CN205811955U - Direct current conflux case in photovoltaic generating system - Google Patents
Direct current conflux case in photovoltaic generating system Download PDFInfo
- Publication number
- CN205811955U CN205811955U CN201620517475.2U CN201620517475U CN205811955U CN 205811955 U CN205811955 U CN 205811955U CN 201620517475 U CN201620517475 U CN 201620517475U CN 205811955 U CN205811955 U CN 205811955U
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- China
- Prior art keywords
- direct current
- conflux case
- negative
- branch road
- current conflux
- Prior art date
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
This utility model provides the direct current conflux case in a kind of photovoltaic generating system, and including direct current conflux case casing, described direct current conflux case casing internally installed has PLC, just confluxes busbar, negative conflux busbar and n direct current input circuit；Each direct current input circuit all includes 1 positive pole branch road being arranged in pairs and 1 negative pole branch road；Each described positive pole branch road is provided with Hall element, and each described negative pole branch road is provided with chopper；The inside of direct current conflux case casing is also equipped with temperature sensor and Smoke Sensor.Advantage is: (1) is remarkably improved the functional reliability of direct current conflux case, reduces the fault rate of direct current conflux case；(2) direct current conflux case directly uses photovoltaic module as input power, uses electric lines of force as communications carrier, it is not necessary to carry out communication line wiring again, can be substantially reduced photovoltaic plant and electrically invest.
Description
Technical field
This utility model belongs to technical field of photovoltaic power generation, is specifically related to the direct current in a kind of photovoltaic generating system
Header box.
Background technology
In solar photovoltaic generation system, in order to reduce between solar-energy photo-voltaic cell array and inverter
Line, it usually needs install direct current conflux case.The occupation mode of direct current conflux case is: by some, rule
The photovoltaic cell series connection that lattice are identical is got up, and forms photovoltaic tandem one by one, the most again by several photovoltaic tandems
Access direct current conflux case in parallel, after confluxing, is connected to the input of photovoltaic DC-to-AC converter in direct current conflux case,
The outfan connection transformer of photovoltaic DC-to-AC converter boosts to electrical network, it is achieved photovoltaic generation grid-connected.
For current direct current conflux case, for preventing direct current conflux case from direct current phenomenon of arc discharge occurring, generally often
Primary Ioops installs additional counnter attack diode.But, owing to direct current conflux case works in high temperature, high humidity environment,
Again due to reasons such as counnter attack diode product quality, make direct current conflux case have higher fault rate, increase the weight of
The workload of operation maintenance personnel.It addition, for making direct current conflux case have monitoring communication function, direct current conflux case
Being built-in with data transmission device, data transmission device is by the communications cable and host computer communication, it is seen then that power station
During construction, need additionally to arrange the communications cable, add photovoltaic plant investment.
Utility model content
The defect existed for prior art, this utility model provides the direct current in a kind of photovoltaic generating system to converge
Stream case, can effectively solve the problems referred to above.
The technical solution adopted in the utility model is as follows:
This utility model provides the direct current conflux case in a kind of photovoltaic generating system, including direct current conflux case casing,
Described direct current conflux case casing internally installed has PLC, just confluxes busbar, negative conflux busbar and n
Direct current input circuit；N is natural number；
Wherein, each direct current input circuit all includes 1 positive pole branch road being arranged in pairs and 1 negative pole branch road；
Each described positive pole branch road is provided with Hall element, and each described negative pole branch road is provided with chopper；It addition,
The input of paired positive pole branch road and the input of negative pole branch road are connected respectively to the positive and negative of 1 photovoltaic string battle array
Outfan；The outfan of paired positive pole branch road and the outfan of negative pole branch road are connected respectively to described just conflux
The input of busbar and the input of the described negative busbar that confluxes；
The outfan of the described busbar that just confluxing and the outfan of the described negative busbar that confluxes are connected respectively to described PLC
The positive-negative input end of controller；
Described PLC is configured with positive direct-current outfan and negative DC output end, is respectively used to be passed by communication
Defeated unit is connected with the positive and negative terminal of host computer.
Preferably, the inside at described direct current conflux case casing is also equipped with temperature sensor and Smoke Sensor；
Described temperature sensor and described Smoke Sensor are connected respectively to described PLC.
Preferably, the outer wall at described direct current conflux case casing is also equipped with display screen；Described display screen connects
To described PLC.
Preferably, the inside at described direct current conflux case casing is also equipped with lightning protection device；Described lightning protection device includes
Anode interface, negative pole interface and earth lead；
Wherein, the described busbar that just confluxing is designated as the 1st connecting line to the connection line between described PLC
Road；Described anode interface electrically connects with described 1st connection line；
The described negative busbar that confluxes is designated as the 2nd connection line to the connection line between described PLC；Institute
State negative pole interface to electrically connect with described 2nd connection line.
Preferably, described communications unit includes: electric lines of force, modem, optical fiber and switch；
One end of described electric lines of force is connected with the positive and negative DC output end of described PLC；Described electric lines of force
The other end is connected with one end of described modem；The other end of described modem is connected by optical fiber
One end to switch；The other end of described switch is connected with host computer.
Preferably, described PLC includes bus and the microprocessor being connected respectively, defeated with described bus
Enter unit, output unit, expansion interface, memorizer and communication unit.
Direct current conflux case in the photovoltaic generating system that this utility model provides has the advantage that
(1) it is remarkably improved the functional reliability of direct current conflux case, reduces the fault rate of direct current conflux case；
(2) direct current conflux case directly uses photovoltaic module as input power, uses electric lines of force to carry as communication
Body, it is not necessary to carry out communication line wiring again, can be substantially reduced photovoltaic plant and electrically invest.
Accompanying drawing explanation
The structural representation of the direct current conflux case that Fig. 1 provides for this utility model；
Wherein, 1-PLC controller；2-Hall element；3-chopper；4-temperature sensor；5-smog passes
Sensor；6-display screen；7 lightning protection devices-；8-is just confluxing busbar；The negative busbar that confluxes of 9-；
The structural representation communicated between direct current conflux case and host computer that Fig. 2 provides for this utility model；
Wherein, 10-header box；11-electric lines of force；12-modem；13-optical fiber；14-switch；15-
Host computer；
The internal structure schematic diagram of the PLC that Fig. 3 provides for this utility model；
The operation principle schematic diagram of the direct current conflux case that Fig. 4 provides for this utility model.
Detailed description of the invention
In order to make this utility model be solved the technical problem that, technical scheme and beneficial effect clearer,
Below in conjunction with drawings and Examples, this utility model is further elaborated.Should be appreciated that herein
Described specific embodiment, only in order to explain this utility model, is not used to limit this utility model.
In conjunction with Fig. 1, this utility model provides the direct current conflux case in a kind of photovoltaic generating system, converges including direct current
Stream box body, direct current conflux case casing internally installed has PLC, just confluxes busbar, the negative busbar that confluxes
With n direct current input circuit；N is natural number；
Wherein, each direct current input circuit all includes 1 positive pole branch road being arranged in pairs and 1 negative pole branch road；
Each positive pole branch road is provided with Hall element, and each negative pole branch road is provided with chopper；It addition, it is paired
The input of positive pole branch road and the input of negative pole branch road are connected respectively to the positive-negative output end of 1 photovoltaic string battle array；
The outfan of paired positive pole branch road and the outfan of negative pole branch road are connected respectively to just to conflux the input of busbar
Input with the negative busbar that confluxes；
The outfan of busbar that just confluxing is connected respectively to the positive and negative of PLC with the outfan of the negative busbar that confluxes
Input；
PLC is configured with positive direct-current outfan and negative DC output end, is respectively used to by communications list
Unit is connected with the positive and negative terminal of host computer.
Visible, in this utility model, the positive pole branch road of each direct current input circuit is mounted on Hall element,
Its negative pole branch road is mounted on chopper, and therefore, Hall element the on-site signal gathered is transferred to PLC
Controller, PLC, by on-site signal analysis, can determine whether phenomenon of arc discharge to occur, when judging
During a certain direct current input circuit generation arcing, PLC can automatically control the breaker closing in this loop, carry
The high security reliability of direct current conflux case.Owing to need not use counnter attack diode, thus solve tradition skill
The problem that the direct current conflux case fault rate that caused by counnter attack diode in art is high.
On the basis of said structure, also can carry out following improvement:
(1) 1 is improved
It addition, be also equipped with temperature sensor and Smoke Sensor in the inside of direct current conflux case casing；Temperature
Sensor and Smoke Sensor are connected respectively to PLC.
Temperature sensor and Smoke Sensor are mainly used in supervising direct current conflux case box house ambient parameter
Survey, in the case of there is not arcing, too high or time smokescope is too high when monitoring temperature, can speculate and send out
Lighting a fire calamity, now, PLC disconnects main switch, and display screen sends fire warning, and reports to the police to host computer,
Thus improve direct current conflux case safety and reliability further.
(2) 2 are improved
Outer wall at direct current conflux case casing is also equipped with display screen；Display screen is connected to PLC.
(3) 3 are improved
It is also equipped with lightning protection device in the inside of direct current conflux case casing；Lightning protection device includes that anode interface, negative pole connect
Mouth and earth lead；
Wherein, the busbar that just confluxes is designated as the 1st connection line to the connection line between PLC；Positive pole
Interface and the electrical connection of the 1st connection line；
The negative busbar that confluxes is designated as the 2nd connection line to the connection line between PLC；Negative pole interface with
2nd connection line electrical connection.
(4) 4 are improved
With reference to Fig. 4, PLC include bus and the microprocessor being connected with bus respectively, input block,
Output unit, expansion interface, memorizer and communication unit.
Wherein, input block, for being connected with Hall element, is used for receiving on-site signal.Output unit is used
In driving breaker actuation.Expansion interface is for being connected with Smoke Sensor, temperature sensor and display screen.
Communication unit is for realizing communicating with host computer.
(5) 5 are improved
With reference to Fig. 2, communications unit includes: electric lines of force, modem, optical fiber and switch；Electric power
One end of line is connected with the positive and negative DC output end of PLC；The other end of electric lines of force and modem
One end connects；The other end of modem is connected to one end of switch by optical fiber；Another of switch
End is connected with host computer.
PLC include bus and the microprocessor being connected with bus respectively, input block, output unit,
Expansion interface, memorizer and communication unit.
Its operation principle is: in outdoor junction case, PLC utilizes modulation technique transmission data to be adjusted
System, then carries out being transferred to modem on electric lines of force；Modem modulates signals into out,
Being connected in the switch of Central Control Room by optical fiber afterwards, signal is uploaded to host computer by switch again.
Visible, direct current conflux case uses electric lines of force as communications carrier, it is not necessary to carry out communication line wiring again,
Photovoltaic plant can be substantially reduced electrically invest.
As a kind of specific implementation, with reference to Fig. 2, the operation principle of direct current conflux case can be:
Step 1, Hall element gathers the on-site signal of place direct current input circuit, and uploads to PLC control
Device；
Step 2, on-site signal is analyzed by PLC, it is judged that whether direct current conflux case breaks down,
If do not broken down, by returning step 1；If it occur that fault, then forward step 3 to；
Step 3, on-site signal is analyzed by PLC further, it is judged that whether this direct current input circuit
There is phenomenon of arc discharge, if it is, forward step 4 to；If it does not, further on-site signal is analyzed,
Judge whether overcurrent phenomenon to occur, if it is, forward step 4 to；If it is not, then obtain temperature further
The temperature value that sensor detects, and judge that temperature is the most too high, if it is, disconnect main switch, and turn
To step 5；If it is not, then obtain the smokescope value that Smoke Sensor detects further, and judge smog
Concentration value is the most too high, if it is, disconnect main switch, and forwards step 5 to；If it is not, then return step
1；
Step 4, PLC obtains the direct current input circuit broken down, and makes corresponding breaker actuation,
Disconnect the direct current input circuit broken down, then carry out local warning；Then go to step 5；
Step 5, PLC upwards machine drawing sends alarm, and operation maintenance personnel is fixed a breakdown；Then go to step 1.
In sum, the direct current conflux case in the photovoltaic generating system that this utility model provides, have following excellent
Point:
(1) whether direct current conflux case can occur direct current arcing existing by each branch road of automatic decision by Hall element
As, and can automatically the branch road that direct current arcing occurs be disconnected, owing to can be accurate to switch each branch road
Controlling, a certain branch road does not interferes with the normal work of other branch roads, the generating being effectively increased when breaking down
Efficiency, greatly alleviates operation maintenance personnel workload；
(2) carried out the early warning of fire by temperature sensor and Smoke Sensor double insurance, improve further
The security reliability of direct current conflux case；
(3) human-computer interaction interface of direct current conflux case display screen can facilitate operation maintenance personnel scene to check header box
Duty, facilitates operation maintenance personnel to safeguard direct current conflux case；
(4) direct current conflux case use photovoltaic module as input power, use electric lines of force as communications carrier,
Without carrying out communication line wiring again, photovoltaic plant can be substantially reduced and electrically invest.
The above is only preferred implementation of the present utility model, it is noted that for the art
For those of ordinary skill, on the premise of without departing from this utility model principle, it is also possible to make some improvement
And retouching, these improvements and modifications also should regard protection domain of the present utility model.
Claims (6)
1. the direct current conflux case in a photovoltaic generating system, it is characterised in that include direct current conflux case casing,
Described direct current conflux case casing internally installed has PLC, just confluxes busbar, negative conflux busbar and n
Direct current input circuit；N is natural number；
Wherein, each direct current input circuit all includes 1 positive pole branch road being arranged in pairs and 1 negative pole branch road；
Each described positive pole branch road is provided with Hall element, and each described negative pole branch road is provided with chopper；It addition,
The input of paired positive pole branch road and the input of negative pole branch road are connected respectively to the positive and negative of 1 photovoltaic string battle array
Outfan；The outfan of paired positive pole branch road and the outfan of negative pole branch road are connected respectively to described just conflux
The input of busbar and the input of the described negative busbar that confluxes；
The outfan of the described busbar that just confluxing and the outfan of the described negative busbar that confluxes are connected respectively to described PLC
The positive-negative input end of controller；
Described PLC is configured with positive direct-current outfan and negative DC output end, is respectively used to be passed by communication
Defeated unit is connected with the positive and negative terminal of host computer.
Direct current conflux case in photovoltaic generating system the most according to claim 1, it is characterised in that
The inside of described direct current conflux case casing is also equipped with temperature sensor and Smoke Sensor；Described temperature sensing
Device and described Smoke Sensor are connected respectively to described PLC.
Direct current conflux case in photovoltaic generating system the most according to claim 1, it is characterised in that
The outer wall of described direct current conflux case casing is also equipped with display screen；Described display screen is connected to described PLC and controls
Device.
Direct current conflux case in photovoltaic generating system the most according to claim 1, it is characterised in that
The inside of described direct current conflux case casing is also equipped with lightning protection device；Described lightning protection device includes anode interface, negative pole
Interface and earth lead；
Wherein, the described busbar that just confluxing is designated as the 1st connecting line to the connection line between described PLC
Road；Described anode interface electrically connects with described 1st connection line；
The described negative busbar that confluxes is designated as the 2nd connection line to the connection line between described PLC；Institute
State negative pole interface to electrically connect with described 2nd connection line.
Direct current conflux case in photovoltaic generating system the most according to claim 1, it is characterised in that institute
State communications unit to include: electric lines of force, modem, optical fiber and switch；
One end of described electric lines of force is connected with the positive and negative DC output end of described PLC；Described electric lines of force
The other end is connected with one end of described modem；The other end of described modem is connected by optical fiber
One end to switch；The other end of described switch is connected with host computer.
6., according to the direct current conflux case in the photovoltaic generating system described in any one of claim 1-5, its feature exists
In, described PLC include bus and the microprocessor being connected with described bus respectively, input block,
Output unit, expansion interface, memorizer and communication unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620517475.2U CN205811955U (en) | 2016-05-31 | 2016-05-31 | Direct current conflux case in photovoltaic generating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620517475.2U CN205811955U (en) | 2016-05-31 | 2016-05-31 | Direct current conflux case in photovoltaic generating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205811955U true CN205811955U (en) | 2016-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620517475.2U Expired - Fee Related CN205811955U (en) | 2016-05-31 | 2016-05-31 | Direct current conflux case in photovoltaic generating system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109672220A (en) * | 2019-02-25 | 2019-04-23 | 黑龙江大千环保科技有限公司 | A kind of at village level photovoltaic plant management system and its control method |
-
2016
- 2016-05-31 CN CN201620517475.2U patent/CN205811955U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109672220A (en) * | 2019-02-25 | 2019-04-23 | 黑龙江大千环保科技有限公司 | A kind of at village level photovoltaic plant management system and its control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161214 Termination date: 20180531 |