CN102354226A - 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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- CN102354226A CN102354226A CN2011103031154A CN201110303115A CN102354226A CN 102354226 A CN102354226 A CN 102354226A CN 2011103031154 A CN2011103031154 A CN 2011103031154A CN 201110303115 A CN201110303115 A CN 201110303115A CN 102354226 A CN102354226 A CN 102354226A
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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 the central authorities tower receiver power house, the receiver of cat head is accepted the sunshine from the reflection of heliostat group.Receiver conversion incident radiation energy output high-pressure and high-temperature steam can be sent into turbine afterwards and carry out power generation.Heliostat generally is installed on the ground around the tower.Each heliostat has the rigidity reflecting surface, can follow the tracks of the sun, and daytime is adopted orientation on the sunny side on the surface, and the sunshine that the maintenance reflection is moved is to receiver.Need pin-point accuracy ground to follow the tracks of the sun, reduce the reflected light that overflows around the receiver.Therefore provide a kind of sun of can accurately following the tracks of to realize that the heliostat calibration system of less loss becomes the technical matters that those skilled in the art need solution badly.
For addressing the above problem; Existing heliostat calibration system calibration steps commonly used is: the hot spot locus of detecting the heliostat reflected sunlight by imageing sensor; The center of hot spot just; And the anglec of rotation of heliostat that should correspondence; The anglec of rotation here is meant 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 that obtains; Upgrade the parameter of heliostat in database; Position according to these parameters and the receiver and the sun; Calculate the angle that heliostat need rotate sunlight reflected on receiver, begin to follow the tracks of.
For example, Chinese patent CN101918769A discloses heliostat calibration and the tracking and controlling method in a kind of central tower receiver solar generating plant, and it comprises the video camera that flashes back the sunlight and divide into groups to the certain at least day mirror of heliostat field, sensing of receiver.Camera arrangement is for can produce a plurality of heliostat sunlight reflected images.This system calibrates through above-mentioned calibration steps.In calibration process; The process of confirming the spot center position is following: the hot spot of at first catching the heliostat reflection through video camera; This moment, heliostat was in initial configuration; In order to make video camera find the flare center of heliostat; Control system control heliostat rotates, and finally makes heliostat turn to video camera and captures till the spot center position.Figure 1 is a sample using the camera to get executed when the spot center heliostat rotating rail line graph, heliostat orientation to two rotation angle control, flat roll angle and pitch angle ω
panning along the horizontal axis represents the angle ω.Pitch angle
along the vertical axis represents.Can draw through this trajectory diagram, this system needs heliostat repeatedly to rotate could arrive the position that video camera can detect spot center.Its controlling schemes is complicated, and calibration actions is slower; The repeatedly track of heliostat rotates and has introduced machine error simultaneously, and calibration accuracy reduces.In addition in bigger generating plant, the electric energy of the calibration motor that the rotation meeting Consumption Control heliostat of the heliostat that quantity is huge rotates.Again for example; In the US Patent No. 20100139644, though when calibration, the rotary motion trace of heliostat is simplified than CN101918769A to some extent; But, still need control system to control a large amount of heliostats and turn to video camera and can pounce on the position of grasping in order to obtain heliostat flare outline position; Like this, the flare of heliostat can't be radiated on the receiver, has influenced 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, said receiver are used to receive the sunshine of heliostat reflection; The heliostat field that at least one heliostat is formed: its be installed on said receiver around; The imageing sensor group that at least one imageing sensor is formed: the regulation light source reflected image that is used to gather heliostat; And control module: be used to handle the image information that the imageing sensor group obtains, and the parameter of the heliostat of the calibration tracking sun is controlled the heliostat rotation simultaneously; Said imageing sensor is arranged on the heliostat field, makes the reflected image that reflexes to the outer heliostat of said receiver fall into the acquisition range of said imageing sensor group.
The regulation light source reflected image of the heliostat that said imageing sensor group collects is a spot, is used to obtain the profile of heliostat flare; Controlling said heliostat at said control module rotates; When making the flare aligning receiver of said heliostat; Said imageing sensor group is gathered the image of said heliostat flare; The image information that said control module is gathered according to the imageing sensor group; Confirm the spot center position of said heliostat reflection, and said heliostat is calibrated.
Said imageing sensor is installed on movably on the mounting bracket between said receiver and the said heliostat field; Said imageing sensor is gathered face towards said receiver setting around the circumferential and said imageing sensor of said receiver, and it moves up and down along said mounting bracket.
Said imageing sensor can be installed on the rotation mounting bracket up or down, and said imageing sensor along continuous straight runs arrangement and its collection face are towards said receiver setting, and said rotation mounting bracket can rotate around the support tower of said receiver.
Said imageing sensor group and said heliostat field are installed on the relative both sides of said receiver respectively; Said imageing sensor is installed on the Plane Installation support movably; Said imageing sensor group is arranged along level or vertical direction, and it along said Plane Installation support up and down or move left and right.
The imageing sensor group is fixedly installed on the mounting bracket between said receiver and the said heliostat, and said mounting bracket is around the receiving plane setting of said receiver.
Said imageing sensor configuration set is useful on the dimmer arrangement that weakens light intensity, and said dimmer arrangement comprises the absorption plant of reflection of light device and/or light.
Said dimmer arrangement is the dimmer arrangement of adjustable dim light intensity.
Said imageing sensor configuration set is useful on the shade that keeps the sun off.
Said imageing sensor configuration set is useful on the light intensity sensor of measuring light intensity.
Said imageing sensor assembly is equipped with cooling device, and said cooling device is air-cooled or water cooling plant.
Said heliostat disposes two turning axles, and said heliostat carries out pitch rotation and yawing rotation around said turning axle; Said bispin rotating shaft is furnished with angular transducer, is used for accurately measuring two actual angles that turning axle turns over.
Said heliostat disposes two turning axles, and said heliostat carries out pitch rotation around two said turning axles respectively; Said bispin rotating shaft is furnished with angular transducer, is used for accurately measuring two actual angles that turning axle turns over.
Said calibration system also comprises looks a day tracking transducer, and it is used for the real-time follow-up position of sun.
Said calibration system also comprises the position transducer that is installed on the said imageing sensor group moving track, is used for confirming the position of receiver and imageing sensor.
Said regulation light source is sunshine light source or artificial light source.
The present invention discloses a kind of calibration steps of using the heliostat calibration system of above-mentioned solar power plant simultaneously, may further comprise the steps:
A. control module is controlled said heliostat rotation, makes the flare of said heliostat aim at receiver;
B. the imageing sensor group is gathered the reflected image of heliostat; Said control module is confirmed the spot center position of heliostat reflection and the heliostat of correspondence according to the image of said imageing sensor group collection, and obtains the said heliostat anglec of rotation through the measured value of said angular transducer or the order of control module;
C. control module is controlled the rotation of said heliostat, and making the flare of heliostat arrive said imageing sensor can detected position;
D. as required the calibration the error amount number n, repeating step b-c n/2 time at least;
E. according to the spot center position that obtains and the rotation angle information of heliostat, calculate the error amount of required calibration, and the error amount of calibration is stored to said control module.
The described imageing sensor group of step b is gathered the reflected image of heliostat through the mode that moves up and down or move left and right or rotation are moved, and makes the reflected image that reflexes to the outer heliostat of said receiver fall into the acquisition range of said imageing sensor group.
When the hot spot of the collection of imageing sensor described in the step b was the part hot spot, said control module was controlled the rotation of said heliostat, made whole hot spot drop on the position that can be captured by the imageing sensor group.
Technique scheme of the present invention is compared prior art and is had the following advantages:
(1) the present invention directly confirms not reflex to the flare center of the heliostat of receiver through the imageing sensor group; Its continuous rotation through heliostat in the prior art makes heliostat centrally aligned imageing sensor; 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 movably be arranged on receiver around, in the receiving plane position of receiver imageing sensor is not set, equipment cost reduces; When imageing sensor moved, imageing sensor can only be gathered the heliostat that does not shine on the receiver, and control module is only calibrated for the heliostat that does not shine on the receiver simultaneously.All the other heliostats of aiming on the receiver can continue operate as normal.In prior art, calibrate and the distinct calibration system of generating, the efficient of solar power plant of the present invention is higher.
(3) regulation light source of the present invention can select for use sunshine also can select artificial light source for use, can calibrate through sunshine when fine, selects artificial light source to realize the calibration of heliostat equally when cloudy day or night.
Description of drawings
For content of the present invention is more clearly understood, below according to a particular embodiment of the invention and combine accompanying drawing, the present invention is done further detailed explanation, wherein
Fig. 1 is the path diagram that the heliostat carried out when using video camera to obtain the spot center sample in the prior art rotates;
Fig. 2 is the synoptic diagram of the heliostat calibration system among the embodiment 1;
Fig. 3 is the hot spot figure that imageing sensor obtains when moving;
Fig. 4 is the vertical view of the heliostat calibration system among the embodiment 1;
Fig. 5 is the image sensor architecture synoptic diagram with dimmer arrangement;
Fig. 6 has the image sensor architecture synoptic diagram of dimmer arrangement and shade;
Fig. 7 is the information flow block diagram of control module;
Fig. 8 is the synoptic diagram of the heliostat calibration system of embodiment 2;
Fig. 9 is the synoptic diagram of the heliostat calibration system of embodiment 3;
Figure 10 is the synoptic diagram of the heliostat calibration system of embodiment 4.
Reference numeral is expressed as among the figure:
1-receiver 2-heliostat 3-imageing sensor 4-mounting bracket 5-dimmer arrangement 6-sunshine light source 7-mounting bracket 8-rotation mounting bracket 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 will combine accompanying drawing, and use following examples that the present invention is further set forth.
Shown in Figure 2 is the heliostat calibration system of solar power plant, and it comprises a receiver 1 that is installed on the support tower 9, the sunshine that said receiver 1 receives heliostat 2 reflections with direct generation steam or; Said receiver 1 guarantees that apart from the height on ground the heliostat 2 in the said heliostat field all can reflex on the said receiver 1.
Also mounted on the periphery of the receiver field of heliostats; said at least one field of heliostats comprises heliostat 2; said heliostat 2 configured with two rotary shaft 2 around the heliostat pitching rotation of the rotating shaft, flat pan rotation; said pair of rotary axis with angle sensor for accurate determination of the actual two rotary axes turned pitch angle
and panning angle ω.Said heliostat 2 is through adjusting the minute surface orientation to follow the tracks of the mobile sun, so that sunshine is continued to reflex on the receiver 1.
And being used to catch the imageing sensor group that regulation light source is radiated at the flare on the heliostat 2, said imageing sensor group comprises at least one imageing sensor 3.The image acquisition scope of said imageing sensor 3 is greater than the reflected range of said heliostat field.It gathers the flare that does not shine the heliostat on the receiver 1.Regulation light source in the present embodiment is a sunshine light source 6.As another kind of embodiment, this regulation light source can also be artificial light source, and said artificial light source can be arranged on said receiver 1 or the imageing sensor 3.
Said imageing sensor 3 is for being installed on the video camera on the mounting bracket 4 between said receiver 1 and the said heliostat field.As shown in Figure 4, said imageing sensor component is a, b; C, the d4 group, 4 picture group image-position sensors are around the circumferential setting of said receiver 1; And the collection face of said imageing sensor 3 is provided with towards said receiver 1, and 4 picture group image-position sensors move up and down along mounting bracket 4 respectively.A, b, c, the heliostat in corresponding respectively 3,4,1,2 four zones of four groups of sensors of d.Through moving respectively of 4 imageing sensor groups the heliostat in four zones is calibrated.When imageing sensor moves; Through the imageing sensor on the said receiver 1 owing to receive blocking of receiver 1; Can not collect the hot spot that shines the heliostat on the receiver 1, imageing sensor 3 can only collect the heliostat flare that does not shine on the receiver 1.In the present embodiment, said imageing sensor configuration set is useful on the dimmer arrangement 5 that weakens light intensity; This dimmer arrangement 5 is the combination of the absorption plant of reflection of light device and light, is used to protect the imageing sensor group not influenced by high light.The dim light degree of the dimmer arrangement 5 in the present embodiment is variable; As shown in Figure 5; Said dimmer arrangement 5 comprises a dim light disk 51; It is arranged at said imageing sensor 3 fronts, along the circumferential direction is divided into 6, and every light extinction rate is different; Light intensity sensor 13 detects light intensity when strong; Control motor 14 turns to high one of light extinction rate with this dimmer arrangement 5, and light intensity sensor 13 detects light intensity when more weak, and control motor 14 turns to low one of light extinction rate with this dimmer arrangement 5.
Preferred, a shade 52 coaxial with dim light disk 51 can also be set, as shown in Figure 6 before said dim light disk 51.Said shade 52 is provided with a light hole, allows all sunshines to pass through, and other parts are covered all sunlight.During work, drive this shade 52 through motor 14 ' and rotate continuously, asynchronous with dim light disk 51, when light hole and image sensor alignment, imageing sensor is accomplished and is gathered.This shade 52 can reduce the time shutter, further reduces the influence of high light to imageing sensor.
Said imageing sensor group also disposes cooling device 15, and said cooling device is air-cooled or water cooling plant, and this cooling device is used to avoid the imageing sensor thermal radiation at process receiver place and damages.
Said calibration system also comprises looks day tracking transducer 12, and it is used for the real-time follow-up position of sun and obtains the sunray vector.
Said calibration system also comprises the position transducer that is installed on the said imageing sensor group moving track, is used for confirming the position of receiver and imageing sensor.
This calibration system also comprises control module.As shown in Figure 7; The heliostat image information that said control module acceptance pattern image-position sensor group is gathered; Imageing sensor 3 positional informations that position transducer is gathered are looked the sunshine positional information that day tracking transducer 12 collects, and heliostat 2 rotation angle information of angular transducer collection; And the rotation of the mobile and heliostat 2 of control chart image-position sensor 3.Controlling said heliostat 2 at said control module rotates; When making the flare aligning receiver of said heliostat; Said imageing sensor group 3 is gathered the image that does not shine the heliostat flare on the receiver 1; The image information that said control module is gathered according to the imageing sensor group; Confirm the spot center position of said heliostat 2 reflections, and the heliostat 2 of not aiming at receiver 1 is calibrated.
Said control module obtains the spot center position that said heliostat reflects through moving continuously of imageing sensor group.When serialization graph image-position sensor group time spent 30t from an end uniform motion of guide rail behind the other end, can obtain X-Y scheme shown in Figure 3, it reflects the situation that can capture the imageing sensor of flare in the whole time period.Scheme just can release the locus at flare center, the i.e. position of form center of hot spot figure according to this.
Said calibration system installed on the rotating shaft heliostat heliostat angle sensor to obtain the rotation angle, that is, by the pitch angle
panning angle ω information, and then come to the heliostat required calibration error.Among them, the heliostat pitch angle
heliostats around the axis parallel to the horizontal rotation angle of the heliostat panning angle ω of the heliostats around an axis perpendicular to the horizontal rotation angle.
When heliostat is calibrated, at first need to confirm the error of calibration, need the error of calibration to be in the present embodiment: the angle of pitch and yawing angle
The non-perpendicular degree η of two turning axles
0, heliostat minute surface center o the locus (x, y, z), and three Euler's corner (α of the relative global coordinate system of heliostat self coordinate system
0, β
0, γ
0).In other embodiment, can also introduce more error parameter, to improve calibration accuracy.
Among them, the pitch angle of the heliostat
heliostats around the axis parallel to the horizontal rotation angle of the heliostat panning angle ω with the heliostats around a horizontal axis perpendicular to the rotation angle, the center of the heliostat heliostat mirror to the center position coordinates (x, y, z), axis of rotation error of the two non-vertical rotation axis actual angle value.Euler's corner (α
0, β
0, γ
0) be the drift angle of heliostat self coordinate system with respect to three coordinate axis of global coordinate system.
According to the error of required calibration, the calibration steps of this heliostat calibration system may further comprise the steps:
A. control module is controlled said heliostat rotation, makes the flare of said heliostat aim at receiver;
B. the imageing sensor group is moved by receiver top to receiver bottom for the first time; Said imageing sensor group detects the hot spot of heliostat reflection; Control module is confirmed the spot center position of the heliostat of misalignment receiver, obtains the angle of pitch and the yawing angle of said heliostat simultaneously;
C. control module is controlled the rotation of said heliostat, and making the flare of heliostat arrive said imageing sensor can detected position;
D. repeat step b-c 5 times, obtain the 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; Calculate the error amount of required calibration through the formula that calibrates for error: angle of pitch error; The yawing angle error is rotated center error and Euler's angular errors of non-perpendicular degree error, heliostat, and above-mentioned error amount is stored to said control module.
The above-mentioned formula that calibrates for error is:
Wherein, ω is a heliostat around yawing angle that turning axle rotates;
K is the spot center position coordinates;
O is a heliostat minute surface center position coordinates.
Among the step a, when the hot spot of said imageing sensor 3 collections was the part hot spot, control module was at first according to the part light spot profile that has obtained, reference area value A; Extrapolate corresponding heliostat, calculate area A 0 value of flare then according to the registered location of heliostat, drawing residue hot spot area value is A0-A, supplies the residue light spot profile through rectangle or polygonal mode.Finally calculate the part light spot profile and supply the geometric centroid of area addition figure, said control module is controlled said heliostat rotation, makes heliostat turn to whole hot spot and drops on the position that can be captured by the 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, calculate the error amount of required calibration through the formula that calibrates for error.
Shown in Figure 8 is the heliostat calibration system of present embodiment, and this calibration system is with the different of calibration system among the embodiment 1: the heliostat field in the present embodiment is positioned at a side of said receiver 1.Said imageing sensor group is fixedly installed on the mounting bracket 7 around the said receiver 1.Its acquisition range does not shine the heliostat flare on the receiver 1 for all.Said imageing sensor is uniformly distributed with arrangement on said mounting bracket 7, in the present embodiment, imageing sensor longitudinally and laterally is uniformly distributed with arrangement.
In the heliostat error hour, only need the angle of pitch peace cradle angle error of calibration heliostat to get final product.In this embodiment, the calibration error is required: the heliostat panning angle and the pitch angle
error, the heliostat calibration system calibration process includes the following steps:
A. control module is controlled said heliostat rotation, makes the flare of said heliostat aim at receiver;
B. the collection of imageing sensor group does not shine the heliostat image on the receiver, and control module is confirmed the spot center position of this heliostat, obtains the angle of pitch and the yawing angle of said heliostat simultaneously;
C. control module is controlled the rotation of said heliostat, and making the flare of heliostat arrive said imageing sensor can detected position;
D. according to above-mentioned 1 group of data, calculate the error amount of required calibration through embodiment 1 described calibration equation: angle of pitch error, the yawing angle error, and with the calibration error amount be stored to said control module.
Wherein, Euler's corner (α
0, β
0, γ
0) calibration error value, heliostat minute surface center o the locus (x, y, z) and the non-perpendicular degree η of two turning axles
0The calibration error value is called the storing value in the control module.
The 1 group of facula position data that calibration error in the present embodiment obtains through 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 and the yawing angular data of heliostat are tried to achieve.
Fig. 9 is the heliostat calibration system in the present embodiment; The calibration system basically identical of itself and embodiment 1; Its distinctive points is: said imageing sensor 3 can be installed on the rotation mounting bracket 8 up or down; Said imageing sensor 3 along continuous straight runs are arranged and its collection face is provided with towards said receiver 1, and said rotation mounting bracket 8 can rotate around the support tower 9 of said receiver.Said control module is through the spot center position that moves up and down and rotate the said heliostat reflection of acquisition of imageing sensor group.
Said heliostat disposes two turning axle X-axis, the Y-axis parallel with surface level, and said heliostat carries out pitch rotation around two said turning axles respectively; Said two turning axles are furnished with angular transducer respectively, are used for accurately measuring two luffing angles that turning axle turns over.
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 the locus (x, y, z), and three Euler's corner (α of the relative global coordinate system of heliostat self coordinate system
0, β
0, γ
0).The calibration process of this heliostat calibration system may further comprise the steps:
A. control module is controlled said heliostat rotation, makes the flare of said heliostat aim at receiver;
B. the imageing sensor group is moved by receiver top to receiver bottom after said 1/4 week of support tower rotation for the first time; Said imageing sensor group detects the hot spot of the heliostat reflection of its faces direction; Control module is confirmed the spot center position of the heliostat of misalignment receiver, obtains the angle of pitch and the yawing angle of said heliostat simultaneously;
C. said heliostat rotation in this zone of control module control, making the flare of heliostat arrive said imageing sensor can detected position;
D. repeat step a-b 9 times; Obtain 9 groups of data; Calculate the error amount of required calibration according to embodiment 1 described calibration equation: angle of pitch error; The yawing angle error; The non-perpendicular degree error of turning axle; And heliostat minute surface center o the locus error, and Euler's angular errors, and the error amount of calibration is stored to said control module.
Wherein, the above-mentioned formula that calibrates for error is:
Where,
is the heliostats around the X axis of the pitch angle;
K is the spot center position coordinates;
O is a heliostat minute surface center position coordinates.
Like this, realized this imageing sensor to the calibration of the heliostat in the zone; When needs are calibrated the heliostat of other directions, continue the said imageing sensor of rotation and repeat above-mentioned calibration steps.
Fig. 8 is the calibration system in the present embodiment; The calibration system basically identical of itself and embodiment 2; Its distinctive points is: the said imageing sensor 3 of present embodiment is installed on the Plane Installation support 10 between said heliostat field and the receiver 1; Said imageing sensor group is positioned at receiver 1 upside and downside respectively; And be positioned at receiver 1 left and right sides; Its equal along continuous straight runs is arranged, and moves up and down along said Plane Installation support 10.
In the present embodiment, the move mode of said imageing sensor group is for moving with certain hour intermittence at interval, and this move mode can obtain heliostat field flare when said imageing sensor group is stopped, and its image quality is high.Simultaneously, the intermittent light extinction rate that to adjust dimmer arrangement easily that moves.
The calibration steps of heliostat is consistent with the calibration steps among the embodiment 1 in the present embodiment.
Obviously, the foregoing description only be for explanation clearly done for example, and be not qualification to embodiment.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change.Here need not also can't give exhaustive to all embodiments.And conspicuous variation of being extended out thus or change still are among the protection domain of the invention.
Claims (19)
1. the heliostat calibration system of a solar power plant, it comprises:
Receiver (1), said receiver (1) are used to receive the sunshine of heliostat reflection;
The heliostat field that at least one heliostat (2) is formed: its be installed on said receiver around;
The imageing sensor group that at least one imageing sensor (3) is formed: the regulation light source reflected image that is used to gather heliostat;
And control module: be used to handle the image information that the imageing sensor group obtains, and the parameter of the heliostat of the calibration tracking sun is controlled the heliostat rotation simultaneously; It is characterized in that:
Said imageing sensor is arranged on the heliostat field, makes the reflected image that reflexes to the outer heliostat of said receiver (1) fall into the acquisition range of said imageing sensor group.
2. the heliostat calibration system of solar power plant according to claim 1 is characterized in that:
The regulation light source reflected image of the heliostat that said imageing sensor group collects is a spot, is used to obtain the profile of heliostat flare;
Controlling said heliostat (2) at said control module rotates; When making the flare aligning receiver of said heliostat; Said imageing sensor group (3) is gathered the image of said heliostat flare; The image information that said control module is gathered according to the imageing sensor group; Confirm the spot center position of said heliostat (2) reflection, and said heliostat (2) is calibrated.
3. the heliostat calibration system of solar power plant according to claim 1 and 2 is characterized in that:
Said imageing sensor (3) is installed on the mounting bracket (4) that is positioned between said receiver (1) and the said heliostat field movably; Said imageing sensor (3) is provided with towards said receiver (1) around circumferential and said imageing sensor (3) the collection face of said receiver (1), and it moves up and down along said mounting bracket (4).
4. the heliostat calibration system of solar power plant according to claim 1 and 2 is characterized in that:
Said imageing sensor (3) can be installed on the rotation mounting bracket (8) up or down; Said imageing sensor (3) along continuous straight runs is arranged and its collection face is provided with towards said receiver (1), and said rotation mounting bracket (8) can rotate around the support tower (9) of said receiver.
5. the heliostat calibration system of solar power plant according to claim 1 and 2 is characterized in that:
Said imageing sensor group and said heliostat field are installed on the relative both sides of said receiver (1) respectively; Said imageing sensor (3) is installed on the Plane Installation support (10) movably; Said imageing sensor group is arranged along level or vertical direction, and it along said Plane Installation support (10) up and down or move left and right.
6. the heliostat calibration system of solar power plant according to claim 1 and 2 is characterized in that:
The imageing sensor group is fixedly installed on the mounting bracket (7) that is positioned between said receiver (1) and the said heliostat, and said mounting bracket (7) is around the receiving plane setting of said receiver (1).
7. according to the heliostat calibration system of the arbitrary described solar power plant of claim 1-6, it is characterized in that:
Said imageing sensor configuration set is useful on the dimmer arrangement (5) that weakens light intensity, and said dimmer arrangement (5) comprises the absorption plant of reflection of light device and/or light.
8. the heliostat calibration system of solar power plant according to claim 7 is characterized in that:
Said dimmer arrangement is the dimmer arrangement (5) of adjustable dim light intensity.
9. according to the heliostat calibration system of the arbitrary described solar power plant of claim 1-8, it is characterized in that:
Said imageing sensor configuration set is useful on the shade (52) that keeps the sun off.
10. according to the heliostat calibration system of the arbitrary described solar power plant of claim 1-9, it is characterized in that:
Said imageing sensor configuration set is useful on the light intensity sensor (13) of measuring light intensity.
11. the heliostat calibration system according to the arbitrary described solar power plant of claim 1-10 is characterized in that:
Said imageing sensor assembly is equipped with cooling device, and said cooling device is air-cooled or water cooling plant.
12. the heliostat calibration system according to the arbitrary described solar power plant of claim 1-11 is characterized in that:
Said heliostat disposes two turning axles, and said heliostat carries out pitch rotation and yawing rotation around said turning axle; Said bispin rotating shaft is furnished with angular transducer, is used for accurately measuring two actual angles that turning axle turns over.
13. the heliostat calibration system according to the arbitrary described solar power plant of claim 1-11 is characterized in that:
Said heliostat disposes two turning axles, and said heliostat carries out pitch rotation around two said turning axles respectively; Said bispin rotating shaft is furnished with angular transducer, is used for accurately measuring two actual angles that turning axle turns over.
14. the heliostat calibration system according to the arbitrary described solar power plant of claim 1-13 is characterized in that:
Said calibration system also comprises looks a day tracking transducer (12), and it is used for the real-time follow-up position of sun.
15. the heliostat calibration system according to the arbitrary described solar power plant of claim 1-14 is characterized in that:
Said calibration system also comprises the position transducer that is installed on the said imageing sensor group moving track, is used for confirming the position of receiver and imageing sensor.
16. the heliostat calibration system according to the arbitrary described solar power plant of claim 1-15 is characterized in that:
Said regulation light source is sunshine light source (6) or artificial light source.
17. an application rights requires the calibration steps of the heliostat calibration system of the arbitrary described solar power plant of 1-16, it is characterized in that: may further comprise the steps:
A. control module is controlled said heliostat rotation, makes the flare of said heliostat aim at receiver;
B. the imageing sensor group is gathered the reflected image of heliostat; Said control module is confirmed the spot center position of heliostat reflection and the heliostat of correspondence according to the image of said imageing sensor group collection, and obtains the said heliostat anglec of rotation through the measured value of said angular transducer or the order of control module;
C. control module is controlled the rotation of said heliostat, and making the flare of heliostat arrive said imageing sensor can detected position;
D. as required the calibration the error amount number n, repeating step b-c n/2 time at least;
E. according to the spot center position that obtains and the rotation angle information of heliostat, calculate the error amount of required calibration, and the error amount of calibration is stored to said control module.
18. the heliostat calibration steps of tower receiver solar according to claim 17 power house is characterized in that:
The described imageing sensor group of step b is gathered the reflected image of heliostat through the mode that moves up and down or move left and right or rotation are moved, and makes the reflected image that reflexes to the outer heliostat of said receiver (1) fall into the acquisition range of said imageing sensor group.
19. the method for tracing of the heliostat calibration system of solar power plant according to claim 17; It is characterized in that: when the hot spot of the collection of imageing sensor described in the step b is the part hot spot; Said control module is controlled the rotation of said heliostat, makes whole hot spot drop on the position that can be captured by the 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 true CN102354226A (en) | 2012-02-15 |
| CN102354226B CN102354226B (en) | 2014-09-24 |
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| WO (1) | WO2013044849A1 (en) |
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| WO2013044849A1 (en) * | 2011-09-29 | 2013-04-04 | Sun Haixiang | Heliostat calibration system and calibration method of solar power station |
| CN108413987A (en) * | 2018-03-13 | 2018-08-17 | 深圳东康前海新能源有限公司 | A kind of calibration method of heliostat, apparatus and system |
| CN109813754A (en) * | 2019-02-14 | 2019-05-28 | 浙江中控太阳能技术有限公司 | A kind of System and method for of measurement and optimization heat dump cut-off efficiency |
| CN117664534A (en) * | 2024-01-31 | 2024-03-08 | 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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| CN105022410B (en) * | 2015-05-07 | 2018-03-20 | 浙江中控太阳能技术有限公司 | A kind of tower type solar electricity generation system heliostat calibaration system and calibration method |
| 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 |
| US11009263B2 (en) * | 2019-02-25 | 2021-05-18 | Karl von Kries | Systems and methods for altering rotation of a solar rotational manufacturing system |
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| Publication number | Publication date |
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| CN102354226B (en) | 2014-09-24 |
| WO2013044849A1 (en) | 2013-04-04 |
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