JP2016050571A - Control device, system, and control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control device and the like capable of properly implementing temperature adjustment control to load fluctuation while improving performance of a system such as a gas turbine in a partial load operation.SOLUTION: In a control device of a gas turbine including a compressor, a combustor, and a turbine, load control for changing an operation control point to control an operation of the gas turbine is executed according to load of the gas turbine, and an operation of the gas turbine is controlled on the basis of a rated temperature adjustment line T1 for adjusting and controlling an exhaust gas temperature under the prescribed load to a rated exhaust gas temperature so that performance of the gas turbine becomes rated performance, a prior setting line T2 to set the exhaust gas temperature under the prescribed load to a prior exhaust gas temperature to be lowered prior to the rated exhaust gas temperature, and a limit temperature adjustment line T3 for adjusting and controlling the exhaust gas temperature under the prescribed load so that it is not over the limited exhaust gas temperature higher than the rated exhaust gas temperature.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a control device, system, and control method for a system such as a gas turbine that performs temperature control.

  A general gas turbine includes a compressor, a combustor, and a turbine. The air taken in from the air intake port is compressed by the compressor to become high-temperature and high-pressure compressed air. In the combustor, the fuel is supplied to the compressed air and burned, so that the high-temperature and high-pressure is burned. The combustion gas (working fluid) is obtained, the turbine is driven by the combustion gas, and the generator connected to the turbine is driven. The combustion gas that has driven the turbine is discharged as exhaust gas from the exhaust side of the turbine.

  Such a control device for controlling the gas turbine adjusts the amount of air taken into the compressor, the supply amount of fuel, and the like so that the turbine inlet temperature of the turbine into which the combustion gas flows does not exceed a preset upper limit temperature. In addition, temperature control is performed to control the operation of the gas turbine. This is because the performance (work efficiency) of the gas turbine increases as the turbine inlet temperature increases. On the other hand, if the turbine inlet temperature is too high, it is difficult for high-temperature components around the turbine inlet to withstand the heat load. Because it becomes. Specifically, in the temperature control, the temperature of the exhaust gas from the turbine is a temperature that is the upper limit temperature of the exhaust gas temperature defined according to the gas turbine state quantity such as the load (generator output) of the gas turbine and the pressure ratio. The operation of the gas turbine is controlled so that the adjustment line is not exceeded. Here, the temperature control line is defined as a function in which the upper limit temperature of the exhaust gas temperature decreases as the load on the gas turbine increases, while the upper limit temperature of the exhaust gas temperature increases as the load on the gas turbine decreases. Yes.

  Examples of gas turbine control devices that perform temperature control include those described in Patent Documents 1 and 2 below. In the operation control device for a gas turbine disclosed in Patent Document 1, the opening degree of the inlet guide vane provided on the intake side of the compressor is corrected in the opening direction as the load change amount at the time of load increase of the gas turbine is larger. Further, the gas turbine inlet guide vane control device of Patent Document 2 includes an exhaust gas temperature control unit, and the exhaust gas temperature control unit precedes based on an opening schedule of the inlet guide vane (IGV) obtained in advance. When the IGV opening is set and the exhaust gas temperature during operation is likely to exceed the limit value, the preceding IGV opening is automatically feedback corrected to increase the IGV opening.

JP 2008-75578 A JP 2007-40171 A

  By the way, the gas turbine is operated according to the load, and specifically, full load operation and partial load operation are performed. Normally, when full load operation is performed, temperature control is performed so that the turbine inlet temperature reaches near the upper limit temperature in order to exhibit the performance of the gas turbine. In this temperature control, specifically, the operation of the gas turbine is controlled so that the exhaust gas temperature during full load operation is near the temperature control line.

  On the other hand, in the partial load operation, the temperature control is not executed to ensure the responsiveness of the gas turbine output to the load fluctuation. That is, the load of the gas turbine is controlled at an exhaust gas temperature lower than the upper limit temperature of the temperature adjustment line so that the exhaust gas temperature is not limited by the upper limit temperature of the temperature adjustment line.

  In recent years, even in partial load operation, in order to improve the performance of the gas turbine, temperature control may be performed so that the turbine inlet temperature reaches the vicinity of the upper limit temperature. Specifically, in the temperature control, the operation of the gas turbine is controlled so that the exhaust gas temperature during the partial load operation is near the temperature control line.

  However, when temperature control is performed so that the exhaust gas temperature is close to the temperature adjustment line during partial load operation, the exhaust gas temperature may be limited by the temperature adjustment line when the load of the gas turbine fluctuates. . For this reason, it may be difficult for the gas turbine to adjust the gas turbine output according to the load fluctuation.

  In addition, when temperature control is performed so that the exhaust gas temperature is in the vicinity of the temperature control line during partial load operation, the intake amount of air taken in from the air intake may decrease due to disturbance such as load fluctuation. In this case, since the exhaust gas temperature rises, in the temperature control, so-called load fall that reduces the load of the gas turbine occurs. In other words, the upper limit temperature of the exhaust gas temperature becomes higher as the load of the gas turbine becomes smaller in the temperature adjustment line. Therefore, in the temperature control, when the exhaust gas temperature rises, the upper limit temperature of the exhaust gas temperature should be increased. Reduce the load on the gas turbine. At this time, the intake amount of air is adjusted by the opening degree of the inlet guide vane, and the opening degree of the inlet guide vane is set based on the gas turbine output. For this reason, in the temperature control, when the load of the gas turbine decreases and the gas turbine output decreases, the air intake amount is controlled by closing the opening of the inlet guide vanes, and thus the exhaust gas is again discharged. Since the temperature increases, the load of the gas turbine continues to decrease.

  Therefore, the present invention provides a control device, a system, and a control method that can suitably execute temperature control during load fluctuations while improving the performance of a system such as a gas turbine during partial load operation. Let it be an issue.

  The control device of the present invention compresses the sucked air by a compressor to form compressed air, mixes the supplied fuel and the compressed air and burns them, generates a combustion gas, and generates the combustion gas. In a control device for a system that operates a turbine, load control is performed to change an operation control point for controlling operation of the system according to a load of the system, and an exhaust gas temperature at a predetermined load is A rated temperature control line for controlling the temperature to a rated exhaust gas temperature at which the performance of the system becomes the rated performance, and the exhaust gas temperature at a predetermined load is ahead of the rated exhaust gas temperature. The preceding setting line for setting the preceding exhaust gas temperature to be low, and the limit at which the exhaust gas temperature at the predetermined load is higher than the rated exhaust gas temperature Based on the limit temperature control lines for temperature control so as not to exceed the vapor gas temperature, and controlling the operation of the system.

  In the control method of the present invention, the sucked air is compressed by a compressor to be compressed air, and the supplied fuel and the compressed air are mixed and burned to generate a combustion gas, and the generated combustion In a control method of a system for operating a turbine by gas, load control for changing an operation control point for controlling operation of the system according to a load of the system is executed, and exhaust gas at a predetermined load A rated temperature control line for controlling the temperature to a rated exhaust gas temperature at which the performance of the system becomes the rated performance, and the exhaust gas temperature at a predetermined load is earlier than the rated exhaust gas temperature. A preceding setting line for setting the preceding exhaust gas temperature to be lower, and the exhaust gas temperature at a predetermined load is higher than the rated exhaust gas temperature. Based on the limit temperature control lines for temperature control so as not to exceed the limit exhaust gas temperature, and controlling the operation of the system.

  According to this configuration, the operation control point of the system can be changed based on the rated temperature adjustment line, the preceding setting line, and the limit temperature adjustment line. At this time, the higher exhaust gas temperature side can be used as the limit temperature adjustment line, and the lower exhaust gas temperature side can be used as the preceding setting line across the rated temperature adjustment line. For this reason, there is an operation control point on the rated temperature adjustment line, and even if the operation control point is changed due to load fluctuation from this state, the exhaust gas temperature does not fall on the limit temperature adjustment line and the load does not fall. The control point can be changed. In addition, when the load fluctuates, the operation control point can be shifted to the preceding setting line, so that the exhaust gas temperature is less likely to be applied to the limit temperature adjustment line, and the operation control point can be easily changed. . In this way, even when there is an operation control point on the rated temperature adjustment line during partial load operation, the temperature adjustment control can be easily executed against load fluctuations, and on the rated temperature adjustment line. Since partial load operation is possible, the system can be operated with rated performance during partial load operation. The rated performance is the performance at which the work efficiency (operation efficiency) of the gas turbine is optimal when the system such as the gas turbine is at a predetermined load, that is, the performance when the turbine inlet temperature is the upper limit temperature. is there. The system can be applied to a gas engine system and the like in addition to a gas turbine that generates electric power.

  In addition, when the load fluctuates, the operation control point is shifted to the preceding setting line, the operation control point is changed along the preceding setting line, and then the target load that is the target of the load. Then, it is preferable to shift the operation control point to the rated temperature control line.

  According to this configuration, when the operation control point is shifted to the preceding setting line during a load change, the operation control point is changed according to the load change without being limited to the limit temperature adjustment line. It becomes possible. When the operation control point is shifted from the preceding setting line to the rated temperature adjustment line, the limit temperature adjustment line is on the side where the exhaust gas temperature is higher than the rated temperature adjustment line. The operation control point can be shifted to the rated temperature adjustment line without being restricted by the adjustment line.

  Further, after the operation control point is changed so that the exhaust gas temperature becomes lower than the preceding exhaust gas temperature of the preceding setting line at the time of increasing the load at which the load increases, the load becomes the target. When the target load to be reached is reached, it is preferable to shift the operation control point to the rated temperature control line.

  According to this configuration, when the load change amount is large, the decrease in the limit exhaust gas temperature of the limit temperature adjustment line is accelerated as the load is increased. At this time, if the exhaust gas temperature at the operation control point decreases with a delay, the exhaust gas temperature at the operation control point is limited to the limit exhaust gas temperature, which makes it difficult to change the operation control point. For this reason, when the load change amount at the time of increasing the load is large, the operation control point can be changed so as to be lower than the preceding exhaust gas temperature of the preceding setting line. Therefore, the operation control point can be suitably changed without limiting the exhaust gas temperature to the limit temperature adjustment line. In addition, when the variation | change_quantity of a load fluctuation is large, when a gas turbine is applied as a system, for example, it is at the time of the rapid start-up operation of a gas turbine, or the frequency fluctuation of a generator.

  In addition, when performing a load reduction in which the load decreases from a temperature control state in which the exhaust gas temperature becomes the rated exhaust gas temperature of the rated temperature control line, the limit exhaust gas temperature of the limit temperature control line is set. After changing the rated temperature adjustment line so that it becomes the rated exhaust gas temperature, it is preferable to shift the operation control point from the rated temperature adjustment line to the preceding setting line.

  According to this configuration, when the load is lowered from the temperature control state where the exhaust gas temperature becomes the rated exhaust gas temperature, the exhaust gas at the operation control point is changed by changing the limit temperature control line to the rated temperature control line. The temperature can be limited so as not to exceed the rated exhaust gas temperature. For this reason, at the time of load reduction, it can suppress that exhaust gas temperature becomes high exceeding a rated temperature control line. In addition, it is preferable to return the limit temperature control line changed so that it may become a rated temperature control line to the state before a change, after an operation control point transfers to a prior setting line.

  Further, the limit exhaust gas temperature of the limit temperature adjustment line is defined as a function of a pressure ratio of the compressor, and the exhaust gas temperature is an exhaust gas measurement temperature measured by an exhaust gas thermometer, and the load When the exhaust gas measurement temperature exceeds the limit exhaust gas temperature of the limit temperature adjustment line and satisfies a preset setting condition, the exhaust gas measurement temperature is set to the limit temperature. It is preferable to allow the operation control point to change beyond the limit exhaust gas temperature of the adjustment line.

  According to this configuration, when the load is increased, the limit exhaust gas temperature of the limit temperature adjustment line defined by the function of the pressure ratio of the compressor decreases as the load increases. At this time, the exhaust gas measurement temperature at the operation control point is delayed with respect to the limit exhaust gas temperature. In this case, the exhaust gas measurement temperature at the operation control point is limited to the limit exhaust gas temperature, and it becomes difficult to change the operation control point. For this reason, it is possible to suppress the change in the operation control point from being limited by the limit exhaust gas temperature by allowing the operation control point to change beyond the limit exhaust gas temperature under a predetermined setting condition. The operation control point can be suitably changed.

  Further, the limit exhaust gas temperature of the limit temperature adjustment line is defined as a function of the pressure ratio of the compressor, and the exhaust gas temperature is an exhaust gas measurement temperature measured by the exhaust gas thermometer, When the exhaust gas measurement temperature exceeds the limit exhaust gas temperature of the limit temperature adjustment line and satisfies a preset setting condition when the load is increased, the limit of the limit temperature adjustment line is satisfied. It is preferable that the exhaust gas temperature be higher than the exhaust gas measurement temperature.

  According to this configuration, when the load is increased, the limit exhaust gas temperature of the limit temperature adjustment line defined by the function of the pressure ratio of the compressor decreases as the load increases. At this time, the exhaust gas measurement temperature at the operation control point is delayed with respect to the limit exhaust gas temperature. In this case, the exhaust gas measurement temperature at the operation control point is limited to the limit exhaust gas temperature, and it becomes difficult to change the operation control point. For this reason, by making the limit exhaust gas temperature larger than the exhaust gas measurement temperature under a predetermined setting condition, it is possible to suppress the change in the operation control point due to the limit exhaust gas temperature. It can be suitably changed.

  In addition, the compressor has an inlet guide vane that can adjust an opening degree provided on the intake side, and the setting condition is that the exhaust gas temperature follows the rated exhaust gas temperature of the rated temperature adjustment line. First, the opening degree of the inlet guide blade is such that the operation control point shifts to the preceding setting line and the exhaust gas temperature is lower than the preceding exhaust gas temperature of the preceding setting line. It is preferable that at least one condition is included among the second condition for opening the pressure and the third condition for increasing the pressure ratio of the compressor.

  According to this configuration, the setting condition can be set on the premise that the exhaust gas temperature is lowered. That is, since the first condition is that the exhaust gas temperature becomes the preceding exhaust gas temperature, the exhaust gas temperature can be reduced. Further, since the second condition is that the intake air is increased by opening the opening of the inlet guide vanes, the exhaust gas temperature can be reduced. Furthermore, since the third condition is that the pressure ratio of the compressor is increased to increase the amount of air taken in, the exhaust gas temperature can be reduced.

  Further, the compressor preferably has an inlet guide vane provided on the intake side capable of adjusting an opening degree, and the operation control point is preferably changed by adjusting an opening degree of the inlet guide vane.

  According to this configuration, the operation control point of the system can be changed by adjusting the opening of the inlet guide vane. In other words, when the load is increased, by adjusting the opening degree of the inlet guide vanes in the direction to open, the intake air amount taken in by the compressor is increased, and the exhaust gas temperature is decreased by the increase in the intake air amount. be able to. In addition, when the load is reduced, the intake guide blade opening is adjusted in the closing direction to reduce the amount of intake air taken in by the compressor, and to increase the exhaust gas temperature by reducing the amount of air intake. be able to.

  The system of the present invention includes a compressor that compresses sucked air into compressed air, a combustor that generates combustion gas by supplying fuel to the compressed air and burning the compressed air, and the generated A turbine that is operated by combustion gas and the above-described control device are provided.

  According to this structure, the performance at the time of partial load driving | operation can be made high, and the temperature control at the time of load fluctuation can be performed suitably.

FIG. 1 is a schematic diagram illustrating a gas turbine according to a first embodiment. FIG. 2 is a graph showing a temperature adjustment line in which the exhaust gas temperature changes according to the load of the gas turbine. FIG. 3 is an explanatory diagram regarding an example of the temperature control of the first embodiment. FIG. 4 is an explanatory diagram regarding an example of the temperature control of the second embodiment. FIG. 5 is an explanatory diagram relating to an example of temperature control according to the third embodiment. FIG. 6 is an explanatory diagram relating to an example of temperature control according to the fourth embodiment. FIG. 7 is an explanatory diagram relating to an example of temperature control in the fifth embodiment.

  Embodiments according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same. Furthermore, the constituent elements described below can be combined as appropriate, and when there are a plurality of embodiments, the embodiments can be combined.

  FIG. 1 is a schematic diagram illustrating a gas turbine according to a first embodiment. FIG. 2 is a graph showing a temperature adjustment line in which the exhaust gas temperature changes according to the load of the gas turbine. FIG. 3 is an explanatory diagram regarding the temperature control of the first embodiment.

  As shown in FIG. 1, the gas turbine 1 according to the first embodiment includes a compressor 11, a combustor 12, and a turbine 13. A rotor 18 is disposed through the center of the compressor 11, the combustor 12, and the turbine 13, and the compressor 11 and the turbine 13 are coupled to each other by the rotor 18 so as to be integrally rotatable. The gas turbine 1 is controlled by a control device 14. Moreover, the generator 15 is connected with the gas turbine 1, and electric power generation is possible.

  The compressor 11 compresses the air A taken in from the air intake port into compressed air A1. The compressor 11 is provided with an inlet guide vane (IGV: Inlet Guide Vane) 22 that adjusts the intake amount of the air A taken in from the air intake. The intake air amount of the air A is adjusted by adjusting the opening degree of the inlet guide vane 22. Specifically, the inlet guide vane 22 has a plurality of blade main bodies 22a and an IGV operating portion 22b for changing the blade angles of the plurality of blade main bodies 22a, and the blade angle of the blade main body 22a by the IGV operating portion 22b. Is adjusted, the opening degree of the inlet guide vane 22 is adjusted, and the intake amount of the air A is adjusted. As the opening degree of the inlet guide vane 22 increases, the intake amount of the air A increases and the pressure ratio of the compressor 11 increases. On the other hand, the opening degree of the inlet guide vanes 22 decreases, so that the intake amount of the air A decreases, and the pressure ratio of the compressor 11 decreases.

  The combustor 12 supplies the fuel F to the compressed air A1 compressed by the compressor 11, mixes the compressed air A1 and the fuel F, and burns to generate combustion gas. The turbine 13 is rotated by the combustion gas generated by the combustor 12.

  The rotor 18 is rotatably supported at both ends in the axial direction by bearings (not shown), and is rotatably provided about the axis. The drive shaft of the generator 15 is connected to the end of the rotor 18 on the compressor 11 side. The generator 15 is provided coaxially with the turbine 13, and can generate power when the turbine 13 rotates.

  Therefore, the air A taken in from the air intake port of the compressor 11 passes through the inside of the compressor 11 through the inlet guide vanes 22 and is compressed to become high-temperature and high-pressure compressed air A1. The fuel F is supplied from the combustor 12 to the compressed air A1, and the compressed air A1 and the fuel F are mixed and burned, whereby high-temperature and high-pressure combustion gas is generated. The high-temperature and high-pressure combustion gas generated in the combustor 12 passes through the inside of the turbine 13 to actuate (rotate) the turbine 13 to drive and rotate the rotor 18, and is connected to the rotor 18. The generator 15 is driven. Thereby, the generator 15 connected to the rotor 18 generates electric power by being rotationally driven. On the other hand, the combustion gas that has driven the turbine 13 is released into the atmosphere as exhaust gas.

  The operation of such a gas turbine 1 is controlled by the control device 14. Specifically, the control device 14 controls the operation of the gas turbine 1 according to the load of the gas turbine 1 (the output of the generator 15), specifically, the partial load operation of the gas turbine 1, It is under load operation. The full load operation is an operation in which the gas turbine output becomes the rated output. The partial load operation is an operation in which the gas turbine output is smaller than the rated output.

  Further, the control device 14 adjusts the intake amount of the air A taken into the compressor 11 and the fuel supply amount of the fuel F supplied from the combustor 12 during the partial load operation and the full load operation, and the combustion gas. The temperature adjustment control is executed so that the turbine inlet temperature of the turbine 13 into which the gas flows in does not exceed a preset upper limit temperature.

  The control device 14 controls the IGV operating portion 22b that operates the inlet guide vane 22 in order to adjust the amount of air (intake amount) taken into the compressor 11. The control device 14 controls the IGV operating unit 22 b to change the opening degree of the inlet guide vane 22 and adjust the intake amount of the air A taken into the compressor 11. Specifically, the control device 14 performs control so that the opening degree of the inlet guide vane 22 becomes the rated opening degree during full load operation. The rated opening is the opening when the gas turbine output becomes the rated output. Moreover, the control apparatus 14 can be controlled so that the opening degree of the inlet guide vane 22 becomes a super-open state larger than the rated opening degree. Here, the opening degree of the inlet guide vane 22 is defined by a function of the gas turbine output. For this reason, the control apparatus 14 sets the opening degree of the inlet guide blade 22 to the opening degree according to the gas turbine output.

  Further, the control device 14 controls a fuel adjustment valve 35 provided in a fuel supply line 34 for supplying the fuel F to the combustor 12 in order to adjust the supply amount of the fuel F. The control device 14 controls the fuel adjustment valve 35 to adjust the supply amount of the fuel F supplied (injected) to the compressed air A1.

  Further, a pressure gauge 51 and an exhaust gas thermometer 52 are connected to the control device 14. The pressure gauge 51 is provided in a line through which the compressed air A1 flows from the compressor 11 toward the combustor 12, specifically, in the vehicle interior of the combustor 12, and the pressure of the compressed air A1 (vehicle interior pressure) is measured. measure. The exhaust gas thermometer 52 includes a blade path thermometer 52a provided on the upstream side in the exhaust gas flow direction and an exhaust section thermometer 52b provided on the downstream side of the blade path thermometer 52a. The exhaust gas thermometer 52 measures the temperature of the exhaust gas discharged from the turbine 13.

  Then, the control device 14 controls the operation of the gas turbine 1 by controlling the inlet guide vane 22 and the fuel adjustment valve 35 based on the measurement results of the measuring instruments 51 and 52 and the like. Execute load control to be changed. Further, the control device 14 controls the inlet guide vane 22 and the fuel injection valve 35 and the like based on the measurement results of the measuring instruments 51 and 52 and changes the operation control point along the temperature control line described below. Execute temperature control.

  Here, in the temperature control, the rated temperature adjustment line T1, the preceding setting line T2, and the limit temperature adjustment line T3 shown in FIG. 2 are used. In the graph of FIG. 2, the horizontal axis represents the gas turbine load, and the vertical axis represents the exhaust gas temperature. The rated temperature adjustment line T1, the preceding setting line T2, and the limit temperature adjustment line T3 are functions defined by the exhaust gas temperature and the pressure ratio of the compressor 11. For this reason, the control device 14 derives the pressure ratio of the compressor 11 based on the measurement result of the pressure gauge 51, and from the derived pressure ratio, the rated temperature adjustment line T1, the preceding setting line T2, and the limit temperature adjustment line. Based on T3, an exhaust gas temperature (a rated exhaust gas temperature, a preceding exhaust gas temperature, and a limit exhaust gas temperature described later) is derived.

  As shown in FIG. 2, the rated temperature adjustment line T1, the preceding setting line T2, and the limit temperature adjustment line T3 are lines in which the exhaust gas temperature decreases as the gas turbine load (more specifically, the pressure ratio) increases. It has become. Hereinafter, the rated temperature adjustment line T1, the preceding setting line T2, and the limit temperature adjustment line T3 will be specifically described.

  The rated temperature adjustment line T1 is set to a rated exhaust gas temperature corresponding to the gas turbine load so that the performance of the gas turbine 1 at a predetermined gas turbine load becomes the rated performance. At this time, the rated exhaust gas temperature of the rated temperature adjustment line T1 is an exhaust gas temperature at which the turbine inlet temperature does not exceed a preset upper limit temperature. The rated performance is a performance that optimizes the work efficiency of the gas turbine 1 when a predetermined load is applied from the generator 15 to the gas turbine 1. The rated temperature adjustment line T1 indicates that the exhaust gas temperature (exhaust gas measurement temperature) measured by the exhaust gas thermometer 52 when the partial load operation or the full load operation is set is the rated exhaust gas temperature of the rated temperature adjustment line T1. It is a line that becomes. That is, the control device 14 performs feedback control (for example, PI control) of the operation of the gas turbine 1 so that the exhaust gas measurement temperature becomes the rated exhaust gas temperature.

  Here, FIG. 2 shows an IGV rated angle line L1 at which the inlet guide vane 22 has a rated opening. For this reason, the gas turbine load at the intersection where the rated temperature adjustment line T1 and the IGV rated angle line L1 intersect is the intersection (rated point P) that is the full load of the gas turbine 1, and the gas turbine at the rated point P The gas turbine output corresponding to the load is the rated output of the gas turbine 1.

  The preceding setting line T2 is a line for setting the exhaust gas temperature at a predetermined gas turbine load to a preceding exhaust gas temperature that is lower than the rated exhaust gas temperature. For this reason, the preceding exhaust gas temperature in a predetermined gas turbine load is lower than the rated exhaust gas temperature. Specifically, the preceding setting line T2 is a line for increasing the opening degree of the inlet guide vane 22 prior to the rated temperature adjustment line T1. For this reason, when the control device 14 changes the operation control point of the gas turbine 1 along the preceding setting line T2, the opening of the inlet guide vane 22 set based on the rated temperature adjustment line T1 is larger. The inlet guide vane 22 is controlled so as to be at a degree.

  The limit temperature adjustment line T3 is a line in which the exhaust gas temperature at a predetermined gas turbine load does not exceed the limit exhaust gas temperature. In other words, the limit exhaust gas temperature at a given gas turbine load is higher than the rated exhaust gas temperature, and is set to an allowable exhaust gas temperature even when the turbine inlet temperature exceeds the upper limit temperature (overshoot). Has been. For this reason, the control device 14 controls the operation of the gas turbine 1 so that the exhaust gas temperature (exhaust gas measurement temperature) measured by the exhaust gas thermometer 52 does not exceed the limit exhaust gas temperature. The limit temperature adjustment line T3 is a line whose limit exhaust gas temperature coincides with the rated exhaust gas temperature of the rated temperature adjustment line T1 during full load operation.

  FIG. 2 also shows an exhaust gas temperature limit line L2 that serves as a limit value for the exhaust gas temperature. The exhaust gas temperature limit line L2 is a temperature at which a member disposed on the exhaust side of the turbine 13 can withstand a heat load. The control device 14 controls the operation of the gas turbine 1 so as not to reach the exhaust gas temperature limit line L2.

  Next, an example of temperature control will be described with reference to FIG. The temperature control shown in FIG. 3 is temperature control at the time of load increase in which the gas turbine load increases. Specifically, in FIG. 3, the load control is performed so that the operation control point of the gas turbine 1 changes along the preceding setting line T2. In FIG. 3, after temperature control is performed so as to be on the rated temperature adjustment line T1 when the partial load operation is set, the temperature control is performed so that it is on the rated temperature adjustment line T1 when the full load operation is set. The case where it will be described.

  Here, the operation control point of the gas turbine 1 varies depending on the opening degree of the inlet guide vane 22, and the opening degree of the inlet guide vane 22 is set according to the gas turbine output. The gas turbine output varies depending on the amount of fuel F supplied. For this reason, the control device 14 adjusts the supply amount of the fuel F of the fuel adjustment valve 35 in accordance with the load fluctuation, changes the gas turbine output, and opens the inlet guide vane 22 according to the changed gas turbine output. By changing the degree, the intake amount of the air A is adjusted, whereby the operation control point of the gas turbine 1 is changed.

  Specifically, the control device 14 increases the gas turbine output by increasing the valve opening of the fuel adjustment valve 35 and increasing the supply amount of the fuel F at the time of increasing the load, thereby increasing the gas turbine output. Accordingly, the intake amount of the air A is increased by increasing the opening degree of the inlet guide vane 22. In the preceding setting line T2, when the intake amount of the air A increases, the pressure ratio of the compressor 11 increases, and therefore the preceding exhaust gas temperature decreases. For this reason, when the control device 14 increases the gas turbine output, the exhaust gas temperature (exhaust gas measurement temperature) that is lower than the preceding exhaust gas temperature of the preceding setting line T2 approaches the preceding exhaust gas temperature.

  Thereafter, when the measured exhaust gas temperature becomes the preceding exhaust gas temperature, the control device 14 controls the temperature so that the operation control point of the gas turbine 1 is along the preceding setting line T2. Then, the control device 14 shifts the operation control point from the preceding setting line T2 to the rated temperature adjustment line T1 when the predetermined target load for performing the partial load operation is reached. Specifically, the control device 14 raises the exhaust gas measurement temperature by controlling the opening degree of the inlet guide blade 22 to be small when a predetermined target load is reached.

  And the control apparatus 14 makes the performance of the gas turbine 1 at the time of partial load operation turn into a rated performance by shifting an operation control point to the rated temperature control line T1. At this time, the control device 14 is not limited to the limit temperature adjustment line T3 because the limit exhaust gas temperature of the limit temperature adjustment line T3 is higher than the rated exhaust gas temperature of the rated temperature adjustment line T1. The operation control point can be shifted to the rated temperature adjustment line T1. For this reason, the control device 14 can control the operation of the gas turbine 1 in an operation state in which the work efficiency of the gas turbine during the partial load operation is optimal.

  Subsequently, in the partial load operation, the controller 14 increases the load from the state where the operation control point becomes the rated temperature adjustment line T1 to perform full load operation, first, the operation control point is set to the preceding setting line T2. Transition. Specifically, the control device 14 reduces the exhaust gas measurement temperature by controlling the opening degree of the inlet guide vanes 22 to be large.

  When the operation control point is shifted to the preceding setting line T2, the control device 14 controls the operation of the gas turbine 1 to increase the gas turbine output. Thereafter, when the opening degree of the inlet guide vane 22 reaches the rated opening degree, the control device 14 shifts the operation control point from the preceding setting line T2 to the rated temperature adjustment line T1. Specifically, when the inlet guide vane 22 reaches the rated opening on the preceding setting line T2, the control device 14 increases the valve opening of the fuel adjustment valve 35 and increases the supply amount of the fuel F, so that the gas Increase turbine output and raise exhaust gas measurement temperature.

  Then, the control device 14 shifts the operation control point to the rated temperature adjustment line T1, so that the performance of the gas turbine during full load operation becomes the rated performance, and the gas turbine output becomes the rated output. For this reason, the control device 14 can control the operation of the gas turbine 1 in an operation state in which the work efficiency of the gas turbine 1 at the time of full load operation is optimal.

  The controller 14 reduces the load by shifting the operation control point of the gas turbine 1 to the preceding setting line T2 at the time of lowering the load as well as at the time of increasing the load. Transition from the line T2 to the rated temperature control line T1.

  As described above, according to the first embodiment, the operation control point of the gas turbine 1 can be changed based on the rated temperature adjustment line T1, the preceding setting line T2, and the limit temperature adjustment line T3. At this time, across the rated temperature adjustment line T1, the higher exhaust gas temperature side can be the limit temperature adjustment line T3, and the lower exhaust gas temperature side can be the preceding setting line T2. For this reason, there is an operation control point on the rated temperature adjustment line T1, and even if the operation control point is changed due to load fluctuation from this state, the exhaust gas temperature is applied to the limit temperature adjustment line T3 and the load falls. The operation control point can be changed. In addition, when the load fluctuates, the operation control point can be shifted to the preceding setting line T2, and the exhaust gas temperature is less likely to be applied to the limit temperature adjustment line T3. Therefore, the operation control point can be easily changed. Can do. As described above, during partial load operation, even when there is an operation control point on the rated temperature adjustment line T1, the temperature adjustment control can be easily performed with respect to the load fluctuation, and the rated temperature adjustment Since the partial load operation can be performed on the line T1, the gas turbine 1 can be operated with the rated performance during the partial load operation. In the first embodiment, the system is applied to the gas turbine 1 that generates power, but may be applied to a gas engine system or the like.

  Next, the control device 14 according to the second embodiment will be described with reference to FIG. FIG. 4 is an explanatory diagram regarding an example of the temperature control of the second embodiment. In the second embodiment, parts that are different from the first embodiment will be described in order to avoid redundant descriptions, and parts that have the same configuration as the first embodiment will be described with the same reference numerals. In the second embodiment, when the load is increased, the operation control point of the gas turbine 1 is changed so as to be lower than the preceding exhaust gas temperature of the preceding setting line T2. The temperature control in the second embodiment is a temperature control in the case where the amount of change in load fluctuation is larger than that in the first embodiment. In addition, when the variation | change_quantity of a load fluctuation is large, it is at the time of the rapid start-up operation of a gas turbine, or the frequency fluctuation of a generator, for example.

  As shown in FIG. 4, in the control device 14 of the second embodiment, as in the first embodiment, the temperature adjustment control is executed using the rated temperature adjustment line T1, the preceding setting line T2, and the limit temperature adjustment line T3. . In FIG. 4, temperature control is performed so as to be on the rated temperature adjustment line T1 at the time of partial load operation, and then temperature control is performed to be on the rated temperature adjustment line T1 at the time of settling of full load operation. The case will be described.

  The control device 14 increases the gas turbine output by increasing the valve opening of the fuel adjustment valve 35 and increasing the supply amount of the fuel F at the time of increasing the load, and the inlet guide according to the increased gas turbine output. Increasing the opening of the blades 22 increases the intake amount of the air A. At this time, the control device 14 uses an opening degree of the inlet guide vane 22 based on the gas turbine output by using a function that makes the opening degree larger than the opening degree of the inlet guide vane 22 set by the preceding setting line T2. Set. For this reason, the control device 14 has an opening larger than the opening of the inlet guide vane 22 in the preceding setting line T2, so that the intake amount of the air A taken into the compressor 11 is larger than that in the preceding setting line T2. Become. Thereby, since the control apparatus 14 can increase the intake amount of the air A to be taken in, the exhaust gas measurement temperature can be quickly reduced. Then, the control device 14 displaces the operation control point of the gas turbine 1 along the preceding setting line T2 in a state where the exhaust gas measurement temperature is lower than the preceding exhaust gas temperature of the preceding setting line T2. At this time, the control device 14 controls the opening degree of the inlet guide blade 22 so that a super-open state in which the opening degree of the inlet guide blade 22 exceeds the rated opening degree is possible.

  Thereafter, the control device 14 shifts the operation control point of the gas turbine from the state lower than the preceding exhaust gas temperature to the rated temperature adjustment line T1 when the predetermined target load for performing the partial load operation is reached. Specifically, the control device 14 raises the exhaust gas measurement temperature by controlling the opening degree of the inlet guide blade 22 to be small when a predetermined target load is reached. And the control apparatus 14 makes the performance of the gas turbine 1 at the time of partial load operation turn into a rated performance by shifting an operation control point to the rated temperature control line T1.

  Subsequently, in the partial load operation, the controller 14 increases the load from the state where the operation control point becomes the rated temperature adjustment line T1 and sets the operation control point to the preceding setting line T2. Transition to a state where the temperature is lower than the exhaust gas temperature. Specifically, the control device 14 controls the opening degree of the inlet guide vanes 22 to be larger than the opening degree on the preceding setting line T2, thereby increasing the intake amount of the air A to be taken in and setting the measured exhaust gas temperature. Decrease quickly.

  When the control device 14 shifts the operation control point to a state where the operation control point becomes lower than the preceding exhaust gas temperature of the preceding setting line T2, the control device 14 controls the operation of the gas turbine 1 to increase the gas turbine output. Thereafter, when the opening degree of the inlet guide vane 22 reaches the rated opening degree, the control device 14 controls the opening degree of the inlet guide vane 22 so as to be in a super-open state exceeding the rated opening degree. Increase the gas turbine output until

  Then, the control device 14 shifts the operation control point to the rated temperature adjustment line T1, so that the performance of the gas turbine during full load operation becomes the rated performance, and the gas turbine output becomes the rated output. For this reason, the control device 14 can control the operation of the gas turbine 1 in an operation state in which the work efficiency of the gas turbine 1 at the time of full load operation is optimal.

  As described above, according to the second embodiment, when the load change amount is large, the limit exhaust gas temperature of the limit temperature adjustment line T3 rapidly decreases as the load increases. At this time, even if the operation control point is displaced due to a load increase, if the exhaust gas measurement temperature decreases with a delay, the operation control point is changed by limiting the exhaust gas measurement temperature to the limit exhaust gas temperature. It becomes difficult. For this reason, when the load change amount at the time of increasing the load is large, the opening degree of the inlet guide vane 22 is set to the preceding setting line by changing the operation control point so as to be lower than the preceding exhaust gas temperature of the preceding setting line T2. It is possible to increase the intake amount of the air A to be taken in by making it larger than T2. As a result, the exhaust gas measurement temperature can be lowered quickly, so that the operation control point can be suitably changed without the exhaust gas measurement temperature being limited to the limit temperature adjustment line T3.

  Next, the control device 14 according to the third embodiment will be described with reference to FIG. FIG. 5 is an explanatory diagram relating to an example of temperature control according to the third embodiment. In Example 3, parts different from Examples 1 and 2 will be described in order to avoid redundant descriptions, and parts having the same configurations as those in Examples 1 and 2 will be described with the same reference numerals. In Example 3, the limit temperature adjustment line T3 is aligned with the rated temperature adjustment line T2 at the time of load reduction.

  As shown in FIG. 5, when the operation control point of the gas turbine 1 is on the rated point (rated temperature adjustment line T2 at the time of full load operation), the controller 14 controls the limit temperature adjustment line T3 at the time of load reduction. The limit exhaust gas temperature is changed to the rated exhaust gas temperature of the rated temperature adjustment line T2. Specifically, the opening degree of the inlet guide blade 22 at the limit temperature adjustment line T3 is smaller than the opening degree of the inlet guide blade 22 at the rated temperature adjustment line T2. For this reason, the control apparatus 14 changes the opening degree of the inlet guide blade 22 in the limit temperature control line T3 so that it may become the opening degree of the inlet guide blade 22 in the rated temperature control line T2. In this state, the control device 14 shifts the operation control point to the preceding setting line T2 at the time of load reduction.

  Then, the control device 14 shifts the operation control point to the preceding setting line T2, and then returns the limit temperature adjustment line T3 to the original state. That is, after the control device 14 shifts the operation control point to the preceding setting line T2, the opening degree of the inlet guide blade 22 at the limit temperature adjustment line T3 is greater than the opening degree of the inlet guide blade 22 at the rated temperature adjustment line T2. Is also changed to a small opening.

  As described above, according to the third embodiment, when the load is lowered from the state where the exhaust gas measurement temperature becomes the rated exhaust gas temperature, the limit temperature adjustment line T3 is changed to become the rated temperature adjustment line T2, The operation of the gas turbine 1 can be controlled so that the measured exhaust gas temperature does not exceed the rated exhaust gas temperature. For this reason, the control device 14 can suppress the exhaust gas measurement temperature from exceeding the rated exhaust gas temperature of the rated temperature adjustment line T2 when the load is reduced.

  In the third embodiment, the load reduction from the rated point has been described. However, the present invention is not limited to this configuration, and the load may be reduced from a state where the operation control point is on the rated temperature adjustment line T2 during partial load operation. The same control as in the third embodiment may be executed.

  Next, the control device 14 according to the fourth embodiment will be described with reference to FIG. FIG. 6 is an explanatory diagram relating to an example of temperature control according to the fourth embodiment. In the fourth embodiment, parts that are different from the first to third embodiments will be described in order to avoid redundant descriptions, and parts that have the same configuration as the first to third embodiments will be described with the same reference numerals. In the fourth embodiment, the operation control point of the gas turbine 1 is allowed to change beyond the limit temperature adjustment line T3 when a preset setting condition is satisfied at the time of increasing the load.

  As shown in FIG. 6, when the operation control point of the gas turbine 1 is on the rated temperature adjustment line T2, when the controller 14 increases the load, the limit exhaust gas temperature on the limit temperature adjustment line T3 is increased. Decreases with it. On the other hand, the exhaust gas measurement temperature of the gas turbine 1 whose operation control point changes as the load increases may decrease with a delay. As described in the first embodiment, the limit exhaust gas temperature of the limit temperature adjustment line T3 is defined as a function of the pressure ratio of the compressor 11. For this reason, when the control device 14 derives the pressure ratio based on the measurement result of the pressure gauge 51, the limit exhaust gas temperature is derived. On the other hand, the control device 14 measures the exhaust gas measurement temperature with the exhaust gas thermometer 52. For this reason, the exhaust gas measurement temperature may be slower in response than the limit exhaust gas temperature. At this time, in order to avoid that the exhaust gas measurement temperature is limited to the limit exhaust gas temperature and the change in the operation control point of the gas turbine 1 is restricted, the control device 14 satisfies the setting condition when the load is increased. In this case, the restriction of the exhaust gas measurement temperature due to the limit exhaust gas temperature of the limit temperature adjustment line T3 is released.

  Here, the setting conditions will be described. The setting condition includes at least one of the first to third conditions. The first condition is a condition in which the operation control point shifts to the preceding setting line T2 without the exhaust gas measurement temperature following the rated exhaust gas temperature of the rated temperature adjustment line T1. That is, the first condition is that the operation of the gas turbine 1 is not feedback-controlled so that the exhaust gas measurement temperature becomes the rated exhaust gas temperature of the rated temperature adjustment line T1, and the exhaust gas measurement temperature is preceded by the preceding setting line T2. This is a condition for changing the operation control point of the gas turbine 1 so that the exhaust gas temperature is reached. The second condition is a condition for opening the opening of the inlet guide vane 22 so that the exhaust gas measurement temperature is lower than the preceding exhaust gas temperature of the preceding setting line T2. The third condition is a condition in which the pressure ratio of the compressor 11 increases. That is, the third condition is a condition for the control device 14 to detect an increase in the pressure ratio of the compressor 11 based on the measurement result measured by the pressure gauge 51.

  The control device 14 determines whether or not the above setting condition is satisfied when the load is increased. When the control device 14 determines that the above set condition is satisfied, the operation control point of the gas turbine 1 becomes the limit temperature by releasing the limit of the exhaust gas measurement temperature by the limit exhaust gas temperature of the limit temperature adjustment line T3. It is allowed to displace beyond the adjustment line T3. Therefore, the control device 14 can perform temperature control by changing the operation control point of the gas turbine 1 so that the exhaust gas measurement temperature exceeds the limit exhaust gas temperature of the limit temperature adjustment line T3.

  As described above, according to the fourth embodiment, when the exhaust gas measurement temperature becomes slower than the limit exhaust gas temperature when the load is increased, the limit temperature adjustment line T3 is exceeded under the set conditions. By allowing the operation control point to change, the operation control point can be suitably changed without the exhaust gas measurement temperature being limited by the limit exhaust gas temperature.

  In the fourth embodiment, the exhaust gas thermometer 52 is simply described as an exhaust gas thermometer 52. However, the exhaust gas thermometer 52 includes a blade path thermometer 52a and an exhaust portion thermometer 52b, and the blade path thermometer 52a has a quick response. The exhaust thermometer 52b has a slow response. For this reason, the temperature control of the fourth embodiment is useful when the exhaust gas measured temperature is measured by the exhaust portion thermometer 52b, and when the temperature control is performed using the blade path thermometer 52a, the gas is controlled. The operation control point of the turbine 1 may be limited so as not to exceed the limit temperature adjustment line T3.

  Next, the control device 14 according to the fifth embodiment will be described with reference to FIG. FIG. 7 is an explanatory diagram relating to an example of temperature control in the fifth embodiment. In the fifth embodiment, parts different from the first to fourth embodiments will be described in order to avoid redundant descriptions, and parts having the same configurations as those of the first to fourth embodiments will be described with the same reference numerals. In the fifth embodiment, when the preset condition is satisfied at the time of increasing the load, the limit exhaust gas temperature of the limit temperature adjustment line T3 is set larger than the exhaust gas measurement temperature.

  As shown in FIG. 7, when the operation control point of the gas turbine 1 is on the rated temperature adjustment line T2, when the control device 14 increases the load, the limit exhaust gas temperature on the limit temperature adjustment line T3 is increased. Decreases with it. At this time, the exhaust gas measurement temperature may be slower in response than the limit exhaust gas temperature. For this reason, in order to avoid that the exhaust gas measurement temperature is limited to the limit exhaust gas temperature and the change in the operation control point of the gas turbine 1 is restricted, the control device 14 satisfies the setting condition when the load is increased. In this case, the limit exhaust gas temperature of the limit temperature adjustment line T3 is set higher than the exhaust gas measurement temperature so that the exhaust gas measurement temperature is not limited to the limit exhaust gas temperature. Since the setting conditions are the same as those in the fourth embodiment, description thereof is omitted.

  The control device 14 determines whether or not a setting condition is satisfied when the load is increased. When the control device 14 determines that the setting condition is satisfied, the operation control point of the gas turbine 1 is set to the limit temperature adjustment line T3 by making the limit exhaust gas temperature of the limit temperature adjustment line T3 larger than the exhaust gas measurement temperature. Displace it so that it does not get caught on. For this reason, the control device 14 can control the temperature by changing the operation control point of the gas turbine 1 so that the exhaust gas measurement temperature does not reach the limit exhaust gas temperature of the limit temperature adjustment line T3.

  As described above, according to the fifth embodiment, when the exhaust gas measurement temperature becomes slower than the limit exhaust gas temperature when the load is increased, the limit exhaust gas temperature is set to the exhaust gas under the set conditions. By making it larger than the measured temperature, the operation control point can be suitably changed without the exhaust gas measured temperature being limited by the limit exhaust gas temperature.

DESCRIPTION OF SYMBOLS 1 Gas turbine 11 Compressor 12 Combustor 13 Turbine 14 Controller 15 Generator 18 Rotor 22 Inlet guide vane 22a Blade body 22b IGV operation part 34 Fuel supply line 35 Fuel adjustment valve 51 Pressure gauge 52 Exhaust gas thermometer 52a Blade path temperature Total 52b Exhaust section thermometer A Air F Fuel A1 Compressed air T1 Rated temperature adjustment line T2 Preset line T3 Limit temperature adjustment line L1 IGV rated angle line L2 Exhaust gas temperature limit line P Rated point

Claims (10)

Control of a system in which the sucked air is compressed by a compressor to become compressed air, combustion gas is generated by mixing the supplied fuel and the compressed air and burning, and a turbine is operated by the generated combustion gas In the device
In accordance with the load of the system, load control is performed to change the operation control point for controlling the operation of the system,
A rated temperature control line for controlling the temperature of the exhaust gas at a predetermined load to a rated exhaust gas temperature at which the performance of the system becomes a rated performance; and
A preceding setting line for setting the exhaust gas temperature at a predetermined load to a preceding exhaust gas temperature that is lower than the rated exhaust gas temperature;
The operation of the system is controlled based on a limit temperature adjustment line for temperature control so that the exhaust gas temperature at the predetermined load does not exceed a limit exhaust gas temperature higher than the rated exhaust gas temperature. A control device characterized by that.   When the load fluctuates, the operation control point is shifted to the preceding setting line, and after the operation control point is changed along the preceding setting line, the load becomes a target load to be targeted. The control device according to claim 1, wherein the operation control point is shifted to the rated temperature adjustment line.   After the operation control point is changed so that the exhaust gas temperature becomes lower than the preceding exhaust gas temperature of the preceding setting line at the time of increasing the load at which the load increases, the target that the load targets The control device according to claim 1, wherein when the load is reached, the operation control point is shifted to the rated temperature control line.   When the load is lowered so that the load is lowered from the temperature control state where the exhaust gas temperature becomes the rated exhaust gas temperature of the rated temperature adjustment line, the limit exhaust gas temperature of the limit temperature adjustment line is set to the rated temperature. 4. The operation control point is shifted from the rated temperature adjustment line to the preceding setting line after changing the temperature adjustment line to the rated exhaust gas temperature. The control device according to item. The limit exhaust gas temperature of the limit temperature adjustment line is defined as a function of the pressure ratio of the compressor,
The exhaust gas temperature is an exhaust gas measurement temperature measured by an exhaust gas thermometer,
When the exhaust gas measurement temperature exceeds the limit exhaust gas temperature of the limit temperature adjustment line and satisfies a preset setting condition when the load is increased, the exhaust gas measurement temperature is 5. The control device according to claim 1, wherein the operation control point is allowed to change beyond the limit exhaust gas temperature of a limit temperature adjustment line. 6. The limit exhaust gas temperature of the limit temperature adjustment line is defined as a function of the pressure ratio of the compressor,
The exhaust gas temperature is an exhaust gas measurement temperature measured by the exhaust gas thermometer,
When the exhaust gas measurement temperature exceeds the limit exhaust gas temperature of the limit temperature adjustment line and satisfies a preset setting condition at the time of load increase in which the load increases, the limit temperature adjustment line The control device according to any one of claims 1 to 4, wherein a limit exhaust gas temperature is set higher than the exhaust gas measurement temperature. The compressor has an inlet guide vane capable of adjusting the opening provided on the intake side,
The setting conditions are:
A first condition in which the exhaust gas temperature does not follow the rated exhaust gas temperature of the rated temperature adjustment line, and the operation control point shifts to the preceding setting line;
A second condition for opening the opening of the inlet guide vane such that the exhaust gas temperature is lower than the preceding exhaust gas temperature of the preceding setting line;
8. The control device according to claim 6, wherein the control device includes at least one of a third condition in which a pressure ratio of the compressor increases. The compressor has an inlet guide vane capable of adjusting the opening provided on the intake side,
The control device according to claim 1, wherein the operation control point is changed by adjusting an opening degree of the inlet guide vane. A compressor that compresses the sucked air into compressed air;
A combustor that generates combustion gas by supplying fuel to the compressed air and burning it;
A turbine operated by the generated combustion gas;
A system comprising: the control device according to claim 1. Control of a system in which the sucked air is compressed by a compressor to become compressed air, combustion gas is generated by mixing the supplied fuel and the compressed air and burning, and a turbine is operated by the generated combustion gas In the method
In accordance with the load of the system, load control is performed to change the operation control point for controlling the operation of the system,
A rated temperature control line for controlling the temperature of the exhaust gas at a predetermined load to a rated exhaust gas temperature at which the performance of the system becomes a rated performance; and
A preceding setting line for setting the exhaust gas temperature at a predetermined load to a preceding exhaust gas temperature that is lower than the rated exhaust gas temperature;
The operation of the system is controlled based on a limit temperature adjustment line for temperature control so that the exhaust gas temperature at the predetermined load does not exceed a limit exhaust gas temperature higher than the rated exhaust gas temperature. A control method characterized by that.

Images