CN102411376A - Photovoltaic support synchronous tracking method adopting direct current bus - Google Patents
Photovoltaic support synchronous tracking method adopting direct current bus Download PDFInfo
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- CN102411376A CN102411376A CN2011103415968A CN201110341596A CN102411376A CN 102411376 A CN102411376 A CN 102411376A CN 2011103415968 A CN2011103415968 A CN 2011103415968A CN 201110341596 A CN201110341596 A CN 201110341596A CN 102411376 A CN102411376 A CN 102411376A
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Abstract
The invention relates to a photovoltaic tracking support synchronous tracking control method which comprises the steps that: one direct current bus synchronously tracks a plurality of single-shaft tracking supports through one controller; each single-shaft tracking support is connected with the direct current bus only through two leads; each single-shaft tracking support can realize mechanical limit protection and accumulated error elimination, and an inclining angle sensor only needs to be arranged on one synchronously tracked single-shaft support as control feedback; two direct current buses synchronously track a plurality of double-shaft tracking supports through one controller; each double-shaft tracking support is only provided with four leads which are connected with the two direct current buses; each double-shaft tracking support can realize mechanical limit protection and accumulated error elimination; and the inclining angle sensor only needs to be arranged on one synchronously tracked double-shaft support as control feedback. The control method has strong project feasibility and high tracking precision, the initial price and the post maintenance fee of the tracking support are greatly reduced, and a wide development prospect is realized.
Description
Technical field
The present invention relates to a kind of photovoltaic bracket method for synchronized.
Background technology
Along with the reduction of the maturation and the cost of technology, photovoltaic generation has at home and abroad obtained using widely.Difference according to the rack form that adopts can be divided into fixed and automatic tracking type.Can be from the motion tracking support so that the generated energy of system improves 10%～50% with respect to fixed bracket, but from the cost of motion tracking support and maintenance cost also apparently higher than fixed bracket.
In order to reduce initial cost, Chinese invention patent: a kind of method for synchronized array tracking solar photovoltaic generator automatically (CN 101030741A) has proposed a kind of photovoltaic array method for synchronized based on AC bus.Its technical characterictic is: (1) adopts the AC power of same frequency to drive all synchronous micromotors that are connected the synchronous tracking support that rotating speed is identical on the AC bus simultaneously, follows the tracks of support inclination angle, two the tracking direction mechanical reduction in position angle than identical; (2) on a tracking support light sensor realization FEEDBACK CONTROL is installed therein.
The problem and shortage that this synchronous tracking and controlling method exists is following: (1) owing to only on a tracking support light sensor detection position of sun is installed therein, other support of following the tracks of synchronously fails to realize closed-loop control; And the parameter of the mechanical parameter of each support, synchronous motor and suffered wind regime difference to some extent causes support not follow the tracks of fully synchronously, and tracking error can accumulate, thereby tracking effect is reduced greatly; But should invent the problem of considering to eliminate accumulated error; And, exchange control bus owing to adopt, if will eliminate accumulated error; Need be on each support the installation site sensor; And passing the signal along to synchronous tracking control unit, this has increased support and has been connected with cable between the controller, has brought difficulty when increasing cost, for debugging, maintenance; (2) for guarantee following the tracks of the security of support operation, this method for synchronized must be installed limit sensors (generally each axially installs 2) at each support, causes damage to guarantee the support position that can not exceed the maximum; Because adopting, this patent exchanges control bus; These limit sensors must pass the signal along to synchronous tracking control unit through other cable; So that making stoppage protection and can control support, it turns back to normal operation angle scope; This has increased support and has been connected with cable between the controller, has brought difficulty when increasing cost, for debugging, maintenance; (3) this method for synchronized adopts light sensor to survey position of sun, and the tracking meeting is malfunctioning when sensor has dust to cover and be overcast and rainy.
Summary of the invention
To the problems referred to above; The purpose of this invention is to provide a kind of synchronous method of following the tracks of of photovoltaic bracket that adopts dc bus; All supports of following the tracks of are synchronously controlled by 1 controller; Only need 1 dc bus (+-two conductors) just can realize axial synchronous tracking of some tracking supports; Need not other cable and connect timing elimination and the mechanical position limitation that just can realize synchronous tracking error, and the mounted angle sensor comes the angle realization FEEDBACK CONTROL of measurement bracket to avoid the dust of light sensor to block and overcast and rainy malfunctioning problem on one of them support of following the tracks of synchronously.
For realizing above-mentioned purpose; The present invention takes following technical scheme: all supports that adopt a controller control to follow the tracks of synchronously; Each support equipped 1 (single shaft) or 2 (twin shaft) direct current generators and supporting reduction gear be for following the tracks of actuating unit, and the reduction gear ratio of same axial direct current generator parameter of each support and reduction gear is identical; Each axial direct current generator of all supports of following the tracks of synchronously is connected on 1 dc bus; Therein on 1 support the setting angle sensor as the feedback device of controller; The built-in real-time clock of controller calculates the angle that support should trace into according to astronomical formula; And the direct current generator of controlling each support according to the break-make and the polarity of angular transducer FEEDBACK CONTROL dc bus stops synchronously, forward or reverse, realizes following the tracks of synchronously.
Each support single axially be furnished with trail angle excessive with too small 2 limit switches of trail angle and 2 diodes, these 2 limit switches, 2 diodes in the direct current generator loop, only need 2 piece leads connections to the outside through certain mode series and parallel; Single axial excessive, the too small extreme position of following the tracks of synchronously of trail angle of each support is arranged to identical; When applying forward voltage at the direct current motor system two ends, this axial support anglec of rotation increases, and when the angle of support arrived extreme position greatly, the excessive limit switch of trail angle broke off, and support stops to follow the tracks of, and reaches the purpose of mechanical position limitation protection; At this moment, if when applying reverse voltage at the direct current motor system two ends, this axial support anglec of rotation reduces, and when the angle of support is little during to extreme position, the too small limit switch of trail angle breaks off, and support stops to follow the tracks of, and reaches the purpose of mechanical position limitation protection; When applying forward voltage once more, said process can repeat.
In order to eliminate accumulated error, excessive, the too small extreme position of following the tracks of synchronously of each axial trail angle of each support is arranged to identical; When every morning, support began to follow the tracks of, each of the support that controller control is all axially ran to the excessive or too small extreme position in this axial tracking angle.Through this method, each axial initial tracing positional of all supports of following the tracks of synchronously is identical, has eliminated accumulated error.
The present invention is owing to take above technical scheme, and it has the following advantages:
It is low to follow the tracks of the mounting system cost: all follow the tracks of support only 1 controller of need and 1 angular transducer synchronously (1); (2) each axial dc electric system of each support only needs 2 leads to link to each other with this axial DC control bus of controller and just can realize synchronous tracking, position limitation protection, functions such as eliminating accumulated error resets; Get in touch between each support and the controller seldom, reduced cost and debugging, maintenance difficulties.
Reliability is high: adopt limit switch to realize the mechanical position limitation protection, make the support position that can not exceed the maximum cause permanent damage.
Control accuracy is high: in every morning all supports are reset to initial tracing positional by controller, eliminated cumulative errors.
Description of drawings
Fig. 1 is direct current generator, limit switch, diode wiring diagram.
Fig. 2 is based on the uniaxiality tracking support control implementation method of dc bus.
Fig. 3 is based on the double-axis tracking support control implementation method of dc bus.
1. diode A among the figure, 2. diode B, 3. direct current generator and reducing gear, the 4. too small limit switch of trail angle contact; 5. the excessive limit switch of trail angle contact, 6. obliquity sensor, 7. D.C. contactor A, 8. D.C. contactor B; 9. direct supply, 10. real-time timepiece chip, 11. controllers, 12. single uniaxiality tracking support electrical systems; 13. dc bus one, 14. dc bus two, 15. single double-axis tracking support electrical systems, 16. one of them axial electrical system of single double-axis tracking support; 17. another axial electrical system of single double-axis tracking support, 18. D.C. contactor C, 19. D.C. contactor D.
Specific embodiments
Carry out detailed description below in conjunction with accompanying drawing and embodiment to of the present invention.
In Fig. 1, diode A (1), diode B (2), direct current generator and reducing gear (3), the too small limit switch of trail angle contact (4), the excessive limit switch of trail angle contact (5) connect into the loop by diagramatic way; When initial, the support trail angle is in the regime values scope, and this moment, trail angle too small limit switch contact (4) and the excessive limit switch of trail angle contact (5) were all closed, and when applying forward voltage, direct current generator just changes, and corresponding trail angle increases; When applying reverse voltage, the direct current generator counter-rotating, corresponding trail angle reduces; When applying forward voltage and make that trail angle surpasses excessive spacing setting of trail angle; The excessive limit switch of trail angle contact (5) is broken off; Because diode B (2) can not pass through forward current, therefore, the outage of direct current generator loop; Support stops at the excessive spacing angle position of trail angle, plays the mechanical position limitation protective effect; At this moment, if apply reverse voltage, electric current can pass through diode B (2) and the too small limit switch of trail angle contact (4) forms path, and direct current generator promotes the direction operation that support reduces toward trail angle; If apply reverse voltage always, then support stops at the too small spacing angle position of trail angle, plays the mechanical position limitation protective effect.
In the embodiment shown in Figure 2; Several uniaxiality tracking support electrical systems (12) of following the tracks of synchronously are connected in parallel on the dc bus one (13) through 2 leads; The excessive spacing position of direct current generator parameter, reducing gear reduction gear ratio, trail angle, the too small spacing position of trail angle and other mechanical property of all uniaxiality tracking supports of following the tracks of synchronously are basic identical; Mounted angle sensor (6) on uniaxiality tracking support therein; Controller (11) according to onboard clock chip (10) in real time the theory of computation follow the tracks of angle and can control and apply forward, reverse voltage on the dc bus one (13) or do not apply voltage according to the FEEDBACK CONTROL D.C. contactor A (7) of obliquity sensor (6) and disconnection, the closure (can not be closed simultaneously) of D.C. contactor B (8), thereby control linkage all uniaxiality tracking supports on dc bus are realized forward, reverse or stop tracking synchronously.It is out-of-limit that in a single day trail angle appears in any one uniaxiality tracking support of following the tracks of synchronously, then this support electric loop outage, and support stops to follow the tracks of the safety of protective cradle.Before the every day The sun came up, controller (11) is controlled all uniaxiality tracking supports and is run to the too small or excessive spacing position of trail angle, and it is identical to realize following the tracks of initial position synchronously in new one day, eliminates the accumulated error of following the tracks of synchronously the previous day; After eliminating accumulated error, the support that controller (11) control is followed the tracks of is synchronously realized one day new synchronous tracking.
In the embodiment shown in fig. 3; One of them axial electrical system (16) and another axial electrical system (17) in several double-axis tracking support electrical systems (15) of following the tracks of synchronously are connected in parallel on dc bus one (13) and the dc bus two (14) through 2 leads respectively; Each axial direct current generator parameter of all double-axis tracking supports, reducing gear reduction gear ratio, the excessive spacing position of trail angle, the too small spacing position of trail angle and other mechanical property of following the tracks of synchronously are basic identical; Mounted angle sensor (6) on double-axis tracking support therein; Controller (11) is followed the tracks of angle according to the real-time theory of computation of onboard clock chip (10) and can be controlled and apply forward, reverse voltage on the dc bus one (13) or do not apply voltage according to the FEEDBACK CONTROL D.C. contactor A (7) of obliquity sensor (6) and disconnection, the closure (can not be closed simultaneously) of D.C. contactor B (8), thus axial synchronous tracking of control linkage all double-axis tracking supports on dc bus; The disconnection of control D.C. contactor C (18) and D.C. contactor D (19), closure (can not be closed simultaneously) can be controlled and apply forward, reverse voltage on the dc bus two (14) or do not apply voltage, thus another axially synchronous tracking of control linkage all double-axis tracking supports on dc bus; Any one double-axis tracking support of following the tracks of synchronously is arbitrary, and then this support should cut off the power supply by axial electric loop axially in case trail angle to occur out-of-limit, and this support stops this axial tracking, the safety of protective cradle.Before the every day The sun came up; Controller (11) is controlled all double-axis tracking supports and is run to the spacing position of 2 axial tracking angular limits (very big or minimum); It is identical to realize following the tracks of initial position synchronously in new one day, eliminates the accumulated error of following the tracks of synchronously the previous day; After eliminating accumulated error, the support that controller (11) control is followed the tracks of is synchronously realized one day new synchronous tracking.
Claims (4)
1. synchronous tracking and controlling method of photovoltaic tracking support; Realize the synchronous tracking Control of several photovoltaic tracking supports with 1 controller; It is characterized in that: the single support of following the tracks of synchronously is basic identical in the excessive spacing position of direct current generator parameter, reducing gear reduction gear ratio, trail angle, the too small spacing position of trail angle and the mechanical property of same axial employing; A support mounted angle sensor is as feedback device therein; The single axial electric drive system of each support is connected on the dc bus; Controller is realized this axial synchronous tracking of all supports through the polarity of voltage and the break-make of control dc bus, each axially corresponding dc bus, and each dc bus is made up of 2 conductors.
2. according to the synchronous tracking and controlling method of claims 1 described a kind of photovoltaic tracking support; It is characterized in that: the single axial excessive limit switch of the trail angle contact of all supports of following the tracks of synchronously, the too small limit switch of trail angle contact are cascaded with the direct current generator three respectively with after a diode is parallelly connected again, link to each other with dc bus through 2 leads at last.
3. according to claims 1 or the synchronous tracking and controlling method of 2 described a kind of photovoltaic tracking supports; It is characterized in that: make support run to each axial extreme position by the direct current generator of controller control linkage on each axial dc bus every day; Thereby realize that the initial angle of following the tracks of is identical, eliminate the synchronous tracking error of the previous day.
4. according to claims 1 or the synchronous tracking and controlling method of 2 or 3 described a kind of photovoltaic tracking supports, it is characterized in that: each axial on all supports of synchronous tracking need 2 conductors to link to each other with this axial dc bus of controller just can realize that synchronous tracking, mechanical position limitation are protected and the accumulated error of the synchronous tracking of elimination regularly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011103415968A CN102411376B (en) | 2011-11-02 | 2011-11-02 | Photovoltaic support synchronous tracking method adopting direct current bus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103415968A CN102411376B (en) | 2011-11-02 | 2011-11-02 | Photovoltaic support synchronous tracking method adopting direct current bus |
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| CN102411376A true CN102411376A (en) | 2012-04-11 |
| CN102411376B CN102411376B (en) | 2013-11-13 |
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| CN2011103415968A Expired - Fee Related CN102411376B (en) | 2011-11-02 | 2011-11-02 | Photovoltaic support synchronous tracking method adopting direct current bus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108646792A (en) * | 2018-05-29 | 2018-10-12 | 西安理工大学 | Control device and control method of the photovoltaic generation holder group from motion tracking |
| CN113219881A (en) * | 2021-05-21 | 2021-08-06 | 浙江正泰新能源开发有限公司 | Driving device and method for photovoltaic tracking support |
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| CN101017982A (en) * | 2007-03-12 | 2007-08-15 | 刘建政 | Light voltage and wind power integrated networking device with the reactive power compensation and harmonious administration function |
| CN101030741A (en) * | 2006-02-27 | 2007-09-05 | 孙迎光 | Method for synchronized array tracking solar photovoltaic generator automatically |
| CN101345501A (en) * | 2008-09-02 | 2009-01-14 | 中国农业大学 | Photovoltaic power generation apparatus capable of automatically tracking sun direction |
| WO2009082721A1 (en) * | 2007-12-21 | 2009-07-02 | Wi-Chi, Inc. | Distributed energy conversion systems |
| CN101841160A (en) * | 2009-03-19 | 2010-09-22 | 孔小明 | Grid-connection control method for solar photovoltaic power generation |
| CN201742329U (en) * | 2010-05-07 | 2011-02-09 | 江苏东升光伏发电设备有限公司 | Linked tracking type solar battery component bracket group |
| JP2011182517A (en) * | 2010-02-26 | 2011-09-15 | Tokyo Institute Of Technology | Power converter |
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2011
- 2011-11-02 CN CN2011103415968A patent/CN102411376B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101030741A (en) * | 2006-02-27 | 2007-09-05 | 孙迎光 | Method for synchronized array tracking solar photovoltaic generator automatically |
| CN101017982A (en) * | 2007-03-12 | 2007-08-15 | 刘建政 | Light voltage and wind power integrated networking device with the reactive power compensation and harmonious administration function |
| WO2009082721A1 (en) * | 2007-12-21 | 2009-07-02 | Wi-Chi, Inc. | Distributed energy conversion systems |
| CN101345501A (en) * | 2008-09-02 | 2009-01-14 | 中国农业大学 | Photovoltaic power generation apparatus capable of automatically tracking sun direction |
| CN101841160A (en) * | 2009-03-19 | 2010-09-22 | 孔小明 | Grid-connection control method for solar photovoltaic power generation |
| JP2011182517A (en) * | 2010-02-26 | 2011-09-15 | Tokyo Institute Of Technology | Power converter |
| CN201742329U (en) * | 2010-05-07 | 2011-02-09 | 江苏东升光伏发电设备有限公司 | Linked tracking type solar battery component bracket group |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108646792A (en) * | 2018-05-29 | 2018-10-12 | 西安理工大学 | Control device and control method of the photovoltaic generation holder group from motion tracking |
| CN113219881A (en) * | 2021-05-21 | 2021-08-06 | 浙江正泰新能源开发有限公司 | Driving device and method for photovoltaic tracking support |
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| CN102411376B (en) | 2013-11-13 |
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Owner name: JIANGSU SUNEAST NEW ENERGY TECHNOLOGY CO., LTD. Free format text: FORMER NAME: JIANGSU SUNEAST PHOTOVOLTAIC POWER EQUIPMENT CO., LTD. |
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Address after: Xinghua City, Jiangsu province 225721 Taizhou City Dainan town in the industrial zone Patentee after: JIANGSU SUNEAST NEW ENERGY TECHNOLOGY CO., LTD. Address before: 225700, Tongxin Road, Dai Nan Science Park, Jiangsu, Taizhou Patentee before: Jiangsu Suneast-PV Equipment Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131113 Termination date: 20171102 |