CN102981513A - Sun identification device for photovoltaic power station - Google Patents
Sun identification device for photovoltaic power station Download PDFInfo
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- CN102981513A CN102981513A CN 201210481129 CN201210481129A CN102981513A CN 102981513 A CN102981513 A CN 102981513A CN 201210481129 CN201210481129 CN 201210481129 CN 201210481129 A CN201210481129 A CN 201210481129A CN 102981513 A CN102981513 A CN 102981513A
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- 238000010248 power generation Methods 0.000 claims description 14
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229910021417 amorphous silicon Inorganic materials 0.000 description 2
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Abstract
The invention relates to a sun identification device for a photovoltaic power station and belongs to the field of photovoltaic generation tracking systems. The device comprises a system computer provided with a module for positioning the sun by using a clock and a small double-shaft tracker controlled by the system computer, a small photovoltaic assembly is arranged on the small double-shaft tracker, an electric quantity detection device is arranged on the output of the small photovoltaic assembly and connected onto the system computer, the system computer first drives the small double-shaft tracker to perform primary position on the small photovoltaic assembly and collects electric quantity values on the electric quantity detection device, then the small double-shaft tracker drives the small photovoltaic assembly to move nearby the primary position, and the system computer collects electric quantity values at corresponding positions and selects the maximum electric quantity position as a new sun position for use of a large photovoltaic generating module after comparison with the electric quantity value at the primary position. The device is easy to popularize and apply to large photovoltaic generating modules.
Description
Technical field
The present invention relates to a kind of sun recognition device, particularly a kind of photovoltaic plant sun recognition device belongs to photovoltaic generation tracker field.
Background technology
It is one of following important clean electric power generation mode that photovoltaic generation is known as, although it can run into variety of issue in evolution, industry is still good to its prospect, the photovoltaic generation cost is one of Main Bottleneck of its extensive development and application of pharmacy, in order to reduce cost, industry has adopted various technical approach, as make the process modification in field, the raising of cell piece efficient, the technological means such as the attenuate of thickness, these means are conceived to reduce the cost of photovoltaic module, another kind of mode is to improve the generating efficiency of photovoltaic module, such as light collecting photovoltaic generating system, tracing type photovoltaic electricity generation system etc., wherein the tracing type photovoltaic system is because the hardware less investment, being convenient to the advantages such as realization is widely used in recent years, in the tracing type photovoltaic electricity generation system, the identification of position of sun is the most basis and the key link, if this system inaccurate can't the realization system maximization of generating, the position of sun recognition system of using at present has several modes, the firstth, the photosensitive device formula, this mode carries signal to controller by sensor after adopting photosensitive device direct detection sun light intensity, drive biaxial tracker by controller and realize that the variation of position angle and elevation angle comes tracking position of sun, this mode is simple in structure, highly sensitive, but its accuracy is high to the weather dependence, at wet weather, mist, larger error can appear in the dust storm situation, the scholar who has proposes a kind of flake recognition system, the image that this system utilizes image recognition technology to form from imageing sensor is sought bright spot as the foundation of location, this system works is simple, but need a large amount of computer image processing technologies, algorithm is complicated, technology and the accuracy requirement of cutting apart are all higher, equally also can be at wet weather, mist, certain error can appear in the dust storm situation, the simplest a kind of mode is the clock method of identification, this mode is installed the latitude in geographic position according to the photovoltaic generation module, rotate elevation angle and the position angle that Changing Pattern calculates position of sun according to the revolution between the earth and the sun and rotation, implant in the computing machine photovoltaic generation module is controlled, this method be to utilize solar physics and geography information to obtain the solar motion track, writing related software calculates, draw corresponding position of sun constantly, this mode does not need additionally to increase hardware device and drops into, but need to be for the error of calculation of the formula that calculates position of sun itself, accumulated error in the trueness error of physical construction and the whole tracing process is revised timely.Photovoltaic generation needs in the industry a kind of with low cost, simple position of sun recognition device at present.
Summary of the invention
The present invention is for providing a kind of photovoltaic plant sun recognition device.
Photovoltaic plant provided by the present invention sun recognition device, comprise system computer, in system computer, be provided with the module that the geographic latitude employing clock location position of sun on ground is installed according to the photovoltaic generation module, be provided with the small Twin-shaft tracker of system computer control, be provided with azimuth sensor and elevation angle sensor on the small Twin-shaft tracker, little photovoltaic module is arranged on the small Twin-shaft tracker, be provided with electric quantity detection apparatus in the little photovoltaic module output, electric quantity detection apparatus is connected on the system computer, small Twin-shaft tracker control module is set in the system computer, system computer at first drives little photovoltaic module to the position of sun according to the clock location that is arranged on the small Twin-shaft tracker and carries out one-time positioning, gather the electric weight numerical value of electric quantity detection apparatus, small Twin-shaft tracker control module drives little photovoltaic module and rotates in the elevation angle of one-time positioning position and ° angle, azimuthal ± 10 respectively, system computer constantly gather correspondence position electric quantity detection apparatus electric weight numerical value and compare with a station acquisition electric weight numerical value, select position corresponding to maximum electric weight numerical value to adopt for the large-sized photovoltaic power generation module group as new position of sun, the used single photovoltaic module of described little photovoltaic module and large-sized photovoltaic power generation module group is identical, system computer at first drives little photovoltaic module to the position of sun according to the clock location that is arranged on the small Twin-shaft tracker and carries out one-time positioning, gather the electric weight numerical value of electric quantity detection apparatus, small Twin-shaft tracker control module drives little photovoltaic module and rotates in the elevation angle of a position and ° angle, azimuthal ± 5 respectively, system computer constantly gather correspondence position electric quantity detection apparatus electric weight numerical value and compare with a station acquisition electric weight numerical value, select position corresponding to maximum electric weight numerical value to adopt for the large-sized photovoltaic power generation module group as new position of sun.
Photovoltaic plant provided by the present invention sun recognition device, at first adopt the clock localization method that position of sun is carried out one-time positioning, this mode does not need hardware to drop into, only needing to write corresponding algorithm implantation computer control module according to the geographic latitude of locality can realize, for eliminating the error of calculation and system's cumulative errors of clock localization method, optimization and development as the clock localization method, the present invention directly adopts little photovoltaic module to carry out the electricity generate function test in the one-time positioning position, record its generating numerical value, then drive little photovoltaic module change in location in the certain limit of one-time positioning and obtain its generating numerical value, adopt maximum generating numerical value correspondence position to adopt for power generation module group as position of sun, also as a kind of calibration and optimization to the clock localization method, this mode result is directly accurate, because small-sized two axis tracker volumes are little, motion flexibly, so this mode hardware less investment, being easy to increases on the basis of original large-sized photovoltaic tracker and transforms, this mode is located the position that position of sun is directly chosen the electric weight maximum, the result is very reliable, need not pass through any intermediate conversion and calculating, the present invention is simple in structure, hardware drops into limited, is easy to apply in the large-sized photovoltaic power generation module group.
Description of drawings
Fig. 1 is synoptic diagram of the present invention.
Embodiment
In order to explain more fully enforcement of the present invention, embodiment of the present invention is provided, these embodiments only are to elaboration of the present invention, do not limit the scope of the invention, biaxial tracker involved among the present invention belongs to known technology at present its structure and application, Design and manufacture is all for those of ordinary skill is known in the industry, and on market, can directly buy, the localization method of position of sun is determined with two angles of elevation angle and position angle usually, synchronization, different position on earth, elevation angle is not identical with the position angle, same position, in the time of different, elevation angle also is not identical with the position angle, the elevation angle of the sun refers to that sun direct projection is to the light on ground and the angle on (water) plane, ground, namely refer to the incident direction of sunshine and the angle between the ground level, sun altitude is that the reflection earth surface obtains the weak key factor of solar energy intensively, somewhere any time sun altitude and azimuthal calculating can be finished by following process on the earth: set up geocentric coordinate system: the Z direction of principal axis is got the direction of pointing to the earth's axis arctic from the earth's core, X-axis is got the intersection direction on the equatorial plane and sun direct projection meridian plane, and Y-axis is got the direction that is positioned at 90 ° of angles, X-axis east side on the equator.Set up local coordinate: the z axle is got the direction that vertical ground points to positive zenith, the x axle get Due South to, the y axle is got the due east direction.Suppose somewhere latitude on earth be θ (north latitude θ get on the occasion of, south latitude θ gets negative value), this ground constantly time-angle of correspondence is that (φ is the difference between local longitude and the sun direct projection longitude to φ, the angle that φ per hour turns over is 15 °, the size of φ can utilize this moment and the mistiming t in the local moment at high noon to represent, formula is: φ=15 ° * t, the unit of t is hour, the morning, t got negative value, afternoon t get on the occasion of), then the transforming relationship between geocentric coordinate system and the local coordinate is:
If the point of vertical latitude of the sun on the same day is δ, the expression formula of the position vector of subsolar point in geocentric coordinate system then:
Then can obtain the expression formula of subsolar point position vector in local coordinate by the transforming relationship of two coordinate systems is:
Suppose that the elevation angle of the sun in local coordinate is H (H is the sun and horizontal angle), the position angle is P, P be the sun on the ground vertical projection point and local coordinate initial point line and local coordinate Due South between angle, this angle Due South to by east then get on the occasion of, the negative value of then getting to the west), then the point of vertical position vector of the sun can be expressed as again in local coordinate:
Two expression formulas in the local coordinate are equivalents, therefore have:
Position of sun clock localization method involved in the present invention, adopt the data based geographical physical knowledge of latitude that ground is installed to try to achieve easily the sun at a time corresponding position angle and elevation angle, can find out that from above calculating it belongs in the industry known technology, repeats no more in the present invention.
As shown in Figure 1, photovoltaic plant sun recognition device, comprise system computer 1, in system computer 1, be provided with the module that the geographic latitude employing clock location position of sun on ground is installed according to the photovoltaic generation module, be provided with the small Twin-shaft tracker 2 of system computer 1 control, be provided with azimuth sensor and elevation angle sensor on the small Twin-shaft tracker 2, little photovoltaic module 3 is arranged on the small Twin-shaft tracker 2, be provided with electric quantity detection apparatus 4 in little photovoltaic module 3 outputs, electric quantity detection apparatus 4 is connected on the system computer 1, electric weight device 4 is Computer signal input system computing machine 1 by corresponding sensor with electric energy conversion, small Twin-shaft tracker 2 control modules are set in the system computer 1, system computer 1 at first drives little photovoltaic module 3 to the position of sun according to the clock location that is arranged on the small Twin-shaft tracker 2 and carries out one-time positioning, position angle and the elevation angle position of the position of sun that namely calculates according to current time, gather the electric weight numerical value of electric quantity detection apparatus 4, small Twin-shaft tracker 2 control modules drive little photovoltaic module 3 and rotate in the elevation angle of one-time positioning position and ° angle, azimuthal ± 10 respectively, system computer 1 constantly gathers the electric quantity detection apparatus of correspondence position) electric weight numerical value and compare with a station acquisition electric weight numerical value, select position corresponding to maximum electric weight numerical value to adopt for large-sized photovoltaic power generation module group 5 as new position of sun, the used single photovoltaic module of described little photovoltaic module 3 and large-sized photovoltaic power generation module group 5 is identical, when the photovoltaic module adopts on the crystal silicon component, little photovoltaic module also adopts corresponding crystal silicon component, when the photovoltaic module adopts on the amorphous silicon module, little photovoltaic module adopts corresponding amorphous silicon module, system computer 1 at first drives little photovoltaic module 3 to the position of sun according to the clock location that is arranged on the small Twin-shaft tracker 2 and carries out one-time positioning, gather the electric weight numerical value of electric quantity detection apparatus 4, small Twin-shaft tracker 2 control modules drive little photovoltaic module 3 and rotate in the elevation angle of a position and ° angle, azimuthal ± 5 respectively, system computer 1 constantly gather correspondence position electric quantity detection apparatus 4 electric weight numerical value and compare with a station acquisition electric weight numerical value, select position corresponding to maximum electric weight numerical value to adopt for large-sized photovoltaic power generation module group 5 as new position of sun, photovoltaic module 5 is arranged on the large-sized double-shaft tracker 6, system computer 1 is according to position angle and the elevation angle of the location positioning sun of little photovoltaic module generated energy maximum, send order-driven large-sized double-shaft tracker 6 and arrive the relevant position to realize the maximization of system's generated energy, the rotation of photovoltaic module can be for discontinuous, small Twin-shaft tracker 2 can ceaselessly sought best position of sun, system computer within a certain period of time can be according to the maximum definite position of sun of generated energy, the small Twin-shaft tracker also can adopt Fixed Time Interval according to the position of sun rotation of clock location, then little photovoltaic module is mobile identification and location of realizing position of sun again, and electric quantity detection apparatus 4 of the present invention can be volometer, also can be electric energy meter, its output links by current sensor and computing system, be that numerical signal can store comparison in system computer 1 with corresponding electric energy size conversion, this application and program design belong to known technology, can after adopting the clock method to carry out one-time positioning, change first among the present invention a certain amount of position angle the more certain elevation angle of conversion seek and identify new position of sun, also can after adopting the clock method to carry out one-time positioning, seek the best position of sun of identification to position angle and elevation angle combined transformation, these application can realize in computer control module that all photovoltaic plant provided by the present invention sun recognition device at first adopts the clock localization method that position of sun is carried out one-time positioning, for eliminating the error of clock localization method, directly adopt little photovoltaic module to carry out functional test in the position location, record its generating numerical value, then drive little photovoltaic module change in location in the certain limit of one-time positioning and obtain its generating numerical value, because the small Twin-shaft tracker structure is simple, cost is low, rotates flexibly, can position position of sun very easily, adopt maximum generating numerical value correspondence position to adopt for power generation module group as position of sun, this mode result is directly accurate, the hardware less investment, and being easy to increases on the basis of original large-sized photovoltaic tracker and transforms, this mode is located the position that position of sun is directly chosen the electric weight maximum, the result is very reliable, need not pass through any intermediate conversion and calculating, and the present invention is simple in structure, hardware drops into lower, can identify accurately position of sun, improve the generating efficiency of photovoltaic generation module, reduce the photovoltaic generation application cost, avoided heavy large-sized photovoltaic tracker to rotate the defective that system effectiveness is reduced less than the optimum position, be suitable in large-sized photovoltaic power generation module group electricity generation system, applying.
After describing embodiments of the present invention in detail, the personage who is familiar with this technology can be well understood to, can carry out various variations and modification not breaking away under above-mentioned claim and the spirit, any simple modification, equivalent variations and modification that all foundations technical spirit of the present invention is done above embodiment, the scope that all belongs to technical solution of the present invention, and the present invention also is not subject to the embodiment that gives an actual example in the instructions.
Claims (3)
1. photovoltaic plant sun recognition device, comprise system computer (1), in system computer (1), be provided with the module that the geographic latitude employing clock location position of sun on ground is installed according to the photovoltaic generation module, be provided with the small Twin-shaft tracker (2) of system computer (1) control, be provided with azimuth sensor and elevation angle sensor on the small Twin-shaft tracker (2), it is characterized in that: little photovoltaic module (3) is arranged on the small Twin-shaft tracker (2), be provided with electric quantity detection apparatus (4) in little photovoltaic module (3) output, electric quantity detection apparatus (4) is connected on the system computer (1), small Twin-shaft tracker (2) control module is set in the system computer (1), system computer (1) at first drives little photovoltaic module (3) to the position of sun according to the clock location that is arranged on the small Twin-shaft tracker (2) and carries out one-time positioning, gather the electric weight numerical value of electric quantity detection apparatus (4), small Twin-shaft tracker (2) control module drives little photovoltaic module (3) and rotates in the elevation angle of one-time positioning position and ° angle, azimuthal ± 10 respectively, system computer (1) constantly gather correspondence position electric quantity detection apparatus (4) electric weight numerical value and compare with a station acquisition electric weight numerical value, select position corresponding to maximum electric weight numerical value to adopt for large-sized photovoltaic power generation module group (5) as new position of sun.
2. photovoltaic plant according to claim 1 sun recognition device is characterized in that: the used single photovoltaic module of described little photovoltaic module (3) and large-sized photovoltaic power generation module group (5) is identical.
3. photovoltaic plant according to claim 1 sun recognition device, it is characterized in that: system computer (1) at first drives little photovoltaic module (3) to the position of sun according to the clock location that is arranged on the small Twin-shaft tracker (2) and carries out one-time positioning, gather the electric weight numerical value of electric quantity detection apparatus (4), small Twin-shaft tracker (2) control module drives little photovoltaic module (3) and rotates in the elevation angle of a position and ° angle, azimuthal ± 5 respectively, system computer (1) constantly gather correspondence position electric quantity detection apparatus (4) electric weight numerical value and compare with a station acquisition electric weight numerical value, select position corresponding to maximum electric weight numerical value to adopt for large-sized photovoltaic power generation module group (5) as new position of sun.
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| CN 201210481129 CN102981513A (en) | 2012-11-23 | 2012-11-23 | Sun identification device for photovoltaic power station |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105207600A (en) * | 2013-05-23 | 2015-12-30 | 吴正明 | Photovoltaic power generation device |
| CN108646790A (en) * | 2018-05-10 | 2018-10-12 | 阜阳昂科丰光电科技有限公司 | A kind of array agriculture light complementation tracking system |
| CN111338392A (en) * | 2020-03-27 | 2020-06-26 | 天津光电通信技术有限公司 | Sun tracking method and system |
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2012
- 2012-11-23 CN CN 201210481129 patent/CN102981513A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105207600A (en) * | 2013-05-23 | 2015-12-30 | 吴正明 | Photovoltaic power generation device |
| CN108646790A (en) * | 2018-05-10 | 2018-10-12 | 阜阳昂科丰光电科技有限公司 | A kind of array agriculture light complementation tracking system |
| CN111338392A (en) * | 2020-03-27 | 2020-06-26 | 天津光电通信技术有限公司 | Sun tracking method and system |
| CN111338392B (en) * | 2020-03-27 | 2023-08-18 | 天津光电通信技术有限公司 | Sun tracking method and system |
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Application publication date: 20130320 |