CN1369956A - Photovoltaic electric generation system automatically tracking sun - Google Patents
Photovoltaic electric generation system automatically tracking sun Download PDFInfo
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- CN1369956A CN1369956A CN 02112553 CN02112553A CN1369956A CN 1369956 A CN1369956 A CN 1369956A CN 02112553 CN02112553 CN 02112553 CN 02112553 A CN02112553 A CN 02112553A CN 1369956 A CN1369956 A CN 1369956A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/52—PV systems with concentrators
Abstract
Photoelectric power generation system being able to follow sun autoamtically belongs to technical area of solar utilization. The system mainly composed of array of solar battery aid its mounting rack, mechanical transmission mechanism, tracking control circuit, sensor for sunlight orientation and resetting control equipment of wine proofing. The sensor for sunlight orientation includes condensing lens, sunlight signal receiver of fine and coarse adjustment. The sunlight signal receiver of fine adjustment includes light-sensitive surfaces in 4 orientations located on end face of base seat. The sunlight signal receiver of coarse adjustment includes light-sensitive surfaces in 4 orientations located on perisporium of case. The condensing lens is fixed on top end of the case.
Description
Technical field
The present invention relates to a kind of solar photovoltaic generation system, particularly a kind of photovoltaic generating system from the motion tracking sun belongs to technical field of solar utilization technique.
Background technology
Solar energy is a kind of regenerative resource of cleanliness without any pollution, and is inexhaustible.Making full use of solar energy both can alleviating energy crisis, can reduce the pollution that conventional energy resource brings again, and therefore the human biological environment of depending on for existence of protection develops the grand strategy decision-making that solar energy has become the countries in the world sustainable development.In the middle of numerous solar utilization techniques, solar photovoltaic technology has realized being electric energy with conversion of solar energy directly, be a kind of mode of utilizing of most convenient, have safe and reliable, noiseless, pollution-free, advantage such as can utilize on the spot, thereby be subjected to the attention of countries in the world.Expect the middle of this century, solar energy power generating will become one of human basic energy resource.
Existing photovoltaic generating system generally is with the solar cell fixed installation, because of can not so underuse the generating capacity of solar cell, so hold at high price, being difficult to popularize rapidly all the time over against the sun.In order to reduce the cost of photovoltaic generating system, huge fund is dropped into one after another to improve the generating capacity of solar cell in countries in the world.Method mainly is divided into two kinds: the one, and the photoelectric conversion efficiency of raising solar cell, the 2nd, make solar cell aim at the sun all the time by automatic tracking technique.These two kinds of methods all can improve the generating capacity of solar cell, but no matter how high the photoelectric conversion efficiency of solar cell self have, and by tracking means its generating capacity improved once again on former basis, thereby obtain more electric energy.Therefore the research from the photovoltaic generating system of the motion tracking sun has caused the extensive attention of countries in the world, has become one of research focus of solar utilization technique.Since the 1980s, the photovoltaic generating system of the multiple tracking sun is successively developed in countries in the world, as gear of the spring mechanism, electronic timing mechanism, computer program controlling organization and utilize simple tracking system that heated liquid expansion flow principles makes etc.Be 98244627.6 at number of patent application, name is called in the patent of " solar communications battery array automatic sunlight tracking device ", discloses a kind of method that adopts electronic timing control step motor-driven solar battery array to follow the tracks of the sun; Be 99221010.0 at number of patent application, name is called in the patent of " solar energy automatic tracking charger ", discloses a kind of electricity generation system that is made of solar panel, photosensitive circuit, tracking drive circuit, reset circuit, inverter circuit.Understand according to the applicant, though above-mentioned prior art all has certain application value, also exist following weak point: 1. tracking accuracy is low; 2. failure rate is higher; 3. wind loading rating is poor; 4. the ratio of performance to price is not high.
Summary of the invention
Primary and foremost purpose of the present invention is: overcome the main weak point that prior art exists, by using a kind of sunlight aspect sensor of forming by collector lens, fine tuning optical signal receiver, coarse adjustment optical signal receiver, a kind of tracking accuracy height, reliable and stable, the photovoltaic generating system from the motion tracking sun that the ratio of performance to price is higher are proposed.
Further aim of the present invention is to propose a kind of photovoltaic generating system from the motion tracking sun with strong wind loading rating, thereby makes this system can obtain practical popularizing.
In order to reach above-mentioned primary and foremost purpose, technical scheme of the present invention is: from the photovoltaic generating system of the motion tracking sun, mainly by solar battery array (101) and installing rack (117) thereof, drive that solar battery array is followed the tracks of the follow-up control circuit (107) of the mechanical transmission mechanism (106) of aiming at the sun, control mechanical transmission mechanism, sunlight aspect sensor (009) from signal to follow-up control circuit that transmit is formed, wherein mechanical transmission mechanism (106) is made up of azimuth driving mechanism (031) and elevation angle driving mechanism (032); It is characterized in that: described sunlight aspect sensor (009) is by collector lens (006), the fine tuning optical signal receiver, the coarse adjustment optical signal receiver, housing that is connected mutually (005) and base (008) are formed, wherein the light-receiving end face of fine tuning optical signal receiver (XOY face) is made of the photosurface (001-004) in four orientation, the light-receiving end face of coarse adjustment optical signal receiver is made of the photosurface (001 '-004 ') that is arranged in four orientation on housing (005) perisporium, collector lens (006) relative fixed is in housing (005) top, and its optical axis overlaps with the central axis (Z) of fine tuning optical signal receiver.
The present invention from the operation principle of the photovoltaic generating system of the motion tracking sun is: it is very big that the hot spot of collector lens departs from the center of fine tuning optical signal receiver in the sunlight aspect sensor, and not in the light-receiving end face of fine tuning optical signal receiver, be that solar battery array departs from over against the position of the sun when very big, the photosurface that is arranged in the coarse adjustment optical signal receiver in four orientation on the housing works, this moment, the photosurface of corresponding solar azimuth can produce corresponding signal, through follow-up control circuit relatively with signal, amplify, after the processing, the control mechanical transmission mechanism turns round to respective direction, and the hot spot of lens enters the photosurface of fine tuning optical signal receiver in the base end face in the sunlight aspect sensor.At this moment, no matter hot spot from which orientation enters, the photosurface in the corresponding orientation of fine tuning optical signal receiver all can produce different signals, after follow-up control circuit compares the fine tuning light signal, amplify, handle, the control mechanical transmission mechanism turns round to respective direction, placed in the middle until facula position, promptly sunlight transducer and solar battery array reach over against position of sun.
In order to reach further purpose, the present invention from the photovoltaic generating system of the motion tracking sun also contain when wind-force surpasses predetermined value, control by follow-up control circuit makes solar battery array get back to the windproof repositioning control device of horizontal level.In the course of work of the photovoltaic generating system of the motion tracking sun, when wind-force during less than set point, the signal of windproof repositioning control device is after follow-up control circuit is handled, and the solar battery array on the control installing rack is stably with mechanical transmission mechanism motion, from the motion tracking sun.When wind-force surpasses set point; the signal of windproof repositioning control device is sent to follow-up control circuit by cable; this control circuit driving device transmission device action; get back to the horizontal level that is subjected to the windage minimum until the solar battery array that is fixed in the above; and stop to follow the tracks of certain hour, can under the influence of wind-force, not break down with protection solar battery array and mechanical driving mechanism.
By above introduction as can be seen, the invention has the advantages that:
1. by thick, fine tuning optical signal receiver are set dexterously, realize non-blind area, detected with high accuracy to sunlight;
2. in the sunlight aspect sensor, adopt lens focus, strengthened receiving angle and intensity, improved resolution capability the sunlight orientation to sunlight;
3. adopt reliable windproof repositioning control device, given full play to the controlled function of follow-up control circuit, strengthened the wind loading rating of system, guaranteed the work safety of system;
4. owing to realized reliable high precision tracking, make solar cell aim at the sun all the time, improved the generating capacity of solar cell, therefore can improve the ratio of performance to price of photovoltaic generating system effectively.
The present invention will be further described below in conjunction with drawings and Examples.
Description of drawings
Fig. 1 is the system configuration schematic diagram of the embodiment of the invention one.
Fig. 2 is the sunlight aspect sensor structural representation of Fig. 1 embodiment one, and wherein Fig. 2 (b), Fig. 2 (c) are respectively B-B and the A-A sectional views of Fig. 2 (a).
Fig. 3 is the fine tuning optical signal sensor part-structure schematic diagram of Fig. 1 embodiment one.
Fig. 4 is the image patch position view on the optical signal receiver of sunlight aspect sensor of Fig. 1 embodiment one.
Fig. 5 is the follow-up control circuit schematic diagram of Fig. 1 embodiment one.
Fig. 6 is the partial structurtes enlarged drawing of solar battery array among Fig. 1.
Fig. 7 is the system configuration schematic diagram of the embodiment of the invention two.
Fig. 8 is the structure for amplifying schematic diagram of the windproof repositioning control device of Fig. 7 embodiment two.
Fig. 9 is the system configuration schematic diagram of the embodiment of the invention three.
Figure 10 is the sunlight aspect sensor structural representation of Fig. 9 embodiment three.
Embodiment
Embodiment one:
The system configuration of the embodiment of the invention one as shown in Figure 1 should be from the photovoltaic generating system of the motion tracking sun by condenser lens array 100, solar battery array 101 and installing rack 117 thereof, storage battery 102, charging-discharging controller 103, electrical appliance 115, support 104, inverter 105, drive solar battery array and follow the tracks of the mechanical transmission mechanism 106 of aiming at the sun, the follow-up control circuit 107 of control mechanical transmission mechanism, transmit the sunlight aspect sensor 009 of signal to follow-up control circuit, radiator 109 (referring to Fig. 6), dust cover 116 and windproof repositioning control device 110 are formed.Solar battery array 101 and condenser lens array 100 all are fixed on the installing rack 117.Mechanical transmission mechanism 106 is made up of azimuth (east-west direction) driving mechanism 031 and stack elevation angle (North and South direction) driving mechanism 032 on it, and this two driving mechanism is respectively by the motor-driven that is controlled by follow-up control circuit 107.The detailed mechanical transmission mechanism structure and the principle of follow-up control circuit be existing the description in patent 99228399 files such as " lighting equipments of automatic tracking sun " that the applicant applies for before this, do not repeat them here.
At first need to prove, sunlight aspect sensor (009) concrete structure of present embodiment as shown in Figure 2, optical signal receiver wherein is made up of coarse adjustment optical signal receiver and fine tuning optical signal receiver, arranges by four orientation at solid space.The light-receiving end face of coarse adjustment optical signal receiver is made up of photosurface 001 '-004 ', is arranged on the perisporium of housing 005; The light-receiving end face of fine tuning optical signal receiver is made up of photosurface 001-004, is distributed on the base 008 of sunlight aspect sensor.
Optical signal receiver can be made up of optical fiber (silica fiber, glass optical fiber, polymer optical fiber etc.) or light-sensitive element (photovoltaic cell, photodiode, phototriode etc.).Present embodiment selects for use optical fiber to make the sunlight aspect sensor, and an end of optical fiber is separately fixed on the photosurface 001-004,001 '-004 ', the other end respectively with follow-up control circuit in the coupling of corresponding light-sensitive element.
The concrete structure of fine tuning optical signal receiver part and action principle are made up of collector lens 006, housing 005, base 008 and position, the four directions photosurface 001-004 that is distributed in the base end face XOY face as shown in Figure 3 and Figure 4.Base 008 is connected with housing 005, and collector lens 006 relative fixed is in housing 005 top, the central axes of its optical axis Z and fine tuning optical signal receiver.Collector lens has strengthened range of receiving and intensity to sunlight to the collecting action of sunlight, has improved the resolving power to sunlight.
As shown in Figure 4, when the image patch of lens 006 is positioned at fine tuning optical signal receiver center, shown in Fig. 4 (b), show that sunlight transducer and solar battery array are over against the sun; When image patch off-center position, shown in Fig. 4 (a), Fig. 4 (c), two counterparties to photosurface will produce different signals, follow-up control circuit with signal relatively, amplify, handle after, the control mechanical transmission mechanism turns round to respective direction, and is placed in the middle until the image patch position.
The sunlight aspect sensor of above-mentioned employing optical fiber fabrication can be realized the accurate tracking sun by the mode that coarse adjustment, fine tuning optical signal receiver are combined.A kind of method is that the signal that will receive the photosurface of same direction sunlight is coupled to an output (can be coupled to an output as photosurface 001 and 001 '), become an output signal, after light-sensitive element converts the signal of telecommunication to, be sent to follow-up control circuit, the control mechanical transmission mechanism turns round to respective direction, follows the tracks of and aim at the sun.Another kind method is to handle by follow-up control circuit, when the fine tuning optical signal receiver receives light signal, the coarse adjustment optical signal receiver is inoperative, and only when the fine tuning optical signal receiver did not receive light signal, the coarse adjustment optical signal receiver just worked.As shown in Figure 5, this circuit receives change-over circuit, amplification treatment circuit, logic control circuit (LOGIC) and circuit for controlling motor by signal and forms.The photosurface 001-004 of the photosurface 001 '-004 ' of coarse adjustment optical signal receiver and fine tuning optical signal receiver is coupled to the output of a correspondence respectively, becomes digital signal S001 '-S004 ' and S001-S004 after signal receives change-over circuit, amplification treatment circuit.Wherein S001-S002 has precedence over S001 '-S002 ' in control flow, and S003-S004 has precedence over S003 '-S004 ' in control flow.For example, the photosurface 001 of fine tuning optical signal receiver and the photosurface 001 ' of coarse adjustment optical signal receiver all receive from unidirectional light signal (direction might as well be made as east), 002 and 002 ' all receive from the counterparty to light signal (counterparty to for west), when digital signal S001, the S002 of any one the photosurface correspondence in 001 and 002 are high level, the equal output low level of NOR gate IC5, S001 ' is just shielded with door IC6 like this, has only signal S001 to work; When 001,002 was low level, NOR gate IC5 exported high level, S001 ' through with door IC6 and or door IC8 after form an output signal, by circuit for controlling motor mechanical transmission mechanism is turned round to respective direction, follow the tracks of and also aim at the sun.Owing to the coarse adjustment optical signal receiver has been arranged, has therefore enlarged sunlight aspect sensor investigative range.
Secondly, wind is one of the influencing factor that must consider of any solar photovoltaic generation system, does not have that draught exclusion device or windproof mechanism design are unreasonable all might to influence tracking accuracy, even might destroy mechanical transmission mechanism or solar battery array.In fact, the photovoltaic generating system of many tracking sun is difficult to reach practicability because of the wind loading rating difference exactly.Present embodiment adopts the windproof repositioning control device of being made up of wind sensor 111 110 to solve this problem.Wind sensor 111 is installed on the base, and its signal output part connects the signal input part of follow-up control circuit 107.When wind-force reaches certain speed (as strong gale), wind sensor 111 is sent signal to follow-up control circuit 107, system stops to follow the tracks of, and mechanical driving mechanism 106 drive installation framves 117 forward horizontal level to, and this moment, condenser lens array and solar battery array were subjected to the windage minimum.When wind-force is reduced to a certain degree (as below 8 grades the time), system restoration is normally followed the tracks of.
What be worth mentioning at last is, condenser lens array 100 is fixedly mounted on the top of solar battery array 101, radiation intensity can be improved like this, more electric energy (this scheme also can directly replace with the concentrating solar battery module) can be produced solar cell.The heat that produces after the sunlight can reduce photoelectric conversion efficiency but then, even damages solar cell, therefore must take suitable cooling measure.As shown in Figure 6, present embodiment is fixed on solar cell 101 on the splendid radiator of heat dispersion 109.In order further to reduce the temperature of solar cell, also infrared antisolar glass 112 or anti-hot glass 113 can be installed above solar cell 101.The effect of dust cover 116 is foreign material such as blocks dust, in order to avoid influence the generating capacity of solar cell.
Embodiment two:
The basic structure of present embodiment and operation principle and embodiment one are identical, and its main distinction is elevation angle driving mechanism and windproof repositioning control device.
As shown in Figure 7, installing rack 117 links to each other with elevation angle driving mechanism 032 by bearing 035, and bearing 035 is divided into area and two parts 118 that vary in weight and 119 with installing rack 117, and wherein 118 area and weight are all greater than 119 area and weight.Comprise shaft 036, rolling wheel 037, wirerope 038 and fixed pulley 039 in the elevation angle driving mechanism 032, described rolling wheel 037 is connected with shaft 036,039 on fixed pulley drives 032 with elevation angle and is connected, wirerope 038 is wound on the rolling wheel 037, and links to each other with installing rack 117 with fixed pulley 039 by windproof repositioning control device 110.
The concrete structure of windproof repositioning control device 110 is made up of framework 020, spring 021, sensitive switch 023 and 025, plectrum 024 and 028, slide bar 026, baffle plate 027 as shown in Figure 8.Described framework 020 links to each other with rolling wheel 036 by wirerope 038; One end of spring 021 is fixed on the framework 020, and the other end links to each other with the wirerope 038 of walking around fixed pulley 039 by slide bar 026; Plectrum 024 and 028 and spring be connected.When wind-force during less than 8 grades, the telescopic spring deformation range in the windproof repositioning control device is little, only plays transferring power, is about to transmission of power on the rolling wheel to installing rack, drives solar battery array at the elevation angle direction tracking sun.Because the center of gravity of installing rack does not overlap with the center of bearing 035, so just makes installing rack that the trend of a deflection is arranged all the time, and produces certain pulling force by wirerope to spring, this moment, two sensitive switches were in normally open.When wind-force during greater than 8 grades, if wind-force is rotated counterclockwise to blowing installing rack by A, the suffered pulling force of spring becomes big, produce and stretch, drive plectrum 024 and push down sensitive switch 023, sensitive switch 023 passes the signal to follow-up control circuit by cable, is forwarded framework 117 to horizontal level and is stopped to follow the tracks of 10 minutes by mechanical transmission mechanism, can not break down under the influence of wind-force with protection solar battery array and mechanical driving mechanism; In like manner; if wind-force is turned clockwise to blowing installing rack by B; then the suffered pulling force of spring diminishes; produce and shrink; plectrum 028 is pushed down sensitive switch 025; after follow-up control circuit received the signal that sensitive switch 025 sends here, the control mechanical transmission mechanism forwarded framework 117 to horizontal level and stopped to follow the tracks of 10 minutes, can not break down under the influence of wind-force to protect relevant parts.Whether detect wind-force after spending 10 minutes more less than 8 grades,, otherwise still remain on horizontal level if then return to normal tracking mode less than 8 grades.Respectively there is a slice baffle plate 027 at two ends at slide bar 026, and spring can only be moved in the stroke range that two baffle plates limit, and to prevent the resilience force that the spring sudden contraction produces or excessively to stretch limit switch 023,025 are caused damage.
Embodiment three:
Present embodiment is as shown in Figure 9, and is also basic identical with the structure of embodiment one, and its difference has 2 points:
The one, adopt common solar module, rather than adopt collector lens and concentrating solar battery, as shown in Figure 9.In addition also in the surface coverage of solar battery array one deck tempering protective glass 114.
The 2nd, the optical signal receiver of sunlight aspect sensor adopts light-sensitive element, rather than optical fiber.As shown in figure 10, the equal selected parameter of fine tuning optical signal receiver and coarse adjustment optical signal detector symmetry performance preferably photovoltaic cell form.
Except that above embodiment; the technical scheme that produces after the technical characterictic permutation and combination that the described sunlight aspect sensor of above-mentioned several embodiment, windproof repositioning control device, mechanical transmission mechanism, solar battery array etc. are different still belongs to the protection range that present patent application requires.
Claims (8)
1. photovoltaic generating system from the motion tracking sun, mainly by solar battery array (101) and installing rack (117) thereof, drive that solar battery array is followed the tracks of the follow-up control circuit (107) of the mechanical transmission mechanism (106) of aiming at the sun, control mechanical transmission mechanism, sunlight aspect sensor (009) from signal to follow-up control circuit that transmit is formed, wherein mechanical transmission mechanism (106) is made up of azimuth driving mechanism (031) and elevation angle driving mechanism (032); It is characterized in that: described sunlight aspect sensor (009) is by collector lens (006), the fine tuning optical signal receiver, the coarse adjustment optical signal receiver, housing that is connected mutually (005) and base (008) are formed, wherein the light-receiving end face of fine tuning optical signal receiver (XOY face) is made of the photosurface (001-004) that is distributed in four orientation in the base end face, the light-receiving end face of coarse adjustment optical signal receiver is made of the photosurface (001 '-004 ') that is arranged in four orientation on housing (005) perisporium, collector lens (006) relative fixed is in housing (005) top, and its optical axis overlaps with the central axis (Z) of fine tuning optical signal receiver.
2. according to the photovoltaic generating system from the motion tracking sun of claim 1, it is characterized in that: also contain when wind-force surpasses predetermined value, the control by follow-up control circuit (107) makes solar battery array (101) get back to the windproof repositioning control device (110) of horizontal level.
3. the photovoltaic generating system from the motion tracking sun according to claim 2, it is characterized in that: described windproof repositioning control device (110) is made up of wind sensor (111), and the signal output part of described wind sensor (111) connects the signal input part of follow-up control circuit (107).
4, photovoltaic generating system from the motion tracking sun according to claim 2, it is characterized in that: installing rack (117) links to each other with elevation angle driving mechanism (032) by bearing (035), two parts that described bearing (035) is divided into installing rack (117) area and varies in weight, described elevation angle driving mechanism (032) also comprises shaft (036), rolling wheel (037), wirerope (038) and fixed pulley (039), described rolling wheel (037) is connected with shaft (036), fixed pulley (039) axle is connected with elevation angle driving mechanism (032), wirerope (038) is wound on the rolling wheel (037), and link to each other with installing rack (117) with fixed pulley (039) by windproof repositioning control device (110), described windproof repositioning control device (110) is by framework (020), spring (021), sensitive switch (023,025), plectrum (024,028), slide bar (026), baffle plate (027) is formed, and described framework (020) links to each other with rolling wheel (037) by wirerope (038); One end of described spring (021) is fixed on the framework (020), and the other end links to each other with the wirerope of walking around fixed pulley (039) (038) by slide bar (026); Plectrum (024,028) is connected with spring (021).
5. the photovoltaic generating system from the motion tracking sun according to claim 1 and 2 is characterized in that: also contain condenser lens array (100), described condenser lens array (100) is fixedly mounted on the top of solar battery array (101).
6. the photovoltaic generating system from the motion tracking sun according to claim 5 is characterized in that: described solar battery array (101) is fixed on the radiator (109).
7. the photovoltaic generating system from the motion tracking sun according to claim 6 is characterized in that: infrared antisolar glass (112) or anti-hot glass (113) are equipped with in the top of described solar battery array (101).
8. according to the photovoltaic generating system from the motion tracking sun of claim 1 or 2, it is characterized in that: the optical signal receiver in the described sunlight aspect sensor (009) is made up of optical fiber or light-sensitive element.
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| CNB021125538A CN1148867C (en) | 2002-01-17 | 2002-01-17 | Photovoltaic electric generation system automatically tracking sun |
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| CNB021125538A CN1148867C (en) | 2002-01-17 | 2002-01-17 | Photovoltaic electric generation system automatically tracking sun |
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| CN1148867C CN1148867C (en) | 2004-05-05 |
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