CN219612134U - Photovoltaic grid-connected circuit board and photovoltaic grid-connected device - Google Patents
Photovoltaic grid-connected circuit board and photovoltaic grid-connected device Download PDFInfo
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- CN219612134U CN219612134U CN202320293192.4U CN202320293192U CN219612134U CN 219612134 U CN219612134 U CN 219612134U CN 202320293192 U CN202320293192 U CN 202320293192U CN 219612134 U CN219612134 U CN 219612134U
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- photovoltaic grid
- circuit board
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- side edge
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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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Abstract
The utility model is suitable for the technical field of photovoltaic power generation, and provides a photovoltaic grid-connected circuit board and a photovoltaic grid-connected device. The photovoltaic grid-connected circuit board comprises: the system comprises a PCB, a direct current switch arranged on the PCB, a boosting module, at least one bus supporting capacitor and an inversion module; the direct current switch and the boost module are longitudinally arranged along the first side edge of the PCB; the at least one busbar support capacitor is arranged adjacent to the boosting module, and is transversely arranged along a second side perpendicular to the first side; the switching tubes in the inversion module are arranged in a row and are arranged parallel to at least one bus supporting capacitor. According to the utility model, at least one bus bar supporting capacitor is transversely arranged along a second side edge perpendicular to the first side edge, and switching tubes in the inversion module are arranged in a row and are arranged in parallel with the bus bar supporting capacitor. And the reactive power and the power density of the photovoltaic grid-connected circuit board are conveniently improved.
Description
Technical Field
The utility model belongs to the technical field of photovoltaic power generation, and particularly relates to a photovoltaic grid-connected circuit board and a photovoltaic grid-connected device.
Background
In a solar photovoltaic power generation system, a solar photovoltaic cell array is generally connected to a power grid through a direct current switch, a boosting module, a bus supporting capacitor and an inversion module. With the development of industrial technology, the requirements of users on the power density of the solar photovoltaic power generation system are increasing, and in some scenes, the requirements of users on the reactive power provided by the bus bar support capacitor are also increasing.
Currently, photovoltaic grid-connected circuit boards are generally constructed by disposing dc switches, boost modules, bus bar support capacitors, inverter modules, etc. on a printed circuit board (Printed Circuit Board, PCB). However, the layout structure of the existing photovoltaic grid-connected circuit board is not beneficial to the improvement of the power density and reactive power of the solar photovoltaic power generation system.
Disclosure of Invention
In view of the above, the embodiment of the utility model provides a photovoltaic grid-connected circuit board and a photovoltaic grid-connected device, so as to solve the problem that the current photovoltaic grid-connected circuit board is unfavorable for improving the power density and reactive power.
A first aspect of an embodiment of the present utility model provides a photovoltaic grid-connected circuit board, including: the system comprises a PCB, a direct current switch arranged on the PCB, a boosting module, at least one bus supporting capacitor and an inversion module;
the direct current switch and the boosting module are longitudinally arranged along the first side edge of the PCB;
the at least one busbar support capacitor is arranged adjacent to the boosting module, and is transversely arranged along a second side perpendicular to the first side;
the switching tubes in the inversion module are arranged in a row and are parallel to the at least one bus supporting capacitor.
In an embodiment, the photovoltaic grid-connected circuit board further comprises a relay module and an internal fan;
the relay module is arranged along a third side opposite to the first side;
the internal fan is arranged between a switching tube far away from the first side in the inversion module and the relay module.
In an embodiment, the photovoltaic grid-connected circuit board further includes: a power module;
the power supply module is arranged between a switching tube in the inversion module and a fourth side edge of the PCB, and the fourth side edge is an edge, opposite to the second side edge, of the PCB;
the transformer in the power module is a single-stage two-in-one isolation transformer.
In an embodiment, the photovoltaic grid-connected circuit board further includes: a pre-stage filtering module;
the pre-stage filtering module is arranged between the direct current switch and the boosting module.
In an embodiment, the photovoltaic grid-connected circuit board further includes: an alternating current side filtering module;
the alternating current side filter module is arranged between the at least one bus bar supporting capacitor and a third side opposite to the first side.
In an embodiment, the photovoltaic grid-connected circuit board further includes: common mode inductance;
the common mode inductor is arranged between the relay module and a fourth side edge of the PCB, and the fourth side edge is an edge, opposite to the second side edge, of the PCB.
In an embodiment, the photovoltaic grid-connected circuit board further includes: a lightning protection module;
the lightning protection module is arranged between the common mode inductor and the fourth side edge.
A second aspect of an embodiment of the present utility model provides a photovoltaic grid-connected device, including a photovoltaic grid-connected circuit board according to any one of the above.
Compared with the prior art, the embodiment of the utility model has the beneficial effects that: according to the embodiment of the utility model, the direct current switch and the boosting module in the solar photovoltaic power generation system are longitudinally arranged along the first side of the PCB, at least one bus bar supporting capacitor is arranged adjacent to the boosting module, and at least one bus bar supporting capacitor is transversely arranged along the second side perpendicular to the first side, so that one, two or more bus bar supporting capacitors are conveniently arranged in the transverse direction of the PCB, and reactive power is improved; and because at least one bus bar support capacitor is transversely arranged along the second side edge perpendicular to the first side edge, the switching tubes in the inversion module can be arranged in a row and are arranged parallel to at least one bus bar support capacitor, so that the layout of components on the PCB is more compact, the size is reduced, and the power density is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a photovoltaic grid-connected circuit board according to an embodiment of the present utility model;
fig. 2 is a schematic structural diagram of a photovoltaic grid-connected circuit board according to another embodiment of the present utility model.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present utility model. It will be apparent, however, to one skilled in the art that the present utility model may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present utility model with unnecessary detail.
In order to illustrate the technical scheme of the utility model, the following description is made by specific examples.
Fig. 1 is a schematic structural diagram of a photovoltaic grid-connected circuit board provided by an embodiment of the present utility model, which is described in detail below, including: the power supply comprises a PCB 100, a direct current switch 10, a boosting module 11, at least one bus bar supporting capacitor 12 and an inversion module 13, wherein the direct current switch 10, the boosting module 11, the at least one bus bar supporting capacitor 12 and the inversion module 13 are arranged on the PCB.
The dc switch 10 and the boost module 11 are disposed longitudinally along a first side of the PCB board 100.
At least one busbar support capacitor 12 is disposed adjacent to the boost module 11, and at least one busbar support capacitor 12 is disposed laterally along a second side perpendicular to the first side.
The switching tubes 13 in the inverter module are arranged in a row, arranged parallel to at least one bus bar support capacitor 12.
As shown in connection with fig. 1, the left side of the PCB board 100 may be referred to as a first side and the upper side may be referred to as a second side. The dc switch 10 and the boost module 11 are longitudinally disposed along the left side of the PCB 100 and the at least one bus bar support capacitor 12 is transversely disposed along the upper side of the PCB.
The dc switch 10 may be used to connect to the solar photovoltaic cell array, and connect the current output by the solar cell array to the bus through the boost module 11, where the boost module 11 may be a DCDC boost module, such as a boost chopper circuit, for increasing the voltage of the solar photovoltaic cell array and tracking the maximum power point of the solar photovoltaic cell array. The bus is connected with an electrolytic capacitor with work rate supporting function, namely a bus supporting capacitor in parallel, so that the required reactive power is conveniently provided for the solar photovoltaic power generation system. The inversion module used for converting the low-voltage direct current output by the solar photovoltaic cell array into alternating current matched with the power grid and sending the alternating current into the power grid can select an inversion circuit of a Heric topology.
The bus supporting capacitors occupy a larger space on the PCB 100, and for the photovoltaic grid-connected circuit board with larger reactive power requirement, a larger number of bus supporting capacitors are needed, which occupies a larger space of the PCB, thereby being unfavorable for improving the power density.
In this embodiment, at least one bus bar supporting capacitor 12 is transversely arranged along the upper side edge of the PCB board 100, so that the switching tubes (for example, 6 switching tubes in the Heric topology) in the inverter module are arranged in parallel to at least one bus bar supporting capacitor in a row, so that the layout of the components on the PCB board 100 is more compact, thereby being beneficial to reducing the volume and improving the power density.
On the basis, the switching tubes in the inversion module can be fixed on the PCB through a radiator, and the switching tubes in the inversion module are arranged in a row parallel to at least one bus supporting capacitor instead of being partially transversely arranged and partially vertically arranged, so that the radiator can be not required to be made into a special-shaped structure corresponding to the switching tubes, and the inverter is convenient to manufacture.
According to the embodiment of the utility model, the direct current switch and the boosting module in the solar photovoltaic power generation system are longitudinally arranged along the first side of the PCB, at least one bus bar supporting capacitor is arranged adjacent to the boosting module, and at least one bus bar supporting capacitor is transversely arranged along the second side perpendicular to the first side, so that one, two or more bus bar supporting capacitors are conveniently arranged in the transverse direction of the PCB, and reactive power is improved; and because at least one bus bar support capacitor is transversely arranged along the second side edge perpendicular to the first side edge, the switching tubes in the inversion module can be arranged in a row and are arranged parallel to at least one bus bar support capacitor, so that the layout of components on the PCB is more compact, the size is reduced, and the power density is improved.
Optionally, referring to fig. 2, the photovoltaic grid-connected circuit board provided by the embodiment of the present utility model may further include a relay module 14 and an internal fan 15.
The relay module 14 is disposed along a third side opposite the first side.
The internal blower 15 is arranged between the switching tube and the relay module 14 at a position far from the first side in the inverter module.
As shown in connection with fig. 1 and 2, the right side of the PCB board may be denoted as a third side, and the relay module 14 may be disposed along the right side of the PCB board 100, specifically, may be disposed between the switching tube 13 in the inverter module and the right side of the PCB board 100. On the basis of this, an internal fan 15 is arranged between the switching tube 13 and the relay module 14 in the inverter module.
In this embodiment, the internal fan 15 is disposed between the switching tube 13 and the relay module 14 in the inverter module, so that the internal fan 15 directly blows the relay module 14, thereby blowing heat of the relay module 14 to a side wall of a chassis where the photovoltaic grid-connected circuit board is located, and blowing out hot air through the side wall of the chassis, flowing to two ends, and circulating through an air channel formed by at least one bus supporting capacitor 12 and the switching tube 13 in the inverter module, so that heat flow inside the whole chassis flows, thereby playing a role of turbulence, avoiding the situation that the chassis where the photovoltaic grid-connected circuit board is located is locally overheated or supercooled, and enabling various components on the photovoltaic grid-connected circuit board to be in a relatively balanced temperature range. Therefore, the heat dissipation of the photovoltaic grid-connected circuit board is optimized through the air duct planning, so that the photovoltaic grid-connected circuit board can meet the requirements of heat while improving the power density and reactive power.
For example, as shown in fig. 2, for a single-phase photovoltaic grid-tie circuit board, four relays may be employed for relay module 14. The number of relays included in the relay module 14 is not limited in this embodiment, and may be set according to actual requirements.
Optionally, referring to fig. 2, the photovoltaic grid-connected circuit board provided by the embodiment of the present utility model may further include: a power module 16.
The power module 16 is disposed between the switching tube 13 in the inverter module and a fourth side of the PCB board 100, which is a side of the PCB board 100 opposite to the second side.
The transformer in the power module 16 is a single-stage two-in-one isolation transformer.
As shown in fig. 2, the lower side of the PCB board 100 may be referred to as a fourth side, that is, the power module 16 is disposed between the switching tube 13 in the inverter module and the lower side of the PCB board 100.
The power module 16 is a power source of the whole machine, and a main control board can be mounted on the power module 16 to provide a main control loop required by the photovoltaic grid-connected circuit board.
In order to provide a power source accessible to an external human body, the power module needs to be isolated by a two-stage transformer. In this embodiment, the transformer in the power module 16 adopts a single-stage two-in-one isolation transformer, so that the two-stage transformers can be integrated into one, and the volume of the photovoltaic grid-connected circuit board is further reduced, so that the overall appearance volume of the chassis where the photovoltaic grid-connected circuit board is located is further reduced.
Optionally, referring to fig. 2, the photovoltaic grid-connected circuit board provided by the embodiment of the present utility model may further include: a pre-filtering module 17.
The pre-filter module 17 is arranged between the dc switch 10 and the boost module 11.
In this embodiment, the pre-stage filter module 17 may be a pre-stage filter capacitor, and the pre-stage filter module 17 is disposed between the dc switch 10 and the boost module 11, so as to facilitate routing.
Optionally, referring to fig. 2, the photovoltaic grid-connected circuit board provided by the embodiment of the present utility model may further include: an ac side filtering module 18.
The ac side filter module 18 is disposed between the at least one bus bar support capacitor 12 and a third side opposite the first side.
As shown in fig. 2, the ac side filter module 18 may be an ac side filter capacitor, and the ac side filter module 18 is disposed between the at least one bus bar supporting capacitor 12 and the right side of the PCB board 100, so as to facilitate routing.
Optionally, referring to fig. 2, the photovoltaic grid-connected circuit board provided by the embodiment of the present utility model may further include: common mode inductance 19.
The common mode inductance 19 is disposed between the relay module 14 and a fourth side of the PCB board 100, which is a side of the PCB board 100 opposite to the second side.
As shown in fig. 2, the common mode inductance 19 may be disposed between the relay module 14 and the lower side of the PCB board 100, sequentially downward along the relay module 14.
Optionally, referring to fig. 2, the photovoltaic grid-connected circuit board provided by the embodiment of the present utility model may further include: a lightning protection module 20.
The lightning protection module 20 is arranged between the common mode inductance 19 and the fourth side.
As shown in fig. 2, the lightning protection module 20 may be disposed between the common mode inductance 19 and the lower side of the PCB board 100, sequentially downward along the common mode inductance. Illustratively, the lightning protection module 20 may include a lightning protection, ground, and tamper-free Y-capacitor.
As a further embodiment of the present utility model, the present utility model also includes a photovoltaic grid-connected device comprising the photovoltaic grid-connected circuit board of any of the above embodiments. The photovoltaic grid-connected device has the same beneficial effects as the photovoltaic grid-connected circuit board in any one of the embodiments, and is not described herein.
The above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model, and are intended to be included in the scope of the present utility model.
Claims (8)
1. A photovoltaic grid-tie circuit board, comprising: the system comprises a PCB, a direct current switch arranged on the PCB, a boosting module, at least one bus supporting capacitor and an inversion module;
the direct current switch and the boosting module are longitudinally arranged along the first side edge of the PCB;
the at least one busbar support capacitor is arranged adjacent to the boosting module, and is transversely arranged along a second side perpendicular to the first side;
the switching tubes in the inversion module are arranged in a row and are parallel to the at least one bus supporting capacitor.
2. The photovoltaic grid-tie circuit board of claim 1, further comprising a relay module and an internal fan;
the relay module is arranged along a third side opposite to the first side;
the internal fan is arranged between a switching tube far away from the first side in the inversion module and the relay module.
3. The photovoltaic grid-tie circuit board of claim 1 or 2, further comprising: a power module;
the power supply module is arranged between a switching tube in the inversion module and a fourth side edge of the PCB, and the fourth side edge is an edge, opposite to the second side edge, of the PCB;
the transformer in the power module is a single-stage two-in-one isolation transformer.
4. The photovoltaic grid-tie circuit board of claim 3, further comprising: a pre-stage filtering module;
the pre-stage filtering module is arranged between the direct current switch and the boosting module.
5. The photovoltaic grid-tie circuit board of claim 3, further comprising: an alternating current side filtering module;
the alternating current side filter module is arranged between the at least one bus bar supporting capacitor and a third side opposite to the first side.
6. The photovoltaic grid-tie circuit board of claim 2, further comprising: common mode inductance;
the common mode inductor is arranged between the relay module and a fourth side edge of the PCB, and the fourth side edge is an edge, opposite to the second side edge, of the PCB.
7. The photovoltaic grid-tie circuit board of claim 6, further comprising: a lightning protection module;
the lightning protection module is arranged between the common mode inductor and the fourth side edge.
8. A photovoltaic grid-tie device comprising the photovoltaic grid-tie circuit board of any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320293192.4U CN219612134U (en) | 2023-02-23 | 2023-02-23 | Photovoltaic grid-connected circuit board and photovoltaic grid-connected device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320293192.4U CN219612134U (en) | 2023-02-23 | 2023-02-23 | Photovoltaic grid-connected circuit board and photovoltaic grid-connected device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219612134U true CN219612134U (en) | 2023-08-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320293192.4U Active CN219612134U (en) | 2023-02-23 | 2023-02-23 | Photovoltaic grid-connected circuit board and photovoltaic grid-connected device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219612134U (en) |
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2023
- 2023-02-23 CN CN202320293192.4U patent/CN219612134U/en active Active
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