CN203984339U - Direct current threeway electric wire connecting junction in photovoltaic plant - Google Patents
Direct current threeway electric wire connecting junction in photovoltaic plant Download PDFInfo
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- CN203984339U CN203984339U CN201420376928.5U CN201420376928U CN203984339U CN 203984339 U CN203984339 U CN 203984339U CN 201420376928 U CN201420376928 U CN 201420376928U CN 203984339 U CN203984339 U CN 203984339U
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- string
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- inlet wire
- electric wire
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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
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Abstract
The utility model discloses the direct current threeway electric wire connecting junction in a kind of photovoltaic plant, comprise the outlet of confluxing, first group of string inlet wire and second group of string inlet wire, described first group of string inlet wire one end is connected with second group of string inlet wire one end, described in the outlet one end of confluxing connect the common port of first group of string inlet wire and second group of string inlet wire.After adopting direct current threeway electric wire connecting junction, two component string are converged rear as a pass to header box, reduced the use amount of component string to photovoltaic private cable between header box, take full advantage of the ampacity of private cable.The utility model is simple in structure, only need on existing mode of connection, change a little, but but saved to a great extent the economic input in connection line when reality is used, and has very high practical value.
Description
Technical field
This product belongs to photovoltaic application, is specifically related to the direct current threeway electric wire connecting junction in a kind of photovoltaic plant.
Background technology
The photovoltaic private cable that photovoltaic module in the market carries all adopts 4 squares of photovoltaic private cables, and ampacity can reach 40A, and the electric current of assembly is generally about 8A left and right, is far from reaching the current load amount of private cable.
The common method that in photovoltaic plant, component string connects is at present that a component string forms a loop, use a photovoltaic private cable that component string is connected to header box, with respect to the current load amount of photovoltaic private cable, apparent, the use of private cable has certain waste.
Summary of the invention
In order to overcome the above problems, the utility model provides the electric wire connecting junction of the direct current threeway in a kind of photovoltaic plant.
Technical scheme of the present invention is as follows:
Direct current threeway electric wire connecting junction in a kind of photovoltaic plant, comprise the outlet of confluxing, first group of string inlet wire and second group of string inlet wire, described first group of string inlet wire one end is connected with second group of string inlet wire one end, described in the outlet one end of confluxing connect the common port of first group of string inlet wire and second group of string inlet wire.
Useful technique effect of the present invention is:
After adopting direct current threeway electric wire connecting junction, two component string are converged rear as a pass to header box, reduced the use amount of component string to private cable between header box, and can prove by calculating, even two component string Bing Zhi, mono-tunnel is connected to header box, do not need to change the cross-section of cable yet, just can guarantee that the loss of voltage in circuit is within relevant criterion, take full advantage of like this ampacity of private cable, and can save on the original basis component string to 50% photovoltaic private cable use amount between header box.
The utility model is simple in structure, only need on existing mode of connection, change a little, but but greatly saved the economic input in connection line when reality is used, and has very high practical value.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model.
Fig. 2 is using method schematic diagram of the present utility model.
Fig. 3 is the schematic layout pattern of embodiment 1.
Fig. 4 is the schematic layout pattern of embodiment 2.
Embodiment
Fig. 1 is schematic diagram of the present utility model, direct current threeway electric wire connecting junction in photovoltaic plant comprises the outlet 1 of confluxing, group string inlet wire 2 and group string inlet wire 3, described group of string inlet wire 2 one end and group string inlet wire 3 one end are connected, described in conflux outlet 1 one end connection group string inlet wire 2 and organizing go here and there the common port of inlet wire 3.
Fig. 2 is using method schematic diagram of the present utility model, during use, two threeway electric wire connecting junctions use jointly as one group, the group string inlet wire 2 of one of them threeway electric wire connecting junction and group string inlet wire 3 are connected respectively two positive poles of two photovoltaic cell component strings, the group string inlet wire 2 of another threeway electric wire connecting junction and group string inlet wire 3 are connected respectively two negative poles of two photovoltaic cell component strings, between group string inlet wire 2 and group string inlet wire 3 and photovoltaic module string, all use 4 squares of photovoltaic private cables 7 that photovoltaic module carries to be connected.The outlet 1 of confluxing of two threeway electric wire connecting junctions converges two photovoltaic cell component strings rear as a pass to header box, and connecting line is used 4 squares of photovoltaic private cables 8.
If do not use threeway electric wire connecting junction, each component string needs an independent private cable that component string is connected to header box, and after having used threeway electric wire connecting junction, can first two component string be connected together, re-use a private cable, two component string are connected to header box together.A private cable connects two component string, and the electric current on private cable can be larger, under identical traffic distance, line voltage distribution loss on private cable increases, but known through calculating, such loss of voltage is completely within the scope of technical standard, and computational process is as follows:
According to the 3rd of 3.3.8 in standard < < photovoltaic and architecture-integral application technology rules > >, completely send out under state, line voltage distribution loss should be controlled in 3%, the inventor is using the photovoltaic module string array using in two reality as embodiment, done following computation sheet, take 22 block assemblies as a string, and the most economical rational 1MW square formation of take is example.
Embodiment 1:
As shown in Figure 3, inverter chamber is in the middle of all component string 6 for square formation layout.
In Fig. 3, component string 6 is connected to header box 5, and header box 5 is connected to inverter chamber 4, and line all needs to use 4 squares of photovoltaic private cables.In component string layout shown in Fig. 3, the A position apart from the header box 5 of inverter chamber 4 distal-most end in Fig. 3, the header box line loss of distal-most end, by maximum, is calculated so do circuit voltage loss with the header box 5 of this distal-most position.Way routinely, each component string 6 is single while using a private cable solely to cause header box 5, and loss of voltage result of calculation is as table 1:
The conventional way loss of voltage in table 1 embodiment 1
From data in table 1,1.40% is less than 3%, meets relevant criterion requirement.
If adopted after threeway electric wire connecting junction, do not change the cross-section of cable, because electric current on circuit is larger, under identical transmission range, the loss of voltage increases, and concrete outcome is as shown in table 2:
In table 2 embodiment 1, adopt the loss of voltage after threeway electric wire connecting junction
From data in table 2, to compare with table 1, component string to the loss of voltage between header box increases, and still 2.08% is less than 3%, meets relevant criterion requirement.Visible adopted threeway electric wire connecting junction after, although the loss of voltage increases in circuit, but still within relevant criterion requires, but use a private cable owing to each component string will being used the situation of a private cable changed every two component string into, component string nearly reduces 50% to the use length of the private cable between header box, has greatly saved correlative charges.
Embodiment 2:
As shown in Figure 4, in a lot of design of photovoltaic power stations, be all accustomed to inverter 4 to be placed on a side of vertical road, in this case, A position apart from the header box 5 of inverter chamber 4 distal-most end in Fig. 4, but with respect to layout shown in Fig. 3, the header box 5 of distal-most end is farther apart from the distance of inverter chamber 4, the loss of voltage in circuit is more, in this case, way, is not used threeway electric wire connecting junction routinely, each component string 6 causes separately header box 5, and loss of voltage result of calculation is as table 3:
The conventional way loss of voltage in table 3 embodiment 2
From data in table 3, compare with embodiment 1, now header box is longer to the circuit of inverter, and the loss of voltage increases, and still 2.14% is less than 3%, meets relevant criterion requirement.
If adopted after threeway electric wire connecting junction, do not change the cross-section of cable, because electric current on circuit is larger, under identical transmission range, the loss of voltage increases, and concrete outcome is as shown in table 4:
In table 4 embodiment 2, adopt the loss of voltage after threeway electric wire connecting junction
From data in table 4, adopt after threeway electric wire connecting junction, component string to the loss of voltage between header box increases, but 2.82% be still less than 3%, meets relevant criterion requirement.Visible adopted threeway electric wire connecting junction after, and at header box away from inverter in the situation that, although the loss of voltage increases in circuit, but still within relevant criterion requires, but use a private cable owing to each component string will being used the situation of a private cable changed every two component string into, component string nearly reduces 50% to the use length of the private cable between header box, has greatly saved correlative charges.
From above result, after adopting direct current threeway electric wire connecting junction, needn't change the cross-section of cable, although the loss of voltage in circuit increases to some extent, but as long as place rationally header box and inverter position, in circuit, must still can be controlled in 3% by the loss of voltage, can meet relevant criterion requirement.But component string has nearly reduced 50% to the use length of the private cable between header box, has greatly saved correlative charges, illustrates that the utility model has very high practical value.
Above-described is only the preferred embodiment of the present invention, the invention is not restricted to above embodiment.Be appreciated that the oher improvements and changes that those skilled in the art directly derive or associate without departing from the spirit and concept in the present invention, within all should thinking and being included in protection scope of the present invention.
Claims (1)
1. the direct current threeway electric wire connecting junction in a photovoltaic plant, it is characterized in that: comprise the outlet of confluxing (1), first group of string inlet wire (2) and second group of string inlet wire (3), described first group of string inlet wire (2) one end is connected with second group of string inlet wire (3) one end, described in outlet (1) one end of confluxing connect the common port of first group of string inlet wire (2) and second group of string inlet wire (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420376928.5U CN203984339U (en) | 2014-07-08 | 2014-07-08 | Direct current threeway electric wire connecting junction in photovoltaic plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420376928.5U CN203984339U (en) | 2014-07-08 | 2014-07-08 | Direct current threeway electric wire connecting junction in photovoltaic plant |
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| Publication Number | Publication Date |
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| CN203984339U true CN203984339U (en) | 2014-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420376928.5U Expired - Fee Related CN203984339U (en) | 2014-07-08 | 2014-07-08 | Direct current threeway electric wire connecting junction in photovoltaic plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109831157A (en) * | 2019-03-29 | 2019-05-31 | 江苏中信博新能源科技股份有限公司 | A kind of system and method for simplified photovoltaic group string remittance line |
-
2014
- 2014-07-08 CN CN201420376928.5U patent/CN203984339U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109831157A (en) * | 2019-03-29 | 2019-05-31 | 江苏中信博新能源科技股份有限公司 | A kind of system and method for simplified photovoltaic group string remittance line |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160804 Address after: Chenghua District Shuanglin road Chengdu City, Sichuan province 610000 No. 251 Patentee after: The IT Electronics Eleventh Design & Research Institute Scientific and Technological Engineering Corporation Limited Address before: 214000 building A2, No. 777 West Construction Road, Jiangsu, Wuxi Patentee before: THE IT ELECTRONICS ELEVENTH DESIGN & RESEARCH INSTITUTE SCIENTIFIC AND TECHNOLOGICAL ENGINEERING CORPORATION LIMITED EAST CHINA BRANCH (WUXI) |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141203 Termination date: 20210708 |
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| CF01 | Termination of patent right due to non-payment of annual fee |