CN204231288U - A kind of distributed photovoltaic convergence system - Google Patents
A kind of distributed photovoltaic convergence system Download PDFInfo
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- CN204231288U CN204231288U CN201420689944.XU CN201420689944U CN204231288U CN 204231288 U CN204231288 U CN 204231288U CN 201420689944 U CN201420689944 U CN 201420689944U CN 204231288 U CN204231288 U CN 204231288U
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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
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- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The utility model discloses a kind of distributed photovoltaic convergence system, comprises solar module string, 2 remittance 1 header box A, 6 converge 1 header box B and 7 remittance, 1 header box C.Described solar module string is set to 16 strings, is respectively component string 1, component string 2, component string 3, component string 4, component string 5, component string 6, component string 7, component string 8, component string 9, component string 10, component string 11, component string 12, component string 13, component string 14, component string 15, component string 16.Described 2 remittance 1 header box A are set to four, be respectively 2 remittance 1 header box A1,2 remittance 1 header box A2,2 converge 1 header box A3,2 remittance 1 header box A4.The utility model overcomes the high shortcoming of conventional photovoltaic convergence system cable loss, by increasing the progression that confluxes, increasing photovoltaic cable conductor cross-section minimizing cable resistance and pressure drop, reduces system loss, improves systems generate electricity amount.
Description
Technical field
The utility model relates to a kind of photovoltaic conflux system, particularly relates to a kind of distributed photovoltaic convergence system.
Background technology
The world today, the fossil energy such as coal, oil is day by day exhausted, and solar energy is unlimited as a kind of reserves, can clean utilization, most potentiality regenerative resource, more and more favored.Greatly develop photovoltaic industry, active development solar energy, become the important component part of various countries' strategy of sustainable development.At present, domestic photovoltaic plant is to use centralized combining inverter, need first for solar module multi-disc series connection, access header box in parallel, each header box is access DC cabinet in parallel again, by DC cabinet access grid-connected inverter in parallel, to guarantee MPPT maximum power point tracking (MPPT) scope and the rated input power that reach combining inverter.Because monolithic solar cell component power is lower, the series connection of multi-disc solar module need be formed solar module string, more in parallelly with other component string access header box.Conventional access way is by each component string parallel connection access header box with 4 square millimeters of (only as example, being not limited to this) photovoltaic cables.But, every road solar module string uses 4 square millimeters of photovoltaic cables to guide to header box, apart from distant, from battery strings to header box, distance can reach 200-400 rice, but, owing to using same O. cable, when the distance of solstics component string and header box reaches 70 meters, the loss that cable resistance produces and the pressure drop that resistance produces will reduce the generated output of other component string, and loss about will account for 0.8% of photovoltaic generating system total losses.
Utility model content
The purpose of this utility model is, by a kind of distributed photovoltaic convergence system, to solve the problem that above background technology part is mentioned.
For reaching this object, the utility model by the following technical solutions:
A kind of distributed photovoltaic convergence system, it comprises solar module string, 2 remittance 1 header box A, 6 converge 1 header box B and 7 remittance, 1 header box C; Described solar module string is set to 16 strings, be respectively component string 1, component string 2, component string 3, component string 4, component string 5, component string 6, component string 7, component string 8, component string 9, component string 10, component string 11, component string 12, component string 13, component string 14, component string 15, component string 16, described 2 remittance 1 header box A are set to four, be respectively 2 remittance 1 header box A1,2 remittance 1 header box A2,2 converge 1 header box A3,2 remittance 1 header box A4;
The outlet of described component string 1 and component string 2, component string 7 and component string 8, component string 9 and component string 10, component string 15 and component string 16 by photovoltaic cable respectively corresponding access in parallel 2 converge 1 header box A1,2 and converge 1 header box A2,2 and converge 1 header box A3,2 and converge 1 header box A4; Photovoltaic cable parallel connection access 6 remittance 1 header box B are passed through in described component string 3, component string 4, component string 5, component string 6,2 remittance 1 header box A1,2 outlets converging 1 header box A2; The outlet of described 6 remittance 1 header box B, 2 remittance 1 header box A3,2 remittance 1 header box A4, component string 11, component string 12, component string 13, component string 14 accesses 7 remittance 1 header box C by photovoltaic cable parallel connection.
Especially, the outlet of described component string 1 and component string 2, component string 7 and component string 8, component string 9 and component string 10, component string 15 and component string 16 is PV1-F 1*4mm by specification
2photovoltaic cable respectively corresponding access in parallel 2 converge 1 header box A1,2 and converge 1 header box A2,2 and converge 1 header box A3,2 and converge 1 header box A4; The outlet of described component string 3, component string 4, component string 5, component string 6 is PV1-F1*4mm by specification
2photovoltaic cable parallel connection access 6 converge 1 header box B; Described 2 remittance 1 header box A1,2 outlets converging 1 header box A2 are PV1-F 1*10mm by specification
2photovoltaic cable parallel connection access 6 converge 1 header box B; Described 6 outlets converging 1 header box B are YJV22 2*25mm by specification
2photovoltaic cable parallel connection access 7 converge 1 header box C; Described 2 remittance 1 header box A3,2 outlets converging 1 header box A4 are PV1-F1*10mm by specification
2photovoltaic cable parallel connection access 7 converge 1 header box C; The outlet of described component string 11, component string 12, component string 13, component string 14 is PV1-F 1*4mm by specification
2photovoltaic cable parallel connection access 7 converge 1 header box C; Described 7 outlets converging 1 header box C are YJV22 2*50mm by specification
2photovoltaic cable parallel connection access point in parallel.
Especially, described 2 remittance 1 header box A wire inlet loops adopt fuse protected, and outlet does not install proterctive equipment additional; Described 6 remittance 1 header box B adopt fuse protected to each solar module connection in series-parallel wire inlet loop, and the inlet wire that 2 remittance 1 header box A are incorporated to 6 remittance 1 header box B adopts direct inlet wire, and the 6 total outlets converging 1 header box B do not install proterctive equipment additional; Described 7 remittance 1 header box C adopt fuse protected to each solar module connection in series-parallel wire inlet loop, and the inlet wire that 2 remittance 1 header box A and 6 remittance 1 header box B are incorporated to 7 remittance 1 header box C adopts direct inlet wire, and circuit breaker is installed in the 7 total outlets converging 1 header box C additional.
The distributed photovoltaic convergence system that the utility model proposes overcomes the high shortcoming of conventional photovoltaic convergence system cable loss, by increasing the progression that confluxes, increasing photovoltaic cable conductor cross-section minimizing cable resistance and pressure drop, reduce system loss, improve systems generate electricity amount.
Accompanying drawing explanation
The distributed photovoltaic convergence system structural representation that Fig. 1 provides for the utility model embodiment;
The solar module string wiring schematic diagram that Fig. 2 provides for the utility model embodiment.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.Be understandable that, specific embodiment described herein only for explaining the utility model, but not to restriction of the present utility model.It also should be noted that, for convenience of description, the part relevant to the utility model is illustrate only but not full content in accompanying drawing, unless otherwise defined, all technology used herein and scientific terminology are identical with belonging to the implication that those skilled in the art of the present utility model understand usually.The object of the term used in specification of the present utility model herein just in order to describe specific embodiment, is not intended to be restriction the utility model.Term as used herein " and/or " comprise arbitrary and all combinations of one or more relevant Listed Items.
Please refer to shown in Fig. 1, the distributed photovoltaic convergence system structural representation that Fig. 1 provides for the utility model embodiment, in figure, ZJC1-ZJC16 represents component string 1-component string 16 respectively.
In the present embodiment, distributed photovoltaic convergence system specifically comprises solar module string, 2 remittance 1 header box A, 6 converge 1 header box B and 7 remittance, 1 header box C.Described solar module string is set to 16 strings, is respectively component string 1, component string 2, component string 3, component string 4, component string 5, component string 6, component string 7, component string 8, component string 9, component string 10, component string 11, component string 12, component string 13, component string 14, component string 15, component string 16.Described 2 remittance 1 header box A are set to four, be respectively 2 remittance 1 header box A1,2 remittance 1 header box A2,2 converge 1 header box A3,2 remittance 1 header box A4.
Wherein, described component string 1 and component string 2, component string 7 and component string 8, component string 9 and component string 10, component string 15 and component string 16 outlet by photovoltaic cable respectively corresponding access in parallel 2 converge 1 header box A1,2 and converge 1 header box A2,2 and converge 1 header box A3,2 and converge 1 header box A4; Photovoltaic cable parallel connection access 6 remittance 1 header box B are passed through in described component string 3, component string 4, component string 5, component string 6,2 remittance 1 header box A1,2 outlets converging 1 header box A2; The outlet of described 6 remittance 1 header box B, 2 remittance 1 header box A3,2 remittance 1 header box A4, component string 11, component string 12, component string 13, component string 14 accesses 7 remittance 1 header box C by photovoltaic cable parallel connection.
In the present embodiment, the outlet of described component string 1 and component string 2, component string 7 and component string 8, component string 9 and component string 10, component string 15 and component string 16 is PV1-F 1*4mm by specification
2photovoltaic cable respectively corresponding access in parallel 2 converge 1 header box A1,2 and converge 1 header box A2,2 and converge 1 header box A3,2 and converge 1 header box A4.The outlet of described component string 3, component string 4, component string 5, component string 6 is PV1-F1*4mm by specification
2photovoltaic cable parallel connection access 6 converge 1 header box B.Described 2 remittance 1 header box A1,2 outlets converging 1 header box A2 are PV1-F 1*10mm by specification
2photovoltaic cable parallel connection access 6 converge 1 header box B.Described 6 outlets converging 1 header box B are YJV22 2*25mm by specification
2photovoltaic cable parallel connection access 7 converge 1 header box C.Described 2 remittance 1 header box A3,2 outlets converging 1 header box A4 are PV1-F1*10mm by specification
2photovoltaic cable parallel connection access 7 converge 1 header box C.The outlet of described component string 11, component string 12, component string 13, component string 14 is PV1-F 1*4mm by specification
2photovoltaic cable parallel connection access 7 converge 1 header box C.Described 7 outlets converging 1 header box C are YJV22 2*50mm by specification
2photovoltaic cable parallel connection access point in parallel.
Described 2 remittance 1 header box A wire inlet loops adopt fuse protected in the present embodiment, and outlet does not install proterctive equipment additional.Described 6 remittance 1 header box B adopt fuse protected to each solar module connection in series-parallel wire inlet loop, and the inlet wire that 2 remittance 1 header box A are incorporated to 6 remittance 1 header box B adopts direct inlet wire, and the 6 total outlets converging 1 header box B do not install proterctive equipment additional.Described 7 remittance 1 header box C adopt fuse protected to each solar module connection in series-parallel wire inlet loop, and the inlet wire that 2 remittance 1 header box A and 6 remittance 1 header box B are incorporated to 7 remittance 1 header box C adopts direct inlet wire, and circuit breaker is installed in the 7 total outlets converging 1 header box C additional.
According to formula:
U
cable=I
actualr
always(2)
Wherein, P
lossfor cable loss power, I
runfor the actual electric current flowing through cable, L
ibe i-th kind of cable length, ρ
copperfor the resistivity of copper, S
ibe i-th kind of cross-section of cable, U
cablefor the pressure drop that cable produces.
From formula (1) formula, increase the cross-section of cable and will reduce system loss power, relative to final 7 remittance 1 header box C, the present embodiment is connected to the total header box i.e. photovoltaic cable cross section of 7 remittance 1 header box C by increasing to each solar module series winding, thus reduce photovoltaic cable resistance, and then reduction pressure drop, reduce the loss power of photovoltaic cable; Known with reason formula (2) formula, increase photovoltaic cable cross section and be conducive to reducing the pressure drop produced on cable.
As shown in Figure 2, the solar module string wiring schematic diagram that Fig. 2 provides for the utility model embodiment, 201 refer to that specification is PV1-F 1*4mm
2photovoltaic cable, 202 refer to specifications be PV1-F 1*10mm
2photovoltaic cable, 203 refer to specifications be YJV22 2*25mm
2photovoltaic cable, 204 refer to specifications be YJV22 2*50mm
2photovoltaic cable.And, as can be seen from Figure 1, carry out one-level with distance header box C 4 cover supports farthest and conflux, use 2 remittance 1 header box A; Carry out secondary with non-header box C place row to conflux, use header box B, determined by the component string number accessed and header box A outlet number, use 6 remittance 1 header box B; The component string that header box C accesses as required, header box A, header box B number of outgoing determine, use 7 remittance 1 header box C.In the present embodiment, distributed photovoltaic convergence system take into account the cost increase increasing and may cause in photovoltaic cable cross section, possesses skills economical advanced.
The technical solution of the utility model overcomes the high shortcoming of conventional photovoltaic convergence system cable loss, by increasing the progression that confluxes, increasing photovoltaic cable conductor cross-section minimizing cable resistance and pressure drop, reduce system loss, improve systems generate electricity amount, shorten the return on investment cycle.
Note, above are only preferred embodiment of the present utility model and institute's application technology principle.Skilled person in the art will appreciate that the utility model is not limited to specific embodiment described here, various obvious change can be carried out for a person skilled in the art, readjust and substitute and protection range of the present utility model can not be departed from.Therefore, although be described in further detail the utility model by above embodiment, but the utility model is not limited only to above embodiment, when not departing from the utility model design, can also comprise other Equivalent embodiments more, and scope of the present utility model is determined by appended right.
Claims (3)
1. a distributed photovoltaic convergence system, is characterized in that, comprises solar module string, 2 remittance 1 header box A, 6 converge 1 header box B and 7 remittance, 1 header box C; Described solar module string is set to 16 strings, be respectively component string 1, component string 2, component string 3, component string 4, component string 5, component string 6, component string 7, component string 8, component string 9, component string 10, component string 11, component string 12, component string 13, component string 14, component string 15, component string 16, described 2 remittance 1 header box A are set to four, be respectively 2 remittance 1 header box A1,2 remittance 1 header box A2,2 converge 1 header box A3,2 remittance 1 header box A4;
The outlet of described component string 1 and component string 2, component string 7 and component string 8, component string 9 and component string 10, component string 15 and component string 16 by photovoltaic cable respectively corresponding access in parallel 2 converge 1 header box A1,2 and converge 1 header box A2,2 and converge 1 header box A3,2 and converge 1 header box A4; Photovoltaic cable parallel connection access 6 remittance 1 header box B are passed through in described component string 3, component string 4, component string 5, component string 6,2 remittance 1 header box A1,2 outlets converging 1 header box A2; The outlet of described 6 remittance 1 header box B, 2 remittance 1 header box A3,2 remittance 1 header box A4, component string 11, component string 12, component string 13, component string 14 accesses 7 remittance 1 header box C by photovoltaic cable parallel connection.
2. distributed photovoltaic convergence system according to claim 1, is characterized in that, the outlet of described component string 1 and component string 2, component string 7 and component string 8, component string 9 and component string 10, component string 15 and component string 16 is PV1-F 1*4mm by specification
2photovoltaic cable respectively corresponding access in parallel 2 converge 1 header box A1,2 and converge 1 header box A2,2 and converge 1 header box A3,2 and converge 1 header box A4; The outlet of described component string 3, component string 4, component string 5, component string 6 is PV1-F 1*4mm by specification
2photovoltaic cable parallel connection access 6 converge 1 header box B; Described 2 remittance 1 header box A1,2 outlets converging 1 header box A2 are PV1-F 1*10mm by specification
2photovoltaic cable parallel connection access 6 converge 1 header box B; Described 6 outlets converging 1 header box B are YJV222*25mm by specification
2photovoltaic cable parallel connection access 7 converge 1 header box C; Described 2 remittance 1 header box A3,2 outlets converging 1 header box A4 are PV1-F 1*10mm by specification
2photovoltaic cable parallel connection access 7 converge 1 header box C; The outlet of described component string 11, component string 12, component string 13, component string 14 is PV1-F 1*4mm by specification
2photovoltaic cable parallel connection access 7 converge 1 header box C; Described 7 outlets converging 1 header box C are YJV222*50mm by specification
2photovoltaic cable parallel connection access point in parallel.
3. the distributed photovoltaic convergence system according to any one of claim 1 or 2, is characterized in that, described 2 remittance 1 header box A wire inlet loops adopt fuse protected, and outlet does not install proterctive equipment additional; Described 6 remittance 1 header box B adopt fuse protected to each solar module connection in series-parallel wire inlet loop, and the inlet wire that 2 remittance 1 header box A are incorporated to 6 remittance 1 header box B adopts direct inlet wire, and the 6 total outlets converging 1 header box B do not install proterctive equipment additional; Described 7 remittance 1 header box C adopt fuse protected to each solar module connection in series-parallel wire inlet loop, and the inlet wire that 2 remittance 1 header box A and 6 remittance 1 header box B are incorporated to 7 remittance 1 header box C adopts direct inlet wire, and circuit breaker is installed in the 7 total outlets converging 1 header box C additional.
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| CN201420689944.XU CN204231288U (en) | 2014-11-17 | 2014-11-17 | A kind of distributed photovoltaic convergence system |
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| CN201420689944.XU CN204231288U (en) | 2014-11-17 | 2014-11-17 | A kind of distributed photovoltaic convergence system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106100571A (en) * | 2016-07-21 | 2016-11-09 | 南京南瑞继保电气有限公司 | A kind of group string data photovoltaic DC-to-AC converter exchange wiring construction in parallel and grid-connected unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106100571A (en) * | 2016-07-21 | 2016-11-09 | 南京南瑞继保电气有限公司 | A kind of group string data photovoltaic DC-to-AC converter exchange wiring construction in parallel and grid-connected unit |
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Granted publication date: 20150325 Termination date: 20171117 |
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