CN108886339A - Photovoltaic module array cutoff device - Google Patents
Photovoltaic module array cutoff device Download PDFInfo
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- CN108886339A CN108886339A CN201880000843.8A CN201880000843A CN108886339A CN 108886339 A CN108886339 A CN 108886339A CN 201880000843 A CN201880000843 A CN 201880000843A CN 108886339 A CN108886339 A CN 108886339A
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- 238000009434 installation Methods 0.000 claims abstract description 19
- 230000009471 action Effects 0.000 claims abstract description 14
- 239000003990 capacitor Substances 0.000 claims description 15
- 238000005070 sampling Methods 0.000 claims description 13
- 238000003466 welding Methods 0.000 claims description 12
- 230000000087 stabilizing effect Effects 0.000 claims description 9
- 230000008878 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 230000005669 field effect Effects 0.000 claims description 8
- 239000004065 semiconductor Substances 0.000 claims description 8
- 230000000295 complement effect Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 238000004146 energy storage Methods 0.000 claims description 4
- 230000005622 photoelectricity Effects 0.000 claims 1
- 210000004027 cell Anatomy 0.000 description 18
- 210000003850 cellular structure Anatomy 0.000 description 5
- 230000005611 electricity Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/30—Electrical components
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/30—Electrical components
- H02S40/34—Electrical components comprising specially adapted electrical connection means to be structurally associated with the PV module, e.g. junction boxes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/02016—Circuit arrangements of general character for the devices
- H01L31/02019—Circuit arrangements of general character for the devices for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/02021—Circuit arrangements of general character for the devices for devices characterised by at least one potential jump barrier or surface barrier for solar cells
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- 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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
-
- 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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
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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
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention discloses a kind of photovoltaic module array cutoff devices,For being connected to or disconnecting to photovoltaic module under the control of shutdown controller,Including box body,Box body has installation cavity,Lid is provided on installation cavity,Control circuit board is provided in installation cavity,The first connecting pin being electrically connected respectively with control circuit board and second connection end are provided on box body,It connects with shutdown controller the first connecting pin,Second connection end is connected with adjacent photovoltaic component,Wherein,Control circuit board includes interconnection main control unit,Controlled cell,Power supply unit,Interconnection box unit,Interconnection main control unit is connected with the first connecting pin,Interconnection main control unit generates a master signal under the action of turning off controller,Power supply unit is connected to controlled cell,Controlled cell generates a controlled signal under the action of master signal,Interconnection switches unit is connected with second connection end,Interconnection switches unit is connected to or disconnects under the action of controlled signal.By adopting the above-described technical solution, the fast and safely shutdown of each component in system can be realized automatically in the present invention, to guarantee personnel safety.
Description
Technical field
The present invention relates to a kind of photovoltaic module array turning off system.
Background technique
Photovoltaic cell is the device that solar radiation energy is directly changed into electric energy, and photovoltaic module is exactly by multiple photovoltaics
Product made of battery connection and encapsulation, is the basic unit of battery array in photovoltaic generating system.When photovoltaic module array goes out
When existing failure, need to turn off power grid, however photovoltaic module is electricity generation system, each series connection basic unit has high voltage,
To maintenance personal, there are security risks, it is therefore desirable to provide a kind of turning off system of fast intelligent, system can be realized automatically
In each component fast and safely shutdown, to guarantee personnel safety.
Summary of the invention
To overcome disadvantages mentioned above, the quick of each component in system can be realized automatically it is an object of that present invention to provide a kind of
The photovoltaic module array cutoff device of safe shutdown.
In order to reach the goals above, the present invention provides a kind of photovoltaic module array cutoff devices, for controlling in shutdown
Photovoltaic module is connected to or is disconnected under the control of device, including box body, the box body has installation cavity, sets on the installation cavity
It is equipped with lid, control circuit board is provided in the installation cavity, is provided on the box body electric with the control respectively
First connecting pin of road plate electrical connection and second connection end, first connecting pin are connected with controller is turned off, and described the
It connects with adjacent photovoltaic component two connecting pins, wherein the control circuit board includes interconnection main control unit, controlled cell, electricity
Source unit, interconnection box unit, the interconnection main control unit are connected with first connecting pin, the interconnection master control list
Member generates a master signal under the action of turning off controller, and the power supply unit is connected to the controlled cell, described
Controlled cell a controlled signal is generated under the action of master signal, the interconnection switches unit is connect with described second
End is connected, and the interconnection switches unit is connected to or disconnects under the action of the controlled signal.
Preferably, first connecting pin and second connection end are fixed on the box body, alternatively, described
First connecting pin and second connection end are arranged on the box body by extension line.
Preferably, support body is provided in the installation cavity, the control circuit board is mounted on the support body
Upper surface, the lower surface of the support body is provided with high pressure sleeve and low pressure sleeve, and one end of the low pressure sleeve is deep
The first connecting pin, the other end described in entering pass through support body and the corresponding contact of the lower surface of control circuit board connects, described
The second connection end is goed deep into one end of high pressure sleeve, the other end passes through support body and is connected with conductive sheet, the conductive sheet
It is connected with the corresponding contact of the lower surface of control circuit board.
Preferably, there is the conductive sheet the first joint face, extended segment and connection needle, the high pressure sleeve to have
Second joint face, first joint face, the second joint face are adjacent to and are fixedly connected by electric resistance welding.
Preferably, first connecting pin is located at the inside of second connection end.
It preferably, further include hook, the inner end of the hook is connected with support body, the outer end of the hook and light
Lie prostrate component connection.
Preferably, first connecting pin, second connection end extension line be threaded through in box body, the extension line is logical
The line card buckle crossed in installation cavity is fixed, and the lower section of the control circuit board has welding hole, passes through the welding
The extension thread end of first connecting pin, second connection end is soldered to the correspondence contact of the lower surface of control circuit board by hole
Afterwards, seal cap is installed on the welding hole.
Preferably, the both ends of the control circuit board have fixed-wing, and the fixed-wing correspondence is inserted in line card.
Preferably, control connection is realized by photoelectric coupling switch between the interconnection main control unit and controlled cell,
The photoelectric coupling switch includes a light emitting diode D and one by light-operated phototriode T；
The interconnection box unit includes a metal-oxide-semiconductor field effect transistor, and the grid of metal-oxide-semiconductor field effect transistor is connected to the controlled list
Member；
The controlled cell includes：
It is connected to the phototriode T and resistance R1 of power supply unit, resistance R1 is connected to the collector of phototriode T；
It is connected to the complementary push-pull circuit of power supply unit, the complementary push-pull circuit includes triode T2, resistance R3, triode
T3 and resistance R4, the triode T2, one of triode T3 be NPN type triode, the other is PNP type triode, institute
The base stage of the triode T2, triode T3 that state are connected, and collector is in parallel, and emitter is connected in parallel in the grid of metal-oxide-semiconductor field effect transistor
With output-controlled signal, resistance R3 is connected to the emitter of triode T2, and resistance R4 is connected to the emitter of triode T3；
The triode T1 and resistance R2, the base stage of the triode T1 for being connected to power supply unit are connected to phototriode T's
The collector of collector, the triode T1 is connected to the base stage of triode T2, triode T3.
Preferably, the power supply unit includes taking electric input unit, DC/DC converter, pressure stabilizing output unit, described
Electric input unit is taken to be connected to the output end of photovoltaic module, the pressure stabilizing output unit is connected to the controlled cell,
In,
The DC/DC converter has the end VIN, the end EN, the end SW, the end FB, the end CB, the end GND, and described takes electric input unit packet
Include counnter attack diode D1, filter capacitor C2, the filter capacitor C3 for being connected to the end VIN, the end EN；
The pressure stabilizing output unit includes the energy storage inductor L1, sampling resistor R11, sampling resistor R12, afterflow for being connected to the end SW
Diode D2, filter capacitor C4, the end filter capacitor C5, FB are connected between sampling resistor R1 and sampling resistor R2, the end CB and SW
Partially installing capacitor C1 is connected between end.
By adopting the above-described technical solution, the fast and safely pass of each component in system can be realized automatically in the present invention
It is disconnected, to guarantee personnel safety.
Detailed description of the invention
Attached drawing 1 is the perspective view one of the embodiment one of the power supply unit of photovoltaic module array cutoff device of the invention；
Attached drawing 2 is the perspective view two of the embodiment one of the power supply unit of photovoltaic module array cutoff device of the invention；
Attached drawing 3 is the side view of the embodiment one of the power supply unit of photovoltaic module array cutoff device of the invention；
Attached drawing 4 is the broken away view of the embodiment one of the power supply unit of photovoltaic module array cutoff device of the invention；
Attached drawing 5 is the perspective view of the embodiment two of the power supply unit of photovoltaic module array cutoff device of the invention；
Attached drawing 6 is the broken away view of the embodiment two of the power supply unit of photovoltaic module array cutoff device of the invention；
Attached drawing 7 is the system framework figure of the embodiment one of photovoltaic module array cutoff device of the invention；
Attached drawing 8 is the circuit diagram of photovoltaic module array cutoff device of the invention；
Attached drawing 9 is the circuit diagram of the power supply unit of photovoltaic module array cutoff device of the invention；
Attached drawing 10 is the system framework figure of the embodiment two of photovoltaic module array cutoff device of the invention.
Specific embodiment
The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawing, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.
Attached drawing 1 is the perspective view one of the embodiment one of the power supply unit of photovoltaic module array cutoff device of the invention, attached
Fig. 2 is the perspective view two of the embodiment one of the power supply unit of photovoltaic module array cutoff device of the invention, and attached drawing 3 is the present invention
Photovoltaic module array cutoff device power supply unit embodiment one side view, attached drawing 4 be photovoltaic module battle array of the invention
The broken away view of the embodiment one of the power supply unit of column cutoff device.Photovoltaic module array cutoff device in the present embodiment, including
Box body 1, box body 1 is built-in or is placed outside photovoltaic module, and box body 1 has installation cavity 2, is provided with lid 3, lid 3 on installation cavity 2
Edge is provided with sealing ring 16 to guarantee the waterproof performance of circuit.It is provided with control circuit board 4 in installation cavity 2, is arranged on box body 1
There are the first connecting pin 5 being electrically connected respectively with control circuit board 4 and second connection end 6, the first connecting pin 5 and shutdown controller string
Connection, second connection end 6 are connected with adjacent photovoltaic component.
The first connecting pin 5 and second connection end 6 in the present embodiment are fixedly disposed on box body 1, and first connects
Connect the inside that end 5 is located at second connection end 6.Support body 7 is provided in installation cavity 2, control circuit board 4 is mounted on support body 7
Upper surface, the lower surface of support body 7 are provided with high pressure sleeve 8 and low pressure sleeve 9, and the first connection is goed deep into one end of low pressure sleeve 9
End 5, the other end pass through support body 7 and connect with the corresponding contact of the lower surface of control circuit board 4, and one end of high pressure sleeve 8 is goed deep into
Second connection end 6, the other end pass through support body 7 and are connected with conductive sheet 10, pair of conductive sheet 10 and the lower surface of control circuit board 4
Contact is answered to connect.The outside of box body 1 is additionally provided with hook 15, and the inner end of hook 15 is connected fixed to play with support body 7
Effect, the outer end of hook 15 is connect with photovoltaic module.Conductive sheet 10 has the first joint face 11, extended segment 12 and connection needle
13, high pressure sleeve 8 has the second joint face 14, and the first joint face 11, the second joint face 14 are adjacent to and connect by the way that electric resistance welding is fixed
It connects, since the voltage of high pressure sleeve 8 is higher（1500V or more）, the excessively high generation of local temperature is dangerous in order to prevent, conductive sheet 10
Be relatively large in diameter, length is longer, surface area is larger, enhance the effect of heat dissipation.
Control circuit board includes interconnection main control unit, controlled cell, power supply unit, interconnection box unit, interconnects master control list
Member is connected with the first connecting pin, and interconnection main control unit generates a master signal under the action of turning off controller, and power supply unit connects
It is connected to controlled cell, controlled cell generates a controlled signal under the action of master signal, and interconnection switches unit is connect with second
End is connected, and interconnection switches unit is connected to or disconnects under the action of controlled signal.
Attached drawing 5 is the perspective view of the embodiment two of the power supply unit of photovoltaic module array cutoff device of the invention, attached drawing
6 be the broken away view of the embodiment two of the power supply unit of photovoltaic module array cutoff device of the invention.In the present embodiment, first connects
It connects end 5 and second connection end 6 to be arranged on box body 1 by extension line 21, the first connecting pin 5 is located at the lower section two of box body 1 in figure
End, second connection end 6 are located at the top both ends of box body 1, the first connecting pin 5, second connection end 6 extension line 21 be threaded through box body
In 1, extension line 21 is buckled by the line card 17 being located in installation cavity 2 and is fixed, and the lower section of control circuit board 4 has welding hole 19,
Can be fixed by control circuit board 4 by corresponding be inserted on line card 17 of the fixed-wing 18 at the both ends of control circuit board 4 when installation, with
21 end of extension line of first connecting pin 5, second connection end 6 is soldered to by welding hole 19 lower surface of control circuit board afterwards
Correspondence contact, seal cap 20 is installed on welding hole 19.
Attached drawing 7 is the system framework figure of the embodiment one of photovoltaic module array cutoff device of the invention, is used for light
Volt assembly array carries out shutdown control, including shutdown controller and a plurality of independent cutoff devices, and cutoff device has first
Connecting pin and second connection end, cutoff device are series between DC bus by second connection end and photovoltaic module, positive and negative end
It is DC bus, is connected to inverter, for each cutoff device between adjacent photovoltaic component, cutoff device passes through the first connection
End is connected with shutdown controller formation, and turning off system is the device for being turned off photovoltaic cell component string by turning off controller, is closed
Disconnected controller is the circuit for controlling cutoff device on-off, is operated as needed to shutdown controller, turns off controller pre-
If all cutoff devices under the conditions of in control circuit are switched on or off simultaneously to control the connection of photovoltaic module circuit or disconnection.
Cutoff device includes interconnection main control unit, controlled cell, power supply unit, interconnection box unit, interconnects main control unit
With second connection end, interconnects main control unit and generate a master signal under the action of turning off controller, power supply unit is connected to
Controlled cell, controlled cell generate a controlled signal under the action of master signal, and interconnection switches unit has the first connecting pin,
Interconnection switches unit is connected to or disconnects under the action of controlled signal.When needing to connect photovoltaic cell component string, shutdown is controlled
Device processed carries out logical operation, the conducting of interconnection box unit, and photovoltaic cell component string is all connected to, and direct current energy passes to inverter, into
Row power generation.When needing to turn off photovoltaic cell component string, shutdown operation is carried out to shutdown controller, is turned off at interconnection box unit
State, photovoltaic cell component string is all off, and DC bus both end voltage drops to zero, to realize safe shutdown.
Attached drawing 8 is the circuit diagram of photovoltaic module array cutoff device of the invention.The previous photovoltaic module of Z1 connection, Z2 connection
Latter photovoltaic module.It interconnects and control connection, photoelectric coupling is realized by photoelectric coupling switch between main control unit and controlled cell
Switch includes that a light emitting diode D and one by light-operated phototriode T, D and T is formed photoelectric coupling, to transmit signal and
Isolation even if the amplitude of interference voltage is larger, but is fed back defeated to photoelectrical coupler due to the input impedance very little of photoelectrical coupler
The noise voltage meeting very little for entering end, can be only formed very faint electric current, to be suppressed.The input circuit of photoelectrical coupler
There is no electrical link between output loop, also without altogether, between distribution capacity it is smaller, and insulation resistance is very greatly, because
The various jamming incoherent signals on this circuit one side are all difficult to be transferred to another side by photoelectrical coupler, avoid the dry of common-impedance coupling
Disturb the generation of signal.In addition, photoelectrical coupler can be very good to play the role of safety guarantee, even if when event occurs in external equipment
When barrier or even input signal are shorted, component will not be damaged, because can between the input circuit and output loop of photoelectrical coupler
To bear several kilovolts of high pressure.Finally, the response speed of photoelectrical coupler is exceedingly fast, responds delay time and there was only 10 μ s or so,
It is suitble in the present invention to the response very high occasion of rate request.
The previous interconnection box unit of K1 connection, the latter interconnection box unit of K2 connection, interconnection box unit include a MOS
The grid of effect pipe, metal-oxide-semiconductor field effect transistor is connected to controlled cell.
V is voltage source, is powered for controlled cell, and structural principle describes in detail later.Controlled cell includes：Even
It is connected to the phototriode T and resistance R1 of power supply unit, resistance R1 is connected to the collector of phototriode T；It is connected to power supply
The complementary push-pull circuit of unit, complementary push-pull circuit include triode T2, resistance R3, triode T3 and resistance R4, triode T2,
One of triode T3 is NPN type triode, the other is PNP type triode, triode T2, triode T3 base stage be connected,
Collector is in parallel, and emitter is connected in parallel in the grid of metal-oxide-semiconductor field effect transistor with output-controlled signal, and resistance R3 is connected to triode
The emitter of T2, resistance R4 are connected to the emitter of triode T3；It is connected to the triode T1 and resistance R2 of power supply unit, three poles
The base stage of pipe T1 is connected to the collector of phototriode T, and the collector of triode T1 is connected to triode T2, triode T3
Base stage.
" complementation " be by using the triode of two kinds of opposed polarities, using opposed polarity triode input polarity not
Together, the triode of two opposed polarities is motivated with a signal, one is NPN type triode, the other is three pole of positive-negative-positive
The base stage of pipe, two triodes is connected, and adds an input signal to make driving signal in the base stage of two pipes.Two pipe base stages and emitter
Parallel connection, since the polarity of two triodes is different, applied signal voltage in base stage is forward bias for one for two pipes, one
A is reverse bias.When an input signal is present, voltage increases two pipe base stages simultaneously, and applied signal voltage is to a pipe plus just at this time
To bias voltage, so the pipe enters conducting and magnifying state.Since base voltage increases, plus reversed inclined for another pipe
Voltage is set, so the pipe is in off state.When there is no input signal, two pipe base stages voltage decline simultaneously, it is positive to another pipe
Biasing makes the pipe enter conducting and magnifying state, and a pipe enters off state.
Of the invention rapidly switches off circuit operation principle：When needing photovoltaic system to be connected to work, control signal is flowed by K1
It shines to K2, D, T conducting, T1 cut-off, the lower end R2 high level, T3, which is connected, in T2 ends, the grid high level of T4, T4 conducting, photovoltaic
System is connected.When needing photovoltaic system quickly to disconnect, the signal between K1K2 is cut off, D does not shine, T cut-off, T1 saturation, R2
Lower end is low level, and T2 ends T3 conducting, and the grid of T4 is low level, T4 cut-off, photovoltaic system disconnection.
Attached drawing 9 is the circuit diagram of the power supply unit of photovoltaic module array cutoff device of the invention, and power supply unit includes taking
Electric input unit, DC/DC converter, pressure stabilizing output unit, take electric input unit to be connected to the output end of photovoltaic module, and pressure stabilizing is defeated
Unit is connected to controlled cell out, and DC/DC converter therein uses DC/DC chip, and DC/DC chip is a current-mode
Buck converter, it has very wide input voltage range 4.5V ~ 52V, is suitable for various applications, adjusts unstable electricity
Source to fixed stablizes output.The switching of built-in 0.9 Ω of low resistance switchs, so that the IC possesses 85% works fine effect
Rate, in addition the advantages of being effectively reduced chip surface temperature.
DC/DC chip has the end VIN, the end EN, the end SW, the end FB, the end CB, the end GND, and VIN, GND are the input terminals of this power supply,
Electricity is taken from photovoltaic module.Taking electric input unit includes being connected to the end VIN, the counnter attack diode D1 at the end EN, filter capacitor C2, filter
Wave capacitor C3.V, GND is the output end of this power supply, rapidly switches off circuit power supply for photovoltaic.Pressure stabilizing output unit includes being connected to
Energy storage inductor L1, sampling resistor R11, sampling resistor R12, sustained diode 2, filter capacitor C4, the filter capacitor C5 at the end SW,
The end FB is connected between sampling resistor R1 and sampling resistor R2, and partially installing capacitor C1 is connected between the end CB and the end SW.
This circuit takes electricity by VIN, GND from photovoltaic module, prevent by D1 it is reversed, by C2, C3 filter decoupling, made by U1
DC/DC transformation, through L1 energy storage D2 afterflow, C4, C5 filtering, by R1, R2 sampling feedback to U1, to obtain required for subsequent conditioning circuit
Burning voltage.
Attached drawing 10 is the system framework figure of the embodiment two of photovoltaic module array cutoff device of the invention, in the present embodiment
Photovoltaic component terminal box cutoff device it is similar in embodiment one, distinguish be in this implementations cutoff device one-to-one correspondence
Setting inside photovoltaic module, integrate specifically, can also be with photovoltaic component terminal box, connect as photovoltaic module
The separate unit of wire box exists, thus it is simpler using installing, therefore each component in system can be realized automatically in the present invention
Fast and safely shutdown, to guarantee personnel safety.
The technical concepts and features of embodiment of above only to illustrate the invention, its object is to allow be familiar with technique
People understands the contents of the present invention and is implemented, and it is not intended to limit the scope of the present invention, all spiritual according to the present invention
The equivalent change or modification that essence is done, should be covered by the scope of protection of the present invention.
Claims (10)
1. a kind of photovoltaic module array cutoff device, for being connected to or disconnecting to photovoltaic module under the control of shutdown controller,
It is characterized in that：Including box body, the box body has installation cavity, is provided with lid, the installation on the installation cavity
It is intracavitary to be provided with control circuit board, it is provided on the box body and is connect respectively with the first of the control circuit board electrical connection
End and second connection end, first connecting pin are connected with shutdown controller, the second connection end and adjacent photovoltaic group
Part series connection, wherein the control circuit board includes interconnection main control unit, controlled cell, power supply unit, interconnection box unit,
The interconnection main control unit is connected with first connecting pin, effect of the interconnection main control unit in shutdown controller
One master signal of lower generation, the power supply unit are connected to the controlled cell, and the controlled cell is in master signal
Under the action of generate a controlled signal, the interconnection switches unit is connected with the second connection end, and the interconnection is opened
Unit is closed to be connected to or disconnect under the action of the controlled signal.
2. photovoltaic module array cutoff device according to claim 1, it is characterised in that：First connecting pin and
Two connecting pins are fixed on the box body, alternatively, first connecting pin and second connection end are set by extension line
It sets on the box body.
3. photovoltaic module array cutoff device according to claim 1, it is characterised in that：It is provided in the installation cavity
Support body, the control circuit board are mounted on the upper surface of the support body, and the lower surface of the support body is provided with
High pressure sleeve and low pressure sleeve, first connecting pin is goed deep into one end of the low pressure sleeve, the other end passes through support body
It is connected with the corresponding contact of the lower surface of control circuit board, the deep second connection end in one end of the high pressure sleeve,
The other end passes through support body and is connected with conductive sheet, and the conductive sheet is connected with the corresponding contact of the lower surface of control circuit board.
4. photovoltaic module array cutoff device according to claim 3, it is characterised in that：The conductive sheet has first
Joint face, extended segment and connection needle, the high pressure sleeve have the second joint face, and first joint face, second connect
Junction is adjacent to and is fixedly connected by electric resistance welding.
5. photovoltaic module array cutoff device according to claim 1, it is characterised in that：First connecting pin is located at
The inside of second connection end.
6. photovoltaic module array cutoff device according to claim 1, it is characterised in that：It further include hook, the card
The inner end of hook is connected with support body, and the outer end of the hook is connect with photovoltaic module.
7. photovoltaic module array cutoff device according to claim 6, it is characterised in that：First connecting pin,
The extension line of two connecting pins is threaded through in box body, and the extension line is buckled by the line card being located in installation cavity and fixed, described
The lower section of control circuit board there is welding hole, by the welding hole by first connecting pin, second connection end
Behind the correspondence contact for extending the lower surface that thread end is soldered to control circuit board, seal cap is installed on the welding hole.
8. photovoltaic module array cutoff device according to claim 7, it is characterised in that：The two of the control circuit board
End has fixed-wing, and the fixed-wing correspondence is inserted in line card.
9. photovoltaic module array cutoff device according to claim 1, it is characterised in that：
Control connection, the photoelectricity coupling are realized by photoelectric coupling switch between the interconnection main control unit and controlled cell
Combination switch includes a light emitting diode D and one by light-operated phototriode T；
The interconnection box unit includes a metal-oxide-semiconductor field effect transistor, and the grid of metal-oxide-semiconductor field effect transistor is connected to the controlled list
Member；
The controlled cell includes：
It is connected to the phototriode T and resistance R1 of power supply unit, resistance R1 is connected to the collector of phototriode T；
It is connected to the complementary push-pull circuit of power supply unit, the complementary push-pull circuit includes triode T2, resistance R3, triode
T3 and resistance R4, the triode T2, one of triode T3 be NPN type triode, the other is PNP type triode, institute
The base stage of the triode T2, triode T3 that state are connected, and collector is in parallel, and emitter is connected in parallel in the grid of metal-oxide-semiconductor field effect transistor
With output-controlled signal, resistance R3 is connected to the emitter of triode T2, and resistance R4 is connected to the emitter of triode T3；
The triode T1 and resistance R2, the base stage of the triode T1 for being connected to power supply unit are connected to phototriode T's
The collector of collector, the triode T1 is connected to the base stage of triode T2, triode T3.
10. photovoltaic module array cutoff device according to claim 1, it is characterised in that：The power supply unit includes
Take electric input unit, DC/DC converter, pressure stabilizing output unit, the output for taking electric input unit to be connected to photovoltaic module
End, the pressure stabilizing output unit are connected to the controlled cell；Wherein,
The DC/DC converter has the end VIN, the end EN, the end SW, the end FB, the end CB, the end GND, and described takes electric input unit packet
Include counnter attack diode D1, filter capacitor C2, the filter capacitor C3 for being connected to the end VIN, the end EN；
The pressure stabilizing output unit includes the energy storage inductor L1, sampling resistor R11, sampling resistor R12, afterflow for being connected to the end SW
Diode D2, filter capacitor C4, the end filter capacitor C5, FB are connected between sampling resistor R1 and sampling resistor R2, the end CB and SW
Partially installing capacitor C1 is connected between end.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2018/082979 WO2019196096A1 (en) | 2018-04-13 | 2018-04-13 | Photovoltaic assembly array shutdown apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108886339A true CN108886339A (en) | 2018-11-23 |
Family
ID=64325081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880000843.8A Pending CN108886339A (en) | 2018-04-13 | 2018-04-13 | Photovoltaic module array cutoff device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108886339A (en) |
| WO (1) | WO2019196096A1 (en) |
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| Publication number | Publication date |
|---|---|
| WO2019196096A1 (en) | 2019-10-17 |
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Application publication date: 20181123 |