CN101576751B - High-precision automatic tracking control device for solar double shafts - Google Patents
High-precision automatic tracking control device for solar double shafts Download PDFInfo
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- CN101576751B CN101576751B CN2009100277691A CN200910027769A CN101576751B CN 101576751 B CN101576751 B CN 101576751B CN 2009100277691 A CN2009100277691 A CN 2009100277691A CN 200910027769 A CN200910027769 A CN 200910027769A CN 101576751 B CN101576751 B CN 101576751B
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- phase inverter
- position sensor
- rotating speed
- comparer
- comparator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S50/00—Arrangements for controlling solar heat collectors
- F24S50/20—Arrangements for controlling solar heat collectors for tracking
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/47—Mountings or tracking
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention relates to a high-precision automatic tracking control device for solar double shafts. A direct-current power supply is connected with a three-phase inverter which is connected to a permanent-magnetic direct current servo motor, and a rotating shaft of the permanent-magnetic direct current servo motor is assembled with a rotor position sensor; a signal output end of the rotor position sensor is connected with a logical switch and a rotating speed feedback device respectively, an output end of the rotating speed feedback device is connected to a first comparator which is connectedwith an input end of a rotating speed controller, an output end of the rotating speed controller is connected with a second comparator, the second comparator is connected to a current controller, the current controller is connected with the logical switch, and the logical switch is connected to the three-phase inverter; and a rotating speed command signal is input from the first comparator, and a current feedback signal is input from the second comparator. The proposal carries out closed-loop control for the rotating speed, torque and position of the motor, the position sensor greatly improve s the position precision by adopting the frequency doubling technology, the automatic precision tracking of sunlight is also realized, and the utilization rate of solar energy utilized by solar energyequipment is improved.
Description
Technical field
The present invention relates to a kind of high-precision automatic tracking control device for solar double shafts.
Background technology
Photovoltaic generation can provide sustainable energy for the mankind, and protects the environment of depending on for existence; But its generating efficiency is low, cost of electricity-generating is higher relatively, still restricts its large-scale application.Solar tracking system is need carry out real-time follow-up to the sun to solar energy power generating, and photovoltaic array is rotated along with the sun, realizes high-precision solar tracking.The stability of automatic sun tracker and reliability be always its not by the subject matter of large-scale application, the solar energy tracking control system is one of crucial.Owing to the instability of sun power with change in time and move, therefore adopt general method, accomplish very difficulty of accurate tracking.The generated energy of solar cell array is relevant with angle of incidence of sunlight, and generated energy is maximum when sunray is vertical with the solar cell array plane.
The fixedly poor efficiency generation mode of square formation is generally adopted in solar energy power generating at present, exists problems such as tracker accuracy is low, bad adaptability.
Summary of the invention
The objective of the invention is to overcome the deficiency that prior art exists, a kind of high-precision automatic tracking control device for solar double shafts is provided, be intended to control the solar energy photovoltaic array and can accurately navigate to appointed positions, improve positional precision.
The object of the invention is realized through following technical scheme:
High-precision automatic tracking control device for solar double shafts; Comprise direct supply, three-phase inverter and rotor-position sensor; Characteristics are: said direct supply connects three-phase inverter; Three-phase inverter inserts the DC servomotor, is fitted with rotor-position sensor in the rotating shaft of said DC servomotor; The signal output part of said rotor-position sensor connects logic switch and speed feedback device respectively; The output terminal of said speed feedback device inserts first comparer; First comparer is connected with the input end of rotational speed governor, and the output terminal of said rotational speed governor connects second comparer, and said second comparer inserts current controller; Said current controller is connected with logic switch, and said logic switch inserts three-phase inverter; In addition, the rotary speed instruction signal is imported from first comparer, and current feedback signal is imported from second comparer.
Further, above-mentioned high-precision automatic tracking control device for solar double shafts, wherein, said rotor-position sensor is a scrambler.
Further, above-mentioned high-precision automatic tracking control device for solar double shafts, wherein, said three-phase inverter adopts power switch circuit.
Substantive distinguishing features and obvious improvement that technical scheme of the present invention is outstanding are mainly reflected in:
The present invention is novel in design; Closed-loop control is carried out in motor speed, torque, position, and self-regulation motor was in fast state when rotational angle was big, when fast position near the location, slowed down automatically; Make solar energy photovoltaic panel accurately navigate to appointed positions, reach high-precision position control.Realization is rotated from motion tracking sun altitude and position angle; Move according to solar motion track mode; Follow the tracks of the sun from east to west and declination angle, guarantee to obtain the maximum solar energy, make any by day moment of solar cell array all be right against the sun; Thereby can improve the about 35-40% of generated energy, reduce cost of investment about 20%.Be rated as have novelty, the good technology of creativeness, practicality, economic benefit and social effect are remarkable, market application foreground is wide.
Description of drawings
Below in conjunction with accompanying drawing technical scheme of the present invention is described further:
Fig. 1: control block scheme of the present invention.
The implication of each Reference numeral sees the following form among the figure:
| Reference numeral | Implication | Reference numeral | Implication | | Implication | |
| 1 | The |
2 | Three- |
3 | |
|
| 4 | Rotor- |
5 | |
6 | |
|
| 7 | Rotational speed governor | 8 | The |
9 | First comparer | |
| 10 | Second comparer | A | The rotary speed instruction signal | B | Current feedback signal |
Embodiment
There are defectives such as precision is low, power consumption is big, efficient is low, bad adaptability to present solar tracking system; The present invention designs a kind of high-precision sun double-shaft auto-tracking control system; Orientation according to the sun; Make solar energy photovoltaic panel keep vertical constantly, make photovoltaic efficiency reach maximization with sunray.
High-precision sun double-shaft auto-tracking control system; As shown in Figure 1; Mainly comprise direct supply 3, three-phase inverter 2, DC servomotor 1, rotor-position sensor 4, rotational speed governor 7, current controller 6 and logic switch 5; Direct supply 3 connects three-phase inverter 2, and three-phase inverter 2 inserts DC servomotor 1, is fitted with rotor-position sensor 4 in the rotating shaft of said DC servomotor 1; The signal output part of rotor-position sensor 4 connects logic switch 5 and speed feedback device 8 respectively; The output terminal of speed feedback device 8 inserts first comparer 9; First comparer 9 is connected with the input end of rotational speed governor 7, and the output terminal of rotational speed governor 7 connects second comparer 10, and said second comparer 10 inserts current controller 6; Current controller 6 is connected with logic switch 5, and said logic switch 5 inserts three-phase inverter 2; In addition, rotary speed instruction signal A is from 9 inputs of first comparer, and current feedback signal B is from 10 inputs of second comparer.Wherein, rotor-position sensor 4 is a scrambler, and three-phase inverter 2 adopts power switch circuit.
During concrete the application; Direct supply 3 is controlled through 2 pairs of DC servomotors 1 of three-phase inverter; DC servomotor 1 coaxial equipped rotor-position sensor 4 (scrambler); Its feedback signal is divided two-way: lead up to logic switch 5 to three-phase inverter 2 (power switch circuit); Power (control signal) is distributed to each phase winding (coil) on the motor stator with certain logical relation, make motor produce continuous torque, the signal of 5 pairs of rotor-position sensors of logic switch, 4 outputs, rotating signal etc. carry out logic synthesis; And another road relatively gets into rotational speed governor 7 in the back through speed feedback device 8 with rotary speed instruction signal A, then with current feedback signal B relatively the back to current controller 6, thereby closed-loop control is carried out in motor speed, torque, position.This servo electrical machinery system can self-regulation motor when rotational angle is big be in fast state, when fast position near the location, can slow down automatically.Position transducer 4 (scrambler) adopts frequency doubling technology, significantly improves positional precision, makes solar energy photovoltaic panel accurately navigate to appointed positions, reaches high-precision position control.Realization is rotated from motion tracking sun altitude and position angle, moves according to solar motion track mode, follows the tracks of the sun from east to west and declination angle; Solve sunshine all the time vertical irradiation to body surface; Guarantee to obtain the maximum solar energy, guarantee any by day moment of solar cell array, can realize 8 hours automatic real-time tracings of whole day the sun all over against the sun; Thereby can improve the about 35-40% of generated energy, reduce cost of investment about 20%.
In addition; Technical scheme of the present invention is also according to the longitude and latitude of different location; According to the Changing Pattern of earth rotation and revolution, utilize the astronomical algorithm of high precision calculate automatically local too can the position angle and the angle of pitch, result of calculation averages atmospheric refraction and handles; Make tracking accuracy reach 0.1 degree, far above common 0.2-0.35 degree.Various controlled variable can be provided with flexibly, can be provided with easily with requirements of one's work according to different places; Adopt up-to-date memory technology, data are set under the situation of power down still can preserve 10 years, exempt the worry that battery failure causes loss of data, machinery requirement to be proofreaied and correct again.Various controlled variable can be provided with according to different regions and requirements of one's work flexibly, and can be according to the actual sun set/raise time automatic on-off of locality.Supporting software cooperates with GPS, can accurately read parameters such as local time, longitude, latitude, and in controller, preserves the parameter synchronization that gets access to, the high precision clock chip, and error was less than 4 minutes in 1 year, and full-automatic photovoltaic is proofreaied and correct.The standard type adopts 485 communication modes, and communication distance can reach 500 meters under the situation that does not connect repeater; On the standard type, install one 485 commentaries on classics ethernet module again additional and can realize the most general ICP/IP protocol standard, can realize long-range network service.Controller panel is designed with four LED (Light-Emitting Diode) display screen, is not having also to use the setting of parameter and the operational factor of read machine under the situation of computer always; LED display had no action promptly to close automatically in 10 minutes; More intuitive software operation interface, the rotation situation of 3D real time modelling photovoltaic panel, current of electric, the dynamic demonstration of photovoltaic panel real-time current etc.; Have various protection mechanisms, block protection etc. like strong wind protection, motor overload protection, motor.
In sum, high-precision sun double-shaft auto-tracking control system of the present invention realizes the automatic accurate tracking of sunshine, improves solar facilities greatly to solar energy utilization rate.Being easy to industrialization production, having broken the situation that restriction sun power utilizes, is the new design of a practicality, and application prospect is very good.
What need understand is: above-mentioned explanation is not to be limitation of the present invention, and in concept of the present invention, the interpolation of being carried out, conversion, replacement etc. also should belong to protection scope of the present invention.
Claims (3)
1. high-precision automatic tracking control device for solar double shafts; Comprise direct supply (3), three-phase inverter (2) and rotor-position sensor (4); It is characterized in that: said direct supply (3) connects three-phase inverter (2); Three-phase inverter (2) inserts DC servomotor (1), is fitted with rotor-position sensor (4) in the rotating shaft of said DC servomotor (1); The signal output part of said rotor-position sensor (4) connects logic switch (5) and speed feedback device (8) respectively; The output terminal of said speed feedback device (8) inserts first comparer (9); First comparer (9) is connected with the input end of rotational speed governor (7); The output terminal of said rotational speed governor (7) connects second comparer (10); Said second comparer (10) inserts current controller (6), and said current controller (6) is connected with logic switch (5), and said logic switch (5) inserts three-phase inverter (2); In addition, rotary speed instruction signal (A) is from first comparer (9) input, and current feedback signal (B) is imported from second comparer (10).
2. high-precision automatic tracking control device for solar double shafts according to claim 1 is characterized in that: said rotor-position sensor (4) is a scrambler.
3. high-precision automatic tracking control device for solar double shafts according to claim 1 is characterized in that: said three-phase inverter (2) adopts power switch circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100277691A CN101576751B (en) | 2009-05-21 | 2009-05-21 | High-precision automatic tracking control device for solar double shafts |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100277691A CN101576751B (en) | 2009-05-21 | 2009-05-21 | High-precision automatic tracking control device for solar double shafts |
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| CN101576751A CN101576751A (en) | 2009-11-11 |
| CN101576751B true CN101576751B (en) | 2012-05-23 |
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| CN2009100277691A Active CN101576751B (en) | 2009-05-21 | 2009-05-21 | High-precision automatic tracking control device for solar double shafts |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013177962A1 (en) * | 2012-05-29 | 2013-12-05 | 上阳能源科技有限公司 | Automatic solar tracking adjustment and control device for solar power generation unit |
| CN108260899A (en) * | 2018-03-27 | 2018-07-10 | 京东方科技集团股份有限公司 | Outdoor sun shade and application method |
| CN114229041A (en) * | 2022-01-14 | 2022-03-25 | 中国科学院沈阳自动化研究所 | Double-freedom-degree solar cell array driving mechanism |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1838014A (en) * | 2006-04-05 | 2006-09-27 | 陈应天 | Method for improving drive precision and reliability of common DC motor by simple encoder |
| CN1978893A (en) * | 2005-12-01 | 2007-06-13 | 王家忠 | Solar generating apparatus |
| CN201438680U (en) * | 2009-05-21 | 2010-04-14 | 苏州工业园区美能新能源有限公司 | Novel high-precision dual-shaft automatic sun-tracking control device |
-
2009
- 2009-05-21 CN CN2009100277691A patent/CN101576751B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1978893A (en) * | 2005-12-01 | 2007-06-13 | 王家忠 | Solar generating apparatus |
| CN1838014A (en) * | 2006-04-05 | 2006-09-27 | 陈应天 | Method for improving drive precision and reliability of common DC motor by simple encoder |
| CN201438680U (en) * | 2009-05-21 | 2010-04-14 | 苏州工业园区美能新能源有限公司 | Novel high-precision dual-shaft automatic sun-tracking control device |
Non-Patent Citations (1)
| Title |
|---|
| JP昭59-36818A 1984.02.29 |
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| CN101576751A (en) | 2009-11-11 |
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Address after: 215122 No. 239, cross spring road, Suzhou Industrial Park, Jiangsu Patentee after: Suzhou Industrial Park Meineng New Energy Co., Ltd. Patentee after: Suzhou Hexin Electric Co., Ltd. Address before: 215122 No. 239, cross spring road, Suzhou Industrial Park, Jiangsu Patentee before: Suzhou Industrial Park Meineng New Energy Co., Ltd. Patentee before: Hexin Electric Appliance Co., Ltd., Suzhou Industry Region |