CN101399451B - Energy cut protection device for solar automatically tracking system - Google Patents
Energy cut protection device for solar automatically tracking system Download PDFInfo
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- CN101399451B CN101399451B CN2007101768757A CN200710176875A CN101399451B CN 101399451 B CN101399451 B CN 101399451B CN 2007101768757 A CN2007101768757 A CN 2007101768757A CN 200710176875 A CN200710176875 A CN 200710176875A CN 101399451 B CN101399451 B CN 101399451B
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
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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
Abstract
The invention relates to a power cut protection device of a solar automatic tracing system, comprising electrical source (1), an electricity grid testing circuit (2), standby electrical source (3), a relay (4), an automatic tracing controller (5) and an electrical motor execution system (6). The input terminal of the electricity grid testing circuit (2) is connected with the electrical grid, the output terminal is connected with the I/O port of the automatic tracing controller (5); the input port of the standby electrical source (3) is connected with the electrical grid, the output terminal is connected with the relay (4), the relay (4) is connected with the power supply terminal of the automatic tracing controller (5), and the automatic tracing controller (5) is connected with the electrical motor execution system (6). The invention can detect the electrical source of the tracing system in real time and transfer the state of the electrical source to the automatic tracing controller (5). When the tracing system works normally, power is directly supplied to a gearing of the tracing system by the electrical source; when power cut happens to the electrical source, the standby electrical power supplies power to the gearing of the tracing system and executes the reset program of the tracing system, thus facilitating the solar tracing system to be in safe pose.
Description
Technical field
The present invention relates to solar automatic tracking system, particularly energy cut protection device for solar automatically tracking system.
Background technology
Along with becoming increasingly conspicuous of the energy and environmental problem, the development and utilization of regenerative resource has caused common people's attention gradually.Solar energy with its cleaning, have a very wide distribution, utilize characteristics such as convenient to become to develop regenerative resource faster.Solar energy power generating is one of principal mode of solar energy utilization, but because costing an arm and a leg of present solar panel causes the cost of photovoltaic generation high, so restricted the development of solar energy power generating industry.Therefore how to improve the utilization ratio of solar energy, reduce solar energy and utilize cost to become the focus of present people's research.The sun being followed the tracks of, guaranteed solar incident ray vertical incidence all the time, improve the solar irradiation amount of radiation, is to improve simple and one of the effective measures of sun utilance.
Solar automatic tracking system; especially big capacity or unattended solar automatic tracking system; can have the full-order system defencive function and be it reliably working and the prerequisite of the practicability of marching toward; solar automatic tracking system is in the past only paid attention to the realization from the main functionality of motion tracking mostly, has ignored the design of solar automatic tracking system emergency set in emergency circumstances.Chinese patent 200520071297.7 " based on the sun tracker of following the tracks of the attitude feedback ", 200620085049.2 " automatic tractor of photovoltaic timing solar collector " all are under the normal condition automatic sun tracking device being designed; and for after the power failure suddenly of solar automatic tracking system power supply, how tracking system moves does not but relate to autoprotection.Though the probability of strong wind or mechanical resonance appears in sun automatic system after power supply has a power failure suddenly very little, this kind situation is in case occur, and will be expendable to the damage of solar automatic tracking system.
Summary of the invention
Technical problem to be solved by this invention provides a kind of automatic sun tracking cut protection device, makes solar automatic tracking system when accidental power failure, still can tackle situations such as strong wind, system resonance, to such an extent as to system itself is not damaged.
The technical scheme that technical solution problem of the present invention is adopted is as follows:
Automatic sun tracking cut protection device of the present invention mainly comprises power supply, power state detection circuit, relay, with automatic tracking controller and the motor executive system of single-chip microcomputer PIC16F877 as microcontroller.
Said power state detection circuit is a halfwave rectifier type sample circuit, the line voltage sampled signal is converted to digital signal through light-coupled isolation, and this digital signal directly links to each other with micro controller I/O mouth, whether the result of microcontroller by this I/O mouth state is judged discerns power supply and has a power failure.
Said power supply is meant the power supply and the stand-by power supply of solar automatic tracking system transmission device, here the power supply that claims autotracker is a main power source, main power source is an electrical network, and what stand-by power supply adopted is the off-line UPS uninterrupted power supply, and the UPS uninterrupted power supply has the power supply management function.At electrical network just often, electrical network directly is the power supply of automatic sun tracking control system, and UPS is in holding state; Behind grid power blackout, the power supply of automatic sun tracking control system automatically switches on the UPS, and power until finishing the task that the solar tracking system attitude is adjusted by it always, send the attitude adjustment by microcontroller then and finish instruction, and the control time-delay relay disconnects the automatic sun tracking control system from UPS, prevents that the UPS output from trickle occurring and causing the UPS damage.
Said microcontroller can be single-chip microcomputer, digital signal processor DSP, or programmable logic controller (PLC) PLC.
Said motor executive system, can be stepping motor system, AC servo motor system or direct current machine, actuating motor links to each other with worm and gear or electric pushrod through decelerator or gear graduation, and finally rotates photovoltaic array and make its arrival assigned address.
Automatic sun tracking cut protection device of the present invention detects the power supply of tracking system in real time by the power state detection circuit, and detected power supply status is passed to microcontroller.During the tracking system operate as normal, the tracking system transmission device is directly powered by power supply; When power supply had a power failure, microcontroller received the power supply power cut signal, and the tracking system transmission device changes by the stand-by power supply power supply, and carried out the reset routine of tracking system simultaneously, made solar tracking system be in safe attitude.
The invention has the beneficial effects as follows:
Power state detection circuit among the present invention, simplicity of design, with low cost, reliable operation, isolation design with forceful electric power and light current, weak electricity system such as microcontroller and extraneous strong power system electrical network have been carried out effective electrical isolation, and this electrical isolation measure simultaneously can prevent that also other circuit that is struck by lightning to control system from causing damage.In addition, the present invention has selected off-line UPS as standby power system, and by microcontroller it is managed, and traditional standby power supply UPS combines with microcontroller, makes the formation of standby power system simple and reliable.The present invention has improved the solar automatic tracking system reliability of operation effectively, makes it to realizing that truly unattended operation work system is near a step.
Description of drawings
Fig. 1 apparatus of the present invention block diagram of system, among the figure: 1 is electrical network, 2 is the electric network state testing circuit, 3 is UPS, 4 is relay, 5 is single-chip microcomputer PIC16F877, and 6 is the drive system of being made up of Signal Spacing amplifying circuit, stepping motor, driver, decelerator and rotating mechanism, and 7 is the controlling object solar cell photovoltaic array of automatic tracking system;
Fig. 2 is an electric network state testing circuit of the present invention;
Fig. 3 is an electric network state testing circuit of the present invention;
Fig. 4 is a motor executive system composition frame chart of the present invention, among the figure: 8 motor control signals that send for single-chip microcomputer, 9 is the isolating amplifier circuit of motor control signal, 10 is stepper motor driver, 11 is stepping motor, and 12 is decelerator, and 13 is rotating mechanisms such as worm and gear, electric pushrod;
Fig. 5 is the isolating amplifier circuit of motor control signal.
Embodiment
Further describe the present invention below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, the present invention mainly comprise power supply 1 (specifically referring to electrical network here), electric network state testing circuit 2, stand-by power supply UPS uninterrupted power supply 3, relay 4, with single-chip microcomputer PIC16F877 as the automatic tracking controller 5 of microcontroller, motor executive system 6 etc.The each several part connected mode is as follows: the input of electric network state testing circuit 2 directly links to each other with electrical network, output links to each other with the I/O mouth of automatic tracking controller 5, stand-by power supply 3 input ports link to each other with electrical network, output links to each other with relay 4, relay 4 links to each other with the feeder ear of automatic tracking controller 5, and automatic tracking controller 5 links to each other with motor executive system 6.
Electric network state testing circuit 2 of the present invention as shown in Figures 2 and 3, AUL2, AUN2 are direct-flow input end, are connected in parallel on the storage capacitor, are the control coil power supply of relay 4.ACL, ACN are AC input terminal, link to each other with the 230V utility grid, also are connected in parallel on the common of relay 4 simultaneously, and piezo-resistance R1 is connected in parallel between AC input terminal ACN and the earth, and piezo-resistance R2 is connected in parallel between AC input terminal ACL and the earth.Resistance R 3 and resistance R 4 series connection constitute bleeder circuit, and its common point links to each other with the anode of diode D10, and fuse F1 is connected between relay contact and the terminal AN, and diode D10, electrochemical capacitor EC1 and current-limiting resistance R5 form half-wave rectifying circuit jointly.Diode D10 is connected between resistance R 3 and the R5, and electrochemical capacitor EC1 links to each other with the negative electrode of D10 and the 2 pin DW-of optical coupler G1 respectively, and resistance R 5 is connected between the 1 pin DW+ of the negative electrode of D10 and optical coupler G1.
As shown in Figure 3,3 pin of optical coupler TLP521 and 4 pin are the output of optical coupler, 3 pin link to each other with ground, 4 pin link to each other with+5V power supply through resistance R 6, the base stage of triode N1 links to each other with 4 pin of optical coupler by resistance R 8, the current collection of triode N1 is the lead-out terminal of electric network state testing circuit very, is labeled as DDS, and it links to each other with+5V power supply by resistance R 7.
Motor executive system 6 of the present invention as shown in Figure 4, motor control signal 8 is sent by the automatic sun tracking controller, pass to motor control signal isolating amplifier circuit 9, the input side joint automatic sun tracking controller of motor control signal isolating amplifier circuit 9, outlet side links to each other with motor driver 10, motor driver 10 direct drive stepping motor 11, and stepping motor 11 links to each other with gear in the reducing gear 12, after deceleration and moment amplification, driving machinery rotating mechanism 13 rotates.
Figure 5 shows that motor control signal isolating amplifier circuit 9, motor control signal BJDJ links to each other with the base stage of triode N11 through resistance R 9, resistance R 10 is connected in parallel between the base stage and ground GND of triode N11, the emitter of triode N11 links to each other with ground GND, collector electrode links to each other with 2 pin of optical coupler TLP521,1 pin of optical coupler TLP521 links to each other with+5V power supply through pull-up resistor R6, the 3 pin ground connection DGND of optical coupler TLP521,4 pin of optical coupler TLP521 link to each other with the DS+5V power supply through resistance R 6.
The course of work of the present invention is as follows:
Electrical network at first links to each other with stand-by power supply UPS3, and the UPS output links to each other with the solar automatic tracking system feeder ear, and electrical network also directly links to each other with the arrival end of electric network state testing circuit simultaneously.Electrical network just often, UPS discerns the state of electrical network automatically, UPS carries out self-charging to the storage battery that carries, after charging was finished, line voltage directly picked out from the UPS output without any processing, was the solar automatic tracking system power supply.The sub-AUL2 of direct-flow input end links to each other with the input of relay 4 control coils with AUN2, is powered by storage capacitor.Electrical network just often; the storage capacitor charging; storage capacitor is the relay control coil power supply; make relay 4 be in normally off, AC input terminal AUL links to each other with electrical network with AUN, after relay 4 closures; AC network links to each other with fuse F1 with resistance R 3 respectively through relay 4; resistance R 3 and R4 constitute a bleeder circuit, make resistance R 4 two ends get 1/26 of line voltage amplitude, and fuse F1 plays overcurrent protection.Resistance R 4 rear ends are connected the half-wave rectifying circuit of being made up of jointly diode D10, electrochemical capacitor EC1 and resistance R 5.Optical coupler G1 back-end circuit is made up of 5V power supply and resistance R 6, R7, R8 and triode N19013, will be converted to digital signal through the electrical network sampled signal after isolating.Electrical network just often, optical coupler G1 conducting, tie point 4 ground connection of resistance R 6 and R8, triode N1 base stage is a low level, N1 turn-offs, lead-out terminal DDS is+the 5V high level; When grid power blackout, not conducting of optical coupler G1, the tie point 4 of resistance R 6 and R8 links to each other with+5V power supply through resistance R 6, triode N1 base stage is a high level, triode N1 conducting, lead-out terminal DDS links to each other with ground behind triode N1, and lead-out terminal DDS is the 0V low level.
During grid power blackout, because the effect of storage capacitor still can make relay 4 be in normally off, until storage capacitor because the discharge, voltage is lower than the amplitude for coil power supply on it, has approximately during this period of time about 30min, enough allows solar automatic tracking system finish necessary operations.Behind grid power blackout; stand-by power supply UPS3 can switch automatically; start the battery system of self; be the solar automatic tracking system power supply; this moment, lead-out terminal DDS was output as low level; single-chip microcomputer 5PIC16F877 reads in the signal of lead-out terminal DDS by the I/O mouth; carry out the grid power blackout defence program; send the step motor control signal; this signal amplifies and carries out electrical isolation by isolating amplifier circuit 9 with signal; pass to stepper motor driver 10; stepper motor driver is exported three tunnel motor drive signal; control step motor 11; stepping motor 11 reduces rotating speed and improves rotating torque through reducing gear 12; here reducing gear is a decelerator; gear; worm and gear and electric pushrod; reducing gear 12 direct drawing rotation mechanisms 13; make solar photovoltaic array turn to the attitude of a safety; after the grid power blackout defence program executes; when the storage capacitor voltage for relay control coil power supply is lower than a threshold value, relay 4 will be in normally open, and solar automatic tracking system is thrown off from the UPS output; up to power system restoration power supply next time; relay 4 is in normally off again, and the tracking system power supply recovers automatically, switches to electrical network.
Claims (4)
1. energy cut protection device for solar automatically tracking system is characterized in that comprising power supply (1), electric network state testing circuit (2), UPS uninterrupted power supply (3), relay (4), with automatic tracking controller (5) and the motor executive system (6) of single-chip microcomputer PIC16F877 as microcontroller; The input of electric network state testing circuit (2) directly links to each other with electrical network, output links to each other with the I/O mouth of automatic tracking controller (5), UPS uninterrupted power supply (3) input port links to each other with electrical network, output links to each other with relay (4), relay (4) links to each other with the feeder ear of automatic tracking controller (5), and automatic tracking controller (5) links to each other with motor executive system (6); In the electric network state testing circuit (2): the sub-AUL2 of direct-flow input end, AUN2 are connected in parallel on the storage capacitor, are the control coil power supply of relay (4); Electrical network just often, storage capacitor charging makes relay (4) be in normally off; During grid power blackout, because the effect of storage capacitor, still can make relay (4) be in normally off, owing to discharge, voltage is lower than the amplitude for the control coil power supply on it until storage capacitor, when the storage capacitor voltage for the power supply of relay (4) control coil is lower than a threshold value, relay (4) will be in normally open, solar automatic tracking system is thrown off from the output of UPS uninterrupted power supply (3), and up to power system restoration power supply next time, relay (4) is in normally off again.
2. according to the described a kind of energy cut protection device for solar automatically tracking system of claim 1, it is characterized in that in the electric network state testing circuit (2): AC input terminal ACL, ACN link to each other with electrical network, are connected in parallel on simultaneously on the common of relay (4); Piezo-resistance R1 is connected in parallel between AC input terminal ACN and the earth, and piezo-resistance R2 is connected in parallel between AC input terminal ACL and the earth; Resistance R 3 and resistance R 4 series connection constitute bleeder circuit, its common point links to each other with the anode of diode D10, fuse F1 is connected between the negative electrode of the contact of relay (4) and electrochemical capacitor EC1, diode D10, electrochemical capacitor EC1 and current-limiting resistance R5 form half-wave rectifying circuit jointly, diode D10 is connected between resistance R 3 and the R5, electrochemical capacitor EC1 links to each other with the negative electrode of diode D10 and the 2 pin DW-of optical coupler TLP521 (G1) respectively, and resistance R 5 is connected between the 1 pin DW+ of the negative electrode of D10 and optical coupler TLP521 (G1); 3 pin of optical coupler TLP521 (G1) and 4 pin are the output of optical coupler TLP521 (G1), 3 pin link to each other with ground, 4 pin link to each other with+5V power supply through resistance R 6, the base stage of triode N1 links to each other with 4 pin of optical coupler TLP521 (G1) by resistance R 8, and the current collection of the triode N1 very lead-out terminal DDS of electric network state testing circuit passes through resistance R 7 and links to each other with+5V power supply.
3. according to the described a kind of energy cut protection device for solar automatically tracking system of claim 1, it is characterized in that in the motor executive system (6), motor control signal (8) is sent by automatic tracking controller, passes to motor control signal isolating amplifier circuit (9); The input side joint automatic tracking controller of motor control signal isolating amplifier circuit (9), outlet side links to each other with motor driver (10); Motor driver (10) is drive stepping motor (11) directly, and stepping motor (11) links to each other with gear in the reducing gear (12), through deceleration and the moment amplification after, driving machinery rotating mechanism (13) rotation.
4. according to the described a kind of energy cut protection device for solar automatically tracking system of claim 3, it is characterized in that in the motor control signal isolating amplifier circuit (9), motor control signal drives triode N11 through resistance R 9, resistance R 10 is connected in parallel between the base stage and ground GND of triode N11, and the emitter of triode N11 links to each other with ground GND; Collector electrode links to each other with 2 pin of optical coupler TLP521 (G2), 1 pin of optical coupler TLP521 (G2) links to each other with+5V power supply through pull-up resistor R6, the 3 pin ground connection DGND of optical coupler TLP521 (G2), 4 pin of optical coupler TLP521 (G2) link to each other with the DS+5V power supply through resistance R 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101768757A CN101399451B (en) | 2007-11-06 | 2007-11-06 | Energy cut protection device for solar automatically tracking system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101768757A CN101399451B (en) | 2007-11-06 | 2007-11-06 | Energy cut protection device for solar automatically tracking system |
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| Publication Number | Publication Date |
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| CN101399451A CN101399451A (en) | 2009-04-01 |
| CN101399451B true CN101399451B (en) | 2010-12-15 |
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| CN2007101768757A Expired - Fee Related CN101399451B (en) | 2007-11-06 | 2007-11-06 | Energy cut protection device for solar automatically tracking system |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011185316A (en) * | 2010-03-05 | 2011-09-22 | Yamatake Corp | Power source module during power failure |
| CN102428876A (en) * | 2011-09-23 | 2012-05-02 | 无锡艾德里安科技有限公司 | Energy-saving and environment-protecting automatic food feeder |
| CN102497197A (en) * | 2011-12-28 | 2012-06-13 | 中冶南方（武汉）自动化有限公司 | Isolated bidirectional digital input output circuit |
| CN202798128U (en) * | 2012-09-17 | 2013-03-13 | 周锡卫 | Independent photovoltaic power supply system with self-starting function |
| CN104917403A (en) * | 2015-05-25 | 2015-09-16 | 张家港市华为电子有限公司 | Automatic switching circuit in power supply applicable to 220V and 110V power grids |
| CN105262351B (en) * | 2015-08-27 | 2019-07-19 | 许继集团有限公司 | A kind of more level driving circuits |
| CN112018720A (en) * | 2019-05-31 | 2020-12-01 | 核工业理化工程研究院 | Power failure protection method and protection system of power supply system based on PLC control |
| CN111337032A (en) * | 2020-03-23 | 2020-06-26 | 黄河勘测规划设计研究院有限公司 | Circulating corner reflector and satellite tracking method thereof |
| CN112271990A (en) * | 2020-10-28 | 2021-01-26 | 无锡昊阳新能源科技有限公司 | Photovoltaic system, adjusting bracket subsystem, control assembly and working method of photovoltaic system |
| CN114629228B (en) * | 2022-04-13 | 2023-04-25 | 南京晓庄学院 | Power supply system of single-phase online UPS |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2137822Y (en) * | 1992-07-02 | 1993-07-07 | 张恩侗 | Fully-automatic tracing type tv antenna |
| CN2640092Y (en) * | 2003-06-26 | 2004-09-08 | 严昌训 | Instantaneous power cut protector for electric motor |
| CN1677296A (en) * | 2004-03-29 | 2005-10-05 | 中国科学院大气物理研究所 | Step-by-step motor controlling interface of solar tracing instrument system and 2-D solar tracing instrument |
| CN2791552Y (en) * | 2005-04-28 | 2006-06-28 | 中国科学院合肥物质科学研究院 | Sun tracking device based on tracking gesture feedback |
| CN1928460A (en) * | 2006-09-28 | 2007-03-14 | 宁波新亚机电有限公司 | Solar automatic tracking circuit |
-
2007
- 2007-11-06 CN CN2007101768757A patent/CN101399451B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2137822Y (en) * | 1992-07-02 | 1993-07-07 | 张恩侗 | Fully-automatic tracing type tv antenna |
| CN2640092Y (en) * | 2003-06-26 | 2004-09-08 | 严昌训 | Instantaneous power cut protector for electric motor |
| CN1677296A (en) * | 2004-03-29 | 2005-10-05 | 中国科学院大气物理研究所 | Step-by-step motor controlling interface of solar tracing instrument system and 2-D solar tracing instrument |
| CN2791552Y (en) * | 2005-04-28 | 2006-06-28 | 中国科学院合肥物质科学研究院 | Sun tracking device based on tracking gesture feedback |
| CN1928460A (en) * | 2006-09-28 | 2007-03-14 | 宁波新亚机电有限公司 | Solar automatic tracking circuit |
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