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WO2025161071A1 - Appareil et procédé d'étalonnage auxiliaire pour héliostat, et système de production d'énergie photothermique - Google Patents

Appareil et procédé d'étalonnage auxiliaire pour héliostat, et système de production d'énergie photothermique

Info

Publication number
WO2025161071A1
WO2025161071A1 PCT/CN2024/078042 CN2024078042W WO2025161071A1 WO 2025161071 A1 WO2025161071 A1 WO 2025161071A1 CN 2024078042 W CN2024078042 W CN 2024078042W WO 2025161071 A1 WO2025161071 A1 WO 2025161071A1
Authority
WO
WIPO (PCT)
Prior art keywords
heliostat
light spot
spot position
sensing surface
light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2024/078042
Other languages
English (en)
Chinese (zh)
Inventor
罗文哲
张琦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Brigates Microelectronics Inc
Original Assignee
Brigates Microelectronics Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Brigates Microelectronics Inc filed Critical Brigates Microelectronics Inc
Publication of WO2025161071A1 publication Critical patent/WO2025161071A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S20/00—Solar heat collectors specially adapted for particular uses or environments
    • F24S20/20—Solar heat collectors for receiving concentrated solar energy, e.g. receivers for solar power plants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S50/00—Arrangements for controlling solar heat collectors
    • F24S50/20—Arrangements for controlling solar heat collectors for tracking

Definitions

  • the present invention relates to the technical field of solar thermal power generation, and in particular to a heliostat auxiliary calibration device and method, and a solar thermal power generation system.
  • Solar thermal power generation is an important area of renewable energy utilization, primarily encompassing three types of systems: trough, tower, and dish.
  • Tower-type solar thermal power generation systems require higher tracking complexity and precision than trough and dish systems.
  • a heliostat is a component of a tower-type solar thermal power generation system. Its function is to reflect sunlight beams to a fixed position on a receiving tower to generate heat, which is then converted into electricity by the receiving tower.
  • the heliostats must constantly adjust their angles to reflect sunlight onto the tower's receivers. The closer the heliostats' reflected sunlight is to the center of the receiver, the higher the power generation efficiency. Therefore, adjusting the heliostat angle is crucial to tower-type solar thermal power generation systems.
  • the problem to be solved by the present invention is to improve the adjustment accuracy of the heliostat.
  • an embodiment of the present invention provides a heliostat auxiliary calibration device, the heliostat auxiliary calibration device comprising:
  • the calibration body includes a first optical surface and a second optical surface arranged opposite to each other;
  • the detection component is located on the calibration body; the detection component has a first sensing surface facing the first optical surface and a second sensing surface facing the second optical surface; the first sensing surface is parallel to the second sensing surface;
  • the detection assembly is configured to detect a second light spot position of a target point of the receiving tower on the second sensing surface via the second optical surface, and to detect a first light spot position of an image of the sun in the heliostat on the first sensing surface via the first optical surface, so as to adjust the angle of the heliostat based on the second light spot position so that the first light spot position and the second light spot position are symmetrical around the center of the detection assembly.
  • the calibration body includes: a light-shielding surface; the first optical surface and the second optical surface are located on both symmetrical sides of the light-shielding surface and are connected to the light-shielding surface to form a accommodating cavity; the detection component is located in the accommodating cavity.
  • the first optical surface has a first light-transmitting hole; the second optical surface has a second light-transmitting hole.
  • At least one of the first light-transmitting hole and the second light-transmitting hole is located at the center of the optical surface.
  • the first optical surface is provided by a first lens
  • the second optical surface is provided by a second lens
  • the detection component includes: a first detector and a second detector, wherein the first detector is used to detect the image of the sun in the heliostat through the The first optical surface is used to detect a first light spot position on the first sensing surface, and the second detector is used to detect a second light spot position of a receiving tower target on the second sensing surface via the second optical surface.
  • both the first detector and the second detector are image sensors.
  • the first detector and the second detector are arranged back to back.
  • the first sensing surface and the second sensing surface are aligned along a light transmission direction.
  • the heliostat auxiliary calibration device further includes: a control component; wherein:
  • control component is configured to determine whether the first light spot position and the second light spot position are symmetrical about the center of the detection component, and determine an adjustment angle of the heliostat based on the first light spot position and the second light spot position if the first light spot position and the second light spot position are not symmetrical about the center of the detection component;
  • the control component is connected to the heliostat bracket; the heliostat bracket is used to perform an angle adjustment operation on the heliostat under the control of the control component.
  • the heliostat auxiliary calibration device further includes: a calibration body bracket; the calibration body bracket is installed on the heliostat bracket or the mirror surface of the heliostat.
  • control component is also used to determine whether the first sensing surface and the second sensing surface are aligned along the direction of light transmission, and when they are not aligned, determine the angle between the first coordinate system where the first sensing surface is located and the second coordinate system where the second sensing surface is located, and after performing a coordinate system conversion on any one of the first light spot position and the second light spot position based on the angle, determine whether the first light spot position and the second light spot position are symmetrical around the center of the detection component.
  • the calibration body is a cylinder.
  • the receiving tower target point is the center point of the receiver on the receiving tower.
  • An embodiment of the present invention further provides a heliostat auxiliary calibration method, which uses any of the above-mentioned heliostat auxiliary calibration devices to calibrate a heliostat; the method comprises:
  • the heliostat is adjusted, and the first light spot position is re-detected until the second light spot position is symmetrical to the re-obtained first light spot position around the center of the detection assembly.
  • the method before determining whether the first light spot position and the second light spot position are symmetrical around the center of the detection component, the method further includes:
  • the first light spot position and the second light spot position After performing coordinate system conversion on any one of the first light spot position and the second light spot position based on the included angle, it is determined whether the first light spot position and the second light spot position are symmetrical around the center of the detection component.
  • An embodiment of the present invention further provides a solar thermal power generation system, comprising: a heliostat, a receiving tower, and any one of the above heliostat auxiliary calibration devices, wherein the heliostat auxiliary calibration device corresponds one-to-one to the heliostat.
  • a detection assembly can detect the second spot position of the receiving tower target on the second sensing surface via the second optical surface, and can also detect the first spot position of the sun's image in the heliostat on the first sensing surface via the first optical surface. Based on the second spot position, the angle of the heliostat can be adjusted so that the first and second spot positions are symmetrical about the center of the detection assembly. Because the first sensing surface is parallel to the second sensing surface, in actual use, the sunlight reflected by the heliostat can essentially reach the receiving tower target, achieving photothermal conversion.
  • the present invention also provides a solar thermal power generation system, in which a heliostat auxiliary calibration device corresponds one-to-one to a heliostat, so that each heliostat auxiliary calibration device can calibrate a unique heliostat, preventing interference between sunlight reflected by the heliostats, thereby improving the parallelism of calibration.
  • FIG1 is a schematic diagram of placing a camera on a receiving tower to calibrate a heliostat
  • FIG2 is a schematic diagram of a ground-mounted camera for calibrating a heliostat
  • FIG. 3 is a schematic diagram of calibrating a heliostat using a heliostat auxiliary calibration device according to an embodiment of the present invention
  • FIG4 is a schematic diagram of a cross-sectional structure of a heliostat auxiliary calibration device according to an embodiment of the present invention.
  • FIG5 is a schematic diagram of the three-dimensional structure of a heliostat auxiliary calibration device according to an embodiment of the present invention.
  • FIG6 is a schematic diagram of the calibration principle of a heliostat auxiliary calibration device according to an embodiment of the present invention.
  • FIG7 is a schematic structural diagram of a heliostat auxiliary calibration device according to an embodiment of the present invention.
  • FIG8 is a schematic diagram showing the positions of the first sensing surface and the second sensing surface corresponding to the image when the first sensing surface and the second sensing surface are aligned;
  • FIG9 is a schematic diagram showing the positions of corresponding images when the first sensing surface and the second sensing surface are not aligned;
  • FIG10 is a flow chart of a heliostat assisted calibration method according to an embodiment of the present invention.
  • FIG11 is a schematic diagram showing a calibration effect of a heliostat auxiliary calibration device according to an embodiment of the present invention.
  • each heliostat is installed on the Global Positioning System (GPS), and then according to the coordinates and time of the heliostat, the angle that the heliostat should present is calculated through the complete astronomical calendar, so that the sunlight can be reflected to the receiving tower. on the receiver.
  • GPS Global Positioning System
  • the biggest problem with the above solution is its lack of accuracy. Specifically, when a heliostat power plant reaches a certain scale, the distance between the farthest heliostat and the receiving tower can reach over 2 kilometers. A deviation of 0.3 mrad in alignment accuracy will reduce power generation efficiency. This solution is limited by ground flatness, the initial installation angle, equipment aging, and atmospheric refraction of sunlight. It is impossible to achieve exceptionally high accuracy, which severely restricts the scale of ultra-large heliostat power plants and affects power generation efficiency.
  • one or more cameras 13 are placed around a receiver 12 on a receiving tower 11.
  • the cameras 13 are used to continuously detect the reflected light from each heliostat, thereby establishing feedback for adjusting the angle of the heliostat.
  • this solution can achieve high accuracy, because the camera can only detect light from one heliostat at a time, and the light reflected by multiple heliostats may interfere with each other, this solution cannot be used for parallel, real-time adjustments. This results in very low power generation efficiency and cannot be used to build ultra-large power plants.
  • one or more cameras 21 are installed on the ground.
  • the cameras 21 detect the position of the sun's rays 23 reflected by the heliostat 22 falling on the receiving tower 24.
  • a computer 25 is used to establish feedback based on this position to adjust the angle of the heliostat.
  • the receiving tower 24 is provided with a target plate 241 and a receiver 242.
  • the present invention provides a heliostat-assisted calibration device.
  • Using this heliostat-assisted calibration device to calibrate a heliostat only requires ensuring that the positions of the first and second light spots are symmetrical around the center of the detection assembly. This device reduces the number of factors influencing calibration and enables ultra-high-precision calibration, thereby improving the power generation efficiency of the power station.
  • an embodiment of the present invention provides a heliostat auxiliary calibration device, which may include: a calibration body 30 and a detection component.
  • the calibration body 30 includes a first optical surface 34 and a second optical surface 35 disposed opposite to each other.
  • the detection component is located on the calibration body 30; the detection component has a first sensing surface 301 facing the first optical surface 34 and a second sensing surface 302 facing the second optical surface 35; the first sensing surface 301 is parallel to the second sensing surface 302;
  • the detection assembly is configured to detect a second light spot position of the target point A of the receiving tower 50 on the second sensing surface 302 via the second optical surface 35, and to detect a first light spot position of the image of the sun 40 in the heliostat 60 on the first sensing surface 301 via the first optical surface 34, so as to adjust the angle of the heliostat 60 based on the second light spot position so that the first and second light spot positions are symmetrical around the center of the detection assembly.
  • the sunlight reflected by the heliostat 60 can be parallel to the light that passes through the target point on the receiving tower 50 and reaches the second sensing surface 302.
  • the incident position of the sunlight reflected by the heliostat 60 on the receiving tower 50 is close to or coincides with the position of the target point on the receiving tower 50, so that the sunlight reflected by the heliostat 60 can be reflected onto the receiving tower 50, achieving light-to-heat conversion.
  • the first spot position of the sun's image in the heliostat on the first sensing surface via the first optical surface is detected, and on the other hand, the second spot position of the receiving tower target on the second sensing surface via the second optical surface is detected.
  • the sunlight reflected by the heliostat is parallel to the light that passes through the receiving tower target 50 and reaches the second sensing surface 302. This allows for high calibration accuracy, thereby enabling To improve power generation efficiency.
  • the receiving tower 50 is provided with a receiver 51 for receiving reflected sunlight during the actual photothermal conversion process.
  • the receiving tower 50 may also be provided with a target plate 52 for calibrating the heliostat.
  • the target plate 52 may be provided with multiple target points, and any one of these target points may be selected as the target point for calibrating the heliostat.
  • the target plate 52 and receiver 51 can be located in different areas of the receiving tower 50, and the corresponding receiving tower areas can partially overlap. In some embodiments, the receiving tower areas corresponding to the target plate 52 and receiver 51 can completely overlap, so that the target point for calibrating the heliostat coincides with a point on the receiver 51. In this case, the heliostat is calibrated directly using a point on the receiver 51.
  • the receiving tower target point can be set to the center of the receiver 51 on the receiving tower. This allows the calibrated heliostat to direct the sun's reflected light to or around the center of the receiver 51. The closer the sun's reflected light is to the center of the receiver, the higher the power generation efficiency.
  • the detection component can be implemented in a variety of ways, which are not limited here.
  • the detection assembly includes a first detector 31 and a second detector 32.
  • the first detector 31 is used to detect the position of a first spot of the sun's image in the heliostat on the first sensing surface 301 via the first optical surface 34
  • the second detector 32 is used to detect the position of a second spot of the receiving tower target point A on the second sensing surface 302 via the second optical surface 35.
  • At least one of the first detector 31 and the second detector 32 can be implemented as a sensor.
  • the first detector 31 can be implemented as a sensor
  • the second detector 32 can be implemented as another detection device or circuit.
  • both the first detector 31 and the second detector 32 can be implemented as sensors.
  • the first detector 31 and the second detector 32 can be implemented by sensors, or by different sensors. There are many types of sensors that can be used for detection, which are not limited here.
  • an image sensor can be used as the sensor for detection.
  • image sensors such as contact image sensors (CIS image sensors).
  • CIS image sensors contact image sensors
  • the first position of the sun relative to the first sensing surface 301 can be determined by detecting the spot position of the sun's image on the first sensing surface 301.
  • the second position of the receiving tower target relative to the second sensing surface can be determined by detecting the spot position of the receiving tower target on the second sensing surface 302. Subsequently, based on the spot position of the sun on the first sensing surface 301, it can be determined whether the sunlight L1 reflected by the heliostat is perpendicular to the first sensing surface 301. Based on the spot position of the receiving tower target on the second sensing surface 302, it can be determined whether the line connecting the receiving tower target and a specified point on the second sensing surface 302 is perpendicular to the second sensing surface 302.
  • a light source can be provided at the target point of the receiving tower.
  • the second light spot position of the tower target point on the second sensing surface is symmetrical with the first light spot position of the sun's image on the first sensing surface about the center of the detection assembly, the light generated by the light source at the target point of the receiving tower is parallel to the sunlight reflected by the heliostat.
  • the incident position of the sunlight reflected by the heliostat on the receiving tower is close to or coincides with the position of the target point on the receiving tower.
  • the sunlight reflected by the heliostat can illuminate the vicinity of or the target point of the receiving tower.
  • the first detector 31 and the second detector 32 may be disposed back to back, thereby making it easier for the first sensing surface 301 to face the heliostat, the second sensing surface 302 to face the receiving tower, and the first sensing surface 301 to be parallel to the second sensing surface 302 .
  • the first detector 31 and the second detector 32 may also be There is a certain gap, and the specific size of the gap can be set according to actual conditions, such as the thickness of the chip package, the thickness of the chip placement chip, and the thickness of the PCB board of the first detector 31 and the second detector 32. Other components may also be placed between the first detector 31 and the second detector 32.
  • the center of the detection assembly can be the center position of the detection assembly along the light transmission direction.
  • the center of the detection assembly is the center position of the first detector 31 and the second detector 32 as a whole in the light transmission direction.
  • the first optical surface 34 and the second optical surface 35 can be glass cover plates made of a light-shielding material.
  • Each of the first and second optical surfaces 34 and 35 has a specific field of view.
  • the position of the receiving tower target can be observed within the field of view. Adjusting the heliostat also allows for observation of the solar image.
  • the first optical surface 34 can be provided by a first lens
  • the second optical surface 35 can be provided by a second lens.
  • the first optical surface 34 can be directly mounted on the first detector 31
  • the second optical surface 35 can be directly mounted on the second detector 32
  • the first detector 31 and the second detector 32 can be connected back to back.
  • the calibration body 30 may further include a light shielding surface 33.
  • the first optical surface 34 and the second optical surface 35 are located on either side of the light shielding surface 33 and connected to the light shielding surface 33 to form a receiving cavity; the detection component is located in the receiving cavity.
  • the light-shielding surface 33 can be made of a light-shielding material.
  • the light-shielding surface 33, the first optical surface 34, and the second optical surface 35 together form a closed housing cavity.
  • the first detector 31 and the second detector 32 are fixed within this housing cavity. This allows the housing cavity to be aligned with the receiving tower target, so that the tower target forms a light spot on the second sensing surface 302. Subsequent adjustment of the heliostat can ensure that the image of the sun forms a light spot on the first sensing surface 301.
  • the calibration body 30 can have a variety of shapes, for example, 3 , the calibration body 30 may be a cylinder.
  • the first optical surface 34 and the second optical surface 35 are equivalent to the upper and lower surfaces of the cylinder, and the light shielding surface 33 is equivalent to the cylindrical surface of the cylinder.
  • the calibration body may also be in other shapes having a first optical surface and a second optical surface, such as a cuboid, a cube, etc., which is not limited here.
  • the first optical surface may have a first light-transmitting hole
  • the second optical surface may have a second light-transmitting hole.
  • the positions of the first light-transmitting hole and the second light-transmitting hole on the optical surface are not limited, as long as the first light spot position of the sun's image on the first sensing surface and the second light spot position of the receiving tower target on the second sensing surface are symmetrical around the center of the detection component.
  • At least one of the first light-transmitting hole and the second light-transmitting hole may be located at the center of the optical surface on which they are located.
  • the first light-transmitting hole may be located at the center of the first optical surface
  • the second light-transmitting hole may be located at the center of the second optical surface.
  • the sun's image D2 is irradiated onto the first sensing surface 301 through the first light-transmitting hole B, resulting in a first light spot position D2'.
  • the tower target point A2 is irradiated onto the first sensing surface 302 through the second light-transmitting hole C, resulting in a second light spot position A2'.
  • the first light spot position D2' and the second light spot position A2' are symmetrical around the detection assembly center O.
  • the sun's image D1 passes through the first light-transmitting aperture B, forming a first light spot position D1' on the first sensing surface 301.
  • the tower target point A1 passes through the second light-transmitting aperture C, forming a second light spot position A1' on the first sensing surface 302.
  • the first and second light spot positions D1' and A1' are symmetrical around the detection assembly center O. In this case, in practical applications, the actual illumination position of the sun's image D1 coincides with the tower target point A1, achieving the highest calibration accuracy.
  • the first optical surface 34 and the first detector 31 can constitute a first camera module
  • the second optical surface 35 and the second detector 32 can constitute a second camera module.
  • the first camera module and the second camera module are two back-to-back camera modules.
  • the two camera modules can be coaxially fixed in the accommodating cavity.
  • the rotation angle of the heliostat can be manually adjusted so that the second light spot position is symmetrical to the first light spot position around the center of the detection assembly.
  • the heliostat auxiliary calibration device may further include: a control component 36 .
  • the control component 36 is configured to determine whether the first light spot position and the second light spot position are symmetrical about the center of the detection component, and to determine an adjustment angle of the heliostat based on the first light spot position and the second light spot position if the first light spot position and the second light spot position are not symmetrical about the center of the detection component.
  • the control component 36 is in communication with the heliostat support 601 ; the heliostat support 601 is configured to perform an angle adjustment operation on the heliostat 60 under the control of the control component 36 .
  • the heliostat support 601 may include a drive component and a rotating shaft.
  • the drive component may receive control signals from the control assembly 36 and thereby drive the rotating shaft to rotate horizontally or vertically, thereby adjusting the angle of the calibration body or the heliostat.
  • the drive component may be a stepper motor or other drive components, without limitation.
  • the heliostat auxiliary calibration device may further include a calibration body bracket 37.
  • This calibration body bracket 37 may be implemented using a structure that does not allow for angle adjustment of the calibration body. In this case, only the heliostat angle can be automatically adjusted during the entire calibration process.
  • the calibration body bracket 371 can be independently installed on the ground, or can be installed on the support shaft of the heliostat or on the mirror surface of the heliostat, which is not limited here.
  • control assembly 36 is integrated into the accommodating cavity, or integrated into the calibration body bracket 371 , and is interconnected with the calibration body bracket 371 and the heliostat bracket 372 via signal lines.
  • the first camera module and the second camera module can be configured to have the same specifications and be placed back-to-back.
  • This dual camera module with the same specifications and placed back-to-back is called a dual mirror.
  • the first sensing surface 301 and the second sensing surface 302 can be aligned along the light transmission direction X. That is, the first sensing surface 301 and the second sensing surface 302 are centrally aligned, their surfaces are parallel, and their formats overlap along the light transmission direction X. In this case, referring to FIG8 , the image P1 obtained based on the first sensing surface 301 and the image P2 obtained based on the second sensing surface 302 completely overlap along the light transmission direction X.
  • the first sensing surface 301 and the second sensing surface 302 cannot be completely aligned along the light transmission direction X.
  • the image P1 obtained based on the first sensing surface 301 and the image P2 obtained based on the second sensing surface 302 cannot completely overlap along the light transmission direction X.
  • control component can also be used to determine whether the first sensing surface and the second sensing surface are aligned along the light transmission direction, and when they are not aligned, determine the angle between the first coordinate system where the first sensing surface is located and the second coordinate system where the second sensing surface is located, and perform coordinate system conversion on any one of the first light spot position and the second light spot position based on the angle, and then determine the first light spot position. and whether the position of the second light spot is symmetrical around the center of the detection component.
  • the first detector and the second detector can be used to respectively capture two images of the same scene as test pattern images to obtain the coordinate system data of the two test images.
  • the coordinate system data corresponding to the test image P1 obtained based on the first sensing surface 301 is P1'
  • the coordinate system data corresponding to the test image P2 obtained based on the second sensing surface 302 is P2'. If the coordinate axis positions of the two coordinate system data P1' and P2' do not completely overlap, the inventory can determine that the first sensing surface and the second sensing surface are not aligned along the direction of light transmission. At this time, the control component can calculate the angle between the two coordinate systems and store it.
  • the coordinate system of the second light spot position can be transformed based on the coordinate system angle to obtain the position coordinates of the second light spot position in the coordinate system where the first light spot position is located, thereby determining whether the second light spot position and the first light spot position are symmetrical around the center of the detection component after the coordinate transformation.
  • control component can also perform a coordinate system conversion on the first light spot position based on the coordinate system angle after obtaining the first light spot position, and obtain the position coordinates of the first light spot position in the coordinate system where the second light spot position is located, thereby determining whether the first light spot position and the second light spot position are symmetrical around the center of the detection component after the coordinate conversion.
  • the heliostat auxiliary calibration device in the embodiment of the present invention can not only improve the adjustment accuracy of the heliostat (the adjustment accuracy can be achieved within 0.1° according to the optical solution), but also can calibrate the heliostat in the second phase. Moreover, during the calibration process, there is no need to rotate the heliostat auxiliary calibration device, only the heliostat needs to be rotated.
  • the entire heliostat auxiliary calibration device does not require particularly high precision during the production and installation process.
  • an image sensor When using an image sensor as a detection component, it can be in an online calibration state around the clock, improving the real-time performance of the calibration.
  • an embodiment of the present invention further provides a heliostat auxiliary calibration method, wherein a heliostat is calibrated using any of the heliostat auxiliary calibration devices described in the above embodiments.
  • the method may include the following steps:
  • Step 110 adjusting the position of the detection component so that the receiving tower target is located within the sensing range of the second sensing surface, and obtaining a second light spot position of the receiving tower target on the second sensing surface via the second optical surface.
  • Step 120 Adjust the heliostat so that the image of the sun in the heliostat is located within the sensing range of the first sensing surface, and obtain a first spot position of the image of the sun in the heliostat on the first sensing surface through the first optical surface.
  • Step 130 Determine whether the first light spot position and the second light spot position are symmetrical around the center of the detection component.
  • step 140 is executed.
  • Step 140 Determine an adjustment angle of the heliostat based on the first light spot position and the second light spot position.
  • step 120 may be executed again until the second light spot position and the newly obtained first light spot position are symmetrical around the center of the detection assembly.
  • the method may further include:
  • step 140 Determine whether the first sensing surface and the second sensing surface are aligned along the light transmission direction.
  • the angle between the first coordinate system where the first sensing surface is located and the second coordinate system where the second sensing surface is located can be determined first.
  • the coordinate system of any one of the first light spot position and the second light spot position can be determined based on the angle.
  • the control assembly can first determine whether the first sensing surface 301 and the second sensing surface 302 are aligned. If they are not aligned, the angle between the first coordinate system of the first sensing surface and the second coordinate system of the second sensing surface can be calculated. If they are aligned, there is no need to calculate the angle between the first coordinate system of the first sensing surface and the second coordinate system of the second sensing surface.
  • the first detector 31 can send the collected image data about the second light spot position to the control component 36. Based on the second light spot position, the control component 36 can adjust the rotation axis of the heliostat so that the image of the sun at the first light spot position and the second light spot position in the second detector are centrally symmetrical around the center point of the sensor.
  • receiving tower target point A1 corresponds to sun image D1
  • receiving tower target point A2 corresponds to sun image D2.
  • Receiving tower target point A1 is completely perpendicular to first sensing surface 301, and the light emitted by sun image D1 is completely perpendicular to second sensing surface 302. This is a special case of three points coinciding. In this case, the sun can perfectly illuminate receiving tower target point A1.
  • the image data sent by the first detector 31 to the control component 36 displays the second imaging position corresponding to the second light spot position.
  • the image data sent by the second detector 32 to the control component 36 displays the first imaging position corresponding to the first light spot position.
  • the light is not perpendicular to the surface.
  • the direction of the light of the receiving tower target point A2 after the heliostat is adjusted, the direction of the light of the sun's image D2 is perpendicular to the receiving tower target point A2.
  • the direction of the light from point A2 is parallel. Therefore, the positional offset between the actual irradiation position A3 of the sun's image D2 and the target point A2 of the receiving tower can be ignored. This completes the real-time calibration of the heliostat, allowing the sun to illuminate the target area of the receiving tower.
  • control assembly 36 can send an angle adjustment signal to the heliostat mount to fine-tune its angle. Ultimately, feedback control is used to bring the direction of the sun's image D2 parallel to the direction of the light from the receiving tower target A2.
  • the final state after adjustment is completed may be shown in FIG11 .
  • the image D of the sun directly shines on the receiver 51 .
  • the final result after calibration is that the sun directly shines on the receiver 51 .
  • An embodiment of the present invention further provides a solar thermal power generation system.
  • the system may include:
  • Heliostat 40, receiving tower 50 and heliostat auxiliary calibration device wherein the heliostat auxiliary calibration device corresponds to the heliostat one by one.
  • a heliostat auxiliary calibration device is provided corresponding to each heliostat one by one, so that each heliostat auxiliary calibration device can calibrate a unique heliostat, preventing interference between sunlight reflected by the heliostats, thereby improving calibration parallelism.

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  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

L'invention concerne un appareil et un procédé d'étalonnage auxiliaire pour un héliostat, et un système de production d'énergie photothermique. L'appareil d'étalonnage auxiliaire pour un héliostat comprend un corps d'étalonnage et un ensemble de détection. Le corps d'étalonnage comprend une première surface optique et une deuxième surface optique qui sont disposées de manière opposée. L'ensemble de détection est pourvu d'une première surface de détection et d'une deuxième surface de détection, la première surface de détection étant parallèle à la deuxième surface de détection. L'ensemble de détection est utilisé pour détecter une deuxième position de point lumineux d'un point cible d'une tour de réception sur la deuxième surface de détection après le passage à travers la deuxième surface optique, et détecter une première position de point lumineux de l'image du soleil dans un héliostat sur la première surface de détection après le passage à travers la première surface optique, de façon à régler l'angle de l'héliostat sur la base de la deuxième position de point lumineux, de sorte que la première position de point lumineux et la deuxième position de point lumineux sont symétriques autour du centre de l'ensemble de détection. En utilisant la solution décrite, la précision de réglage de l'héliostat peut être améliorée.
PCT/CN2024/078042 2024-01-29 2024-02-22 Appareil et procédé d'étalonnage auxiliaire pour héliostat, et système de production d'énergie photothermique Pending WO2025161071A1 (fr)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008035842A1 (de) * 2008-08-03 2010-02-04 Robert Frase Modulares Turmkraftwerk zur Umwandlung von solarer Energie in andere Energieformen
US20100031952A1 (en) * 2008-08-06 2010-02-11 Maximilian Zavodny Camera-based heliostat calibration with artificial light sources
CN102354226A (zh) * 2011-09-29 2012-02-15 深圳市联讯创新工场科技开发有限公司 太阳能发电站的定日镜校准系统及校准方法
CN103309361A (zh) * 2013-06-03 2013-09-18 梁方民 一种定日镜的跟踪瞄准控制方法及其装置
CN105022410A (zh) * 2015-05-07 2015-11-04 浙江中控太阳能技术有限公司 一种塔式太阳能发电系统定日镜校准系统及校准方法
CN109557947A (zh) * 2018-12-21 2019-04-02 中国计量大学 一种塔式定日镜的双闭环跟踪控制方法
CN110987376A (zh) * 2019-12-12 2020-04-10 何开浩 用于检测塔式太阳能发电系统聚焦是否准确的装置及方法
CN116301064A (zh) * 2023-01-19 2023-06-23 浙江可胜技术股份有限公司 一种定日镜校正系统和方法及其在镜场中的应用

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008035842A1 (de) * 2008-08-03 2010-02-04 Robert Frase Modulares Turmkraftwerk zur Umwandlung von solarer Energie in andere Energieformen
US20100031952A1 (en) * 2008-08-06 2010-02-11 Maximilian Zavodny Camera-based heliostat calibration with artificial light sources
CN102354226A (zh) * 2011-09-29 2012-02-15 深圳市联讯创新工场科技开发有限公司 太阳能发电站的定日镜校准系统及校准方法
CN103309361A (zh) * 2013-06-03 2013-09-18 梁方民 一种定日镜的跟踪瞄准控制方法及其装置
CN105022410A (zh) * 2015-05-07 2015-11-04 浙江中控太阳能技术有限公司 一种塔式太阳能发电系统定日镜校准系统及校准方法
CN109557947A (zh) * 2018-12-21 2019-04-02 中国计量大学 一种塔式定日镜的双闭环跟踪控制方法
CN110987376A (zh) * 2019-12-12 2020-04-10 何开浩 用于检测塔式太阳能发电系统聚焦是否准确的装置及方法
CN116301064A (zh) * 2023-01-19 2023-06-23 浙江可胜技术股份有限公司 一种定日镜校正系统和方法及其在镜场中的应用

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