CN108666977A - A kind of photovoltaic switching off device tandem drive circuit - Google Patents
A kind of photovoltaic switching off device tandem drive circuit Download PDFInfo
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- CN108666977A CN108666977A CN201810697610.XA CN201810697610A CN108666977A CN 108666977 A CN108666977 A CN 108666977A CN 201810697610 A CN201810697610 A CN 201810697610A CN 108666977 A CN108666977 A CN 108666977A
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- switching tube
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- 238000010586 diagram Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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
- H02H7/10—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 converters; for rectifiers
- H02H7/12—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 converters; for rectifiers for static converters or rectifiers
- H02H7/1213—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 converters; for rectifiers for static converters or rectifiers for DC-DC converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Protection Of Static Devices (AREA)
- Electronic Switches (AREA)
Abstract
The invention discloses a kind of photovoltaic switching off device tandem drive circuits, including photovoltaic module VPV, input capacitance C4 and control unit；The input capacitance C4 and photovoltaic module VPV is connected in parallel, and the anode of the photovoltaic module VPV is connect with first lead-out terminal 11, and the switching tube that the cathode of the photovoltaic module VPV is connected in series with by two is connected with second output terminal 12；Described two switching tubes being connected in series with are connected with described control unit；One end of the output capacitance C5 connects first lead-out terminal, the other end connection second output terminal of the output capacitance C5；The both ends of the output capacitance C5 are connected in parallel to sustained diode 1 and output resistance R1.The present invention effectively improves system reliability, High voltage output will not occurs because of single switching transistor, avoid causing personal safety hidden danger, and at low cost, and reliability is high.
Description
Technical field
The present invention relates to a kind of photovoltaic circuit more particularly to a kind of photovoltaic switching off device tandem drive circuits, belong to electric power electricity
Sub- converter technical field.
Background technology
It rapidly switches off, is the photovoltaic plant safeguard protection concept introduced from the U.S..The it is proposed for rapidly switching off concept, for right
Fire fighter, photovoltaic plant installation and the protection of maintenance personal, because photovoltaic plant DC side has high direct voltage, as long as there is the sun
Irradiation, the high direct voltage of solar panel side just always exist, once fire occurs for photovoltaic plant, before entire power station has been burnt,
Fire fighter can not carry out fire extinguishing rescue.
Therefore, photovoltaic plant DC side is rapidly switched off in National Electrical specification NEC 2014 and NEC 2017 and is all carried
Go out and has been distinctly claimed.It will start formal execute on January 1st, 2019.NEC 2017 is provided：" except string formation, controller installation
In the range of within 0.3 meter of distance arrays and being more than 1 meter apart from access point, after rapidly switching off, system needs 30 seconds
Inside it is down to 30V；Within string formation, it is down to 80V in 30 seconds, conveniently takes safe rescue measure.”
Invention content
Technical problem to be solved by the invention is to provide a kind of photovoltaic switching off device tandem drive circuits, it is ensured that system
Safety, at low cost, reliability is high, easy to implement, meets Code of Federal Regulations and rapidly switches off safety requirements.
The present invention is to solve above-mentioned technical problem and the technical solution adopted is that provide a kind of photovoltaic switching off device tandem drive
Circuit, including photovoltaic module VPV, input capacitance C4 and control unit；The input capacitance C4 is in parallel with photovoltaic module VPV to be connected
It connects, the anode of the photovoltaic module VPV is connect with first lead-out terminal 1-1, and the cathode of the photovoltaic module VPV is gone here and there by two
The switching tube of connection connection is connected with the sub- 1-2 of second output terminal；Described two switching tubes being connected in series with and described control unit phase
Even；One end of the output capacitance C5 connects first lead-out terminal, and the other end of the output capacitance C5 connects second output terminal
Son；The both ends of the output capacitance C5 are connected in parallel to sustained diode 1 and output resistance R1.
Above-mentioned photovoltaic switching off device tandem drive circuit, wherein described two switching tubes being connected in series with are first switch
The cathode of pipe Q1 and second switch pipe Q2, the photovoltaic module VPV are connected with the drain electrode of first switch pipe Q1, the first switch
The drain electrode of the source electrode and second switch pipe Q2 of pipe Q1 is connected together to form MID drivings end；The source electrode of the second switch pipe Q2
It is connected with the sub- 1-2 of second output terminal；The base stage of the first switch pipe Q1 passes through the first driving circuit and described control unit phase
Even, the base stage of the second switch pipe Q2 is connected by the second driving circuit with described control unit.
Above-mentioned photovoltaic switching off device tandem drive circuit, wherein first driving circuit includes switching tube Q4, switching tube
Q3 and switching tube Q5；The switching tube Q4 emitters are connected with VCC voltage ends, connect between the switching tube Q4 emitters and base stage
It is connected to resistance R2；The switching tube Q4 base stages are connected by resistance R3 with the collector of switching tube Q3；The hair of the switching tube Q3
Emitter grounding, the base stage of the switching tube Q3 by resistance R4 with and described control unit be connected；The current collection of the switching tube Q4
It is connected with the anode of diode D2 after the series resistor R5 of pole；The base stage of the cathode of the diode D2 and first switch pipe Q1 are opened
The emitter for closing pipe Q5 is connected；The base stage of the grounded collector of the switching tube Q5, the switching tube Q5 is grounded by resistance R6.
Above-mentioned photovoltaic switching off device tandem drive circuit, wherein second driving circuit includes switching tube Q6, switching tube
Q7 and switching tube Q8；It is connected with VCC voltage ends after the switching tube Q6 emitter series diodes D4, the switching tube Q6 transmittings
Resistance R7 is connected between pole and base stage；The switching tube Q6 base stages are connected by resistance R8 with the collector of switching tube Q7；Institute
The emitter for stating switching tube Q7 is connected with MID drivings end, and the base stage of the switching tube Q7 is connected with the cathode of diode D5；It is described
The anode of diode D5 by resistance R11 with and described control unit be connected；The collector series connection resistance R9 of the switching tube Q6
It is connected afterwards with the anode of diode D3；The transmitting of the cathode of the diode D3 and the base stage, switching tube Q8 of second switch pipe Q2
Extremely it is connected；The collector of the switching tube Q8 is connected with MID drivings end, is connected between the collector and base stage of the switching tube Q8
There is resistance R10.
The present invention, which compares the prior art, following advantageous effect：Photovoltaic switching off device tandem drive electricity provided by the invention
Road can effectively improve system reliability, will not occur High voltage output because of the damage of single switching transistor, avoid causing people
Body security risk, safety is good, and reliability is high, and at low cost, efficient.
Description of the drawings
Fig. 1 is a kind of photovoltaic switching off device tandem drive circuit diagram in the embodiment of the present invention；
Fig. 2 is the drive circuit schematic diagram of the first switch pipe Q1 of the photovoltaic switching off device in the embodiment of the present invention；
Fig. 3 is the drive circuit schematic diagram of the second switch pipe Q2 of the photovoltaic switching off device in the embodiment of the present invention；
Fig. 4 is photovoltaic switching off device tandem drive circuit and control unit connection diagram in the embodiment of the present invention.
Specific implementation mode
A kind of photovoltaic switching off device tandem drive circuit in the embodiment of the present invention, safety is good, at low cost, good reliability.
It is understandable to enable above-mentioned purpose, feature and the advantageous effect of the present invention to become apparent, below in conjunction with the accompanying drawings to this
The specific example of invention is described in detail.
Referring to FIG. 1, photovoltaic switching off device tandem drive circuit provided by the invention, including photovoltaic module VPV, input capacitance
C4 and control unit；The input capacitance C4 and photovoltaic module VPV is connected in parallel, the anode and first of the photovoltaic module VPV
Leading-out terminal 1-1 connections, the switching tube that the cathode of the photovoltaic module VPV is connected in series with by two and the sub- 1- of second output terminal
2 are connected；Described two switching tubes being connected in series with are connected with described control unit；One end connection first of the output capacitance C5
Leading-out terminal, the other end connection second output terminal of the output capacitance C5；The both ends of the output capacitance C5 are connected in parallel
There are sustained diode 1 and output resistance R1.
Photovoltaic switching off device tandem drive circuit provided by the invention, the switching tube being connected in series with using two are driven,
The reliability and safety of system is greatly improved, it will not be in the case where switching off device turns off, because single tube failure causes output to have
High pressure occurs；When there is fire, the life security of fire fighter will not be influenced because of system high pressure.
Preferably, two switching tubes being connected in series with are respectively first switch pipe Q1 and second switch pipe Q2, photovoltaic module
The cathode of VPV is connected with the drain electrode of first switch pipe Q1, and the source electrode of first switch pipe Q1 is connected with the drain electrode of second switch pipe Q2
MID is formed together drives end；The source electrode of second switch pipe Q2 is connected with the sub- 1-2 of second output terminal；The base of first switch pipe Q1
Pole is connected by the first driving circuit with described control unit, and the base stage of second switch pipe Q2 passes through the second driving circuit and described
Control unit is connected.
Continuing with referring to Fig. 2, the first driving circuit of the invention includes switching tube Q4, switching tube Q3 and switching tube Q5；Institute
It states switching tube Q4 emitters with VCC voltage ends to be connected, resistance R2 is connected between the switching tube Q4 emitters and base stage；It is described
Switching tube Q4 base stages are connected by resistance R3 with the collector of switching tube Q3；The emitter of the switching tube Q3 is grounded, described to open
Close the base stage of pipe Q3 by resistance R4 with and described control unit be connected；After the collector series connection resistance R5 of the switching tube Q4 with
The anode of diode D2 is connected；The cathode of the diode D2 and the base stage of first switch pipe Q1, the emitter phase of switching tube Q5
Even；The base stage of the grounded collector of the switching tube Q5, the switching tube Q5 is grounded by resistance R6.
Continuing with referring to Fig. 3, the second driving circuit of the invention is mainly by switching tube Q6, switching tube Q7 and switching tube Q8 etc.
Discrete component is built, only several triodes, diode, and resistance can complete driving, simple in structure, need not use
Special suspended power supply driving chip, it is at low cost, it is efficient.First driving circuit and the second driving circuit are essentially the same, and first
Driving circuit has lacked diode D4, D5.Wherein, Q2, Q3, Q4 are NPN triode, and Q5, Q6 are PNP triode.Second driving electricity
Road concrete composition connection is as follows：It is connected with switching tube Q6 emitters after VCC voltage ends series winding diode D4, resistance R7 and switching tube
Q6 emitters and base stage are in parallel；The switching tube Q6 base stages are connected with the one end resistance R7, the current collection of other end and switching tube Q7
Extremely it is connected；The emitter of the switching tube Q7 is connected with MID drivings end, and base stage is connected with the cathode of diode D5；Two pole
The anode of pipe D5 is connected with the one end resistance R11；The other end of the resistance R11 is connected with control signal PA1；The switching tube
It is connected with the anode of diode D3 after Q6 collector string resistances R9；The cathode of the diode D3 and switching tube Q2 base stages, switch
The emitter of pipe Q8 is connected；The switching tube Q8 collectors are connected with MID drivings end, and emitter and base stage and diode D3 are simultaneously
Connection；The resistance R10 mono- terminates switching tube base stage, and other end is connected with MID drivings end.
The photovoltaic switching off device tandem drive circuit of the present invention is connect with control unit as shown in figure 4, working as first switch pipe Q1
Or second switch pipe Q2, because when a variety of causes short circuit, the company of photovoltaic module and bus can be cut off by closing a switching tube
It connects, no output high pressure；When there is fire, switching off device does not receive signal, and it is low level that control unit, which exports PA0 and PA1 all,
Switching tube Q3 and Q7 cut-off, switching tube Q4 and Q6 is without base current, and collector cut-off, emitter is without output；When first switch pipe
When Q1 and second switch pipe Q2 level are higher than switching tube Q4 and Q6 emitter voltage, switching tube Q5 and Q8 conducting, first switch pipe
Q1 and the electric discharge of second switch pipe Q2 base stages, first switch pipe Q1 and the Q2 cut-offs of second switch pipe, first lead-out terminal 1-1 and second
Voltage between leading-out terminal 1-2 is less than 1V.
Photovoltaic switching off device tandem drive circuit provided by the invention, safety is good, and reliability is high；And it is at low cost, it is efficient.
The present invention can effectively improve system reliability, and it is defeated high pressure will not occur because of single switching transistor (Q1) or (Q2) damage
Go out, avoids causing personal safety hidden danger.The drain electrode of second switch pipe Q2 is not connected to the ground, but with the source of first switch pipe Q1
Extremely it is connected, therefore second switch pipe Q2 needs the driving that suspends, second switch pipe Q2 driving circuits only to increase than common driver circuit
Add two diodes, at low cost, reliability is high.
Although the present invention is disclosed as above with preferred embodiment, however, it is not to limit the invention, any this field skill
Art personnel, without departing from the spirit and scope of the present invention, when can make a little modification and it is perfect, therefore the present invention protection model
It encloses to work as and is subject to what claims were defined.
Claims (4)
1. a kind of photovoltaic switching off device tandem drive circuit, which is characterized in that including：
Photovoltaic module VPV, input capacitance C4 and control unit；
The input capacitance C4 and photovoltaic module VPV is connected in parallel, anode and the first lead-out terminal 1- of the photovoltaic module VPV
1 connection, the switching tube that the cathode of the photovoltaic module VPV is connected in series with by two are connected with the sub- 1-2 of second output terminal；It is described
Two switching tubes being connected in series with are connected with described control unit；
One end of the output capacitance C5 connects first lead-out terminal, and the other end of the output capacitance C5 connects second output terminal
Son；The both ends of the output capacitance C5 are connected in parallel to sustained diode 1 and output resistance R1.
2. photovoltaic switching off device tandem drive circuit according to claim 1, which is characterized in that described two to be connected in series with
Switching tube is the drain electrode of the cathode and first switch pipe Q1 of first switch pipe Q1 and second switch pipe Q2, the photovoltaic module VPV
It is connected, the drain electrode of the source electrode and second switch pipe Q2 of the first switch pipe Q1 is connected together to form MID drivings end；Described
The source electrode of two switching tube Q2 is connected with the sub- 1-2 of second output terminal；The base stage of the first switch pipe Q1 passes through the first driving circuit
It is connected with described control unit, the base stage of the second switch pipe Q2 is connected by the second driving circuit with described control unit.
3. photovoltaic switching off device tandem drive circuit according to claim 2, which is characterized in that the first driving circuit packet
Include switching tube Q4, switching tube Q3 and switching tube Q5；The switching tube Q4 emitters are connected with VCC voltage ends, the switching tube Q4
Resistance R2 is connected between emitter and base stage；The collector phase that the switching tube Q4 base stages pass through resistance R3 and switching tube Q3
Even；The emitter of the switching tube Q3 is grounded, the base stage of the switching tube Q3 by resistance R4 with and described control unit be connected；
It is connected with the anode of diode D2 after the collector series connection resistance R5 of the switching tube Q4；The cathode and first of the diode D2
The base stage of switching tube Q1, the emitter of switching tube Q5 are connected；The grounded collector of the switching tube Q5, the base of the switching tube Q5
Pole is grounded by resistance R6.
4. photovoltaic switching off device tandem drive circuit according to claim 2, which is characterized in that the second driving circuit packet
Include switching tube Q6, switching tube Q7 and switching tube Q8；After the switching tube Q6 emitter series diodes D4 with VCC voltage end phases
Even, it is connected with resistance R7 between the switching tube Q6 emitters and base stage；The switching tube Q6 base stages pass through resistance R8 and switch
The collector of pipe Q7 is connected；The emitter of the switching tube Q7 is connected with MID drivings end, base stage and two poles of the switching tube Q7
The cathode of pipe D5 is connected；The anode of the diode D5 by resistance R11 with and described control unit be connected；The switching tube Q6
Collector series connection resistance R9 after be connected with the anode of diode D3；The base of the cathode and second switch pipe Q2 of the diode D3
Pole, the emitter of switching tube Q8 are connected；The collector of the switching tube Q8 is connected with MID drivings end, the collection of the switching tube Q8
Resistance R10 is connected between electrode and base stage.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810697610.XA CN108666977A (en) | 2018-06-29 | 2018-06-29 | A kind of photovoltaic switching off device tandem drive circuit |
| PCT/CN2018/115017 WO2020000862A1 (en) | 2018-06-29 | 2018-11-12 | Photovoltaic shutoff device series driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810697610.XA CN108666977A (en) | 2018-06-29 | 2018-06-29 | A kind of photovoltaic switching off device tandem drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108666977A true CN108666977A (en) | 2018-10-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810697610.XA Pending CN108666977A (en) | 2018-06-29 | 2018-06-29 | A kind of photovoltaic switching off device tandem drive circuit |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108666977A (en) |
| WO (1) | WO2020000862A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110417388A (en) * | 2019-08-02 | 2019-11-05 | 海宁昱能电子有限公司 | A kind of photovoltaic module switching off device and photovoltaic power generation safety system |
| WO2020000862A1 (en) * | 2018-06-29 | 2020-01-02 | 江苏集能易新能源技术有限公司 | Photovoltaic shutoff device series driving circuit |
| CN114050811A (en) * | 2022-01-13 | 2022-02-15 | 杭州禾迈电力电子股份有限公司 | Multi-input shutoff device, control method and photovoltaic power generation system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210469257U (en) * | 2019-12-03 | 2020-05-05 | 浙江佳明天和缘光伏科技有限公司 | Quick turn-off device capable of driving two series MOS (metal oxide semiconductor) tubes through single-path signal |
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- 2018-06-29 CN CN201810697610.XA patent/CN108666977A/en active Pending
- 2018-11-12 WO PCT/CN2018/115017 patent/WO2020000862A1/en active Application Filing
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| CN101232200A (en) * | 2007-01-24 | 2008-07-30 | 中国科学院自动化研究所 | Substance safe type uninterruptible DC voltage stabilizing power source for explosive gas atmosphere |
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| WO2020000862A1 (en) * | 2018-06-29 | 2020-01-02 | 江苏集能易新能源技术有限公司 | Photovoltaic shutoff device series driving circuit |
| CN110417388A (en) * | 2019-08-02 | 2019-11-05 | 海宁昱能电子有限公司 | A kind of photovoltaic module switching off device and photovoltaic power generation safety system |
| CN114050811A (en) * | 2022-01-13 | 2022-02-15 | 杭州禾迈电力电子股份有限公司 | Multi-input shutoff device, control method and photovoltaic power generation system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020000862A1 (en) | 2020-01-02 |
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