JP2002155762A - Gas turbine generation facility and control method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas turbine generation facility and a control method therefore capable of controlling a heating value or a fuel gas of which a pressure is raised by a gas compressor of a high-pressure stage to a constant value without carrying out an output reduction and a temporary stop of the generating facility even if a feed amount of the fuel gas invaded into a gas compressor of a low-pressure stage is varied due to a stopping of a blast furnace. SOLUTION: In the gas turbine generating facility 1, a cooling substance throwing means 7 for throwing a cooling substance for cooling a fuel gas into a fuel gas of which a temperature is raised by a gas compressor 3a of a low- pressure stage or a fuel gas cooled by a cooling means 3c; and a heating value control means 10 for varying a feed amount of the fuel gas fed to the gas compressor 3a of a low-pressure stage adjusting to a thrown amount of the cooling substance thrown by the cooling substance throwing means 7 such that a heating value of the fuel gas after the cooling substance is thrown becomes constant are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas turbine power generation system having a gas turbine for driving a power generator and a control method therefor. TECHNICAL FIELD The present invention relates to a gas turbine power generation facility in which a pressure is increased by a gas compressor and a control method thereof.

[0002]

2. Description of the Related Art As this type of conventional gas turbine power generation equipment, for example, the one shown in FIG. 2 is known. As shown in FIG. 2, the gas turbine power generation equipment 101 is composed of an air compressor 102 for compressing air and a fuel gas obtained by mixing a high calorie gas such as LNG and coke oven gas and a low calorie gas such as a blast furnace gas as a main component. Low-pressure gas compressor 103a that raises the pressure of the fuel to a low pressure, an intercooler 103c that cools the fuel gas that has been raised to a low pressure by the low-pressure gas compressor 103a to a predetermined temperature with cooling water, and a fuel that is cooled by the intercooler 103c. A high-pressure gas compressor 103b for increasing the pressure of the gas to a high pressure.
The gas turbine power generation equipment 101 includes an air compressor 1.
02 and the gas compressor 103 at the high pressure stage
A combustor 104 for supplying and burning the fuel gas pressurized by b and a gas turbine 105 driven by energy of the combustion gas from the combustor 104 and driving a generator 106 are provided. Note that, in FIG.
Is a flow sensor for high calorie gas, 108 is a flow control valve for high calorie gas, 109 is a flow sensor for low calorie gas, 110 is a flow control valve for low calorie gas, 111 is a mixer, 112 is a high-pressure gas compressor A fuel gas flow rate sensor pressurized by 103b and a flow rate control valve 113 for the fuel gas.

In this gas turbine power generation facility 101, a gas compressor for increasing the pressure of a fuel gas obtained by mixing a low calorie gas and a high calorie gas is divided into a low-pressure gas compressor 103a and a high-pressure gas compressor 103b. An intercooler 103c is interposed between them to lower the temperature of the fuel gas, which has been raised to a low pressure by the gas compressor 103a of the low-pressure stage, and converts the low-temperature fuel gas to the gas compressor 1 of the high-pressure stage.
By increasing the pressure to a high pressure by 03b, compression becomes close to isothermal compression and the compression efficiency of the gas compressor can be increased.

In order to stabilize the calorific value of the fuel gas mixed by the mixer 111 and, consequently, the calorific value of the fuel gas boosted by the gas compressor 103b of the high-pressure stage, the gas compression of the low-pressure stage is performed. The supply amount of the high calorie gas in the mixed gas supplied to the blower 103a is controlled to be almost constant using the high calorie gas flow sensor 107 and the high calorie gas flow control valve 108, and the low calorie gas supply amount is also controlled. To the flow sensor 109 for low calorie gas.
And the flow rate control valve 110 for low-calorie gas was used to perform almost constant control.

[0005]

However, the conventional gas turbine power generation facility 101 has the following problems. That is, in the gas turbine power generation facility 101, the supply amount of the low-calorie gas may fluctuate largely due to a stop of the blast furnace or the like, and the required amount of the low-calorie gas may not be supplied. In this case, the calorific value of the fuel gas obtained by mixing the high-calorie gas and the low-calorie gas cannot be made constant, so that the output of the power generation equipment must be reduced.

Accordingly, the present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a fuel supply system in which a supply amount of fuel gas entering a low-pressure stage gas compressor fluctuates due to a shutdown of a blast furnace. It is an object of the present invention to provide a gas turbine power generation facility and a control method therefor that can control the calorific value of the fuel gas boosted by the gas compressor in the high pressure stage to a constant level without lowering the output of the power generation facility or temporarily stopping the power. .

[0007]

According to a first aspect of the present invention, there is provided a gas turbine power generation system comprising: an air compressor for compressing air; and a low-pressure stage for boosting fuel gas to a low pressure. A gas compressor, a cooling means for cooling the fuel gas pressurized by the low-pressure gas compressor, a high-pressure gas compressor for pressurizing the fuel gas cooled by the cooling means to a high pressure, and the air A combustor for supplying and burning the air compressed by the compressor and the fuel gas pressurized by the gas compressor at the high pressure stage, and driven by the energy of the combustion gas from the combustor to drive the generator A gas turbine power plant equipped with a gas turbine, wherein the cooling means cools the fuel gas into the fuel gas pressurized by the low-pressure stage gas compressor or into the fuel gas cooled by the cooling means. A cooling substance input means for inputting a substance, and gas compression of the low-pressure stage in accordance with the cooling substance input quantity supplied by the cooling substance input means so that the calorific value of the fuel gas after the cooling substance is input is constant. Heat quantity control means for changing the supply amount of fuel gas to be supplied to the machine. Here, the "cooling substance" cools the fuel gas, such as nitrogen gas, which is pressurized by a gas compressor of a low pressure stage or the fuel gas cooled by a cooling means, in addition to the moisture defined in claims 2 and 4. Refers to a substance.

[0008] According to this gas turbine power generation facility, the cooling substance input means inputs the cooling substance into the fuel gas pressurized by the low-pressure stage gas compressor or into the fuel gas cooled by the cooling means. . When a cooling substance is injected into the fuel gas, the fuel gas pressurized by the gas compressor of the low-pressure stage or the fuel gas cooled by the cooling means is cooled, and the temperature thereof is decreased. Of the cooling means can be reduced, and the cooling means can be downsized.

On the other hand, the calorie control means controls the gas compressor of the low-pressure stage in accordance with the amount of the cooling substance charged by the cooling substance charging means so that the amount of heat of the fuel gas after the cooling substance is charged is constant. The supply amount of the supplied fuel gas is changed.
Therefore, even if the supply amount of the fuel gas supplied to the gas compressor at the low pressure stage fluctuates due to a stop of the blast furnace or the like, the calorie control means adjusts the supply amount of the cooling material supplied by the rejection material input means. The amount of fuel gas supplied to the low-pressure stage gas compressor is changed to keep the calorific value of the fuel gas after the cooling substance is injected, and hence the calorific value of the fuel gas boosted by the high-pressure stage gas compressor. Can be constant. Therefore, the operation in the power plant can be continued without lowering the output of the power generation equipment or performing a temporary stop.

[0010] In the gas turbine power generation equipment according to claim 2 of the present invention, in the invention according to claim 1, the cooling substance input means is provided in the fuel gas pressurized by the low-pressure stage gas compressor or in the fuel gas. Moisture blowing means for blowing water into the fuel gas cooled by the cooling means, wherein the calorie control means blows the fuel gas with the water blowing means such that the calorific value of the fuel gas after the water is blown is constant. It is characterized in that the supply amount of the fuel gas to be supplied to the low-pressure stage gas compressor is changed in accordance with the amount of water blown.

[0011] According to this gas turbine power generation equipment, the water blowing means includes saturated steam, hot water, cold water, etc., in the fuel gas pressurized by the low-pressure stage gas compressor or in the fuel gas cooled by the cooling means. Water can be blown to cool the fuel gas. Since this moisture has a higher specific heat than nitrogen gas, it is possible to increase the power output by the power generation equipment. When injecting saturated steam as moisture, it is necessary to pressurize and heat hot water to generate saturated steam, but pressurizing water is easier than pressurizing nitrogen gas. Can be used.

The calorie control means is adapted to supply the fuel gas supplied to the low-pressure stage gas compressor in accordance with the amount of water blown by the water blowing means so that the amount of heat of the fuel gas after water is blown is constant. To change the supply amount. For this reason, even if the supply amount of the fuel gas entering the gas compressor of the low pressure stage fluctuates due to a stop of the blast furnace or the like, the calorie control means adjusts the gas pressure of the low pressure stage according to the amount of water blown by the water blowing means. By changing the amount of fuel gas supplied to the compressor, the calorific value of the fuel gas after moisture has been blown can be kept constant, and the calorific value of the fuel gas boosted by the high-pressure gas compressor can be kept constant. .

Further, according to a third aspect of the present invention, there is provided a method for controlling a gas turbine power plant, comprising: an air compressor for compressing air; a low-pressure gas compressor for increasing the pressure of fuel gas to a low pressure; Cooling means for cooling the fuel gas pressurized by the gas compressor, a high-pressure gas compressor for pressurizing the fuel gas cooled by the cooling means to a high pressure, and air compressed by the air compressor. A combustor for supplying and burning the fuel gas pressurized by the gas compressor of the high pressure stage, a gas turbine driven by the energy of the combustion gas from the combustor to drive the generator, and the gas of the low pressure stage Cooling substance injection means for inputting a cooling substance for cooling the fuel gas in the fuel gas pressurized by the compressor or in the fuel gas cooled by the cooling means, and Is characterized in that heat of the fuel gas changes the supply quantity of fuel gas supplied to fit the cooling material input to be inputted by the cooling material input means to be constant in the gas compressor of the low pressure stage.

According to a fourth aspect of the present invention, in the control method of the gas turbine power generation equipment according to the third aspect, the cooling substance input means includes a fuel pressurized by the low-pressure stage gas compressor. Moisture blowing means configured to blow water into the gas or into the fuel gas cooled by the cooling means, and the water blowing means blows the water so that the calorific value of the fuel gas after the water is supplied becomes constant. It is characterized in that the supply amount of the fuel gas supplied to the low-pressure stage gas compressor is changed in accordance with the amount.

In the gas turbine power generation equipment and the control method according to the second and fourth aspects, saturated water is preferably used as the moisture blown into the fuel gas, but hot water or cold water may be used. Further, the steam may be obtained by using the residual heat of the exhaust gas generated in the gas turbine power generation equipment of the present invention, or may be steam obtained by another steam generator. Further, in the gas turbine power generation equipment and the control method thereof according to claims 1 to 4, as the fuel gas flowing into the gas compressor of the low pressure stage, for example, high calorie gas such as liquefied natural gas (LNG) or coke oven gas is used. The mixed gas is preferably a mixture of a low calorie gas such as a blast furnace gas.

[0016]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of a first embodiment of a gas turbine power generation facility according to the present invention. In FIG. 1, a gas turbine power generation system 1 includes an air compressor 2 for compressing air and a low-pressure stage for increasing the pressure of a fuel gas obtained by mixing a high-calorie gas such as LNG and coke oven gas and a low-calorie gas such as a blast furnace gas. A gas compressor 3a, an intercooler 3c as cooling means for cooling the fuel gas pressurized by the low-pressure stage gas compressor 3a, and an intercooler 3
(c) a high-pressure gas compressor 3b for increasing the pressure of the fuel gas cooled to high pressure, and air supplied by the air compressor 2 and fuel gas pressurized by the high-pressure gas compressor 3b for combustion. A combustor 4 to be driven and a gas turbine 5 driven by energy of combustion gas from the combustor 4 and driving a generator 6 are provided.

The gas turbine power generation equipment 1 is provided with a cooling substance input means 7 for inputting a cooling substance for cooling the fuel gas into the fuel gas pressurized by the gas compressor 3a of the low pressure stage.
The supply of the fuel gas to be supplied to the gas compressor 3a of the low pressure stage according to the amount of the cooling substance charged by the cooling substance charging means 7 so that the calorific value of the fuel gas after the cooling substance is charged is constant. Heat quantity control means 10 for changing the quantity.

The cooling substance supplied from the cooling substance supplying means 7 is preferably saturated steam, but may be other water such as hot water or cold water. Further, a cooling substance capable of cooling a fuel gas such as nitrogen gas other than water may be used. In the cooling substance injection means 7 shown in FIG. 1, specifically, saturated steam is blown into the fuel gas pressurized by the low-pressure stage gas compressor 3a. Constitutes steam blowing means (moisture blowing means).

The steam blowing means (cooling substance charging means, water blowing means) 7 comprises a steam generator 8 for generating saturated steam and a steam generator 8 in the fuel gas pressurized by the low-pressure stage gas compressor 3a. And a mixer 9 for mixing the saturated steam from the mixer. Also, the calorie control means 10
Is a steam flow sensor 11 for detecting the flow rate of saturated steam from the steam generator 8, a calorimeter 13 for detecting the calorific value of the fuel gas supplied to the gas compressor 3a at the low pressure stage, and the temperature of the fuel gas. Thermometer 14 to detect and flow control device 15
It is composed of This flow control device 15 is pressurized by the gas compressor 3a of the low-pressure stage from the flow rate of the saturated steam by the steam flow sensor 11, the calorie of the fuel gas by the calorimeter 13, and the temperature of the fuel gas by the thermometer 14, and the steam is increased. The calorific value of the injected fuel gas (point A in FIG. 1) is calculated, and the high calorie gas flow control valve 16 is controlled so that the calorific value is constant. Here, the flow control device 15 is provided with a flow control valve 12 for saturated steam.
Can also be controlled. In addition, the flow control device 15
In FIG. 1, only the flow control valve 16 for high calorie gas is controlled, but only the flow control valve 19 for low calorie gas or the flow control valve for both high calorie gas and low calorie gas is controlled. 16 and 19 may be controlled.

In FIG. 1, reference numeral 17 denotes a flow sensor for high calorie gas, 18 denotes a flow sensor for low calorie gas, 20 denotes a mixer for mixing high calorie gas and low calorie gas, and 21 denotes a gas compressor 3b of a high pressure stage. A fuel gas flow rate sensor 22 which is pressurized by the above is a flow rate control valve for the fuel gas. Next, the power generation process will be described. LN
G, high calorie gas such as coke oven gas and low calorie gas such as blast furnace gas are mixed in the mixer 20 and flow into the low-pressure stage gas compressor 3a as a mixed gas, and the low-pressure stage gas compressor 3a reduces the pressure. It is boosted. On the other hand, in the fuel gas pressurized by the low-pressure stage gas compressor 3 a, the saturated steam generated by the steam generator 8 is mixed by the mixer 9. The low-temperature low-pressure fuel gas pressurized by the low-pressure stage gas compressor 3a is cooled by saturated steam, flows into the intercooler 3c, and is further cooled to a predetermined temperature by the intercooler 3c. Therefore, the amount of cooling water of the intercooler 3c can be reduced, and the size of the intercooler 3c can be reduced accordingly. Then, the fuel gas cooled by the intercooler 3c flows into the gas compressor 3b of the high pressure stage, and is pressurized to a high pressure by the gas compressor 3b of the high pressure stage. As described above, the gas compressor for increasing the pressure of the fuel gas in which the low calorie gas and the high calorie gas are mixed is divided into the low-pressure gas compressor 3a and the high-pressure gas compressor 3b, and the intercooler 3c is disposed therebetween. The temperature of the fuel gas, which has been raised to a low pressure by the low-pressure stage gas compressor 3a,
The reason why the low-temperature fuel gas is pressurized to a high pressure by the gas compressor 3b in the high-pressure stage is to make the compression in the gas compressor close to isothermal compression and increase the compression efficiency of the gas compressor. Note that the temperature and pressure of the gas pressurized by the gas compressors 3a and 3b in the low-pressure stage and the high-pressure stage and the temperature cooled by the intercooler 3c are appropriately determined according to the output of the gas turbine and the like.

The fuel gas pressurized by the high-pressure gas compressor 3 b is supplied to the combustor 4. In the combustor 4, the fuel gas is burned together with the compressed air compressed by the air compressor 2, and the gas turbine 5 is driven by the energy of the combustion gas. The gas turbine 5 drives the generator 6 together with the air compressor 2 and the gas compressors 3a and 3b, and the power output from the generator 6 is supplied to various electric loads.

On the other hand, the exhaust gas of the gas turbine 5 is guided to a waste heat boiler (not shown), and is discharged to the atmosphere through a chimney. Note that heat is recovered from the exhaust gas by an exhaust heat boiler, thereby generating saturated steam. A part of the saturated steam is used as a process steam in a steam turbine (not shown), and the other surplus is used as gas in a low-pressure stage. The fuel may be blown into the fuel gas pressurized by the compressor 3a.

In the above-described power generation process, the saturated steam is blown into the fuel gas pressurized by the low-pressure stage gas compressor 3a. As described above, hot water or cold water other than the saturated steam is used. Water may be blown. Further, nitrogen gas other than water may be blown. When water is blown, the specific heat is higher than that of nitrogen gas, so that the power generation output by the gas turbine 5 can be increased.

Next, the heat control process by the heat control means 10 will be described. A part of the saturated steam from the steam generator 8 is supplied to the use destination, and the other surplus is blown into the fuel gas pressurized by the gas compressor 3a of the low pressure stage.
When generating this saturated steam, it is necessary to pressurize and heat the hot water, but since water can be pressurized more easily than nitrogen gas, a small pump can be used and the cost is reduced. can do.

By the way, when the saturated steam is blown into the fuel gas, the amount of the saturated steam blown into the fuel gas may fluctuate. The calorific value of the fuel gas at point A also varies. On the other hand, the supply amount of the low-calorie gas fluctuates largely due to the stoppage of the blast furnace, and the required amount of the low-calorie gas cannot be supplied to the low-pressure stage gas compressor 3a. The supply amount of the fuel gas as the mixed gas that enters may fluctuate.

However, when the saturated steam is blown, the steam flow sensor 11 of the calorie control means 10 detects the flow rate of the saturated steam, and the calorimeter 13 detects the fuel gas as the mixed gas flowing into the gas compressor 3a of the low pressure stage. The amount of heat of the
1 detects the temperature of the fuel gas, and the flow controller 15 determines the point A in FIG. 1 based on the flow rate of the saturated steam by the steam flow sensor 11, the calorie of the fuel gas by the calorimeter 13, and the temperature of the fuel gas by the thermometer 14. The calorie of the fuel gas is calculated, and the calorific gas flow control valve 16 is controlled so that the calorie is constant.
Control. That is, the flow control device 15 is used for high calorie gas when the amount of saturated steam to be blown is large, or when the blast furnace is stopped and the supply amount of low calorie gas is small, and the calorific value of the fuel gas at point A in FIG. Is controlled to open the flow control valve 16 to increase the supply amount of high calorie gas. On the other hand, when the amount of saturated steam to be blown is small and the amount of heat of the fuel gas at point A in FIG. 1 is large, the flow rate control valve 16 for high calorie gas is controlled to be closed to reduce the supply amount of high calorie gas. . Therefore, when saturated steam is blown into the fuel gas pressurized by the low-pressure gas compressor 3a, the amount of saturated steam blown into the fuel gas fluctuates, or the blast furnace stops. Even if the supply amount of the low-calorie gas fluctuates greatly for reasons such as the above, the calorie control means 10 controls the gas compressor 3 of the low-pressure stage in accordance with the amount of steam blown.
a, the calorific value of the fuel gas after the saturated steam is blown, and the calorific value of the fuel gas after the pressurization by the gas compressor 3b of the high-pressure stage can be made constant. As a result, the power output by the gas turbine 5 is stabilized. Therefore, the embodiments of the present invention have been described as long as the operation at the power plant can be continued without lowering the output of the power generation equipment or performing a primary stop.However, the present invention is not limited to this, and various changes may be made. It can be carried out. For example, the cooling substance input means 7 supplies the cooling substance containing the saturated vapor not only in the fuel gas pressurized by the gas compressor 3a of the low pressure stage before the intercooler 3c but also in the fuel gas cooled by the intercooler 3c. You may make it throw in.

[0027]

As described above, according to the gas turbine power plant of the present invention and the control method of the gas turbine power plant of the third aspect of the present invention, the cooling substance input means is provided in the low pressure stage. Since a cooling substance for cooling the fuel gas is introduced into the fuel gas pressurized by the gas compressor or the fuel gas cooled by the cooling means, the fuel gas or the cooling means pressurized by the low-pressure stage gas compressor. Since the cooled fuel gas is cooled and the temperature thereof decreases, the cooling capacity such as the amount of cooling water of the cooling means can be reduced, and the cooling means can be downsized. Then, the calorie control means controls the fuel supplied to the gas compressor of the low-pressure stage in accordance with the amount of the cooling substance charged by the cooling substance charging means so that the amount of heat of the fuel gas after the cooling substance is charged becomes constant. Change the gas supply. For this reason, even if the supply amount of the fuel gas entering the gas compressor of the low pressure stage fluctuates due to a stop of the blast furnace or the like, the calorific value control means
The amount of fuel gas supplied to the low-pressure stage gas compressor is changed in accordance with the amount of cooling substance charged by the cooling substance charging means, so that the amount of heat of the fuel gas after the cooling substance is charged is constant, and thus the high pressure The calorific value of the fuel gas pressurized by the gas compressor of the stage can be made constant. Therefore, the operation in the power plant can be continued without lowering the output of the power generation equipment or performing a temporary stop.

Further, according to the gas turbine power generation equipment according to claim 2 of the present invention and the control method of the gas turbine power generation equipment according to claim 4, the water blowing means is pressurized by the gas compressor of the low pressure stage. Moisture such as saturated steam, hot water, or cold water can be blown into the fuel gas or the fuel gas cooled by the cooling means to cool the fuel gas. Since this moisture has a higher specific heat than nitrogen gas, it is possible to increase the power output by the power generation equipment. When injecting saturated steam as moisture, it is necessary to pressurize and heat hot water to generate saturated steam, but pressurizing water is easier than pressurizing nitrogen gas. A pump or the like can be used, and the cost can be reduced. Then, the calorific value control means adjusts the supply amount of the fuel gas to be supplied to the gas compressor of the low pressure stage in accordance with the amount of water blown by the water blowing means so that the amount of heat of the fuel gas after the water is blown becomes constant. To change. For this reason, even if the supply amount of the fuel gas entering the gas compressor of the low pressure stage fluctuates due to a stop of the blast furnace or the like, the calorie control means adjusts the gas pressure of the low pressure stage according to the amount of water blown by the water blowing means. By changing the amount of fuel gas supplied to the compressor, the calorific value of the fuel gas after moisture has been blown can be kept constant, and the calorific value of the fuel gas boosted by the high-pressure gas compressor can be kept constant. .

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of a gas turbine power generation facility according to the present invention.

FIG. 2 is a schematic configuration diagram of a conventional gas turbine power generation facility.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Gas turbine power generation equipment 2 Air compressor 3a Low-pressure stage gas compressor 3b High-pressure stage gas compressor 3c Intercooler (cooling means) 4 Combustor 5 Gas turbine 6 Generator 7 Steam blowing means (cooling substance injection means, moisture blowing Means) 8 Steam generator 9 Mixer 10 Heat quantity control means 11 Steam flow sensor 12 Flow control valve for saturated steam 13 Calorimeter 14 Thermometer 15 Flow control device 16 Flow control valve for high calorie gas 17 Flow sensor for high calorie gas 18 Flow rate sensor for low calorie gas 19 Flow rate control valve for low calorie gas 20 Mixer 21 Flow rate sensor for fuel gas 22 Flow rate control valve for fuel gas 101 Gas turbine power generation equipment 102 Air compressor 103a Gas compressor 103b for low pressure stage 103b High-pressure gas compressor 103c Intercooler 104 Combustor 05 Gas turbine 106 Generator 107 Flow sensor for high calorie gas 108 Flow control valve for high calorie gas 109 Flow sensor for low calorie gas 110 Flow control valve for low calorie gas 111 Mixer 112 Flow sensor for fuel gas 113 For fuel gas Flow control valve

Claims (4)

[Claims] An air compressor for compressing air; a low-pressure gas compressor for increasing the pressure of the fuel gas to a low pressure; cooling means for cooling the fuel gas pressurized by the low-pressure gas compressor; A high-pressure gas compressor for pressurizing the fuel gas cooled by the cooling means to a high pressure; and supplying air compressed by the air compressor and the fuel gas pressurized by the high-pressure gas compressor for combustion. And a gas turbine driven by the energy of the combustion gas from the combustor, and a gas turbine that drives a generator, in the fuel gas pressurized by the low-pressure stage gas compressor or A cooling substance input means for inputting a cooling substance for cooling the fuel gas into the fuel gas cooled by the cooling means, and a heat quantity of the fuel gas after the cooling substance is input so as to be constant. Gas turbine power generation equipment, comprising: heat quantity control means for changing a supply amount of fuel gas supplied to the gas compressor of the low pressure stage in accordance with a cooling substance introduction amount supplied by the cooling substance introduction means. . 2. The heat control device according to claim 2, wherein the cooling substance injection means is a water blowing means for blowing water into the fuel gas pressurized by the low-pressure stage gas compressor or into the fuel gas cooled by the cooling means. The means changes the supply amount of the fuel gas supplied to the gas compressor of the low-pressure stage according to the amount of water blown by the water blowing means so that the calorific value of the fuel gas after the water is blown is constant. The gas turbine power generation equipment according to claim 1, wherein the power generation is performed. 3. An air compressor for compressing air, a low-pressure gas compressor for increasing the pressure of fuel gas to a low pressure, cooling means for cooling the fuel gas pressurized by the low-pressure gas compressor, and A high-pressure gas compressor for pressurizing the fuel gas cooled by the cooling means to a high pressure; and supplying air compressed by the air compressor and the fuel gas pressurized by the high-pressure gas compressor for combustion. A combustor to be driven, a gas turbine driven by the energy of the combustion gas from the combustor and driving a generator, and a fuel cooled in the fuel gas pressurized by the low-pressure stage gas compressor or by the cooling means. A cooling substance inputting means for inputting a cooling substance for cooling the fuel gas into the gas, wherein the cooling substance is input by the cooling substance inputting means so that the calorific value of the fuel gas after the cooling substance is input becomes constant. Control method for a gas turbine generator, characterized in that in accordance with the 却物 quality input amount varying the supply amount of the fuel gas supplied to the gas compressor of the low pressure stage. 4. The cooling substance injection means is constituted by a water blowing means for blowing water into the fuel gas pressurized by the gas compressor at the low pressure stage or into the fuel gas cooled by the cooling means. The amount of fuel gas supplied to the low-pressure stage gas compressor is changed in accordance with the amount of water blown by the water blowing means so that the amount of heat of the injected fuel gas becomes constant. The method for controlling a gas turbine power generation facility according to claim 3.