CN101943915A - Sunlight reflector closed-loop control system based on reference mirror and method thereof - Google Patents
Sunlight reflector closed-loop control system based on reference mirror and method thereof Download PDFInfo
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- CN101943915A CN101943915A CN 201010214185 CN201010214185A CN101943915A CN 101943915 A CN101943915 A CN 101943915A CN 201010214185 CN201010214185 CN 201010214185 CN 201010214185 A CN201010214185 A CN 201010214185A CN 101943915 A CN101943915 A CN 101943915A
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Abstract
The invention discloses a sunlight reflector closed-loop control system based on reference mirror, comprising a sunlight energy collector arranged at the top of a high tower, a plurality of sunlight reflectors paved on the ground around the high tower, reference mirrors corresponding to the sunlight reflectors one by one, a plurality of photoelectric trackers corresponding to the reference mirrors one by one, and control computer subsystems, wherein each sunlight reflector is provided with a support mechanism for supporting the sunlight reflector and an electromechanical rotation device; the control computer subsystems control the rotation of corresponding electromechanical rotation devices to adjust the azimuth angle and the altitude angle of the sunlight reflector after knowing that the reference mirror reflects the imaging position information of the light on corresponding photoelectric tracker so as to make the sunlight reflected by the sunlight reflector fall on the sunlight energy collector. The invention overcomes the problems of high cost and complicated technology in the traditional open-loop control method and the industry technical prejudice of barely detecting the position of the light spot on the sunlight energy collector in the closed-loop control.
Description
Technical field
The present invention relates to solar energy and collect and utilize technical field, be specifically related to a kind of system and method for the heliostat closed-loop control based on the reference mirror.
Background technology
Along with economy and industrial development, more and more to the demand of the energy, especially electric energy is the indispensable energy in industry and the people's life.The tradition generation mode, for example, the coal generating is because of too strong to the colliery dependence, and coal is that non-renewable resources and pollution are bigger, traditional power generation modes such as coal generating can not satisfy industry and needs of economic development.For this reason, cleaning, the reproducible energy more and more are subjected to people and pay attention to, and in numerous clean energy resourcies, and sun power is because of its broad covered area, promptly have the place of sunlight to utilize and occupy more important role, thereby be widely used in generating and the heating field.Collect and utilize in the system at solar energy, tower solar energy gatherer is wherein a kind of important mode.
Tower solar energy collection system comprises around the solar energy gatherer that is placed on the high tower (also can claim to receive tower), the high tower that the upper berth, ground establishes thousands of so that tens thousand of level crossing, computer control subsystem and tracking drive mechanism.These level crossings are referred to as heliostat.Computer control subsystem controls heliostat is from the motion tracking sun, and the light of the sun reflexed to is positioned at the solar energy gatherer that receives top of tower.Utilize thousands of to make medium boiling wherein so that tens thousand of heliostat focuses on solar radiant energy on the solar energy gatherer that places the reception top of tower, the steam that is produced drives turbodynamo thus, and then realizes the effect of generating; Or utilize the medium of boiling to heat other raw material of industry; Maybe give domestic heating with the heat that produces.Therefore, when track of sun changed along with the time, accurately controll day light reflection mirror rotational angle following the tracks of the variation of the sun, thereby realize efficient utilization to solar energy resources.
The control method of heliostat track mainly contains following several in the present tower solar energy collection system:
First kind is open loop control: the position (elevation angle and the position angle that comprise the sun) that control computer calculates the sun according to the geography information of locality and fixed time, calculate again sunray is reflexed on the solar energy gatherer all the time, the angle that heliostat should rotate around diaxon (elevation angle and position angle) realizes the tracking of heliostat to the sun by driving dynamo-electric wheelwork at last.This method requires to use high precision and expensive dynamo-electric wheelwork, and, have no idea to overcome modeling error, dynamo-electric wheelwork error and other interference in the track of sun calculating, therefore, the control that hot spot on the solar energy gatherer is distributed is difficult to reach best.
Second kind is to adopt open loop control, the method of regular calibration: the same with above-mentioned open loop control, also be according to the geography information of locality and the sunny position of Time Calculation of appointment, calculate heliostat again and follow the tracks of the angle that the sun should rotate around diaxon, realize the tracking of heliostat by driving dynamo-electric wheelwork at last the sun.But, in the method for this kind regular calibration,, adopted the photographing imaging technology in order to overcome the track of sun error of calculation, the dynamo-electric wheelwork error that exists in the open loop control, regularly a heliostat of appointment is proofreaied and correct.
Concrete grammar is: adjust the angle of this piece heliostat that needs correction, make its align cameras, take the photo of this moment, the method that adopts image to set calculates the situation of imaging, and this piece heliostat is carried out error correction.This kind method need increase photographic system in the heliostat field of tower solar energy collection system, the imaging situation that also needs further photograph to be obtained is carried out image and is set, and, once can only proofread and correct a heliostat, for a large-scale tower solar energy collection system, thousands of mirror is arranged, therefore, exist cost higher, the problem of technical sophistication.
The third is the method for closed-loop control, its scheme is: by detecting the deviation of heliostat between the facula position of the position of hot spot on the solar energy gatherer and setting, further adjust the diaxon rotational angle of heliostat, arrive the setting requirement up to the facula position of heliostat on the solar energy gatherer, such control procedure claims the closed-loop control of heliostat.
The method of closed-loop control is the development trend of heliostat control in this kind mode, seldom use but utilize in the system at present commercial solar energy, reason mainly exist following some:
One, because the hot spot of thousands of heliostats is arranged on the solar energy gatherer simultaneously, therefore, can't measure at solar energy gatherer facula position an independent heliostat.
Two, in order to realize closed-loop control, need on every heliostat, measure the position of hot spot indirectly by increasing other complicated electromechanical assembly or complicated photodetector system, must increase cost of investment and operating cost, influence the utilization ratio of solar energy.
Therefore, to the control method of heliostat, mainly there is following defective in the prior art:
The first, in open-loop control method, can't overcome in the modeling and in the dynamo-electric wheelwork to the error of heliostat hot spot on the solar energy gatherer, perhaps to adopting the higher and technical sophistication of camera technique cost in the hot spot control;
The second, in traditional closed loop control method, too complicated to hot spot position detecting device on the solar energy gatherer, cost is higher.
Summary of the invention
At above-mentioned defective, the system that the purpose of this invention is to provide a kind of heliostat closed-loop control based on the reference mirror, with solve open loop control in the prior art can't overcome in the modeling and in the dynamo-electric wheelwork to the error of heliostat hot spot on receiver, perhaps to adopting the higher and technical sophistication of camera technique cost in the hot spot control, and in closed loop control method, the technical matters that is difficult to realize arranged to solar energy gatherer glazing plate position detecting device is too complicated.
Another object of the present invention provides a kind of method of the heliostat closed-loop control based on the reference mirror, with solve open loop control in the prior art can't overcome in the modeling and in the dynamo-electric wheelwork to the error of heliostat hot spot on receiver, perhaps to adopting the higher and technical sophistication of camera technique cost in the hot spot control, and in closed loop control method, the technical matters that is difficult to realize arranged to hot spot position detecting device on the solar energy gatherer is too complicated.
For achieving the above object, the present invention has adopted following technical scheme:
A kind of heliostat closed-loop control system based on the reference mirror, comprise: be arranged on some heliostats that establish on the upper berth, ground around solar energy gatherer of high column overhead and the high tower, and, be provided for supporting the supporting mechanism of this heliostat and in order to drive the dynamo-electric wheelwork that this heliostat rotates at each heliostat, native system also comprises: some with reference to mirror, each is with reference to the corresponding heliostat of mirror, and each is arranged on the same supporting mechanism on ground with corresponding heliostat with reference to mirror, and this normal with reference to mirror is parallel with this heliostat; Some photoelectric tracers, each photoelectric tracer correspondence one are with reference to mirror, and those photoelectric tracers and this solar energy gatherer are in same plane, in order to receive corresponding sunray with reference to mirror reflection; The control computer subsystem, connect those photoelectric tracers and those dynamo-electric wheelworks, be used to know the image space information of reflection ray on corresponding photoelectric tracer with reference to mirror, the position angle and the elevation angle of corresponding heliostat adjusted in the rotation of the dynamo-electric wheelwork that control afterwards is corresponding, so that the sunshine of this sun reflection mirror reflection drops on the described solar energy gatherer.
According to the described heliostat closed-loop control system of preferred embodiment of the present invention, be provided with a plurality of light sensors on each photoelectric tracer, those light sensor uniform arrays are arranged based on the reference mirror.
According to the described heliostat closed-loop control system based on the reference mirror of preferred embodiment of the present invention, described control computer subsystem is by the definite information with reference to mirror reflection light of the light sensor that detects current hot spot position correspondence.
According to the described heliostat closed-loop control system based on the reference mirror of preferred embodiment of the present invention, described control computer subsystem further comprises storer and processor, and storer further comprises:
Heliostat information memory cell: be used to store the supporting mechanism information that is used to support this heliostat of each heliostat correspondence, in order to drive dynamo-electric wheelwork information that this heliostat rotates, corresponding with this heliostat with reference to mirror information and photoelectric tracer information;
The image space information memory cell is used to store the arrange information of each light sensor on corresponding photoelectric tracer;
Processor: be used to know the image space information of reflection ray on corresponding photoelectric tracer with reference to mirror, the position angle and the elevation angle of corresponding heliostat are adjusted in the rotation of the dynamo-electric wheelwork that back control is corresponding.
According to the described heliostat closed-loop control system of preferred embodiment of the present invention, also comprise based on the reference mirror:
The adjustment information storage unit is used to store with reference to the numerical value of light its central point of position deviation of imaging on photoelectric tracer of mirror reflection and the corresponding informance that heliostat needs the turned position.
According to the described heliostat closed-loop control system based on the reference mirror of preferred embodiment of the present invention, described control computer subsystem also comprises:
Regularly detecting unit detects with reference to the image-forming information of mirror reflection light on photoelectric tracer in order to timing, and control is opened with reference to mirror.
The present invention provides a kind of heliostat closed loop control method based on the reference mirror again, be applied in the heliostat closed-loop control system, described system comprises some heliostats that establish on the upper berth, ground around the solar energy gatherer that is arranged on high column overhead and the high tower, and, be provided for supporting the supporting mechanism of this heliostat and in order to drive the dynamo-electric wheelwork that this heliostat rotates at each heliostat, comprise: provide some with reference to mirror, described corresponding one by one with heliostat with reference to mirror, and those with reference to mirror respectively with the normal parallel of corresponding heliostat; Some photoelectric tracers and control computer subsystem are provided, and those photoelectric tracers are arranged on high column overhead with described corresponding one by one with reference to mirror, and light receiving surface and solar energy gatherer are in same plane; Timing of control computer subsystem or detection trigger are with reference to the position of light on photoelectric tracer of mirror reflection; The control computer subsystem is positioned at the position of the required adjustment of solar energy gatherer fully according to monitoring result light reflection mirror on controll day reflection ray; The control computer subsystem sends a command to corresponding dynamo-electric rotating mechanism, rotates respective angles with heliostat with reference to mirror.
According to the described heliostat closed loop control method of preferred embodiment of the present invention based on the reference mirror, also comprise: the control computer subsystem is searched the corresponding informance with reference to mirror reflection hot spot image space and dynamo-electric wheelwork turned position that prestores, and controls described dynamo-electric wheelwork and rotate corresponding angle.
According to the described heliostat closed loop control method of preferred embodiment of the present invention based on the reference mirror, also comprise: control computer subsystem basis is calculated the angle that dynamo-electric wheelwork need rotate from reference mirror reflection hot spot image space by default computing formula, and controls described dynamo-electric wheelwork and rotate corresponding angle.
Owing to adopted above technical scheme, made the present invention have following advantage and good effect than prior art:
First, what employing of the present invention was corresponding with heliostat is object of reference with reference to mirror, be in light the facula position on photoelectric tracer of conplane photoelectric tracer tracking by the reference mirror with the solar energy gatherer with reference to mirror reflection, judge the facula position of light on the solar energy gatherer of sun reflection mirror reflection, and timing detects the hot spot departure degree, so that in time adjust the heliostat rotating shaft, make the light of sun reflection mirror reflection be in all the time on the solar energy gatherer, it is higher to have overcome in traditional open-loop control method cost, the problem of technical sophistication;
Second, setting of the present invention and heliostat normal parallel little with reference to mirror as a reference, but and by photoelectric tracer detect solar simulated mirror reflects light to receiver with reference to the facula position of mirror on photoelectric tracer, detect the elevation angle and the position angle of the relative sun of heliostat, having overcome industry can only Direct-detection Optical spot position on receiver in closed-loop control, almost irrealizable technology prejudice;
The 3rd, the present invention is only corresponding to mirror by each heliostat is provided with, and corresponding photoelectric tracer of solar energy gatherer, can realize accurate detection to heliostat, and adjust in real time, need not the photographic system in the open loop control, cost is lower, has very strong practicality.
Description of drawings
Fig. 1 is the synoptic diagram of closed-loop control system of the present invention;
Fig. 2 is a heliostat of the present invention and with reference to the synoptic diagram of mirror one embodiment;
Fig. 3 is the synoptic diagram of an embodiment of photoelectric tracer of the present invention;
Fig. 4 is the structured flowchart of an embodiment of the control computer subsystem among the present invention;
Fig. 5 is the structured flowchart of second embodiment of the control computer subsystem among the present invention;
Fig. 6 is the structured flowchart of the 3rd embodiment of the control computer subsystem among the present invention;
Fig. 7 be heliostat of the present invention and with reference to the mirror identical degree the corresponding synoptic diagram of reflection ray photoimaging when best;
Fig. 8 is a heliostat of the present invention and with reference to the corresponding synoptic diagram of mirror imaging when elevation angle has error;
Fig. 9 is the corresponding synoptic diagram of heliostat of the present invention and imaging when at the position angle error being arranged with reference to mirror;
Figure 10 is a heliostat of the present invention and with reference to the corresponding synoptic diagram of mirror imaging when all there is error at elevation angle and position angle;
Figure 11 is the process flow diagram of a kind of heliostat closed loop control method based on the reference mirror provided by the invention.
Embodiment
Below in conjunction with accompanying drawing several preferred embodiments of the present invention is described in detail, but the present invention is not restricted to these embodiment.The present invention contain any on marrow of the present invention and scope, make substitute, modification, equivalent method and scheme.Understand for the public is had completely the present invention, in the following preferred embodiment of the present invention, describe concrete details in detail, and do not have the description of these details also can understand the present invention fully for a person skilled in the art.
Core concept of the present invention is: give each heliostat be provided with a correspondence with reference to mirror, and give the solar energy gatherer of heliostat correspondence, be provided with reference to mirror photoelectric tracer one to one, photoelectric tracer detects position and the drift condition with reference to sunray hot spot on photoelectric tracer of mirror reflection, the control computer subsystem is according to heliostat with reference to the corresponding relation between the mirror, the angle of corresponding adjustment heliostat, thus the light of realizing the sun reflection mirror reflection always is positioned at the solar energy gatherer.
Below in conjunction with accompanying drawing,, do being described in further detail to preferred embodiment of the present invention.
Embodiment one
Please refer to Fig. 1, for the present invention is based on synoptic diagram with reference to the heliostat closed-loop control system of mirror, it comprises, control computer subsystem 6, be arranged on the solar energy gatherer 3 that is used for receiving light of high column overhead, the photoelectric tracer 4 corresponding and be arranged on the heliostat 1 that is used for sunlight reflection on ground with solar energy gatherer 3, with heliostat 1 one to one with reference to mirror 2, be used to support the supporting mechanism 5 of heliostat, and the dynamo-electric wheelwork (not illustrating among the figure) that under the control of control computer subsystem 6, drives heliostat 1 rotation corresponding angle.
For further understanding the present invention, below the several important among the present invention done be described in further detail.
Please refer to Fig. 2, for the heliostat among the present invention 1 with reference to the synoptic diagram of mirror 2, heliostat 1 is common heliostat, and be that area is than heliostat 1 little a lot of mirror with reference to mirror 2, heliostat 1 and with reference to mirror 2 one by one correspondence be installed on the supporting mechanism 5, can dynamo-electric wheelwork the control of (for example stepper motor and rotating shaft combination) adjust its position angle and elevation angle down.Heliostat 1 is used for sunray is reflexed on the solar energy gatherer 3, then sunray is reflexed on the photoelectric tracer 4 with reference to mirror 2.
When mounted, need be installed in same supporting mechanism 5 with heliostat 1 with reference to mirror 2, regulate both positions, best state is that to be adjusted to both normal parallel fully, promptly identical with reference to the elevation angle and the position angle of mirror 2 and heliostat 1, when reaching this state, heliostat 1 and with reference to the reflection ray imaging of 2 pairs of sun of mirror just in the center of solar energy gatherer 3 and photoelectric tracer 4.
But in fact, be difficult to when mounted both identical degrees are reached best, therefore need constantly finely tune,, combine position angle and the elevation angle of adjustment with reference to mirror 2 for this reason with reference to being provided with screw 21 and screw 22 on the mirror 2 to both relative positions.And, when dispatching from the factory, need identify and proofread and correct, and both character pair data are kept in the control computer subsystem 6 reference mirror 2 and heliostat 1.
Please refer to Fig. 3, it is the synoptic diagram of a kind of embodiment of the photoelectric tracer among the present invention, array evenly is provided with a plurality of light sensors 41 on the photoelectric tracer 4, can detect the imaging situation of light on photoelectric tracer 4, light sensor 41 is even at interval on the flat board of photoelectric tracer 4, and preferred forms is that ranks are arranged, to realize that receipts are missed in the nothing left of hot spot thereon.Light sensor 41 is connected to control computer subsystem 6, detected photoimaging information can be real-time transmitted to control computer 6.For example, can set up digital coordinates system on photoelectric tracer 4, the different different coordinates of light sensor 41 correspondences when hot spot drops on the corresponding light sensor 41, can be learnt the position coordinates of imaging this moment.
Please refer to Fig. 4, control computer subsystem 6 mainly comprises storer 61 and processor 62 as the control core of system, and wherein storer 61 further comprises:
Heliostat information memory cell 611: be used to store the supporting mechanism information that is used to support this heliostat 1 of each heliostat 1 correspondence, in order to drive dynamo-electric wheelwork information that this heliostat 1 rotates, corresponding with this heliostat with reference to mirror 2 information and photoelectric tracer 4 information.For example be numbered the numbering of the numbering with reference to mirror of the heliostat correspondence of a certain numerical value, corresponding supporting mechanism, numbering of corresponding solar energy gatherer or the like.
Image space information memory cell 612 is used to store the arrange information of each light sensor 41 on corresponding photoelectric tracer 4.For example set up coordinate system, a coordinate points on each light sensor 41 corresponding photoelectric tracer 4 like this, when hot spot drops on the light sensor 41, is promptly learnt its coordinate figure.
Adjustment information storage unit 613, be used to store the corresponding informance that needs the turned position with reference to the numerical value heliostat 1 corresponding of light its central point of position deviation of imaging on photoelectric tracer 4 of mirror 2 reflections with it, for example, when the position of light on photoelectric tracer 4 of reference mirror reflection at its central point+e of elevation angle deviation in driction
yThe time (regulation off-center point top for just, the below is to bear), adjusting dynamo-electric wheelwork value corresponding is Y.And store the corresponding numerical value of many groups in the tabulation mode simultaneously, when needed, only need remove to inquire about corresponding number list and get final product.
Processor 62: be used to know the image space information of reflection ray on corresponding photoelectric tracer 4 with reference to mirror 2, the position angle and the elevation angle of corresponding heliostat 1 are adjusted in the rotation of the dynamo-electric wheelwork that back control is corresponding.
Can also comprise regularly detecting unit 63 in the present embodiment, detect with reference to the image-forming information of mirror 2 reflection rays on photoelectric tracer 4, and control is opened with reference to mirror 2 in order to timing.Regularly detecting unit 63 can be software, also can be the timer of hardware, the perhaps external timer that is connected to the control computer subsystem.Cooperate with processor 62, set time control is opened with reference to mirror 2, and after one-time detection finishes, promptly closes with reference to mirror 2.
Certainly, also can not adopt the mode that regularly detects, and use the mode that triggers control, only when needed, starting switch etc. are opened with reference to mirror, detect, and when not needing to detect, close with reference to mirror.
The application principle of present embodiment below is described, timing detecting unit 63, regularly open with Fixed Time Interval (for example 10 minutes) with reference to mirror 2, with reference to mirror 2 sunray is reflexed to a certain light sensor 41 on the photoelectric tracer 4, at this moment, the control computer subsystem stores coordinate information in the image space information memory cell 612 into, at this moment, processor 62 inquires this heliostat 1 with reference to mirror 2 correspondences according to beginning according to heliostat information memory cell 611, inquire about the corresponding numerical value of storage in the adjustment information storage unit 613 then, send control command then and give dynamo-electric wheelwork, be controlled at the rotating shaft rotating certain angle on the supporting mechanism 5, thereby adjust the elevation angle and the position angle of heliostat.Afterwards, close, wait for next work period arriving with reference to mirror.
Embodiment two
Please refer to Fig. 5, the block diagram of second embodiment of control computer subsystem 6 of the present invention, be with the difference of embodiment one, in the control computer subsystem, the adjustment information storage unit is not set, but the computing formula that prestores therein, after can image-forming information position coordinates numerical value according to reference mirror 2, can calculate by the computing formula of storage in advance, draw the positional information that dynamo-electric wheelwork need rotate, then, send control command and give dynamo-electric wheelwork, corresponding position is promptly rotated in the rotating shaft on the supporting mechanism 5.
Embodiment three
Please refer to Fig. 6, is the block diagram of the 3rd embodiment of control computer subsystem of the present invention, has increased error compensation parameter unit 614 in the present embodiment.
Because, the embodiment of front is very good at the identical degree of reference mirror 2 and heliostat 1, i.e. ideal situation as shown in Figure 7, identical degree the best with reference to mirror 2 and heliostat 1, have identical elevation angle and position angle, heliostat 1 and then with reference to the sunray of the mirror 2 reflection center of imaging and solar energy gatherer 3 and photoelectric tracer 4 respectively, at this moment, with reference to the image formation by rays complete reaction of mirror 2 reflection the light of heliostat 1 reflection, adjusting the also simultaneously complete heliostat 1 that reacted of angle with reference to mirror 2 needs the angle adjusted.
But in fact, be difficult to accomplish the extraordinary situation of this identical degree, in the manufacturing of reference mirror, installation process, perhaps along with the time variation all error can occur, for example following several situations:
1, the situation that error is arranged with reference to the elevation angle of mirror and heliostat, as shown in Figure 8, when the imaging facula B of heliostat 2 is positioned at the center of solar energy gatherer 3 just, with reference to the imaging facula of mirror 2 center line ± Δ e at the position deviation photoelectric tracer 4 of photoelectric tracer 4
yAbove or below the expression elevation angle departs from, at this moment, need the side-play amount ± Δ e of verification elevation angle
yThe error that produces, when in the control computer subsystem, storing this error of compensation, my adjustment amount that need be on rotational angle, and be stored in the error compensation parameter unit 613.
When 2, on the position angle, error being arranged with reference to mirror and heliostat, as shown in Figure 9, owing to heliostat 1 with reference to mirror 2 position angles error is arranged, when heliostat 1 is imaged on the center B of solar energy gatherer 2, with reference to the imaging left avertence or the right avertence decentering position Δ e of mirror 2
xExpression, the imaging of sub-mirror is with off-center point usefulness ± Δ e
xRepresent.When therefore carrying out verification, write down its deviation size, the numerical value that needs are compensated is stored in the error compensation parameter unit 614.
3, when all there are error in elevation angle and position angle
Owing to heliostat 1 with reference to mirror 2 elevation angles and position angle error is arranged, when heliostat (female mirror) is imaged on heat dump center B, with reference to the imaging left avertence or the right avertence decentering position Δ e of mirror (sub-mirror)
xRepresent, will depart from the central point usefulness ± Δ e of photoelectric tracer 4 with reference to the imaging of mirror 2
xRepresent; With reference in the imaging of mirror 2 partially or under depart from photoelectric tracer 4 centers Δ e
yRepresent, will depart from the central point usefulness ± Δ e of photoelectric tracer 4 with reference to the imaging of mirror 2
yRepresent.Therefore must proofread and correct identical degree with reference to mirror 2 and heliostat 1.
When physics can be realized adjusting, promptly in Fig. 2, adjust, and make image error with reference to screw on the mirror 2 21 and screw 22
(Lx, Ly represent the length and the width of photoelectric tracer respectively).
And when the physics adjustment can't prove effective, then need error is compensated, and the parameter of compensation then is kept in the error compensation parameter unit 614 of control computer subsystem.
So at this moment, in the storer 61 of control computer subsystem 6, be provided with error compensation parameter unit 614, wherein stored and worked as the center of the reflection ray of heliostat at the solar energy gatherer, and with reference to the reflection ray of mirror not in the photoelectric tracer center, the parameter information that need compensate to the error that this kind situation produces.
In use, after processor detects the photoimaging information of this moment earlier, after calling the information of adjustment information storage unit 613, adopt the parameter information in the error compensation parameter unit to carry out corresponding compensation again, adjust angle and/or positional information that dynamo-electric wheelwork need be adjusted.
Please refer to Figure 11, the present invention provides a kind of closed loop control method based on said system in addition, be applied in the heliostat closed-loop control system, described system comprise the some heliostats that establish on the upper berth, ground around the solar energy gatherer that is arranged on high column overhead and the high tower and, be provided for supporting the supporting mechanism of this heliostat and, comprise the steps: at each heliostat in order to drive the dynamo-electric wheelwork that this heliostat rotates
S1101: provide some with reference to mirror;
Described corresponding one by one with heliostat with reference to mirror, and adjust with reference to the plane of mirror and the normal parallel of the heliostat of correspondence.
S1102: some photoelectric tracers and control computer subsystem are provided;
Photoelectric tracer is arranged on high column overhead with described corresponding one by one with reference to mirror, and light receiving surface and solar energy gatherer are in same plane;
Simultaneously with reference to the corresponding relation between mirror, middle line receiver and the photoelectric tracer, in the storer of the control computer subsystem of storage.
S1103: timing of control computer subsystem or detection trigger are with reference to the position of light on photoelectric tracer of mirror reflection;
S1104: the control computer subsystem is positioned at the position of the required adjustment of solar energy gatherer fully according to monitoring result light reflection mirror on controll day reflection ray;
This process can realize by following dual mode,
The first, the control computer subsystem is searched the corresponding informance with reference to mirror reflection hot spot image space and dynamo-electric wheelwork turned position that prestores, and controls described dynamo-electric wheelwork and rotate corresponding angle, perhaps
The second, control computer subsystem basis is calculated the angle that dynamo-electric wheelwork need rotate from reference mirror reflection hot spot image space by default computing formula, and controls described dynamo-electric wheelwork and rotate corresponding angle.
S1105: the control computer subsystem sends a command to corresponding dynamo-electric rotating mechanism, rotates respective angles with heliostat with reference to mirror.
Application examples one
Below introduce a kind of a kind of heliostat closed-loop control application of adopting system and method for the present invention.
According to the time (comprising year, month, day, hour, min, second) with according to the elevation angle γ that the geographic position calculates (comprising latitude and longitude) sun current time is that 50.11 degree and azimuth angle alpha are spent for-14.34, this moment, the regulation sun was zero degree when the due south, and is to the west for negative;
Overhead 40 meters of solar energy gatherer centers are set, the position of heliostat is the positive north of leaving 10 meters of the centers of solar energy gatherer, overhead 1.5 meters of installation sites, heliostat center, the elevation angle θ (k) that calculates the heliostat of this moment is 62.82 degree and position angles
Be-10.15 degree, this moment, dynamo-electric wheelwork (for example stepper motor) turned to corresponding angle with heliostat.
Send control command according to the aforementioned calculation result and wait for the heliostat release, whether situation about reading with reference to mirror imaging on photoelectric tracer meets the demands, and promptly the reflection ray of heliostat is on the solar energy gatherer.Arrive if then wait for first sense cycle, if not, then continue to adjust.
After initialization is finished 10 minutes, carrying out the first time detects, find this moment with reference to the imaging of mirror on photoelectric tracer in height off-center be-5cm, then control computer in its database, search side-play amount be-during 5cm, the angle value that its corresponding elevation angle should be adjusted.Drive dynamo-electric wheelwork, make heliostat and with reference to the mirror respective angles that rotates around the axis.
Then, hide, wait for that next sense cycle arrives with reference to mirror.
In sum, the present invention has following advantage and good effect than prior art:
First, what employing of the present invention was corresponding with heliostat is object of reference with reference to mirror, be in light the facula position on photoelectric tracer of conplane photoelectric tracer tracking by the reference mirror with receiver with reference to mirror reflection, judge the facula position of light on receiver of sun reflection mirror reflection, and timing detects the hot spot departure degree, so that in time adjust the heliostat rotating shaft, make the light of sun reflection mirror reflection be on the photelectric receiver all the time, it is higher to have overcome in traditional open-loop control method cost, the problem of technical sophistication;
Second, the present invention is arranged at the heliostat normal parallel little with reference to mirror as a reference, but and by photoelectric tracer detect solar simulated mirror reflects light to the solar energy gatherer with reference to the facula position of mirror on photoelectric tracer, detect the elevation angle and the position angle of the relative sun of heliostat, having overcome industry can only Direct-detection Optical spot position on the solar energy gatherer in closed-loop control, almost irrealizable technology prejudice;
The 3rd, the present invention is only corresponding to mirror by each heliostat is provided with, and corresponding photoelectric tracer of receiver, can realize accurate detection to heliostat, and adjust in real time, need not be as the photographic system in the open loop control, cost is lower, has very strong practicality.
The preferred embodiment of the present invention just is used for helping to set forth the present invention.Preferred embodiment does not have all details of detailed descriptionthe, does not limit this invention yet and only is described embodiment.Obviously, according to the content of this instructions, can make many modifications and variations.These embodiment are chosen and specifically described to this instructions, is in order to explain principle of the present invention and practical application better, thereby the technical field technician can utilize the present invention well under making.The present invention only is subjected to the restriction of claims and four corner and equivalent.
Claims (9)
1. heliostat closed-loop control system based on the reference mirror, comprise: be arranged on the some heliostats that establish on the upper berth, ground around solar energy gatherer of high column overhead and the high tower and, be provided for supporting the supporting mechanism of this heliostat and in order to drive the dynamo-electric wheelwork that this heliostat rotates at each heliostat, it is characterized in that native system also comprises:
Some with reference to mirror, each is with reference to the corresponding heliostat of mirror, and each is arranged on the same supporting mechanism on ground with corresponding heliostat with reference to mirror, and this normal with reference to mirror is parallel with this heliostat;
Some photoelectric tracers, each photoelectric tracer correspondence one are with reference to mirror, and those photoelectric tracers and this solar energy gatherer are in same plane, in order to receive corresponding sunray with reference to mirror reflection;
The control computer subsystem, connect those photoelectric tracers and those dynamo-electric wheelworks, be used to know the image space information of reflection ray on corresponding photoelectric tracer with reference to mirror, afterwards, the position angle and the elevation angle of corresponding heliostat adjusted in the rotation of the dynamo-electric wheelwork that control is corresponding, so that the sunshine of this sun reflection mirror reflection drops on the described solar energy gatherer.
2. the heliostat closed-loop control system based on the reference mirror as claimed in claim 1 is characterized in that, is provided with a plurality of light sensors on each photoelectric tracer, those light sensor uniform arrays are arranged.
3. the heliostat closed-loop control system based on the reference mirror as claimed in claim 2 is characterized in that, described control computer subsystem is by the definite information with reference to mirror reflection light of the light sensor that detects current hot spot position correspondence.
4. the heliostat closed-loop control system based on the reference mirror as claimed in claim 2 is characterized in that described control computer subsystem further comprises storer and processor, and storer further comprises:
Heliostat information memory cell: be used to store the supporting mechanism information that is used to support this heliostat of each heliostat correspondence, in order to drive dynamo-electric wheelwork information that this heliostat rotates, corresponding with this heliostat with reference to mirror information and photoelectric tracer information;
The image space information memory cell is used to store the arrange information of each light sensor on corresponding photoelectric tracer;
Processor: be used to know the image space information of reflection ray on corresponding photoelectric tracer with reference to mirror, the position angle and the elevation angle of corresponding heliostat are adjusted in the rotation of the dynamo-electric wheelwork that back control is corresponding.
5. as right 4 described heliostat closed-loop control systems, it is characterized in that, also comprise based on the reference mirror:
The adjustment information storage unit is used to store with reference to the numerical value of light its central point of position deviation of imaging on photoelectric tracer of mirror reflection and the corresponding informance that heliostat needs the turned position.
6. as claim 1 or 5 described heliostat closed-loop control systems based on the reference mirror, it is characterized in that, described control computer subsystem also comprises: the timing detecting unit, detect with reference to the image-forming information of mirror reflection light on photoelectric tracer in order to timing, and control is opened with reference to mirror.
7. heliostat closed loop control method based on the reference mirror, be applied in the heliostat closed-loop control system, described system comprise the some heliostats that establish on the upper berth, ground around the solar energy gatherer that is arranged on high column overhead and the high tower and, be provided for supporting the supporting mechanism of this heliostat and in order to drive the dynamo-electric wheelwork that this heliostat rotates at each heliostat, it is characterized in that, comprising:
Provide some with reference to mirror, described corresponding one by one with heliostat with reference to mirror, and those with reference to mirror respectively with the normal parallel of corresponding heliostat;
Some photoelectric tracers and control computer subsystem are provided, and those photoelectric tracers are arranged on high column overhead with described corresponding one by one with reference to mirror, and light receiving surface and solar energy gatherer are in same plane;
Timing of control computer subsystem or detection trigger are with reference to the position of light on photoelectric tracer of mirror reflection;
The control computer subsystem is positioned at the position of the required adjustment of solar energy gatherer fully according to monitoring result light reflection mirror on controll day reflection ray;
The control computer subsystem sends a command to corresponding dynamo-electric rotating mechanism, rotates respective angles with heliostat with reference to mirror.
8. the heliostat closed loop control method based on the reference mirror as claimed in claim 7, it is characterized in that, also comprise: the control computer subsystem is searched the corresponding informance with reference to mirror reflection hot spot image space and dynamo-electric wheelwork turned position that prestores, and controls described dynamo-electric wheelwork and rotate corresponding angle.
9. the heliostat closed loop control method based on the reference mirror as claimed in claim 7, it is characterized in that, also comprise: control computer subsystem basis is calculated the angle that dynamo-electric wheelwork need rotate from reference mirror reflection hot spot image space by default computing formula, and controls described dynamo-electric wheelwork and rotate corresponding angle.
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| CN2010102141858A CN101943915B (en) | 2010-06-29 | 2010-06-29 | Sunlight reflector closed-loop control system based on reference mirror and method thereof |
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| CN2010102141858A CN101943915B (en) | 2010-06-29 | 2010-06-29 | Sunlight reflector closed-loop control system based on reference mirror and method thereof |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445287A (en) * | 2011-09-16 | 2012-05-09 | 浙江中控太阳能技术有限公司 | System and method for measuring surface energy flux density |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4172443A (en) * | 1978-05-31 | 1979-10-30 | Sommer Warren T | Central receiver solar collector using analog coupling mirror control |
| JPH09105852A (en) * | 1995-10-12 | 1997-04-22 | Kankyocho Chokan | Sun tracking device |
| CN1550732A (en) * | 2003-05-06 | 2004-12-01 | ������������ʽ���� | Autonomous day light reflection device |
| JP2004362866A (en) * | 2003-06-03 | 2004-12-24 | Mitsui Eng & Shipbuild Co Ltd | Solar collector |
-
2010
- 2010-06-29 CN CN2010102141858A patent/CN101943915B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4172443A (en) * | 1978-05-31 | 1979-10-30 | Sommer Warren T | Central receiver solar collector using analog coupling mirror control |
| JPH09105852A (en) * | 1995-10-12 | 1997-04-22 | Kankyocho Chokan | Sun tracking device |
| CN1550732A (en) * | 2003-05-06 | 2004-12-01 | ������������ʽ���� | Autonomous day light reflection device |
| JP2004362866A (en) * | 2003-06-03 | 2004-12-24 | Mitsui Eng & Shipbuild Co Ltd | Solar collector |
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| CN102445287A (en) * | 2011-09-16 | 2012-05-09 | 浙江中控太阳能技术有限公司 | System and method for measuring surface energy flux density |
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| CN102778897B (en) * | 2012-07-03 | 2015-08-12 | 中天同圆太阳能高科技有限公司 | The tracking of solar tracking device and device |
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| CN103345261A (en) * | 2013-06-18 | 2013-10-09 | 华北电力大学 | Heliostat reflecting facula offset correction method |
| CN103345261B (en) * | 2013-06-18 | 2015-10-21 | 华北电力大学 | Heliostat flare deviation correction method |
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