CN204652311U - A kind of photovoltaic combiner box and photovoltaic system - Google Patents
A kind of photovoltaic combiner box and photovoltaic system Download PDFInfo
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- CN204652311U CN204652311U CN201520424370.8U CN201520424370U CN204652311U CN 204652311 U CN204652311 U CN 204652311U CN 201520424370 U CN201520424370 U CN 201520424370U CN 204652311 U CN204652311 U CN 204652311U
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- circuit
- combiner box
- photovoltaic
- photovoltaic combiner
- switch
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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
This application discloses a kind of photovoltaic combiner box and photovoltaic system, this photovoltaic combiner box comprises casing and is arranged on the circuit that confluxes in described casing, the described circuit that confluxes is for accumulating a positive negative output in road by N number of group of string of photovoltaic array, N > 1, the described circuit that confluxes comprises 2N DC switch and N number of DC/DC circuit, wherein: the both positive and negative polarity organizing string described in each is connected after 1 described DC switch respectively, accesses the positive-negative input end of 1 described DC/DC circuit; Access DC bus after the positive-negative output end of described N number of DC/DC circuit is connected in parallel, solving photovoltaic combiner box needs often to change fuse, and the problem that the photovoltaic system maintenance work at photovoltaic combiner box or its place is wasted time and energy.
Description
Technical field
The utility model relates to technical field of photovoltaic power generation, more particularly, relates to a kind of photovoltaic combiner box and photovoltaic system.
Background technology
Photovoltaic combiner box is the device for multiple groups of strings of photovoltaic array being accumulated a positive negative output in road.For the sake of security; existing photovoltaic combiner box fuse of connecting respectively on the both positive and negative polarity of each group of string is protected to provide reverse overcurrent; as shown in Figure 1, the both positive and negative polarity of N number of group of string (representing group string with PV) have been connected altogether 2N fuse (representing fuse with FU).But there is following drawback in the program:
1) fuse reverse overcurrent fusing, spoilage is high, needs often to change;
2) when safeguarding the photovoltaic system of photovoltaic combiner box or its place, needing to pull up each fuse to disconnect all groups of string inputs, installing one by one more later and go back, waste time and energy.
Utility model content
In view of this, the utility model provides a kind of photovoltaic combiner box and photovoltaic system, needs often to change fuse to solve photovoltaic combiner box, and the problem that the photovoltaic system maintenance work at photovoltaic combiner box or its place is wasted time and energy.
A kind of photovoltaic combiner box, comprise casing and be arranged on the circuit that confluxes in described casing, described in conflux circuit for N number of group of string of photovoltaic array being accumulated a positive negative output in road, N > 1, the described circuit that confluxes comprises 2N DC switch and N number of DC/DC circuit, wherein:
The both positive and negative polarity organizing string described in each is connected after 1 described DC switch respectively, accesses the positive-negative input end of 1 described DC/DC circuit;
DC bus is accessed after the positive-negative output end of described N number of DC/DC circuit is connected in parallel.
Alternatively, described in, the circuit that confluxes also comprises disconnect, wherein, again through described disconnect access DC bus after the positive-negative output end of described N number of DC/DC circuit is connected in parallel.
Wherein, described multiple DC/DC circuit is Boost circuit or is reverse excitation circuit.
Wherein, a described 2N DC switch is hand switch.
Wherein, a described 2N DC switch is electronic control switch.
Alternatively, described photovoltaic combiner box also comprises: the controller being arranged in described casing, being connected with described N number of DC/DC circuit with a described 2N DC switch.
Wherein, described controller has external communication interface.
Wherein, described outer communication interface is wired communication interface or wireless communication interface.
Alternatively, described photovoltaic combiner box also comprises: the local operation unit be arranged in described casing, being connected with described controller.
A kind of photovoltaic system, comprises any one photovoltaic combiner box above-mentioned.
As can be seen from above-mentioned technical scheme, the utility model DC switch replaces fuse, when needing to safeguard the photovoltaic system at photovoltaic combiner box and place thereof by disconnecting the electrical connection that each DC switch cuts off all groups of strings and confluxes between circuit, each DC switch is just directly closed to the electrical connection of connecting all groups of strings and conflux between circuit when needing to resume work, period does not relate to DC switch and repeatedly pulls up the process of installing again, facilitates the maintenance of photovoltaic system.Further, the utility model as anti-backflow device, there will not be reverse overcurrent phenomenon with DC/DC circuit, therefore realizing reverse overcurrent protection without the need to relending silk of fluxing, solving the problem that photovoltaic combiner box needs often to change fuse.In addition, described DC/DC circuit can also by carrying out MPPT maximum power point tracking to realize the power optimization to photovoltaic array to photovoltaic energy.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of photovoltaic combiner box structural representation disclosed in prior art;
Fig. 2 is a kind of photovoltaic combiner box structural representation disclosed in the utility model embodiment;
Fig. 3 is the utility model embodiment another photovoltaic combiner box structural representation disclosed;
Fig. 4 is the utility model embodiment another photovoltaic combiner box structural representation disclosed.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
See Fig. 2, the utility model embodiment discloses a kind of photovoltaic combiner box, need often to change fuse to solve photovoltaic combiner box, and the problem that the photovoltaic system maintenance work at photovoltaic combiner box or its place is wasted time and energy, it comprises casing and is arranged on the circuit that confluxes in described casing; The described circuit that confluxes is for accumulating a positive negative output in road by N number of group of string of photovoltaic array, and its building block at least comprises 2N DC switch (representing DC switch with S) and N number of DC/DC circuit, wherein:
The both positive and negative polarity organizing string described in each is connected after 1 described DC switch respectively, accesses the positive-negative input end of 1 described DC/DC circuit;
DC bus (representing DC bus with BUS) is accessed after the positive-negative output end of described N number of DC/DC circuit is connected in parallel.
The control signal that DC switch can apply according to the external world and requirement, manually or automatically disjunction or connection DC circuit.Based on this, the present embodiment DC switch replaces fuse, when needing to safeguard the photovoltaic system at photovoltaic combiner box or its place by disconnecting the electrical connection that each DC switch cuts off all groups of strings and confluxes between circuit, when needing the photovoltaic system work recovering photovoltaic combiner box or its place just directly closed each DC switch to the electrical connection of connecting all groups of strings and conflux between circuit.Compared to fuse, do not relate to DC switch in the process that use DC switch disconnects or connection group string inputs and repeatedly pull up the process of installing again, therefore facilitate the maintenance of the photovoltaic system at photovoltaic combiner box or its place.
In the present embodiment, a described 2N DC switch can adopt hand switch, as guillotine type switch etc.; Also electronic control switch can be adopted, as relay, electric operating switch etc.
DC/DC circuit is one-way circuit, can prevent electric current from entering photovoltaic side from DC bus side reverse flow, there will not be reverse overcurrent phenomenon, therefore without the need to using fuse to protect to provide reverse overcurrent.In addition, described DC/DC circuit can also by carrying out MPPT maximum power point tracking to realize the power optimization to photovoltaic array to photovoltaic energy, such that photovoltaic combiner box is no longer just simple strings to each group the effect of confluxing, and can also play power optimization effect.
In the present embodiment, described N number of DC/DC circuit can adopt Boost circuit, also can adopt reverse excitation circuit, not limit to.
In addition, see Fig. 3, based on above-described embodiment, the utility model discloses another photovoltaic combiner box, the circuit that confluxes in this photovoltaic combiner box also comprises: disconnect, wherein, again through described disconnect access DC bus after the positive-negative output end of described N number of DC/DC circuit is connected in parallel.Described disconnect is used for disconnecting the electrical connection of confluxing between circuit and late-class circuit when needing to safeguard the photovoltaic system at photovoltaic combiner box or its place.
In addition, when a described 2N DC switch is electronic control switch, based on above-mentioned any embodiment, the utility model discloses another photovoltaic combiner box, see Fig. 4, this photovoltaic combiner box also comprises: be arranged on the controller in the casing of photovoltaic combiner box, and described controller is connected with described N number of DC/DC circuit with a described 2N DC switch, for judging photovoltaic system fault, controlling the operation of described N number of DC/DC circuit and control the break-make etc. of a described 2N DC switch.
Alternatively, described controller also has external communication interface, for externally sending the running status of photovoltaic combiner box or accepting external control instruction etc.Described communication interface can be wired communication interface, also can be wireless communication interface.
Alternatively, described photovoltaic combiner box also has and is arranged on local operation unit in casing, that be connected with described controller.Described local operation unit can comprise input equipment and output equipment, wherein: described output equipment is for showing the current state of the circuit that confluxes, as as described in 2N DC switch on off operating mode, as described in the operation halted state of N number of DC/DC circuit, the electrical quantity information etc. of N number of group of string, as typical implementation, described output equipment can be indicator light, charactron or liquid crystal display screen etc.; Described input equipment is used for the order of N number of DC/DC circuit operation described in input control, controls the order etc. of described 2N DC switch break-make, and as typical implementation, described input equipment can be operation keyboard.Or described local operation unit also can adopt the touch-screen integrating input/output function.
In sum, the utility model DC switch replaces fuse, when needing to safeguard the photovoltaic system at photovoltaic combiner box and place thereof by disconnecting the electrical connection that each DC switch cuts off all groups of strings and confluxes between circuit, each DC switch is just directly closed to the electrical connection of connecting all groups of strings and conflux between circuit when needing to resume work, period does not relate to DC switch and repeatedly pulls up the process of installing again, facilitates the maintenance of photovoltaic system.Further, the utility model as anti-backflow device, there will not be reverse overcurrent phenomenon with DC/DC circuit, therefore realizing reverse overcurrent protection without the need to relending silk of fluxing, solving the problem that photovoltaic combiner box needs often to change fuse.In addition, described DC/DC circuit can also by carrying out MPPT maximum power point tracking to realize the power optimization to photovoltaic array to photovoltaic energy.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from spirit or scope of the present utility model, can realize in other embodiments.Therefore, the utility model can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a photovoltaic combiner box, comprise casing and be arranged on the circuit that confluxes in described casing, the described circuit that confluxes is for accumulating a positive negative output in road by N number of group of string of photovoltaic array, N > 1, it is characterized in that, the described circuit that confluxes comprises 2N DC switch and N number of DC/DC circuit, wherein:
The both positive and negative polarity organizing string described in each is connected after 1 described DC switch respectively, accesses the positive-negative input end of 1 described DC/DC circuit;
DC bus is accessed after the positive-negative output end of described N number of DC/DC circuit is connected in parallel.
2. photovoltaic combiner box according to claim 1, is characterized in that, described in the circuit that confluxes also comprise disconnect, wherein, again through described disconnect access DC bus after the positive-negative output end of described N number of DC/DC circuit is connected in parallel.
3. photovoltaic combiner box according to claim 1 and 2, is characterized in that, described multiple DC/DC circuit is Boost circuit or is reverse excitation circuit.
4. photovoltaic combiner box according to claim 1 and 2, is characterized in that, a described 2N DC switch is hand switch.
5. photovoltaic combiner box according to claim 1 and 2, is characterized in that, a described 2N DC switch is electronic control switch.
6. photovoltaic combiner box according to claim 5, is characterized in that, described photovoltaic combiner box also comprises: the controller being arranged in described casing, being connected with described N number of DC/DC circuit with a described 2N DC switch.
7. photovoltaic combiner box according to claim 6, is characterized in that, described controller has external communication interface.
8. photovoltaic combiner box according to claim 7, is characterized in that, described outer communication interface is wired communication interface or wireless communication interface.
9. photovoltaic combiner box according to claim 6, is characterized in that, described photovoltaic combiner box also comprises: the local operation unit be arranged in described casing, being connected with described controller.
10. a photovoltaic system, is characterized in that, comprises the photovoltaic combiner box according to any one of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520424370.8U CN204652311U (en) | 2015-06-18 | 2015-06-18 | A kind of photovoltaic combiner box and photovoltaic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520424370.8U CN204652311U (en) | 2015-06-18 | 2015-06-18 | A kind of photovoltaic combiner box and photovoltaic system |
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| CN204652311U true CN204652311U (en) | 2015-09-16 |
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| CN201520424370.8U Active CN204652311U (en) | 2015-06-18 | 2015-06-18 | A kind of photovoltaic combiner box and photovoltaic system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110896227A (en) * | 2018-09-12 | 2020-03-20 | 阳光电源股份有限公司 | Photovoltaic power generation system and photovoltaic inverter |
| CN113508506A (en) * | 2020-12-31 | 2021-10-15 | 华为技术有限公司 | Photovoltaic power generation system, photovoltaic inverter and direct current collection flow box |
| US12095256B2 (en) | 2019-08-01 | 2024-09-17 | Huawei Digital Power Technologies Co., Ltd. | Fault isolation apparatus, direct current boost apparatus, and inverter apparatus |
-
2015
- 2015-06-18 CN CN201520424370.8U patent/CN204652311U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110896227A (en) * | 2018-09-12 | 2020-03-20 | 阳光电源股份有限公司 | Photovoltaic power generation system and photovoltaic inverter |
| CN110896227B (en) * | 2018-09-12 | 2021-11-02 | 阳光电源股份有限公司 | Photovoltaic power generation system and photovoltaic inverter |
| US12095256B2 (en) | 2019-08-01 | 2024-09-17 | Huawei Digital Power Technologies Co., Ltd. | Fault isolation apparatus, direct current boost apparatus, and inverter apparatus |
| CN113508506A (en) * | 2020-12-31 | 2021-10-15 | 华为技术有限公司 | Photovoltaic power generation system, photovoltaic inverter and direct current collection flow box |
| WO2022141526A1 (en) * | 2020-12-31 | 2022-07-07 | 华为数字能源技术有限公司 | Photovoltaic power generation system, photovoltaic inverter and direct-current combiner box |
| US12003096B2 (en) | 2020-12-31 | 2024-06-04 | Huawei Digital Power Technologies Co., Ltd. | Photovoltaic power generation system, photovoltaic inverter, and direct current combiner box |
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