present invention.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Turbine 2 Combustor 3 Air compressor 4 Heat exchanger 5 Generator 6 Rotating shaft 7, 8, 9 Pipe 10 Fuel control valve 12 Turbine control unit 13 Exhaust temperature measuring unit 14 Rotating speed measuring unit 16 PID calculating unit for rotating speed 17 PID calculation unit for exhaust gas temperature 18 Selectors 21, 41, 51 Generated power control unit 22, 42 First subtraction unit 23, 43 Numerical conversion unit 24, 44 Second subtraction unit 25 Inverter 45, 53 Power output control unit 46 , 52, 54 Comparator 47, 55 PID operation unit 48, 56 Selector

Claims (13)

A turbine that rotates by being supplied with combustion gas,
A generator connected to the turbine,
A fuel control valve configured to change the opening,
A first calculation unit that controls the rotation speed of the turbine to be substantially constant by adjusting a valve opening of the fuel control valve;
A second calculation unit that controls the temperature of the combustion gas exhausted by adjusting the valve opening of the fuel control valve to a predetermined temperature or less;
A generated power control unit that controls generated power of the generator based on an output value of the second calculation unit and an output value of the first calculation unit;
A gas turbine device comprising: The generated power control unit,
A first subtraction unit that subtracts an output value of the second arithmetic unit from an output value of the first arithmetic unit to calculate a first calculated value;
A numerical conversion unit that multiplies the first calculated value in the first subtraction unit by a predetermined coefficient to calculate a second calculated value;
A second subtraction unit that subtracts the second calculation value in the numerical value conversion unit from a preset reference power generation command value;
The gas turbine device according to claim 1, further comprising:   The gas turbine device according to claim 2, wherein the generated power control unit includes a selector that sends one of load request signals as the reference power generation command value to the second subtraction unit. A turbine control unit that adjusts the fuel control valve;
A selector for selecting a smaller one of output values of the first arithmetic unit and the second arithmetic unit and sending the selected output value to the turbine control unit;
The gas turbine device according to any one of claims 1 to 3, further comprising: A turbine that rotates by being supplied with combustion gas,
A generator connected to the turbine,
A fuel control valve configured to change the opening,
A first calculation unit that controls the rotation speed of the turbine to be substantially constant by adjusting a valve opening of the fuel control valve;
A second calculation unit that controls the temperature of the combustion gas exhausted by adjusting the valve opening of the fuel control valve to a predetermined temperature or less;
A generated power control unit that controls the generated power of the generator based on the temperature of the exhausted combustion gas,
A gas turbine device comprising:   The gas according to claim 5, wherein the generated power control unit further includes a comparator that compares a temperature of the exhaust gas with a preset target value to generate a load request signal. Turbine equipment.   The gas turbine apparatus according to claim 6, wherein the generated power control unit further includes a selector that selects one of load request signals including a load request signal generated by the comparator.   The gas turbine device according to any one of claims 1 to 7, wherein at least one of the first arithmetic unit and the second arithmetic unit is a PID arithmetic unit.   The gas turbine device according to any one of claims 1 to 7, wherein at least one of the first calculation unit and the second calculation unit uses dead band or limit control. A method for controlling the generated power of a generator in a gas turbine device,
Supplying fuel to the combustor through a fuel control valve to generate combustion gas,
Rotating the turbine by the combustion gas,
Adjusting the amount of fuel supplied through the fuel control valve using a first calculation unit so that the rotation speed of the turbine is maintained substantially constant;
Adjusting the amount of fuel supplied through the fuel control valve by using the second calculation unit so that the temperature of the exhaust gas is maintained at a predetermined temperature or lower;
A method of controlling generated power, wherein the generated power of the generator is controlled using the second arithmetic unit.   The method according to claim 10, wherein at least one of the first calculation unit and the second calculation unit is controlled by PID control, dead band, or limit control.   The generated power of the generator according to claim 10 or 11, wherein the generated power of the generator is increased or decreased according to a difference between an output value of the first calculation unit and an output value of the second calculation unit. Control method. In the step of controlling the generated power,
Calculating a first calculated value by subtracting the output value of the second arithmetic unit from the output value of the first arithmetic unit;
Multiplying the first calculated value by a predetermined coefficient to calculate a second calculated value;
The method according to any one of claims 10 to 12, wherein the second calculated value is subtracted from a preset reference power generation command value.

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