Gas turbine control device, gas turbine control method, and gas turbine control program

Abstract

To prevent a malfunction of interlock control even when an abnormality occurs in a sensor.SOLUTION: A data measurement unit, disposed at a predetermined position in a flow passage through which a medium used in a gas turbine flows, includes a flow rate data detection sensor and a correction data detection sensor. A flow rate calculation value obtained by correcting flow rate data with correction data is used for interlock control of the gas turbine. A gas turbine control device detects alternative correction data on the upstream side or the downstream side of the data measurement unit in the flow passage. The correction data and the alternative correction data are compared to determine whether or not there is an anomaly in the correction data. When it is determined that there is the anomaly, an interlock control unit performs the interlock control based on the flow rate calculation value that is calculated by correcting the flow rate data using the alternative correction data instead of the correction data.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a gas turbine control device, a gas turbine control method, and a gas turbine control program. [Background technology]

[0002] In plant equipment, flow paths such as piping through which media necessary for operation flow are provided. For example, in a gas turbine, this type of medium includes cooling air for suppressing temperature rise in the equipment, and fuel supplied to a combustor that generates combustion gas for driving the turbine. In the flow paths through which these media flow, the flow rate of the medium is monitored, and if an abnormality is detected based on the monitoring results, so-called interlock control is adopted, which restricts the operation of the equipment (e.g., Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2003-206757 A Summary of the Invention [Problem to be solved by the invention]

[0004] The flow rate of the medium can be monitored by a flow sensor installed in the flow path. However, since the measurement value of the flow sensor contains some error, the error contained in the measurement value of the flow sensor can be reduced by acquiring temperature and pressure as correction data using another sensor installed at a predetermined position in the flow path together with the flow sensor and correcting the measurement value using the correction data. In the above-mentioned interlock control, an abnormality in the monitored object is determined based on the flow calculation value obtained by correcting the measurement value of the flow sensor with the correction data in this way.

[0005] However, if an abnormality occurs in the sensor from which the correction data is acquired, the correction data may deviate significantly from a normal value. If the correction data acquired from such an abnormal sensor is used, the flow rate calculation value described above may also deviate significantly from a normal value, which may result in a malfunction of the interlock control.

[0006] At least one embodiment of the present disclosure has been made in consideration of the above-described circumstances, and has an object to provide a gas turbine control device, a gas turbine control method, and a gas turbine control program that are capable of preventing malfunction of interlock control even when an abnormality occurs in a sensor. [Means for solving the problem]

[0007] In order to solve the above problems, a gas turbine control device according to at least one embodiment of the present disclosure includes: a data measurement unit that is disposed at a predetermined position in a flow path through which a medium used in the gas turbine flows, the data measurement unit including a flow rate data detection sensor for detecting flow rate data of the medium, and a correction data detection sensor for detecting correction data for correcting the flow rate data; an interlock control unit for performing an interlock control of the gas turbine based on a flow rate calculation value obtained by correcting the flow rate data with the correction data; A gas turbine control device for controlling the gas turbine, comprising: an alternative correction data detection unit that is disposed upstream or downstream of the predetermined position in the flow path and detects alternative correction data for the correction data; an abnormality determination unit for determining whether or not the correction data has an abnormality by comparing the correction data with the alternative correction data; Equipped with When the abnormality determination unit determines that the abnormality exists, the flow rate calculation value is calculated by correcting the flow rate data using the alternative correction data instead of the correction data.

[0008] In order to solve the above problem, a gas turbine control method according to at least one embodiment of the present disclosure includes: a data measurement unit that is disposed at a predetermined position in a flow path through which a medium used in the gas turbine flows, the data measurement unit including a flow rate data detection sensor for detecting flow rate data of the medium, and a correction data detection sensor for detecting correction data for correcting the flow rate data; an interlock control unit for performing an interlock control of the gas turbine based on a flow rate calculation value obtained by correcting the flow rate data with the correction data; A gas turbine control method for controlling the gas turbine, comprising: a step of detecting an alternative correction data for the correction data, the alternative correction data being disposed upstream or downstream of the predetermined position in the flow path; determining whether the correction data is abnormal by comparing the correction data with the alternative correction data; Equipped with When the abnormality determination unit determines that the abnormality exists, the flow rate calculation value is calculated by correcting the flow rate data using the alternative correction data instead of the correction data.

[0009] In order to solve the above problem, a gas turbine control program according to at least one embodiment of the present disclosure includes: a data measurement unit that is disposed at a predetermined position in a flow path through which a medium used in the gas turbine flows, the data measurement unit including a flow rate data detection sensor for detecting flow rate data of the medium, and a correction data detection sensor for detecting correction data for correcting the flow rate data; an interlock control unit for performing an interlock control of the gas turbine based on a flow rate calculation value obtained by correcting the flow rate data with the correction data; A gas turbine control program for controlling the gas turbine, comprising: A computer device includes: a step of detecting an alternative correction data for the correction data, the alternative correction data being disposed upstream or downstream of the predetermined position in the flow path; determining whether the correction data is abnormal by comparing the correction data with the alternative correction data; It is possible to execute When the abnormality determination unit determines that the abnormality exists, the flow rate calculation value is calculated by correcting the flow rate data using the alternative correction data instead of the correction data. Effect of the Invention

[0010] According to at least one embodiment of the present disclosure, it is possible to provide a gas turbine control device, a gas turbine control method, and a gas turbine control program that are capable of preventing malfunction of interlock control even when an abnormality occurs in a sensor. [Brief description of the drawings]

[0011] [Figure 1] 1 is a schematic configuration diagram of a cooling structure of a gas turbine according to an embodiment. [Diagram 2] FIG. 1 is a block diagram of a gas turbine control device according to an embodiment. [Diagram 3] 3 is a process flow diagram of a flow rate calculation unit in FIG. 2. [Figure 4A] FIG. 2 is a schematic configuration diagram showing one variation of the cooling structure of the gas turbine of FIG. [Figure 4B] 1. FIG. 4 is a schematic configuration diagram showing another variation of the cooling structure of the gas turbine in FIG. [Figure 4C] 1. FIG. 4 is a schematic configuration diagram showing another variation of the cooling structure of the gas turbine in FIG. [Figure 5A] 1. FIG. 4 is a schematic configuration diagram showing another variation of the cooling structure of the gas turbine in FIG. [Figure 5B] 1. FIG. 4 is a schematic configuration diagram showing another variation of the cooling structure of the gas turbine in FIG. [Figure 5C] 1. FIG. 4 is a schematic configuration diagram showing another variation of the cooling structure of the gas turbine in FIG. [Figure 6]FIG. 1 is a schematic configuration diagram of a fuel supply system 20 of a gas turbine according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. However, the configurations described as the embodiments or shown in the drawings are merely illustrative examples and are not intended to limit the scope of the present invention.

[0013] First, a cooling structure that is a part of a gas turbine that is a control target of a gas turbine control device according to at least one embodiment of the present disclosure will be described with reference to Fig. 1. Fig. 1 is a schematic configuration diagram of a cooling structure of a gas turbine according to one embodiment. In the following embodiment, a case will be described in which the cooling structure of the gas turbine 1 is the controlled object, but other structures of the gas turbine 1 may be the controlled object.

[0014] The gas turbine 1 is a device that generates combustion gas by mixing and burning combustion air and fuel, and is capable of driving a turbine. Since heat is generated during the operation of the gas turbine 1, a cooling structure is provided to prevent the temperature of the device from rising excessively.

[0015] The cooling structure has a flow path 2 through which a medium M flows for performing heat exchange with the main body of the gas turbine 1. The flow path 2 is provided at a predetermined route relative to the main body of the gas turbine 1, and the medium M flowing through the flow path 2 receives heat from the main body of the gas turbine 1 through heat exchange, thereby cooling the main body. In this embodiment, the medium M is cooling air extracted from a casing 4 of the gas turbine 1. In this embodiment, the remaining air in the casing 4 is supplied to the combustor 6 as combustion air A.

[0016] A compressor 8 for compressing the medium M is provided in the flow path 2. A data measuring unit 10 for measuring data related to the medium M flowing through the flow path 2 is provided at a predetermined position in the flow path 2 downstream of the compressor 8 (i.e., between the casing 4 and the combustor 6).

[0017] In this embodiment, the data measurement unit 10 is provided as a configuration for measuring flow rate data Df of the medium M flowing through the flow path 2. In addition to flow rate sensors FTa, FTb, and FTc for directly acquiring the flow rate data Df of the medium M, the data measurement unit 10 includes a pressure sensor PT1 and a temperature sensor TE for acquiring pressure data Dp1 and temperature data Dt of the medium M as correction data for improving the accuracy of the flow rate data Df, as will be described later.

[0018] The flow sensors FTa, FTb, and FTc included in the data measurement unit 10 are multiplexed (triple). The flow sensors FTa, FTb, and FTc are equivalent to each other, and by multiplexing, it is possible to obtain reliable flow data even if there is an error due to individual differences between sensors or a specific sensor is defective. The handling of the detection values ​​of the flow sensors FTa, FTb, and FTc is not limited, but for example, the flow data Df may be obtained by averaging the detection values ​​of each sensor, or the flow data Df may be obtained by excluding detection values ​​that deviate from a preset allowable range.

[0019] The detected pressure and temperature values ​​(pressure data Dp1 and temperature data Dt) acquired by the pressure sensor PT1 and the temperature sensor TE are treated as correction data for correcting the flow rate data Df based on the detected values ​​of the flow rate sensors FTa, FTb, and FTc.

[0020] The vehicle compartment 4 is also provided with pressure sensors PT2a, PT2b, and PT2c for detecting data (pressure data Dp2) related to the pressure of the medium M in the vehicle compartment 4. The pressure sensors PT2a, PT2b, and PT2c are identical to each other, and by multiplexing, it is possible to obtain a highly reliable pressure value even when there is an error due to an individual difference between sensors or when a specific sensor is defective. The handling of the detection values ​​of the pressure sensors PT2a, PT2b, and PT2c is not limited, and for example, the pressure data Dp2 may be obtained by averaging the detection values ​​of each sensor, or the pressure data Dp2 may be obtained by excluding detection values ​​that deviate from a preset allowable range.

[0021] Next, a gas turbine control device 100 for controlling the gas turbine 1 having the above configuration will be described. Fig. 2 is a block configuration diagram of the gas turbine control device 100 according to one embodiment, and Fig. 3 is a process flow diagram of a flow rate calculation value calculation unit in Fig. 2.

[0022] The gas turbine control device 100 is composed of, for example, a central processing unit (CPU), a random access memory (RAM), a read only memory (ROM), and a computer-readable storage medium. A series of processes for realizing various functions is stored in a storage medium or the like in the form of a program, for example, and the CPU reads this program into the RAM or the like and executes information processing and arithmetic processing to realize various functions. The program may be installed in a ROM or other storage medium in advance, may be provided in a state stored in a computer-readable storage medium, or may be distributed via wired or wireless communication means. The computer-readable storage medium may be a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like.

[0023] Specifically, the gas turbine control device 100 includes a flow rate data acquisition unit 102, a correction data acquisition unit 104, a flow rate calculation value calculation unit 106, an alternative correction data acquisition unit 108, an abnormality determination unit 110, and an interlock control unit 112.

[0024] The flow rate data acquiring unit 102 is configured to acquire flow rate data Df from the data measuring unit 10. In this embodiment, the flow rate data acquiring unit 102 acquires the flow rate data Df from the multiplexed flow rate sensors FTa, FTb, and FTc included in the data measuring unit 10. The flow rate data Df may be calculated by averaging the detection values ​​of the flow rate sensors FTa, FTb, and FTc, or may be calculated by excluding detection values ​​that deviate from a preset allowable range.

[0025] The correction data acquisition unit 104 is configured to acquire correction data from the data measurement unit 10. In this embodiment, as the correction data, temperature data Dt for temperature-correcting the flow rate data Df and pressure data Dp1 for pressure-correcting the flow rate data Df are acquired.

[0026] The flow rate calculation value calculation unit 106 is configured to calculate a flow rate calculation value Df' by correcting the flow rate data Df acquired by the flow rate data acquisition unit 102 using the correction data (temperature data Dt and pressure data Dp1) acquired by the correction data acquisition unit 104. As shown in FIG. 3, in the flow rate calculation value calculation unit 106, the temperature data Dt of the correction data acquired by the correction data acquisition unit 104 is input to a first function fx1 to calculate a corresponding temperature correction coefficient c1. The first function fx1 is prepared in advance as a characteristic function indicating the correlation between the temperature data Dt and the pressure correction coefficient c1. Moreover, the pressure data Dp1 of the correction data acquired by the correction data acquisition unit 104 is input to a second function fx2 to calculate a corresponding pressure correction coefficient c2. The second function fx2 is prepared in advance as a characteristic function indicating the correlation between the pressure data Dp1 and the pressure correction coefficient c2.

[0027] When the determination unit 110, which will be described later, determines that there is no abnormality, the flow rate data Df is multiplied by a temperature correction coefficient c1 and a pressure correction coefficient c2 to calculate a flow rate calculation value Df'. The accuracy of the flow rate calculation value Df' thus calculated is improved by correcting the flow rate data Df with the temperature data Dt and the pressure data Dp1.

[0028] The alternative correction data acquiring unit 108 is configured to acquire alternative correction data. In this embodiment, as the alternative correction data, pressure data Dp2 is acquired from pressure sensors PT2a, PT2b, and PT2c arranged upstream of the data measuring unit 10 in the flow path 2 (the pressure data Dp2 is calculated as, for example, an average value of detection values ​​of the pressure sensors PT2a, PT2b, and PT2c).

[0029] The abnormality determination unit 110 is configured to determine whether or not there is an abnormality in the sensor that acquires the correction data. This determination is performed by comparing the correction data with the alternative correction data. In this embodiment, the presence or absence of an abnormality is determined by comparing pressure data Dp1 included in the correction data with pressure data Dp2 that is the alternative correction data. Specifically, the abnormality determination is performed based on whether or not the pressure data Dp1 that is the correction data and the pressure data Dp2 that is the alternative correction data satisfy a predetermined magnitude relationship.

[0030] 1, as described above, the pressure data Dp2 acquired as the alternative correction data is acquired from the multiplexed pressure sensors PT2a, PT2b, and PT2c, and is therefore more reliable than the pressure data Dp1 acquired as the correction data from a single pressure sensor PT1. Therefore, if the pressure data Dp1, which is the correction data, does not have a predetermined magnitude relationship with the pressure data Dp2, which is the reliable alternative correction data, it can be determined that there is an abnormality in the pressure sensor PT1 from which the pressure data Dp1 is acquired.

[0031] When the abnormality determination unit 110 determines that there is an abnormality, the flow rate calculation value calculation unit 106 changes the switch SW to correct the flow rate data F using the alternative correction data instead of the correction data, thereby calculating the flow rate calculation value F'. That is, the flow rate data Df is corrected using the pressure data Dp2, which is more reliable than the pressure data Dp1. Even if an abnormality occurs in the temperature sensor TE, the temperature data Dt among the correction data is erroneously detected to be at most about 100 degrees. On the other hand, the pressure data Dp1 among the correction data has a wide measurement range from atmospheric pressure to 3 MPa, so that if an abnormality occurs, the flow rate calculation value Df' is greatly affected. This prevents the flow rate calculation value Df' from deviating significantly from the original value even if there is an abnormality in the pressure sensor PT1.

[0032] Furthermore, if the abnormality judgment unit 110 judges that there is no abnormality, as described above, in the flow calculation value calculation unit 106, the switch SW is switched and the flow calculation value Df' is calculated by correcting the flow data Df using the pressure data Dp1, which is correction data.

[0033] The interlock control unit 112 is configured to perform interlock control based on the flow rate calculation value Df' calculated by the flow rate calculation value calculation unit 106. The interlock control is performed so as to limit the operating state of the gas turbine 1 to a preset range when the flow rate calculation value Df' deviates from a preset allowable range.

[0034] Next, a specific description will be given of an abnormality determination method by the abnormality determination unit 110 for each configuration of the flow passage 2. Figures 4A to 4C are schematic configuration diagrams showing several variations of the cooling structure of the gas turbine 1 in Figure 1. In the following description, components corresponding to those in the above-described embodiment are denoted by common reference numerals, and duplicate descriptions will be omitted as appropriate.

[0035] 1, the pressure sensors PT2a, PT2b, and PT2c for acquiring alternative correction data are arranged only upstream of the first position where the data measuring unit 10 is installed, but in addition, pressure sensors PT3a, PT3b, and PT3c for acquiring alternative correction data are arranged downstream of the first position in Fig. 4A to Fig. 4C. That is, the flow path 2 is provided with the pressure sensor PT1 included in the data measuring unit 10 arranged at the first position, the multiplexed pressure sensors PT2a, PT2b, and PT2c arranged at the second position upstream of the first position, and the multiplexed pressure sensors PT3a, PT3b, and PT3c arranged at the third position downstream of the first position. It should be noted that only one of the pressure sensors PT2a, PT2b, and PT2c or the pressure sensors PT3a, PT3b, and PT3c may be used to obtain the alternative correction data.

[0036] As shown in FIG. 4A, in a configuration in which there are no other components (devices that affect the correction data) in the flow path 2, when there is no abnormality in the pressure sensor PT1, the pressure data Dp1 acquired from the pressure sensor PT1, the pressure data Dp2 acquired from the pressure sensors PT2a, PT2b, and PT2c, and the pressure data Dp3 acquired from the pressure sensors PT3a, PT3b, and PT3c have the following relationship (in this case, the pressure gradually decreases due to pressure loss from the upstream side to the downstream side). Dp2>Dp1>Dp3 (1)

[0037] On the other hand, if there is an abnormality in the pressure sensor PT1, the above formula (1) does not hold, and any one of the following relationships holds: Dp2 <Dp1 (2-1) Dp1 <Dp3 (2-2) Therefore, in the configuration of FIG. 4A, the abnormality determination unit 110 determines that there is no abnormality when formula (1) is satisfied, and determines that there is an abnormality when formula (2-1) or (2-2) is satisfied.

[0038] Next, in a configuration (similar to FIG. 1) in which a compressor 8 is located upstream of the first position in the flow path 2 as a device that affects the correction data, as shown in FIG. 4B, if there is no abnormality in the pressure sensor PT1, the pressure data Dp1 acquired from the pressure sensor PT1 and the pressure data Dp2 acquired from the pressure sensors PT2a, PT2b, and PT2c have the following relationship. Dp2×X>Dp1>Dp2 (3) Here, X is the pressure boost rate by the compressor 8.

[0039] On the other hand, if there is an abnormality in the pressure sensor PT1, the above formula (3) does not hold, and any one of the following relationships holds: Dp2×X <Dp1 (4-1) Dp1 <Dp2 (4-2) Therefore, in the configuration of FIG. 4B, the abnormality determination unit 110 determines that there is no abnormality when formula (3) is satisfied, and determines that there is an abnormality when formula (4-1) or (4-2) is satisfied.

[0040] Next, in a configuration as shown in FIG. 4C, where a compressor 8 is located downstream of the first position in the flow path 2 as a device that affects the correction data, if there is no abnormality in the pressure sensor PT1, the pressure data Dp1 acquired from the pressure sensor PT1 and the pressure data Dp3 acquired from the pressure sensors PT3a, PT3b, and PT3c have the following relationship. Dp3>Dp1>Dp3÷X1 (5―1) Dp3>Dp1>DP3×X2 (5-2) In addition, X1 is the pressure increase rate by the compressor 8, and X2 is a coefficient determined by the pressure loss in the piping.

[0041] On the other hand, if there is an abnormality in the pressure sensor PT1, the above formula (5-1) or (5-2) does not hold. Specifically, if formula (5-1) does not hold, one of the following relationships holds. Dp1 <Dp3÷X1 (6-1a) Dp3 <Dp1 (6-1b) Also, if equation (5-2) does not hold, one of the following relationships holds. Dp1 <Dp3×X2 (6-2a) Dp3 <Dp1 (6-2b) Therefore, in the configuration of FIG. 4C, the abnormality determination unit 110 determines that there is no abnormality when equations (5-1) and (5-2) are satisfied, and determines that there is an abnormality when any of equations (6-1a), (6-1b), (6-2a) or (6-2b) is satisfied.

[0042] In the above-mentioned embodiments, when an abnormality is determined by the abnormality determination unit 110, the flow rate data Df is corrected using the pressure data Dp2 (or Dp3) acquired as alternative correction data for the pressure data Dp1 among the correction data to calculate the flow rate calculation value Df'. In this way, the data targeted for the alternative correction data may be pressure data, but other data may also be targeted. As an example, in the embodiment shown in FIG. 5A to FIG. 5C, when an abnormality is determined by the abnormality determination unit 110, the flow rate data Df is corrected using the temperature data Dt2 (or Dt3) acquired as alternative correction data for the temperature data Dt1 among the correction data to calculate the flow rate calculation value Df'. FIG. 5A to FIG. 5C are schematic configuration diagrams showing other variations of the cooling structure of the gas turbine 1 of FIG. 1.

[0043] In Figures 5A to 5C, in addition to the temperature sensor TE1 included in the data measurement unit 10 installed at the first position, temperature sensors TE2a, TE2b, and TE2c are arranged upstream of the first position for acquiring temperature data Dt2 as alternative correction data, and temperature sensors TE3a, TE3b, and TE3c are arranged downstream of the first position for acquiring temperature data Dt3 as alternative correction data. It is to be noted that only one of the temperature sensors TE2a, TE2b, and TE2c or the temperature sensors TE3a, TE3b, and TE3c may be used to obtain the alternative correction data.

[0044] As shown in FIG. 5A, in a configuration in which there are no other components (devices that affect the correction data) in the flow path 2, when there is no abnormality in the temperature sensor TE1, the temperature data Dt1 acquired from the temperature sensor TE1, the temperature data Dt2 acquired from the temperature sensors TE2a, TE2b, and TE2c, and the temperature data Dt3 acquired from the temperature sensors TE3a, TE3b, and TE3c have the following relationship (in this case, the temperature gradually decreases from the upstream side to the downstream side due to heat dissipation). Dt2>Dt1>Dt3 (7)

[0045] On the other hand, if there is an abnormality in the temperature sensor TE1, the above formula (7) does not hold, and any one of the following relationships holds: Dt2 <Dt1 (8-1) Dt1 <Dt3 (8-2) Therefore, in the configuration of FIG. 5A, the abnormality determination unit 110 determines that there is no abnormality when formula (7) is satisfied, and determines that there is an abnormality when formula (8-1) or (8-2) is satisfied.

[0046] Next, in a configuration as shown in FIG. 5B, in which a heater 9 is located upstream of the first position in the flow path 2 as a device that affects the correction data, if there is no abnormality in the temperature sensor TE1, the temperature data Dt1 acquired from the temperature sensor TE1 and the temperature data Dt2 acquired from the temperature sensors TE2a, TE2b, and TE2c have the following relationship. Dt2×Y>Dt1>Dt2 (9) Incidentally, Y is the rate of temperature rise by the heater 9.

[0047] On the other hand, if there is an abnormality in the temperature sensor TE1, the above formula (9) does not hold, and any of the following relationships holds: Dt2×Y <Dt1 (10-1) Dt1 <Dt2 (10-2) Therefore, in the configuration of FIG. 5B, the abnormality determination unit 110 determines that there is no abnormality when formula (9) is satisfied, and determines that there is an abnormality when formula (10-1) or (10-2) is satisfied.

[0048] Next, in a configuration as shown in FIG. 5C, in which a heater 9 is located downstream of the first position in the flow path 2 as a device that affects the correction data, if there is no abnormality in the temperature sensor TE1, the temperature data Dt1 acquired from the temperature sensor TE1 and the temperature data Dt3 acquired from the temperature sensors TE3a, TE3b, and TE3c have the following relationship. Dt3>Dt1>Dt3÷Y1 (11-1) Dt3>Dt1>Dt3×Y2 (11-2) Incidentally, Y1 is the rate of temperature rise by the heater 9, and Y2 is a coefficient determined by the heat loss taking into consideration the length and material of the piping, etc.

[0049] On the other hand, if there is an abnormality in the temperature sensor TE1, the above formula (11-1) or (11-2) does not hold. Specifically, if formula (11-1) does not hold, one of the following relationships holds. Dt1 <Dt3÷Y1 (12-1a) Dt3 <Dt1 (12-1b) Also, if equation (11-2) does not hold, one of the following relationships holds: Dt1 <Dt3×Y2 (12-2a) Dt3 <Dt1 (12-2b) Therefore, in the configuration of FIG. 5C, the abnormality determination unit 110 determines that there is no abnormality when equations (11-1) and (11-2) are satisfied, and determines that there is an abnormality when any of equations (12-1a), (12-1)b, (12-2a) or (12-2b) is satisfied.

[0050] In each of the above embodiments, the cooling structure of the gas turbine 1 is the control target, but other structures of the gas turbine 1 may be the control target. In the following embodiment, a case where the fuel supply system 20 of the gas turbine 1 is adopted as the control target will be described as an example.

[0051] 6 is a schematic configuration diagram of a fuel supply system 20 of a gas turbine 1 according to one embodiment. The fuel supply system 20 handles a mixed fuel obtained by mixing a first fuel F1 and a second fuel F2 as a fuel to be supplied to the combustor 6. The second fuel F2 is a fuel having a higher combustion speed than the first fuel F1. Furthermore, the second fuel F2 is a fuel having a lower calorific value per unit volume than the first fuel F1. In this embodiment, the first fuel F1 is liquefied natural gas (LNG), and the second fuel F2 is hydrogen gas.

[0052] The first fuel F1 is supplied via a first fuel supply line 24 connected to a first fuel supply source 22. The second fuel F2 is supplied via a second fuel supply line 28 connected to a second fuel supply source 26. The first fuel supply line 24 and the second fuel supply line 28 join at a junction 30 and are connected to the combustor 6.

[0053] In the fuel supply system 20 having the above configuration, a data measurement unit 10 for measuring the second fuel F2 is provided in the second fuel supply line 28. Furthermore, pressure sensors PT2a, PT2b, and PT2c for measuring alternative correction data are provided upstream of the data measurement unit 10, and pressure sensors PT3a, PT3b, and PT3c for measuring alternative correction data are provided downstream of the data measurement unit 10.

[0054] When the gas turbine 1 having the fuel supply system 20 having such a configuration is to be controlled, the flow data acquisition unit 102 of the gas turbine control device 100 acquires the flow data Df (detection values ​​of the flow sensors FTa, FTb, FTc) from the data measurement unit 10, and the correction data acquisition unit 104 acquires the pressure data Dp1 and the temperature data Dt as correction data. Furthermore, the alternative correction data acquisition unit 108 acquires the pressure data Dp2 from the pressure sensors PT2a, PT2b, PT2c or the pressure data Dp3 from the pressure sensors PT3a, PT3b, PT3c as alternative correction data. Each of the data acquired in this manner is input to the flow calculation value calculation unit 106 as described above, and is used to calculate the flow calculation value Df'.

[0055] As a result, even if there is an abnormality in the pressure sensor PT1 included in the data measurement unit 10, a highly reliable flow rate calculation value Df' can be obtained by using the pressure data Dp2 from the pressure sensors PT2a, PT2b, and PT2c or the pressure data Dp3 from the pressure sensors PT3a, PT3b, and PT3c as alternative correction data. As a result, the interlock control unit 112 can appropriately perform interlock control using the flow rate calculation value Df', effectively preventing malfunction due to a sensor abnormality.

[0056] In this embodiment, an example has been given of the case where interlock control is performed based on the flow rate calculation value Df′ of the second fuel F2 in the second fuel supply line 28 of the fuel supply system 20, but the same can be applied when calculating the flow rate calculation value of the first fuel F1 in the first fuel supply line 24.

[0057] As described above, according to each of the above embodiments, when there is an abnormality in the correction data due to a sensor malfunction, etc., alternative correction data is used instead of the correction data used for correction to obtain the flow rate calculation value Df'. As a result, even when there is an abnormality in the correction data, the deviation of the flow rate calculation value Df' from the normal value is suppressed, so that the possibility of the interlock control malfunctioning can be effectively reduced.

[0058] In addition, within the scope of the present disclosure, the components in the above-described embodiments may be replaced with well-known components as appropriate, and the above-described embodiments may be combined as appropriate.

[0059] In the above formulas, the pressure rise rate X1, the pressure loss X2, the temperature rise rate Y1, and the heat loss Y2 are expressed using division and multiplication, but they may be taken into consideration using addition and subtraction using specific pressure and temperature values.

[0060] The contents described in each of the above embodiments can be understood, for example, as follows.

[0061] (1) A gas turbine control device according to one aspect includes: a data measurement unit that is disposed at a predetermined position in a flow path through which a medium used in the gas turbine flows, the data measurement unit including a flow rate data detection sensor for detecting flow rate data of the medium, and a correction data detection sensor for detecting correction data for correcting the flow rate data; an interlock control unit for performing an interlock control of the gas turbine based on a flow rate calculation value obtained by correcting the flow rate data with the correction data; A gas turbine control device for controlling the gas turbine, comprising: an alternative correction data detection unit that is disposed upstream or downstream of the predetermined position in the flow path and detects alternative correction data for the correction data; an abnormality determination unit for determining whether or not the correction data has an abnormality by comparing the correction data with the alternative correction data; Equipped with When the abnormality determination unit determines that the abnormality exists, the flow rate calculation value is calculated by correcting the flow rate data using the alternative correction data instead of the correction data.

[0062] According to the above aspect (1), when there is an abnormality in the correction data, the alternative correction data is used instead of the correction data used for correction to obtain the flow rate calculation value. This makes it possible to effectively reduce the possibility of the interlock control malfunctioning because the deviation of the flow rate calculation value from the normal value is suppressed even when there is an abnormality in the correction data.

[0063] (2) In another embodiment, in the above embodiment (1), The alternative correction data detector is multiplexed.

[0064] According to the above aspect (2), the alternative correction data is detected by a multiplexed configuration, and is therefore acquired as a value with higher reliability than the correction data. As a result, when it is determined that the correction data is abnormal, the flow rate data is corrected using the alternative correction data with higher reliability than the correction data, thereby effectively suppressing the deviation of the flow rate calculation value from the normal value.

[0065] (3) In another embodiment, in the above embodiment (1) or (2), The flow rate data detection sensors are multiplexed.

[0066] According to the above aspect (3), the flow rate data to be corrected is detected by a multiplexed configuration using the correction data or the alternative correction data.

[0067] (4) In another embodiment, in any one of the above (1) to (3), The abnormality determination unit determines that an abnormality exists when a device for increasing the correction data is not located between the specified position and the alternative correction data detection unit and the correction data is larger than the alternative correction data detected by the alternative correction data detection unit located upstream of the specified position, or when the correction data is smaller than the alternative correction data detected by the alternative correction data detection unit located downstream of the specified position.

[0068] According to the above aspect (4), in the case where no device that may cause an increase in the correction data is disposed between a predetermined position in the flow path and the alternative correction data detection unit, the presence or absence of an abnormality in the correction data can be suitably determined based on the magnitude relationship between the correction data and the alternative correction data.

[0069] (5) In another embodiment, in any one of the above (1) to (3), The abnormality determination unit determines that an abnormality exists when a device for increasing the correction data is located between the specified position and the alternative correction data detection unit located upstream of the specified position, and the correction data is larger than the result of adding or multiplying the alternative correction data detected by the alternative correction data detection unit located upstream of the specified position using the numerical value of the increase by the device, or when the correction data is smaller than the alternative correction data detected by the alternative correction data detection unit located downstream of the specified position.

[0070] According to the above aspect (5), in the case where no device that may cause an increase in the correction data is disposed between a predetermined position in the flow path and the alternative correction data detection unit located upstream of the predetermined position, the presence or absence of an abnormality in the correction data can be suitably determined based on the magnitude relationship between the correction data and the alternative correction data.

[0071] (6) In another embodiment, in the above embodiment (5), The increase in value is the rate at which the pressure or temperature of the medium is increased by the device.

[0072] According to the above aspect (6), the presence or absence of an anomaly in the correction data can be suitably determined by taking into consideration the pressure rise rate or temperature rise rate of the medium caused by the device.

[0073] (7) In another embodiment, in any one of the above (1) to (3), The abnormality determination unit determines that an abnormality exists when a device for increasing the correction data is located between the specified position and the alternative correction data detection unit located downstream of the specified position, and the correction data is larger than the result of dividing or subtracting the alternative correction data detected by the alternative correction data detection unit located downstream of the specified position by the numerical value of the increase by the device, or when the correction data is larger than the result of accumulating the losses in the flow path, or when the correction data is larger than the alternative correction data detected by the alternative correction data detection unit located downstream of the specified position.

[0074] According to the above aspect (7), in the case where no device that may cause an increase in the correction data is disposed between a predetermined position in the flow path and the alternative correction data detection unit downstream of the predetermined position, the presence or absence of an abnormality in the correction data can be suitably determined based on the magnitude relationship between the correction data and the alternative correction data.

[0075] (8) In another embodiment, in the above embodiment (7), The value of the increase is a coefficient determined based on the rate of temperature rise or pressure rise of the medium by the device, or the heat or pressure loss of the flow path.

[0076] According to the above aspect (8), by taking into consideration a coefficient determined based on the temperature rise rate or pressure rise rate of the medium by the device, or the heat or pressure loss of the flow path, it is possible to suitably determine the presence or absence of an abnormality in the correction data.

[0077] (9) In another embodiment, in any one of the above (1) to (8), The device further includes an alarm output unit for outputting an alarm when the abnormality determination unit determines that there is an abnormality.

[0078] According to the above aspect (9), when it is determined that there is an abnormality in the correction data, a warning to that effect is output, so that the operator can be promptly notified.

[0079] (10) In another embodiment, in any one of the above (1) to (9), The correction data is the pressure or temperature of the medium.

[0080] According to the above aspect (10), the pressure or temperature of the medium is acquired as correction data for correcting the flow rate data. This makes it possible to perform interlock control based on a highly reliable flow rate calculation value by correcting the flow rate data from the perspective of the pressure or temperature of the medium.

[0081] (11) In another embodiment, in any one of the above (1) to (10), The medium is a compressible fluid.

[0082] According to the above aspect (11), it is possible to effectively reduce the possibility of malfunction in interlock control that is performed based on a flow rate calculation value obtained by correcting flow rate data in a flow path through which a medium, which is a compressible fluid such as cooling air or fuel for a gas turbine, flows.

[0083] (12) In another embodiment, in any one of the above (1) to (11), The medium is cooling air extracted from a casing of the gas turbine for cooling a combustor provided in the gas turbine.

[0084] According to the above aspect (12), in a gas turbine having a configuration in which cooling air for cooling a combustor provided in the gas turbine is extracted from a casing, it is possible to effectively reduce the possibility of malfunction occurring in the interlock control that is performed based on a flow rate calculation value obtained by correcting flow rate data of the cooling air flowing through a flow path.

[0085] (13) In another embodiment, in any one of the above (1) to (11), The medium is fuel supplied to a combustor included in the gas turbine.

[0086] According to the above aspect (13), it is possible to effectively reduce the possibility of malfunction occurring in the interlock control that is performed based on the flow rate calculation value obtained by correcting the fuel flow rate data in the flow path through which the fuel flows and is supplied to the combustor equipped in the gas turbine.

[0087] (14) In another embodiment, in any one of the above (1) to (13), the alternative correction data is a vehicle interior pressure upstream of the predetermined position, The correction data is a pressure of cooling air for cooling a combustor included in the gas turbine.

[0088] According to the above aspect (14), when the pressure of the cooling air is used as the correction data, the cabin pressure is used as the alternative correction data. The pressure of the cooling air is in a relationship where the pressure of the cooling air is increased from the cabin pressure, and therefore the two pressures are pressures at locations that are systematically close to each other. Therefore, it is possible to reduce data deviation when the alternative correction data is used instead of the correction data.

[0089] (15) In another embodiment, in any one of the above (1) to (14), The correction data is measured by a single instrument.

[0090] According to the above aspect (15), the measurement of the correction data is performed using a single instrument, thereby making it possible to effectively reduce costs.

[0091] (16) A gas turbine control method according to one aspect includes the steps of: a data measurement unit that is disposed at a predetermined position in a flow path through which a medium used in the gas turbine flows, the data measurement unit including a flow rate data detection sensor for detecting flow rate data of the medium, and a correction data detection sensor for detecting correction data for correcting the flow rate data; an interlock control unit for performing an interlock control of the gas turbine based on a flow rate calculation value obtained by correcting the flow rate data with the correction data; A gas turbine control method for controlling the gas turbine, comprising: a step of detecting an alternative correction data for the correction data, the alternative correction data being disposed upstream or downstream of the predetermined position in the flow path; determining whether the correction data is abnormal by comparing the correction data with the alternative correction data; Equipped with When the abnormality determination unit determines that the abnormality exists, the flow rate calculation value is calculated by correcting the flow rate data using the alternative correction data instead of the correction data.

[0092] According to the above aspect (16), when there is an abnormality in the correction data, the alternative correction data is used instead of the correction data used for the correction to obtain the flow rate calculation value. This makes it possible to effectively reduce the possibility of the interlock control malfunctioning because the deviation of the flow rate calculation value from the normal value is suppressed even when there is an abnormality in the correction data.

[0093] (17) A gas turbine control program according to one embodiment of the present invention comprises: a data measurement unit that is disposed at a predetermined position in a flow path through which a medium used in the gas turbine flows, the data measurement unit including a flow rate data detection sensor for detecting flow rate data of the medium, and a correction data detection sensor for detecting correction data for correcting the flow rate data; an interlock control unit for performing an interlock control of the gas turbine based on a flow rate calculation value obtained by correcting the flow rate data with the correction data; A gas turbine control program for controlling the gas turbine, comprising: A computer device includes: a step of detecting an alternative correction data for the correction data, the alternative correction data being disposed upstream or downstream of the predetermined position in the flow path; determining whether the correction data is abnormal by comparing the correction data with the alternative correction data; It is possible to execute When the abnormality determination unit determines that the abnormality exists, the flow rate calculation value is calculated by correcting the flow rate data using the alternative correction data instead of the correction data.

[0094] According to the above aspect (17), when there is an abnormality in the correction data, the alternative correction data is used instead of the correction data used for the correction to obtain the flow rate calculation value. This makes it possible to effectively reduce the possibility of the interlock control malfunctioning because the deviation of the flow rate calculation value from the normal value is suppressed even when there is an abnormality in the correction data. [Explanation of symbols]

[0095] 1. Gas turbine 2 Flow Path 4 Cabin 6. Combustor 8. Compressor 9 Heater 10 Data measurement section 20 Fuel supply system 22 1st fuel supply source 24 First fuel supply line 26 Second fuel source 28 Second fuel supply line 30 Confluence 100 Gas turbine control device 102 Flow rate data acquisition unit 104 Correction data acquisition unit 106 Flow rate calculation unit 108 Alternative correction data acquisition unit 110 Abnormality determination section 112 Interlock control section

Claims

1. a data measurement unit that is disposed at a predetermined position in a flow path through which a medium used in the gas turbine flows, the data measurement unit including a flow rate data detection sensor for detecting flow rate data of the medium, and a correction data detection sensor for detecting correction data for correcting the flow rate data; an interlock control unit for performing an interlock control of the gas turbine based on a flow rate calculation value obtained by correcting the flow rate data with the correction data; A gas turbine control device for controlling the gas turbine, comprising: an alternative correction data detection unit that is disposed upstream or downstream of the predetermined position in the flow path and detects alternative correction data for the correction data; an abnormality determination unit for determining whether or not the correction data has an abnormality by comparing the correction data with the alternative correction data; Equipped with a gas turbine control device, wherein the flow rate calculation value is calculated by correcting the flow rate data using the alternative correction data instead of the correction data when the abnormality determination unit determines that the abnormality exists.

2. The gas turbine control device according to claim 1 , wherein the alternative correction data detector is multiplexed.

3. The gas turbine control device according to claim 1 or 2, wherein the flow rate data detection sensors are multiplexed.

4. 3. The gas turbine control device according to claim 1, wherein the abnormality determination unit determines that the abnormality exists when a device for increasing the correction data is not disposed between the predetermined position and the alternative correction data detection unit, and when the correction data is larger than the alternative correction data detected by the alternative correction data detection unit disposed upstream of the predetermined position, or when the correction data is smaller than the alternative correction data detected by the alternative correction data detection unit disposed downstream of the predetermined position.

5. 3. The gas turbine control device according to claim 1, wherein the abnormality determination unit determines that the abnormality exists when a device for increasing the correction data is disposed between the predetermined position and the alternative correction data detection unit located upstream of the predetermined position, and when the correction data is larger than a result of adding or multiplying the alternative correction data detected by the alternative correction data detection unit located upstream of the predetermined position using a numerical value of an increase by the device, or when the correction data is smaller than the alternative correction data detected by the alternative correction data detection unit located downstream of the predetermined position.

6. The gas turbine control device according to claim 5 , wherein the numerical value of the increase is a pressure increase rate or a temperature increase rate of the medium by the device.

7. 3. The gas turbine control device according to claim 1, wherein the abnormality determination unit determines that the abnormality exists when a device for increasing the correction data is disposed between the predetermined position and the alternative correction data detection unit located downstream of the predetermined position, and the correction data is larger than a result of dividing or subtracting the alternative correction data detected by the alternative correction data detection unit located downstream of the predetermined position by a numerical value of an increase by the device, or is larger than a result of accumulating losses in the flow path, or when the correction data is larger than the alternative correction data detected by the alternative correction data detection unit located downstream of the predetermined position.

8. The gas turbine control device according to claim 7 , wherein the numerical value of the increase is a coefficient determined based on a temperature increase rate or a pressure increase rate of the medium by the device, or heat or a pressure loss in the flow path.

9. 3. The gas turbine control device according to claim 1, further comprising: an alarm output unit that outputs an alarm when the abnormality determination unit determines that there is an abnormality.

10. The gas turbine control device according to claim 1 or 2, wherein the correction data is a pressure or a temperature of the medium.

11. The gas turbine control device according to claim 1 or 2, wherein the medium is a compressible fluid.

12. 3. The gas turbine control device according to claim 1, wherein the medium is cooling air extracted from a casing of the gas turbine for cooling a combustor included in the gas turbine.

13. 3. The gas turbine control device according to claim 1, wherein the medium is a fuel supplied to a combustor included in the gas turbine.

14. the alternative correction data is a vehicle interior pressure upstream of the predetermined position, 3. The gas turbine control device according to claim 1, wherein the correction data is a pressure of cooling air for cooling a combustor included in the gas turbine.

15. The gas turbine control device according to claim 1 or 2, wherein the correction data is measured by a single instrument.

16. a data measurement unit that is disposed at a predetermined position in a flow path through which a medium used in the gas turbine flows, the data measurement unit including a flow rate data detection sensor for detecting flow rate data of the medium, and a correction data detection sensor for detecting correction data for correcting the flow rate data; an interlock control unit for performing an interlock control of the gas turbine based on a flow rate calculation value obtained by correcting the flow rate data with the correction data; A gas turbine control method for controlling the gas turbine, comprising: a step of detecting an alternative correction data for the correction data, the alternative correction data being disposed upstream or downstream of the predetermined position in the flow path; determining whether the correction data is abnormal by comparing the correction data with the alternative correction data; Equipped with a gas turbine control method, wherein, when the abnormality determination unit determines that the abnormality exists, the flow rate calculation value is calculated by correcting the flow rate data using the alternative correction data instead of the correction data.

17. a data measurement unit that is disposed at a predetermined position in a flow path through which a medium used in the gas turbine flows, the data measurement unit including a flow rate data detection sensor for detecting flow rate data of the medium, and a correction data detection sensor for detecting correction data for correcting the flow rate data; an interlock control unit for performing an interlock control of the gas turbine based on a flow rate calculation value obtained by correcting the flow rate data with the correction data; A gas turbine control program for controlling the gas turbine, comprising: A computer device includes: a step of detecting an alternative correction data for the correction data, the alternative correction data being disposed upstream or downstream of the predetermined position in the flow path; determining whether the correction data is abnormal by comparing the correction data with the alternative correction data; It is possible to execute a gas turbine control program for calculating the flow rate calculation value by correcting the flow rate data using the alternative correction data instead of the correction data when the abnormality determination unit determines that there is an abnormality.

Images