JP5254112B2 - Gas turbine power generation equipment and clearance control system backup air supply method - Google Patents

Description

  The present invention relates to a power generation facility having a gas turbine system, that is, a gas turbine power generation facility, and more particularly, to a gas turbine clearance control system for controlling a clearance between a moving blade and a casing of a gas turbine of a gas turbine system and a turbine turbine. About things.

  In a power generation facility having a gas turbine system, the clearance during operation may be reduced by controlling the clearance between the moving blade of the gas turbine and the casing in order to improve the performance. As described above, as a method of reducing the clearance between the casing and the blade tip, the blade ring is cooled with steam, and the clearance between the blade tip and the blade ring is controlled by adjusting the cooling steam to reduce the clearance. A technique for appropriately holding is known (for example, see Patent Document 1).

  Further, in a combined cycle power generation facility that combines a gas turbine system and a steam turbine, in order to prevent rubbing at the start of the gas turbine and gas turbine air compressor of the gas turbine system and to improve the thermal efficiency of the stage during load operation, the gas turbine It is also known to control the clearance between the blade and casing of a gas turbine air compressor.

  As described above, the gas turbine clearance control system for controlling the clearance between the blade tip of the gas turbine or the gas turbine air compressor and the casing controls the clearance between the blade and the casing of the gas turbine or the gas turbine air compressor. In order to achieve this, the thermal elongation in the casing of the gas turbine and gas turbine air compressor is controlled. For this purpose, the gas turbine clearance control system supplies, for example, air, which is a medium used for heat exchange to the casing, and adjusts its temperature, pressure, or flow rate.

  Regarding power generation equipment having a gas turbine system, a single cycle of a gas turbine system (that is, a system combining a gas turbine, a gas turbine air compressor and a combustor), a combination of one gas turbine system and one steam turbine. A combined cycle, a combined cycle in which a plurality of gas turbine systems and a smaller number of steam turbines are combined, and the like, are referred to below as a gas turbine power generation facility.

  As described above, in the conventional gas turbine clearance control system, in order to control the clearance between the moving blade and the casing of the gas turbine and the gas turbine air compressor, the air controlled to an appropriate temperature is supplied to the gas turbine and the gas. The clearance between the moving blades and the casing of the gas turbine and the gas turbine air compressor is controlled by supplying the turbine air compressor and controlling the thermal elongation.

  When air is used as the heat exchange medium, the air compression is performed by circulating air in a closed loop flow path provided between the clearance control system, the gas turbine, and the gas turbine air compressor. Control the casing temperature of the machine. However, due to the structure of the gas turbine and the gas turbine air compressor, the closed loop flow path cannot be a completely closed space, and a certain amount of air leaks out of the system. For this reason, the gas turbine clearance control system needs to be filled with the leaked air in order to keep the amount of circulating air constant.

  Therefore, in the conventional gas turbine clearance control system, it is possible to fill the leaked air by providing a high-pressure air supply source including a filling air compressor and a filling air reservoir for filling the air.

  As a back-up air supply source for this charged air compressor, it is possible to use the discharge air from the gas turbine air compressor of the gas turbine system whose own shaft, that is, the gas turbine clearance control system tries to control the thermal expansion. It was. Therefore, when the gas turbine system is operating, the gas turbine clearance control system can supply the charged air into the system using the discharge air discharged from the self-shaft gas turbine air compressor. For this reason, in the conventional gas turbine clearance control system, if the self-shaft gas turbine air compressor is in operation, it is possible to reduce in-house power without operating the filling air compressor.

JP 2001-248406 A

  However, since the gas turbine air compressor is not operated before the gas turbine system is started, the discharge air discharged from the gas turbine air compressor cannot be used as a backup air supply source. Had to drive. In general, since a power plant having a gas turbine system is started and stopped at a relatively high frequency for load adjustment and the like, the frequency of operating the charged air compressor is increased. In some cases, a spare air compressor is provided in case of failure or repair. In such a case, the conventional gas turbine clearance control system has a problem that the equipment configuration is complicated and maintenance is complicated, and the equipment cost is increased.

  The present invention was made to solve the above problems, and by providing a high-pressure charged air backup supply source that can be supplied even when the gas turbine is started, the number of charged air compressors is reduced and the configuration is simplified. It is an object of the present invention to provide a gas turbine power generation facility with improved operability and a clearance control system backup air supply method.

  In order to achieve the above object, the present invention provides a first gas turbine system including a first gas turbine and a first gas turbine air compressor arranged coaxially, and the first gas turbine system is separate from the first gas turbine system. A second gas turbine system including a second gas turbine and a second gas turbine air compressor arranged on the shaft of the first gas turbine system, and heat exchange air whose temperature, pressure and flow rate are controlled. A first gas that controls a clearance between the moving blades of at least one of the first gas turbine and the first gas turbine air compressor of the first gas turbine system and the casing. A turbine clearance control system, a charge air compressor, and a charge air reservoir for storing charge air from the charge air compressor; The charged air compressor and the charged air in a first air system including a flow path of the heat exchange air provided in a casing of the first gas turbine clearance control system and the first gas turbine system A clearance control air supply system for charging the filling air from a waste, and a filling air backup supply system for supplying discharge air from the first gas turbine air compressor to the clearance control air supply system as backup air for the filling air And an other-shaft gas turbine air compressor discharge air system for supplying discharge air from the second gas turbine air compressor of the second gas turbine system to the clearance control air supply system as the backup air. It is characterized by.

In order to achieve the above object, the present invention provides a first gas turbine system including a first gas turbine and a first gas turbine air compressor arranged coaxially, and the first gas turbine system. And a second gas turbine system comprising a second gas turbine and a second gas turbine air compressor arranged on separate shafts, and heat exchange air with controlled temperature, pressure and flow rate as the first gas A gas turbine that supplies a casing of a turbine system and controls a clearance between the casing and at least one of the first gas turbine and the first gas turbine air compressor of the first gas turbine system. a clearance control system, a charge air compressor, a reservoir filled air for storing charge air from the charge air compressor A first air system including a flow path for the heat exchange air provided in a casing of the gas turbine clearance control system and the first gas turbine system; A clearance control air supply system for charging the filling air, a filling air backup supply system for supplying discharge air of the first gas turbine air compressor to the clearance control air supply system as backup air for the filling air, A gas turbine power generation comprising: an other-shaft gas turbine air compressor discharge air system that supplies discharge air from a second gas turbine air compressor of the second gas turbine system to the clearance control air supply system as the backup air Equipment clearance In the method of supplying cement roll system backup air, the gas turbine clearance control system and the first air in the system including a flow path of the heat exchange air provided in the casing of the gas turbine system, before Symbol second The discharge air from the 2nd gas turbine air compressor of a gas turbine system is supplied as backup air, It is characterized by the above-mentioned.

  According to the gas turbine clearance control system of the present invention, the discharge air of the other-axis gas turbine air compressor that can be supplied even when the gas turbine is started is used as a high-pressure charged air backup supply source, so that the installation of the charged air compressor is performed. The number can be reduced and the configuration can be simplified.

The block diagram which shows schematic structure of the gas turbine power generation equipment of the 1st Embodiment of this invention. The block diagram which shows schematic structure of the gas turbine power generation equipment of the 2nd Embodiment of this invention. The block diagram which shows schematic structure of the gas turbine power generation equipment of the 3rd Embodiment of this invention. The block diagram which shows schematic structure of the gas turbine power generation equipment of the 4th Embodiment of this invention.

  Embodiments of a gas turbine clearance control system according to the present invention will be described below with reference to the drawings. Here, in each drawing, the same code | symbol is attached | subjected to the same or similar part, and duplication description is abbreviate | omitted.

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

  First, the configuration of the gas turbine clearance control system will be described with reference to FIG.

  As shown in the figure, a gas turbine clearance control system 20 in a range indicated by a one-dot chain line includes a first gas turbine and a gas turbine 1 which are a first gas turbine air compressor and a gas turbine arranged coaxially. This is a system for controlling the temperature and flow rate of heat exchange air when supplying heat exchange air as a heat exchange medium to a casing (not shown) of a first gas turbine system comprising an air compressor 2. .

  The clearance control system 20 includes a circulation air compressor 4 for circulating air through a heat exchange air flow path provided between the gas turbine 1 and the gas turbine air compressor 2 and the clearance control system 20. An air cooler 3 for maintaining the inlet temperature of the air compressor 4 at an appropriate constant temperature, and an air heater 5 for controlling the heat exchange air from the circulating air compressor 4 to an appropriate air temperature; It is equipped with. With this configuration, air that is a medium controlled in the clearance control system 20 is supplied to the heat exchange flow path provided in the casing of the gas turbine 1 via the clearance control air supply pipe 13. In the present embodiment, the clearance control system 20 controls the thermal expansion in the casings of both the gas turbine 1 and the gas turbine air compressor 2, but the clearance control system 20 is used for the gas turbine 1 or the gas turbine. It is also possible to control the thermal elongation in the casing of only one of the air compressors 2.

  The air that has exchanged heat by flowing through the flow path in the casing of the gas turbine 1 is led to the gas turbine air compressor 2 through the intermediate pipe 15 and the manifold 18. The air supplied with the temperature, pressure and flow rate controlled by the clearance control system 20 flows through the flow passages in the casings of the gas turbine 1 and the gas turbine air compressor 2 in this way to exchange heat and heat the casing. By controlling the elongation, it is possible to control the clearance between the moving blades (not shown) of the gas turbine 1 and the gas turbine air compressor 2 and the casing.

  The heat exchanged in the casings of the gas turbine 1 and the gas turbine air compressor 2 is led to the clearance control system 20 via the manifold 17 and the clearance control air return pipe 14. The air returned to the clearance control system 20 is controlled again to an appropriate state, and is supplied again to the gas turbine 1 and the gas turbine air compressor 2 through the clearance control air supply pipe 13.

  Since the air system that is a flow path of heat exchange air including the gas turbine 1, the gas turbine air compressor 2, and the clearance control system 20 described above is not a completely closed space in terms of structure, a certain amount is required. Air will leak out of the system. Since it is necessary to fill the leaked air, the gas turbine power generation facility of the present embodiment has a clearance control air supply system 30 including a filling air reservoir 8 for filling air, a filling air reservoir 8 and a filling air flow rate adjusting valve 9. Is provided. That is, in the clearance control air supply system 30, the charging air from the charging air compressor 6 passes through the clearance control air return pipe 14 through the charging air reservoir 8 and the charging air flow rate adjustment valve 9, through the heat exchange air flow path. It is introduced into an air system, and the pressure, flow rate and temperature are appropriately maintained via the air cooler 3, the circulating air compressor 4 and the air heater 5 of the clearance control system 20, via the clearance control air supply pipe 13. And supplied to the gas turbine 1.

  Further, the discharge air of the gas turbine air compressor 2 of the gas turbine 1 is led out via the manifold 16 via the gas turbine air compressor discharge air bleed pipe 11 and then via the filled air backup supply system 10. Then, the air is introduced between the filling air reservoir 8 and the filling air flow rate adjusting valve 9 in the clearance control air supply system 30.

  As described above, when starting the gas turbine system, the clearance control system 20 increases the clearance with the moving blades by heating and thermally extending the casings of the gas turbine 1 and the gas turbine air compressor 2, The rubbing between the rotor blade and the casing is to be prevented.

  Normally, the clearance control system 20 starts operation before starting the gas turbine system. However, before the gas turbine system is started up, the gas turbine air compressor 2 is of course stopped, and it is necessary to operate the charged air compressor 6, which directly leads to an increase in in-house power.

  Therefore, in the present embodiment, the discharge air of the gas turbine air compressor 2 of the gas turbine system to which the heat exchange air from the clearance control system 20 is supplied as the backup air supply source of the filling air is the clearance control air. In addition to the above-described charged air backup system 10 to be supplied to the supply system 30, a gas turbine air compressor of another shaft which is a second gas turbine (not shown) provided on a separate shaft from the first gas turbine. The other-shaft gas turbine air compressor discharge air system 12 that can supply the discharge air (not shown) to the clearance control air supply system 30 is provided.

  That is, in the present embodiment, the discharge air from the gas turbine compressor of the gas turbine other than the gas turbine (other shaft) to which the clearance control system 20 supplies heat exchange air is used as the discharge air from the other shaft gas turbine air compressor. It is possible to supply the clearance control air supply system 30 to the clearance control system 20 through the system 12 as backup air.

  In the present embodiment, the other-shaft gas turbine air compressor discharge air system 12 is used as the discharge air of the gas turbine compressor 2 of its own shaft (that is, the gas turbine to which the clearance control system 20 supplies heat exchange air). Is connected to the filling air backup system 10 that supplies the clearance control air supply system 30 to the discharge air from the other-axis gas turbine compressor supplied from the other-shaft gas turbine air compressor discharge air system 12. Although it is made to supply to the clearance control air supply system 30 via the air backup system 10, it is not restricted to this example, The other axis gas turbine air compressor discharge air system 12 is connected directly to the clearance control air supply system 30. Supplied from the other-shaft gas turbine air compressor discharge air system 12 It is also possible to adopt a configuration for supplying discharge air to directly clearance control air supply system 30 from the other axis of the gas turbine compressor.

  According to the present embodiment configured as described above, the gas turbine of the first gas turbine system (own shaft) in which the clearance control system 20 supplies the heat exchange air by providing the charged air backup supply system 10. When the self-shaft gas turbine air compressor 2 is operating by enabling supply of the filling air from the discharge air of the air compressor 2, the air from this filling air backup system is backed up with the filling air. The system can be used as a supply source, and the system can be filled with air without operating the filled air compressor 6, and the power in the station can be reduced.

  Furthermore, even when the first gas turbine that is the own shaft is not in operation, the discharge air of the gas turbine air compressor of the second gas turbine system that is the other shaft is compressed by the other shaft gas turbine air compression. It can be used as a back-up supply source of filling air for the self-axis clearance control system 20 via the machine discharge system 12. For this reason, even if the self-shaft gas turbine system is not started, if the gas turbine air compressor of the other shaft is in operation, there is no need to operate the filled air compressor 6, so the power in the station is greatly reduced. Can be achieved.

  Conventionally, since a backup supply source of the filling air is required even when the gas turbine system is started up, the filling air compressor 6 is replaced with a spare filling air in consideration of a failure or repair of the filling air compressor. Although there is an example in which two units including the compressor are installed in parallel, according to the present embodiment, the gas turbine compressor of the other shaft gas turbine can be used as a backup supply source of the charging air. One air compressor 6 can be installed, which can greatly contribute to the reduction of the initial cost of the clearance control system 20. Further, even when two of the filled air compressors 6 including the spare machine are installed in parallel, a more reliable system can be achieved.

  FIG. 2 is a configuration diagram showing a schematic configuration of a gas turbine clearance control system according to the second embodiment of the present invention. Parts that are the same as or similar to those in FIG.

  As shown in the figure, the gas turbine clearance control system includes a gas turbine air compressor discharge air bleed pipe 11 connected to a charged air backup supply pipe 10 and bleeds from an intermediate stage of the first gas turbine air compressor 2. The air is supplied. The gas turbine air compressor discharge air extraction pipe 11 is connected to the middle of the gas turbine air compressor intermediate stage extraction pipe 19. The gas turbine air compressor intermediate stage bleed pipe 19 is connected between the intermediate stage of the gas turbine air compressor 2 and the gas turbine 2 via a manifold 21. A part of the extracted air from the intermediate stage of the gas turbine air compressor 2 is guided to the gas turbine air compressor discharge air pipe 11. Another part of the bleed air from the intermediate stage of the gas turbine air compressor 2 is led through a manifold 21 to a cooling passage provided in a portion of the stationary part such as a casing of the gas turbine 1 where the temperature becomes high. The stationary part of the gas turbine 1 is cooled. Moreover, the remaining part which is not guide | induced to the manifold 21 among the extraction air from the intermediate | middle stage of the gas turbine air compressor 2 is discharged by the downstream part of a gas turbine.

  That is, in the present embodiment, the gas turbine air compressor discharge air bleed pipe 11 is connected to the gas turbine air compressor intermediate stage bleed pipe 19 connected to the intermediate stage of the gas turbine air compressor 2, and the charged air A clearance control air supply system 30 to a clearance control system 20 is connected via a backup supply system 10.

  Here, in the conventional gas turbine system, air is extracted from an intermediate stage of the gas turbine air compressor 2, and this extracted air is used for cooling a portion of the stationary component of the gas turbine 1 that becomes high temperature via the manifold 21. There is something that is structured as follows. The present embodiment is suitable when the present invention is applied to a gas turbine power generation facility including such a gas turbine system. In the present embodiment, the air is extracted via the gas turbine air compressor intermediate stage extraction pipe 19. Since the cooled air cools the casing of the gas turbine 1 via the clearance control air supply pipe 13, the supply air is supplied to the intermediate stage bleed air of the gas turbine air compressor 2 which is an existing system. It can be used as a source.

  In addition, the other-shaft gas turbine air compressor discharge air system 12 that supplies discharge air from the second gas turbine air compressor was also extracted from the intermediate stage of the second gas turbine air compressor (not shown). A configuration in which air is supplied is also possible.

  According to the present embodiment, the same effects as those of the first embodiment can be obtained, and according to the present embodiment, an existing gas turbine cooling system can be used. It becomes possible to easily apply the clearance control system. FIG. 3 is a configuration diagram showing a schematic configuration of a gas turbine clearance control system according to a third embodiment of the present invention. Parts that are the same as or similar to those in FIG. 1 and FIG.

  As shown in the figure, the gas turbine clearance control system is configured to provide heat to each gas turbine system of a gas turbine power plant including a plurality of gas turbine systems including a gas turbine 1 and a gas turbine air compressor 2 arranged coaxially. A clearance control system 20 is provided for controlling the clearance between the moving blade and the casing of the gas turbine 1 and the gas turbine air compressor 2 of each gas turbine system by controlling the elongation. Here, a gas turbine power generation facility including three gas turbine systems is illustrated.

  Each of the three gas turbine systems is provided with a gas turbine 1 and a gas turbine air compressor 2. And the clearance control system 20 which supplies the air as a heat exchange medium by controlling the temperature, the pressure, and the flow rate is provided in the casing of each gas turbine system. The three clearance control systems 20 are a clearance control air supply comprising a filling air compressor 6, a filling air reservoir 8, a check valve 25, a pipe 23, a common pipe 24, and a clearance control filling air pressure control valve 28. It is connected to the system 30.

  The filling air compressor 6 is a compressor for supplying filling air to each air system which is a flow path of heat exchange air of each gas turbine including the clearance control system 20 via the clearance control air supply system 30; The filling air from the filling air compressor 6 is connected to a common pipe 24 via a pipe 23 via a filling air reservoir 8 for filling air and a check valve 25. Filling air to each clearance control system 20 is supplied from a common pipe 24 with its pressure adjusted through a clearance control filling air pressure regulating valve 28.

  Heat exchange air, which is a heat exchange medium whose temperature, pressure, and flow rate are controlled in the clearance control system 20, is supplied to the gas turbine 1 via the clearance control air supply pipe 13. The heat exchange air supplied from the clearance control system 20 exchanges heat in the casings of the gas turbine 1 and the gas turbine air compressor 2 of each gas turbine system, and controls the thermal expansion of the casing of each gas turbine system. Thus, the clearance between the moving blades of the gas turbine 1 and the gas turbine air compressor 2 and the casing is controlled. The controlled and supplied air is led to the gas turbine air compressor 2 through the intermediate pipe 15 and the manifold 18.

  The air heat-exchanged in the casings of the gas turbine 1 and the gas turbine air compressor 2 of each gas turbine system is led to the clearance control system 20 via the manifold 17 and the clearance control air return pipe 14. The air returned to the clearance control system 20 is again controlled to an appropriate state, and is supplied to the gas turbine 1 and the gas turbine air compressor 2 through the clearance control air supply pipe 13. Thus, each gas turbine system is provided with each air system that is a heat exchange air flow path of each gas turbine including the clearance control system 20.

  In the present embodiment, the discharge air of the gas turbine air compressor 2 of each gas turbine system is led out via the manifold 16 via the gas turbine air compressor discharge air bleed pipe 11 and filled air backup. The air is introduced into a common pipe 24 of a clearance control air supply system 30 that supplies filling air to each clearance control system 20 via the supply system 10.

  According to the present embodiment configured as described above, the filling air compressor 6, the pre-filling air compressor 7, and the filling air reservoir 8 are commonly used in the series, so that each shaft, that is, one gas is conventionally used. The charge air compressor 6 installed for each turbine system can be installed in a common unit (or a plurality of units including a spare unit) for each series including a plurality of gas turbine systems. It can be simplified and operability can be improved.

  That is, since the clearance control air supply system 30 for supplying the charge air has the common pipe 24, the discharge air of the gas turbine air compressor 2 sharing the shafts of the plurality of gas turbines 1 is supplied to the charge air backup supply system. 10 can be connected to the clearance control air supply system 30 via the gas turbine 10. Therefore, the discharge air of the gas turbine air compressor 2 of each gas turbine system can be used as a backup supply source of the filling air to the clearance control system 20. It is possible. As a result, if at least one gas turbine system in the system is operating, it is possible to supply the charging air of the clearance control system 20 when starting the gas turbine system of the other shaft. Further, it can be kept low.

  In addition, as the discharge air of the gas turbine air compressor 2, the intermediate stage extraction air of the gas turbine air compressor 2 can also be used similarly to FIG.

  FIG. 4 is a configuration diagram showing a schematic configuration of a gas turbine clearance control system according to a fourth embodiment of the present invention. Parts that are the same as or similar to those in FIGS. 1 to 3 are denoted by common reference numerals, and redundant description is omitted.

In the present embodiment, the filled air compressor 6 shown in FIG. 3 is an existing in-house / control air compressor 27. The filling air from the in-house / control air compressor 27 is connected to the common pipe 24 via the filling air supply pipe 23 via the filling air reservoir 22 for the filling air and the check valve 25. Yes. A part of the charged air from the in-house / control air compressor 27 is returned to the in-house / control air supply system 26. That is, in the present embodiment, the clearance control air supply system 30 is used for the in-house / control air compressor 27, the filling air reservoir 22, the check valve 25, the filling air supply pipe 23, the common pipe 24, and the clearance control filling air. The pressure regulating valve 28 is used to branch the in-house / control air supply system 26 from the clearance control air supply system 30. In the present embodiment, one check valve 25 is provided on the upstream side and the downstream side of the branch portion of the in-house / control air supply system 26 so that the air is supplied as in-house / control air. A part of the filling air is configured not to flow backward.

  As described above, the present embodiment uses the in-house air / control air compressor 27 that is generally installed in an existing power plant instead of the filled air compressor. By connecting the pipe 23 to the common pipe 24, the clearance of each gas turbine system, that is, the supply of the filling air to the roll system 20 is enabled.

  According to the present embodiment, by using the in-house air / control air compressor 27 as the filling air compressor, it is not necessary to install an air compressor only for the filling air supply of the clearance control system 20. Therefore, the configuration can be further simplified, and the in-house power can be reduced as in the third embodiment. In addition, about the discharge air of the gas turbine air compressor 2 of each gas turbine system, it is also possible to use the extraction air of the intermediate | middle stage of the gas turbine air compressor 2, as shown in FIG.

  The embodiments of the present invention have been described above. However, the present invention is not limited to the embodiments described above, and departs from the gist of the present invention by combining the configurations of the embodiments. Various modifications can be made without departing from the scope.

  In particular, in each of the embodiments, the gas turbine system has been mainly described. However, the gas turbine power generation facility of the present invention includes a combined cycle in which each of the gas turbine systems is combined with a steam turbine, and a plurality of gas turbine systems. It also includes a combined cycle that combines two (or fewer than a gas turbine system) steam turbines.

  DESCRIPTION OF SYMBOLS 1 ... Gas turbine, 2 ... Gas turbine air compressor, 3 ... Air cooler, 4 ... Circulating air compressor, 5 ... Air heater, 6 ... Filling air compressor, 7 ... Pre-filling air compressor, 8 ... Filling Air reservoir, 9, 28 ... Clearance control filling air pressure control valve, 10 ... Filling air backup supply pipe, 11 ... Gas turbine air compressor discharge air bleed pipe, 12 ... Other shaft gas turbine air compressor discharge air pipe, 13 ... Clearance control air supply pipe, 14 ... Clearance control air return pipe, 15 ... Intermediate pipe, 16, 17, 18, 21 ... Manifold, 19 ... Gas turbine air compressor intermediate stage bleed pipe, 20 ... Clearance control system, 22 ... Filling Air reservoir, 23... Filled air supply piping, 24 .. common piping, 25 .. check valve, 26 .. internal / control air supply system, 27 ... in-house / control air compressor, 30 ... clearance control air supply system.

Claims (8)

A first gas turbine system comprising a first gas turbine and a first gas turbine air compressor arranged coaxially;
A second gas turbine system comprising a second gas turbine and a second gas turbine air compressor disposed on a separate axis from the first gas turbine system;
Heat exchange air whose temperature, pressure and flow rate are controlled is supplied to the casing of the first gas turbine system, and the first gas turbine and the first gas turbine air compressor of the first gas turbine system are supplied. A first gas turbine clearance control system for controlling a clearance between at least one of the rotor blades and the casing;
A filled air compressor;
A filling air reservoir for storing the filling air from the filling air compressor;
The charged air compressor and the charged air in a first air system including a flow path of the heat exchange air provided in a casing of the first gas turbine clearance control system and the first gas turbine system A clearance control air supply system for filling the filling air from the waste;
A charged air backup supply system for supplying discharge air of the first gas turbine air compressor to the clearance control air supply system as a backup air for the charged air;
An other-shaft gas turbine air compressor discharge air system for supplying discharge air from the second gas turbine air compressor of the second gas turbine system to the clearance control air supply system as the backup air;
A gas turbine power generation facility comprising:   The gas turbine power generation facility according to claim 1, wherein air extracted from an intermediate stage of the first gas turbine air compressor is supplied to the charged air backup supply system.   2. The gas turbine power generation facility according to claim 1, wherein air extracted from an intermediate stage of the second gas turbine air compressor is supplied to the other-shaft gas turbine air compressor discharge air system. .   The other-shaft gas turbine air compressor discharge air system is connected to the filling air backup system, and the backup air from the other-shaft gas turbine air compression system is supplied to the clearance control air supply system via the filling air backup system. The gas turbine power generation facility according to claim 1, wherein the gas turbine power generation facility is supplied to the turbine.   Heat exchange air whose temperature, pressure and flow rate are controlled is supplied to a casing of the second gas turbine system, and the second gas turbine and the second gas turbine air compressor of the second gas turbine system are supplied. A second gas turbine clearance control system that controls a clearance between at least one of the moving blades of the rotor and the casing, wherein the clearance control air supply system includes the second gas turbine clearance control system and the second gas turbine clearance control system. The second air system including the heat exchange air flow path provided in the casing of the gas turbine system is also configured to fill the charged air from the charged air compressor and the charged air reservoir. The gas turbine generator according to any one of claims 1 to 4, wherein Equipment.   6. The clearance control air supply system includes a common pipe, and the first air system and the second air system are configured to be able to be filled with the charged air from the common pipe. Gas turbine power generation equipment. In-house / control air supply system for taking out the charged air from the charged air compressor from the clearance control air supply system,
The gas turbine power generation facility according to any one of claims 1 to 6, further comprising: A first gas turbine system comprising a first gas turbine and a first gas turbine air compressor arranged coaxially;
A second gas turbine system comprising a second gas turbine and a second gas turbine air compressor disposed on a separate axis from the first gas turbine system;
Heat exchange air whose temperature, pressure and flow rate are controlled is supplied to the casing of the first gas turbine system, and the first gas turbine and the first gas turbine air compressor of the first gas turbine system are supplied. A gas turbine clearance control system for controlling a clearance between at least one of the rotor blades and the casing;
A filled air compressor;
A filling air reservoir for storing the filling air from the filling air compressor;
A first air system including a flow path for the heat exchange air provided in a casing of the gas turbine clearance control system and the first gas turbine system; A clearance control air supply system for filling the filling air;
A charged air backup supply system for supplying discharge air of the first gas turbine air compressor to the clearance control air supply system as a backup air for the charged air;
An other-shaft gas turbine air compressor discharge air system for supplying discharge air from the second gas turbine air compressor of the second gas turbine system to the clearance control air supply system as the backup air;
A clearance control system for a gas turbine power generation facility comprising a backup air supply method,
To the gas turbine clearance control system and the first air in the system including a flow path of the heat exchange air provided in the casing of the gas turbine system, a second gas turbine before Symbol second gas turbine system A clearance control system for a gas turbine power generation facility, wherein the discharge air from an air compressor is supplied as backup air.

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