JP2012202630A - Solar thermal power generating facility, method for controlling heliostat included in the facility, and control device for implementing the method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make uniform a temperature distribution in a heat receiver so as to improve the durability of the heat receiver.SOLUTION: A solar thermal power generating facility with a plurality of heat receiving pipes includes a heat receiver 40 where air in the heat receiving pipes is heated when the heat receiving pipes are irradiated with solar light, a turbine which is driven by air heated by the heat receiver, and a plurality of heliostats 10 which can irradiate the heat receiver with solar light reflected by means of reflecting mirrors. In the solar thermal power generating facility, a plurality of the heat receiving pipes are divided into a plurality of regions, and one heliostat group corresponds to each of the regions, and the heliostat group is constituted of a plurality of heliostats capable of irradiating the heat receiving pipes in the region with the solar light. A heliostat control device 50 includes an operating heliostat setting unit 52 which selects a heliostat to be operated from the plurality of heliostats constituting the heliostat group corresponding to a turbine load for each of the heliostat groups and an operation instruction unit 57 which provides a direction for operation to the heliostat to be operated for each of the heliostat groups.

Description

  The present invention includes a heat receiver in which sunlight is irradiated to heat an internal fluid, a turbine driven by the fluid heated by the heat receiver, sunlight reflected by a reflector, and sunlight received by the heat receiver. The present invention relates to a solar thermal power generation facility including a plurality of heliostats to be irradiated, a heliostat control method, and a control device that executes the method.

  As a solar thermal power generation facility, for example, there is one described in Patent Document 1 below.

  This solar thermal power generation facility includes a heat receiver that is irradiated with sunlight to heat an internal fluid, a turbine that is driven by the fluid heated by the heat receiver, and a solar reflector that reflects sunlight to the heat receiver. A plurality of heliostats that emit light.

  A heat receiver that receives sunlight from a plurality of heliostats may be heated by sunlight more than necessary, and durability may be reduced. For this reason, in the solar thermal power generation equipment of patent document 1, the calorie | heat amount adjustment means which adjusts the calorie | heat amount in / out of a heat receiver based on the temperature of a heat receiver or the temperature of the fluid in a heat receiver is provided.

JP 2011-32960 A

  However, the technique described in Patent Document 1 varies the temperature distribution in the heat receiver even if the amount of heat entering and exiting the heat receiver is adjusted based on the temperature of the heat receiver or the temperature of the fluid in the heat receiver. Thus, only a part of the heat receiver may become unnecessarily hot. For this reason, in the technique described in Patent Document 1, only a part of the heat receiver is heated to a temperature higher than necessary, so that the thermal deformation of the part increases and the durability of the heat receiver decreases. There is a problem.

  Then, an object of this invention is to provide the technique which can equalize the temperature distribution in a heat receiver and can improve the durability of a heat receiver.

The heliostat control device according to the invention for solving the above problems is
A heat receiver having a plurality of heat receiving tubes, where sunlight is irradiated to the heat receiving tubes to heat the fluid in the heat receiving tubes, a turbine driven by the fluid heated by the heat receivers, and a reflector A heliostat control device for a solar thermal power generation facility comprising: a plurality of heliostats that reflect sunlight with the reflector and irradiate the heat receiver with sunlight,
In the solar thermal power generation facility, a plurality of the heat receiving tubes are divided into a plurality of regions, and each of the plurality of regions includes a plurality of heliostats capable of irradiating the heat receiving tubes in the regions with sunlight. Heliostat group is supported,
A load acquisition unit that acquires the load of the turbine, and a heliostat that operates among the plurality of heliostats that constitute the heliostat group corresponding to the load of the turbine for each of the plurality of heliostat groups. A driving heliostat setting unit for determining a driving heliostat, and instructing the driving heliostat for each of the plurality of heliostat groups determined by the driving heliostat setting unit; An operation instructing unit that irradiates sunlight to the heat receiving pipe in the region corresponding to the heliostat group including a heliostat.

  In the heliostat control device, a plurality of heat receiving tubes are divided into a plurality of regions, and the heliostat to be operated is determined according to the load in the heliostat group corresponding to the region for each region. The amount of sunlight irradiated for each of the plurality of regions can be controlled, and the amount of sunlight irradiated for each of the plurality of regions can be made uniform. Therefore, according to the heliostat control device, the temperature distribution in the heat receiver can be made uniform, and it can be avoided that only a part of the heat receiver becomes unnecessarily high, and the durability of the heat receiver can be improved. Can do.

  Here, in the heliostat control device, the operation heliostat setting unit is an operation that is the number of heliostats operated in the heliostat group corresponding to the load of the turbine for each of the plurality of heliostat groups. The operation number calculation unit for obtaining the number of units and the operation set by the operation unit number setting unit preferentially for a heliostat having a high operation priority predetermined for the plurality of heliostats constituting the heliostat group An operation heliostat determining unit that makes the operation heliostat equivalent to the number of units may be included.

  In the heliostat control device, the heliostat having a high operation priority is preferentially used as the operation heliostat corresponding to the number of operating units. Therefore, the irradiation amount of sunlight for each of the plurality of regions of the heat receiver can be more effectively reduced. Can be controlled.

  Further, in the heliostat control device, the operation priority is higher for a heliostat having a relatively small amount of heat input to the fluid in the heat receiver among the plurality of heliostats constituting the heliostat group. It may be determined to be.

  In the heliostat control device, a heliostat with a small heat input is operated stably, and conversely, a heliostat with a large heat input is likely to be a target of operation / operation exclusion. Control sensitivity of the light irradiation amount can be increased.

  In the heliostat control device, for each of a plurality of heliostats constituting the heliostat group, the amount of heat input to the fluid in the heat receiver by the heliostat is determined by all heliostats constituting the heliostat group. A value obtained by dividing the amount of heat input to the fluid in the heat receiver is determined in advance as the equivalent number of the heliostats, and the operation heliostat determination unit is configured by the heliostats for the number of the operations in order from the highest operation priority. A value obtained by summing up the equivalent number of units may be set as an equivalent number of operating units, and a heliostat having a higher priority may be preferentially used as the operating heliostats by the number of equivalent operating units.

  In the heliostat control device, the concept of the equivalent number of heliostats according to the amount of heat input of each heliostat and the equivalent number of equivalent operation is introduced, and the amount of heat input of each heliostat is considered, Since the equivalent number of operating units, which is the final operating number, is determined, the amount of heat input to the heat receiving pipes in the region corresponding to the heliostat group can be set to the target amount of heat input.

  Further, in the heliostat control device, the operation number calculation unit calculates a load of the turbine and a correction coefficient obtained by a predetermined procedure to the number of the plurality of heliostats constituting the heliostat group. Multiply the number of the heliostats in operation.

  The heliostat control device further includes a correction coefficient storage unit storing a first correction coefficient at each time for each of the plurality of heliostat groups, and the operating number calculation unit includes the correction unit storage unit. When determining the number of operating units, the first correction coefficient corresponding to the current time among the first correction coefficients of the heliostat group stored in the correction coefficient storage unit is used as at least a part of the correction coefficient. Also good.

  In the heliostat control device, since the first correction coefficient is determined for each heliostat group at any given time, it is possible to determine an appropriate number of operating units for each heliostat group.

  Moreover, in the heliostat control device, the solar thermal power generation facility includes a temperature detection unit that detects an inlet temperature and an outlet temperature of the fluid for each of the plurality of regions of the heat receiver, and the operating number calculation unit includes When determining the number of operating heliostats, the difference between the inlet temperature and the outlet temperature of the heat receiver determined by the inlet temperature and the outlet temperature for each of the plurality of areas is determined in the area corresponding to the heliostat group. A value obtained by dividing the difference between the inlet temperature and the outlet temperature may be used as a first correction coefficient, and the first correction coefficient may be used as at least a part of the correction coefficient.

  In the heliostat control device, when the difference between the outlet temperature and the inlet temperature in the region corresponding to the heliostat group is large, the number of operating heliostat groups corresponding to this region is reduced, and the heat input to this region is reduced. be able to. For this reason, in the said heliostat control apparatus, the difference of the exit temperature and entrance temperature of this area | region can be made small, and durability of a heat receiver can be improved.

  Moreover, in the heliostat control device, the solar thermal power generation facility has an inlet temperature of the fluid for each of the plurality of regions of the heat receiver, and a temperature of a portion assumed to be the highest temperature for each of the plurality of regions. A temperature detection unit that detects a high temperature part temperature, the operating number calculation unit, when obtaining the number of operating heliostat group, an average of the difference between the inlet temperature and the high temperature part temperature for each of the plurality of regions A value obtained by dividing the value by the difference between the inlet temperature and the high temperature temperature in the region corresponding to the heliostat group is used as a first correction coefficient, and the first correction coefficient is used as at least part of the correction coefficient. May be.

  In the heliostat control device, when the difference between the high temperature part temperature and the inlet temperature in the region corresponding to the heliostat group is large, the number of operating heliostat groups corresponding to this region decreases, and the amount of heat input to this region decreases. can do. For this reason, in the said heliostat control apparatus, the difference of the high temperature part temperature of this area | region and inlet_port | entrance temperature can be made small, and durability of a heat receiver can be improved.

  In the heliostat control device, the driving heliostat setting unit includes a coefficient determination unit that determines whether the first correction coefficient is equal to or greater than a predetermined upper limit value, and the coefficient determination unit that performs the first determination. When it is determined that one correction coefficient is equal to or greater than the upper limit value, a coefficient changing unit that changes the first correction coefficient to be less than the upper limit value in a predetermined method, When the first correction coefficient is changed by the coefficient changing unit after the first correction coefficient is determined, the changed first correction coefficient may be a part of the correction coefficient.

  In the heliostat control device, the first correction coefficient obtained by calculation becomes extremely large and the number of operating heliostat groups increases, so that the temperature of the region corresponding to the heliostat group becomes higher than necessary. You can avoid that.

  Further, in the heliostat control device, the solar thermal power generation facility has a high temperature part temperature which is a temperature of a part assumed to be the highest temperature in the region for each of the plurality of regions related to the heat receiving pipe, and in the region A temperature detection unit that detects a temperature of a low temperature part, which is a temperature of a part assumed to be the lowest temperature, and the operation number calculation unit corresponds to the heliostat group when obtaining the operation number of the heliostat group A second correction coefficient may be determined according to a difference between the high temperature part temperature and the low temperature part temperature in the region, and the second correction coefficient may be at least a part of the correction coefficient.

  In the heliostat control device, when the difference between the high temperature part temperature and the low temperature part temperature in the region corresponding to the heliostat group is large, the number of operating heliostat groups corresponding to this region decreases, and the heat input to this region is reduced. Can be reduced. For this reason, in the said heliostat control apparatus, the difference of the high temperature part temperature of this area | region and low temperature part temperature can be made small, and durability of a heat receiver can be improved.

The solar thermal power generation facility according to the invention for solving the above problems is
The heliostat control device, the heat receiver, the turbine, and the plurality of heliostats are provided.

  The solar thermal power generation equipment also includes the heliostat control device, so that the temperature distribution in the heat receiver becomes uniform, and it is possible to avoid that only a part of the heat receiver becomes unnecessarily high. Durability can be improved.

  Here, in the solar thermal power generation facility, at least some of the plurality of heliostats are arranged in a circumferential direction around the heat receiver, and at least some of the heliostat groups among the plurality of heliostat groups are: The circumferential position around the heat receiver may be different.

  Further, in the solar thermal power generation facility, at least some of the plurality of heliostats are arranged in a perspective direction with respect to the heat receiver, and at least some of the heliostat groups are the The position in the perspective direction with respect to the heat receiver may be different.

  In the solar thermal power generation facility, adjacent heliostat groups among the plurality of heliostat groups may share a part of the plurality of heliostats constituting each.

Further, a heliostat control method according to the invention for solving the above problems is
A heat receiver having a plurality of heat receiving tubes, where sunlight is irradiated to the heat receiving tubes to heat the fluid in the heat receiving tubes, a turbine driven by the fluid heated by the heat receivers, and a reflector A heliostat control method for a solar thermal power generation facility comprising: a plurality of heliostats capable of irradiating sunlight to the heat receiver by reflecting sunlight with the reflector;
In the solar thermal power generation facility, a plurality of the heat receiving tubes are divided into a plurality of regions, and each of the plurality of regions includes a plurality of heliostats capable of irradiating the heat receiving tubes in the regions with sunlight. Heliostat group is supported,
A load acquisition step of acquiring the load of the turbine, and a heliostat that is operated among the plurality of heliostats constituting the heliostat group corresponding to the load of the turbine for each of the plurality of heliostat groups. A driving heliostat setting step for determining a driving heliostat, and instructing the driving heliostat for each of the plurality of heliostat groups defined in the driving heliostat setting step; An operation instruction step of irradiating the heat receiving pipe in the region corresponding to the heliostat group including a heliostat with sunlight.

  In the heliostat control method, a plurality of heat receiving tubes are divided into a plurality of regions, and the heliostat to be operated is determined according to the load in the heliostat group corresponding to the region for each region. The amount of sunlight irradiated for each of the plurality of regions can be controlled, and the amount of sunlight irradiated for each of the plurality of regions can be made uniform. Therefore, according to the heliostat control method, the temperature distribution in the heat receiver is made uniform, it is possible to avoid that only a part of the heat receiver becomes unnecessarily high, and the durability of the heat receiver is improved. Can do.

  ADVANTAGE OF THE INVENTION According to this invention, the temperature distribution in a heat receiver can be equalize | homogenized, it can avoid that only a part of heat receiver becomes high temperature more than necessary, and durability of a heat receiver can be improved.

It is explanatory drawing which shows the structure of the solar thermal power generation equipment in 1st embodiment which concerns on this invention. It is a top view of solar thermal power generation equipment in a first embodiment concerning the present invention. It is explanatory drawing which shows the structure of the tower facility in 1st embodiment which concerns on this invention. It is sectional drawing of the storage in 1st embodiment which concerns on this invention. It is the VV sectional view taken on the line in FIG. It is a perspective view of the heat receiving pipe assembly in 1st embodiment which concerns on this invention. It is explanatory drawing which shows the relationship between the heliostat group in the 1st embodiment which concerns on this invention, and the area | region of a heat receiving pipe, The figure (a) is the relationship between a part of heliostat group and the area | region of a heat receiving pipe. FIG. 4B shows the arrangement of the heliostat group. It is explanatory drawing which shows the relationship between the heliostat group in the modification of 1st embodiment which concerns on this invention, and the area | region of a heat receiving pipe, The same figure (a) is the area | region of a part of heliostat group and a part of heat receiving pipe. (B) shows the arrangement of the heliostat group. It is explanatory drawing which shows the relationship between the heliostat group in the other modification of 1st embodiment which concerns on this invention, and the area | region of a heat receiving pipe, The figure (a) is a part of heliostat group and a part of heat receiving pipe. (B) shows the arrangement of the heliostat group. It is explanatory drawing which shows the driving | operation heliostat determination map in 1st embodiment which concerns on this invention. It is explanatory drawing which shows the function structure of the heliostat control apparatus in 2nd embodiment which concerns on this invention. It is explanatory drawing which shows the 1st correction coefficient map in 2nd embodiment which concerns on this invention. It is explanatory drawing which shows the relationship between the equivalent number correspondence map for driving | running heliostat determination in 2nd embodiment which concerns on this invention, the driving | running heliostat determination map, and a driving | running | working number-equivalent driving number graph. It is explanatory drawing which shows the structure of the heat receiving pipe assembly and heliostat control apparatus in 3rd embodiment which concerns on this invention. It is a flowchart which shows operation | movement of the operation number calculating part in 3rd embodiment which concerns on this invention. It is explanatory drawing which shows the structure of the heat receiving pipe assembly and heliostat control apparatus in 4th embodiment which concerns on this invention. It is principal part sectional drawing of the heat receiving pipe assembly in 4th embodiment which concerns on this invention. It is a flowchart which shows operation | movement of the operation number calculating part in 4th embodiment which concerns on this invention. It is explanatory drawing which shows the structure of the heat receiving pipe assembly and heliostat control apparatus in 5th embodiment which concerns on this invention. It is principal part sectional drawing of the heat receiving pipe assembly in 5th embodiment which concerns on this invention. It is a flowchart which shows operation | movement of the operation number calculating part in 5th embodiment which concerns on this invention. It is explanatory drawing which shows the relationship between the difference of high temperature part temperature and low temperature part temperature in 5th embodiment which concerns on this invention, and a 2nd correction coefficient. It is explanatory drawing which shows the structure of the heat receiving pipe assembly and heliostat control apparatus in 6th embodiment which concerns on this invention. It is a flowchart figure which shows operation | movement of the operation number calculating part in the 6th embodiment which concerns on this invention, a coefficient judgment part, and a coefficient change part. It is explanatory drawing which shows the change method of the 1st correction coefficient in 6th embodiment which concerns on this invention.

  Hereinafter, embodiments of a solar thermal power generation facility according to the present invention will be described in detail with reference to the drawings.

"First embodiment"
First, with reference to FIGS. 1-10, 1st embodiment of a solar thermal power generation installation is described.

  As shown in FIG. 1, the solar thermal power generation facility according to the present embodiment irradiates the heat receiver 40 with sunlight by reflecting the sunlight with the tower facility 20 having the heat receiver 40 irradiated with sunlight and the reflecting mirror 11. A plurality of heliostats 10 and a heliostat control device 50 that controls the plurality of heliostats 10.

  The heliostat 10 includes a reflecting mirror 11 that reflects sunlight, a support leg 12 that supports the reflecting mirror 11, and a drive controller 13 that directs the reflecting mirror 11 in a target direction. As shown in FIG. 2, a plurality of heliostats 10 are scattered in a ring-shaped region around the tower facility 20. In other words, a plurality of heliostats 10 are arranged 360 ° in the circumferential direction around the tower facility 20, and a plurality of heliostats 10 are also arranged in the perspective direction with the tower facility 20 as a reference.

  As shown in FIG. 3, the tower facility 20 includes the above-described heat receiver 40, a compressor 31 that supplies air to the heat receiver 40, and a gas turbine 32 that is driven by air (fluid) heated by the heat receiver 40. The generator 33 that generates power by driving the gas turbine 32, the regenerative heat exchanger 34 that exchanges heat between the air compressed by the compressor 31 and the air exhausted from the gas turbine 32, and these are housed. Storage 25 and a tower 21 on which these are placed.

  The tower 21 includes four support columns 22 extending in the vertical direction and a plurality of beams 23 connecting the four support columns 22 to each other. As shown in FIG. 2, the heliostat 10 is not disposed on the diagonal line of the four support columns 22. This is to avoid the column 22 of the tower 21 being present on the optical path of sunlight reflected by the reflecting mirror 11 of the heliostat 10 and directed to the heat receiver 40. Further, the plurality of beams 23 of the tower 21 are also arranged so as not to be present on the optical path of sunlight reflected by the reflecting mirror 11 of the heliostat 10 and toward the heat receiver 40.

  The storage 25 has a lower storage chamber 26 and an upper storage chamber 28 formed therein. A circular opening 27 for taking sunlight into the lower storage chamber 26 is formed in the lower portion of the lower storage chamber 26. A heat receiver 40 is stored in the lower storage chamber 26. The upper storage chamber 28 stores a compressor 31, a gas turbine 32, a generator 33, and a regenerative heat exchanger 34.

  The compressor 31 and the heat receiver 40 are connected via a regenerative heat exchanger 34 by a compressed air supply pipe 35 that guides the air compressed by the compressor 31 to the heat receiver 40. The heat receiver 40 and the gas turbine 32 are connected by a heated air supply pipe 36 that sends the air heated by the heat receiver 40 to the gas turbine 32. The gas turbine 32 and the regenerative heat exchanger 34 are connected by an exhaust pipe 37 that sends exhaust gas from the gas turbine 32 to the regenerative heat exchanger 34.

  4 to 6, the heat receiver 40 has a cylindrical casing 41 and a heat receiving pipe assembly 45 accommodated in the casing 41.

  The casing 41 includes a side peripheral wall plate 42 and a top plate 43, and a circular opening 44 is formed on the lower side. Both the opening 44 of the casing 41 and the opening 27 of the storage 25 described above are formed slightly larger than the spot diameter of sunlight. A heat insulating material is applied to the inner surface of the casing 41 in order to suppress radiation outside the heat energy. The casing 41 is suspended from the partition wall 29 by a hook 39 fixed to the partition wall 29 that partitions the lower storage chamber 26 and the upper storage chamber 28 of the storage 25. The lower end of the hook 39 passes through the top plate 43 of the casing 41 and is attached to the heat receiving pipe assembly 45. That is, not only the casing 41 of the heat receiver 40 but also the heat receiving pipe assembly 45 is suspended from the partition wall 29 by the hook 39.

  The heat receiving pipe assembly 45 includes a ring-shaped lower header pipe 46a, a ring-shaped upper header pipe 46b, a plurality of heat receiving pipes 47 extending in the vertical direction and connecting the lower header pipe 46a and the upper header pipe 46b, and a compressor. 31 has an inlet pipe 48 for sending air from the lower header pipe 46 a to the lower header pipe 46 a and an outlet pipe 49 for sending air from the upper header pipe 46 b to the gas turbine 32.

  The plurality of heat receiving tubes 47 are arranged at predetermined intervals in the circumferential direction of the ring-shaped lower header pipe 46a and the upper header pipe 46b. The sunlight from the heliostat 10 is basically irradiated to the heat receiving tube 47 and becomes high temperature. As described above, since the heat receiving pipe 47 is at a high temperature, it extends in the vertical direction as described above so that bending stress due to its own weight is not applied.

  The lower header pipe 46 a is located on the outer peripheral side of the casing 41 and is not housed in the casing 41. A plurality of inlet pipes 48 are connected to the outer peripheral side of the lower header pipe 46a. The plurality of inlet pipes 48 are connected to a compressed air supply pipe 35 extending from the compressor 31. A plurality of outlet pipes 49 are connected to the inner peripheral side of the upper header pipe 46b so as to connect the opposing portions of the ring-shaped upper header pipe 46b. A heated air supply pipe 36 for sending air from the heat receiving pipe assembly 45 to the gas turbine 32 is connected to a portion where the plurality of outlet pipes 49 intersect each other.

  The plurality of heat receiving pipes 47 arranged in the circumferential direction are divided into a plurality of regions a1, a2,..., Ai,. Each of the areas a1, a2,..., Ai,.

  Moreover, the area | region where the some heliostat 10 is arrange | positioned is divided into the some partial area | region in the circumferential direction centering on the tower facility 20, for example, as shown in FIG.7 (b). A plurality of heliostats 10 are arranged in each partial region, and a plurality of heliostats 10 in the partial region constitute one heliostat group A. A heliostat group identifier is set for each of the heliostat groups A1, A2,..., Ai,. Note that the number of heliostat groups A and the number of regions a related to the heat receiving pipe 47 are the same. In addition, a heliostat number (identifier) is set for each of the plurality of heliostats 10 constituting the heliostat group A.

  The heliostat group A includes a plurality of heliostats 10 constituting the heliostat group A among the plurality of areas a related to the heat receiving pipe 47, and the area a that can irradiate the plurality of heat receiving pipes 47 in the area with sunlight. , Are associated. For example, in the plurality of heat receiving tubes 47 in the region a1 in the heat receiver 40, the plurality of heliostats 10 constituting the heliostat group A1 located on the opposite side with respect to the center of the heat receiver 40 emits sunlight. Can be irradiated. For this reason, this heliostat group A1 which can irradiate sunlight here is matched with this area | region a1.

  Incidentally, in the example of FIG. 7, the plurality of heliostats 10 constituting the heliostat group A are all different from the plurality of heliostats 10 constituting the adjacent heliostat group A. However, some of the plurality of heliostats 10 constituting the heliostat group A may form part of the plurality of heliostats 10 constituting the adjacent heliostat group A as shown in FIG. In other words, adjacent heliostat groups A1 and A2 may share a part of the plurality of heliostats 10 constituting each. In this case, the heliostat 10a belonging to both of the two heliostat groups A1 and A2 irradiates the two regions a1 and a2 related to the heat receiving tube 47 with sunlight.

  In the example shown in FIGS. 7 and 8, the region a related to the heat receiving pipe 47 is divided in the circumferential direction, but as shown in FIG. 9, the area a in the vertical direction, that is, the air flow direction in the heat receiving pipe 47. May be divided. In this case, a plurality of corresponding heliostat groups A are arranged in the perspective direction with respect to the tower facility 20, and the heliostat group A11 farthest from the tower facility 20 is located in the lowermost region a <b> 11. Will respond. Also in this case, as in the example of FIG. 8, a part of the plurality of heliostats 10 constituting the heliostat group A constitutes a part of the plurality of heliostats 10 constituting the adjacent heliostat group A. May be.

  As shown in FIG. 1, the heliostat control device 50 includes a load acquisition unit 51 that acquires a load control signal indicating the load of the gas turbine 32, and a heliostat 10 that operates among the plurality of heliostats 10 (hereinafter referred to as operation). A driving heliostat setting unit 52 that determines a heliostat), a driving instruction unit 57 that gives a driving instruction to the driving heliostat, and a storage unit 60 that stores various data.

  The operation heliostat setting unit 52 includes an operation number calculation unit 53 for obtaining an operation number of the heliostat 10 corresponding to the load of the gas turbine 32 for each of the plurality of heliostat groups A, and a plurality of heliostats constituting the heliostat group A. 10, a driving heliostat determining unit 54 that uses as many driving heliostats 10 as the number of operating units determined by the operating unit calculation unit 53 is provided.

  The storage unit 60 includes a first correction coefficient 61 used when the operating number calculation unit 53 obtains the operating number of the heliostat 10, a group constituent number 62 that is the total number of heliostats 10 constituting the heliostat group A, and A driving heliostat determining map 63 used when the driving heliostat determining unit 54 determines the driving heliostat is stored.

  In the storage unit 60, all of the first correction coefficient 61, the group constituent number 62, and the driving heliostat determination map 63 are stored for each heliostat group A.

  As shown in FIG. 10, the driving heliostat determination map 63 includes the number of operating heliostats 10 among a plurality of heliostats 10 constituting the heliostat group A and the heliostat number of the driving heliostat. A map showing the relationship.

  The heliostat number assigned to each heliostat 10 constituting the heliostat group A is determined according to the driving priority. The operation priority is higher for the heliostat 10 having a relatively small amount of heat input to the air in the heat receiver 40. For this reason, here, a heliostat number having a small numerical value is assigned to the heliostat 10 having a relatively low operation amount and a relatively low heat input to the air in the heat receiver 40 relative to the air in the heat receiver 40. It is attached. Specifically, among the plurality of heliostats 10 constituting the heliostat group A, the heliostat 10 having the smallest amount of heat input to the air in the heat receiver 40 and having the highest priority has a heliostat number “1”. The heliostat 10 with the next smallest heat input is assigned a heliostat number “2”. For example, among the plurality of heliostats 10 constituting the heliostat group A shown in FIG. 7, the heliostat 10 farthest from the tower facility 20 has the smallest amount of heat input to the air in the heat receiver 40. The farthest heliostat 10 is assigned a heliostat number “1”.

  Here, the operation priority is determined in ascending order of heat input, but the operation priority may be determined in ascending order of influence on the heat receiving pipe temperature. However, regardless of whether the operation priority is determined in ascending order of the heat input amount or in the order of small influence on the heat receiving pipe temperature, the determined operation priority is basically the same with no significant difference.

  Here, the priority of operation of the heliostat 10 and the heliostat number (identifier) are the same. However, if the correspondence between the two is defined, the two need not be the same.

  Next, operation | movement of the heliostat control apparatus 50 of this embodiment is demonstrated.

  When the load acquisition unit 51 of the heliostat control device 50 receives the load control signal of the gas turbine 32 from the outside, the operation number calculation unit 53 of the operation heliostat setting unit 52 determines the load control signal for each of the plurality of heliostat groups A. The number of operating heliostats 10 corresponding to the load of the gas turbine 32 indicated by

At this time, the operating number calculation unit 53 obtains the first correction coefficient 61 of the heliostat group A for obtaining the operating number and the group configuration number 62 (the total number of heliostats 10 constituting the heliostat group A) from the storage unit 60. As shown in the following (Equation 1), the number of operating units is obtained by multiplying the load by the first correction coefficient and the number of group members.
Number of operating units = load x first correction factor x number of units in group ... (Equation 1)

  When the number of operating units for each heliostat group A is obtained by the operating unit calculating unit 53, the operating heliostat determining unit 54 selects, for each heliostat group A, from among the plurality of heliostats 10 constituting the heliostat group A. Determine the heliostat number of the driving heliostat for the number of operating vehicles.

  At this time, the driving heliostat determining unit 54 refers to the driving heliostat determining map 63 of the heliostat group A that defines the driving heliostat among the driving heliostat determining maps 63 stored in the storage unit 60. . As shown in FIG. 10, the driving heliostat determination map 63 has the horizontal axis indicating the number of operating units in the heliostat group A and the vertical axis indicating the heliostat numbers of the heliostats 10 constituting the heliostat group A. Have taken. For example, when the operating number of a certain heliostat group A is, for example, “7.3”, the driving heliostat determining unit 54 refers to the driving heliostat determining map 63 of the heliostat group A and sets the operating number “7 .3 ”is obtained, and the operation number below this heliostat number“ 8 ”, that is, the heliostat 10 having the heliostat number 1, 2, 3,. A heliostat 10 having an operation number greater than this heliostat number “8” is excluded from the operation target.

  As described above, the heliostat number is assigned according to the driving priority. For this reason, the heliostat 10 determined as the driving heliostat among the plurality of heliostats 10 constituting the heliostat group A by the driving heliostat determining unit 54 has a high driving priority. On the other hand, the heliostat 10 excluded from the driving target has a low driving priority.

  As described above, the heliostat 10 having a high operation priority has a small amount of heat input to the air in the heat receiver 40, and has an effect on the temperature change of the heat receiver 40 when the heliostat 10 is operated and not. small. On the contrary, the heliostat 10 having a low operation priority has a large amount of heat input to the air in the heat receiver 40 and has a large influence on the temperature change of the heat receiver 40 when the heliostat 10 is operated and when it is not operated. For this reason, in this embodiment, while the operation priority is high and the heliostat 10 having a relatively small influence on the temperature change of the heat receiver 40 is stably operated, the operation priority is low, and the heat receiver 40 The heliostat 10 having a relatively large influence on the temperature change is likely to be an operation / operation exclusion target, and the temperature control sensitivity of the heat receiver 40 by the heliostat control can be increased.

  When the driving heliostat number of the driving heliostat for each heliostat group A is determined by the driving heliostat determining unit 54, the driving instruction unit 57 instructs the heliostat 10 having the determined heliostat number. . The drive controller 13 of the heliostat 10 that has received this instruction directs the reflecting mirror 11 in the direction in which sunlight is directed toward the heat receiver 40. On the other hand, the reflecting mirror 11 of the heliostat 10 that has not received the driving instruction is in a state in which the sunlight is not directed toward the heat receiver 40, or the sunlight is not directed toward the heat receiver 40. It will be in the state of facing. Here, although the driving instruction unit 57 does not give any instruction to the heliostat 10 excluded from driving, it may be instructed to exclude driving.

  The heliostat 10 that has received the driving instruction irradiates the heat receiving tube 47 of the heat receiver 40 with sunlight. The heat receiving tube 47 to which the heliostat 10 emits sunlight is the heat receiving tube 47 in the region a corresponding to the heliostat group A including the heliostat 10. For example, when one heliostat 10 constituting the heliostat group A1 shown in FIG. 7 receives an operation instruction, the plurality of heat receiving pipes 47 in the region a1 corresponding to the heliostat group A1, that is, the heat receiver 40 As a reference, the plurality of heat receiving tubes 47 in the region a1 located on the opposite side to the heliostat group A1 are irradiated with sunlight.

  As described above, in the present embodiment, the plurality of heat receiving tubes 47 are divided into the plurality of regions a, and the number of operating heliostats 10 in the heliostat group A corresponding to the region a is determined according to the load. Therefore, the irradiation amount of sunlight for each of the plurality of regions a of the heat receiver 40 can be controlled, and the irradiation amount of sunlight for each of the plurality of regions a can be made uniform. Therefore, in this embodiment, the temperature distribution in the heat receiver 40 can be made uniform, it can be avoided that only a part of the heat receiver 40 becomes unnecessarily high, and the durability of the heat receiver 40 can be improved. it can.

"Second embodiment"
Next, a second embodiment of the solar thermal power generation facility will be described with reference to FIGS.

  The solar thermal power generation facility of this embodiment is different from the solar thermal power generation facility of the first embodiment only in the heliostat control device 50a. Therefore, in the following, the heliostat control device 50a of the present embodiment will be described in detail.

  Similarly to the first embodiment, the heliostat control device 50a of the present embodiment also includes a load acquisition unit 51, an operation heliostat setting unit 52a, an operation instruction unit 57, and a storage unit 60. As in the first embodiment, the driving heliostat setting unit 52a includes a driving number calculation unit 53a and a driving heliostat determination unit 54a. However, the operation contents of the operation number calculation unit 53a and the operation heliostat determination unit 54a are different from those in the first embodiment.

  The storage unit 60 includes a first correction coefficient map 61a that is used when the operating number calculation unit 53a obtains the operating number of the heliostats 10 and a group constituent number 62 that is the total number of heliostats 10 constituting the heliostat group A. And the equivalent number correspondence map 64 for determining the driving heliostat used when the driving heliostat determining unit 54a determines the driving heliostat is stored. In the storage unit 60, all of the first correction coefficient map 61a, the group configuration number 62, and the equivalent number correspondence map 64 for determining the operating heliostat are stored for each heliostat group A.

  Next, operation | movement of the heliostat control apparatus 50a of this embodiment is demonstrated.

  Also in this embodiment, when the load acquisition unit 51 receives the load control signal of the gas turbine 32 from the outside, the operation number calculation unit 53a of the operation heliostat setting unit 52a performs the load control signal for each of the plurality of heliostat groups A. The number of operating heliostats 10 corresponding to the load of the gas turbine 32 indicated by

  At this time, the operating number calculation unit 53a first determines the first correction coefficient with reference to the first correction coefficient map 61a of the heliostat group A for which the operating number is obtained.

  As shown in FIG. 12, the first correction coefficient map 61a is a map showing the relationship between time and the first correction coefficient. Here, “hour” is, for example, the time of one week in one year, and the map 61a shows the first correction coefficient in each week of one year.

  It is preferable to change the load distribution of the plurality of regions a regarding the heat receiving pipe 47 according to the position of the sun. For this reason, in order to change the first correction coefficient regarding the load distribution of the plurality of regions a according to the position of the sun, the first correction coefficient map 61a shows the first correction coefficient for each period throughout the year. Has been. The first correction coefficient map 61a shows the first correction coefficient for each period throughout the year. However, since the position of the sun changes even during the day, the first correction coefficient map 61a is further changed for each time of the day. The first correction coefficient may be indicated.

  The operating number calculation unit 53a determines the current first correction coefficient with reference to the first correction coefficient map 61a.

  Next, the number-of-operations calculation unit 53 a extracts the group configuration number 62 of the heliostat group A for which the number of operations is obtained from the storage unit 60. And the operating number calculating part 53a calculates | requires an operating number by multiplying a load with a 1st correction coefficient and a group structure number similarly to 1st embodiment.

  When the number of operating units for each heliostat group A is obtained by the operating number calculating unit 53a, the operating heliostat determining unit 54a for each heliostat group A is selected from among the plurality of heliostats 10 constituting the heliostat group A. The heliostat number of the driving heliostat corresponding to the number of operating units obtained by the operating unit calculating unit 53a is determined.

  At this time, the driving heliostat determining unit 54a determines the driving heliostat of the heliostat group A that defines the driving heliostat from the equivalent number correspondence map 64 for determining the driving heliostat stored in the storage unit 60. With reference to the equivalent number correspondence map 64, the driving heliostat in the heliostat group A is determined. For example, when the operating number of a certain heliostat group A is “7.3”, for example, the driving heliostat determining unit 54a refers to the equivalent number correspondence map 64 for determining the driving heliostat of the heliostat group A, As shown in FIG. 13, the heliostat number “7” corresponding to the operating number “7.3” determined by the operating number calculation unit 53a is acquired, and the operating number below the heliostat number “7”, that is, the heliostat number The heliostat 10 having the stat numbers 1, 2, 3,..., 7 is set as the operating heliostat, and the heliostat 10 having an operation number greater than this heliostat number “7” is excluded from the operation target.

  By the way, the equivalent number correspondence map 64 for determining the driving heliostat of the present embodiment is similar to the map 63 for determining the driving heliostat in the first embodiment. Although the heliostat number of the heliostat 10 that constitutes the heliostat group A is taken as the axis, the concept of equivalent number of operating units is introduced in the relationship between the number of operating units and the heliostat number, and the relationship between the two is determined. ing.

Here, the equivalent operating number is a value obtained by summing up the equivalent number of each heliostat 10 in the order of the heliostat number. As shown in the following (Equation 2), the equivalent number of a certain heliostat 10 constitutes the heliostat group A to which this heliostat 10 belongs, based on the amount of heat input to the air in the heat receiver 40 by the heliostat 10. It is a value divided by the amount of heat input to the air in the heat receiver 40 by all the heliostats 10.
Equivalent number = (heat input by heliostat) /
(Heat input by all heliostats in the heliostat group) (Equation 2)

  Specifically, the equivalent operation number corresponding to the heliostat number “1” is the value of the equivalent number of the heliostat 10 having the heliostat number “1”, and the equivalent operation number corresponding to the heliostat number “2” is This is a total value of the equivalent number of heliostats 10 having a heliostat number “1” and the equivalent number of heliostats 10 having a heliostat number “2”. In addition, the equivalent number of operations corresponding to the heliostat number “7” includes the equivalent number of the heliostat 10 having the heliostat number “1”, the equivalent number of the heliostat 10 having the heliostat number “2”, and the heliostat number “7”. 3 ”, the equivalent number of the heliostat 10 with the heliostat number“ 4 ”, the equivalent number of the heliostat 10 with the heliostat number“ 5 ”, and the heliostat with the heliostat number“ 7 ”. This is the total value of 10 equivalent units.

  As described above, the heliostat number is assigned a small number to the heliostat 10 having a small heat input amount to the air in the heat receiver 40, and is a large number to the heliostat 10 having a large heat input amount to the air in the heat receiver 40. Is attached. For this reason, as the heliostat number increases, the equivalent number of heliostats 10 increases. Further, the equivalent operation number corresponding to the heliostat number increases as the heliostat number increases. In other words, the equivalent operation number increases as the operation number increases.

  Therefore, as shown in the operation number-equivalent operation number graph 65 in FIG. 13, the equivalent operation number becomes larger by the equivalent number of individual heliostats 10 as the operation number increases. ing. If the operating number calculated by the operating number calculation unit 53 is “7.3”, according to the operating number-equivalent operating number graph 65, the equivalent operating number is “6.4”.

  Then, as shown in FIG. 13, the driving heliostats for the equivalent number of operations obtained previously are obtained by the driving heliostat determination map 63a in which the horizontal axis of the driving heliostat determination map 63 of FIG. Determined. If the equivalent operation number is “6.4”, the heliostat number “7” corresponding to this operation number “6.4” is determined by this operation heliostat determination map 63a, and this heliostat number “ 7 ”or less, that is, the heliostat 10 having heliostat numbers 1, 2, 3,..., 7 becomes the driving heliostat.

  As shown in FIG. 13, the equivalent number correspondence map 64 for determining the operating heliostat of this embodiment is obtained by synthesizing the operating number-equivalent operating number graph 65 and the driving heliostat determining map 63 a to obtain the equivalent operating number. This is a driving heliostat determination map that takes into account. Therefore, by using the equivalent number correspondence map 64 for determining the operating heliostat, it is possible to immediately determine the heliostat number in consideration of the equivalent operating number from the operating number obtained by the operating number calculation unit 53.

  When the heliostat number of the driving heliostat for each heliostat group A is determined by the driving heliostat determining unit 54a, the driving instruction unit 57, like the first embodiment, the heliostat 10 having the determined heliostat number. To drive.

  As described above, in the present embodiment, since the first correction coefficient is determined for each heliostat group A from time to time, it is possible to obtain an appropriate number of operating units for each heliostat group A. Further, in this embodiment, the concept of equivalent number of heliostats 10 corresponding to the amount of heat input of each heliostat 10 and equivalent operation number obtained by integrating the equivalent number is introduced, and the amount of heat input of each heliostat 10 is taken into consideration. Since the final number of operating units (equivalent operating number) is determined, the amount of heat input to the heat receiving pipe 47 in the region corresponding to the heliostat group A can be set to the target amount of heat input.

  Therefore, in this embodiment, the amount of heat input to the heat receiving pipe 47 in the region a corresponding to each heliostat group A can be controlled more appropriately than in the first embodiment, and the temperature distribution in the heat receiver 40 can be changed. It can be made more uniform.

"Third embodiment"
Next, with reference to FIG.14 and FIG.15, 3rd embodiment of a solar thermal power generation installation is described.

  The heliostat control device 50b of the present embodiment determines a first correction coefficient corresponding to the temperature condition of the heat receiving pipe assembly 45. Therefore, the heat receiving pipe assembly 45 of the present embodiment is provided with a plurality of thermometers 71 and 72 as shown in FIG.

  The inlet pipe 48 of the heat receiving pipe assembly 45 is provided with a heat receiver inlet thermometer 71 for detecting the temperature of the air passing therethrough. Moreover, the area | region exit thermometer 72 which detects the temperature of the air which passes here is provided in the exit part of one heat receiving pipe 47 among the heat receiving pipes 47 in the area | region a. This area | region exit thermometer 72 is provided for every some area | region a.

  As in the first and second embodiments, the heliostat control device 50b of the present embodiment includes a load acquisition unit 51, an operation heliostat setting unit 52b, an operation instruction unit 57, and a storage unit 60. The heliostat control device 50b of the present embodiment further includes a temperature acquisition unit 58 that acquires temperatures detected by the heat receiver inlet thermometer 71 and the region outlet thermometer 72. As in the second embodiment, the driving heliostat setting unit 52b of the present embodiment includes an operating number calculation unit 53b and an operating heliostat determining unit 54a. However, as described above, the number-of-operating-unit calculating unit 53b is different from the second embodiment in terms of determining the first correction coefficient according to the temperature condition of the heat receiving pipe assembly 45.

  Similar to the second embodiment, the storage unit 60 stores a group configuration number 62 and an equivalent number correspondence map 64 for determining an operating heliostat for each of the plurality of heliostat groups A. Further, the storage unit 60 stores identifier correspondence information 66 indicating the correspondence between heliostat group identifiers and region identifiers. On the other hand, in the storage unit 60, as described above, the first correction coefficient map 61a (FIG. 11) has a relationship in which the operating number calculation unit 53b determines the first correction coefficient according to the temperature state of the heat receiving pipe assembly 45. Not remembered.

  Next, operation | movement of the heliostat control apparatus 50b of this embodiment is demonstrated.

  Also in this embodiment, when the load acquisition unit 51 receives the load control signal of the gas turbine 32 from the outside, the operation number calculation unit 53b of the operation heliostat setting unit 52b performs the load control signal for each of the plurality of heliostat groups A. The number of operating heliostats 10 corresponding to the load of the gas turbine 32 indicated by

  In obtaining the number of operating units, the operating number calculating unit 53b first receives a turbine load from the load acquiring unit 51 as shown in the flowchart of FIG. 15 (S10). Next, the operating number calculation unit 53b determines whether or not it is a temperature reception timing (S11). This temperature reception timing comes every predetermined period.

  When the number of operating units 53b is the temperature reception timing, the inlet temperature of the heat receiver 40 detected by the heat receiver inlet thermometer 71 from the temperature acquisition unit 58 and the region provided for each of the plurality of regions a The outlet temperature of each region a detected by the outlet thermometer 72 is received and stored temporarily (S12). In addition, the temperature acquisition part 58 and the operating number calculation part 53b receive the exit temperature of the area | region which this area identifier shows with an area identifier. On the other hand, when the turbine load is received from the load acquisition unit 51, if the temperature reception timing is not reached, the stored inlet temperature of the heat receiver 40 and the outlet temperature of each region a are read (S13).

  Next, using the temperature received in step 12 or the temperature read in step 13, the operating number calculation unit 53b obtains a first correction coefficient for each of the plurality of heliostat groups A according to the following (Equation 3) ( S14).

First correction coefficient = B / A (3)
A: Area outlet temperature-area inlet temperature B: (Σ (area outlet temperature-area inlet temperature)) / number of areas

  In addition, since the inlet temperature of each area | region a is fundamentally the same as the inlet temperature of the heat receiver 40 detected with the heat receiver inlet thermometer 71, here the inlet temperature of this heat receiver 40 is set to each area | region a. It is assumed that the inlet temperature. In addition, when the operating number calculation unit 53b recognizes the outlet temperature of the region a corresponding to a certain heliostat group A, the identifier correspondence information 66 stored in the storage unit 60 is used. The operating number calculation unit 53b uses the heliostat group identifier of the heliostat group A from the identifier correspondence information 66 stored in the storage unit 60 as a search key, and the region identifier of the region a corresponding to the heliostat group A To figure out. Then, the number-of-operating-unit calculating unit 53b uses the outlet temperature of the region a associated with this region identifier among the outlet temperatures for each region received from the temperature acquisition unit 57 as the first correction coefficient for the heliostat group A. Used when seeking.

  Here, in (Equation 3), B is the difference between the outlet temperature of the heat receiver 40 and the inlet / outlet temperature. For this reason, the first correction coefficient related to a certain heliostat group A is that the difference (B) between the outlet temperature and the inlet temperature of the heat receiver 40 is the difference between the outlet temperature and the inlet temperature in the region a corresponding to this heliostat group A. The value divided by (A). Therefore, the first correction coefficient of the present embodiment becomes smaller as the difference between the outlet temperature and the inlet temperature in the region a corresponding to the heliostat group A becomes larger.

  When determining the first correction coefficient for each of the plurality of heliostat groups A, the operating number calculation unit 53b multiplies the load by the first correction coefficient and the number of group components, as in the first and second embodiments. The number of operating units for each heliostat group A is obtained (S16).

  Thus, the process by the operating number calculation unit 53b is completed.

  When the number of operating units for each heliostat group A is obtained by the operating number calculating unit 53b, the operating heliostat determining unit 54a configures the heliostat group A for each heliostat group A as in the second embodiment. The heliostat number of the driving heliostat corresponding to the number of operating units (= equivalent number of operating units) obtained by the operating unit calculating unit 53b is determined from among the plurality of heliostats 10. And the driving | operation instruction | indication part 57 instruct | indicates driving | operation with respect to the heliostat 10 of the determined heliostat number.

  In the present embodiment, the number of heliostat groups A in operation is proportional to the first correction coefficient that decreases as the difference between the outlet temperature and the inlet temperature in the region corresponding to the heliostat group A increases. For this reason, the larger the difference between the outlet temperature and the inlet temperature in the region corresponding to this heliostat group A, the smaller the number of heliostat groups A that are operated. Therefore, in this embodiment, when the difference between the outlet temperature and the inlet temperature in the region corresponding to the heliostat group A is large, the number of operating heliostat groups A corresponding to the region a decreases, and the region a enters the region a. Since the amount of heat is reduced, the difference between the outlet temperature and the inlet temperature in this region a is reduced. Therefore, according to this embodiment, durability of the heat receiver 40 can be improved.

"Fourth embodiment"
Next, with reference to FIGS. 16-18, 4th embodiment of a solar thermal power generation installation is described.

  The solar thermal power generation facility of this embodiment is a modification of the solar thermal power generation facility of the third embodiment.

  As shown in FIG. 16, the inlet pipe 48 of the heat receiving pipe assembly 45 of the present embodiment is provided with a heat receiver inlet thermometer 71 that detects the temperature of the air passing therethrough. Moreover, the high temperature part thermometer 73 which detects the temperature of the high temperature part assumed to become the highest temperature in the part of the heat receiving pipe 47 in the area | region a for every some area | region a is provided.

  As shown in FIG. 17, in the portion of the heat receiving tube 47, the surface on the ring inner peripheral side for the plurality of heat receiving tubes 47 arranged in a ring shape, that is, the surface on the side irradiated with sunlight (hereinafter referred to as the surface of the heat receiving tube 47). 47a) (the light receiving surface) becomes a high temperature. In addition, in the light receiving surface 47 a of the heat receiving tube 47, the upper part that receives sunlight from the heliostat 10 located near the heat receiver 40 is considered to be the highest temperature. Therefore, here, the upper portion of the light receiving surface 47a of the heat receiving tube 47 in the region a is a high temperature portion. Here, the upper portion of the light receiving surface 47a of the heat receiving tube 47 is a high temperature portion, but the portion may not be a high temperature portion due to the arrangement of the heliostat 10 and the like. The highest temperature part is confirmed, and this part may be used as the high temperature part.

  As shown in FIG. 16, the heliostat control device 50c of the present embodiment has a load acquisition unit 51, an operation heliostat setting unit 52c, an operation instruction unit 57, a temperature acquisition unit 58c, and a storage unit 60, as in the third embodiment. And have. Similar to the third embodiment, the driving heliostat setting unit 52c of the present embodiment includes a driving number calculation unit 53c and a driving heliostat determination unit 54a. However, since the temperature used when calculating | requiring a 1st correction coefficient is different from 3rd embodiment, the operation content calculation part 53c differs in the process content from 3rd embodiment. Moreover, the temperature acquisition part 58c of this embodiment acquires the temperature detected by the heat receiver inlet thermometer 71 and the high temperature part thermometer 73. Similar to the third embodiment, the storage unit 60 stores a group configuration number 62, identifier correspondence information 66, and an equivalent number correspondence map 64 for determining a driving heliostat for each of a plurality of heliostat groups A.

  Next, the operation of the heliostat control device 50c of this embodiment will be described.

  Also in the present embodiment, when the load acquisition unit 51 receives the load control signal of the gas turbine 32 from the outside, the operation number calculation unit 53c of the operation heliostat setting unit 52c performs the load control signal for each of the plurality of heliostat groups A. The number of operating heliostats 10 corresponding to the load of the gas turbine 32 indicated by

  When determining the number of operating units, the operating number calculating unit 53c first receives the turbine load from the load acquiring unit 51 as in the third embodiment as shown in the flowchart of FIG. 18 (S10). Next, the operating number calculation unit 53c determines whether or not it is a temperature reception timing (S11).

  When the temperature reception timing is reached, the operating number calculation unit 53c detects the inlet temperature of the heat receiver 40 detected by the heat receiver inlet thermometer 71 from the temperature acquisition unit 58c, and the high-temperature unit thermometer provided in each region. The high temperature temperature of each area detected at 73 is received and stored temporarily (S12a). In addition, the temperature acquisition part 58c and the operating number calculation part 53c receive the high temperature part temperature of the said area | region with an area | region identifier. On the other hand, when the turbine load is received from the load acquisition unit 51 and the temperature reception timing is not reached, the stored inlet temperature of the heat receiver 40 and the high temperature part temperature of each region are read (S13a).

  Next, using the temperature received in step 12a or the temperature read in step 13a, the number-of-operations calculation unit 53c calculates the first correction coefficient for each of the plurality of heliostat groups A according to the following (Equation 4) ( S14a).

First correction coefficient = B / A (4)
A: High temperature part temperature of region-inlet temperature of region B: (Σ (high temperature part temperature of region-inlet temperature of region)) / number of regions

  In the present embodiment as well, as in the third embodiment, the inlet temperature of the heat receiver 40 is set as the inlet temperature of each region. Further, when the operating number calculation unit 53c recognizes the high temperature part temperature in the region corresponding to a certain heliostat group A, the identifier correspondence information 66 stored in the storage unit 60 is used. The number-of-operations calculation unit 53c uses the heliostat group identifier of the heliostat group A from the identifier correspondence information 66 stored in the storage unit 60 as a search key, and determines the area identifier of the area corresponding to the heliostat group A. To grasp. Then, the number-of-operations calculation unit 53c performs the first correction on the heliostat group A with respect to the high-temperature part temperature of the region associated with this region identifier among the high-temperature part temperatures of each region acquired by the temperature acquisition unit 58c. Used when obtaining the coefficient.

  Here, in (Equation 4), B is an average value of the difference between the high temperature part temperature and the inlet temperature in each region. For this reason, the first correction coefficient for a certain heliostat group A is obtained by dividing the average value (B) by the difference (A) between the high temperature temperature and the inlet temperature in the region corresponding to the heliostat group A. Become. Therefore, the first correction coefficient of the present embodiment becomes smaller as the difference between the high temperature part temperature and the inlet temperature in the region corresponding to the heliostat group A becomes larger.

  When the number-of-operations calculation unit 53c obtains the first correction coefficient for each of the plurality of heliostat groups A, similarly to each of the above-described embodiments, the load is multiplied by the first correction coefficient and the number of group components to obtain a plurality of heliostats. The number of operating units for each group A is obtained (S16).

  Thus, the processing by the operating number calculation unit 53c ends.

  When the number of operating units for each heliostat group A is obtained by the operating number calculating unit 53c, the operating heliostat determining unit 54a performs, for each heliostat group A, the heliostat group A as in the second and third embodiments. The heliostat number of the driving heliostat corresponding to the number of operating units (= equivalent number of operating units) obtained by the operating unit calculating unit 53c is determined from among the plurality of heliostats 10 constituting. And the driving | operation instruction | indication part 57 instruct | indicates driving | operation with respect to the heliostat 10 of the determined heliostat number.

  In the present embodiment, the number of heliostat groups A in operation is proportional to the first correction coefficient that becomes smaller as the difference between the high temperature portion temperature and the inlet temperature in the region a corresponding to the heliostat group A becomes larger. For this reason, the larger the difference between the high temperature part temperature and the inlet temperature in the region a corresponding to the heliostat group A, the smaller the number of heliostat groups A that are operated. Therefore, in this embodiment, when the difference between the high temperature part temperature and the inlet temperature in the region a is large, the number of operating heliostats A corresponding to the region a decreases, and the amount of heat input to the region a decreases. The difference between the high temperature part temperature in this region a and the inlet temperature becomes small. Therefore, according to this embodiment, durability of the heat receiver 40 can be improved.

"Fifth embodiment"
Next, a fifth embodiment of the solar thermal power generation facility will be described with reference to FIGS.

  The solar thermal power generation facility according to this embodiment is a modification of the solar thermal power generation facility according to the fourth embodiment, and uses a second correction coefficient in addition to the first correction coefficient when obtaining the number of operating units.

  As shown in FIG. 19, the inlet pipe 48 of the heat receiving pipe assembly 45 of the present embodiment is provided with a heat receiver inlet thermometer 71 for detecting the temperature of the air passing therethrough. Further, for each of the plurality of regions a, a high-temperature portion thermometer 73 that detects the temperature of the high-temperature portion that is assumed to be the highest among the portions of the heat-receiving tube 47 in the region a, and the heat-receiving tube 47 in the region a A low-temperature part thermometer 74 that detects the temperature of the low-temperature part that is assumed to be the lowest temperature among the parts is provided.

  Also in this embodiment, as shown in FIG. 20, as in the fourth embodiment, the upper portion of the light receiving surface 47 a of the heat receiving tube 47 is set as a high temperature portion, and the temperature of this high temperature portion is detected by a high temperature portion thermometer 73. . Further, the back surface 47b of the heat receiving tube 47 opposite to the light receiving surface 47a does not reach a higher temperature than the light receiving surface 47a. Furthermore, in this back surface 47b, it seems that the lower part which receives the sunlight from the heliostat 10 which exists in the position far from the heat receiver 40 becomes the lowest temperature. Therefore, here, the lower portion of the back surface 47b of the heat receiving tube 47 in the region is set as a low temperature portion, and the temperature of this low temperature portion is detected by the low temperature portion thermometer 74. Here, the lower portion of the back surface 47b of the heat receiving tube 47 is a low temperature portion, but the portion may not be a low temperature portion due to the arrangement of the heliostat 10 and so on. It is also possible to confirm the part that has the lowest temperature and to set this part as the low temperature part.

  As shown in FIG. 19, the heliostat control device 50d of the present embodiment also includes a load acquisition unit 51, an operation heliostat setting unit 52d, an operation instruction unit 57, and a temperature acquisition unit 58d, as in the third and fourth embodiments. And a storage unit 60. Similar to the fourth embodiment, the driving heliostat setting unit 52d of the present embodiment includes a driving number calculation unit 53d and a driving heliostat determination unit 54a. However, as described above, since the number of operating units 53d uses the second correction coefficient in addition to the first correction coefficient when determining the number of operating units, the processing content is different from that of the fourth embodiment. Moreover, the temperature acquisition part 58d of this embodiment acquires the temperature detected by the heat receiver inlet thermometer 71, the high temperature part thermometer 73, and the low temperature part thermometer 74. Similar to the third and fourth embodiments, the storage unit 60 stores a group configuration number 62, identifier correspondence information 66, and an equivalent number correspondence map 64 for determining a driving heliostat for each of a plurality of heliostat groups A. ing.

  Next, the operation of the heliostat control device 50d of this embodiment will be described.

  Also in this embodiment, when the load acquisition unit 51 receives the load control signal of the gas turbine 32 from the outside, the operation number calculation unit 53d of the operation heliostat setting unit 52d performs the load control signal for each of the plurality of heliostat groups A. The number of operating heliostats 10 corresponding to the load of the gas turbine 32 indicated by

  When determining the number of operating units, the operating number calculating unit 53d first receives a turbine load from the load acquiring unit 51 as in the third and fourth embodiments as shown in the flowchart of FIG. 21 (S10). Next, the operating number calculation unit 53d determines whether or not it is a temperature reception timing (S11).

  In the case where it is the temperature reception timing, the operating unit number calculation unit 53d detects the inlet temperature of the heat receiver 40 detected by the heat receiver inlet thermometer 71 from the temperature acquisition unit 58d and the high temperature part temperature provided in each region a. The high temperature part temperature of each region a detected by the total 73 and the low temperature part temperature of each region a detected by the low temperature part thermometer 74 provided in each region a are received and stored temporarily. (S12b). Note that the temperature acquisition unit 58d and the operating unit number calculation unit 53d receive the high-temperature part temperature and the low-temperature part temperature of the area together with the area identifier. On the other hand, when the turbine load is received from the load acquisition unit 51, if it is not the temperature reception timing, the stored inlet temperature of the heat receiver 40, the high temperature part temperature and the low temperature part temperature of each region a are read (S13b). ).

  Next, using the temperature received in step 12b or the temperature read in step 13b, the number-of-operations calculating unit 53d obtains the first correction coefficient for each of the plurality of heliostat groups A according to (Equation 4) ( S14a).

  Next, the number-of-operations calculation unit 53d uses the high-temperature part temperature and low-temperature part temperature of each region received in step 12b or the high-temperature part temperature and low-temperature part temperature of each region read out in step 13b. 5), the second correction coefficient for each of the plurality of heliostat groups A is obtained (S15).

    Second correction coefficient = f (high temperature part temperature−low temperature part temperature) (Equation 5)

  In (Expression 5), f is a function for converting (high temperature part temperature−low temperature part temperature) into a second correction coefficient. As shown in FIG. 22, the function f has a maximum temperature when the temperature difference is 0, and gradually decreases the second correction coefficient as the temperature difference increases. When the value is greater than or equal to the value, the second correction coefficient is a function that makes the minimum 0. The relationship between the two for obtaining the second correction coefficient from (high temperature part temperature−low temperature part temperature) may use such a function f or a map showing such a relation. That is, a map showing the relationship as shown in FIG. 22 may be stored in the storage unit 60 in advance, and the second correction coefficient may be obtained from (high temperature part temperature−low temperature part temperature) using this map. .

Finally, as shown in the following (Equation 6), the operating number calculation unit 53d multiplies the load by the number of groups constituting the target heliostat group A, and further, step 14a for the target heliostat group A. Multiply the first correction coefficient obtained in step 2 and the second correction coefficient obtained in step 15 to obtain the number of operating units.
Number of operating units = load x first correction coefficient x second correction coefficient x number of group members (Equation 6)

  Thus, the process by the operating number calculation unit 53d is completed.

  When the number of operating units for each heliostat group A is obtained by the operating unit calculating unit 53d, the operating heliostat determining unit 54a determines the heliostat group A for each heliostat group A as in the second to fourth embodiments. The heliostat number of the driving heliostat corresponding to the number of operating units calculated by the operating number calculating unit 53d is determined from among the plurality of heliostats 10 constituting. And the driving | operation instruction | indication part 57 instruct | indicates driving | operation with respect to the heliostat 10 of the determined heliostat number.

  In the present embodiment, the number of heliostat groups A in operation is proportional to the second correction coefficient that becomes smaller as the difference between the high temperature part temperature and the low temperature part temperature in the region a corresponding to the heliostat group A increases. For this reason, the larger the difference between the high-temperature part temperature and the low-temperature part temperature in the region a corresponding to this heliostat group A, the smaller the number of heliostat groups A in operation. Therefore, in this embodiment, when the difference between the high-temperature part temperature and the low-temperature part temperature in the region a is large, the number of operating heliostat groups A corresponding to the region a decreases, and the heat input to the region a decreases. Therefore, the difference between the high-temperature part temperature and the low-temperature part temperature in this region a becomes small. Therefore, according to this embodiment, the durability of the heat receiver 40 can be further enhanced.

"Sixth embodiment"
Next, with reference to FIGS. 23-25, 6th embodiment of a solar thermal power generation equipment is described.

  The solar thermal power generation facility of this embodiment is a modification of the solar thermal power generation facility of the fifth embodiment, and limits the value of the first correction coefficient determined by the temperature state of the heat receiver 40 when determining the number of operating units.

  As shown in FIG. 23, the heat receiving pipe assembly 45 of the present embodiment is provided with a heat receiver inlet thermometer 71, a high temperature thermometer 73 in each region, and a low temperature thermometer 74 as in the fifth embodiment. Yes.

  As in the fifth embodiment, the heliostat control device 50e of this embodiment includes a load acquisition unit 51, an operation heliostat setting unit 52e, an operation instruction unit 57, a temperature acquisition unit 58d, and a storage unit 60. As in the fifth embodiment, the driving heliostat setting unit 52e according to the present embodiment includes a driving number calculation unit 53e and a driving heliostat determination unit 54a. Furthermore, the driving heliostat setting unit 52e of the present embodiment includes a coefficient determination unit 55 that determines whether or not the first correction coefficient obtained by the operating number calculation unit 53e is equal to or greater than a predetermined upper limit value, and this coefficient determination. When the unit 55 determines that the first correction coefficient is equal to or greater than a predetermined upper limit, the coefficient changing unit 56 changes the first correction coefficient to a small value. Similar to the third to fifth embodiments, the storage unit 60 stores a group configuration number 62, identifier correspondence information 66, and an equivalent number correspondence map 64 for determining a driving heliostat for each of a plurality of heliostat groups A. ing.

  Next, operation | movement of the heliostat control apparatus 50e of this embodiment is demonstrated.

  Also in the present embodiment, when the load acquisition unit 51 receives the load control signal of the gas turbine 32 from the outside, the operation number calculation unit 53e of the operation heliostat setting unit 52e performs the load control signal for each of the plurality of heliostat groups A. The number of operating heliostats 10 corresponding to the load of the gas turbine 32 indicated by

  In determining the number of operating units, the operating number calculating unit 53e first receives a turbine load from the load acquiring unit 51 as in the third to fifth embodiments (S10). Next, the operating number calculation unit 53e determines whether it is a temperature reception timing (S11).

  In the case of the temperature reception timing, the operating unit number calculation unit 53e detects the inlet temperature of the heat receiver 40 detected by the heat receiver inlet thermometer 71 from the temperature acquisition unit 58d, and the high temperature part temperature provided in each region a. The high-temperature part temperature of each region a detected by the total 73 and the low-temperature part temperature of each region a detected by the low-temperature part thermometer 74 provided in each region a are received and stored temporarily. (S12b). On the other hand, when the turbine load is received from the load acquisition unit 51, if it is not the temperature reception timing, the stored inlet temperature of the heat receiver 40, the high temperature part temperature and the low temperature part temperature of each region a are read (S13b). ).

  Next, using the temperature received in step 12b or the temperature read in step 13b, the operating number calculation unit 53e obtains the first correction coefficient for each of the plurality of heliostat groups A according to the above (Equation 4) ( S14a).

  Next, the operating number calculation unit 53e uses the high-temperature part temperature and the low-temperature part temperature of each region received in step 12b or the high-temperature part temperature and the low-temperature part temperature of each region read in step 13b. 5), the second correction coefficient for each of the plurality of heliostat groups A is obtained (S15).

  Next, the number-of-operations calculation unit 53e multiplies the load by the first correction coefficient, the second correction coefficient of the target heliostat group A, and the number of group members to obtain the number of operations (S16).

  When the number of operating units for each of the plurality of heliostat groups A is obtained by the operating number calculating unit 53e, the coefficient determining unit 55 determines whether or not the first correction coefficient for each of the plurality of heliostat groups A is equal to or greater than a predetermined upper limit value. Is determined (S17).

  If none of the first correction coefficients for each of the plurality of heliostat groups A is equal to or greater than the upper limit value, the processing by the operating number calculation unit 53e, the coefficient determination unit 55, and the coefficient change unit 56 is finished, and the second to fifth As in the embodiment, the driving heliostat determining unit 54a corresponds to the number of operating units calculated by the operating unit calculating unit 53e from the plurality of heliostats 10 constituting the heliostat group A for each heliostat group A. Determine the heliostat number of the driving heliostat. And the driving | operation instruction | indication part 57 instruct | indicates driving | operation with respect to the heliostat 10 of the determined heliostat number.

  On the other hand, when the coefficient determining unit 55 determines in step 17 that any one of the first correction coefficients for each of the plurality of heliostat groups A is equal to or higher than the upper limit value, the coefficient changing unit 56 changes the first correction coefficient. (S18).

  In changing the first correction coefficient, the coefficient changing unit 56 uses the operating number obtained by the operating number calculating unit 53e and the equivalent number correspondence map 64 for determining the driving heliostat stored in the storage unit 60. As shown in FIG. 25, when the first correction coefficient is equal to or higher than the upper limit value, the number of operating units is “9.1”, and at that time, the heliostat number determined by the equivalent unit correspondence map 64 for determining the operating heliostats. Is “8”. The coefficient changing unit 56 first obtains the maximum operation number “10.5” determined for the heliostat number “8” using the equivalent number correspondence map 64 for determining the operation heliostat.

  Next, the coefficient changing unit 56 divides the operating number “9.1” obtained by the operating number calculating unit 53e by the operating number “10.5” newly obtained by the coefficient changing unit 56 (9.1 / 10.5). Is multiplied by the first correction coefficient obtained in step 14a to obtain a new first correction coefficient. Then, the coefficient changing unit 56 passes this new first correction coefficient to the operating number calculation unit 53e.

  The operating number calculation unit 53e uses the new first correction coefficient passed from the coefficient changing unit 56 to obtain again the operating number of the heliostat group A to which this first correction coefficient corresponds (S16).

  When the number of operating units of the heliostat group A is newly obtained by the operating number calculating unit 53e, the coefficient determining unit 55 determines whether or not the new first correction coefficient of the heliostat group A is equal to or higher than the upper limit value. It is judged again (S17).

  When the new first correction coefficient of the heliostat group A is greater than or equal to the upper limit value, the coefficient changing unit 56 further changes the new first correction coefficient (S18). As shown in FIG. 25, when the number of operating units used to obtain the new first correction coefficient is “10.5”, this operating unit number “64” is determined by the equivalent unit correspondence map 64 for determining the operating heliostat. It is assumed that the heliostat number determined for “10.5” is “9”. The coefficient changing unit 56 obtains the maximum operation number “11.8” determined for the heliostat number “9” using the equivalent number correspondence map 64 for determining the operation heliostat. The coefficient changing unit 56 newly calculates a value (10.5 / 11.8) obtained by dividing the previous operating number “10.5” by the operating number “11.8” newly calculated by the coefficient changing unit 56. Multiply the correction coefficient to make this a new new first correction coefficient. And the coefficient change part 56 passes this further new 1st correction coefficient to the operating number calculating part 53e.

  As described above, the processing of step 16 to step 18 is repeated until the first correction coefficient becomes smaller than the upper limit value. When the first correction coefficient becomes smaller than the upper limit value, as described above, the processing by the operating number calculation unit 53e, the coefficient determination unit 55, and the coefficient change unit 56 ends, and the driving heliostat determination unit 54a For each heliostat group A, a heliostat number corresponding to the number of operating helicopters determined by the operating number calculation unit 53e is determined from among the plurality of heliostats 10 constituting the heliostat group A.

  As described above, in the present embodiment, when the first correction coefficient obtained by calculation is equal to or greater than the upper limit value, the first correction coefficient is changed so as to be smaller than the upper limit value. For this reason, in this embodiment, the first correction coefficient obtained by the calculation becomes extremely large, and the number of operating units of the heliostat group A increases, so that the temperature of the region corresponding to the heliostat group A is more than necessary. High temperature can be avoided.

  In the above embodiment, when the first correction coefficient is equal to or higher than the upper limit value using the equivalent number correspondence map 64 for determining the driving heliostat, the first correction coefficient is changed to a small value. The first correction coefficient may be changed to a small value by multiplying the first correction coefficient by a predetermined value, or by subtracting the predetermined value from the first correction coefficient, The first correction coefficient may be changed to a small value, or may be changed to a value (fixed value) smaller than a predetermined upper limit value.

`` Modification of embodiment ''
In the second embodiment, the first correction coefficient is determined using the first correction coefficient map 61a. The first correction coefficient map 61a has a thermometer attached to the heat receiver 40 as in the third to sixth embodiments, for example, and obtains a first correction coefficient based on the temperature detected by the thermometer. The first correction coefficient and the time when the temperature is detected may be associated and stored in the storage unit 60, and the first correction coefficient map 61a may be sequentially corrected.

  Further, the sixth embodiment is a modification of the fifth embodiment, but as in the third and fourth embodiments, when obtaining the first correction coefficient by calculation, as in the sixth embodiment, When the upper limit value is set and the first correction coefficient is equal to or higher than the upper limit value, the first correction coefficient may be changed to be smaller than the upper limit value.

  DESCRIPTION OF SYMBOLS 10 ... Heliostat, 11 ... Reflector, 20 ... Tower facility, 21 ... Tower, 25 ... Storage, 31 ... Compressor, 32 ... Gas turbine, 33 ... Generator, 40 ... Heat receiver, 41 ... Casing, 45 ... Heat receiving pipe assembly, 47 ... Heat receiving pipe, 50, 50a, 50b, 50c, 50d, 50e ... Heliostat control device, 51 ... Load acquisition unit, 52, 52a, 52b, 52c, 52d, 52e ... Driving heliostat setting unit, 53, 53a, 53b, 53c, 53d, 53e ... Number of operation calculation unit, 54, 54a ... Operation heliostat determination unit, 55 ... Coefficient judgment unit, 56 ... Coefficient change unit, 57 ... Operation instruction unit, 58, 58c, 58d ... Temperature acquisition unit, 60 ... Storage unit

Claims (15)

A heat receiver having a plurality of heat receiving tubes, where sunlight is irradiated to the heat receiving tubes to heat the fluid in the heat receiving tubes, a turbine driven by the fluid heated by the heat receivers, and a reflector A heliostat control device for a solar thermal power generation facility comprising: a plurality of heliostats that reflect sunlight with the reflector and irradiate the heat receiver with sunlight,
In the solar thermal power generation facility, a plurality of the heat receiving tubes are divided into a plurality of regions, and each of the plurality of regions includes a plurality of heliostats capable of irradiating the heat receiving tubes in the regions with sunlight. Heliostat group is supported,
A load acquisition unit for acquiring a load of the turbine;
A driving heliostat setting unit for determining a driving heliostat that is operated among the plurality of heliostats constituting the heliostat group in correspondence with the load of the turbine for each of the plurality of heliostat groups;
Instructing the driving heliostat for each of the plurality of heliostat groups determined by the driving heliostat setting unit, and corresponding to the heliostat group including the driving heliostat by the driving heliostat An operation instructing unit for irradiating the heat receiving pipe in the region with sunlight;
A heliostat control device comprising: The heliostat control device according to claim 1,
The operation heliostat setting unit is an operation number calculation unit that obtains an operation number that is the number of heliostats that operate in the heliostat group corresponding to the load of the turbine for each of the plurality of heliostat groups, A heliostat having a high driving priority predetermined with respect to the plurality of heliostats constituting the heliostat group is preferentially used as the driving heliostat corresponding to the number of operating units set by the operating unit setting unit. A driving heliostat determining unit,
A heliostat control device. The heliostat control device according to claim 2,
The operation priority is determined such that among the plurality of heliostats constituting the heliostat group, a heliostat having a relatively small amount of heat input to the fluid in the heat receiver becomes high.
A heliostat control device. The heliostat control device according to claim 3,
For each of a plurality of heliostats constituting the heliostat group, the amount of heat input to the fluid in the heat receiver by the heliostat is calculated as the amount of heat input to the fluid in the heat receiver by all the heliostats constituting the heliostat group. The value divided by the amount of heat is predetermined as the equivalent number of heliostats,
The driving heliostat determining unit sets a value obtained by summing up the equivalent number of heliostats for the number of operating units in descending order of the driving priority as an equivalent number of operating units, and the heliostat having a higher priority level by the equivalent number of operating units. Is preferentially the driving heliostat,
A heliostat control device. The heliostat control device according to any one of claims 2 to 4,
The operating number calculation unit multiplies the number of the plurality of heliostats constituting the heliostat group by a load of the turbine and a correction coefficient obtained by a predetermined procedure, and the heliostat group Find the number of units in operation
A heliostat control device. The heliostat control device according to claim 5,
A correction coefficient storage unit storing a first correction coefficient at each time for each of the plurality of heliostat groups;
When the number of operating units of the heliostat group is determined, the first number correction unit corresponding to the current time among the first correction coefficients of the heliostat group stored in the correction coefficient storage unit Using a coefficient as at least part of the correction coefficient,
A heliostat control device. The heliostat control device according to claim 5,
The solar thermal power generation facility includes a temperature detection unit that detects an inlet temperature and an outlet temperature of the fluid for each of the plurality of regions of the heat receiver,
The operation number calculation unit obtains the difference between the inlet temperature and the outlet temperature of the heat receiver determined by the inlet temperature and the outlet temperature for each of the plurality of regions when determining the number of the operated heliostats. A value obtained by dividing the difference between the inlet temperature and the outlet temperature in the region corresponding to the stat group is a first correction coefficient, and the first correction coefficient is used as at least a part of the correction coefficient.
A heliostat control device. The heliostat control device according to claim 5,
The solar thermal power generation facility detects a temperature of the inlet of the fluid for each of the plurality of regions of the heat receiver and a temperature of a high-temperature portion that is a temperature of a portion assumed to be the highest temperature for each of the plurality of the regions. With
The operation number calculation unit, when obtaining the number of operation of the heliostat group, an average value of the difference between the inlet temperature and the high temperature part temperature for each of the plurality of regions, the region corresponding to the heliostat group A value obtained by dividing the difference between the inlet temperature and the high temperature temperature in the first correction coefficient, the first correction coefficient is used as at least a part of the correction coefficient,
A heliostat control device. The heliostat control device according to claim 7 or 8,
The driving heliostat setting unit includes a coefficient determination unit that determines whether or not the first correction coefficient is greater than or equal to a predetermined upper limit value, and the first correction coefficient is greater than or equal to the upper limit value in the coefficient determination unit. And a coefficient changing unit that changes the first correction coefficient to less than the upper limit value by a predetermined method when determined to be present,
When the first correction coefficient is changed by the coefficient changing section after the operating number calculation section determines the first correction coefficient, the changed first correction coefficient is set as a part of the correction coefficient. ,
A heliostat control device. The heliostat control device according to any one of claims 5 to 9,
The solar thermal power generation facility has a high temperature part temperature that is a temperature of a part that is assumed to be the highest temperature in the region and a part that is assumed to be the lowest temperature in the region for each of the plurality of regions related to the heat receiving pipe. A temperature detector that detects the temperature of the low temperature part, which is the temperature of
The operation number calculation unit determines a second correction coefficient according to a difference between the high temperature part temperature and the low temperature part temperature in the region corresponding to the heliostat group when obtaining the operation number of the heliostat group. The second correction factor is at least part of the correction factor;
A heliostat control device. The heliostat control device according to any one of claims 1 to 10, the heat receiver, the turbine, and the plurality of heliostats,
A solar thermal power generation facility characterized by comprising: In the solar thermal power generation facility according to claim 11,
At least some of the plurality of heliostats are arranged in a circumferential direction around the heat receiver,
Among the plurality of heliostat groups, at least some of the heliostat groups have different circumferential positions around the heat receiver,
Solar power generation facility characterized by that. In the solar thermal power generation facility according to claim 11 or 12,
At least some of the plurality of heliostats are arranged in a perspective direction with respect to the heat receiver,
Among the plurality of heliostat groups, at least some of the heliostat groups have different positions in the perspective direction with respect to the heat receiver.
Solar power generation facility characterized by that. In the solar thermal power generation facility according to any one of claims 10 to 13,
Among the plurality of heliostat groups, adjacent heliostat groups share a part of the plurality of heliostats constituting each,
Solar power generation facility characterized by that. A heat receiver having a plurality of heat receiving tubes, where sunlight is irradiated to the heat receiving tubes to heat the fluid in the heat receiving tubes, a turbine driven by the fluid heated by the heat receivers, and a reflector A heliostat control method for a solar thermal power generation facility comprising: a plurality of heliostats capable of irradiating sunlight to the heat receiver by reflecting sunlight with the reflector;
In the solar thermal power generation facility, a plurality of the heat receiving tubes are divided into a plurality of regions, and each of the plurality of regions includes a plurality of heliostats capable of irradiating the heat receiving tubes in the regions with sunlight. Heliostat group is supported,
A load acquisition step of acquiring a load of the turbine;
A driving heliostat setting step for determining a driving heliostat that is a heliostat to be driven among the plurality of heliostats constituting the heliostat group corresponding to the load of the turbine for each of the plurality of heliostat groups;
Instructing the driving heliostat for each of the plurality of heliostat groups determined in the driving heliostat setting step, and corresponding to the heliostat group including the driving heliostat by the driving heliostat An operation instruction step of irradiating the heat receiving pipe in the region with sunlight.
A heliostat control method characterized by comprising:

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