CN113104165A - Surface of water photovoltaic strutting arrangement - Google Patents
Surface of water photovoltaic strutting arrangement Download PDFInfo
- Publication number
- CN113104165A CN113104165A CN202110490572.2A CN202110490572A CN113104165A CN 113104165 A CN113104165 A CN 113104165A CN 202110490572 A CN202110490572 A CN 202110490572A CN 113104165 A CN113104165 A CN 113104165A
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- assembly
- bearing seat
- seat
- water surface
- support device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
- B63B2035/4433—Floating structures carrying electric power plants
- B63B2035/4453—Floating structures carrying electric power plants for converting solar energy into electric energy
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention discloses a water surface photovoltaic supporting device, wherein an outer pile cylinder is arranged on a grouting foundation pile, an inner pile cylinder is sleeved in the outer pile cylinder and can slide up and down along the outer pile cylinder, the top of the inner pile cylinder is connected with a supporting assembly, a plurality of inclined rods are arranged between the side surface of the inner pile cylinder and the supporting assembly at intervals, a plurality of floating cylinders are fixedly arranged on the side surface of the supporting assembly, an angle adjusting assembly is arranged at the top of the supporting assembly, and a photovoltaic assembly is fixedly arranged on the angle adjusting assembly. The invention can fully ensure the stable fixation of the water surface photovoltaic module, reduce the action of heavy pressure through elastic support, increase the sun-facing direction of the module in a limited space and improve the sampling efficiency of the module.
Description
Technical Field
The invention belongs to the technical field of photovoltaic modules, and particularly relates to a water surface photovoltaic supporting device.
Background
Solar energy is a renewable energy source with abundant resources, wide distribution and no pollution, and the solar energy makes an extremely important contribution to the construction of green environment for many years.
Because the development of the photovoltaic power generation market is rapid, and available land resources are less and less, people develop a novel photovoltaic power station capable of floating on the water surface, and the photovoltaic power station floats on the water surface by utilizing a certain floating body and other supporting structures to collect the sun and generate power, so that the land utilization resources are relieved; however, most of the currently developed water surface photovoltaic modules have a single solar collection direction, cannot collect solar power to a large extent, and how to ensure the fixation stability of the water surface photovoltaic modules is still a great important problem.
Disclosure of Invention
The invention aims to solve the technical problem of providing a water surface photovoltaic supporting device aiming at the defects in the prior art, which ensures that a photovoltaic module is stably fixed on a water surface, increases the direction of sunlight collection through an angle adjusting device and improves the efficiency of water surface photovoltaic power generation.
The invention adopts the following technical scheme:
the utility model provides a surface of water photovoltaic strutting arrangement, includes the slip casting foundation pile, is provided with an outer pile section of thick bamboo on the slip casting foundation pile, and an outer pile section of thick bamboo endotheca is equipped with an inner pile section of thick bamboo, and an inner pile section of thick bamboo can slide from top to bottom along an outer pile section of thick bamboo, and the top of an inner pile section of thick bamboo is connected with supporting component, and the interval is provided with a plurality of down tubes between the side of an inner pile section of thick bamboo and the supporting component, and supporting component's side is fixed and is provided with a plurality of flotation pontoons, and.
Specifically, the supporting component comprises a pressure bearing seat, the pressure bearing seat is arranged at the end part of the inner pile barrel, the floating barrels are arranged at the outer side of the pressure bearing seat at intervals, and the pressure bearing seat is connected with the angle adjusting component through a connecting seat.
Further, be provided with the mounting plate seat on the pressure-bearing seat, connect through slowly pressing the subassembly between mounting plate seat and the connecting seat, slowly press the subassembly to include a plurality ofly, the interval sets up on the mounting plate seat, mounting plate seat top edge and connecting seat bottom edge sealing connection have the flexible glue cover.
Furthermore, the pressure-relieving assembly comprises an outer barrel, a sliding block is arranged in the outer barrel, a plurality of rigid springs are arranged between the bottom of the sliding block and the outer barrel, the top of the sliding block is connected with one end of an inner sliding column, and a top plate is arranged at the other end of the inner sliding column.
Still further, the opening of the end face of the outer barrel is provided with a guide ring.
Furthermore, a plurality of hemispherical grooves are formed at the joint of the outer side surface of the sliding block and the outer cylinder at intervals, and balls are correspondingly arranged in the hemispherical grooves.
Specifically, the angle adjusting assembly comprises a bearing seat, the bottom of the bearing seat is connected with one end of a rotatable crank, the other end of the rotatable crank is connected with a rotating ring arranged on a screw rod, and one end of the screw rod is connected with a motor.
Further, bear seat and motor and pass through the linkage seat and set up on supporting component.
Furthermore, the rotatable crank comprises a triangular handle and a straight handle, the top end of the triangular handle is obliquely connected to the bearing seat, the bottom end of the triangular handle is rotationally connected with one end of the straight handle, and the other end of the straight handle is obliquely connected to the rotating ring.
Specifically, the outer side of the outer pile cylinder is fixedly provided with a lifting wing.
Compared with the prior art, the invention has at least the following beneficial effects:
according to the water surface photovoltaic supporting device, the grouting pile foundation is used as a fixed base, the underwater stability of the device is improved, the slidable inner pile barrel is arranged in the outer pile barrel, the photovoltaic module can float in a certain range, the rotatable crank is driven by a thread-driven adjusting mode to change the sun-facing direction of the photovoltaic module, and the sampling rate is greatly improved.
Furthermore, the supporting component can ensure that the photovoltaic component and the angle adjusting component stably float on the water surface.
Furthermore, the pressure relief assembly elastically supports the angle adjusting assembly and the photovoltaic assembly through a plurality of rigid springs, so that partial elasticity and gravity can be reduced to offset, and the heavy pressure on the pressure bearing seat is reduced. The purpose of arranging the soft rubber sleeve as the connecting component of the mounting plate seat and the connecting seat is to adapt to the flexible connection of the pressure-relieving component along with the continuous change of the buoyancy of the water surface.
Furthermore, the pressure relief assembly comprises an inner sliding column, a guide ring, a sliding block, a spring, an outer barrel with a cavity structure, a ball and a top plate. Each part of the pressure-relieving assembly is arranged to elastically support the angle adjusting device and the photovoltaic assembly, so that part of elastic force is counteracted with gravity, and the heavy pressure on the pressure-bearing seat is reduced.
Furthermore, the purpose of arranging the correcting ring is to correct the moving direction of the inner sliding column and prevent the skew condition.
Furthermore, the purpose of setting up the ball is to let interior traveller and slider carry out sliding connection, reduces the device damage that leads to because of the friction.
Furthermore, the angle adjusting assembly is arranged to flexibly change the sun-facing direction of the photovoltaic assembly, so that the sampling efficiency is improved.
Furthermore, the linkage seat and the connecting seat are connected in an adaptive manner, so that the contact area between the angle adjusting assembly and the connecting seat can be increased, and the angle adjusting assembly and the connecting seat are stably and tightly connected.
Furthermore, the combination of the triangular handle and the straight handle can meet the requirement that the assembly is installed according to a certain inclination angle, and the assembly can absorb sunlight at the optimal angle. This setting can satisfy photovoltaic module multi-angle sampling.
Furthermore, the lifting wings can be arranged to assist in supporting the outer pile casing from a mechanical angle.
In conclusion, the invention can fully ensure the stable fixation of the photovoltaic module on the water surface, reduce the action of heavy pressure through elastic support, increase the sun-facing direction of the module in a limited space and improve the sampling efficiency of the module.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view of the support assembly of the present invention;
FIG. 3 is a cross-sectional view of the angle adjustment assembly of the present invention;
FIG. 4 is a schematic view of a pressure relief assembly according to the present invention.
Wherein: 1. a photovoltaic module; 2. an angle adjustment assembly; 201. a rotatable crank; 202. a motor; 203. a linkage seat; 204. a screw; 205. rotating the ring; 206. a bearing seat; 3. a float bowl; 4. a diagonal bar; 5. an outer pile cylinder; 6. grouting foundation piles; 7. lifting the wing; 8. an inner pile cylinder; 9. a support assembly; 901. a pressure relief assembly; 9011. an inner strut; 9012. a pilot ring; 9013. a slider; 9014. a rigid spring; 9015. an outer cylinder; 9016. a ball bearing; 9017. a top plate; 902. installing a plate seat; 903. a pressure bearing seat; 904. a soft rubber sleeve; 905. a connecting seat.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "one side", "one end", "one side", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
Various structural schematics according to the disclosed embodiments of the invention are shown in the drawings. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
The invention provides a water surface photovoltaic supporting device, which elastically supports an angle adjusting assembly and a photovoltaic assembly through a plurality of rigid springs, so that part of elastic force is offset with heavy pressure to reduce the heavy pressure applied to a pressure bearing seat, and the angle adjusting assembly adopts a thread-driven adjusting moving mode to drive a rotatable crank to change the direction of the photovoltaic assembly facing the sun, so that the sun collecting efficiency is greatly improved.
Referring to fig. 1, the water surface photovoltaic supporting device of the present invention includes an underwater fixing pile, an angle adjusting assembly 2 and a supporting assembly 9; the supporting component 9 is arranged on the underwater fixing pile, and the angle adjusting component 2 is arranged on the supporting component 9. The underwater fixing pile comprises a grouting foundation pile 6, an outer pile tube 5, an inclined rod 4 and an inner pile tube 8, the top end of the grouting foundation pile 6 is fixedly connected with the bottom end of the outer pile tube 5 through a bolt, the upper half part of the outer pile tube 5 is provided with a sliding cavity along the central line thereof, the bottom of the inner pile tube 8 is arranged in the sliding cavity in a sliding manner, the top end of the inner pile tube 8 is fixedly connected with a supporting component 9, the outer side of the top part of the inner pile tube 8 is fixedly connected onto the bottom end face of the supporting component 9 through a plurality of inclined rods 4, and the top part of the supporting component 9 is provided with an angle adjusting component 2 capable of adjusting the direction of the optical component 1 facing the sun; photovoltaic module 1 fixed mounting is on angle adjusting part 2's top.
Specifically, the fixed flotation pontoon 3 that is provided with a plurality of evenly distributed in the outside of supporting component 9 bottom, flotation pontoon 3 can change according to the water level, and then drives interior pile section of thick bamboo 8 and go on upper and lower sliding adjustment in the outer pile section of thick bamboo 6 slip cavity, and the fixed spacing ring that is provided with of top port department of outer pile section of thick bamboo 6 for the restricted slip in the slip cavity in bottom of interior pile section of thick bamboo 8 avoids the water level to cross high suddenly and leads to interior pile section of thick bamboo 8 to break away from the condition of outer pile section of thick bamboo 5.
Referring to fig. 2, the supporting assembly 9 includes a pressure-relieving assembly 901, a mounting plate seat 902, a pressure-bearing seat 103, a soft rubber sleeve 904 and a connecting seat 905; the pressure bearing seat 903 is fixedly arranged at the top end of the inner pile casing 8, a plurality of buoys 3 are fixedly arranged on the outer side of the pressure bearing seat 903, an installation plate seat 902 is fixedly arranged on the top end face of the pressure bearing seat 903, a plurality of uniform pressure relief assemblies 901 are fixedly arranged on the installation plate seat 902, and the top ends of the pressure relief assemblies 901 are jointly and fixedly connected to the bottom end face of the connecting seat 905;
the edge of the top end face of the mounting plate seat 902 is hermetically connected with the bottom end of a soft rubber sleeve 904, and the top end of the soft rubber sleeve 904 is hermetically connected with the edge of the bottom end face of the connecting seat 905.
Referring to fig. 4, the pressure relief assembly 901 includes an inner slide column 9011, a guide ring 9012, a slide 9013, a spring 9014, and an outer cylinder 9015 configured as a hollow structure; an opening is formed in the top end face of the outer barrel 9015, a guide ring 9012 is fixedly arranged at the opening, the inner diameter of the guide ring 9012 is equal to the outer diameter of the inner sliding column 9011, so that the inner sliding column 9011 is connected with the guide ring 9012 in a sliding mode, the bottom end of the inner sliding column 9011 extends into the inner cavity of the outer barrel 9013 and is fixedly connected with the sliding block 9013, the sliding block 9013 is arranged in the outer barrel 9015 in a sliding mode, one end of each rigid spring 9014 is fixedly connected to the bottom end face of the sliding block 9013, and the other end of each rigid spring 9014 is fixedly connected to the inner bottom face of the outer barrel 9015;
the top end of the inner sliding column 9011 is fixedly provided with a top plate 9017.
A plurality of hemispherical grooves are formed in the outer side surface of the sliding block 9013, and a ball 9016 is arranged in each hemispherical groove.
Referring to fig. 3, the angle adjusting assembly 2 includes a rotatable crank 201, a motor 202, a linkage seat 203, a screw 204, a rotary ring 205 and a bearing seat 206, the linkage seat 203 is adapted and fixedly mounted on a connecting seat 905, both left and right sides of the linkage seat 203 are provided with protrusions, the screw 204 is rotatably disposed between the two protrusions, a threaded sleeve is threadedly connected to an outer threaded surface of the screw 204, the rotary ring 205 is adapted and rotatably connected to an outer cylindrical surface of the threaded sleeve, one end of the rotatable crank 201 is fixedly connected to the rotary ring 205, the other end of the rotatable crank 201 is fixedly connected to a middle position of a bottom end surface of the bearing seat 206, a left end of the bearing seat 206 is rotatably connected to the protrusion on the left side, and the photovoltaic assembly 1 is fixedly mounted on the bearing seat 206;
the right end of the screw 204 is adapted to drive the drive end of the motor 202, the motor 202 being mounted in a raised cavity on the right side.
The rotatable crank 201 comprises a triangular handle and a straight handle, the top end of the triangular handle is obliquely connected to the bearing seat 206, the bottom end of the triangular handle is rotatably connected to one end of the straight handle, and the other end of the straight handle is obliquely connected to the rotating ring 205.
The outer side of the outer pile cylinder 5 is fixedly provided with a lifting wing 7.
In specific implementation, the bottom end of the underwater fixing pile in the device adopts the grouting foundation pile 6 as a fixing base, so that the underwater stability of the underwater fixing pile is improved, meanwhile, the top end of the underwater fixing pile is fixedly provided with the supporting component 9, and the periphery of the supporting component 9 is provided with the buoys 3, so that the supporting component 9 floats on the water surface, the heavy pressure of the underwater fixing pile is reduced, and the device is stable and reliable; be provided with among the supporting component 9 and slowly press subassembly 901, it carries out elastic support to angle adjusting subassembly 2 and photovoltaic module 1 through a plurality of stiff spring 9014 for partial elasticity offsets with heavy pressure, in order to reduce the heavy pressure that the pressure-bearing seat received, and, angle adjusting 2 subassembly adopts screw thread drive's regulation moving mode, drives rotatable crank 201 and changes photovoltaic module 1 towards the direction of sun, makes it improve to adopt positive efficiency by a wide margin.
In summary, the water surface photovoltaic supporting device provided by the invention has the following characteristics:
1. the bottom of the underwater fixing pile adopts a grouting foundation pile as a fixing base, so that the stability of the underwater fixing pile is improved, meanwhile, a supporting component is fixedly arranged at the top end of the underwater fixing pile, a floating barrel is arranged around the supporting component, and the supporting component is made to float on the water surface so as to reduce the heavy pressure of the underwater fixing pile, and the underwater fixing pile is stable and reliable.
2. Be provided with the pressure relief subassembly among the supporting component, it carries out elastic support through a plurality of rigid spring angle adjusting part and photovoltaic module for partial elasticity offsets with heavy pressure, in order to reduce the heavy pressure that the bearing seat received.
3. The angle adjusting assembly adopts a thread-driven adjusting moving mode to drive the rotatable crank to change the direction of the photovoltaic assembly facing the sun, so that the sun collecting efficiency is greatly improved.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (10)
1. The utility model provides a surface of water photovoltaic strutting arrangement, a serial communication port, including slip casting foundation pile (6), be provided with outer pile casing (5) on slip casting foundation pile (6), outer pile casing (5) endotheca is equipped with interior pile casing (8), interior pile casing (8) can slide from top to bottom along outer pile casing (5), the top of interior pile casing (8) is connected with supporting component (9), the interval is provided with a plurality of down tubes (4) between the side of interior pile casing (8) and supporting component (9), the fixed a plurality of flotation pontoons (3) that are provided with in side of supporting component (9), the top of supporting component (9) is provided with angle adjusting part (2), photovoltaic module (1) fixed mounting is on angle adjusting part (2).
2. The surface photovoltaic support device of claim 1, characterized in that the support assembly (9) comprises a bearing seat (903), the bearing seat (903) is arranged at the end of the inner pile casing (8), the buoys (3) are arranged at intervals outside the bearing seat (903), and the bearing seat (903) is connected with the angle adjusting assembly (2) through a connecting seat (905).
3. The water surface photovoltaic support device according to claim 2, wherein the pressure bearing seat (903) is provided with a mounting plate seat (902), the mounting plate seat (902) and the connecting seat (905) are connected through a pressure relief assembly (901), the pressure relief assembly (901) comprises a plurality of pressure relief assemblies, the pressure relief assemblies are arranged on the mounting plate seat (902) at intervals, and the top end edge of the mounting plate seat (902) and the bottom end edge of the connecting seat (905) are hermetically connected with a soft rubber sleeve (904).
4. The water surface photovoltaic support device as claimed in claim 3, wherein the pressure relief assembly (901) comprises an outer barrel (9015), a sliding block (9013) is arranged in the outer barrel (9015), a plurality of rigid springs (9014) are arranged between the bottom of the sliding block (9013) and the outer barrel (9015), the top of the sliding block (9013) is connected with one end of an inner sliding column (9011), and a top plate (9017) is arranged at the other end of the inner sliding column (9011).
5. The water surface photovoltaic support device as claimed in claim 4, wherein a pilot ring (9012) is arranged at an opening of an end face of the outer barrel (9015).
6. The water surface photovoltaic support device as claimed in claim 4, wherein a plurality of hemispherical grooves are formed at intervals at the joint of the outer side surface of the sliding block (9013) and the outer cylinder (9015), and balls (9016) are correspondingly arranged in the hemispherical grooves.
7. The water surface photovoltaic support device according to claim 1, wherein the angle adjusting assembly (2) comprises a bearing seat (206), the bottom of the bearing seat (206) is connected with one end of a rotatable crank (201), the other end of the rotatable crank (201) is connected with a rotating ring (205) arranged on a screw rod (204), and one end of the screw rod (204) is connected with a motor (202).
8. The surface photovoltaic support device according to claim 7, characterized in that the load-bearing seat (206) and the electric motor (202) are arranged on the support assembly (9) through a linkage seat (203).
9. The water surface photovoltaic support device according to claim 7, wherein the rotatable crank (201) comprises a triangular handle and a straight handle, the top end of the triangular handle is obliquely connected to the bearing seat (206), the bottom end of the triangular handle is rotatably connected with one end of the straight handle, and the other end of the straight handle is obliquely connected to the rotating ring (205).
10. The water surface photovoltaic support device according to claim 1, characterized in that the outer side of the outer pile cylinder (5) is fixedly provided with a lifting wing (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110490572.2A CN113104165A (en) | 2021-05-06 | 2021-05-06 | Surface of water photovoltaic strutting arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110490572.2A CN113104165A (en) | 2021-05-06 | 2021-05-06 | Surface of water photovoltaic strutting arrangement |
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| Publication Number | Publication Date |
|---|---|
| CN113104165A true CN113104165A (en) | 2021-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110490572.2A Pending CN113104165A (en) | 2021-05-06 | 2021-05-06 | Surface of water photovoltaic strutting arrangement |
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| CN (1) | CN113104165A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114475941A (en) * | 2022-01-04 | 2022-05-13 | 长江勘测规划设计研究有限责任公司 | Installation method of floating system suitable for high-latitude area and large-size photovoltaic module |
-
2021
- 2021-05-06 CN CN202110490572.2A patent/CN113104165A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114475941A (en) * | 2022-01-04 | 2022-05-13 | 长江勘测规划设计研究有限责任公司 | Installation method of floating system suitable for high-latitude area and large-size photovoltaic module |
| CN114475941B (en) * | 2022-01-04 | 2023-06-27 | 长江勘测规划设计研究有限责任公司 | Installation method of floating system suitable for high-latitude area and large-specification photovoltaic module |
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