JP5922538B2 - Gas turbine control device, gas turbine, and gas turbine control method - Google Patents

Description

  The present invention relates to a gas turbine control device, a gas turbine, and a gas turbine control method.

  In recent years, due to a demand for diversification of energy, driving of a gas turbine using gas fuel such as coal gas or blast furnace gas containing fine particles, sulfur hydrogen, and the like is required. However, such fine particles, sulfur hydrogen, etc. in the gas may interfere with the sound control function of the gas turbine by sticking and adhering to the sliding portion of the fuel valve for supplying the fuel to the combustor. is there.

For this reason, for example, Patent Document 1 discloses a control device for a gas turbine that can check the operation of a pressure regulating valve even during load operation.
Specifically, the gas turbine control device disclosed in Patent Document 1 is a proportional integrator that performs a proportional integration operation so that the pressure deviation between the fuel pressure setting value and the upstream pressure of the flow rate adjustment valve becomes zero. Outputs the valve opening of the pressure adjustment valve to the low-value priority circuit and the valve opening based on the fully closed command signal that causes the valve opening of the pressure adjusting valve to be fully closed when the operation confirmation command signal is issued Is output to the low value priority circuit, and the valve opening degree of the pressure regulating valve is controlled based on the output of the low value priority circuit.

Japanese Patent Laid-Open No. 1-178731

  However, the gas turbine control device disclosed in Patent Literature 1 is complicated in configuration because it is necessary to separately calculate the valve opening for performing the operation check.

  Moreover, since the control apparatus of the gas turbine currently disclosed by patent document 1 outputs the valve opening degree for confirming the operation | movement of a pressure regulating valve directly to a pressure regulating valve, the flow regulation of the change of a pressure regulating valve is carried out. It cannot be reflected in the valve, and a delay occurs in the control of the flow rate adjusting valve accompanying the change of the pressure adjusting valve. For this reason, the gas turbine control device disclosed in Patent Document 1 also has a problem that the followability to the load of the output of the gas turbine, that is, the generator, is poor when the operation of the pressure regulating valve is confirmed. .

  The present invention has been made in view of such circumstances, and a gas turbine control device and a gas turbine that enable operation confirmation of a pressure regulating valve when a load is controlled to be constant with a simple configuration. And it aims at providing the control method of a gas turbine.

  In order to solve the above problems, the gas turbine control device, gas turbine, and gas turbine control method of the present invention employ the following means.

  A control device for a gas turbine according to a first aspect of the present invention includes a combustor that burns fuel to generate combustion gas, a pressure adjustment valve that adjusts the pressure of fuel supplied to the combustor, and supplies the combustor. A control device for a gas turbine comprising a flow rate adjustment valve for adjusting a flow rate of fuel and a turbine driven by combustion gas generated by the combustor, wherein a measured value of the pressure of fuel flowing through the flow rate adjustment valve A calculating means for calculating a difference from a set value of a predetermined pressure, a pressure regulating control means for controlling an opening of the pressure adjusting valve based on the difference calculated by the calculating means, and the pressure adjustment Bias generating means for generating a bias value to be added to the set value of the pressure input to the calculating means when the operation of the valve is confirmed.

The control device according to this configuration includes a combustor that burns fuel to generate combustion gas, a pressure adjustment valve that adjusts the pressure of fuel supplied to the combustor, and a fuel flow rate adjustment that adjusts the flow rate of fuel supplied to the combustor. And a control device for a gas turbine including a turbine driven by combustion gas generated by a combustor.
Then, the control device calculates a difference between the measured value of the pressure of the fuel flowing through the flow rate adjustment valve and a preset value of the pressure by the calculation means, and adjusts the opening of the pressure adjustment valve based on the difference. Control by valve control means.

  Here, when the operation of the pressure regulating valve is confirmed, a bias value is generated by the bias generating means to be added to a predetermined pressure setting value input to the calculating means. As a result, even when the load of the gas turbine is constant, the opening of the pressure adjustment valve changes as the pressure set value changes, so that the operation of the pressure adjustment valve can be confirmed.

  Therefore, according to this configuration, it is possible to check the operation of the pressure regulating valve with a simple configuration when the control is performed with a constant load.

  In the first aspect, it is preferable to control the opening degree of the flow rate adjusting valve based on a set value of the pressure to which the bias value is added.

In this configuration, when the operation of the pressure regulating valve is checked, the opening of the pressure regulating valve is changed based on the pressure set value to which the bias value is added, so the opening of the pressure regulating valve is not changed directly. . That is, this configuration can use the set value of the pressure to which the bias value is added for controlling the opening degree of the flow regulating valve.
In this configuration, when the operation of the pressure regulating valve is checked, the opening degree of the flow regulating valve is controlled based on the pressure setting value to which the bias value is added. For this reason, since the opening degree of the flow rate adjustment valve is corrected in advance based on the change in the set value of the pressure, this configuration is capable of following the output of the generator with respect to the load when checking the operation of the pressure adjustment valve. Can be improved.

  In the first aspect, the Cv value of the flow rate adjusting valve is calculated, the opening degree of the flow rate adjusting valve is calculated based on the Cv value, and the pressure setting value to which the bias value is added is determined. It is preferable to multiply the correction coefficient by the opening degree of the flow rate adjusting valve or the Cv value.

  According to this configuration, it is possible to improve the followability of the output of the generator with respect to the load when the operation of the pressure regulating valve is confirmed with a simple configuration.

  In the first aspect, it is preferable to calculate a Cv value of the flow rate adjusting valve based on a set value of the pressure to which the bias value is added.

  According to this configuration, it is possible to improve the followability of the output of the generator with respect to the load when the operation of the pressure regulating valve is confirmed with a simpler configuration.

  In the first aspect, it is preferable that the bias value returns to 0 after changing from 0 to a first predetermined value, and then returns to 0 after changing to a second predetermined value having a sign different from that of the first predetermined value.

  According to this configuration, the opening of the pressure regulating valve changes in the opening direction and the closing direction, so that the operation of the pressure regulating valve can be confirmed more reliably and the opening of the pressure regulating valve can be changed to confirm the operation. Even if it is made, since the opening degree is restored again, the fluctuation in the output of the generator accompanying the confirmation of the operation of the pressure regulating valve can be reduced.

  A gas turbine according to a second aspect of the present invention includes a combustor that burns fuel to generate combustion gas, a pressure adjustment valve that adjusts a pressure of fuel supplied to the combustor, and fuel that is supplied to the combustor. A flow rate adjusting valve that adjusts the flow rate of the gas, a turbine that is driven by the combustion gas generated by the combustor, and the control device described above.

  A gas turbine control method according to a third aspect of the present invention includes a combustor that combusts fuel to generate combustion gas, a pressure adjustment valve that adjusts a pressure of fuel supplied to the combustor, and supplies the combustor. A control method of a gas turbine comprising a flow rate adjustment valve for adjusting a flow rate of fuel and a turbine driven by combustion gas generated by the combustor, wherein the bias value is used when confirming the operation of the pressure adjustment valve. And a second step of calculating a difference between a predetermined pressure set value to which the bias value is added and a measured value of the pressure of the fuel flowing through the flow rate adjustment valve, and And a third step of controlling the opening of the pressure regulating valve based on the difference.

  According to the present invention, there is an excellent effect that the operation of the pressure regulating valve can be confirmed with a simple configuration when the load is controlled at a constant level.

1 is a configuration diagram of a gas turbine according to a first embodiment of the present invention. It is a block diagram which shows the electric constitution of the control apparatus of the gas turbine which concerns on 1st Embodiment of this invention. It is a block diagram of the bias generator which concerns on 1st Embodiment of this invention. It is a graph which shows the bias value which concerns on 1st Embodiment of this invention. It is a block diagram which shows the electric constitution of the control apparatus of the gas turbine which concerns on 2nd Embodiment of this invention. It is a block diagram which shows the electric constitution of the control apparatus of the gas turbine which concerns on 3rd Embodiment of this invention. It is a block diagram of the gas turbine which concerns on other embodiment of this invention.

  Hereinafter, an embodiment of a gas turbine control device, a gas turbine, and a gas turbine control method according to the present invention will be described with reference to the drawings.

[First Embodiment]
FIG. 1 is a configuration diagram of a gas turbine 10 according to a first embodiment of the present invention.

  The gas turbine 10 includes a turbine 12, a compressor 14, and a combustor 16.

  The compressor 14 is driven by the rotating shaft 18 to compress the air taken in from the air intake port and generate compressed air. An inlet guide vane (IGV) 20 that controls the flow rate of air guided to the compressor 14 is provided at the inlet of the compressor 14.

  The combustor 16 injects fuel into the compressed air introduced from the compressor 14 to generate high-temperature and high-pressure combustion gas.

  The turbine 12 is rotationally driven by the combustion gas generated in the combustor 16.

  The turbine 12, the compressor 14, and the generator 30 are connected by the rotating shaft 18, and the rotational driving force generated in the turbine 12 is transmitted to the compressor 14 and the generator 30 by the rotating shaft 18. Then, the generator 30 generates power by the rotational driving force of the turbine 12.

The combustor 16 is provided with a pilot nozzle and a main nozzle. A plurality of main nozzles (for example, eight, not shown) are provided so as to surround the pilot nozzle. The pilot nozzle is supplied with pilot fuel whose pressure difference before and after the flow rate adjusting valve 36P is adjusted by the pressure adjusting valve 34P and whose flow rate is adjusted by the flow rate adjusting valve 36P. On the other hand, the main nozzle is supplied with the main fuel whose flow rate is adjusted by the flow rate adjusting valve 36M after the differential pressure before and after the flow rate adjusting valve 36M is adjusted by the pressure adjusting valve 34M. Is done.
The combustor 16 mixes and burns pilot fuel and compressed air supplied from the pilot nozzle, and mixes and burns main fuel and compressed air supplied from the main nozzle.

  In the following description, when the pressure regulating valves 34P and 34M are not distinguished, the suffixes P and M are omitted, and when the flow regulating valves 36P and 36M are not distinguished, the suffixes P and M are omitted. M is omitted.

  The gas turbine 10 according to the first embodiment measures the flow regulating valve differential pressure by the pressure measuring unit 38 and controls the opening degree of the pressure regulating valve 34 based on the measured flow regulating valve differential pressure (hereinafter referred to as “difference”). It is called “pressure regulation control”. In FIG. 1, only the control for the pressure adjustment valve 34P is shown, but the same applies to the pressure adjustment valve 34M.

  Control of the valve opening degree of the pressure adjustment valve 34 (hereinafter referred to as “pressure adjustment valve opening degree”) and control of the valve opening degree of the flow rate adjustment valve 36 (hereinafter referred to as “flow adjustment valve opening degree”) are as follows: This is performed by the control device 50 shown in FIG. Note that FIG. 2 shows only one system block diagram for calculating the pressure control valve opening and the flow control valve opening. However, the control device 50 includes a pressure adjusting valve 34P and a flow rate adjusting valve 36P. A similar configuration is provided for each combination of the pressure adjustment valve 34M and the flow rate adjustment valve 36M.

  The control device 50 includes, for example, a CPU (Central Processing Unit), a RAM (Random Access Memory), a computer-readable recording medium, and the like, and a series of processes for realizing various functions are, for example, Various functions are realized by the program being recorded in a recording medium or the like in the form of a program, and the CPU reading this program into a RAM or the like and executing information processing / calculation processing.

  The control device 50 includes a flow adjustment valve opening calculation unit 52 for controlling the opening of the flow rate adjustment valve 36 and a pressure adjustment valve opening calculation unit 54 for controlling the opening of the pressure adjustment valve 34. Yes.

The flow control valve opening calculation unit 52 acquires a state quantity related to the gas turbine 10 as an input signal, and controls the flow rate of fuel supplied to the combustor 22 based on the input signal. Signal).
Specifically, the load control calculation unit 56 calculates the CSO corresponding to the load and outputs it to the low value selection unit 62, and the rotation speed control calculation unit 58 calculates the CSO corresponding to the rotation speed of the turbine 12. The temperature control calculation unit 60 calculates the CSO corresponding to the exhaust gas temperature and the blade path temperature of the turbine 12 and outputs the CSO to the low value selection unit 62. The load control calculation unit 56, the rotation speed control calculation unit 58, and the temperature control calculation unit 60, which are means for calculating the CSO, are examples, and other means may be used to calculate the CSO. You may calculate CSO using a part.

  The low value selection unit 62 selects the smallest CSO among the input CSOs and outputs the selected CSO to the fuel flow rate calculation unit 64.

  The fuel flow rate calculation unit 64 outputs the value of the fuel flow rate corresponding to the input CSO to the Cv value calculation unit 66 based on, for example, data indicating the relationship between the CSO and the fuel flow rate in advance.

  The Cv value calculation unit 66 calculates a Cv value (numerical value indicating valve capacity) based on the input fuel flow value, fuel temperature, and flow control valve pressure using a predetermined calculation formula, and opens the valve. Output to the degree calculator 68. The flow control valve pressure may be a flow control valve differential pressure measured by the pressure measuring unit 38 or a set value of the flow control valve differential pressure.

  For example, the valve opening calculator 68 calculates the valve opening (%) corresponding to the input Cv value based on the data indicating the relationship between the Cv value and the valve opening of the flow control valve 36 in advance. To 36.

  On the other hand, the pressure adjustment valve opening calculation unit 54 includes a subtraction unit 70, a pressure adjustment control unit 72, and a bias generation unit 74.

  The subtracting unit 70 measures a measured value of the pressure of the fuel flowing through the flow rate adjusting valve 36 (hereinafter referred to as “flow-regulated valve pressure measured value”) and a predetermined pressure setting value (hereinafter referred to as “flow-regulated valve pressure setting value”). ")") Is calculated. In the first embodiment, the flow valve differential pressure measured by the pressure measurement unit 38 is the flow valve pressure measurement value.

  Based on the difference calculated by the subtracting unit 70, the pressure regulating valve control unit 72 controls the valve opening degree (%) of the pressure regulating valve 34 (for example, PI control). That is, the pressure regulation control unit 72 according to the first embodiment calculates the valve opening degree by PI control and outputs the calculated valve opening degree to the pressure regulating valve 34.

  The bias generation unit 74 generates a bias value to be added to the flow control valve pressure setting value input to the subtraction unit 70 when the operation of the pressure adjustment valve 34 is confirmed. That is, when the operation of the pressure adjustment valve 34 is confirmed, the flow control valve pressure setting is input to the subtraction unit 70 after the bias value is added by the addition unit 76.

FIG. 3 is an example of a configuration diagram of the bias generator 74.
The bias generation unit 74 includes a function generation unit 80, a zero value generation unit 82, a push button switch 84, and an output unit 86.

The function generator 80 generates a bias value.
FIG. 4 is an example of a graph showing the bias value generated from the function generator 80.
As shown in FIG. 4, the bias value changes from 0 to the first bias value, and then returns to 0. Thereafter, the bias value changes to the second bias value having a sign different from that of the first bias value, and then returns to 0.
In the example of FIG. 4, the first bias value has a minus sign, the second bias value has a plus sign, and the absolute values of the first bias value and the second bias value are the same value. The sign of the first bias value is positive and the sign of the second bias value is negative, and the absolute values of the first bias value and the second bias value may be different.

  The zero value generator 82 generates a 0 (zero) value.

  The push button switch 84 sets the value to be output from the output unit 86 as the bias value from the function generation unit 80 or the 0 value from the zero value generation unit 82. That is, the bias value is output from the output unit 86 when the pushbutton switch 84 is operated and is turned on, and the zero value is output from the output unit 86 when the pushbutton switch 84 is turned off.

Next, the operation of the control device 50 for confirming the operation of the pressure regulating valve 34 when the gas turbine 10 is controlled with a constant load will be described.
Conventionally, when the gas turbine 10 is controlled with a constant load and the fuel supply pressure is constant, the opening degree of the pressure regulating valve 34 is constant, and it is determined whether the pressure regulating valve 34 is functioning normally. Can not. Therefore, the control device 50 according to the first embodiment confirms the operation of the pressure adjustment valve 34 as described below.

When the flow control valve opening degree calculation unit 52 confirms the operation of the pressure adjustment valve 34, the push button switch 84 is pressed by the operator, and the output unit 86 is turned on. Thereby, the function generator 80 generates a bias value as shown in FIG. 4, for example, and the bias generator 74 outputs the bias value to the adder 76.
It should be noted that until the push button switch 84 is pressed, that is, when the operation of the pressure regulating valve 34 is not checked, the output generator 86 is in an OFF state, so the bias generator 74 outputs a 0 value. The bias value is not added to the pressure setting value.

When the bias value is added to the flow control valve pressure setting value by the adding unit 76, the difference between the flow control valve pressure set value output from the subtraction unit 70 and the flow control valve pressure measurement value also changes, and the pressure is changed accordingly. Since the pressure adjustment opening degree output from the valve adjustment control unit 72 also changes, the opening degree of the pressure adjustment valve 34 changes.
As described above, when the operation of the pressure regulating valve 34 is checked, the bias value is added to the flow regulating valve pressure setting value. Therefore, even if the load of the gas turbine 10 is constant, the flow regulating valve pressure setting value. Changes, and the opening degree of the pressure adjustment valve 34 changes, so that the operation of the pressure adjustment valve 34 can be confirmed.

  The bias value increases or decreases with time as shown in the example of FIG. Thereby, since the opening degree of the pressure regulating valve 34 changes in the opening direction and the closing direction, the operation of the pressure regulating valve 34 can be confirmed more reliably. Further, since the bias value changes from 0 and returns to 0 again, even if the opening degree of the pressure adjustment valve 34 is changed in order to check the operation, the opening degree is restored again. The fluctuation of the output of the generator 30 accompanying the operation check can be reduced.

On the other hand, the flow control valve opening calculation unit 52 is based on the CSO selected by the low value selection unit 62 among the CSOs calculated by the load control calculation unit 56, the rotation speed control calculation unit 58, and the temperature control calculation unit 60. To calculate the fuel flow rate. The flow adjustment valve opening calculation unit 52 calculates the Cv value based on the fuel flow rate, the fuel temperature, and the flow adjustment valve pressure by the Cv value calculation unit 66, and the flow rate adjustment valve 36 based on the calculated Cv value. Is output to the flow rate adjustment valve 36. The operation of the flow control valve opening calculation unit 52 according to the first embodiment is the same regardless of whether or not the operation of the pressure adjustment valve 34 is confirmed.
In other words, when the operation of the pressure adjustment valve 34 is confirmed, the opening of the pressure adjustment valve 34 changes as the bias value is added to the flow adjustment valve pressure setting value, so that the pressure adjustment valve 34 is supplied to the combustor 16. The amount of fuel changes and the load also changes. For this reason, in order to make the load constant, the CSO output from the load control calculation unit 56, the rotation speed control calculation unit 58, and the temperature control calculation unit 60 included in the flow adjustment valve opening calculation unit 52 changes. And the opening degree of the flow regulating valve 36 is controlled according to the change of CSO.

As described above, the control device 50 of the gas turbine 10 according to the first embodiment includes the subtraction unit 70 that calculates the difference between the flow control valve pressure measurement value and the flow control valve pressure setting value, and the subtraction unit 70. Based on the calculated difference, the pressure adjustment control unit 72 that controls the opening degree of the pressure adjustment valve 34 and the pressure set value input to the subtraction unit 70 when the operation of the pressure adjustment valve 34 is confirmed. And a bias generator 74 for generating a bias value for addition.
Therefore, the control device 50 according to the first embodiment enables the operation confirmation of the pressure adjustment valve 34 to be confirmed with a simple configuration when the load is controlled at a constant load.

[Second Embodiment]
Hereinafter, a second embodiment of the present invention will be described.

  The configuration of the gas turbine 10 according to the second embodiment is the same as the configuration of the gas turbine 10 according to the first embodiment shown in FIG.

Here, in the control device 50 according to the first embodiment described above, the operation of the flow adjustment valve opening calculation unit 52 is the same regardless of whether or not the operation of the pressure adjustment valve 34 is confirmed. For the fluctuation of the output of the generator 30 accompanying the change of the flow control valve pressure setting value for confirmation, it depends on the load control.
In addition, when the control device 50 according to the first embodiment described above confirms the operation of the pressure adjustment valve 34, the opening degree of the pressure adjustment valve 34 is changed based on the flow adjustment valve pressure setting value to which the bias value is added. Therefore, the opening degree of the pressure regulating valve 34 is not changed directly. That is, the control device 50 can use the flow control valve pressure set value to which the bias value is added for controlling the opening degree of the flow rate adjustment valve 36.

  Therefore, the flow control valve opening calculation unit 52 according to the second embodiment and the third embodiment to be described later, when checking the operation of the pressure adjustment valve 34, sets the flow control valve pressure setting value to which the bias value is added. Based on this, the opening degree of the flow regulating valve 36 is controlled. For this reason, since the opening degree of the flow regulating valve 36 is corrected in advance based on the change in the flow control valve pressure setting value, the gas turbine 10 according to the second embodiment and the third embodiment to be described later is The followability of the output of the generator 30 with respect to the load when the operation of the adjustment valve 34 is confirmed can be improved.

  FIG. 5 shows a configuration of the control device 50 according to the second embodiment. In FIG. 5, the same components as those in FIG. 2 are denoted by the same reference numerals as those in FIG.

As shown in FIG. 5, the control device 50 according to the second embodiment includes a correction unit 90 that outputs a correction coefficient according to the flow control valve pressure setting value to which the bias value is added.
When the operation of the pressure adjustment valve 34 is confirmed (when the pushbutton switch 84 is pressed), the correction unit 90, for example, data (correction coefficient map) that indicates in advance the relationship between the flow control valve pressure setting value and the correction coefficient. ) To output a correction coefficient corresponding to the flow control valve pressure set value.

Further, the flow control valve opening calculation unit 52 according to the second embodiment includes a multiplication unit 92 between the Cv value calculation unit 66 and the valve opening calculation unit 68.
The multiplication unit 92 multiplies the correction coefficient output from the correction unit 90 by the Cv value output from the Cv value calculation unit 66 and outputs the result to the valve opening calculation unit 68.

As a result, when the operation of the pressure regulating valve 34 is confirmed, the flow adjustment valve opening calculation unit 52 according to the second embodiment multiplies a correction coefficient corresponding to the flow adjustment valve pressure setting value to which the bias value is added. Based on the obtained Cv value, the opening degree of the flow regulating valve 36 is calculated.
Note that the smaller the flow control valve pressure set value, the larger the correction coefficient. That is, when the sign of the bias value is negative, the opening degree of the flow rate adjusting valve 36 changes in the direction of opening. This is because the output of the gas turbine 10 is made constant by increasing the flow rate of the fuel as the fuel pressure decreases. On the other hand, when the sign of the bias value is positive, the opening degree of the flow rate adjustment valve 36 changes in the closing direction. This is because the output of the gas turbine 10 is made constant by decreasing the flow rate of the fuel in accordance with the increase in the fuel pressure.

  As described above, the control device 50 according to the second embodiment can improve the followability of the output of the generator 30 with respect to the load when the operation of the pressure regulating valve 34 is confirmed with a simple configuration.

  In addition, although the control apparatus 50 which concerns on this 2nd Embodiment demonstrated the form which multiplies the correction coefficient by the Cv value output from the Cv value calculating part 66, it is not restricted to this, A correction coefficient is a valve opening degree calculating part. The valve opening degree output from 68 may be multiplied.

[Third Embodiment]
Hereinafter, a third embodiment of the present invention will be described.

  The configuration of the gas turbine 10 according to the third embodiment is the same as the configuration of the gas turbine 10 according to the first embodiment shown in FIG.

FIG. 6 shows a configuration of the control device 50 according to the third embodiment. In FIG. 6, the same components as those in FIG. 2 are denoted by the same reference numerals as those in FIG.
The control device 50 according to the third embodiment calculates the Cv value of the flow rate adjustment valve 36 based on the flow control valve pressure setting value to which the bias value is added.
That is, the flow control valve pressure setting value added with the bias value is used as the flow control valve pressure used by the Cv value calculation unit 66 to calculate the Cv value.
Thereby, in the calculation of the Cv value by the Cv value calculation unit 66, the change in the flow control valve pressure set value due to the addition of the bias value is reflected, and the opening degree of the flow rate adjustment valve 36 is corrected in advance. Is done.

  Accordingly, the control device 50 according to the third embodiment does not need to add a new configuration unlike the control device 50 according to the second embodiment, and thus the operation of the pressure adjustment valve 34 can be confirmed with a simpler configuration. The followability of the output of the generator 30 with respect to the load in the case of performing can be improved.

  As mentioned above, although this invention was demonstrated using said each embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. Various changes or improvements can be added to the above-described embodiments without departing from the gist of the invention, and embodiments to which the changes or improvements are added are also included in the technical scope of the present invention.

  For example, in each of the above embodiments, the Cv value calculation unit 66 calculates the Cv value based on the value of the fuel flow rate calculated based on the CSO, the fuel temperature, and the differential pressure measured by the pressure measurement unit 38. However, the present invention is not limited to this, and the Cv value calculation unit 66 calculates the Cv value based on the fuel flow rate value, the fuel temperature, and the preset differential pressure. Also good.

  Further, in each of the above-described embodiments, the mode in which the valve opening degree of the pressure regulating valves 34P and 34M is controlled by the differential pressure adjustment control has been described. However, the present invention is not limited to this and is shown in FIG. As shown in FIG. 3, the pressure regulating valve 34 is provided in common with the flow regulating valves 36P and 36M, and the pressure upstream of the flow regulating valves 36P and 36M measured by the pressure measuring unit 96 (hereinafter referred to as “flow regulating pre-pressure”). The total pressure control for controlling the valve opening degree of the pressure regulating valve 34 may be performed based on the above. That is, in the case of this form, the pre-flow-control valve pressure becomes the flow-control valve pressure measurement value input to the subtraction unit 70.

DESCRIPTION OF SYMBOLS 10 Gas turbine 12 Turbine 16 Combustor 34 Pressure regulating valve 36 Flow regulating valve 50 Control apparatus 70 Subtraction part 72 Pressure regulation control part 74 Bias generation part

Claims (4)

By a combustor that burns fuel to generate combustion gas, a pressure adjustment valve that adjusts the pressure of fuel supplied to the combustor, a flow rate adjustment valve that adjusts the flow rate of fuel supplied to the combustor, and the combustor A control device for a gas turbine including a turbine driven by generated combustion gas,
Calculating means for calculating a difference between a measured value of the pressure of the fuel flowing through the flow rate adjusting valve and a preset value of the pressure;
Pressure regulating control means for controlling the opening of the pressure regulating valve based on the difference calculated by the calculating means;
A bias generating means for generating a bias value to be added to the set value of the pressure input to the calculating means when performing an operation check of the pressure regulating valve;
With
A Cv value of the flow rate adjusting valve is calculated, an opening degree of the flow rate adjusting valve is calculated based on the Cv value, and a correction coefficient corresponding to a set value of the pressure to which the bias value is added is calculated as the flow rate. A control device for a gas turbine that multiplies the opening of the regulating valve or the Cv value . The bias value returns to 0 after changed from 0 to a first predetermined value, the control of the subsequent claim 1 Symbol placement of the gas turbine returns to 0 after changed until said first predetermined value and a second predetermined value different code apparatus. A combustor that burns fuel to produce combustion gas;
A pressure regulating valve for regulating the pressure of the fuel supplied to the combustor;
A flow rate adjusting valve for adjusting a flow rate of fuel supplied to the combustor;
A turbine driven by combustion gas generated by the combustor;
A control device according to claim 1 or 2 , and
A gas turbine comprising: By a combustor that burns fuel to generate combustion gas, a pressure adjustment valve that adjusts the pressure of fuel supplied to the combustor, a flow rate adjustment valve that adjusts the flow rate of fuel supplied to the combustor, and the combustor A method for controlling a gas turbine including a turbine driven by generated combustion gas,
A first step of generating a bias value when confirming the operation of the pressure regulating valve;
A second step of calculating a difference between a preset value of the pressure to which the bias value is added and a measured value of the pressure of the fuel flowing through the flow rate adjustment valve;
A third step of controlling the opening of the pressure regulating valve based on the calculated difference;
Only including,
A Cv value of the flow rate adjusting valve is calculated, an opening degree of the flow rate adjusting valve is calculated based on the Cv value, and a correction coefficient corresponding to a set value of the pressure to which the bias value is added is calculated as the flow rate. A method for controlling a gas turbine that multiplies an opening of a regulating valve or the Cv value .

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