Method for making maximum output of gas turbine, method for making output for control of gas turbine, method for control of gas turbine, device for executing these methods, and program for causing computer to execute these methods

Abstract

The maximum output maker includes: a temperature receiving section that receives an intake air temperature of air sucked by a compressor of a gas turbine; a change receiving section that receives a change content of a maximum opening degree in an intake air amount adjusting machine of the compressor; a basic maximum output calculating section that calculates a basic maximum output of the gas turbine based on the intake air temperature received by the temperature receiving section; a coefficient making section that makes a maximum output correction coefficient for correcting the basic maximum output based on the change content of the maximum opening degree received by the change receiving section and the intake air temperature received by the temperature receiving section; and a maximum output correcting section that corrects the basic maximum output using the maximum output correction coefficient.

Description

Technical Field

[0001] This invention relates to a method for producing the maximum output of a gas turbine, a method for producing the control output of a gas turbine, a method for controlling a gas turbine, an apparatus for performing these methods, and a program for executing these methods by a computer.

[0002] This application claims priority based on Japanese Patent Application No. 2020-182923, filed on October 30, 2020, the contents of which are incorporated herein by reference. Background Technology

[0003] A gas turbine includes a compressor for compressing air, a combustor for burning fuel in the air compressed by the compressor to produce combustion gases, and a turbine driven by the combustion gases. The compressor has a compressor rotor, a compressor housing covering the compressor rotor, and an inlet guide vane (IGV). The IGV is located at the intake of the compressor housing and regulates the flow rate of air drawn into the compressor housing. A generator rotor is connected to the compressor rotor.

[0004] Patent Document 1 discloses a technique for determining the IGV opening degree based on the temperature of the air drawn in by the compressor or the output of the gas turbine (= generator output). The IGV opening degree is limited to not exceeding a predetermined maximum opening degree for control IGV.

[0005] Previous technical documents

[0006] Patent documents

[0007] Patent Document 1: Japanese Patent Application Publication No. 2009-019528 Summary of the Invention

[0008] The technical problem to be solved by the invention

[0009] In gas turbine installation sites, the maximum opening setting of the IGV (Inlet Gas Vault) for control is sometimes changed based on the results of trial runs, etc. Furthermore, when the gas turbine installation site is in an area with large temperature differences, it is sometimes desirable to change the maximum opening setting of the IGV during cold periods and the maximum opening setting during warm periods.

[0010] If the maximum IGV opening setting changes, the gas flow rate within the turbine or the fuel flow rate supplied to the combustor will also change. Therefore, assuming that even if the maximum IGV opening setting is changed, the maximum output setting for gas turbine control remains unchanged, sometimes the temperature of the combustion gas at the turbine inlet may exceed the upper limit or fall far below it. Thus, simply changing the maximum IGV opening setting can lead to poor gas turbine control, potentially shortening the turbine's lifespan or reducing its output.

[0011] Therefore, the object of the present invention is to provide a technique that can suppress gas turbine control malfunctions even when the setting of the maximum opening of the IGV is changed.

[0012] means for solving technical problems

[0013] In the gas turbine maximum output generator, as one method of achieving the aforementioned objective

[0014] The gas turbine includes a compressor capable of compressing air to generate compressed air, a burner capable of burning fuel in the compressed air to generate combustion gas, and a turbine driven by the combustion gas. The compressor has an intake flow regulator for adjusting the flow rate of the air it draws in. The maximum output generator includes: a temperature receiving unit for receiving the temperature of the air drawn in by the compressor, i.e., the intake temperature; a change receiving unit for receiving changes in the maximum opening of the intake flow regulator; a basic maximum output calculation unit for calculating the basic maximum output of the gas turbine based on the intake temperature received by the temperature receiving unit; a coefficient generation unit for generating a maximum output correction coefficient for correcting the basic maximum output based on the changes in the maximum opening received by the change receiving unit and the intake temperature received by the temperature receiving unit; and a maximum output correction unit for correcting the basic maximum output using the maximum output correction coefficient and outputting the corrected basic maximum output as a control maximum output.

[0015] In this method, changes to the maximum opening of the intake air volume regulator can be received. Furthermore, in this method, the maximum output for controlling the gas turbine is adjusted based on these changes and the intake air temperature. Therefore, in this method, even if the setting of the maximum control opening is changed, it will not lead to a shortened gas turbine life or a reduction in output, thereby suppressing gas turbine control malfunctions.

[0016] As one method of achieving the aforementioned objective, a control output generator for a gas turbine includes:

[0017] The first embodiment includes a maximum output generator for the gas turbine and an output corrector for correcting the control output of the gas turbine. The output corrector comprises: a correction coefficient generator for generating correction coefficients used when correcting the control output; an output correction unit for correcting the control output using the correction coefficients and outputting the corrected control output as a corrected control output; an output receiving unit for receiving at least the output from an output device that detects the output of the gas turbine; and an output storage unit for storing the output received by the output receiving unit. The correction coefficient generator comprises: a first coefficient element calculation unit for calculating a first coefficient element; a second coefficient element calculation unit for calculating a second coefficient element; and a correction coefficient calculation unit for calculating the correction coefficient using the first coefficient element and the second coefficient element. The output storage unit can store: a reference output, i.e., the output under the condition that the gas turbine could output its maximum output at a past reference time point; and the preceding output received by the output receiving unit in a time period closer to the present than the reference time point, under the condition that the gas turbine could output its maximum output. The first coefficient element is the ratio of the preceding output stored in the output storage unit to the reference output stored in the output storage unit. The second coefficient element is the ratio of the current output received by the output receiving unit to the preceding output stored in the output storage unit during the current time period from the preceding time period to the present, under the condition that the gas turbine can output its maximum output. The output corrector corrects the maximum control output output from the maximum output generator as one of the control outputs.

[0018] In this method, a correction coefficient is obtained using a first coefficient element and a second coefficient element. This correction coefficient represents the degree of degradation of the output accompanying the deterioration of gas turbine performance. Furthermore, the first and second coefficient elements also represent the degree of degradation of the output accompanying the deterioration of gas turbine performance. However, the first and second coefficient elements represent the degree of degradation of the output over different time periods. Specifically, the first coefficient element represents the degradation of the output over the preceding time period from a reference time point, and the second coefficient element represents the degradation of the output over the current time period from the preceding time period. Thus, in this method, a correction coefficient is obtained using multiple different coefficient elements, and this correction coefficient is used to correct the control output.

[0019] Therefore, in this method, a corrective control output that appropriately reflects the degree of degradation of the output can be obtained.

[0020] As one method of achieving the aforementioned objective, a control device for a gas turbine includes:

[0021] The first embodiment includes a maximum output generator for the gas turbine; a command value generation unit that generates a command value for a control object of the gas turbine using the maximum output for control output from the maximum output generator; and a control signal output unit that outputs a control signal representing the command value to the control object.

[0022] As mentioned above, the maximum output generator in this method receives changes to the maximum opening of the intake air volume regulator and adjusts the maximum control output of the gas turbine based on these changes and the intake air temperature. In this method, a command value for the controlled object is generated using the maximum control output corresponding to the changes in the maximum opening of the intake air volume regulator, and a control signal representing this command value is output to the controlled object. Therefore, in this method, even if the setting of the maximum control opening is changed, control malfunctions of the controlled object can be suppressed.

[0023] As another method for achieving the aforementioned objective, the control device for the gas turbine includes:

[0024] The first embodiment includes a control output generator for a gas turbine; a command value generation unit that generates a command value for a control object of the gas turbine using the modified control output output from the control output generator; and a control signal output unit that outputs a control signal representing the command value to the control object.

[0025] As mentioned above, the maximum output generator in this method receives changes to the maximum opening of the intake air volume regulator and corrects the maximum control output of the gas turbine based on these changes and the intake air temperature. Furthermore, as mentioned earlier, the output corrector in this control output generator can obtain a maximum output that appropriately reflects the degree of output degradation. In this method, a command value for the controlled object is generated using this corrected control output, and a control signal representing this command value is output to the controlled object. Therefore, in this method, even if the setting of the maximum control opening is changed, control malfunctions of the controlled object caused by the change, and consequently, control malfunctions of the controlled object caused by gas turbine performance degradation, can be suppressed.

[0026] In one method for producing the maximum output of a gas turbine to achieve the aforementioned objective...

[0027] The gas turbine includes a compressor capable of compressing air to generate compressed air, a burner capable of burning fuel in the compressed air to generate combustion gas, and a turbine capable of being driven by the combustion gas. The compressor has an intake flow regulator for regulating the flow rate of the air it draws in.

[0028] The maximum output generation method comprises the following steps: a temperature receiving step, which receives the temperature of the air drawn in by the compressor, i.e., the intake temperature; a change receiving step, which receives changes in the maximum opening of the intake air volume regulator; a basic maximum output calculation step, which calculates the basic maximum output of the gas turbine based on the intake temperature received in the temperature receiving step; a coefficient generation step, which generates a maximum output correction coefficient for correcting the basic maximum output based on the changes in the maximum opening received in the change receiving step and the intake temperature received in the temperature receiving step; and a maximum output correction step, which corrects the basic maximum output using the maximum output correction coefficient and outputs the corrected basic maximum output as the control maximum output.

[0029] As one method for achieving the stated objective, the gas turbine control output generation method executes the maximum output generation method of the gas turbine in the stated method, and executes an output correction method for correcting the control output of the gas turbine.

[0030] The output correction method comprises the following steps: a correction coefficient creation step, which creates correction coefficients used to correct the control output of the gas turbine; an output correction step, which uses the correction coefficients to correct the control output and outputs the corrected control output as a corrected control output; an output receiving step, which receives at least the output from an output device that detects the output of the gas turbine; and an output storage step, which stores the output received in the output receiving step. The correction coefficient creation step includes: a first coefficient element calculation step, which calculates a first coefficient element; a second coefficient element calculation step, which calculates a second coefficient element; and a correction coefficient calculation step, which uses the first coefficient element and the second coefficient element to calculate the correction coefficient. The output storage step stores: the baseline output, i.e., the output at a past reference time point where the gas turbine could output its highest output; and the preceding output received in the output receiving step, at a time period closer to the present, under the condition that the gas turbine could output its highest output. The first coefficient element is the ratio of the preceding output stored in the output storage step to the baseline output stored in the output storage step. The second coefficient element is the ratio of the current output received in the output receiving process to the preceding output stored in the output storage process, under the condition that the gas turbine can output the highest output, during the current time period from the preceding time period to the present.

[0031] As one way to achieve the stated objective, a gas turbine control method executes a maximum output generation method for the gas turbine in the stated method, and performs the following steps: a command value generation step, using the maximum output for control obtained by the maximum output generation method to generate a command value for a control object of the gas turbine; and a control signal output step, outputting a control signal representing the command value to the control object.

[0032] As another way to achieve the stated purpose, the gas turbine control method executes the gas turbine control output generation method in the aforementioned method, and performs the following steps: an instruction value generation step, using the modified control output obtained by the control output generation method to generate an instruction value for the gas turbine control object; and a control signal output step, outputting a control signal representing the instruction value to the control object.

[0033] In the process of manufacturing the maximum output of a gas turbine as a means of achieving the aforementioned objective

[0034] The gas turbine includes a compressor capable of compressing air to generate compressed air, a burner capable of burning fuel in the compressed air to generate combustion gas, and a turbine capable of being driven by the combustion gas. The compressor has an intake flow regulator for regulating the flow rate of the air it draws in.

[0035] The maximum output generation procedure causes the computer to perform the following steps: a temperature receiving step, receiving the temperature of the air drawn in by the compressor, i.e., the intake temperature; a change receiving step, receiving changes in the maximum opening of the intake air volume regulator; a basic maximum output calculation step, calculating the basic maximum output of the gas turbine based on the intake temperature received in the temperature receiving step; a coefficient generation step, generating a maximum output correction coefficient for correcting the basic maximum output based on the changes in the maximum opening received in the change receiving step and the intake temperature received in the temperature receiving step; and a maximum output correction step, correcting the basic maximum output using the maximum output correction coefficient, and outputting the corrected basic maximum output as the control maximum output.

[0036] As one method for achieving the stated purpose, the control output generation program for a gas turbine includes a maximum output generation program for the gas turbine and an output correction program for correcting the control output of the gas turbine.

[0037] The output correction procedure causes the computer to perform the following steps: a correction coefficient creation step, creating correction coefficients used in correcting the control output of the gas turbine; an output correction step, using the correction coefficients to correct the control output and outputting the corrected control output as a corrected control output; an output receiving step, receiving at least the output from an output device that detects the output of the gas turbine; and an output storage step, storing the output received in the output receiving step. The correction coefficient creation step includes: a first coefficient element calculation step, calculating a first coefficient element; a second coefficient element calculation step, calculating a second coefficient element; and a correction coefficient calculation step, using the first coefficient element and the second coefficient element to calculate the correction coefficient. The output storage step stores: the baseline output, i.e., the output at a past reference time point where the gas turbine could output its highest output; and the preceding output received in the output receiving step, at a time period closer to the present than the reference time point, under the condition that the gas turbine could output its highest output. The first coefficient element is the ratio of the preceding output stored in the output storage step to the baseline output stored in the output storage step. The second coefficient element is the ratio of the current output received in the output receiving process to the preceding output stored in the output storage process, under the condition that the gas turbine can output the highest output, during the current time period from the preceding time period to the present.

[0038] As one method for achieving the stated purpose, the control program for the gas turbine has a maximum output generation program for the gas turbine in the stated method, and causes the computer to perform the following steps: an instruction value generation step, using the maximum output for control obtained by executing the maximum output generation program, to generate an instruction value for a control object of the gas turbine; and a control signal output step, outputting a control signal representing the instruction value to the control object.

[0039] As one method for achieving the stated purpose, the control program for the gas turbine includes a control output creation program for the gas turbine in the stated method, and causes the computer to perform the following steps: an instruction value creation step, which uses the modified control output obtained by executing the control output creation program to create an instruction value for the control object of the gas turbine; and a control signal output step, which outputs a control signal representing the instruction value to the control object.

[0040] Invention Effects

[0041] In one aspect of the present invention, changes to the maximum opening of the intake air volume regulator can be received. Furthermore, in this aspect, even when the maximum opening setting is changed, malfunctions in gas turbine control can be suppressed. Attached Figure Description

[0042] Figure 1 This is a schematic structural diagram of a gas turbine device according to one embodiment of the present invention.

[0043] Figure 2 This is a cross-sectional view of a burner according to one embodiment of the present invention.

[0044] Figure 3 This is a cross-sectional view of the main part of the burner in one embodiment of the present invention.

[0045] Figure 4 This is a functional block diagram of a control device according to one embodiment of the present invention.

[0046] Figure 5 This is a functional block diagram of a combustion load command generator in one embodiment of the present invention.

[0047] Figure 6 This is a functional block diagram of a fuel flow command generator in one embodiment of the present invention.

[0048] Figure 7 This is a functional block diagram of the load rate calculator in one embodiment of the present invention.

[0049] Figure 8 This is a functional block diagram of a flow ratio calculator in one embodiment of the present invention.

[0050] Figure 9 This is a functional block diagram of a valve command value generator in one embodiment of the present invention.

[0051] Figure 10 This is a functional block diagram of the maximum output generator in one embodiment of the present invention.

[0052] Figure 11 This is a functional block diagram of the output corrector in one embodiment of the present invention.

[0053] Figure 12 This is a graph illustrating the function F1 in one embodiment of the present invention.

[0054] Figure 13 This is a graph illustrating the function F2 in one embodiment of the present invention.

[0055] Figure 14 This is a graph illustrating the function G1 in one embodiment of the present invention.

[0056] Figure 15This is a graph illustrating the function G2 in one embodiment of the present invention.

[0057] Figure 16 This is a graph illustrating the function F3 in one embodiment of the present invention.

[0058] Figure 17 This is a graph illustrating the function F4 in one embodiment of the present invention.

[0059] Figure 18 This is a graph illustrating functions F5 and F6 in one embodiment of the present invention.

[0060] Figure 19 This is a graph illustrating the function F7 in one embodiment of the present invention.

[0061] Figure 20 This is a graph illustrating the function F8 in one embodiment of the present invention.

[0062] Figure 21 This is an explanatory diagram showing the hardware structure of the control device in one embodiment of the present invention.

[0063] Figure 22 This is a flowchart illustrating the operation of the maximum output generator in one embodiment of the present invention.

[0064] Figure 23 This is a flowchart illustrating the output receiving routine executed by the output corrector in one embodiment of the present invention.

[0065] Figure 24 This is a flowchart illustrating the correction routine performed by the output corrector in one embodiment of the present invention.

[0066] Figure 25 This is an explanatory diagram illustrating the changes of various coefficient elements, correction coefficients, and correction control outputs over time in one embodiment of the present invention.

[0067] Figure 26 This is a flowchart illustrating the operation of the control device in one embodiment of the present invention.

[0068] Figure 27 This is a functional block diagram of the maximum output generator in a first variation of an embodiment of the present invention.

[0069] Figure 28 This is a flowchart illustrating the operation of the maximum output generator in a first variation of an embodiment of the present invention.

[0070] Figure 29 This is a system diagram of a combined circulation device in one embodiment of the present invention.

[0071] Figure 30 This is a functional block diagram of the maximum output generator in a second variation of an embodiment of the present invention. Detailed Implementation

[0072] Hereinafter, an embodiment of the maximum output generator, the control output generator including the maximum output generator, the control device including the control output generator, and the gas turbine equipment equipped with the control device according to the present invention will be described with reference to the accompanying drawings.

[0073] like Figure 1 As shown, the gas turbine device of this embodiment includes a gas turbine 10, a generator 29 that generates electricity by driving the gas turbine 10, and a control device 100 that controls the controlled object in the gas turbine 10.

[0074] The gas turbine 10 includes a compressor 11 for compressing air A, a burner 31 for generating combustion gas by burning fuel F in the air compressed by the compressor 11, and a turbine 21 driven by the high-temperature and high-pressure combustion gas.

[0075] The compressor 11 has a compressor rotor 13 that rotates around an axis Ar, a compressor housing 12 that rotatably covers the compressor rotor 13, and an intake air volume regulator (hereinafter referred to as IGV 14) disposed at the intake of the compressor housing 12. The IGV 14 has a plurality of guide vanes 15 and a driver 16 that drives the plurality of guide vanes 15. The IGV 14 regulates the flow rate of air drawn into the compressor housing 12.

[0076] The turbine 21 has a turbine rotor 23 that rotates about an axis Ar around the combustion gas from the burner 31, and a turbine housing 22 that rotatably covers the turbine rotor 23. The turbine rotor 23 and the compressor rotor 13 are interconnected to form a gas turbine rotor 28 that can rotate about the same axis Ar. A generator 29 rotor is connected in the gas turbine rotor 28.

[0077] The gas turbine 10 also includes an intermediate housing 24 and an exhaust housing 25. The intermediate housing 24 is disposed between the compressor housing 12 and the turbine housing 22 in the direction extending along the axis Ar, and connects the compressor housing 12 and the turbine housing 22. Compressed air Ac ejected from the compressor 11 flows into the intermediate housing 24. The exhaust housing 25 is disposed on the side opposite to the side where the intermediate housing 24 is disposed, with reference to the turbine housing 22. The combustion gas discharged from the turbine 21, i.e., the exhaust gas, flows within the exhaust housing 25.

[0078] The burner 31 is fixed to the intermediate housing 24. For example... Figure 2 As shown, the burner 31 includes an outer cylinder 32 fixed to the intermediate housing 24, a combustion cylinder (or tail cylinder) 33 disposed inside the intermediate housing 24 and conveying combustion gas to the combustion gas flow path of the turbine 21, and a fuel injector 41 that injects fuel and air into the combustion cylinder 33.

[0079] like Figure 2 and Figure 3 As shown, the fuel injector 41 includes an inner cylinder 42, a pilot burner 43 disposed on the central axis Ak of ​​the inner cylinder 42, a plurality of main burners 53 arranged at equal intervals along the circumference with the pilot burner 43 as the center, and a top cap nozzle 51 disposed on the outer circumference of the inner cylinder 42 on the inner circumference of the outer cylinder 32. Furthermore, in the direction extending from the central axis Ak of ​​the inner cylinder 42, the side in which the combustion gas G flows within the combustion cylinder 33 is designated as the downstream side, and the opposite side is designated as the upstream side.

[0080] The pilot burner 43 has a pilot nozzle 44 disposed on the central axis Ak of ​​the inner cylinder 42 and a cylindrical pilot air cylinder 45 surrounding the outer periphery of the pilot nozzle 44. A pilot cone 46 is formed on the downstream side of the pilot air cylinder 45, with its diameter gradually increasing towards the downstream side. A pilot air flow path 48 is formed on the inner periphery of the pilot air cylinder 45, through which compressed air Ac from the compressor 11 flows as pilot air Ap. Pilot fuel Fp injected from the pilot nozzle 44 burns (diffusion combustion) in the pilot air Ap ejected from the pilot air flow path 48 to form a diffusion flame 49.

[0081] The main burner 53 has a cylindrical inner main air cylinder 55 surrounding the outer periphery of the pilot air cylinder 45, a cylindrical outer main air cylinder 56 surrounding the outer periphery of the inner main air cylinder 55, a baffle 57 dividing the annular space between the outer periphery of the inner main air cylinder 55 and the inner periphery of the outer main air cylinder 56 into multiple portions circumferentially, and main nozzles 54 disposed between the multiple baffles 57. The multiple spaces defined by the inner main air cylinder 55, the outer main air cylinder 56, and the multiple baffles 57 form a main air flow path 58 through which compressed air Ac from the compressor 11 flows as main air Am. Main fuel Fm is injected from the main nozzles 54 disposed within the main air flow path 58 into the main air Am flowing through the main air flow path 58. Therefore, a premixed gas containing main air Am and main fuel Fm flows within the main air flow path 58 further downstream than the front end (downstream end) of the main nozzles 54. If the premixed gas flows out from the main air flow path 58, it will undergo combustion (premixed combustion) to form a premixed flame 59. The aforementioned diffused flame 49 serves to maintain the premixed flame 59.

[0082] The space formed by the inner circumference of the outer cylinder 32 and the outer circumference of the inner cylinder 42 guides the compressed air Ac from the compressor 11 into the compressed air flow path 52 inside the inner cylinder 42. The top cap nozzle 51 injects top cap fuel Ft into the compressed air flow path 52. Therefore, if the top cap fuel Ft is injected into the compressed air flow path 52, the top cap fuel Ft mixes into the main air Am and the pilot air Ap.

[0083] like Figure 1 and Figure 2 As shown, the gas turbine equipment of this embodiment also includes a pilot fuel line 61 for supplying pilot fuel Fp to the pilot nozzle 44, a main fuel line 62 for supplying main fuel Fm to the main nozzle 54, a top cap fuel line 63 for supplying top cap fuel Ft to the top cap nozzle 51, a pilot fuel valve 65 for regulating the flow rate of pilot fuel Fp, a main fuel valve 66 for regulating the flow rate of main fuel Fm, and a top cap fuel valve 67 for regulating the flow rate of top cap fuel Ft.

[0084] Pilot fuel line 61, main fuel line 62, and top cap fuel line 63 are all branches of fuel line 60. Pilot fuel valve 65 is located on pilot fuel line 61, main fuel valve 66 is located on main fuel line 62, and top cap fuel valve 67 is located on top cap fuel line 63.

[0085] In this embodiment, the controlled objects of the gas turbine 10 are the pilot fuel valve 65, the main fuel valve 66, the top cap fuel valve 67, and the IGV 14.

[0086] like Figure 1 As shown, the gas turbine equipment of this embodiment also includes a tachometer 71 for detecting the rotational speed N of the gas turbine rotor 28, an output meter 72 for detecting the output Pw of the generator 29, an intake temperature meter 73 for detecting the temperature of the air A drawn in by the compressor 11, i.e., the intake temperature Ti, an intake pressure meter 74 for detecting the pressure of the air drawn in by the compressor 11, i.e., the intake pressure (atmospheric pressure) Pi, a blade passage temperature meter 75 for detecting the temperature of the combustion gas immediately following the last stage of the turbine 21, i.e., the blade passage temperature Tb, and an exhaust temperature meter 76 for detecting the temperature Te of the exhaust gas in the exhaust casing 25 located downstream of the last stage of the turbine 21.

[0087] like Figure 4 As shown, the control device 100 includes an instruction value generating unit 110 that generates instruction values ​​for the control object of the gas turbine 10, a control output generator 170 that generates control outputs for the gas turbine 10, and a control signal output unit 190 that outputs control signals representing instruction values ​​to the control object. The control output generator 170 includes a maximum output generator 171 that generates the maximum control output and an output corrector 180 that corrects the control outputs of the gas turbine 10.

[0088] The command value generation unit 110 includes a combustion load command generator 120 that generates a combustion load command value CLCSO, a fuel flow command generator 130 that generates a fuel flow command value CSO, a load rate calculator 140 that calculates the load rate (%Load) of the gas turbine 10, a flow ratio calculator 150 that calculates the fuel flow ratio (PLr, THr), a valve command value generator 155 that generates valve command values ​​for each fuel valve 65, 66, 67, and an IGV command value generator 160 that generates IGV command values ​​representing the opening degree of the IGV.

[0089] The Combustion Load Command Value (CLCSO) is a dimensionless parameter representing the temperature of the combustion gas at the turbine inlet (hereinafter referred to as the inlet temperature), and is positively correlated with this inlet temperature. The Combustion Load Command Value (CLCSO) is set to 0% when the inlet temperature is at the lower limit and 100% when the inlet temperature is at the upper limit. For example, when the lower limit of the inlet temperature is set to 700°C and the upper limit is set to 1500°C, the Combustion Load Command Value (CLCSO) is expressed by the following formula.

[0090] CLCSO(%) = {(Measured value of gas turbine output - 700℃ MW)}

[0091] / (1500℃MW-700℃MW)}×100

[0092] Additionally, 700℃MW refers to the gas turbine output when the inlet temperature is at the lower limit (700℃), and 1500℃MW refers to the gas turbine output when the inlet temperature is at the upper limit (1500℃). Here, gas turbine output refers to generator output.

[0093] like Figure 5 As shown, the combustion load command generator 120 includes a 700°C MW arithmetic unit 121a, a 1500°C MW arithmetic unit 121b, a standard atmospheric pressure generator 122, a first divider 123, a first multiplier 124a, a second multiplier 124b, a first subtractor 125a, a second subtractor 125b, a second divider 126, and a limiter 127.

[0094] The 700℃MW calculator 121a sets the intake air temperature Ti and the IGV command value IGVc as variable parameters and uses function H1 to calculate the gas turbine output of 700℃MW when the inlet temperature is 700℃. Similarly, the 1500℃MW calculator 121b sets the intake air temperature Ti and the IGV command value IGVc as variable parameters and uses function H2 to calculate the gas turbine output of 1500℃MW when the inlet temperature is 1500℃. Here, the IGV command value IGVc is the command value given by the control device 100 to the driver 16 of the IGV14. These MW calculators 121a and 121b change the known values ​​of 700℃MW and 1500℃MW when the intake air temperature and the IGV command value IGVc are the base values ​​to values ​​corresponding to the actual intake air temperature Ti and the IGV command value IGVc, and output the changed values ​​as 700℃MW and 1500℃MW.

[0095] Both the 700℃MW and 1500℃MW are control outputs of the gas turbine 10. The 700℃MW is corrected to a corrected 700℃MWm by the output corrector 180. Furthermore, the 1500℃MW is corrected to a corrected 1500℃MWm by the output corrector 180. Both the corrected 700℃MWm and the corrected 1500℃MWm are correction control outputs of the gas turbine 10.

[0096] The 700℃MWm and 1500℃MWm corrections from the output corrector 180 are corrected based on the measured intake pressure (atmospheric pressure) Pi. Specifically, the first divider 123 calculates the ratio of the intake pressure (atmospheric pressure) Pi detected by the intake pressure gauge 74 to the standard intake pressure (standard atmospheric pressure) Ps from the standard atmospheric pressure generator 122, i.e., the intake pressure ratio Pr. The first multiplier 124a multiplies the 700℃MWm correction from the output corrector 180 by the intake pressure ratio Pr, correcting the 700℃MWm correction to a value corresponding to the intake pressure ratio Pr. The second multiplier 124b multiplies the 1500℃MWm correction from the output corrector 180 by the intake pressure ratio Pr, correcting the 1500℃MWm correction to a value corresponding to the intake pressure ratio Pr. That is, the known values ​​of 700℃MW and 1500℃MW with the intake air temperature and IGV command value IGVc as the reference values ​​are corrected to the values ​​corresponding to the measured intake air temperature Ti, IGV command value IGVc and measured intake pressure ratio Pr.

[0097] The first subtractor 125a subtracts the correction 700°C MWm, corrected by the intake pressure ratio Pr, from the measured output PW of the gas turbine 10 detected by the output instrument 72. That is, the first subtractor 125a calculates the value of the numerator of the above formula. The second subtractor 125b subtracts the correction 700°C MWm, corrected by the intake pressure ratio Pr, from the correction 1500°C MWm.

[0098] That is, the second subtractor 125b calculates the value of the denominator of the above expression.

[0099] The second divider 126 divides the numerator of the above expression obtained by the first subtractor 125a by the denominator of the above expression obtained by the second subtractor 125b, and outputs the value as the combustion load command value. The limiter 127 limits the rate of increase or decrease of the combustion load command value by making the change per unit time of the combustion load command value from the second divider 126 a predetermined value.

[0100] In addition, the lower limit of the inlet temperature of the combustion gas in the turbine 21 is set to 700°C and the upper limit is set to 1500°C. However, depending on the model of the burner 31, the lower limit and upper limit of the inlet temperature of the combustion gas in the turbine 21 can be set to values ​​different from the above example.

[0101] The combustion load command value CLCSO, which is output from the combustion load command generator 120, limits the rate of increase or decrease through the limiter 127.

[0102] The fuel flow command value CSO represents the total flow rate of fuel supplied to burner 31 (hereinafter referred to as total fuel flow). Therefore, the fuel flow command generator 130 calculates the total fuel flow rate. Figure 6 As shown, the fuel flow command generator 130 includes a governor controller 131, a load controller 132, a blade passage temperature controller 133, an exhaust temperature controller 134, a low value selector 135, and a limiter 136.

[0103] The governor controller 131 receives the rotational speed N of the gas turbine rotor 28 from the tachometer 71. Then, the governor controller 131 outputs a command value GVCSO to control the total fuel flow rate in a manner that makes the rotational speed N of the gas turbine rotor 28 match a target speed. Specifically, the governor controller 131 compares the measured rotational speed N of the gas turbine rotor 28 with a preset GV setpoint and outputs a proportional control signal as the command value GVCSO.

[0104] The load controller 132 receives the measured output PW from the gas turbine 10 via the output unit 72, the requested output PWr relative to the gas turbine 10 from the host control unit, and the corrected maximum output PWxm from the output corrector 180. The load controller 132 includes a low-value selector 132a and a proportional-integral (PI) arithmetic unit 132b. The low-value selector 132a outputs the smaller of the requested output PWr and the corrected maximum output PWxm as the requested output PWra. Furthermore, as described later, the output corrector 180 updates the corrected maximum output PWxm sequentially, so the low-value selector 132a uses the latest corrected maximum output PWxm. The PI arithmetic unit 132b compares the measured output PW with the requested output PWra, performs a proportional-integral operation, and outputs the result as the command value LDCSO.

[0105] The blade passage temperature controller 133 receives the blade passage temperature Tb from the blade passage thermometer 75. Then, the blade passage temperature controller 133 outputs a command value BPCSO to control the total fuel flow rate in a manner that ensures the blade passage temperature Tb does not exceed an upper limit value. Specifically, the blade passage temperature controller 133 compares the measured blade passage temperature Tb with its upper limit value, performs a proportional-integral calculation, and outputs the result as the command value BPCSO.

[0106] The exhaust temperature controller 134 receives the exhaust temperature Te from the exhaust thermometer 76. Then, the exhaust temperature controller 134 outputs a command value EXCSO to control the total fuel flow rate in a manner that ensures the exhaust temperature Te does not exceed an upper limit value. Specifically, the exhaust temperature controller 134 compares the measured exhaust temperature Te with its upper limit value, performs a proportional-integral calculation, and outputs the result as the command value EXCSO.

[0107] The low-value selector 135 selects the minimum command value from the command values ​​from each controller 131 to 134 and outputs that command value. The limiter 136 limits the increase or decrease rate of the command from the low-value selector 135 and outputs it as the fuel flow command value (total fuel flow command value) CSO.

[0108] As mentioned above, the load factor calculator 140 calculates the load factor (%Load) of the gas turbine 10. The load factor (%Load) is the ratio of the measured output PW to the maximum output used for control. Figure 7As shown, the load rate calculator 140 receives the measured output PW from the output instrument 72, the intake temperature Ti from the intake temperature gauge 73, and the corrected maximum output PWxm from the output corrector 180. The load rate calculator 140 includes a maximum output generator 141, a switch 142, and a divider 143. The maximum output generator 141 has a function F4 representing the relationship between the control maximum output PWxm of the gas turbine 10 and the intake temperature Ti. Figure 17 As shown, function F4 is a function that gradually decreases the maximum control output PWx as the intake air temperature Ti increases. Maximum output generator 141 uses function F4 to calculate the maximum control output PWx corresponding to the intake air temperature Ti. Switcher 142 outputs only one of the maximum output PWx from maximum output generator 141 and the corrected maximum output PWxm from output corrector 180 as the maximum output PWxa. If the corrected maximum output PWxm is input from output corrector 180, switcher 142 outputs that corrected maximum output PWxm as the maximum output PWxa. Furthermore, as described later, output corrector 180 updates the corrected maximum output PWxm sequentially, therefore switcher 142 outputs the latest corrected maximum output PWxm as the maximum output PWxa. Divider 143 divides the measured output PW from output meter 72 by the maximum output PWxa from switcher 142 to calculate the load rate (%Load).

[0109] like Figure 8 As shown, the flow ratio calculator 150 includes a pilot ratio calculator 150p for calculating the pilot ratio PLr and a top cap ratio calculator 150t for calculating the top cap ratio THr. The pilot ratio PLr is the ratio of the pilot fuel flow rate Fpf to the total fuel flow rate. The top cap ratio THr is the ratio of the top cap fuel flow rate Ftf to the total fuel flow rate.

[0110] The lead ratio calculator 150p has a Plor arithmetic unit 151p, a correction value arithmetic unit 152p and a corrector 153p.

[0111] The PLor arithmetic unit 151p has a function F1 relating the combustion load command value CLCSO, which is positively correlated with the inlet temperature of the combustion gas in turbine 21, to the pilot ratio PLor. For example... Figure 12 As shown, function F1 is a function that gradually decreases the pilot ratio PLor as the combustion load command value CLCSO increases, i.e., as the inlet temperature of the combustion gas rises. The PLor calculator 151p receives the combustion load command value CLCSO from the combustion load command generator 120 and uses function F1 to calculate the pilot ratio PLor corresponding to that combustion load command value CLCSO. Furthermore, while function F1 is used here to define the relationship between the combustion load command value CLCSO and the pilot ratio PLor, this relationship can also be defined graphically.

[0112] The correction value calculator 152p has a function G1 (reference) that defines the relationship between the load rate %Load and the correction value Cp. Figure 14 The correction value calculator 152p receives the load rate %Load from the load rate calculator 140 and uses function G1 to calculate the correction value Cp corresponding to the current load rate %Load. Alternatively, function G1 is used here to define the relationship between the load rate %Load and the correction value Cp, but this relationship can also be defined using a graph.

[0113] The function G1 is defined as follows.

[0114] First, when the combustion load command value CLCSO is set constant and the load rate %Load varies, the region where the combustion state becomes unstable is pre-determined through experiments (the region determined by the pilot ratio PLor and the load rate %Load). Next, when the combustion load command value CLCSO is constant, the relationship between the pilot ratio PLor and the load rate %Load that avoids the region where the combustion state becomes unstable is determined. Function G1 represents this relationship.

[0115] The corrector 153p adds the lead ratio PLor from the PLor arithmetic unit 151p to the correction value Cp from the correction value arithmetic unit 152p, and outputs it as the lead ratio PLr. Therefore, the corrector 153p is an adder.

[0116] The top cap calculator 150t has a THor arithmetic unit 151t, a correction value arithmetic unit 152t, and a corrector 153t.

[0117] The THor arithmetic unit 151t has a function F2 relating the combustion load command value CLCSO, which is positively correlated with the inlet temperature of the combustion gas in turbine 21, to the top cap ratio THor. For example... Figure 13 As shown, function F2 is a function that gradually decreases the top cap ratio Thor as the combustion load command value CLCSO increases, i.e., as the inlet temperature of the combustion gas rises. The Thor calculator 151t receives the combustion load command value CLCSO from the combustion load command generator 120 and uses function F2 to calculate the top cap ratio Thor corresponding to that combustion load command value CLCSO. Furthermore, while function F2 is used here to define the relationship between the combustion load command value CLCSO and the top cap ratio Thor, this relationship can also be defined graphically.

[0118] The correction value calculator 152t has a function G2 (reference) that relates the specified load rate %Load to the correction value Ct. Figure 15The correction value calculator 152t receives the load rate %Load from the load rate calculator 140 and uses function G2 to calculate the correction value Ct corresponding to the current load rate %Load. Alternatively, function G2 is used here to define the relationship between the load rate %Load and the correction value Ct, but this relationship can also be defined graphically.

[0119] Similarly, function G2 is determined as follows, just as with function G1.

[0120] First, when the combustion load command value CLCSO is set constant and the load rate %Load varies, the region where the combustion state becomes unstable is pre-determined through experiments (the region determined by the top cap ratio Thor and the load rate %Load). Next, when the combustion load command value CLCSO is constant, the relationship between the top cap ratio Thor and the load rate %Load is determined to avoid the region where the combustion state becomes unstable. Function G2 represents this relationship.

[0121] The corrector 153t adds the top-hat ratio THor from the THor arithmetic unit 151t to the correction value Ct from the correction value arithmetic unit 152t, and outputs it as the top-hat ratio THr. Therefore, the corrector 153t is an adder.

[0122] like Figure 9 As shown, the valve command value generator 155 has a first multiplier 156p, a second multiplier 156t, a first subtractor 156ma, a second subtractor 156mb, a PL valve command value arithmetic unit 157p, an M valve command value arithmetic unit 157m, and a TH valve command value arithmetic unit 157t.

[0123] The first multiplier 156p multiplies the fuel flow command value CSO, which represents the total fuel flow rate, by the pilot ratio PLr to obtain the pilot fuel flow rate Fpf. The PL valve command value calculator 157p calculates the command value for the pilot fuel valve 65 in such a way that the flow rate of the pilot fuel Fp injected from the pilot nozzle 44 becomes the pilot fuel flow rate Fpf.

[0124] The second multiplier 156t multiplies the fuel flow command value CSO, which represents the total fuel flow rate, by the top cap ratio THr to obtain the top cap fuel flow rate Ftf. The TH valve command value calculator 157t calculates the command value for the top cap fuel valve 67 in such a way that the flow rate of the top cap fuel Ft injected from the top cap nozzle 51 becomes the top cap fuel flow rate Ftf.

[0125] The first subtractor 156ma subtracts the top cap fuel flow rate Ftf from the fuel flow command value CSO, which represents the total fuel flow rate. The second subtractor 156mb subtracts the pilot fuel flow rate Fpf from the subtraction result of the first subtractor 156ma, and outputs the result as the main fuel flow rate Fmf to the M valve command value calculator 157m. The M valve command value calculator 157m calculates the command value for the main fuel valve 66 in such a way that the total flow rate of the main fuel Fm injected from the multiple main nozzles 54 becomes the main fuel flow rate Fmf.

[0126] The control signal output unit 190 outputs a control signal containing the command value calculated by the PL valve command value calculator 157p to the pilot fuel valve 65. The control signal output unit 190 outputs a control signal containing the command value calculated by the TH valve command value calculator 157t to the top cap fuel valve 67. The control signal output unit 190 outputs a control signal containing the command value calculated by the M valve command value calculator 157m to the main fuel valve 66.

[0127] like Figure 10 As shown, the maximum output generator 171 of the control output generator 170 includes a temperature receiving unit 172, a change receiving unit 173, a basic maximum output calculation unit 174, a coefficient generation unit 176, and a maximum output correction unit 175.

[0128] Temperature receiving unit 172 receives intake air temperature Ti from intake air thermometer 73. Change receiving unit 173 receives, for example, changes to the maximum opening degree for control in IGV14 from input device 104 such as a keyboard. This change is the relationship between the changed maximum opening degree in IGV14 and the intake air temperature Ti, i.e., the changed relationship.

[0129] The basic maximum output calculation unit 174 has a function F4 that specifies the relationship between the intake air temperature Ti and the maximum output Pwx for controlling the gas turbine. As previously described... Figure 17 As explained, function F4 is a function that controls the maximum output PWx to gradually decrease as the intake air temperature Ti increases. The basic maximum output calculation unit 174 uses function F4 to calculate the basic maximum output PWxb corresponding to the intake air temperature Ti.

[0130] The coefficient generation unit 176 generates a maximum output correction coefficient Kx for correcting the basic maximum output PWxb based on the aforementioned modified relationship and the intake temperature Ti. The coefficient generation unit 176 includes a basic maximum opening calculation unit 176b, a modified maximum opening calculation unit 176c, and a coefficient calculation unit 177.

[0131] The basic maximum opening calculation unit 176b has a function F5 (reference) that defines the relationship between the intake air temperature Ti and the basic maximum opening θb used for control in IGV14. Figure 18The basic maximum opening calculation unit 176b uses function F5 to calculate the basic maximum opening θb for control corresponding to the intake air temperature Ti.

[0132] The modified maximum opening calculation unit 176c has a function F6 (reference) relating the specified intake temperature Ti to the modified maximum opening θc used for control in IGV14. Figure 18 The function F6 defines the aforementioned modified relationship. Therefore, function F6 is received by the modification receiving unit 173. The modified maximum opening calculation unit 176c uses function F6 to calculate the modified maximum opening θc for control corresponding to the intake air temperature Ti. Furthermore, in Figure 18 In the example shown, the aforementioned function F5 is a function whose basic maximum opening θb remains constant relative to changes in intake air temperature Ti. On the other hand, function F6 is a function whose basic maximum opening θb changes relative to changes in intake air temperature Ti.

[0133] The coefficient calculation unit 177 uses the basic maximum opening θb and the modified maximum opening θc to calculate the correction coefficient Kx used to correct the basic maximum output PWxb. This coefficient calculation unit 177 includes a deviation calculation unit 177s and a coefficient calculation unit 177t. The deviation calculation unit 177s calculates the deviation between the basic maximum opening θb and the modified maximum opening θc. Therefore, the deviation calculation unit 177s is a subtractor. The coefficient calculation unit 177t has a function F7 that defines the relationship between this deviation and the correction coefficient Kx. Figure 19 As shown, the function F7 is, for example, a function that gradually increases the correction coefficient Kx as the deviation increases. Furthermore, it is a function such that when the deviation is 0, the correction coefficient Kx becomes 1; when the deviation is negative, the correction coefficient Kx is less than 1; and when the deviation is positive, the correction coefficient Kx is greater than 1. The coefficient calculation unit 177t uses this function F7 to calculate the correction coefficient Kx corresponding to the deviation obtained by the deviation calculation unit 177s.

[0134] The maximum output correction unit 175 uses a correction factor Kx to correct the basic maximum output PWxb and outputs the corrected basic maximum output PWxb as the control maximum output PWx. Specifically, the maximum output correction unit 175 corrects the basic maximum output PWxb by multiplying it by the correction factor Kx. Therefore, the maximum output correction unit 175 is a multiplier.

[0135] Furthermore, the relationships represented by the functions F4, F5, F6, and F7 above can be specified using diagrams.

[0136] As described above, the maximum output PWx generated by the maximum output generator 171 is one type of control output for the gas turbine 10. The maximum output PWx is corrected to a corrected maximum output PWxm by the output corrector 180. The corrected maximum output PWxm is one type of corrected control output for the gas turbine 10.

[0137] like Figure 4 As shown, the output corrector 180 of the control output generator 170 corrects the measured output PW from the gas turbine 10 of the output meter 72 and outputs it as the corrected output PWm. Furthermore, the measured output PW is one type of control output for the gas turbine 10. And the corrected output PWm is one type of corrected control output for the gas turbine 10.

[0138] The IGV command value generator 160 is input with the intake air temperature Ti from the intake air thermometer 73 and the corrected output PWm from the output corrector 180. The IGV command value generator 160 has a function F3 that defines the relationship between the output of the gas turbine 10 and the IGV opening. Figure 16 As shown, function F3 is a function that gradually increases the IGV opening as the output of the gas turbine 10 increases. First, the IGV command value generator 160 corrects the output PWm using the intake air temperature Ti. Next, the IGV command value generator 160 uses function F3 to calculate the IGV opening relative to the corrected output PWm corrected by the intake air temperature Ti. Furthermore, function F3 is used here to define the relationship between the output of the gas turbine 10 and the IGV opening, but this relationship can also be defined graphically. The IGV command value generator 160 outputs the IGV command value IGVc, representing this IGV opening, to the combustion load command generator 120 and the control signal output unit 190. As mentioned above, the combustion load command generator 120 uses the IGV command value IGVc to generate the combustion load command value CLCSO. And, the control signal output unit 190 outputs a control signal containing the IGV command value IGVc output by the IGV command value generator 160 to the IGV14.

[0139] Basically, function F3 is programmed into the control device 100 during its initial setup. Function F3, programmed during this initial setup, is a function set during the design of the gas turbine 10. After the gas turbine 10 is built, a trial run is conducted. Function F3, programmed during the initial setup, is adjusted based on the results of this trial run, for example... Figure 16 The dotted lines indicate that the changes are the most frequent.

[0140] like Figure 11As shown, the output corrector 180 corrects the control output and outputs it as a corrected control output. In this embodiment, as described above, the control outputs include a gas turbine output of 700°C MW, a gas turbine output of 1500°C MW, a measured output Pw, and a maximum output PWx. Therefore, in this embodiment, the corrected control outputs include a corrected 700°C MWm, a corrected 1500°C MWm, a corrected output PWm, and a corrected maximum output PWxm.

[0141] The output corrector 180 includes an output receiving unit 181, an output storage unit 182, a correction coefficient generation unit 183, and an output correction unit 188.

[0142] The output receiving unit 181 receives the reference output PWb, the preceding output PW1, and the current output PW2. The reference output PWb is the output at a past reference time point under the condition that the gas turbine 10 could output its highest output. This reference time point is, for example, the design time point of the gas turbine 10. When the reference output PWb is the design time point of the gas turbine 10, the output receiving unit 181 receives the reference output PWb from an input device 104, such as a keyboard. The preceding output PW1 is the measured output received by the output receiving unit 181 from the output instrument 72 in a preceding time period closer to the current time point than the reference time point (design time point), under the condition that the gas turbine 10 could output its highest output. The preceding time period includes the period of trial operation during which the gas turbine 10 is tested and the period of formal operation after the trial operation. Therefore, the preceding time period includes the construction trial operation period excluding the trial operation after the gas turbine 10 is inspected or repaired. Therefore, the preceding output includes the construction and commissioning period. Under the condition that the gas turbine 10 can output its maximum output, the output received by the output receiving unit 181 from the output instrument 72 is the construction output PWc. The current output PW2 is the current time period from the preceding time period to the present. Under the condition that the gas turbine 10 can output its maximum output, the measured output received by the output receiving unit 181 from the output instrument 72 is the actual output. The current time period also includes the time period during the commissioning of the gas turbine 10 and the time period during formal operation after the commissioning.

[0143] The output receiving unit 181 receives the measured output from the output device 72 only through the time periods described above, and cannot identify whether the measured output is the preceding output PW1, the current output PW2, or the construction output PWc. Therefore, the output receiving unit 181 receives the measured output from the output device 72 and receives information from the input device 104, such as the keyboard, about which time period the measured output belongs to.

[0144] The output storage unit 182 stores the reference output PWb, the preceding output PW1, the current output PW2, and the construction output PWc received by the output receiving unit 181.

[0145] The correction coefficient production unit 183 includes a first coefficient element calculation unit 184a, a second coefficient element calculation unit 184b, a third coefficient element calculation unit 184c, a coefficient element storage unit 185, a reset unit 186, and a correction coefficient calculation unit 187.

[0146] The first coefficient element calculation unit 184a calculates the first coefficient element e1. This first coefficient element e1 is the value of dividing the preceding output PW1 stored in the output storage unit 182 by the reference output PWb stored in the output storage unit 182, that is, the ratio of the preceding output PW1 to the reference output PWb (PW1 / PWb). Therefore, this first coefficient element e1 represents the degree of output degradation during the period from the reference time point to the preceding time period.

[0147] If the first coefficient element calculation unit 184a receives a reset instruction from an input device such as a keyboard 104, it sets the ratio of the current output PW2 stored in the output storage unit 182 to the reference output PWb stored in the output storage unit 182 (PW2 / PWb) as the first coefficient element e1. The reset instruction is sent to the first coefficient element calculation unit 184a from the state where the gas turbine 10 is completely stopped until the start of trial operation.

[0148] The second coefficient element calculation unit 184b calculates the second coefficient element e2. This second coefficient element e2 is the value of dividing the current output PW2 stored in the output storage unit 182 by the preceding output PW1 stored in the output storage unit 182, i.e., the ratio of the current output PW2 to the preceding output PW1 (PW2 / PW1). Therefore, this second coefficient element e2 represents the degree of output degradation during the period from the preceding time period to the current time period.

[0149] The third coefficient element calculation unit 184c calculates the third coefficient element e3. This third coefficient element e3 is the value of dividing the construction output PWc stored in the output storage unit 182 by the reference output PWb stored in the output storage unit 182, that is, the ratio of the construction output PWc to the reference output PWb (PWc / PWb). Therefore, this third coefficient element e3 represents the degree of output degradation during the period from the reference time point to the time period during construction commissioning.

[0150] The coefficient element storage unit 185 has a first coefficient element storage unit 185a that stores the first coefficient element e1, a second coefficient element storage unit 185b that stores the second coefficient element e2, and a third coefficient element storage unit 185c that stores the third coefficient element e3.

[0151] During the period between the complete shutdown of the gas turbine 10 and the start of trial operation, the aforementioned reset instruction is input to the reset unit 186 via an input device 104 such as a keyboard. Upon receiving the reset instruction, the reset unit 186 resets the second coefficient element e2 stored in the second coefficient element storage unit 185b to a value that will not affect the calculation result of the correction coefficient based on the correction coefficient calculation unit 187, which is "1".

[0152] The correction coefficient calculation unit 187 includes a first correction coefficient calculation unit 187a for calculating a first correction coefficient K1 and a second correction coefficient calculation unit 187b for calculating a second correction coefficient K2. The first correction coefficient K1 is a correction coefficient used to correct one type of control output, namely the maximum output PWx, and further used to correct another type of control output, namely 1500℃MW and 700℃MW. The second correction coefficient K2 is a correction coefficient used to correct one type of control output, namely the measured output PW.

[0153] The first correction coefficient calculation unit 187a has a multiplier 187t. The multiplier 187t multiplies the first coefficient element e1 stored in the first coefficient element storage unit 185a by the second coefficient element e2 stored in the second coefficient element storage unit 185b, and outputs the value of the multiplication result as the first correction coefficient K1.

[0154] The second correction coefficient calculation unit 187b includes a divider 187s, a multiplier 187t, and a correction coefficient adjuster 187u. The divider 187s divides the first coefficient element e1 stored in the first coefficient element storage unit 185a by the third coefficient element e3 stored in the third coefficient element storage unit 185c. The multiplier 187t multiplies the value based on the division result of the divider 187s by the second coefficient element e2 stored in the second coefficient element storage unit 185b. The value based on the multiplication result of the multiplier 187t becomes the second correction coefficient K2o before adjustment. The correction coefficient adjuster 187u has a function F8 that defines the relationship between the second correction coefficient K2o before adjustment and the second correction coefficient K2o after adjustment. Figure 20 As shown, function F8 is a function that increases the adjusted second correction factor K2 as the original second correction factor K2o increases. The correction factor adjuster 187u uses function F8 to calculate the adjusted second correction factor K2 corresponding to the original second correction factor K2o. Alternatively, function F5 is used here to define the relationship between the original and adjusted second correction factor K2o, but this relationship can also be defined graphically.

[0155] The second correction coefficient calculation unit 187b calculates the second correction coefficient K2o before adjustment by an operation expressed by the following formula.

[0156] K2o=e1÷e3×e2

[0157] =(PW1 / PWb)÷(PWc / PWb)×(PW2 / PW1)

[0158] In the above calculations, the reference output PWb used in the calculation of the first coefficient element e1 cancels out the reference output PWb used in the calculation of the third coefficient element e3. Therefore, the second correction coefficients K2o and K2 become elements that lose the reference output PWb at the design time point, and the measured output during construction and commissioning, i.e., the construction output PWc, is used as the reference to represent the degree of degradation of the output up to the current time period.

[0159] As mentioned above, the second correction coefficient K2 is used to correct the measured output PW to obtain the corrected output PWm. Furthermore, the IGV instruction value generator 160 uses function F3 to calculate the IGV opening corresponding to this corrected output PWm. For example, using... Figure 16 The explanation provided indicates that function F3 is subject to frequent changes during construction and commissioning. Therefore, the second correction factor K2 used to obtain the IGV opening is set as a value representing the degree of degradation of the output up to the current time period, based on the measured output during construction and commissioning, i.e., the construction output PWc.

[0160] The control output is input not only to the output correction unit 188, but also to the correction coefficient calculation unit 187. Based on the control output, the correction coefficient calculation unit 187 outputs the correction coefficient corresponding to the control output, either the first correction coefficient K1 or the second correction coefficient K2, to the output correction unit 188.

[0161] The output correction unit 188 has a first output correction unit 188a that corrects the maximum output PWx using a first correction coefficient K1, a second output correction unit 188b that corrects MW at 1500℃ and MW at 700℃ using a first correction coefficient K1, and a third output correction unit 188c that corrects the measured output PW using a second correction coefficient K2.

[0162] The first output correction unit 188a includes a multiplier 188t, an adder 188u, a low-value selector 188v, a first storage unit 188x storing the amplitude output of the frequency in the system electrically connected to the generator 29, i.e., the amplitude output FF, and a second storage unit 188y storing the maximum allowable output PWpmax of the generator 29. The multiplier 188t multiplies one of the control outputs, i.e., the maximum output PWx, by a first correction coefficient K1. The adder 188u adds the amplitude output FF stored in the first storage unit 188x to the value based on the multiplication result of the multiplier 188t. The low-value selector 188v outputs the smaller of the value based on the addition result of the adder 188u and the maximum allowable output PWpmax stored in the second storage unit 188y as the corrected maximum output PWxm. Additionally, as... Figure 17 As shown, the maximum allowable output PWpmax is a value that remains unchanged even if the intake air temperature Ti changes. Furthermore, this maximum allowable output PWpmax is less than the maximum control output PWx within the lower temperature range of the intake air temperature Ti, but greater than the maximum control output PWx within other temperature ranges.

[0163] The second output correction unit 188b has a multiplier 188t. The multiplier 188t multiplies one of the control outputs, namely 1500℃MW and 700℃MW, by the first correction coefficient K1 to correct 1500℃MW and 700℃MW, and outputs the correction result as the corrected 1500℃MWm and the corrected 700℃MWm.

[0164] The third output correction unit 188c has a divider 188s. The divider 188s divides one of the control outputs, namely the measured output PW, by the second correction coefficient K2 to correct the measured output PW, and outputs the correction result as the corrected output PWm.

[0165] The control device 100 described above is a computer. For example... Figure 21 As shown, in terms of hardware, the control device 100 includes a CPU (Central Processing Unit) 101 for performing various calculations; a main storage device 102 such as memory that serves as the working area of ​​the CPU 101; an auxiliary storage device 103 such as a hard disk drive; an input device 104 such as a keyboard and mouse; a display device 105; an input / output interface 106 for the input device 104 and the display device 105; a device interface 107; a communication interface 108 for communicating with the outside world via a network N; and a storage and playback device 109 for storing, processing, and playing back data on a disk-type storage medium D.

[0166] The device interface 107 is connected via signal lines to the previously described detectors 71-76, fuel valves 65-67, and IGV14.

[0167] The auxiliary storage device 103 pre-stores a control program 103p, etc. The control program 103p includes a control output creation program 103pa. The control output creation program 103pa includes a maximum output creation program 103paa and an output correction program 103pab. The control program 103p is read into the auxiliary storage device 103 from the disk-type storage medium D, for example, via the storage / playback device 109. Alternatively, the control program 103p can be read into the auxiliary storage device 103 from an external device via the communication interface 108.

[0168] use Figures 4 to 11 Each functional element of the control device 100 described herein operates by the CPU 101 executing the control program 103p stored in the auxiliary storage device 103. Specifically, the control output generator 170 of the control device 100 operates by the CPU 101 executing the control output generation program 103pa stored in the control program 103p in the auxiliary storage device 103. Furthermore, the maximum output generator 171 of the control device 100 operates by the CPU 101 executing the maximum output generation program 103paa within the control output generation program 103pa. Finally, the output corrector 180 of the control device 100 operates by the CPU 101 executing the output correction program 103pab within the control output generation program 103pa.

[0169] Next, according to Figure 22 The flowchart shown illustrates the sequence of actions of the maximum output generator 171 described above.

[0170] The temperature receiving unit 172 of the maximum output generator 171 receives the intake air temperature Ti from the intake air thermometer 73 (temperature receiving process S1). Furthermore, the change receiving unit 173 of the maximum output generator 171 receives the change content, i.e., function F6, for the control maximum opening in the IGV14 from the input device 104 such as the keyboard (change receiving process S2).

[0171] The basic maximum output arithmetic unit 174 of the maximum output generator 171 is used. Figure 18 The function F5 shown calculates the basic maximum opening θb for control corresponding to the intake air temperature Ti (basic maximum output calculation step S3).

[0172] The coefficient generation unit 176 of the maximum output generator 171 uses the intake air temperature Ti to generate a maximum output correction coefficient Kx for correcting the basic maximum output PWxb (coefficient generation process S4). In this coefficient generation process S4, the basic maximum opening calculation process S5, the modified maximum opening calculation process S6, and the coefficient calculation process S7 are performed.

[0173] In the basic maximum opening calculation process S5, the basic maximum opening calculation unit 176b uses function F5 (reference). Figure 18 The basic maximum opening θb corresponding to the intake air temperature Ti is calculated. In the modified maximum opening calculation step S6, the modified maximum opening calculation unit 176c uses the function F6 (refer to) representing the modification details. Figure 18 ) Calculate the maximum control opening θc corresponding to the intake air temperature Ti after the change.

[0174] In the coefficient calculation step S7, the correction coefficient Kx used to correct the basic maximum output PWxb is calculated. In this coefficient calculation step S7, the deviation calculation step S7s and the coefficient calculation step S7t are performed. In the deviation calculation step S7s, the deviation calculation unit 177s calculates the deviation between the basic maximum opening θb and the changed maximum opening θc. In the coefficient calculation step S7t, the coefficient calculation unit 177t uses... Figure 19 The function F7 shown calculates the correction coefficient Kx corresponding to the deviation obtained by the deviation calculation unit 177s.

[0175] The maximum output correction unit 175 of the maximum output generator 171 uses the correction coefficient Kx to correct the basic maximum output PWxb, and outputs the corrected basic maximum output PWxb as the control maximum output PWx (maximum output correction process S8).

[0176] The creation of the maximum output PWx based on the maximum output generator 171 is now complete. Furthermore, the above actions are performed each time the receiving unit 173 receives a change in the maximum opening.

[0177] Next, according to Figure 23 and Figure 24 The flowchart shown illustrates the sequence of operations of the output corrector 180 described above.

[0178] Figure 23The flowchart shown is a flowchart of the output receiving routine executed by the output corrector 180. In the output receiving routine, the output receiving unit 181 receives output from an input device 104 such as a keyboard or an output device 72 (output receiving process S11). The output storage unit 182 stores the output (output storage process S12). In the output receiving routine, by repeatedly executing the output receiving process S11 and the output storage process S12, the reference output PWb, the construction output PWc, the preceding output PW1 (excluding the construction output PWc), and the current output PW2 are stored in the output storage unit 182. Once the reference output PWb and the construction output PWc are stored in the output storage unit 182, they will not be updated later. On the other hand, the preceding output PW1 (excluding the construction output PWc) and the current output PW2 will be updated sequentially even if they are stored in the output storage unit 182.

[0179] Figure 24 The flowchart shown is a flowchart of the correction routine executed by the output corrector 180. In this correction routine, the correction coefficient generation step S20 and the output correction step S25 are repeatedly executed.

[0180] The correction coefficient production process S20 includes the first coefficient element calculation process S21a, the second coefficient element calculation process S21b, the third coefficient element calculation process S21c, the coefficient element storage process S22, the reset process S23, and the correction coefficient calculation process S24.

[0181] In the first coefficient element calculation process S21a, the first coefficient element calculation unit 184a divides the preceding output PW1 stored in the output storage unit 182 by the reference output PWb stored in the output storage unit 182 to obtain the first coefficient element e1 (=PW1 / PWb). However, if the first coefficient element calculation unit 184a receives a reset instruction from an input device 104 such as a keyboard, it divides the current output PW2 stored in the output storage unit 182 by the reference output PWb stored in the output storage unit 182 to obtain the first coefficient element e1 (=PW2 / PWb).

[0182] In the second coefficient element calculation process S21b, the second coefficient element calculation unit 184b divides the current output PW2 stored in the output storage unit 182 by the preceding output PW1 stored in the output storage unit 182 to obtain the second coefficient element e2 (=PW2 / PW1).

[0183] In the third coefficient element calculation process S21c, the third coefficient element calculation unit 184c divides the construction output PWc stored in the output storage unit 182 by the reference output PWb stored in the output storage unit 182 to obtain the third coefficient element e3 (=PWc / PWb).

[0184] Furthermore, the coefficient element calculation processes S21a, S21b, and S21c are generally not executed at the same time as each other. The coefficient element calculation processes S21a, S21b, and S21c are executed each time the output used in the coefficient element calculation processes S21a, S21b, and S21c is stored in the output storage unit 182.

[0185] The coefficient element storage process S22 includes a first coefficient element storage process S22a, a second coefficient element storage process S22b, and a third coefficient element storage process S22c.

[0186] In the first coefficient element storage process S22a, the first coefficient element storage unit 185a stores the first coefficient element e1 calculated in the first coefficient element calculation process S21a.

[0187] In the second coefficient element storage process S22b, the second coefficient element storage unit 185b stores the second coefficient element e2 calculated in the second coefficient element calculation process S21b.

[0188] In the third coefficient element storage process S22c, the third coefficient element storage unit 185c stores the third coefficient element e3 calculated in the third coefficient element calculation process S21c.

[0189] The reset process S23 includes a receiving judgment process S23a and a reset execution process S23b. In the receiving judgment process S23a, it is determined whether the reset unit 186 has received a reset instruction from the input device 104 such as the keyboard. If it is determined that the reset unit 186 has received a reset instruction, the reset execution process S23b is executed. In the reset execution process S23b, the reset unit 186 resets the second coefficient element e2 stored in the second coefficient element storage unit 185b to a value that will not affect the calculation result of the correction coefficient based on the correction coefficient calculation unit 187, which is "1". In addition, the first coefficient element calculation unit 184a receives the reset instruction at the moment when the reset unit 186 receives the reset instruction. As a result, as described above, the first coefficient element calculation unit 184a sets the value of the current output PW2 divided by the reference output PWb as the first coefficient element e1 (=PW2 / PWb). This first coefficient element e1 is stored in the first coefficient element storage unit 185a.

[0190] The correction coefficient calculation process S24 includes a first correction coefficient calculation process S24a and a second correction coefficient calculation process S24b.

[0191] In the first correction coefficient calculation step S24a, the first correction coefficient calculation unit 187a calculates the first correction coefficient K1. In the second correction coefficient calculation step S24b, the second correction coefficient calculation unit 187b calculates the second correction coefficient K2.

[0192] In the output correction process S25, the output correction unit 188 corrects the control output using a correction coefficient and outputs the correction result as a corrected control output. At this time, the output correction unit 188 corrects the control output using a correction coefficient from among multiple correction coefficients calculated by the correction coefficient calculation unit 187 that corresponds to the control output to be corrected. Specifically, in the output correction process S25, as described above, the first output correction unit 188a of the output correction unit 188 uses a first correction coefficient K1, the amplitude output FF stored in the first storage unit 188x, and the maximum allowable output PWpmax stored in the second storage unit 188y to correct the maximum output PWx, and outputs the correction result as a corrected maximum output PWxm. Furthermore, in the output correction process S25, as described above, the second output correction unit 188b of the output correction unit 188 uses the first correction coefficient K1 to correct 1500℃MW and 700℃MW respectively, and outputs the correction result as a corrected 1500℃MWm and a corrected 700℃MWm. Furthermore, in the output correction process S25, the third output correction unit 188c of the output correction unit 188 uses the second correction coefficient K2 to correct the measured output PW, and outputs the correction result as the corrected output PWm.

[0193] Next, refer to Figure 25 The changes of each coefficient element, each correction coefficient, and each correction control output over time are explained.

[0194] Here, assuming,

[0195] Set the baseline output PWb of the baseline time point (planned time point) to 100MW.

[0196] During the construction and commissioning, the measured output PWc received by the output receiver 181 from the output instrument 72, under the condition that the gas turbine 10 can output the highest output, will be set to 90MW.

[0197] In the first formal operation thereafter, the measured output received by the output receiver 181 from the output instrument 72 will be set to 80MW under the condition that the gas turbine 10 is able to output the highest output.

[0198] In the second formal operation thereafter, the measured output received by the output receiver 181 from the output instrument 72 will be set to 70MW under the condition that the gas turbine 10 is able to output the highest output.

[0199] If the second one is officially in operation, the gas turbine 10 has undergone regular maintenance.

[0200] During the trial run following this periodic maintenance, the measured output received by the output receiver 181 from the output instrument 72 under the condition that the gas turbine 10 can output its maximum output is set to 80MW. Therefore, as a result of the periodic maintenance, the measured output (80MW) is greater than the measured output (70MW) during the second formal operation before the periodic maintenance.

[0201] In the first formal operation thereafter, the measured output received by the output receiver 181 from the output instrument 72 will be set to 70MW under the condition that the gas turbine 10 is able to output the highest output.

[0202] In the second formal operation thereafter, the measured output received by the output receiver 181 from the output instrument 72 will be set to 65MW under the condition that the gas turbine 10 is able to output the highest output.

[0203] Before the start of the construction trial run, the correction coefficient generation unit 183 receives a reset instruction. Therefore, during the construction trial run, the first coefficient element calculation unit 184a sets the value of the current output PW2 divided by the reference output PWb as the first coefficient element e1 (=PW2 / PWb). Therefore, the first coefficient element e1 becomes 9 / 10 (=90 / 100), and this first coefficient element e1 is stored in the first coefficient element storage unit 185a. Furthermore, during the construction trial run, the second coefficient element storage unit 185b stores "1" as the second coefficient element e2 through the operation of the reset unit 186. Furthermore, during the construction trial run, the third coefficient element calculation unit 184c sets the value of the construction output PWc divided by the reference output PWb as the third coefficient element e3 (=PWc / PWb). Therefore, the third coefficient element e3 becomes 9 / 10 (=90 / 100), and this third coefficient element e3 is stored in the third coefficient element storage unit 185c. The third coefficient element e3 stored in the third coefficient element storage section 185c will not be updated thereafter.

[0204] As described above, by determining the results of each coefficient element during the construction trial run, each correction coefficient during the construction trial run can be calculated. During the construction trial run, for example, the first correction coefficient K1 (e1×e2) becomes 0.9 (=9 / 10×1). Furthermore, the second correction coefficient K2 (e1×e2÷e3) becomes 1.0 (=9 / 10×1÷9 / 10). For simplicity, the values ​​of this second correction coefficient K2 and the second correction coefficient K2 described below are set to values ​​without adjustment based on the coefficients of the correction coefficient adjuster 187u.

[0205] Therefore, during construction and commissioning, when one of the control outputs, i.e., 1500℃MW, is 100MW, the corrected 1500℃MWm calculated using the first correction factor K1 becomes 90MW (=100×0.9). Furthermore, when one of the control outputs, i.e., the measured output PW, is 90MW, the corrected output PWm calculated using the second correction factor K2 becomes 90MW (90÷1.0).

[0206] In the first formal operation following the construction trial run, unlike in the construction trial run, the first coefficient element calculation unit 184a sets the value of dividing the preceding output PW1 by the reference output PWb as the first coefficient element e1 (=PW2 / PWb). Therefore, the first coefficient element e1 becomes 9 / 10 (=90 / 100), and this first coefficient element e1 is stored in the first coefficient element storage unit 185a. In this first formal operation, the second coefficient element calculation unit 184b sets the value of dividing the current output PW2 by the preceding output PW1 as the second coefficient element e2 (=PW2 / PW1). Therefore, the second coefficient element e2 becomes 8 / 9 (=80 / 90), and this second coefficient element e2 is stored in the second coefficient element storage unit 185b. In addition, as mentioned above, the third coefficient element e3 stored in the third coefficient element storage unit 185c remains unchanged even after the transition from the construction trial run to the first formal operation.

[0207] As described above, having determined the results of each coefficient element in the first formal run, the correction coefficients for the first formal run can be calculated. In the first formal run, the first correction coefficient K1 (e1×e2) becomes 0.8 (=9 / 10×8 / 9). Furthermore, the second correction coefficient K2 (e1×e2÷e3) becomes 0.89 (=9 / 10×8 / 9÷9 / 10).

[0208] Therefore, in the first formal operation, when one of the control outputs, i.e., 1500℃MW, is 100MW, the corrected 1500℃MWm calculated using the first correction factor K1 becomes 80MW (=100×0.8). Furthermore, when one of the control outputs, i.e., the measured output PW, is 80MW, the corrected output PWm calculated using the second correction factor K2 becomes 90MW (80÷0.89).

[0209] In the second formal run following the first formal run, the first coefficient element calculation unit 184a and the second coefficient element calculation unit 184b calculate the coefficient elements in the same manner as in the first formal run. Therefore, the first coefficient element e1 (=PW2 / PWb) becomes 8 / 10 (=80 / 100), and this first coefficient element e1 is stored in the first coefficient element storage unit 185a. Furthermore, the second coefficient element e2 (=PW2 / PW1) becomes 7 / 8 (=70 / 80), and this second coefficient element e2 is stored in the second coefficient element storage unit 185b.

[0210] As described above, having determined the results of each coefficient element in the second formal run, the correction coefficients for the second formal run can be calculated. In the second formal run, the first correction coefficient K1 (e1×e2) becomes 0.7 (=8 / 10×7 / 8). Furthermore, the second correction coefficient K2 (e1×e2÷e3) becomes 0.78 (=8 / 10×7 / 8÷9 / 10).

[0211] Therefore, in the second formal operation, when one of the control outputs, i.e., 1500℃MW, is 100MW, the corrected 1500℃MWm calculated using the first correction factor K1 becomes 70MW (=100×0.7). Furthermore, when one of the control outputs, i.e., the measured output PW, is 70MW, the corrected output PWm calculated using the second correction factor K2 becomes 90MW (70÷0.78).

[0212] As mentioned above, once the second phase of formal operation is completed, a scheduled maintenance will be performed.

[0213] Before the trial run following the start of the scheduled maintenance, the calibration coefficient generation unit 183 receives a reset instruction. Therefore, during the trial run after the scheduled maintenance, the first coefficient element calculation unit 184a sets the value of the current output PW2 divided by the reference output PWb as the first coefficient element e1 (=PW2 / PWb). Thus, the first coefficient element e1 becomes 8 / 10 (=80 / 100), and this first coefficient element e1 is stored in the first coefficient element storage unit 185a. Furthermore, during this trial run, the second coefficient element storage unit 185b stores "1" as the second coefficient element e2 through the operation of the reset unit 186.

[0214] As described above, having determined the results of each coefficient element in this trial run, the correction coefficients for this trial run can be calculated. In the trial run, the first correction coefficient K1 (e1×e2) becomes 0.8 (=80 / 10×1). Furthermore, the second correction coefficient K2 (e1×e2÷e3) becomes 0.89 (=8 / 10×1÷9 / 10).

[0215] Therefore, during trial operation, when one of the control outputs, i.e., 1500℃ MW, is 100MW, the corrected 1500℃ MWm calculated using the first correction factor K1 becomes 80MW (=100×0.8). Furthermore, when one of the control outputs, i.e., the measured output PW, is 70MW, the corrected output PWm calculated using the second correction factor K2 becomes 79MW (70÷0.89).

[0216] In the first formal run following the previous trial run, unlike in the previous trial run, the first coefficient element calculation unit 184a sets the value of dividing the preceding output PW1 by the reference output PWb as the first coefficient element e1 (=PW2 / PWb). Therefore, the first coefficient element e1 becomes 8 / 10 (=80 / 100), and this first coefficient element e1 is stored in the first coefficient element storage unit 185a. In this first formal run, the second coefficient element calculation unit 184b sets the value of dividing the current output PW2 by the preceding output PW1 as the second coefficient element e2 (=PW2 / PW1). Therefore, the second coefficient element e2 becomes 7 / 8 (=70 / 80), and this second coefficient element e2 is stored in the second coefficient element storage unit 185b.

[0217] As described above, having determined the results of each coefficient element in the first formal run, the correction coefficients for the first formal run can be calculated. In the first formal run, the first correction coefficient K1 (e1×e2) becomes 0.7 (=8 / 10×7 / 8). Furthermore, the second correction coefficient K2 (e1×e2÷e3) becomes 0.78 (=8 / 10×7 / 8÷9 / 10).

[0218] Therefore, in the first formal operation, when one of the control outputs, i.e., 1500℃MW, is 100MW, the corrected 1500℃MWm calculated using the first correction factor K1 becomes 70MW (=100×0.7). Furthermore, when one of the control outputs, i.e., the measured output PW, is 70MW, the corrected output PWm calculated using the second correction factor K2 becomes 90MW (70÷0.78).

[0219] In the second formal run following the first formal run, the first coefficient element calculation unit 184a and the second coefficient element calculation unit 184b calculate the coefficient elements in the same manner as in the first formal run. Therefore, the first coefficient element e1 (=PW2 / PWb) becomes 7 / 10 (=70 / 100). And the second coefficient element e2 (=PW2 / PW1) becomes 6.5 / 7 (=65 / 70).

[0220] In the second formal operation, the first correction factor K1 (e1×e2) becomes 0.65 (=7 / 10×65 / 70). Furthermore, the second correction factor K2 (e1×e2÷e3) becomes 0.72 (=7 / 10×65 / 70÷9 / 10). Also, when one of the control outputs, i.e., 1500℃ MW, is 100MW, the corrected 1500℃ MWm calculated using the first correction factor K1 becomes 65MW (=100×0.65). Furthermore, when one of the control outputs, i.e., the measured output PW, is 65MW, the corrected output PWm calculated using the second correction factor K2 becomes 90MW (65÷0.72).

[0221] As described above, the output corrector 180 of the control device 100 corrects the control output according to the degree of degradation of the output accompanying the deterioration of the gas turbine performance.

[0222] If the first coefficient element calculation unit 184a in this embodiment receives a reset instruction during the period from the complete shutdown of the gas turbine 10 to the start of the trial operation, then as explained above, during the trial operation, the first coefficient element e1 is calculated using the current output PW2 of the current time period instead of the preceding output PW1 of the preceding time period. Furthermore, if the reset unit 186 in this embodiment receives a reset instruction during the period from the complete shutdown of the gas turbine 10 to the start of the trial operation, then the second coefficient element e2 stored in the coefficient element storage unit 185 is reset to a value that will not affect the calculation result of the correction coefficient based on the correction coefficient calculation unit 187, specifically, reset to "1".

[0223] If the gas turbine performance is improved through periodic maintenance performed before trial operation, even if the first coefficient element e1 and the second coefficient element e2 are calculated using the output PW1 of the preceding time period before trial operation, these first coefficient elements e1 and the second coefficient element e2 will not properly represent the degree of output degradation. Therefore, as mentioned above, if the first coefficient element calculation unit 184a in this embodiment receives a reset instruction, it calculates the first coefficient element e1 using the current output PW2 of the current time period. Moreover, if the reset unit 186 in this embodiment receives a reset instruction, it resets the second coefficient element e2 stored in the coefficient element storage unit 185 to a value that will not affect the calculation result based on the correction coefficient of the correction coefficient calculation unit 187.

[0224] Therefore, in this embodiment, even when a trial run begins from a state where the gas turbine 10 has been completely stopped, a corrective control output that appropriately reflects the degree of output degradation can be obtained.

[0225] Next, according to Figure 26 The flowchart shown illustrates the overall operation of the control device 100.

[0226] As explained above, the control output generator 170 of the control device 100 generates a control output (control output generation process S30). In this control output generation process S30, the maximum output generation process S31 and the output correction process S32 are performed.

[0227] As explained above, in the maximum output production process S31, if the maximum output generator 171 receives a change in the maximum opening for control from the IGV14, it produces the maximum output for control PWx corresponding to the change.

[0228] As explained above, in the output correction process S32, the output corrector 180 corrects the control output based on the degree of degradation of the output accompanying the deterioration of the gas turbine performance. As a result, in this embodiment, the corrected control output PWm, the corrected 1500°C MWm, the corrected 700°C MWm, and the corrected maximum output PWxm are obtained as the corrected control output.

[0229] The command value generation unit 110 of the control device 100 uses the corrected control output obtained by executing the output correction process S32 to generate command values ​​for the control object of the gas turbine 10 (command value generation process S33).

[0230] Specifically, the combustion load command generator 120 generates the combustion load command CLCSO using corrections of 1500℃ MWm and 700℃ MWm. The fuel flow command generator 130 generates the fuel flow command value (total fuel flow command value) CSO using corrections of the maximum output PWxm, etc. The load rate calculator 140 calculates the load rate (%Load) using corrections of the maximum output PWxm and the measured output PW. The flow ratio calculator 150 calculates the pilot ratio PLr and the cap ratio THr using the combustion load command CLCSO and the load rate (%Load). The valve command value generator 155 generates command values ​​for each fuel valve 65, 66, and 67 using the pilot ratio PLr and cap ratio THr from the flow ratio calculator 150 and the total fuel flow represented by the CSO from the fuel flow command generator 130. The IGV command value generator 160 generates the IGV command value IGVc using corrections of the output PWm.

[0231] The control signal output unit 190 of the control device 100 outputs a control signal representing a command value to the controlled object (control signal output process S34). Based on the command value of each of the multiple fuel valves 65, 66, and 67 generated by the valve command value generator 155, the control signal output unit 190 generates a control signal for each of the multiple fuel valves 65, 66, and 67, and outputs each control signal to any one of the fuel valves 65, 66, and 67. Furthermore, the control signal output unit 190 generates a control signal based on the IGV command value IGVc generated by the IGV command value generator 160, and outputs this control signal to the IGV14.

[0232] As described above, in this embodiment, changes to the maximum opening degree in the IGV14 can be received. Furthermore, in this embodiment, the maximum output for gas turbine control is adjusted based on these changes and the intake air temperature. Therefore, in this embodiment, even when the maximum opening degree setting is changed, it does not lead to a shortened gas turbine lifespan or a reduction in output, thereby suppressing gas turbine control malfunctions.

[0233] Furthermore, in this embodiment, the control output is corrected based on the degree of degradation of the output accompanying the deterioration of the gas turbine performance. Therefore, in this embodiment, even if the gas turbine performance deteriorates, poor control can be suppressed.

[0234] In this embodiment, a correction coefficient is obtained using multiple coefficient elements e1, e2, and e3. This correction coefficient represents the degree of output degradation accompanying gas turbine performance deterioration. Furthermore, each of the multiple coefficient elements e1, e2, and e3 represents the degree of output degradation accompanying gas turbine performance deterioration. However, these multiple coefficient elements e1, e2, and e3 represent the degree of output degradation over different time periods. In this embodiment, the correction coefficient is obtained using multiple different coefficient elements e1, e2, and e3, and this correction coefficient is used to correct the control output. Therefore, in this embodiment, a corrected control output that appropriately reflects the degree of output degradation can be obtained.

[0235] "Variations"

[0236] Such as using Figure 10 As explained above, the coefficient calculation unit 177 of the maximum output generator 171 includes a deviation calculation unit 177s for calculating the deviation between the basic maximum opening θb and the modified maximum opening θc, and a coefficient calculation unit 177t for calculating the correction coefficient Kx corresponding to the deviation obtained by the deviation calculation unit 177s. However, the correction coefficient Kx can be obtained by this coefficient calculation unit in another way.

[0237] Specifically, such as Figure 27 As shown, the coefficient calculation unit 177a of the maximum output generator 171a may include a basic output calculation unit 177u, a modified output calculation unit 177v, and a coefficient calculation unit 177w. This coefficient calculation unit 177a performs... Figure 28 The flowchart shown includes the coefficient calculation process S7a. The basic output calculation unit 177u has... Figure 16 The function F3 is shown, and the output corresponding to the basic maximum opening θb obtained by the basic maximum opening calculation unit 176b is calculated using the function F3 (basic output calculation process S7u). The modified output calculation unit 177v also has Figure 16The function F3 is shown, and the output corresponding to the modified maximum opening θc obtained by the modified maximum opening calculation unit 176c is calculated using the function F3 (modified output calculation step S7v). The coefficient calculation unit 177w outputs the ratio of the output calculated by the modified output calculation unit 177v to the output calculated by the basic output calculation unit 177u as a correction coefficient Kx. That is, the coefficient calculation unit 177w outputs the result of the division obtained by dividing the output calculated by the modified output calculation unit 177v by the output calculated by the basic output calculation unit 177u as the correction coefficient Kx (coefficient calculation step S7w).

[0238] The gas turbine equipment described above is sometimes assembled in combined cycle systems. For example... Figure 29 As shown, in addition to the gas turbine unit 1, the combined cycle unit also includes a flue 2, a switching baffle 3, a waste heat recovery boiler 4, a steam turbine 5, a steam turbine generator 6, a condenser 7, a pump 8, a first chimney 9a, and a second chimney 9b.

[0239] As described above, the gas turbine unit 1 includes a gas turbine 10, a gas turbine generator 29 that generates electricity by driving the gas turbine 10, and a control device 100 that controls the controlled objects in the gas turbine 10. The flue 2 has a main flue 2m from which exhaust gas EG flows from the gas turbine 10, and a first flue 2a and a second flue 2b branching from the main flue 2m. A switching baffle 3 is provided at the branching points of the first flue 2a and the second flue 2b from the main flue 2m. This switching baffle 3 directs the exhaust gas EG flowing from the main flue 2m to either the first flue 2a or the second flue 2b. A waste heat recovery boiler 4 is connected to the first flue 2a. This waste heat recovery boiler 4 uses the heat from the exhaust gas EG flowing through the main flue 2m and the first flue 2a to generate steam. The steam from the waste heat recovery boiler 4 drives a steam turbine 5. A steam turbine generator 6 generates electricity by driving the steam turbine 5. A condenser 7 restores the steam discharged from the steam turbine 5 to water. Pump 8 delivers water from condenser 7 to waste heat recovery boiler 4. First chimney 9a is connected to waste heat recovery boiler 4. Second chimney 9b is connected to second flue 2b.

[0240] The combined cycle unit operates in two modes: a combined cycle mode and a simple cycle mode. In the combined cycle mode, the gas turbine 10 drives the gas turbine generator 29 to generate electricity. Furthermore, in this combined cycle mode, exhaust gas EG from the gas turbine 10 is directed to the waste heat recovery boiler 4 via the main flue 2m and the first flue 2a. Steam from the waste heat recovery boiler 4 drives the steam turbine 5 to generate electricity based on the steam turbine generator 6. In other words, the combined cycle mode generates electricity based on both the gas turbine generator 29 and the steam turbine generator 6. In the simple cycle mode, the gas turbine 10 drives the gas turbine generator 29 to generate electricity. However, in this simple cycle mode, instead of directing exhaust gas EG from the gas turbine 10 to the waste heat recovery boiler 4, it is discharged from the second chimney 9b via the main flue 2m and the second flue 2b. In other words, the simple cycle mode generates electricity only based on the gas turbine generator 29, without the steam turbine generator 6.

[0241] The pressure loss of the exhaust gas EG in combined cycle mode differs from that in simple cycle mode. In simple cycle mode, the exhaust gas EG from gas turbine 10 is discharged from second chimney 9b via main flue 2m and second flue 2b. In combined cycle mode, the exhaust gas EG from gas turbine 10 is discharged from first chimney 9a via main flue 2m, first flue 2a, and waste heat recovery boiler 4. Therefore, in combined cycle mode, the resistance experienced by the exhaust gas EG from gas turbine 10 until it is discharged from first chimney 9a is greater than in simple cycle mode. Consequently, the pressure loss of the exhaust gas EG in combined cycle mode is greater than that in simple cycle mode. In other words, the pressure loss of the exhaust gas EG in simple cycle mode is less than that in combined cycle mode.

[0242] If the intake pressure is the same when both modes are executed, the mode with lower exhaust gas pressure (EG) at the gas turbine outlet results in a larger pressure drop within the gas turbine 10, thus increasing the gas turbine output. As explained above, the pressure loss of the exhaust gas pressure (EG) in the simple cycle mode is less than that in the combined cycle mode. Therefore, the pressure of the exhaust gas pressure (EG) at the gas turbine outlet is lower in the simple cycle mode compared to the combined cycle mode. Consequently, the gas turbine output is higher in the simple cycle mode compared to the combined cycle mode.

[0243] As mentioned above, the gas turbine output when executing the combined cycle mode is different from that when executing the simple cycle mode. Therefore, when switching modes, it is preferable to change the maximum output for control.

[0244] Therefore, as Figure 30 As shown, in the maximum output generator 171b of the control device 100 of the combined cycle equipment, preferably in Figure 10 The maximum output generator shown is 171 or Figure 27 The maximum output generator 171a shown includes an additional mode correspondence coefficient generation unit 178 and a mode correspondence correction unit 179.

[0245] The mode-corresponding coefficient generation unit 178 has coefficients for executing the combined cycle mode and coefficients for executing the simple cycle mode. If the function F4 of the basic maximum output calculation unit 174 specifies the relationship between the intake air temperature Ti and the maximum control output Pwx of the gas turbine when executing the combined cycle mode, for example, the coefficient for executing the combined cycle mode is set to 1.0, and the coefficient for executing the simple cycle mode is set to 1.1. If an input device 104 such as a keyboard instructs the user to execute either the combined cycle mode or the simple cycle mode, the mode-corresponding coefficient generation unit 178 outputs the coefficient corresponding to the instructing mode.

[0246] The mode correspondence correction unit 179 multiplies the basic maximum output PWxb from the basic maximum output calculation unit 174 by a coefficient from the mode correspondence coefficient generation unit 178 to correct the basic maximum output PWxb, and outputs it as the basic maximum output PWxba. The maximum output correction unit 175 corrects the basic maximum output PWxba using the correction coefficient Kx.

[0247] As described above, by correcting the basic maximum output PWxb in conjunction with mode changes in the combined cycle device, it is possible to suppress control malfunctions based on mode changes.

[0248] In the above embodiments, examples of control outputs that are to be corrected include measured output PW, 1500℃MW, 700℃MW, and maximum output PWx. However, other control outputs can be set as control outputs that are to be corrected.

[0249] In the above embodiments, the measured output PW is shown as an example of the control output that is corrected using the second correction factor K2. However, when the relationship between the corrected control output and the command value changes during construction and commissioning, the control output other than the measured output PW can be corrected using the second correction factor K2, and the corrected control output can be obtained.

[0250] Postscript

[0251] For example, the maximum output generator 171 of the gas turbine 10 in the above embodiments can be understood as follows.

[0252] (1) The maximum output generator of the gas turbine 10 in the first method is the maximum output generator 171 of the gas turbine 10, wherein,

[0253] The gas turbine 10 includes a compressor 11 capable of compressing air to generate compressed air, a burner 31 capable of burning fuel in the compressed air to generate combustion gas, and a turbine 21 capable of being driven by the combustion gas. The compressor 11 has an intake flow regulator 14 for regulating the flow rate of the air it draws in.

[0254] The maximum output generator 171 includes: a temperature receiving unit 172 that receives the temperature of the air drawn in by the compressor 11, i.e., the intake air temperature; a change receiving unit 173 that receives changes in the maximum opening of the intake air volume regulator 14; a basic maximum output calculation unit 174 that calculates the basic maximum output PWxb of the gas turbine 10 based on the intake air temperature received by the temperature receiving unit 172; coefficient generating units 176 and 176a that generate a maximum output correction coefficient Kx for correcting the basic maximum output PWxb based on the changes in the maximum opening received by the change receiving unit 173 and the intake air temperature received by the temperature receiving unit 172; and a maximum output correction unit 175 that corrects the basic maximum output PWxb using the maximum output correction coefficient Kx and outputs the corrected basic maximum output PWxb as the control maximum output PWx.

[0255] In this method, changes to the maximum opening of the intake air volume regulator 14 can be received. Furthermore, in this method, the maximum output for controlling the gas turbine 10 is corrected based on these changes and the intake air temperature. Therefore, in this method, even if the setting of the maximum opening for control is changed, the lifespan of the gas turbine 10 will not be shortened or the output reduced, thereby suppressing malfunctions in the control of the gas turbine 10.

[0256] (2) In the maximum output generator of the gas turbine 10 in the second method, the change receiving unit 173 receives the relationship between the changed maximum opening degree and the intake temperature in the intake volume regulator 14, i.e., the changed relationship F6.

[0257] The coefficient generation unit 176 includes: a basic maximum opening calculation unit 176b, which uses a predetermined relationship F5 between the basic maximum opening in the intake volume regulator 14 and the intake temperature to calculate the basic maximum opening corresponding to the intake temperature received by the temperature receiving unit 172; a modified maximum opening calculation unit 176c, which uses the modified relationship F6 received by the modified receiving unit 173 to calculate the modified maximum opening corresponding to the intake temperature received by the temperature receiving unit 172; and coefficient calculation units 177 and 177a, which use the basic maximum opening calculated by the basic maximum opening calculation unit 176b and the modified maximum opening calculated by the modified maximum opening calculation unit 176c to calculate the maximum output correction coefficient Kx.

[0258] (3) In the maximum output generator of the gas turbine 10 in the third embodiment, the coefficient calculation unit 177 of the gas turbine 10 in the second embodiment includes: a deviation calculation unit 177s, which calculates the deviation between the basic maximum opening obtained by the basic maximum opening calculation unit 176b and the modified maximum opening obtained by the modified maximum opening calculation unit 176c; and a coefficient calculation unit 177t, which calculates the maximum output correction coefficient Kx corresponding to the deviation calculated by the deviation calculation unit 177s using a predetermined relationship between the deviation and the maximum output correction coefficient.

[0259] (4) In the maximum output generator of the gas turbine 10 in the fourth embodiment, the coefficient calculation unit 177a has: a basic output calculation unit 177u, which calculates the output of the gas turbine 10 corresponding to the basic maximum opening obtained by the basic maximum opening calculation unit 176b; a modified output calculation unit 177v, which calculates the output of the gas turbine 10 corresponding to the modified maximum opening obtained by the modified maximum opening calculation unit 176c; and a coefficient calculation unit 177w, which outputs the ratio of the output calculated by the modified output calculation unit 177v to the output calculated by the basic output calculation unit 177u as the maximum output correction coefficient Kx.

[0260] For example, the output generator 170 for controlling the gas turbine 10 in the above embodiments can be understood as follows.

[0261] (5) The output generator for controlling the gas turbine 10 in the fifth embodiment includes:

[0262] The maximum output generator 171 of the gas turbine 10 in any one of the first to fourth methods; and the output corrector 180, which corrects the control output of the gas turbine 10. The output corrector 180 includes: a correction coefficient generation unit 183, which generates correction coefficients used when correcting the control output; an output correction unit 188, which corrects the control output using the correction coefficients and outputs the corrected control output as a corrected control output; an output receiving unit 181, which receives at least the output from the output device 72 that detects the output of the gas turbine 10; and an output storage unit 182, which stores the output received by the output receiving unit 181. The correction coefficient generation unit 183 includes: a first coefficient element calculation unit 184a, which calculates a first coefficient element e1; a second coefficient element calculation unit 184b, which calculates a second coefficient element e2; and a correction coefficient calculation unit 187, which calculates the correction coefficient using the first coefficient element e1 and the second coefficient element e2. The output storage unit 182 can store: the reference output PWb, which is the output under the condition that the gas turbine 10 can output the highest output at a past reference time point; and the preceding output PW1 received by the output receiving unit 181 under the condition that the gas turbine 10 can output the highest output in a preceding time period closer to the reference time point. The first coefficient element e1 is the ratio of the preceding output PW1 stored in the output storage unit 182 to the reference output PWb stored in the output storage unit 182. The second coefficient element e2 is the ratio of the current output PW2 received by the output receiving unit 181 under the condition that the gas turbine 10 can output the highest output in the current time period from the preceding time period to the present to the preceding output PW1 stored in the output storage unit 182. The output corrector 180 uses the control maximum output PWx output from the maximum output generator 171 as one of the control outputs.

[0263] In this method, a correction coefficient is obtained using a first coefficient element e1 and a second coefficient element e2. This correction coefficient represents the degree of degradation of the output accompanying the deterioration of gas turbine performance. Furthermore, both the first coefficient element e1 and the second coefficient element e2 represent the degree of degradation of the output indicating gas turbine performance degradation. However, the first coefficient element e1 and the second coefficient element e2 represent the degree of degradation of the output over different time periods. Specifically, the first coefficient element e1 represents the degradation of the output over the preceding time period from a reference time point, and the second coefficient element e2 represents the degradation of the output over the current time period from the preceding time period. Thus, in this method, a correction coefficient is obtained using multiple different coefficient elements, and this correction coefficient is used to correct the control output.

[0264] Therefore, in this method, a corrective control output that appropriately reflects the degree of degradation of the output can be obtained.

[0265] (6) In the control output generator 170 of the gas turbine 10 in the sixth embodiment, the first coefficient element calculation unit 184a calculates the first coefficient element e1 using the current output PW2 of the current time period instead of the preceding output PW1 of the preceding time period, provided that a reset instruction has been received.

[0266] The correction coefficient generation unit 183 further includes: a coefficient element storage unit 185, capable of storing the first coefficient element e1 calculated by the first coefficient element calculation unit 184a and the second coefficient element e2 calculated by the second coefficient element calculation unit 184b; and a reset unit 186, which, upon receiving the reset instruction, resets the second coefficient element e2 stored in the coefficient element storage unit 185 to a value that will not affect the calculation result of the correction coefficient based on the correction coefficient calculation unit 187. The correction coefficient calculation unit 187 uses the second coefficient element e2 and the first coefficient element e1 stored in the coefficient element storage unit 185 to calculate the correction coefficient.

[0267] In this method, the first coefficient element calculation unit 184a and the reset unit 186 receive a reset instruction from the state where the gas turbine 10 is completely stopped until the start of trial operation. If the first coefficient element calculation unit 184a receives the reset instruction, during the trial operation, it calculates the first coefficient element e1 using the current output PW2 of the current time period instead of the preceding output PW1 of the preceding time period. Furthermore, the reset unit 186 resets the second coefficient element e2 stored in the coefficient element storage unit 185 to a value that will not affect the calculation result based on the correction coefficient of the correction coefficient calculation unit 187.

[0268] If the gas turbine performance is improved through periodic maintenance performed before trial operation, even if the first coefficient element e1 and the second coefficient element e2 are calculated using the output PW1 of the immediate preceding time period before trial operation, these first coefficient elements e1 and the second coefficient element e2 will not properly represent the degree of output degradation. Therefore, if the first coefficient element calculation unit 184a in this method receives a reset instruction, it calculates the first coefficient element e1 using the current output PW2 of the current time period. Moreover, if the reset unit 186 in this method receives a reset instruction, it resets the second coefficient element e2 stored in the coefficient element storage unit 185 to a value that will not affect the calculation result based on the correction coefficient of the correction coefficient calculation unit 187.

[0269] Therefore, in this method, even when a trial run begins from a state where the gas turbine 10 has been completely stopped, it is possible to obtain a corrective control output that appropriately reflects the degree of output degradation.

[0270] (7) In the control output generator of the gas turbine 10 in the seventh method, in the control output generator 170 of the gas turbine 10 in the fifth or sixth method, the reference time point is the design time point of the gas turbine 10, and the reference output PWb is the design output under the condition that the gas turbine 10 can output the highest output at the design time point.

[0271] (8) The control output generator for the gas turbine 10 in the eighth embodiment is the control output generator 170 for the gas turbine 10 in the seventh embodiment. The preceding time period includes the time period during the construction trial operation, excluding the trial operation after the gas turbine 10 is inspected or repaired.

[0272] The preceding output PW1 is included in the time period during the construction trial run. Under the condition that the gas turbine 10 can output its maximum output, the output received by the output receiving unit 181 is the construction output PWc. The correction coefficient generation unit 183 also has a third coefficient element calculation unit 184c for calculating the third coefficient element e3. The correction coefficient calculation unit 187 calculates the correction coefficient using the first coefficient element e1, the second coefficient element e2, and the third coefficient element e3. The third coefficient element e3 is the ratio of the construction output PWc stored in the output storage unit 182 to the reference output PWb stored in the output storage unit 182.

[0273] Sometimes, the correction result of the control output, i.e., the relationship between the corrected control output and the command value, changes during the construction and commissioning process based on the results of that process. In this method, during the calculation of the correction coefficient, it is possible that the reference output PWb used in the calculation of the first coefficient element e1 and the reference output PWb used in the calculation of the third coefficient element e3 may cancel each other out. Therefore, the correction coefficient loses the reference output PWb at the design time point and can instead use the measured output during the construction and commissioning process, i.e., the construction output PWc, as the reference to represent the degree of output degradation up to the current time period.

[0274] For example, the control device 100 of the gas turbine 10 in the above embodiments can be understood as follows.

[0275] (9) The control device for the gas turbine 10 in the ninth embodiment includes:

[0276] The gas turbine 10 has a maximum output generator 171 in any of the first to fourth modes; a command value generation unit 110 that generates a command value for a control object of the gas turbine 10 using the maximum output for control output from the maximum output generator 171; and a control signal output unit 190 that outputs a control signal representing the command value to the control object.

[0277] As mentioned above, the maximum output generator 171 in this method receives changes to the maximum opening of the intake air volume regulator 14 and corrects the maximum control output of the gas turbine 10 based on these changes and the intake air temperature. In this method, a command value for the controlled object is generated using the maximum control output PWx corresponding to the changes in the maximum opening of the intake air volume regulator 14, and a control signal representing this command value is output to the controlled object. Therefore, in this method, even if the setting of the maximum control opening is changed, poor control of the controlled object can be suppressed.

[0278] (10) The control device for the gas turbine 10 in the tenth embodiment includes:

[0279] The gas turbine 10 includes a control output generator 170 in any of the fifth to eighth methods; a command value generation unit 110 that generates a command value for a control object of the gas turbine 10 using the modified control output output from the control output generator 170; and a control signal output unit 190 that outputs a control signal representing the command value to the control object.

[0280] As mentioned above, the maximum output generator 171 in the control output generator 170 of this method receives changes to the maximum opening of the intake air volume regulator 14, and corrects the maximum control output of the gas turbine 10 based on these changes and the intake air temperature. Furthermore, as mentioned above, the output corrector 180 in the control output generator 170 can obtain a maximum output PWxm as a corrected control output that appropriately reflects the degree of output degradation. In this method, a command value for the controlled object is generated using the corrected control output, and a control signal representing this command value is output to the controlled object. Therefore, in this method, even if the setting of the maximum control opening is changed, it is possible to suppress control malfunctions of the controlled object caused by the change, and consequently, control malfunctions of the controlled object caused by the degradation of gas turbine performance.

[0281] For example, the method for manufacturing the maximum output of the gas turbine 10 in the above embodiments can be understood as follows.

[0282] (11) In the method for manufacturing the maximum output of the gas turbine 10 in the 11th method

[0283] The gas turbine 10 includes a compressor 11 capable of compressing air to generate compressed air, a burner 31 capable of burning fuel in the compressed air to generate combustion gas, and a turbine 21 capable of being driven by the combustion gas. The compressor 11 has an intake flow regulator 14 for regulating the flow rate of the air it draws in.

[0284] The maximum output generation method comprises the following steps: a temperature receiving step S1, which receives the temperature of the air drawn in by the compressor 11, i.e., the intake temperature; a change receiving step S2, which receives the change in the maximum opening of the intake air volume regulator 14; a basic maximum output calculation step S3, which calculates the basic maximum output PWxb of the gas turbine 10 based on the intake temperature received in the temperature receiving step S1; coefficient generation steps S4 and S4a, which generate a maximum output correction coefficient Kx for correcting the basic maximum output PWxb based on the change in the maximum opening received in the change receiving step S2 and the intake temperature received in the temperature receiving step S1; and a maximum output correction step S8, which uses the maximum output correction coefficient Kx to correct the basic maximum output PWxb and outputs the corrected basic maximum output PWxb as the control maximum output PWx.

[0285] In this method, similar to the maximum output generator 171 in the first method, even if the setting of the maximum opening for control is changed, it will not lead to a shortened life of the gas turbine 10 or a reduction in output, thereby suppressing poor control of the gas turbine 10.

[0286] (12) In the maximum output manufacturing method of the gas turbine 10 in the 12th method, the relationship between the modified maximum opening of the intake air volume regulator 14 and the intake air temperature, i.e., the modified relationship F6, is received in the modification receiving process S2.

[0287] The coefficient generation process S4 includes: a basic maximum opening calculation process S5, which uses a predetermined relationship F5 between the basic maximum opening and the intake temperature in the intake volume regulator 14 to calculate the basic maximum opening corresponding to the intake temperature received in the temperature receiving process S1; a modified maximum opening calculation process S6, which uses the modified relationship F6 received in the modified receiving process S2 to calculate the modified maximum opening corresponding to the intake temperature received in the temperature receiving process S1; and coefficient calculation processes S7 and S7a, which use the basic maximum opening calculated in the basic maximum opening calculation process S5 and the modified maximum opening calculated in the modified maximum opening calculation process S6 to calculate the maximum output correction coefficient Kx.

[0288] (13) In the maximum output manufacturing method of the gas turbine 10 in the 13th method, the coefficient calculation step S7 includes: a deviation calculation step S7s, which calculates the deviation between the basic maximum opening obtained in the basic maximum opening calculation step S5 and the modified maximum opening obtained in the modified maximum opening calculation step S6; and a coefficient calculation step S7t, which uses a predetermined relationship F7 between the deviation and the maximum output correction coefficient to calculate the maximum output correction coefficient corresponding to the deviation obtained in the deviation calculation step S7s.

[0289] (14) The maximum output manufacturing method of the gas turbine 10 in the 14th method: In the maximum output manufacturing method of the gas turbine 10 in the 12th method, the coefficient calculation step S7a includes: a basic output calculation step S7u, which calculates the output of the gas turbine 10 corresponding to the basic maximum opening obtained in the basic maximum opening calculation step S5; a modified output calculation step S7v, which calculates the output of the gas turbine 10 corresponding to the modified maximum opening obtained in the modified maximum opening calculation step S6; and a coefficient calculation step S7w, which outputs the ratio of the output calculated in the modified output calculation step S7v to the output calculated in the basic output calculation step S7u as the maximum output correction coefficient.

[0290] For example, the method for generating the control output of the gas turbine 10 in the above embodiments can be understood as follows.

[0291] (15) The method for producing the control output of the gas turbine 10 in the 15th method executes the maximum output production method of the gas turbine 10 in any one of the 11th to 14th methods, and executes the output correction method for correcting the control output of the gas turbine 10.

[0292] The output correction method includes the following steps: a correction coefficient creation step S20, which creates correction coefficients used when correcting the control output of the gas turbine 10; an output correction step S25, which uses the correction coefficients to correct the control output and outputs the corrected control output as a corrected control output; an output receiving step S11, which receives at least the output from the output instrument 72 that detects the output of the gas turbine 10; and an output storage step S12, which stores the output received in the output receiving step S11. The correction coefficient creation step S20 includes: a first coefficient element calculation step S21a, which calculates a first coefficient element e1; a second coefficient element calculation step S21b, which calculates a second coefficient element e2; and a correction coefficient calculation step S24, which uses the first coefficient element e1 and the second coefficient element e2 to calculate the correction coefficient. In the output storage step S12, the following are stored: the reference output PWb, which is the output at a past reference time point under the condition that the gas turbine 10 can output its maximum output; and the preceding output PW1, received in the output receiving step S11 under the condition that the gas turbine 10 can output its maximum output in a preceding time period closer to the reference time point. The first coefficient element e1 is the ratio of the preceding output PW1 stored in the output storage step S12 to the reference output PWb stored in the output storage step S12. The second coefficient element e2 is the ratio of the current output PW2 received in the output receiving step S11 under the condition that the gas turbine 10 can output its maximum output in the current time period from the preceding time period to the present, to the preceding output PW1 stored in the output storage step S12.

[0293] In this method, similar to the control output generator 170 in the fifth method, a corrective control output that appropriately reflects the degree of output degradation can be obtained.

[0294] (16) In the control output production method of the gas turbine 10 in the 16th method, in the control output production method of the 15th method, the first coefficient element e1 is calculated by using the current output PW2 of the current time period instead of the preceding output PW1 of the preceding time period, provided that a reset instruction has been received in the first coefficient element calculation step S21a.

[0295] The correction coefficient generation process S20 further includes: a coefficient element storage process S22, storing the first coefficient element e1 calculated in the first coefficient element calculation process S21a and the second coefficient element e2 calculated in the second coefficient element calculation process S21b; and a reset process S23, which, if the reset instruction is received, resets the second coefficient element e2 stored in the coefficient element storage process S22 to a value that will not affect the calculation result of the correction coefficient in the correction coefficient calculation process S24. The correction coefficient calculation process S24 uses the second coefficient element e2 and the first coefficient element e1 stored in the coefficient element storage process S22 to calculate the correction coefficient.

[0296] In this method, similar to the control output generator 170 in the sixth method, even when a trial run begins from a state where the gas turbine 10 has been completely stopped, a corrective control output that appropriately reflects the degree of output degradation can be obtained.

[0297] (17) In the method for manufacturing the control output of the gas turbine 10 in the 17th method, in the method for manufacturing the control output of the gas turbine 10 in the 15th or 16th method, the reference time point is the design time point of the gas turbine 10, and the reference output PWb is the design output under the condition that the gas turbine 10 can output the highest output at the design time point.

[0298] (18) In the method for producing the control output of the gas turbine 10 in the 17th method, the immediate time period includes the time period during the construction trial operation, excluding the trial operation after the gas turbine 10 is inspected or repaired.

[0299] The preceding output PW1 is included in the time period during the construction trial run. Under the condition that the gas turbine 10 can output its maximum output, the output received in the output receiving step S11 is the construction output PWc. The correction coefficient production step S20 further includes a third coefficient element calculation step S21c for calculating the third coefficient element e3. In the correction coefficient calculation step S24, the correction coefficient is calculated using the first coefficient element e1, the second coefficient element e2, and the third coefficient element e3. The third coefficient element e3 is the ratio of the construction output PWc stored in the output storage step S12 to the reference output PWb stored in the output storage step S12.

[0300] In this method, similar to the control output generator 170 in the eighth method, the degree of degradation of the output up to the current time period can be represented by the measured output during the construction trial run, i.e., the construction output PWc benchmark.

[0301] For example, the control method of the gas turbine 10 in the above embodiments can be understood as follows.

[0302] (19) The control method of the gas turbine 10 in the 19th method executes the maximum output production method of the gas turbine 10 in any one of the 11th to 14th methods, and performs the following steps: command value production step S33, using the maximum output for control obtained by the maximum output production method, to produce a command value for the control object of the gas turbine 10; and control signal output step S34, outputting a control signal representing the command value to the control object.

[0303] In this method, similar to the control device 100 in the 9th method, even if the setting of the maximum opening for control is changed, the control object is not properly controlled.

[0304] (20) The control method of the gas turbine 10 in the 20th method executes the control output production method of the gas turbine 10 in any one of the 15th to 18th methods, and performs the following steps: command value production step S33, using the modified control output obtained by the control output production method to produce a command value for the control object of the gas turbine 10; and control signal output step S34, outputting a control signal representing the command value to the control object.

[0305] In this method, similar to the control device 100 in the 10th method, even if the setting of the maximum opening for control is changed, it is possible to suppress the control failure of the controlled object caused by the change, and further suppress the control failure of the controlled object caused by the deterioration of the gas turbine performance.

[0306] For example, the maximum output production process 103paa of the gas turbine 10 in the above embodiment can be understood as follows.

[0307] (21) The maximum output production program for the gas turbine 10 in method 21 is the maximum output production program for the gas turbine 10, 103paa, where,

[0308] The gas turbine 10 includes a compressor 11 capable of compressing air to generate compressed air, a burner 31 capable of burning fuel in the compressed air to generate combustion gas, and a turbine 21 capable of being driven by the combustion gas. The compressor 11 has an intake flow regulator 14 for regulating the flow rate of the air it draws in.

[0309] The maximum output generation program 103paa causes the computer to perform the following steps: a temperature receiving step S1, receiving the temperature of the air drawn in by the compressor 11, i.e., the intake temperature; a change receiving step S2, receiving the change in the maximum opening of the intake air volume regulator 14; a basic maximum output calculation step S3, calculating the basic maximum output PWxb of the gas turbine 10 based on the intake temperature received in the temperature receiving step S1; coefficient generation steps S4 and S4a, generating a maximum output correction coefficient Kx for correcting the basic maximum output PWxb based on the change in the maximum opening received in the change receiving step S2 and the intake temperature received in the temperature receiving step S1; and a maximum output correction step S8, correcting the basic maximum output PWxb using the maximum output correction coefficient Kx, and outputting the corrected basic maximum output PWxb as the control maximum output PWx.

[0310] In this method, similar to the maximum output generator 171 in the first method, even if the setting of the maximum opening for control is changed, it will not lead to a shortened life of the gas turbine 10 or a reduction in output, thereby suppressing poor control of the gas turbine 10.

[0311] (22) In the maximum output production process of the gas turbine 10 in the 22nd method, in the maximum output production process 103paa of the gas turbine 10 in the 21st method, the relationship between the modified maximum opening of the intake air volume regulator 14 and the intake air temperature, i.e., the modified relationship F6, is received in the modification receiving process S2.

[0312] The coefficient generation process S4 includes: a basic maximum opening calculation process S5, which uses a predetermined relationship F5 between the basic maximum opening and the intake temperature in the intake volume regulator 14 to calculate the basic maximum opening corresponding to the intake temperature received in the temperature receiving process S1; a modified maximum opening calculation process S6, which uses the modified relationship F6 received in the modified receiving process S2 to calculate the modified maximum opening corresponding to the intake temperature received in the temperature receiving process S1; and coefficient calculation processes S7 and S7a, which use the basic maximum opening calculated in the basic maximum opening calculation process S5 and the modified maximum opening calculated in the modified maximum opening calculation process S6 to calculate the maximum output correction coefficient Kx.

[0313] (23) In the maximum output production process of the gas turbine 10 in the 23rd method, in the maximum output production process 103paa of the gas turbine 10 in the 22nd method, the coefficient calculation process S7 includes: a deviation calculation process S7s, which calculates the deviation between the basic maximum opening obtained in the basic maximum opening calculation process S5 and the modified maximum opening obtained in the modified maximum opening calculation process S6; and a coefficient calculation process S7t, which calculates the maximum output correction coefficient corresponding to the deviation obtained in the deviation calculation process S7s using a predetermined relationship between the deviation and the maximum output correction coefficient.

[0314] (24) In the maximum output production procedure of the gas turbine 10 in the 24th method, in the maximum output production procedure 103paa of the gas turbine 10 in the 22nd method, the coefficient calculation step S7a includes: a basic output calculation step S7u, which calculates the output of the gas turbine 10 corresponding to the basic maximum opening obtained in the basic maximum opening calculation step S5; a modified output calculation step S7v, which calculates the output of the gas turbine 10 corresponding to the modified maximum opening obtained in the modified maximum opening calculation step S6; and a coefficient calculation step S7w, which outputs the ratio of the output calculated in the modified output calculation step S7v to the output calculated in the basic output calculation step S7u as the maximum output correction coefficient.

[0315] For example, the control output generation program 103pa of the gas turbine 10 in the above embodiment can be understood as follows.

[0316] (25) The output generation program for controlling the gas turbine 10 in the 25th embodiment has the following features:

[0317] The maximum output generation program 103paa of any one of the 21st to 24th methods of the gas turbine 10; and the output correction program 103pab, which corrects the control output of the gas turbine 10. The output correction program 103pab causes the computer to perform the following steps: a correction coefficient generation step S20, which generates a correction coefficient used when correcting the control output of the gas turbine 10; an output correction step S25, which corrects the control output using the correction coefficient and outputs the corrected control output as the corrected control output; an output receiving step S11, which receives at least the output from the output instrument 72 that detects the output of the gas turbine 10; and an output storage step S12, which stores the output received in the output receiving step S11. The correction coefficient generation step S20 includes: a first coefficient element calculation step S21a, which calculates a first coefficient element e1; a second coefficient element calculation step S21b, which calculates a second coefficient element e2; and a correction coefficient calculation step S24, which calculates the correction coefficient using the first coefficient element e1 and the second coefficient element e2. In the output storage step S12, the following are stored: the reference output PWb, which is the output at a past reference time point under the condition that the gas turbine 10 can output its maximum output; and the preceding output PW1, received in the output receiving step S11 under the condition that the gas turbine 10 can output its maximum output in a preceding time period closer to the reference time point. The first coefficient element e1 is the ratio of the preceding output PW1 stored in the output storage step S12 to the reference output PWb stored in the output storage step S12. The second coefficient element e2 is the ratio of the current output PW2 received in the output receiving step S11 under the condition that the gas turbine 10 can output its maximum output in the current time period from the preceding time period to the present, to the preceding output PW1 stored in the output storage step S12.

[0318] In this method, similar to the control output generator 170 in the fifth method, a corrective control output that appropriately reflects the degree of output degradation can be obtained.

[0319] For example, the control program 103p of the gas turbine 10 in the above embodiments can be understood as follows.

[0320] (26) The control program of the gas turbine 10 in the 26th mode has a maximum output generation program 103paa of the gas turbine 10 in any one of the 21st to 24th modes, and causes the computer to perform the following steps: instruction value generation step S33, using the maximum output for control obtained by executing the maximum output generation program 103paa, to generate an instruction value for the control object of the gas turbine 10; and control signal output step S34, to output a control signal representing the instruction value to the control object.

[0321] In this method, similar to the control device 100 in the 9th method, even if the setting of the maximum opening for control is changed, the control object is not properly controlled.

[0322] (27) The control program of the gas turbine 10 in the 27th embodiment has the control output creation program 103pa of the gas turbine 10 in the 25th embodiment, and causes the computer to perform the following steps: instruction value creation step S33, using the modified control output obtained by executing the control output creation program 103pa, to create an instruction value for the control object of the gas turbine 10; and control signal output step S34, to output a control signal representing the instruction value to the control object.

[0323] In this method, similar to the control device 100 in the 10th method, even if the setting of the maximum opening for control is changed, it is possible to suppress the control failure of the controlled object caused by the change, and further suppress the control failure of the controlled object caused by the deterioration of the gas turbine performance.

[0324] Industrial availability

[0325] In one aspect of the present invention, changes to the maximum opening of the intake air volume regulator can be received. Furthermore, in this aspect, even when the maximum opening setting is changed, malfunctions in gas turbine control can be suppressed.

[0326] Symbol Explanation

[0327] 1-Gas turbine equipment, 2-Flue, 2m-Main flue, 2a-First flue, 2b-Second flue, 3-Switching damper, 4-Waste heat recovery boiler, 5-Steam turbine, 6-Steam turbine generator, 7-Condenser, 8-Pump, 9a-First chimney, 9b-Second chimney, 10-Gas turbine, 11-Compressor, 12-Compressor housing, 13-Compressor rotor, 14-IGY (Inlet flow regulator), 15-Guide vane, 16-Driver, 21-Turbine, 22-Turbine housing, 23-Turbine rotor, 28-Gas turbine rotor, 24-Intermediate housing, 25-Exhaust housing, 29-Generator (gas turbine generator), 31-Burner, 32-Outer casing, 33-Combustion cylinder (or tail cylinder), 4 1-Fuel injector, 42-Inner cylinder, 43-Pilot burner, 44-Pilot nozzle, 45-Pilot air cylinder, 48-Pilot air flow path, 49-Diffuser flame, 51-Top cap nozzle, 52-Compressed air flow path, 53-Main burner, 54-Main nozzle, 55-Main air inner cylinder, 56-Main air outer cylinder, 57-Baffle, 58-Main air flow path, 59-Premixed flame, 60-Fuel line, 61-Pilot fuel line, 62-Main fuel line, 63-Top cap fuel line, 65-Pilot fuel valve, 66-Main fuel valve, 67-Top cap fuel valve, 71-Tachometer, 72-Output instrument, 73-Inlet air thermometer, 74-Inlet air pressure gauge, 75-Blade passage thermometer, 76-Exhaust air temperature gauge 100-Control device, 101-CPU, 102-Main storage device, 103-Auxiliary storage device, 103p-Control program, 103pa-Control output generation program, 103paa-Maximum output generation program, 103pab-Output correction program, 104-Input device, 105-Display device, 106-Input / output interface, 107-Device interface, 108-Communication interface, 109-Storage / playback device, 110-Instruction value generation unit, 120-Combustion load instruction generator, 121a-700℃MW arithmetic unit, 121b-1500℃MW arithmetic unit, 122-Standard atmospheric pressure generator, 123-First divider, 124a-First multiplier, 12 4b - Second multiplier, 125a - First subtractor, 125b - Second subtractor, 126 - Second divider, 127 - Limiter, 130 - Fuel flow command generator, 131 - Governor controller, 132 - Load controller, 132a - Low value selector, 132b - Proportional-integral (PI) calculator, 133 - Blade passage temperature controller, 134 - Exhaust temperature controller, 135 - Low value selector, 136 - Limiter, 140 - Load rate calculator, 141 - Maximum output generator, 142 - Switcher, 143 - Divider, 150 - Flow ratio calculator, 150p - Pilot ratio calculator, 151p - PLor calculator, 152p - Correction value calculator, 153p - Corrector.150t - Top cap ratio calculator, 151t - THor arithmetic unit, 152t - Correction value arithmetic unit, 153t - Corrector, 155 - Valve command value generator, 156p - First multiplier, 156t - Second multiplier, 156ma - First subtractor, 156mb - Second subtractor, 157p - PL valve command value arithmetic unit, 157m - M valve command value arithmetic unit, 157t - TH valve command value arithmetic unit, 160 - IGV command value generator, 170 - Control output generator, 171, 171a, 171b - Maximum output generator, 172 - Temperature receiver, 173 - Change receiver, 174 - 175 - Basic maximum output calculation unit, 176 - Maximum output correction unit, 177 - Coefficient generation unit, 176b - Basic maximum opening calculation unit, 176c - Modified maximum opening calculation unit, 177, 177a - Coefficient calculation unit, 177s - Deviation calculation unit, 177t, 177w - Coefficient calculation unit, 177u - Basic output calculation unit, 177v - Modified output calculation unit, 178 - Pattern correspondence coefficient generation unit, 179 - Pattern correspondence correction unit, 180 - Output corrector, 181 - Output receiving unit, 182 - Output storage unit, 183 - Correction coefficient generation unit, 184a - First coefficient element calculation unit, 184b - Second... Coefficient element calculation unit, 184c - 3rd coefficient element calculation unit, 185 - Coefficient element storage unit, 185a - 1st coefficient element storage unit, 185b - 2nd coefficient element storage unit, 185c - 3rd coefficient element storage unit, 186 - Reset unit, 187 - Correction coefficient calculation unit, 187a - 1st correction coefficient calculation unit, 187b - 2nd correction coefficient calculation unit, 187s - Divider, 187t - Multiplier, 187u - Correction coefficient adjuster, 188 - Output correction unit, 188a - 1st output correction unit, 188b - 2nd output correction unit, 188c - 3rd output correction unit, 188s - Divider, 18 8t - Multiplier, 188u - Adder, 188v - Low-value selector, 188x - First storage unit, 188y - Second storage unit, 190 - Control signal output unit, IGVc - IGV command value, e1 - First coefficient element, e2 - Second coefficient element, e3 - Third coefficient element, K1 - First correction coefficient, K2 - Second correction coefficient, Kx - Correction coefficient, PW - Output (or measured output), PWr - Request output, PWb - Reference output, PWc - Construction output, PW1 - Preceding output, PW2 - Current output, PWx - Maximum output, PWxb - Basic maximum output, PWxm - Modified maximum output.

Claims

1. A maximum output generator for a gas turbine, the gas turbine comprising a compressor capable of compressing air to generate compressed air, a burner capable of burning fuel in the compressed air to generate combustion gas, and a turbine capable of being driven by the combustion gas, the compressor comprising an intake flow regulator for regulating the flow rate of air it draws in, the maximum output generator for the gas turbine comprising: The temperature receiving unit receives the temperature of the air drawn in by the compressor, i.e., the intake air temperature; The receiving unit receives changes to the maximum opening of the intake volume regulator; The basic maximum output calculation unit calculates the basic maximum output of the gas turbine based on the intake air temperature received by the temperature receiving unit. The coefficient generation unit generates a maximum output correction coefficient for correcting the basic maximum output based on the change content of the maximum opening received by the change receiving unit and the intake temperature received by the temperature receiving unit. and The maximum output correction unit corrects the basic maximum output using the maximum output correction coefficient and outputs the corrected basic maximum output as the control maximum output.

2. The maximum output generator for a gas turbine according to claim 1, wherein, The change receiving unit receives the relationship between the changed maximum opening degree of the intake air volume regulator and the intake air temperature, i.e., the changed relationship. The coefficient production unit has: The basic maximum opening calculation unit uses a predetermined relationship, namely the basic relationship, between the basic maximum opening in the intake volume regulator and the intake temperature to calculate the basic maximum opening corresponding to the intake temperature received by the temperature receiving unit. The modified maximum opening calculation unit uses the modified relationship received by the modified receiving unit to calculate the modified maximum opening corresponding to the intake air temperature received by the temperature receiving unit. and The coefficient calculation unit calculates the maximum output correction coefficient using the basic maximum opening calculated by the basic maximum opening calculation unit and the modified maximum opening calculated by the modified maximum opening calculation unit.

3. The maximum output generator for a gas turbine according to claim 2, wherein, The coefficient calculation unit has: The deviation calculation unit calculates the deviation between the basic maximum opening calculated by the basic maximum opening calculation unit and the modified maximum opening calculated by the modified maximum opening calculation unit; and The coefficient calculation unit uses a predetermined relationship between the deviation and the maximum output correction coefficient to calculate the maximum output correction coefficient corresponding to the deviation calculated by the deviation calculation unit.

4. The maximum output generator for a gas turbine according to claim 2, wherein, The coefficient calculation unit has: The basic output calculation unit calculates the output of the gas turbine corresponding to the basic maximum opening obtained by the basic maximum opening calculation unit; The modified output calculation unit calculates the output of the gas turbine corresponding to the modified maximum opening obtained by the modified maximum opening calculation unit; and The coefficient calculation unit outputs the ratio of the output calculated by the modified output calculation unit to the output calculated by the basic output calculation unit as the maximum output correction coefficient.

5. An output generator for controlling a gas turbine, comprising: The maximum output generator of the gas turbine as claimed in any one of claims 1 to 4; and Output corrector, corrects the control output of the gas turbine. The output corrector has the following features: The correction coefficient production unit produces correction coefficients used when correcting the control output; The output correction unit uses the correction coefficient to correct the control output and outputs the corrected control output as a corrected control output. The output receiving unit receives at least the output from the output instrument that detects the output of the gas turbine. and The output storage unit stores the output received by the output receiving unit. The correction coefficient generation unit has: The first coefficient element calculation unit calculates the first coefficient element; The second coefficient element calculation unit calculates the second coefficient element; and The correction coefficient calculation unit calculates the correction coefficient using the first coefficient element and the second coefficient element. The output storage unit can store: the reference output, i.e., the output under the condition that the gas turbine can output its maximum output at a past reference time point; and the immediate preceding output received by the output receiving unit under the condition that the gas turbine can output its maximum output in a time period closer to the present than the reference time point. The first coefficient element is the ratio of the preceding output stored in the output storage unit to the reference output stored in the output storage unit. The second coefficient element is, within the current time period from the preceding time period to the present, under the condition that the gas turbine can output its maximum output, the ratio of the current output received by the output receiving unit to the preceding output stored in the output storage unit. The output corrector corrects the maximum output for control output from the maximum output generator as one of the control outputs.

6. The output generator for controlling a gas turbine according to claim 5, wherein, The first coefficient element calculation unit calculates the first coefficient element using the current output of the current time period, instead of the preceding output of the preceding time period, based on the condition that a reset instruction has been received. The correction coefficient production unit also has: The coefficient element storage unit is capable of storing the first coefficient element calculated by the first coefficient element calculation unit and the second coefficient element calculated by the second coefficient element calculation unit; and If the reset unit receives the reset instruction, it resets the second coefficient element stored in the coefficient element storage unit to a value that will not affect the calculation result of the correction coefficient based on the correction coefficient calculation unit. The correction coefficient calculation unit calculates the correction coefficient using the second coefficient element and the first coefficient element stored in the coefficient element storage unit.

7. The output generator for controlling a gas turbine according to claim 5 or 6, wherein, The reference time point is the design time point of the gas turbine, and the reference output is the design output under the condition that the gas turbine can output the highest output at the design time point.

8. The output generator for controlling a gas turbine according to claim 7, wherein, The preceding time period includes the construction and commissioning period following the construction of the gas turbine, excluding the commissioning period following inspection or repair of the gas turbine. The preceding output is included in the time period during the construction and commissioning process. Under the condition that the gas turbine can output its maximum output, the output received by the output receiving unit is the construction output. The correction coefficient production unit also includes a third coefficient element calculation unit for calculating the third coefficient element. The correction coefficient calculation unit uses the first coefficient element, the second coefficient element, and the third coefficient element to calculate the correction coefficient. The third coefficient element is the ratio of the construction output stored in the output storage unit to the reference output stored in the output storage unit.

9. A control device for a gas turbine, comprising: Maximum output generator of gas turbine as claimed in any one of claims 1 to 4; The command value generation unit uses the maximum output for control output from the maximum output generator to generate command values ​​for the control object of the gas turbine; and The control signal output unit outputs a control signal representing the command value to the controlled object.

10. A control device for a gas turbine, comprising: Output generator for controlling a gas turbine as claimed in any one of claims 5 to 8; The command value generation unit uses the modified control output output from the control output generator to generate command values ​​for the control object of the gas turbine; and The control signal output unit outputs a control signal representing the command value to the controlled object.

11. A method for manufacturing the maximum output of a gas turbine, the gas turbine comprising a compressor capable of compressing air to generate compressed air, a burner capable of burning fuel in the compressed air to generate combustion gas, and a turbine capable of being driven by the combustion gas, the compressor comprising an intake flow regulator for regulating the flow rate of the air it draws in, the method for manufacturing the maximum output of the gas turbine comprising the following steps: The temperature receiving process receives the temperature of the air drawn in by the compressor, i.e., the intake temperature. The change receiving process receives the change information regarding the maximum opening of the intake volume regulator; The basic maximum output calculation process calculates the basic maximum output of the gas turbine based on the intake air temperature received in the temperature receiving process. The coefficient generation process involves generating a maximum output correction coefficient for correcting the basic maximum output, based on the changes to the maximum opening received in the change receiving process and the intake air temperature received in the temperature receiving process; and The maximum output correction process uses the maximum output correction coefficient to correct the basic maximum output and outputs the corrected basic maximum output as the control maximum output.

12. The method for manufacturing the maximum output of a gas turbine according to claim 11, wherein, In the change receiving process, the relationship between the changed maximum opening of the intake air volume regulator and the intake air temperature, i.e., the changed relationship, is received. The coefficient manufacturing process includes: The basic maximum opening calculation process uses a predetermined relationship, namely the basic relationship, between the basic maximum opening of the intake volume regulator and the intake temperature to calculate the basic maximum opening corresponding to the intake temperature received in the temperature receiving process. The modified maximum opening calculation step uses the modified relationship received in the modified receiving step to calculate the modified maximum opening corresponding to the intake air temperature received in the temperature receiving step; and The coefficient calculation process uses the basic maximum opening calculated in the basic maximum opening calculation process and the modified maximum opening calculated in the modified maximum opening calculation process to calculate the maximum output correction coefficient.

13. The method for manufacturing the maximum output of a gas turbine according to claim 12, wherein, The coefficient calculation process includes: The deviation calculation step calculates the deviation between the basic maximum opening calculated in the basic maximum opening calculation step and the modified maximum opening calculated in the modified maximum opening calculation step; and The coefficient calculation step uses a predetermined relationship between the deviation and the maximum output correction coefficient to calculate the maximum output correction coefficient corresponding to the deviation obtained in the deviation calculation step.

14. The method for manufacturing the maximum output of a gas turbine according to claim 12, wherein, The coefficient calculation process includes: The basic output calculation process calculates the output of the gas turbine corresponding to the basic maximum opening obtained in the basic maximum opening calculation process. The modified output calculation process calculates the output of the gas turbine corresponding to the modified maximum opening obtained in the modified maximum opening calculation process; and The coefficient calculation process outputs the ratio of the output calculated in the modified output calculation process to the output calculated in the basic output calculation process as the maximum output correction coefficient.

15. A method for generating the control output of a gas turbine, comprising executing the method for generating the maximum output of a gas turbine according to any one of claims 11 to 14, and executing an output correction method for correcting the control output of the gas turbine. The output correction method performs the following steps: The correction coefficient manufacturing process produces correction coefficients used when correcting the control output of the gas turbine. The output correction process uses the correction coefficient to correct the control output and outputs the corrected control output as the corrected control output. The output receiving process includes receiving at least the output from an output device that detects the output of the gas turbine. and The output storage process stores the output received in the output receiving process. The process for producing the correction coefficient includes: The first coefficient element calculation process calculates the first coefficient element; The second coefficient element calculation process involves calculating the second coefficient element; and The correction coefficient calculation process involves using the first coefficient element and the second coefficient element to calculate the correction coefficient. The output storage process stores: the baseline output, which is the output under the condition that the gas turbine could output its maximum output at a past reference time point; and the preceding output received in the output receiving process, under the condition that the gas turbine could output its maximum output in a time period closer to the present than the reference time point. The first coefficient element is the ratio of the preceding output stored in the output storage process to the reference output stored in the output storage process. The second coefficient element is the ratio of the current output received in the output receiving process to the preceding output stored in the output storage process, under the condition that the gas turbine can output the highest output, during the current time period from the preceding time period to the present.

16. The method for generating the control output of a gas turbine according to claim 15, wherein, In the first coefficient element calculation step, the first coefficient element is calculated using the current output of the current time period instead of the preceding output of the preceding time period, provided that a reset instruction has been received. The process of producing the correction coefficient also includes: The coefficient element storage process stores the first coefficient element calculated in the first coefficient element calculation process and the second coefficient element calculated in the second coefficient element calculation process; and In the reset process, if the reset instruction is received, the second coefficient element stored in the coefficient element storage process is reset to a value that will not affect the calculation result of the correction coefficient in the correction coefficient calculation process. In the correction coefficient calculation process, the correction coefficient is calculated using the second coefficient element and the first coefficient element stored in the coefficient element storage process.

17. The method for generating the control output of a gas turbine according to claim 15 or 16, wherein, The reference time point is the design time point of the gas turbine, and the reference output is the design output under the condition that the gas turbine can output the highest output at the design time point.

18. The method for generating the control output of a gas turbine according to claim 17, wherein, The preceding time period includes the construction trial period, excluding the trial period following the inspection or repair of the gas turbine. The preceding output is included in the time period during the construction and commissioning process. Under the condition that the gas turbine can output its maximum output, the output received in the output receiving process is the construction output. The correction coefficient production process also includes a third coefficient element calculation process. In the correction coefficient calculation process, the correction coefficient is calculated using the first coefficient element, the second coefficient element, and the third coefficient element. The third coefficient element is the ratio of the construction output stored in the output storage process to the reference output stored in the output storage process.

19. A method for controlling a gas turbine, comprising executing the method for manufacturing the maximum output of a gas turbine as described in any one of claims 11 to 14, and performing the following steps: The instruction value creation process involves using the maximum output for control obtained through the maximum output creation method to create an instruction value for the control object of the gas turbine; and The control signal output process outputs a control signal representing the command value to the controlled object.

20. A method for controlling a gas turbine, comprising executing the method for manufacturing a control output for a gas turbine as described in any one of claims 15 to 18, and performing the following steps: The instruction value creation process involves using the modified control output obtained through the control output creation method to create an instruction value for the control object of the gas turbine; and The control signal output process outputs a control signal representing the command value to the controlled object.

21. A maximum output generation procedure for a gas turbine, the gas turbine comprising a compressor capable of compressing air to generate compressed air, a burner capable of burning fuel in the compressed air to generate combustion gas, and a turbine capable of being driven by the combustion gas, the compressor having an intake flow regulator for regulating the flow rate of the air it draws in, the maximum output generation procedure for the gas turbine causing a computer to perform the following steps: The temperature receiving process receives the temperature of the air drawn in by the compressor, i.e., the intake temperature. The change receiving process receives the change information regarding the maximum opening of the intake volume regulator; The basic maximum output calculation process calculates the basic maximum output of the gas turbine based on the intake air temperature received in the temperature receiving process. The coefficient generation process involves generating a maximum output correction coefficient for correcting the basic maximum output, based on the changes to the maximum opening received in the change receiving process and the intake air temperature received in the temperature receiving process; and The maximum output correction process uses the maximum output correction coefficient to correct the basic maximum output and outputs the corrected basic maximum output as the control maximum output.

22. The maximum output generation procedure for a gas turbine according to claim 21, wherein, In the change receiving process, the relationship between the changed maximum opening of the intake air volume regulator and the intake air temperature, i.e., the changed relationship, is received. The coefficient manufacturing process includes: The basic maximum opening calculation process uses a predetermined relationship, namely the basic relationship, between the basic maximum opening of the intake volume regulator and the intake temperature to calculate the basic maximum opening corresponding to the intake temperature received in the temperature receiving process. The modified maximum opening calculation step uses the modified relationship received in the modified receiving step to calculate the modified maximum opening corresponding to the intake air temperature received in the temperature receiving step; and The coefficient calculation process uses the basic maximum opening calculated in the basic maximum opening calculation process and the modified maximum opening calculated in the modified maximum opening calculation process to calculate the maximum output correction coefficient.

23. The maximum output generation procedure for a gas turbine according to claim 22, wherein, The coefficient calculation process includes: The deviation calculation step calculates the deviation between the basic maximum opening calculated in the basic maximum opening calculation step and the modified maximum opening calculated in the modified maximum opening calculation step; and The coefficient calculation step uses a predetermined relationship between the deviation and the maximum output correction coefficient to calculate the maximum output correction coefficient corresponding to the deviation obtained in the deviation calculation step.

24. The maximum output generation procedure for a gas turbine according to claim 22, wherein, The coefficient calculation process includes: The basic output calculation process calculates the output of the gas turbine corresponding to the basic maximum opening obtained in the basic maximum opening calculation process. The modified output calculation process calculates the output of the gas turbine corresponding to the modified maximum opening obtained in the modified maximum opening calculation process; and The coefficient calculation process outputs the ratio of the output calculated in the modified output calculation process to the output calculated in the basic output calculation process as the maximum output correction coefficient.

25. A control output generation program for a gas turbine, comprising: The maximum output manufacturing procedure for the gas turbine as described in any one of claims 21 to 24; and The output correction program corrects the control output of the gas turbine. The output correction procedure causes the computer to perform the following steps: The correction coefficient manufacturing process produces correction coefficients used when correcting the control output of the gas turbine. The output correction process uses the correction coefficient to correct the control output and outputs the corrected control output as the corrected control output. The output receiving process includes receiving at least the output from an output device that detects the output of the gas turbine. and The output storage process stores the output received in the output receiving process. The process for producing the correction coefficient includes: The first coefficient element calculation process calculates the first coefficient element; The second coefficient element calculation process involves calculating the second coefficient element; and The correction coefficient calculation process involves using the first coefficient element and the second coefficient element to calculate the correction coefficient. The output storage process stores: the baseline output, which is the output under the condition that the gas turbine could output its maximum output at a past reference time point; and the preceding output received in the output receiving process, under the condition that the gas turbine could output its maximum output in a time period closer to the present than the reference time point. The first coefficient element is the ratio of the preceding output stored in the output storage process to the reference output stored in the output storage process. The second coefficient element is the ratio of the current output received in the output receiving process to the preceding output stored in the output storage process, under the condition that the gas turbine can output the highest output, during the current time period from the preceding time period to the present.

26. A control program for a gas turbine, comprising a maximum output generation program for the gas turbine as claimed in any one of claims 21 to 24, and causing the computer to perform the following steps: The instruction value creation process uses the maximum output for control, obtained by executing the maximum output creation program, to create an instruction value for the control object of the gas turbine; and The control signal output process outputs a control signal representing the command value to the controlled object.

27. A control program for a gas turbine, comprising the control output generation program for a gas turbine as described in claim 25, and causing the computer to perform the following steps: The instruction value creation process uses the modified control output obtained by executing the control output creation program to create instruction values ​​for the control object of the gas turbine; and The control signal output process outputs a control signal representing the command value to the controlled object.

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