WO2013056507A1 - Procédé de détection d'écart angulaire d'héliostat pour centrale thermodynamique à tour solaire - Google Patents

Procédé de détection d'écart angulaire d'héliostat pour centrale thermodynamique à tour solaire Download PDF

Info

Publication number
WO2013056507A1
WO2013056507A1 PCT/CN2012/001049 CN2012001049W WO2013056507A1 WO 2013056507 A1 WO2013056507 A1 WO 2013056507A1 CN 2012001049 W CN2012001049 W CN 2012001049W WO 2013056507 A1 WO2013056507 A1 WO 2013056507A1
Authority
WO
WIPO (PCT)
Prior art keywords
heliostat
mirror
center
image
lens
Prior art date
Application number
PCT/CN2012/001049
Other languages
English (en)
Chinese (zh)
Inventor
邵文远
Original Assignee
Shao Wenyuan
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 Shao Wenyuan filed Critical Shao Wenyuan
Publication of WO2013056507A1 publication Critical patent/WO2013056507A1/fr

Links

Classifications

    • 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
    • F24S23/77—Arrangements for concentrating solar-rays for solar heat collectors with reflectors with flat reflective plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S30/00—Arrangements for moving or orienting solar heat collector modules
    • F24S30/40—Arrangements for moving or orienting solar heat collector modules for rotary movement
    • F24S30/45—Arrangements for moving or orienting solar heat collector modules for rotary movement with two rotation axes
    • F24S30/452—Vertical primary axis
    • 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
    • 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
    • F24S2050/25—Calibration means; Methods for initial positioning of solar concentrators or solar receivers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers
    • Y02E10/47—Mountings or tracking

Definitions

  • the present invention relates to a solar thermal power generation system, and more particularly to a heliostat angular deviation detection method for a tower solar thermal power generation system.
  • solar thermal power generation mainly includes two types of trough type and tower type, and the trough type structure is relatively simple, but the temperature of the heat absorber can generally only reach 200 ° C or more, and the power generation efficiency is low.
  • the tower structure is relatively complicated, but the temperature of the heat absorber can generally reach 500 ° C or more, and the power generation efficiency is high.
  • the principle of tower solar thermal power generation technology is to use a heliostat to reflect sunlight to a heat sink located on a high tower to realize large-capacity power generation.
  • the power station system includes a heliostat field, a heat sink, a heat storage device, and a power generating device.
  • every heliostat in the heliostat field must also move from east to west, and from bottom to top, and then from top to bottom, to ensure that the reflection of sunlight on each side of the heliostat is concentrated.
  • On the tower's heat sink According to the relative position, time, location, etc. of each heliostat and heat sink, the azimuth and elevation angle of each heliostat at any time can be calculated, but due to atmospheric refraction, mechanical error, thermal expansion and contraction, Materials such as aging will cause deviations in reflection and affect power generation efficiency.
  • Design the fixed angle field deviation measurement and correction system which can be used as the negative feedback parameter of the control system. Adjust the azimuth and elevation angle of each surface heliostat in time, so that the reflection of sunlight from the heliostat is always aligned with the heat absorber. Power generation efficiency.
  • the object of the present invention is to overcome the above-mentioned deficiencies of the prior art, and provide a detection method for forming a corresponding spot by automatically correcting whether each heliostat in the mirror field can reflect sunlight to the heat absorber without manual intervention.
  • the plan is as follows:
  • the tower solar thermal power generation system includes a heat absorber fixed to the tower and a plurality of surface fixed mirrors rotatable at corresponding fixed positions
  • the plurality of surface heliostats are arranged in a set manner to form a mirror field, and each of the heliostats reflects sunlight to the heat absorber at the correct position
  • the tower solar thermal power generation system is Providing a first imaging unit, the first imaging unit comprising a first lens E and a camera or camera connected to the first lens and a computer connected to the camera or the camera, the first lens being disposed on the heat sink
  • the central region is at a constant value L k from the center of the mirror surface of the k-th surface of the mirror field to form a first center line EQ k .
  • the axis of the heliostat rotating in the horizontal plane and the vertical plane passes through the mirror center Qk, and the mirror width of the mirror center Qk is D k and the height is H k , and the first imaging unit can photograph the corresponding heat sink
  • the corresponding image of the entire mirror field, through which the steps of determining the mirror position of the heliostat are correct are as follows:
  • the first imaging unit When the tower solar thermal power generation system is in operation, the first imaging unit performs a shooting on the corresponding mirror field at each set time interval to form a current image of the mirror field, and the computer finds each side of the current image.
  • the angle formed by the angle of a central connection EQ on the horizontal plane is ⁇ and the elevation angle of the vertical plane is ⁇
  • the center of the solar virtual image of the k-th surface heliostat is (V, to the second center line E8 of the lens E) k 'and the line connecting the centers of the first k EQ k 9 k formed azimuth and elevation (I);
  • the mirror angle of the fixed heliostat is correct, and no adjustment is needed. If the setting range is exceeded, the mirror angle of the corresponding heliostat is incorrect and needs to be adjusted.
  • the tower solar thermal power generation system includes a heat absorber fixed to the tower and a plurality of surface fixed mirrors that can rotate at corresponding fixed positions.
  • the plurality of heliostats are arranged in a set manner to form a heliostat field, and each of the heliostats reflects sunlight to the heat absorber at the correct position, wherein the tower solar thermal power generation a first imaging unit and a second imaging unit are disposed in the system, the first imaging unit including a first lens and a camera or camera connected to the first lens and a computer connected to the camera or the camera; the second imaging The unit includes a plurality of second lenses, a number of cameras or cameras coupled to the corresponding second lens, and a computer coupled to the camera or camera.
  • the first lens is disposed in the central region of the heat sink, and the distance from the center of the k-th heliostat in the mirror field is a constant value L k , and the center line 6 is formed (3 ⁇ 4 and heliostat)
  • the angle of the plane, the angle is decomposed into the azimuth angle on the horizontal plane is e k and the elevation angle on the vertical plane is (b k , the axis of the heliostat rotating in the horizontal plane and the vertical plane passes through the mirror center Q k
  • the first imaging unit can capture an image of the entire mirror field; the plurality of second lenses are disposed on the periphery of the heat absorber, and the distance between the adjacent two second lenses is smaller than the width or height of the minimum reflected spot.
  • the steps of determining whether the mirror position of the heliostat is correct by the images taken by the first and second imaging units are as follows:
  • the second imaging unit When the tower solar thermal power generation system is in operation, the second imaging unit performs a shooting on the mirror field at each set time interval to form a current image of the mirror field, and the computer searches for each side of the image. Whether there is a sun image in the heliostat;
  • the center of the solar virtual image of the k- th surface heliostat is Q k ', and the second center line EQ k of the lens E forms an azimuth angle of 6 k and an elevation angle (i) k with the first center line EQk.
  • the k-th surface heliostat has a horizontal rotation angle ⁇ 1 ⁇ and a vertical rotation angle ⁇ k after the mirror surface
  • the center Qk' of the image coincides with the center Q k of the mirror
  • the pitch of the center of the heliostat Q k before the rotation to the center of the virtual image Qk' in the horizontal direction is n Dk pixels
  • the pitch in the vertical direction is ⁇
  • a further design of the heliostat angle deviation detecting method of the tower solar thermal power generation system is that the first lens is disposed at a fixed position in a central region of the heat absorber or U cells disposed in a central region of the heat absorber In the positioning position, the mirror field is divided into corresponding U regions, so that the first lens has a mirror field corresponding to each of the positioning positions.
  • the heliostat angle deviation detecting method of the tower solar thermal power generation system is further designed such that the heliostat is a plane mirror or a parabolic mirror.
  • the first imaging unit in the above-described tower solar thermal power generation system can be moved, and the correction method of the movement error is that at least three are not in a straight line at the position of the amorphous heliostat in the mirror field.
  • a controllable laser emitter or a high-intensity illumination device the range of the light beam emitted by the laser emitter or the high-intensity illumination device covering the first imaging unit and the second imaging unit, and the controllable laser emitter or high-brightness illumination
  • the illumination frequency of the device corresponds to the time interval, and the steps of correcting the movement error of the first imaging unit are as follows:
  • a mirror correction image including a controllable laser emitter or a high-intensity illumination device is captured by the first imaging unit and the second imaging unit, and the pixel coordinate value of the controllable laser emitter or the high-intensity illumination device is determined by the correction image, The pixel coordinate value is used as a reference to establish a standard coordinate system, and the reference pixel coordinates corresponding to the standard coordinate system of each certain ⁇ mirror in the mirror field are determined;
  • the current pixel coordinates of the heliostat are compared with the corresponding reference pixel coordinates. If the two-pixel coordinate error is within the set range, the corresponding heliostat does not need to be adjusted. If the setting range is exceeded, the corresponding heliostat needs to be adjusted.
  • the invention provides an imaging unit mainly composed of a lens, a camera or a camera and a computer in a solar thermal power generation system, and analyzes and calculates the image according to an image taken by a lens, a camera or a camera, and determines a position of the sun virtual image from the solar thermal power generation system.
  • the lens is placed in a central region of the heat absorber, and the lens has a suitable wide angle to image the entire mirror field, thus constituting the first technical solution of the present invention; In the lens of the center area, several lenses are placed around the heat absorber.
  • the first lens located in the central area of the heat sink is generally used to adjust the initial position of the heliostat in the mirror field; the second lens located around the heat absorber is generally used for the position of the heliostat when the solar thermal power system is working.
  • the monitoring thus constitutes the second technical solution of the present invention.
  • the first technical solution is a basic application solution; the second technical solution is an extended application solution.
  • the horizontal axes of the horizontal and vertical planes pass through the mirror center Q.
  • the heliostat M can bypass the Z axis of the mirror center point Q as a horizontal plane (QXQY plane in the figure).
  • the rotation can also bypass the BB axis of the mirror center point Q (when the heliostat rotates around the Z axis to a certain angle, and the BB axis is parallel to the X axis) to make a vertical plane (QYQZ plane in the figure). Therefore, no matter how the heliostat rotates its mirror center Q, the distance L between the lens and the mirror center Q is constant.
  • the rotation of the heliostat mirror as it moves with the sun is produced by rotation in both horizontal and vertical directions.
  • the angle between the line EQ of the first lens E and the center Q of the heliostat mirror Q and the line EQ' of the virtual image Q' of the sun is decomposed into an azimuth angle ⁇ in the horizontal direction and an elevation angle ⁇ in the vertical direction.
  • SS 2 is the two positions in the sun movement, moving from 8 1 to S 2 .
  • S 2 ' is the virtual image of Si
  • M' is the extension of heliostat
  • A is the corresponding imaging of the sun in the heliostat at 8 1 and S 2 positions. The intersection of the position and the mirror.
  • the first lens E and the heliostat M do not move, the sun moves from the time to the S 2 : the first lens E observes that the virtual image of the sun moves from the movement to the S 2 ', which is reflected on the heliostat from the movement of the ⁇ to the A 2 , its length is d.
  • the distance between the first lens E and the mirror center Q of the k-th surface heliostat M is L k
  • the angle between the EQ and the horizontal direction of the mirror surface is ⁇
  • the distances from the lens ⁇ to ⁇ , and the ⁇ 2 are substantially the same (the The difference is negligible), basically equivalent to L
  • the arc length corresponding to the azimuth angle is basically equal to the corresponding chord length
  • the heliostat and ⁇ 2 are set at both ends of the width of the heliostat (the width D of the heliostat is the length of the mirror side perpendicular to the axis of rotation of the heliostat), the heliostat can be passed through the imaging unit. Seeing the azimuth of the sun's maximum change, 0 max, there are:
  • the imaging unit can see the virtual image of the sun through the heliostat, and can accurately determine the amount of change in the azimuth.
  • E is the lens of the imaging unit
  • M 1 is the initial position of the heliostat (still assumed to be the plane mirror)
  • M 2 is The heliostat rotates at a position where P is the center of rotation
  • SS 2 is the parallel light when the sun does not move but is imaged on E by heliostat movement.
  • S, , and S 2 ' are S 2 in the day Mirror] ⁇ 1 and ] ⁇ 2 position of the virtual image
  • Acute ⁇ 2 is the position of the corresponding virtual image formed on the mirror surface of the sun at the position of S 2 .
  • the imaging unit is rotated when the heliostat rotation angle is P while the imaging unit imaging unit and the sun are stationary (instantaneous) and the heliostat is rotated.
  • the heliostat rotates correspondingly ⁇ /2, which ensures that the mirror of the fixed ⁇ mirror faces the suction
  • the heliostat can reflect the sun's rays, on the heat sink A corresponding spot is formed.
  • ⁇ D Xn D / N D / L (8)
  • D, N D , L are constants
  • n D is the number of horizontal pixels from the center of the virtual image of the sun to the center of the heliostat, which can be accurately determined by the above formula Calculate the deviation angle in the horizontal direction.
  • ⁇ H Xn H / N H / L (9)
  • H, N H , L are constants
  • ii H is the number of vertical pixels from the center of the virtual image of the sun to the center of the heliostat.
  • the light must not reflect the sunlight onto the first lens, and there is no reflection of sunlight onto the heat sink. If the solar virtual image in the corresponding heliostat is not observed from the second lens placed around the periphery of the heat absorber, the heliostat must reflect the sunlight onto the first lens, and the reflected sunlight of the surface of the heliostat just deviates. With the heat sink, the corresponding second lens can observe the virtual image of the sun. At this time, the computer can determine which side of the heliostat is deviated, the direction of deviation, the angle, etc., and can notify the transmission mechanism to correct. Since the second lens is mounted on the periphery of the heat absorber, it does not affect the heat absorption of the heat sink, and the temperature around the heat absorber is lower than the center, and the cooling system and life are better guaranteed.
  • the first imaging unit provided by the present invention can obtain the following beneficial effects: as long as the azimuth and elevation angles are within a certain error range, the analysis of the imaging in the first lens can be automatically corrected; in engineering techniques and processes When allowed, all the heliostats in the mirror field can be corrected at the same time, and the degree of automation is high, which improves the accuracy of the hemispherical deviation angle detection and the efficiency of the detection work.
  • deviations caused by lens movement can be eliminated by a controllable laser emitter or a high-intensity illumination device. Setting the second imaging unit can reduce the use of the first imaging unit, increase the efficiency of receiving light, and increase the range in which the deflection angle is detected.
  • Figure 1 is a schematic diagram of the projection of the angle between the first lens and the center of the heliostat and the center of the solar virtual image on the horizontal and vertical coordinate planes.
  • Figure 2 is a schematic diagram of the imaging principle when the sun moves the heliostat without rotation.
  • Figure 3 is a schematic diagram of the imaging principle when the sun does not move the heliostat.
  • FIG. 4 is a schematic view showing the principle of imaging of a solar virtual image position in the center position of the heliostat in FIG.
  • Fig. 5 is a schematic view showing the structure of an embodiment of the first imaging unit of the present invention.
  • Fig. 6 is a structural schematic view showing a position where a first lens or a plurality of first lenses are rotatable.
  • Fig. 7 is an image of a mirror field taken as indicated by the reference coordinates of the first imaging unit establishing the heliostat pixels.
  • Figure 8 is a schematic diagram of an image taken by the first imaging unit when all of the heliostats in the mirror field are in the correct position.
  • Fig. 9 is a view showing a case where the heliostat mirror is in an incorrect position in the image taken by the first imaging unit.
  • Fig. 10 is a view showing an image taken corresponding to the second imaging of the mirror field condition shown in Fig. 8.
  • Figure 11 is a schematic view showing the structure of an embodiment of the present invention having both the first and second image forming units.
  • the tower solar thermal power generation system includes a tower 1 ⁇ a heat sink H and a heliostat ⁇ .
  • the first imaging unit E is fixed on the central region of the heat sink H on the tower T, and a plurality of surface heliostats are arranged under the tower in a set manner to form a mirror field (it is possible to fix a plurality of heat absorbers 11 around the tower T, the mirror field
  • the sub-rings are arranged around the lower part of the tower, and each of the heat absorbers corresponds to a part of the mirror field.
  • a heat absorber and a corresponding mirror field are taken as an example.
  • the mirror of the k-th surface heliostat M k faces the heat absorber H, and forms a spot on the heat sink by reflecting the light of the sun.
  • the surface heliostat M k is fixed in position and can be rotated horizontally and vertically.
  • the axis Z of the horizontal rotation and the axis X of the vertical rotation pass through the mirror center Q k .
  • the mirror width Q k through the mirror center is D k
  • the height is H k
  • k is a natural number of 1, 2, 3 to m.
  • the imaging unit mainly comprising a first lens E and a camera or camera connected to the first lens and the camera or the camera Connected to the computer, the first lens E is disposed in a central region corresponding to the heat absorber H, and the distance from the mirror surface center Q k of the k-th surface of the mirror field is a fixed value L k , and the center line EQ is formed.
  • the angle between k and the plane of the heliostat is decomposed into an azimuth angle e k on the horizontal plane and ci) k on the vertical plane.
  • a rotatable first lens or a plurality of first lenses may be employed.
  • the first lens is placed on a U-position that is centered around the center of the heat absorber, and the mirror field is divided into corresponding U regions, each of which corresponds to a positioning position of the first lens on the circumference.
  • the first lens in a circumferential E C H 0 H of the center of the heat sink 4 can be positioned with a location corresponding to the mirror field is divided into four regions, each region on the circumference of the first lens A positioning position corresponds.
  • the first lens should have sufficient resolution, wide angle (can observe the entire mirror field), telescopic lens (similar to the furnace flame probe), adjustable receiving light intensity, high temperature resistance and high brightness, and can image the entire mirror field, ie All heliostats in the mirror field can be observed in lens E.
  • the steps to determine if the mirror position of the heliostat is correct by this image are as follows:
  • the first imaging unit is used to shoot the mirror field. All the heliostats in the mirror field are perpendicular to EQ k to form the initial image of the mirror field.
  • the pixel coordinates of the center of each heliostat are established by the initial image. The value is taken as the center coordinate of the heliostat, and the pixel amount N Dk and ⁇ 1 ⁇ 2 included in the linear direction of the mirror center through the mirror width D k and the height H k are calculated, and the pixel length and the pixel unit length are obtained, thereby obtaining the width D.
  • the corresponding value of k and height 3 ⁇ 4 and the amount of pixels N Dk and ⁇ are the corresponding value of k and height 3 ⁇ 4 and the amount of pixels N Dk and ⁇ .
  • the first imaging unit performs a shooting on the mirror field at each set time interval to form an image as shown in FIG. 8.
  • the computer analyzes the captured image as follows: The surface of the heliostat with a virtual image of the sun (with strong reflections, which can be displayed on the photo) is calculated. If the center Q k ' of the virtual image coincides with the center Q k of the heliostat, then the heliostat can be determined.
  • Azimuth and elevation are accurate; if there is a heliostat with its virtual image
  • the center of the center and the heliostat must have a certain number of gaps, as shown in Figure 9, at the k34 position of the heliostat, according to the formula:
  • the k34 mirror requires azimuth adjustment ⁇ 34 and elevation angle adjustment ⁇ 34 .
  • the imaging unit of the present embodiment actually includes two portions, a first imaging unit and a second imaging unit composed of a plurality of second lenses, a second camera or a plurality of second cameras and a computer.
  • the first imaging unit and the second imaging unit respectively perform corresponding mirror image capturing, respectively forming corresponding initial images of the mirror field, and each of the heliostats corresponding to the first and second imaging units is respectively established by the initial image.
  • the center pixel coordinate value as the center coordinate of the heliostat, obtains the mirror field center coordinate set.
  • the pixel amounts N D and N H included in the linear direction of the mirror width D and the height ⁇ are calculated.
  • the corresponding mirror field is adjusted by the first imaging unit to confirm that all the heliostat azimuths and the field of view are correct, the first lens leaves the center position of the heat sink, for example, retracts to the underside of the heat sink.
  • the second imaging unit acts as a monitoring task for the heliostats in the mirror field while the tower solar thermal power system is operating.
  • the second imaging unit performs a photographing at each set time interval to form a current image. All the images captured by the second lens F in the second imaging unit can only be captured in the corresponding mirror field.
  • the mirror M as shown in Fig. 7, does not capture the virtual image of the sun in the heliostat M.
  • the lens F can observe the virtual image of the sun. In the captured image, there is a virtual image of the sun.
  • the k23 and k45 are fixed mirrors. At this point, the computer can determine which heliostat is deviated.
  • the cloud blocks the sun, it can be automatically tracked by the sun angle formula and the angle sensor. If it exceeds a certain time, the first imaging unit can be moved back to the center of the heat sink until the sun appears and all heliostats in the mirror field are corrected.
  • k34 and k45 do not necessarily appear on the same lens of the same second imaging unit, so all captured images of the entire second imaging unit need to be processed.
  • 10 and 9 are photographs taken by the corresponding lens and the first imaging unit in the second imaging unit at the same time.
  • the present embodiment is directed to a correction method for generating an error due to movement when the imaging unit in the above embodiment moves relative to the mirror field.
  • the movement of the first imaging unit causes the deviation of the imaging, that is, the image formed after the two movements is different, which directly affects the accuracy of the correction; the wind or the mechanical cause also causes the images of the first and second imaging units. error.
  • the first and second imaging units are covered, and the illumination frequency of the controllable laser emitter or the high-intensity illumination device corresponds to the photographing time interval.
  • a mirror correction image including a controllable laser emitter or a high-intensity illumination device is captured by the first imaging unit and the second imaging unit, and the computer establishes pixel coordinate values of the position of the controllable laser emitter or the high-intensity illumination device through the corrected image .
  • a standard coordinate system is established, and it is determined that each center of the mirror field corresponds to the standard sitting a reference pixel coordinate of the calibration system; selecting a time point corresponding to the time interval, and performing imaging calculation of the heliostat pixel position relative to the coordinate system by imaging formed by the first lens, determining the current corresponding heliostat Pixel coordinates; compare the pixel coordinates of the current heliostat with the reference coordinates: If there is no difference in the pixel position, or the difference is within the set range, the corresponding heliostat does not need to be adjusted, such as the difference in pixel position exceeds the setting The range is determined, and the heliostats need to be adjusted. The adjustment is performed according to the steps described in the above embodiments 1 and 2. This eliminates the deviation caused by the movement of the imaging unit.
  • the planar heliostats of Embodiments 1 and 2 can be completely replaced with parabolic mirrors.
  • the heliostat M in an ideal design is not a plane mirror, but rather a parabolic mirror. If an ideal parabolic mirror is formed that is focused on the lens of the imaging unit, the spot reflected by the sunlight to the position of the imaging unit is a point when the sun, the parabolic mirror, and the imaging unit are in a straight line. In the image observed or captured in the imaging unit, the entire parabolic mirror surface is exactly the evenly distributed sunlight. In fact, the spot of the parabolic mirror on the image taken by the imaging unit is an irregular bright block smaller than the heliostat, and the imaging unit observes uneven distribution of sunlight on the entire mirror surface of the parabolic mirror.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Photovoltaic Devices (AREA)

Abstract

La présente invention concerne un procédé de détection d'écart angulaire d'héliostat pour centrale thermodynamique à tour solaire. La centrale thermosolaire comprend un absorbeur thermique (H) fixé sur une tour (T), et plusieurs héliostats (M). La centrale thermosolaire comprend une unité d'imagerie. L'unité d'imagerie comprend une lentille (E), un appareil photo ou une vidéo caméra connecté(e) à la lentille (E), et un calculateur connecté à l'appareil photo ou à la vidéo caméra. La lentille (E) est agencée au centre de l'absorbeur thermique (H) ou le long de sa périphérie. Afin de déterminer si, en fonction d'une image prise par l'unité d'imagerie, les positions des héliostats sont correctes, on procède aux étapes suivantes, consistant à : (1) établir les coordonnées du centre (QK) de chaque héliostat (M) dans le champ héliostat ; (2) chercher, lorsque le système fonctionne, une image obtenue pour les coordonnées du centre (QK') d'une image virtuelle du soleil ou l'image virtuelle du soleil ; (3) déterminer si l'angle de l'héliostat (M) est correct, en déterminant un rapport de recouvrement entre le centre (QK') de l'image virtuelle du soleil et le centre (QK) de l'héliostat, ou s'il existe une image virtuelle du soleil. Grâce à la présente invention, il est possible d'améliorer le rendement, le degré d'automatisation, et la véracité de la détection.
PCT/CN2012/001049 2011-10-18 2012-08-06 Procédé de détection d'écart angulaire d'héliostat pour centrale thermodynamique à tour solaire WO2013056507A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201110315387.6 2011-10-18
CN201110315387.6A CN102506810B (zh) 2011-10-18 2011-10-18 塔式太阳能热发电系统的定日镜角度偏差检测方法

Publications (1)

Publication Number Publication Date
WO2013056507A1 true WO2013056507A1 (fr) 2013-04-25

Family

ID=46218918

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2012/001049 WO2013056507A1 (fr) 2011-10-18 2012-08-06 Procédé de détection d'écart angulaire d'héliostat pour centrale thermodynamique à tour solaire

Country Status (2)

Country Link
CN (1) CN102506810B (fr)
WO (1) WO2013056507A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3311079A4 (fr) * 2015-06-19 2019-01-16 Solarreserve Technology, LLC Caractérisation d'héliostat en utilisant la lumière stellaire
CN110609575A (zh) * 2019-09-24 2019-12-24 浙江中光新能源科技有限公司 用于塔式光热发电的定日镜与光伏板相结合的定日镜系统

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102506810B (zh) * 2011-10-18 2014-11-12 邵文远 塔式太阳能热发电系统的定日镜角度偏差检测方法
CN103019261B (zh) * 2012-12-27 2015-06-24 东方电气集团东方锅炉股份有限公司 双轴跟踪定日镜方位角标定和检测方法
CN103345261B (zh) * 2013-06-18 2015-10-21 华北电力大学 定日镜反射光斑偏差校正方法
CN104865975B (zh) * 2015-04-30 2018-05-08 包头市艾派克自动化科技有限公司 大规模太阳能电站的太阳跟踪控制方法
AU2016208290B2 (en) * 2015-08-05 2022-03-17 Commonwealth Scientific And Industrial Research Organisation Closed loop control system for heliostats
CN105202785B (zh) * 2015-09-15 2018-03-30 深圳市爱能森科技有限公司 一种控制集热器光斑的方法及装置
ES2671847B1 (es) * 2015-10-16 2019-05-14 Abengoa Solar New Tech Calibracion de heliostatos de una planta de energia solar termoelectrica
CN105334873A (zh) * 2015-11-30 2016-02-17 华东交通大学 一种太阳能定日镜转动精度的检测方法
CN106996648B (zh) * 2017-04-12 2019-03-29 东南大学 一种确定菲涅耳定日镜各圈子镜倾角的方法
CN106940571B (zh) * 2017-04-14 2023-06-06 主力能源有限公司 一种塔式定日镜聚光偏差传感器
CN107238376B (zh) * 2017-05-12 2019-06-14 罗耿 一种定日镜姿态传感器及定日镜自动跟踪方法
CN109062269A (zh) * 2018-08-23 2018-12-21 杨军峰 一种定日镜自动聚焦纠偏方法、装置及系统
CN108958229B (zh) * 2018-08-24 2024-05-17 首航高科能源技术股份有限公司 一种快速定性检测定日镜跟踪准确性的方法及装置
CN110118527B (zh) * 2019-03-29 2020-07-14 浙江中控太阳能技术有限公司 一种bcs系统精度检测方法及装置
CN110118642B (zh) * 2019-05-09 2021-01-08 浙江中控太阳能技术有限公司 基于圆柱形吸热塔标靶的定日镜精度检测方法及系统
CN112578820A (zh) * 2019-09-29 2021-03-30 何开浩 塔式太阳能发电系统的太阳光跟踪装置及跟踪方法
CN113375632B (zh) * 2021-05-20 2022-09-16 浙江可胜技术股份有限公司 一种用于定日镜初始安装偏差测试装置及方法
CN114640791A (zh) * 2022-01-27 2022-06-17 浙江大华技术股份有限公司 镜片角度调节方法、装置、计算机设备和摄像机
CN117093022A (zh) * 2023-10-20 2023-11-21 杭州华鼎新能源有限公司 一种定日镜瞄准系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101303270A (zh) * 2008-05-26 2008-11-12 中国科学院电工研究所 一种球面太阳定日镜的面形校准方法
US20110155119A1 (en) * 2007-03-30 2011-06-30 Kevin Hickerson Heliostat with integrated image-based tracking controller
CN102175066A (zh) * 2011-02-14 2011-09-07 吴建华 一种用于塔式太阳能热发电站的定日镜跟踪控制装置
CN102506810A (zh) * 2011-10-18 2012-06-20 邵文远 塔式太阳能热发电系统的定日镜角度偏差检测方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7207327B2 (en) * 2004-06-15 2007-04-24 United Technologies Corporation Feedback control method for a heliostat
US20110120448A1 (en) * 2009-11-25 2011-05-26 Google Inc. Heliostat control scheme using cameras
CN201983486U (zh) * 2011-02-18 2011-09-21 南京科远自动化集团股份有限公司 塔式太阳能热发电站的定日镜跟踪控制装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110155119A1 (en) * 2007-03-30 2011-06-30 Kevin Hickerson Heliostat with integrated image-based tracking controller
CN101303270A (zh) * 2008-05-26 2008-11-12 中国科学院电工研究所 一种球面太阳定日镜的面形校准方法
CN102175066A (zh) * 2011-02-14 2011-09-07 吴建华 一种用于塔式太阳能热发电站的定日镜跟踪控制装置
CN102506810A (zh) * 2011-10-18 2012-06-20 邵文远 塔式太阳能热发电系统的定日镜角度偏差检测方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3311079A4 (fr) * 2015-06-19 2019-01-16 Solarreserve Technology, LLC Caractérisation d'héliostat en utilisant la lumière stellaire
CN110609575A (zh) * 2019-09-24 2019-12-24 浙江中光新能源科技有限公司 用于塔式光热发电的定日镜与光伏板相结合的定日镜系统
CN110609575B (zh) * 2019-09-24 2022-06-14 浙江中光新能源科技有限公司 用于塔式光热发电的定日镜与光伏板相结合的定日镜系统

Also Published As

Publication number Publication date
CN102506810B (zh) 2014-11-12
CN102506810A (zh) 2012-06-20

Similar Documents

Publication Publication Date Title
WO2013056507A1 (fr) Procédé de détection d'écart angulaire d'héliostat pour centrale thermodynamique à tour solaire
US20130021471A1 (en) Reflective Surface Orientating with Multiple View Ports
CN108958229B (zh) 一种快速定性检测定日镜跟踪准确性的方法及装置
US20120174909A1 (en) Heliostat Control Scheme Using Cameras
WO2013083053A1 (fr) Procédé d'étalonnage et système d'étalonnage pour héliostat de station d'énergie solaire
US7994459B2 (en) Camera-based heliostat calibration with artificial light sources
WO2013017097A1 (fr) Dispositif d'étalonnage et procédé d'étalonnage pour héliostat
CN106249764B (zh) 以太阳为参照物的定日镜角度零点自动标定装置及方法
CN102506811B (zh) 基于图像检测的定日镜反射角度在线检测及校正方法
WO2013044850A1 (fr) Système d'étalonnage et procédé d'étalonnage pour héliostat dans une centrale solaire
US20120192917A1 (en) Solar tracker mechanism
CN108413987B (zh) 一种定日镜的校准方法、装置及系统
CN109508043B (zh) 一种基于图像的定日镜二次反射指向校正现场系统及方法
CN201983486U (zh) 塔式太阳能热发电站的定日镜跟踪控制装置
CN106644399A (zh) 一种用无人机校正定日镜偏差的系统和方法
US20110317876A1 (en) Optical Control System for Heliostats
WO2013017099A1 (fr) Dispositif d'étalonnage et procédé d'étalonnage pour héliostat
WO2013044849A1 (fr) Système d'étalonnage et procédé d'étalonnage d'héliostat de centrale solaire
CN109557947A (zh) 一种塔式定日镜的双闭环跟踪控制方法
CN106705841B (zh) 基于视觉测量的太阳能聚光器镜面定量调焦方法
CN105987671A (zh) 一种便携式太阳能聚光器面型检测装置及方法
CN110793494B (zh) 一种提高定日镜初始安装角度精度的方法及装置
JP2016056965A (ja) ヘリオスタット、太陽光集光システム、および、太陽光集光システムの制御方法
CN107339933B (zh) 一种槽式太阳能聚光反射镜的安装检测方法
CN110209205A (zh) 一种基于镜面标记的定日镜校正方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12842053

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12842053

Country of ref document: EP

Kind code of ref document: A1