CN107733028A - A kind of anti-reverse apparatus and system of solar panels - Google Patents
A kind of anti-reverse apparatus and system of solar panels Download PDFInfo
- Publication number
- CN107733028A CN107733028A CN201711042703.0A CN201711042703A CN107733028A CN 107733028 A CN107733028 A CN 107733028A CN 201711042703 A CN201711042703 A CN 201711042703A CN 107733028 A CN107733028 A CN 107733028A
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- triode
- driving unit
- switch
- reverse
- solar panel
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- 239000003990 capacitor Substances 0.000 claims description 6
- 230000005669 field effect Effects 0.000 claims description 2
- 230000008878 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 102100023661 Coiled-coil domain-containing protein 115 Human genes 0.000 description 2
- 101710155594 Coiled-coil domain-containing protein 115 Proteins 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 101100273664 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) ccp-1 gene Proteins 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0034—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using reverse polarity correcting or protecting circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The present invention relates to controller for solar field, and in particular to a kind of anti-reverse apparatus and system of solar panels.A kind of counnter attack connection device of solar panels, the counnter attack connection device include control unit, driver element, transformer and on-off switch；Described control unit is arranged in controller for solar, and is connected with driver element；The primary coil of the transformer is connected with driver element, and its secondary coil is connected with on-off switch；The on-off switch is arranged between the positive terminal of solar panels and negative pole end, and the on-off switch turns off operation according to the second voltage after change, and cuts off the charge circuit of solar panels.The present invention, using optical coupling technology, prevents solar panels reversal connection and endangers controller for solar system by setting on-off switch, and the drive circuit of driving on-off switch work between solar panels and controller for solar.
Description
Technical Field
The invention relates to the field of solar controllers, in particular to an anti-reverse connection device and system for a solar panel.
Background
The solar controller is a solar energy charge and discharge controller, and is an automatic control device used in a solar power generation system to control a plurality of solar panels to charge a storage battery and the storage battery to supply power to a solar inverter load. The solar photovoltaic power supply system regulates and controls the charging and discharging conditions of the storage battery, controls the solar panel and the storage battery to output the electric energy of the load according to the power supply requirement of the load, and is a core control part of the whole photovoltaic power supply system.
However, in practical operation, the solar panel is easily connected reversely, and an anti-reverse connection circuit and a driving circuit for driving the anti-reverse connection circuit are required. Referring to fig. 1 specifically, the solar controller controls the U5 to indirectly control the driving circuit through CCP1, and controls the driving circuit through DR _ PV, the solar panel is connected to the controller through a connection terminal on the controller, the anode of the solar panel is connected to the reverse connection prevention circuit through PV +, and the cathode of the solar panel is connected to the reverse connection prevention circuit through BATGND; specifically, when the solar panel is reversely connected after Q1 and Q8 are disconnected, Q1 and Q8 are equivalent to a resistance which prevents a large impedance, so that the charging loop is cut off, and when Q1 and Q8 are opened, the resistances of Q1 and Q8 are small, so that the current at the end of the solar panel can pass through.
However, the driving circuit for driving the reverse-connection preventing circuit to operate has the following disadvantages:
1. the number of components is large;
2. the control needs two single-chip IO ports for control;
3. when the voltage of the solar panel rises, the requirement on the voltage-resistant grade of electronic components in the driving circuit can be improved, namely the solar panel is connected in series more and more, and the voltage grade which can be accessed to the controller is improved.
How to meet the requirement of the market on a higher solar panel voltage access controller and simultaneously enable the implementation method to reduce the cost and improve the stability compared with the currently used method is a problem which is always intensively researched by technical personnel in the field.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an anti-reverse connection device and system for a solar panel, aiming at the defects in the prior art, and solving the problems that the existing driving anti-reverse connection circuit has more driving circuit components, more control ports, high requirement on hardware for high voltage conditions, high cost and low stability.
The technical scheme adopted by the invention for solving the technical problems is as follows: the anti-reverse connection device of the solar panel is provided, the solar panel is connected with a solar controller, and the anti-reverse connection device comprises a control unit, a driving unit, a transformer and an on-off switch; the control unit is arranged in the solar controller and is connected with the driving unit; the primary coil of the transformer is connected with the driving unit, the secondary coil of the transformer is connected with the on-off switch, and the driving unit changes a first voltage input to the primary coil and changes a second voltage of the secondary coil according to a control signal of the control unit; the on-off switch is arranged between the positive end and the negative end of the solar panel and is used for carrying out off operation according to the changed second voltage and cutting off a charging loop of the solar panel.
The technical scheme adopted by the invention for solving the technical problems is as follows: the anti-reverse connection system of the solar panel is provided and comprises the solar panel, a solar controller and an anti-reverse connection device, wherein the anti-reverse connection device comprises a control unit, a driving unit, a transformer and an on-off switch; the control unit is arranged in the solar controller and is connected with the driving unit; the primary coil of the transformer is connected with the driving unit, the secondary coil of the transformer is connected with the on-off switch, and the driving unit changes a first voltage input to the primary coil and changes a second voltage of the secondary coil according to a control signal of the control unit; the on-off switch is arranged between the positive end and the negative end of the solar panel and is used for carrying out off operation according to the changed second voltage and cutting off a charging loop of the solar panel.
Compared with the prior art, the solar energy controller has the advantages that the on-off switch and the driving circuit for driving the on-off switch to work are arranged between the solar panel and the solar energy controller, and the solar energy controller system is prevented from being damaged due to the fact that the solar panel is reversely connected by adopting the optical coupling technology; furthermore, the on-off switch and the driving circuit have the advantages of simple structure, low cost and high stability, and simultaneously solve the problem that the existing driving circuit can only be stably used when the voltage of the solar panel is not higher than 150V, and the requirement of the high voltage of the solar panel on the anti-seize of components of the driving circuit is not required to be considered.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic structural diagram of an anti-reverse connection device of a prior solar panel;
FIG. 2 is a schematic structural diagram of an anti-reverse connection device of a solar panel according to the present invention;
fig. 3 is a schematic circuit diagram of the reverse-connection preventing device for the solar panel of the present invention.
Detailed Description
The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 2, the present invention provides a preferred embodiment of an anti-reverse apparatus for a solar panel. FIG. 2 is a schematic structural diagram of an anti-reverse connection device of a solar panel according to the present invention.
The utility model provides a solar panel 20 prevents reverse-connection device, is applied to among the solar control system, and solar panel 20 is connected with solar control ware 10, prevent reverse-connection device includes control unit 11, drive unit 31, transformer 32 and on-off switch 33, control unit 11 sets up in solar control ware 10 to be connected with drive unit 31, the primary coil and the drive unit 31 of transformer 32 are connected, and its secondary coil is connected with on-off switch 33, on-off switch 33 sets up between solar panel 20's positive terminal and negative pole end.
Specifically, the driving unit 31 changes a first voltage input to the primary coil and changes a second voltage of the secondary coil according to a control signal of the control unit 11; the on-off switch 33 performs an off operation according to the changed second voltage and cuts off the charging circuit of the solar panel 20.
The solar control system is composed of a solar panel, a storage battery, a controller and a load. Further, the solar controller 10 is a device for controlling the photovoltaic panel to charge the battery and providing a load control voltage to the voltage sensitive device. The solar photovoltaic power supply system regulates and controls the charging and discharging conditions of the storage battery, controls the solar battery assembly and the storage battery to output electric energy to the load according to the power supply requirement of the load, and is a core control part of the whole photovoltaic power supply system. And almost all solar power systems powered by batteries, require extremely high levels of a solar charge-discharge controller which acts to regulate the power delivered from the solar panel to the battery, the battery overshooting, at least significantly reducing battery life, from the worst damaging the battery until it is unable to function properly.
The Transformer 32(Transformer) is a device that changes an ac voltage by using the principle of electromagnetic induction, and its main components are a primary coil, a secondary coil, and an iron core (magnetic core). The main functions are as follows: voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization (magnetic saturation transformer 32), and the like.
Preferably, the transformer 32 is a step-down transformer 32.
As shown in fig. 3, the present invention provides a preferred embodiment of an anti-reverse apparatus for a solar panel. Fig. 3 is a schematic circuit diagram of the reverse-connection preventing device for the solar panel of the present invention.
A voltage output end of the driving unit 31 is connected with a first capacitor in series and then is connected with an input end of a primary coil, an output end of the primary coil is connected with a ground end or a voltage input end of the driving unit 31, and an enable end of the driving unit 31 is connected with a control end of the control unit 11; the control unit 11 sends a control signal to an enable terminal of the driving unit 31, and the driving unit 31 boosts the first voltage input to the primary coil according to the control signal received by the enable terminal.
In the present embodiment, the control unit 11 generates a PWM waveform and inputs the PWM waveform to the enable terminal of the driving unit 31 through the control terminal, and the driving unit 31 generates a square wave signal at the primary coil and enhances the voltage value of the square wave signal according to the received PWM waveform. The on-off switch 33 comprises a first triode and a second triode, the source electrodes of the first triode and the second triode are both connected with the positive end of the solar panel 20, the source electrodes and the grid electrodes of the first triode and the second triode are respectively connected with the two ends of the secondary coil, and the drain electrodes of the first triode and the second triode are connected with each other; and when the second voltage of the secondary coil is increased, the first triode and the second triode are disconnected. And, the reverse connection preventing device further includes a rectifying circuit provided between the secondary coil and the on-off switch 33.
In the present embodiment, the control unit 11 generates a PWM waveform and inputs the PWM waveform to the enable terminal of the driving unit 31 through the control terminal, and the driving unit 31 generates a square wave signal at the primary coil and enhances the voltage value of the square wave signal according to the received PWM waveform; the secondary coil generates a square wave signal according to the square wave signal generated at the primary coil, and the rectifying circuit rectifies the square wave signal into driving voltages acting on the source electrodes and the grid electrodes of the first triode and the second triode. Preferably, the first triode and the second triode are both field effect transistors. And the control unit 11 is a main control chip of the solar controller 10.
Referring to fig. 3, the driving unit 31 includes a logic module U3, a pin 3(IN terminal) of the logic module U3 is connected to a pin CCP1 of the control unit 11, a pin 5(OUT terminal) of the logic module U3 is connected to a 1 terminal of a transformer 32TT2, and a pin 4(GND terminal) of the logic module U3 is connected to a 4 terminal of the transformer 32TT 2; a capacitor C19 is connected in series between the pin 5(OUT terminal) of the logic module U3 and the terminal 1 of the transformer 32TT2, and a BatGND terminal is connected in parallel between the pin 4(GND terminal) of the logic module U3 and the terminal 4 of the transformer 32TT 2. After an 8-port of the transformer 32TT2 is connected with a capacitor C20 in series, one path of the current is connected to the grid electrodes of the triode Q1 and the triode Q8 through a diode D14(2), a resistor R19 is connected in parallel between the source electrodes of the triode Q1 and the triode Q8, and a capacitor C18 is connected in parallel between the source electrodes of the triode Q1 and the source electrode of the triode Q8; the 5 end of the transformer 32TT2 is respectively connected to the source electrodes of the triode Q1 and the triode Q8, and a diode D14(1) is connected in series between the 5 end of the transformer 32TT 3578 and the 8 end of the transformer 32TT2, wherein the diode D14(2) is in positive connection relative to the 8 end of the transformer 32TT2, and the diode D14(1) is in reverse connection relative to the 8 end of the transformer 32TT 2. The positive pole of solar panel 20 inserts PV + department to insert triode Q1 and the source play of triode Q8 respectively, and the drain-source resistance of triode Q1 and triode Q8 interconnect.
According to the circuit description above, the control unit 11 generates a PWM waveform with a frequency of 30Khz and transmits it to pin 3(IN terminal) of the logic module U3 via pin CCP 1. The logic block U3 receives the PWM waveform, generates or boosts the PWM waveform to a square wave with a voltage amplitude of 12V and a frequency of 30Khz, and transmits the square wave to the 1 terminal of the transformer 32TT2 through the pin 5(OUT terminal) of the logic block U3. Also, a square wave of lower or nearly lower voltage amplitude is generated at the secondary winding of the transformer 32TT 2. A driving voltage with a voltage amplitude of about 10V is formed by rectification through the rectifying circuit (the capacitor C20, the diode D14(2), and the diode D14(1)), and is applied to the source and the gate of the transistor Q1 and the transistor Q8.
The invention also provides a preferred embodiment of the reverse connection preventing system of the solar panel.
An anti-reverse connection system of a solar panel 20 comprises the solar panel 20, a solar controller 10 and an anti-reverse connection device, wherein the anti-reverse connection device comprises a control unit 11, a driving unit 31, a transformer 32 and an on-off switch 33; wherein the control unit 11 is arranged in the solar controller 10 and is connected with the driving unit 31; the primary coil of the transformer 32 is connected with the driving unit 31, the secondary coil of the transformer is connected with the on-off switch 33, and the driving unit 31 changes the first voltage input to the primary coil and changes the second voltage of the secondary coil according to the control signal of the control unit 11; the on-off switch 33 is disposed between the positive terminal and the negative terminal of the solar panel 20, and the on-off switch 33 performs a disconnection operation according to the changed second voltage and cuts off the charging loop of the solar panel 20.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, but rather as embodying the invention in a wide variety of equivalent variations and modifications within the scope of the appended claims.
Claims (9)
1. The utility model provides a solar panel's anti-reverse connection device, solar panel and solar controller are connected which characterized in that: the reverse connection preventing device comprises a control unit, a driving unit, a transformer and an on-off switch; wherein,
the control unit is arranged in the solar controller and is connected with the driving unit;
the primary coil of the transformer is connected with the driving unit, the secondary coil of the transformer is connected with the on-off switch, and the driving unit changes a first voltage input to the primary coil and changes a second voltage of the secondary coil according to a control signal of the control unit;
the on-off switch is arranged between the positive end and the negative end of the solar panel and is used for carrying out off operation according to the changed second voltage and cutting off a charging loop of the solar panel.
2. The reverse-connection preventing device according to claim 1, characterized in that: the voltage output end of the driving unit is connected with the input end of the primary coil after being connected with the first capacitor in series, the output end of the primary coil is connected with the ground end or the voltage input end of the driving unit, and the enabling end of the driving unit is connected with the control end of the control unit; the control unit sends a control signal to an enabling end of the driving unit, and the driving unit strengthens a first voltage input to the primary coil according to the control signal received by the enabling end.
3. The reverse-connection preventing device according to claim 2, characterized in that: the control unit generates a PWM waveform and inputs the PWM waveform to the enabling end of the driving unit through the control end, and the driving unit generates a square wave signal at the primary coil and enhances the voltage value of the square wave signal according to the received PWM waveform.
4. The reverse-connection preventing device according to claim 1, characterized in that: the on-off switch comprises a first triode and a second triode, the source electrodes of the first triode and the second triode are both connected with the positive end of the solar panel, the source electrodes and the grid electrodes of the first triode and the second triode are respectively connected with the two ends of the secondary coil, and the drain electrodes of the first triode and the second triode are mutually connected; and when the second voltage of the secondary coil is increased, the first triode and the second triode are disconnected.
5. The reverse-connection preventing device according to claim 4, characterized in that: the reverse connection preventing device further comprises a rectifying circuit, and the rectifying circuit is arranged between the secondary coil and the on-off switch.
6. The reverse-connection preventing device according to claim 5, characterized in that: the control unit generates a PWM waveform and inputs the PWM waveform to an enabling end of the driving unit through a control end, the driving unit generates a square wave signal at the primary coil and enhances the voltage value of the square wave signal according to the received PWM waveform; the secondary coil generates a square wave signal according to the square wave signal generated at the primary coil, and the rectifying circuit rectifies the square wave signal into driving voltages acting on the source electrodes and the grid electrodes of the first triode and the second triode.
7. The reverse-connection preventing device according to claim 4, characterized in that: the first triode and the second triode are both field effect transistors.
8. The reverse-connection preventing device according to claim 1, characterized in that: the control unit is a main control chip of the solar controller.
9. The utility model provides a solar panel's anti-reverse connection system which characterized in that: the anti-reverse connection system comprises a solar panel, a solar controller and an anti-reverse connection device, wherein the anti-reverse connection device comprises a control unit, a driving unit, a transformer and an on-off switch; wherein,
the control unit is arranged in the solar controller and is connected with the driving unit;
the primary coil of the transformer is connected with the driving unit, the secondary coil of the transformer is connected with the on-off switch, and the driving unit changes a first voltage input to the primary coil and changes a second voltage of the secondary coil according to a control signal of the control unit;
the on-off switch is arranged between the positive end and the negative end of the solar panel and is used for carrying out off operation according to the changed second voltage and cutting off a charging loop of the solar panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711042703.0A CN107733028A (en) | 2017-10-30 | 2017-10-30 | A kind of anti-reverse apparatus and system of solar panels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711042703.0A CN107733028A (en) | 2017-10-30 | 2017-10-30 | A kind of anti-reverse apparatus and system of solar panels |
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| Publication Number | Publication Date |
|---|---|
| CN107733028A true CN107733028A (en) | 2018-02-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711042703.0A Pending CN107733028A (en) | 2017-10-30 | 2017-10-30 | A kind of anti-reverse apparatus and system of solar panels |
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| Country | Link |
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| CN (1) | CN107733028A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109391021A (en) * | 2018-11-27 | 2019-02-26 | 每天蓝(深圳)科技有限公司 | Cell anti-reverse fills the control device and solar energy MPPT control system of switch |
| CN113785461A (en) * | 2020-12-29 | 2021-12-10 | 深圳欣锐科技股份有限公司 | Vehicle-mounted driving reverse connection prevention device and equipment |
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| CN109391021A (en) * | 2018-11-27 | 2019-02-26 | 每天蓝(深圳)科技有限公司 | Cell anti-reverse fills the control device and solar energy MPPT control system of switch |
| CN113785461A (en) * | 2020-12-29 | 2021-12-10 | 深圳欣锐科技股份有限公司 | Vehicle-mounted driving reverse connection prevention device and equipment |
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Address after: 518000 Guangdong, Shenzhen, Baoan District, Baoan District City, the third floor of the community of 13A, Wutong Industrial Park, 4 layers and 5 stories. Applicant after: Shenzhen Shuorixin Energy Technology Co.,Ltd. Address before: 4-5F, Building 13A, Taihua wutong Industrial Park, Gushu Development Zone, Hangcheng Street, Bao'an District, Shenzhen, Guangdong 518000 Applicant before: SHENZHEN SHUORI NEW ENERGY TECHNOLOGY Co.,Ltd. |