CN102354226B - Heliostat calibration system of solar power station and calibration method - Google Patents
Heliostat calibration system of solar power station and calibration method Download PDFInfo
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- CN102354226B CN102354226B CN201110303115.4A CN201110303115A CN102354226B CN 102354226 B CN102354226 B CN 102354226B CN 201110303115 A CN201110303115 A CN 201110303115A CN 102354226 B CN102354226 B CN 102354226B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
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- 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
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Abstract
The invention discloses a heliostat calibration system of a solar power station, which comprises a receiver, a heliostat field, an image sensor group and a control unit. The heliostat field is arranged around the receiver; the image sensor group is used for capturing a light spot reflected by a heliostat formed via irradiation of a calibration light source; the control unit is used for processing image information obtained by the image sensor group, calibrating and tracking parameters of the heliostat of the sun and controlling rotation of the heliostat; and the image sensor group is arranged on the heliostat field, so that an image reflected by the heliostat falls into the collection scope of the image sensor group. The center position of the light spot reflected by the heliostat can be obtained by the control unit according to the image information of the image sensor group, and finally an error of the heliostat to be calibrated can be obtained. Since the center position of the light spot reflected by the heliostat is determined via movement of the image sensor group, the calibration can be completed rapidly, the mechanical error is small, and the calibration accuracy can be improved. The invention simultaneously discloses a calibration method of the calibration system.
Description
Technical field
The invention belongs to field of solar thermal power generation, particularly a kind of heliostat calibration system and tracking of solar power plant.
Background technology
In central authorities' tower receiver power house, the receiver of tower top is accepted the sunshine from the reflection of heliostat group.Receiver conversion incident radiation energy output high-pressure and high-temperature steam, can send into afterwards turbine and carry out power generation.Heliostat is generally installed on tower ground around.Each heliostat has rigidity reflecting surface, can follow the tracks of the sun, and surface adopts orientation on the sunny side daytime, keeps the mobile sunshine of reflection to receiver.Need pin-point accuracy and follow the tracks of the sun, reduce the reflected light that receiver overflows around.Therefore provide a kind of heliostat calibration system that can accurately follow the tracks of the less loss of sun realization to become the technical matters that those skilled in the art need solution badly.
For addressing the above problem, the conventional calibration steps of existing heliostat calibration system is: the hot spot locus of detecting heliostat reflected sunlight by imageing sensor, the center of hot spot namely, and the anglec of rotation of this corresponding heliostat, the anglec of rotation herein refers to the angle of pitch φ peace cradle angle ω of heliostat, draw the error amount of the required calibration of this heliostat, according to the error amount obtaining, upgrade the parameter of heliostat in database, according to the position of these parameters and receiver and the sun, calculate heliostat needs sunlight reflected the angle of rotation on receiver, start to follow the tracks of.
For example, Chinese patent CN101918769A discloses the calibration of heliostat in a kind of central tower receiver solar generating plant and tracking and controlling method, and it comprises and flashes back the sunlight to the heliostat field of receiver, points to the video camera of at least certain solar eyepiece subgroup.Camera arrangement is for producing the sunlight image of a plurality of heliostat reflections.This system is calibrated by above-mentioned calibration steps.In calibration process, the process of determining spot center position is as follows: the hot spot that first catches heliostat reflection by video camera, now heliostat is in initial configuration, in order to make video camera find the flare center of heliostat, control system is controlled heliostat and is rotated, till finally making heliostat turn to video camera to capture spot center position.The path diagram that the heliostat that Fig. 1 carries out while obtaining spot center sample for use video camera rotates, the orientation of heliostat is controlled with two rotation angle, yawing angle ω and the angle of pitch
yawing angle ω represents along transverse axis.The angle of pitch
along Z-axis, represent.By this trajectory diagram, can draw, this system needs heliostat repeatedly to rotate could arrive the position that video camera can detect spot center.Its control program is complicated, and calibration actions is slower; The repeatedly track of heliostat rotates and has introduced machine error simultaneously, and calibration accuracy reduces.In larger generating plant, the rotation of the heliostat that quantity is huge can consume the electric energy of the calibration motor of controlling heliostat rotation in addition.Again for example, in US Patent No. 20100139644, although while calibrating, the rotary motion trace of heliostat is simplified to some extent compared with CN101918769A, but in order to obtain heliostat flare outline position, still need control system to control a large amount of heliostats and turn to video camera and can flutter the position of grasping; Like this, the flare of heliostat cannot be radiated on receiver, has affected generating efficiency.
Summary of the invention
For this reason, technical matters to be solved by this invention is that existing heliostat calibration system calibration actions is complicated, provides a kind of can calibration accuracy high, the heliostat calibration system of the fast simultaneously solar power plant that operating cost is low of calibration speed.
For solving the problems of the technologies described above, the heliostat calibration system of a kind of solar power plant of the present invention, it comprises: receiver, described receiver is for receiving the sunshine of heliostat reflection; The heliostat field that at least one heliostat forms: it is installed on described receiver around; The imageing sensor group that at least one imageing sensor forms: for gathering the regulation light source reflected image of heliostat; And control module: the image information obtaining for the treatment of imageing sensor group, and the parameter of the heliostat of the calibration tracking sun is controlled heliostat rotation simultaneously; Described imageing sensor is arranged on heliostat field, and the reflected image that makes to reflex to the heliostat outside described receiver falls into the acquisition range of described imageing sensor group.
The regulation light source reflected image of the heliostat that described imageing sensor group collects is spot, for obtaining the profile of heliostat flare; At described control module, controlling described heliostat rotates, while making the flare aligning receiver of described heliostat, described imageing sensor group gathers the image of described heliostat flare, the image information that described control module gathers according to imageing sensor group, determine the spot center position of described heliostat reflection, and described heliostat is calibrated.
Described imageing sensor is installed on movably on the mounting bracket between described receiver and described heliostat field, described imageing sensor gathers face towards described receiver setting around the circumferential and described imageing sensor of described receiver, and it moves up and down along described mounting bracket.
Described imageing sensor can be installed on rotary installing support up or down, and described imageing sensor along continuous straight runs arrangement and its collection face are towards described receiver setting, and described rotary installing support can rotate around the support tower of described receiver.
Described imageing sensor group and described heliostat field are installed on respectively the relative both sides of described receiver, described imageing sensor is installed on Plane Installation support movably, described imageing sensor group is arranged along horizontal or vertical direction, and it along described Plane Installation support up and down or move left and right.
Imageing sensor group is fixedly installed on the mounting bracket between described receiver and described heliostat, and described mounting bracket is around the receiving plane setting of described receiver.
Described imageing sensor assembly is equipped with for weakening the dimmer arrangement of light intensity, and described dimmer arrangement comprises the absorption plant of reflection of light device and/or light.
Described dimmer arrangement is the dimmer arrangement of adjustable dim light intensity.
Described imageing sensor assembly is equipped with the shade for keeping the sun off.
Described imageing sensor assembly is equipped with for measuring the light intensity sensor of light intensity.
Described imageing sensor assembly is equipped with cooling device, and described cooling device is air-cooled or water cooling plant.
Described heliostat disposes two turning axles, and described heliostat carries out pitch rotation and yawing rotation around described turning axle; Described Double rotation axle is furnished with angular transducer, the actual angle turning over for two turning axles of Accurate Measurement.
Described heliostat disposes two turning axles, and described heliostat carries out pitch rotation around turning axle described in two respectively; Described Double rotation axle is furnished with angular transducer, the actual angle turning over for two turning axles of Accurate Measurement.
Described calibration system also comprises looks a day tracking transducer, and it is for real-time follow-up position of sun.
Described calibration system also comprises the position transducer being installed on described imageing sensor group moving track, for determining the position of receiver and imageing sensor.
Described regulation light source is sunshine light source or artificial light source.
The present invention discloses a kind of calibration steps of applying the heliostat calibration system of above-mentioned solar power plant simultaneously, comprises the following steps:
A. control module is controlled described heliostat rotation, makes the flare of described heliostat aim at receiver;
B. imageing sensor group gathers the reflected image of heliostat, described control module is determined spot center position and the corresponding heliostat of heliostat reflection according to the image of described imageing sensor group collection, and obtains the described heliostat anglec of rotation by the measured value of described angular transducer or the order of control module;
C. control module is controlled described heliostat rotation, makes the flare of heliostat arrive the position that described imageing sensor can detect;
D. the error amount number n calibrating as required, repeating step b-c at least n/2 time;
E. according to the spot center position obtaining and the rotation angle information of heliostat, calculate the error amount of required calibration, and the error amount of calibration is stored to described control module.
Imageing sensor group described in step b is by moving up and down or move left and right or mode in rotary moving gathering the reflected image of heliostat, and the reflected image that makes to reflex to the heliostat outside described receiver falls into the acquisition range of described imageing sensor group.
When the hot spot of the collection of imageing sensor described in step b is part hot spot, described control module is controlled described heliostat rotation, makes whole hot spot drop on the position that can be captured by imageing sensor group.
Technique scheme of the present invention has the following advantages compared to existing technology:
(1) the present invention directly determines the flare center of the heliostat that does not reflex to receiver by imageing sensor group, it makes heliostat center alignment image sensor than the continuous rotation by heliostat in prior art, finally make image capture sensor arrive the mode of spot center position, calibration actions of the present invention is fast, machine error is little, and calibration accuracy improves.
(2) further, imageing sensor of the present invention is movably arranged on receiver around, in the receiving plane position of receiver, imageing sensor is not set, and equipment cost reduces; When imageing sensor moves, imageing sensor can only gather the heliostat not being irradiated on receiver, and control module is only calibrated for the heliostat not being irradiated on receiver simultaneously.All the other heliostats of aiming on receiver can continue normal work.Than prior art alignment and the distinct calibration system of generating, the efficiency of solar power plant of the present invention is higher.
(3) regulation light source of the present invention can select sunshine also can select artificial light source, during fine day, can calibrate by sunshine, selects artificial light source to realize equally the calibration of heliostat when cloudy day or night.
Accompanying drawing explanation
For content of the present invention is more likely to be clearly understood, below according to a particular embodiment of the invention and by reference to the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is the path diagram that the heliostat carried out while using video camera to obtain spot center sample in prior art rotates;
Fig. 2 is the schematic diagram of the heliostat calibration system in embodiment 1;
Fig. 3 is the hot spot figure that imageing sensor obtains while moving;
Fig. 4 is the vertical view of the heliostat calibration system in embodiment 1;
Fig. 5 is the image sensor architecture schematic diagram with dimmer arrangement;
Fig. 6 has the image sensor architecture schematic diagram of dimmer arrangement and shade;
Fig. 7 is the information flow block diagram of control module;
Fig. 8 is the schematic diagram of the heliostat calibration system of embodiment 2;
Fig. 9 is the schematic diagram of the heliostat calibration system of embodiment 3;
Figure 10 is the schematic diagram of the heliostat calibration system of embodiment 4.
In figure, Reference numeral is expressed as:
1-receiver 2-heliostat 3-imageing sensor 4-mounting bracket 5-dimmer arrangement 6-sunshine light source 7-mounting bracket 8-rotary installing support 9-support tower 10-Plane Installation support 12-looks a day tracking transducer 13-light intensity sensor 14,14 '-motor 15-cooling device 51-dim light disk 52-shade
Embodiment
Below with reference to accompanying drawing, use following examples to be further elaborated the present invention.
Embodiment 1
Figure 2 shows that the heliostat calibration system of solar power plant, it comprises a receiver 1 being installed on support tower 9, and the sunshine that described receiver 1 receives heliostat 2 reflections is with direct steam generation or electricity; Described receiver 1 guarantees that apart from the height on ground the heliostat 2 in described heliostat field all can reflex on described receiver 1.
The heliostat field that also comprises the surrounding that is installed on described receiver; Described heliostat field comprises at least one heliostat 2; Described heliostat 2 disposes two turning axles, and described heliostat 2 carries out pitch rotation around described turning axle, and yawing rotates; Described Double rotation axle is furnished with angular transducer, the actual luffing angle turning over for two turning axles of Accurate Measurement
and yawing angle ω.Described heliostat 2 is by adjusting minute surface orientation to follow the tracks of the mobile sun, so that sunshine is continued to reflex on receiver 1.
And the imageing sensor group that is radiated at the flare on heliostat 2 for catching regulation light source, described imageing sensor group comprises at least one imageing sensor 3.The image acquisition scope of described imageing sensor 3 is greater than the reflected range of described heliostat field.It gathers the flare that is not irradiated to the heliostat on receiver 1.Regulation light source in the present embodiment is sunshine light source 6.As another kind of embodiment, this regulation light source can also be artificial light source, and described artificial light source can be arranged on described receiver 1 or imageing sensor 3.
Described imageing sensor 3 is for being installed on the video camera on the mounting bracket 4 between described receiver 1 and described heliostat field.As shown in Figure 4, described imageing sensor component is a, b, c, d4 group, 4 picture group image-position sensors are around the circumferential setting of described receiver 1, and the collection face of described imageing sensor 3 arranges towards described receiver 1, and 4 picture group image-position sensors move up and down along mounting bracket 4 respectively.A, b, c, the heliostat in respectively corresponding 3,4,1,2 four regions of tetra-groups of sensors of d.By the mobile respectively of 4 imageing sensor groups, the heliostat in four regions is calibrated.When imageing sensor moves, by the imageing sensor on described receiver 1 owing to being subject to blocking of receiver 1, can not collect the hot spot that is irradiated to the heliostat on receiver 1, imageing sensor 3 can only collect the heliostat flare not being irradiated on receiver 1.In the present embodiment, described imageing sensor assembly is equipped with for weakening the dimmer arrangement 5 of light intensity; This dimmer arrangement 5 is the combination of the absorption plant of reflection of light device and light, for the protection of imageing sensor group, not affected by high light.The dim light degree of the dimmer arrangement 5 in the present embodiment is variable, as shown in Figure 5, described dimmer arrangement 5 comprises a dim light disk 51, it is arranged at before described imageing sensor 3, is along the circumferential direction divided into 6, and the light extinction rate of every is different, light intensity sensor 13 detects light intensity when stronger, control motor 14 this dimmer arrangement 5 is turned to high one of light extinction rate, light intensity sensor 13 detects light intensity when weak, controls motor 14 this dimmer arrangement 5 is turned to low one of light extinction rate.
Preferred, a shade 52 coaxial with dim light disk 51 can also be set described dim light disk 51 is front, as shown in Figure 6.Described shade 52 arranges a light hole, allows all sunshines to pass through, and other parts are covered all sunlight.During work, by motor 14 ', drive this shade 52 continuous rotations, asynchronous with dim light disk 51, when light hole and image sensor alignment, imageing sensor completes collection.This shade 52 can reduce the time shutter, further reduces the impact of high light on imageing sensor.
Described imageing sensor group also disposes cooling device 15, and described cooling device is air-cooled or water cooling plant, and this cooling device damages through the imageing sensor thermal radiation at receiver place for avoiding.
Described calibration system also comprises looks day tracking transducer 12, and it obtains sunray vector for real-time follow-up position of sun.
Described calibration system also comprises the position transducer being installed on described imageing sensor group moving track, for determining the position of receiver and imageing sensor.
This calibration system also comprises control module.As shown in Figure 7, the heliostat image information that described control module acceptance pattern image-position sensor group gathers, imageing sensor 3 positional informations that position transducer gathers, the sunshine positional information collecting depending on day tracking transducer 12, and heliostat 2 rotation angle information of angular transducer collection; And the rotation of the movement of control chart image-position sensor 3 and heliostat 2.At described control module, controlling described heliostat 2 rotates, while making the flare aligning receiver of described heliostat, described imageing sensor group 3 gathers the image that is not irradiated to the heliostat flare on receiver 1, the image information that described control module gathers according to imageing sensor group, determine the spot center position of described heliostat 2 reflections, and calibrate not aiming at the heliostat 2 of receiver 1.
Described control module obtains the spot center position of described heliostat reflection by the continuous moving of imageing sensor group.When serialization graph image-position sensor group used time 30t from one end uniform motion of guide rail to the other end, can obtain the X-Y scheme shown in Fig. 3, it reflects the situation that can capture the imageing sensor of flare in the whole time period.According to this figure, just can release the locus at flare center, i.e. the position of form center of hot spot figure.
Described calibration system, by being installed on the rotation angle of the angular transducer acquisition heliostat on heliostat turning axle, is namely passed through the angle of pitch
yawing angle ω information, and then draw the error amount of the required calibration of this heliostat.Wherein, the angle of pitch of heliostat
for the anglec of rotation of heliostat around the axle parallel with surface level, the yawing angle ω of heliostat is that heliostat is around the anglec of rotation of the axle vertical with surface level.
When heliostat is calibrated, first determine the error that needs calibration, in the present embodiment, need the error of calibration to be: the angle of pitch and yawing angle
the non-perpendicular degree η of two turning axles
0, heliostat minute surface center o locus (x, y, z), and three Euler's corner (α of the relative global coordinate system of heliostat local Coordinate System
0, β
0, γ
0).In other embodiment, can also introduce more error parameter, to improve calibration accuracy.
Wherein, the angle of pitch of heliostat
for the anglec of rotation of heliostat around the axle parallel with surface level, the yawing angle ω of heliostat is that heliostat is around the anglec of rotation of the axle vertical with surface level, the center of heliostat is the position coordinates (x at the minute surface center of heliostat, y, z), the non-perpendicular degree error of turning axle is the actual angle value of two turning axles.Euler's corner (α
0, β
0, γ
0) be that heliostat local Coordinate System is with respect to the drift angle of three coordinate axis of global coordinate system.
According to the error of required calibration, the calibration steps of this heliostat calibration system comprises the following steps:
A. control module is controlled described heliostat rotation, makes the flare of described heliostat aim at receiver;
B. imageing sensor group is moved for the first time by receiver top to receiver bottom, described imageing sensor group detects the hot spot of heliostat reflection, control module is determined the spot center position of the heliostat of misalignment receiver, obtains the angle of pitch and the yawing angle of described heliostat simultaneously;
C. control module is controlled described heliostat rotation, makes the flare of heliostat arrive the position that described imageing sensor can detect;
D. repeat step b-c 5 times, obtain 5 groups of spot center positions and the heliostat angle of pitch and yawing angle numerical value;
E. according to above-mentioned 5 groups of data, by the formula that calibrates for error, calculate the error amount of required calibration: angle of pitch error, yawing angle error, rotates center error and Euler's angular errors of non-perpendicular degree error, heliostat, and above-mentioned error amount is stored to described control module.
The above-mentioned formula that calibrates for error is:
Wherein, ω is the yawing angle that heliostat rotates around turning axle;
the angle of pitch rotating around turning axle for heliostat;
for the vector of unit length vertical with surface level;
for sunshine light vector;
K is spot center position coordinates;
O is heliostat minute surface center position coordinates.
In step a, when the hot spot of described imageing sensor 3 collections is part hot spot, control module is first according to the part light spot profile having obtained, reference area value A; Extrapolate corresponding heliostat, then according to the registered location of heliostat, calculate area A 0 value of flare, show that residue facula area value is A0-A, by rectangle or polygonal mode, supply residue light spot profile.Finally calculate part light spot profile and the geometric centroid of supplying area addition figure, described control module is controlled described heliostat rotation, makes heliostat turn to whole hot spot and drops on the position that can be captured by imageing sensor group.
For improving calibration accuracy, can also repeat more times step a-b, obtain spot center position and the heliostat angle of pitch and the yawing angle numerical value of more groups, according to multi-group data, by the formula that calibrates for error, calculate the error amount of required calibration.
Embodiment 2
Figure 8 shows that the heliostat calibration system of the present embodiment, this calibration system is from the different of calibration system in embodiment 1: the heliostat field in the present embodiment is positioned at a side of described receiver 1.Described imageing sensor group is fixedly installed on described receiver 1 mounting bracket 7 around.Its acquisition range is all heliostat flares that are not irradiated on receiver 1.The uniform arrangement on described mounting bracket 7 of described imageing sensor, in the present embodiment, imageing sensor longitudinally and horizontal uniform arrangement.
In heliostat error hour, only need the angle of pitch peace cradle angle error of calibration heliostat.In the present embodiment, need the error of calibration to be: the angle of pitch of heliostat and yawing angle
error, the calibration process of this heliostat calibration system comprises the following steps:
A. control module is controlled described heliostat rotation, makes the flare of described heliostat aim at receiver;
B. the collection of imageing sensor group is not irradiated to the heliostat image on receiver, and control module is determined the spot center position of this heliostat, obtains the angle of pitch and the yawing angle of described heliostat simultaneously;
C. control module is controlled described heliostat rotation, makes the flare of heliostat arrive the position that described imageing sensor can detect;
D. according to above-mentioned 1 group of data, by the calibration equation described in embodiment 1, calculate the error amount of required calibration: angle of pitch error, yawing angle error, and the error amount of calibration is stored to described control module.
Wherein, Euler's corner (α
0, β
0, γ
0) calibration error value, heliostat minute surface center o locus (x, y, z) and the non-perpendicular degree η of two turning axles
0calibration error value is called the storing value in control module.
1 group of facula position data that calibration error in the present embodiment obtains by imageing sensor and the angle of pitch and the yawing angular data of heliostat are tried to achieve.And those skilled in the art should be easy to expect, for obtaining higher calibration accuracy, the facula position data that above-mentioned calibration error can also repeatedly obtain according to sensor and the angle of pitch of heliostat and yawing angular data are tried to achieve.
Embodiment 3
Fig. 9 is the heliostat calibration system in the present embodiment, the calibration system of itself and embodiment 1 is basically identical, its distinctive points is: described imageing sensor 3 can be installed on rotary installing support 8 up or down, described imageing sensor 3 along continuous straight runs are arranged and its collection face arranges towards described receiver 1, and described rotary installing support 8 can rotate around the support tower 9 of described receiver.Described control module is by the spot center position that moves up and down and rotate the described heliostat reflection of acquisition of imageing sensor group.
Described heliostat disposes two turning axle X-axis, the Y-axis parallel with surface level, and described heliostat carries out pitch rotation around turning axle described in two respectively; Described two turning axles are furnished with respectively angular transducer, the luffing angle turning over for two turning axles of Accurate Measurement.
In the present embodiment, need the error of calibration to be: the angle of pitch and yawing angle
the non-perpendicular degree η of two turning axles
0, heliostat minute surface center o locus (x, y, z), and three Euler's corner (α of the relative global coordinate system of heliostat local Coordinate System
0, β
0, γ
0).The calibration process of this heliostat calibration system comprises the following steps:
A. control module is controlled described heliostat rotation, makes the flare of described heliostat aim at receiver;
B. imageing sensor group is rotated after 1/4 week and is moved for the first time by receiver top to receiver bottom along described support tower, described imageing sensor group detects the hot spot of the heliostat reflection of its faces direction, control module is determined the spot center position of the heliostat of misalignment receiver, obtains the angle of pitch and the yawing angle of described heliostat simultaneously;
C. control module is controlled described heliostat rotation in this region, makes the flare of heliostat arrive the position that described imageing sensor can detect;
D. repeat step a-b 9 times, obtain 9 groups of data, according to the calibration equation described in embodiment 1, calculate the error amount of required calibration: angle of pitch error, yawing angle error, the non-perpendicular degree error of turning axle, and heliostat minute surface center o locus error, and Euler's angular errors, and the error amount of calibration is stored to described control module.
Wherein, the above-mentioned formula that calibrates for error is:
Wherein,
the angle of pitch rotating around X-axis for heliostat;
the angle of pitch rotating around Y-axis for heliostat;
for the vector of unit length vertical with surface level;
for sunshine light vector;
K is spot center position coordinates;
O is heliostat minute surface center position coordinates.
Like this, realized this imageing sensor calibration to the heliostat in region; In the time need to calibrating the heliostat of other directions, continue the described imageing sensor of rotation and repeat above-mentioned calibration steps.
Embodiment 4
Fig. 8 is the calibration system in the present embodiment, the calibration system of itself and embodiment 2 is basically identical, its distinctive points is: the described imageing sensor 3 of the present embodiment is installed on the Plane Installation support 10 between described heliostat field and receiver 1, described imageing sensor group lays respectively at receiver 1 upside and downside, and be positioned at receiver 1 left and right sides, its equal along continuous straight runs is arranged, and along described Plane Installation support 10, moves up and down.
In the present embodiment, the move mode of described imageing sensor group is for moving with the intermittence at certain hour interval, and this move mode can obtain heliostat field flare when described imageing sensor group is stopped, and its image quality is high.Meanwhile, intermittent movement can be adjusted the light extinction rate of dimmer arrangement easily.
In the present embodiment, the calibration steps of heliostat is consistent with the calibration steps in embodiment 1.
Obviously, above-described embodiment is only for example is clearly described, and the not restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without also giving all embodiments.And the apparent variation of being extended out thus or change are still among the protection domain in the invention.
Claims (14)
1. a heliostat calibration system for solar power plant, it comprises: receiver (1), described receiver (1) is for receiving the sunshine of heliostat reflection;
The heliostat field that at least one heliostat (2) forms: it is installed on described receiver around;
The imageing sensor group that at least one imageing sensor (3) forms: for gathering the regulation light source reflected image of heliostat;
And control module: the image information obtaining for the treatment of imageing sensor group, and the parameter of the heliostat of the calibration tracking sun is controlled heliostat rotation simultaneously; It is characterized in that:
Described imageing sensor moves up and down or moves left and right or is arranged at rotationally on heliostat field, and the reflected image that makes to reflex to the outer heliostat of described receiver (1) falls into the acquisition range of described imageing sensor group; The regulation light source reflected image of the heliostat that described imageing sensor group collects is spot, for obtaining the profile of heliostat flare; At described control module, controlling described heliostat (2) rotates, while making the flare aligning receiver of described heliostat, described imageing sensor group (3) is by moving up and down or move left and right or gather rotationally the image of described heliostat flare, the image information that described control module gathers according to imageing sensor group, determine the spot center position of described heliostat (2) reflection, and described heliostat (2) is calibrated; Described imageing sensor (3) is installed on the mounting bracket (4) being positioned between described receiver (1) and described heliostat field movably, described imageing sensor (3) arranges towards described receiver (1) around circumferential and described imageing sensor (3) the collection face of described receiver (1), and it moves up and down along described mounting bracket (4); Or described imageing sensor (3) can be installed on rotary installing support (8) up or down, described imageing sensor (3) along continuous straight runs is arranged and its collection face arranges towards described receiver (1), and described rotary installing support (8) can rotate around the support tower (9) of described receiver; Or described imageing sensor group and described heliostat field are installed on respectively the relative both sides of described receiver (1), described imageing sensor (3) is installed on Plane Installation support (10) movably, described imageing sensor group is arranged along horizontal or vertical direction, and it along described Plane Installation support (10) up and down or move left and right.
2. the heliostat calibration system of solar power plant according to claim 1, is characterized in that:
Described imageing sensor assembly is equipped with the dimmer arrangement (5) for weakening light intensity, and described dimmer arrangement (5) comprises the absorption plant of reflection of light device and/or light.
3. the heliostat calibration system of solar power plant according to claim 2, is characterized in that:
Described dimmer arrangement is the dimmer arrangement (5) of adjustable dim light intensity.
4. the heliostat calibration system of solar power plant according to claim 3, is characterized in that:
Described imageing sensor assembly is equipped with the shade (52) for keeping the sun off.
5. the heliostat calibration system of solar power plant according to claim 4, is characterized in that:
Described imageing sensor assembly is equipped with the light intensity sensor (13) for measuring light intensity.
6. the heliostat calibration system of solar power plant according to claim 5, is characterized in that:
Described imageing sensor assembly is equipped with cooling device, and described cooling device is air-cooled or water cooling plant.
7. the heliostat calibration system of solar power plant according to claim 6, is characterized in that:
Described heliostat disposes two turning axles, and described heliostat carries out pitch rotation and yawing rotation around described turning axle; Described two turning axles are furnished with angular transducer, the actual angle turning over for two turning axles of Accurate Measurement.
8. the heliostat calibration system of solar power plant according to claim 6, is characterized in that:
Described heliostat disposes two turning axles, and described heliostat carries out pitch rotation around turning axle described in two respectively; Described two turning axles are furnished with angular transducer, the actual angle turning over for two turning axles of Accurate Measurement.
9. the heliostat calibration system of solar power plant according to claim 1, is characterized in that:
Described calibration system also comprises looks a day tracking transducer (12), and it is for real-time follow-up position of sun.
10. the heliostat calibration system of solar power plant according to claim 1, is characterized in that:
Described calibration system also comprises the position transducer being installed on described imageing sensor group moving track, for determining the position of receiver and imageing sensor.
The heliostat calibration system of 11. solar power plants according to claim 1, is characterized in that:
Described regulation light source is sunshine light source (6) or artificial light source.
12. 1 kinds of application rights require the calibration steps of the heliostat calibration system of the arbitrary described solar power plant of 1-11, it is characterized in that:
Comprise the following steps:
A. control module is controlled described heliostat rotation, makes the flare of described heliostat aim at receiver;
B. imageing sensor group gathers the reflected image of heliostat by the mode that moves up and down or move left and right or rotate, described control module is determined spot center position and the corresponding heliostat of heliostat reflection according to the image of described imageing sensor group collection, and obtains the described heliostat anglec of rotation by the measured value of angular transducer or the order of control module;
C. control module is controlled described heliostat rotation, makes the flare of heliostat arrive the position that described imageing sensor can detect;
D. the error amount number n calibrating as required, repeating step b-c at least n/2 time;
E. according to the spot center position obtaining and the rotation angle information of heliostat, calculate the error amount of required calibration, and the error amount of calibration is stored to described control module.
The calibration steps of the heliostat calibration system of 13. solar power plants according to claim 12, is characterized in that:
Imageing sensor group described in step b is by moving up and down or move left and right or mode in rotary moving gathering the reflected image of heliostat, and the reflected image that makes to reflex to the outer heliostat of described receiver (1) falls into the acquisition range of described imageing sensor group.
The calibration steps of the heliostat calibration system of 14. solar power plants according to claim 12, it is characterized in that: when the hot spot of the collection of imageing sensor described in step b is part hot spot, described control module is controlled described heliostat rotation, makes whole hot spot drop on the position that can be captured by imageing sensor group.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110303115.4A CN102354226B (en) | 2011-09-29 | 2011-09-29 | Heliostat calibration system of solar power station and calibration method |
| PCT/CN2012/082326 WO2013044849A1 (en) | 2011-09-29 | 2012-09-28 | Heliostat calibration system and calibration method of solar power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110303115.4A CN102354226B (en) | 2011-09-29 | 2011-09-29 | Heliostat calibration system of solar power station and calibration method |
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| Publication Number | Publication Date |
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| CN102354226A CN102354226A (en) | 2012-02-15 |
| CN102354226B true CN102354226B (en) | 2014-09-24 |
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| CN201110303115.4A Expired - Fee Related CN102354226B (en) | 2011-09-29 | 2011-09-29 | Heliostat calibration system of solar power station and calibration method |
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| CN (1) | CN102354226B (en) |
| WO (1) | WO2013044849A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105022410A (en) * | 2015-05-07 | 2015-11-04 | 浙江中控太阳能技术有限公司 | System and method for calibrating heliostat of tower solar power generation system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354226B (en) * | 2011-09-29 | 2014-09-24 | 深圳市联讯创新工场科技开发有限公司 | Heliostat calibration system of solar power station and calibration method |
| CN108413987B (en) * | 2018-03-13 | 2021-03-26 | 深圳中科能投能源有限公司 | Heliostat calibration method, device and system |
| CN108958229B (en) * | 2018-08-24 | 2024-05-17 | 首航高科能源技术股份有限公司 | Method and device for rapidly and qualitatively detecting tracking accuracy of heliostat |
| CN109813754B (en) * | 2019-02-14 | 2022-06-28 | 浙江可胜技术股份有限公司 | System and method for measuring and optimizing heat absorber truncation efficiency |
| US11009263B2 (en) * | 2019-02-25 | 2021-05-18 | Karl von Kries | Systems and methods for altering rotation of a solar rotational manufacturing system |
| CN117664534B (en) * | 2024-01-31 | 2024-04-16 | 山东电力建设第三工程有限公司 | Grouping BCS (binary coded decimal) targeting verification method for tower type photo-thermal mirror field |
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- 2011-09-29 CN CN201110303115.4A patent/CN102354226B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| WO2013044849A1 (en) | 2013-04-04 |
| CN102354226A (en) | 2012-02-15 |
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