CN115610603A

CN115610603A - Offshore floating photovoltaic system

Info

Publication number: CN115610603A
Application number: CN202110795903.3A
Authority: CN
Inventors: 于俊; 刘勇; 王建明
Original assignee: Das Solar Co Ltd
Current assignee: Das Solar Co Ltd
Priority date: 2021-07-14
Filing date: 2021-07-14
Publication date: 2023-01-17

Abstract

The invention discloses a marine floating photovoltaic system, and relates to the technical field of photovoltaic power generation. The system comprises: a plurality of showy photovoltaic module unit and seabed fixing device, showy photovoltaic module unit includes: the lower part of the floating body is provided with a floating plate, the upper part of the floating body is provided with a plurality of floating blocks with slopes, the floating blocks are oppositely arranged left and right, and the slope tops are positioned in the middle of the floating body; the supporting frame is positioned above the floating plates and surrounds the side edges of the floating plates; and the photovoltaic module is fixedly connected with the surface of the floating plate. Photovoltaic module is fixed in the body surface, the body outside by braced frame encloses and closes, forms and floats photovoltaic module unit. The floating photovoltaic module units are connected to form a flexible floating photovoltaic module array matched with sea surface fluctuation, and the flexible floating photovoltaic module array is fixedly connected with the seabed through a seabed fixing device. The device provided by the invention reserves the degree of freedom among the floating photovoltaic module units, and also enables the floating photovoltaic module array to be wholly flexible and to adapt to the fluctuation of the sea surface.

Description

Marine showy photovoltaic system

Technical Field

The invention relates to the technical field of photovoltaic power generation, in particular to a marine floating photovoltaic system.

Background

At present, most of the design concepts of the existing offshore photovoltaic power generation systems are in the form of floating structures based on the tradition of the petroleum industry. Namely, a large rigid structure is built, a photovoltaic module is arranged on the surface of the structure and is fixed on the sea, and solar energy is converted into electric energy through sunlight irradiation.

In order to resist the wind and waves at sea, a large-sized rigid structure in the offshore photovoltaic power generation system needs to have extremely high strength and extremely high rigidity, so the large-sized rigid structure in the form of the offshore photovoltaic power generation system is usually made of steel. Due to the fact that the energy density of the photovoltaic module is low, a large number of photovoltaic modules need to be used, and steel for a rigid structure supporting the photovoltaic modules is large in quantity, so that the economic benefit of the offshore photovoltaic power generation system is very low.

Disclosure of Invention

In view of the above, the present invention has been developed to provide an offshore floating photovoltaic system that overcomes, or at least partially solves, the above mentioned problems.

An offshore floating photovoltaic system, the system comprising: a plurality of floating photovoltaic module units and a seabed fixing device,

the floating photovoltaic module unit includes:

the lower part of the floating body is provided with a floating plate, the upper part of the floating body is provided with a plurality of floating blocks with slopes, the floating blocks are oppositely arranged left and right, and the slope tops are positioned in the middle of the floating body;

the supporting frame is positioned above the floating plates and surrounds the side edges of the floating plates;

the photovoltaic module is fixedly connected with the surface of the floating plate;

the photovoltaic assembly is fixed on the surface of the floating body, and the outside of the floating body is enclosed by the supporting frame to form a floating photovoltaic module unit; and the plurality of floating photovoltaic module units are connected to form a flexible floating photovoltaic module array matched with sea surface fluctuation, and the flexible floating photovoltaic module array is fixedly connected with the seabed through the seabed fixing device.

Optionally, the seabed fixing device comprises: the flexible floating photovoltaic module array is connected with the anchor blocks in an anchoring mode through the connecting devices.

Optionally, a protection device is arranged on the periphery of the flexible floating photovoltaic module array, and the protection device is fixedly connected with the flexible floating photovoltaic module array through a connecting cable.

Optionally, the protection device is fixedly connected with the seabed through the seabed fixing device.

Optionally, the photovoltaic module is packaged by a fluorine-containing polymer material.

Optionally, a plurality of grooves and a plurality of raised lines are arranged on the surface of the floating block.

Optionally, a fixing plate for supporting the supporting frame is arranged at the joint of the floating plate and the floating block.

Optionally, the outer wall of the support frame is provided with a plurality of projections for hinging the floating photovoltaic module units.

Optionally, the floating body is of a hollow structure or an internal filling structure, and the filling material is a lightweight foam material.

Optionally, the protection device is a circular ring.

In the scheme of the invention, a photovoltaic module is fixed on the surface of a floating block of a floating body, and a support frame is arranged on the periphery of the floating block to form a floating photovoltaic module unit capable of floating on the sea surface, wherein the support frame is made of steel, and the floating body is made of plastic; the floating photovoltaic module units are hinged to form a flexible floating photovoltaic module array, and the flexible floating photovoltaic module array is fixedly connected with the seabed through a seabed fixing device. The photovoltaic module floats on the water surface through the support of the floating body, the floating photovoltaic module arrays are formed by hinging the floating photovoltaic module units through the support frame, the degree of freedom among the floating photovoltaic module units is reserved, and the floating photovoltaic module arrays are integrally flexible, adapt to the fluctuation of the sea surface and move along with the wave of the sea surface.

The steel support frame is a stressed member in the floating photovoltaic module array, and bears loads transmitted between the floating photovoltaic module units when the floating photovoltaic module array moves along with the sea surface. The floating body made of plastic not only serves as a carrier for supporting the photovoltaic module, but also provides buoyancy for the floating photovoltaic module array. In addition, the upper surface of the floating body is oppositely arranged, and the floating body is of a slope structure similar to a herringbone structure, so that seawater flows out of the floating body along with the slope, the seawater is convenient to discharge automatically, and the seawater is prevented from being retained on the photovoltaic module; and because the structure of the formed herringbone slope is more streamlined, the acting force of sea surface wind load is reduced.

The system adopts a structural form that the photovoltaic module is fixed with the floating body and floats on the water surface, thereby avoiding the use of a large rigid structural body, reducing the construction cost of the offshore photovoltaic system and further improving the economic benefit of the offshore photovoltaic system.

The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings.

In the drawings:

FIG. 1 is a block diagram of an offshore floating photovoltaic system provided by an embodiment of the present invention;

fig. 2 is a block diagram of a floating photovoltaic module unit provided by an embodiment of the present invention;

fig. 3 is a structural view of a floating body according to an embodiment of the present invention;

FIG. 4 is a block diagram of a support frame provided by an embodiment of the present invention;

FIG. 5 is a block diagram of an offshore floating photovoltaic system with a protective device according to an embodiment of the present invention;

FIG. 6 is a block diagram of a flexible floating photovoltaic module array provided by an embodiment of the present invention;

FIG. 7 is a side view of a flexible floating photovoltaic module array provided by an embodiment of the present invention;

FIG. 8 is a block diagram of a floating offshore photovoltaic system during a deliquescence stage according to an embodiment of the invention;

fig. 9 is a structural diagram of a floating photovoltaic system at sea at a tidal current.

Reference numerals:

1. a floating photovoltaic module unit; 11. a float; 111. a floating plate; 112. floating blocks; 112a, a groove; 112b, convex strips; 113. a fixing plate; 12. a support frame; 121. a bump; 13. a photovoltaic module; 2. a seabed mooring means; 21. a connecting device; 22. an anchor block; 3. a floating photovoltaic module array; 31. a guard device.

Detailed Description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

The embodiment of the invention is applied.

Referring to fig. 1-9, there is shown an offshore floating photovoltaic system, the system comprising: a plurality of floating photovoltaic module units 1 and a seabed fixture 2,

the floating photovoltaic module unit 1 comprises:

the floating body 11 is provided with a floating plate 111 at the lower part and a plurality of floating blocks 112 with slopes at the upper part, the floating blocks 112 are oppositely arranged left and right, and the slope tops are positioned in the middle of the floating body 11;

the supporting frame 12 is positioned above the floating plates 111 and surrounds the side edges of the floating plates 111;

the photovoltaic module 13 is fixedly connected with the surface of the floating plate 111;

the photovoltaic module 13 is fixed on the surface of the floating body 11, and the outside of the floating body 11 is enclosed by the supporting frame 12 to form a floating photovoltaic module unit 1; the floating photovoltaic module units 1 are connected to form a flexible floating photovoltaic module array 3 matched with sea surface fluctuation, and the flexible floating photovoltaic module array 3 is fixedly connected with the seabed through the seabed fixing device 2.

In the embodiment of the invention, the photovoltaic module 13 is fixed on the surface of the floating block 112 of the floating body 11, the supporting frame 12 is arranged on the periphery of the floating block 112 to form the floating photovoltaic module unit 1 capable of floating on the sea surface, wherein the supporting frame 12 is made of steel, and the floating body 11 is made of plastic; a plurality of floating photovoltaic module units 1 are hinged to form a flexible floating photovoltaic module array 3, and the flexible floating photovoltaic module array 3 is fixedly connected with the seabed through a seabed fixing device 2. The photovoltaic module 13 floats on the water surface through the support of the floating body 11, the floating photovoltaic module arrays 3 are formed by hinging the floating photovoltaic module units 1 through the support frame 12, the freedom degree between the floating photovoltaic module units 1 is reserved, and the floating photovoltaic module arrays 3 are integrally flexible to adapt to the fluctuation of the sea surface and move along with the wave motion of the sea surface.

The steel support frame 12 is a stressed member in the floating photovoltaic module array 3, and bears the load transferred between the floating photovoltaic module units when the floating photovoltaic module array 3 moves with the sea surface. The floating body 11 made of plastic not only serves as a carrier for supporting the photovoltaic module 13, but also provides buoyancy for the floating photovoltaic module array 3. In addition, the upper surface of the floating body 11 is oppositely arranged, 2 floating blocks 112 form a slope structure similar to a herringbone, so that seawater flows out of the floating body 11 along with the slope, the seawater is convenient to self-discharge, and the seawater is prevented from being retained on the photovoltaic module 13; and because the structure of the formed herringbone slope is more streamlined, the acting force of sea surface wind load is reduced.

The system adopts a structural form that the photovoltaic module is fixed with the floating body and floats on the water surface, thereby avoiding the use of a large-scale steel structure body, reducing the construction cost of the offshore photovoltaic system and further improving the economic benefit of the offshore photovoltaic system.

In this embodiment, the supporting frame 12 is square, and the shape thereof may be set according to actual needs, and may also be circular or oval. The use of steel for the support frame 12 is merely an exemplary embodiment and should not be construed as limiting the support frame 12. The floating body 11 may be made of any polymer material such as polypropylene or polyethylene.

Further, with reference to fig. 1, the seabed installation 2 is shown to comprise: a connecting device 21 and a plurality of anchor blocks 22 fixed on the seabed, wherein the flexible floating photovoltaic module array 3 is connected with the anchor blocks 22 in an anchoring way through the connecting device 21.

In the embodiment of the invention, the anchor block 22 is fixed on the seabed of the sea and is in anchoring connection with the periphery of the flexible floating photovoltaic module array 3 through the connecting device 21, so that the flexible floating photovoltaic module array 3 is anchored in the local range of the sea area. The connecting device 21 in this embodiment is an anchor chain, and the anchor chain is long enough to adapt to the tide rising and the tide falling of the sea, as shown in fig. 8, and is in a tightened state when the tide rising, as shown in fig. 9, and is in a loosened state when the tide falling, wherein the length of the anchor chain is set according to the water level change of the sea area. The type of anchor blocks 22 and the number of anchor blocks used should be set according to the actual requirements of the underwater topography, water level changes, load size, and anchor chain or anchor block bearing capacity. The connection means 21 may also be an anchor line, which is selected according to the actual requirements.

Preferably, referring to fig. 5, it is shown that the flexible floating photovoltaic module array 3 is provided with a guard 31 at its periphery, which guard is fixedly connected to the flexible floating photovoltaic module array 3 by a connecting cable 32.

In the embodiment of the invention, the supporting frame 12 at the periphery of the flexible floating photovoltaic module array 3 is fixedly connected with the connecting cables 32, and is fixedly connected with the protective device 31 through the connecting cables 32, so that the protective device 31 is fixed at the periphery of the flexible floating photovoltaic module array 3, and the protective device 31 has the function of blocking floating foreign matters and reduces the impact of floaters on the flexible floating photovoltaic module array 3; in addition, the protection device 31 forms a constraint on the flexible floating photovoltaic module array 3, so that the overturn resistance performance of the flexible floating photovoltaic module array is better.

Further, with reference to fig. 5, the protection device 31 is shown in fixed connection with the seabed by means of the seabed mooring 2.

In the embodiment of the present invention, the periphery of the protection device 31 is anchored to the seabed through the seabed fixing device 2.

Still further, the photovoltaic module 13 is packaged by a fluorine-containing polymer material.

In the embodiment of the invention, the photovoltaic module 13 is packaged by the fluorine-containing polymer material, when the photovoltaic module 13 is subjected to external load to cause fragmentation of the internal battery, the internal battery is still a whole because the fluorine-containing polymer material is arranged outside to package the internal battery, and the internal circuit is arranged in parallel, so that current can flow from the non-fragmentation part, and the internal battery still has power generation capability. Meanwhile, the fluorine-containing polymer material has excellent corrosion resistance, weather resistance and ultraviolet resistance, and the photovoltaic module 13 is prevented from being corroded by seawater and influenced by external temperature and ultraviolet rays.

Alternatively, referring to fig. 3, it is shown that the surface of the floating block 112 is provided with a plurality of grooves 112a and a plurality of ribs 112b.

In the embodiment of the invention, the groove 112a is used for routing and heat dissipation of the photovoltaic module 13, and heat generated on the back side of the photovoltaic module 13 is carried away when seawater and air flow through the groove 112 a. The floating block 112 is fixedly connected with the photovoltaic module 13 through the convex strips 112b.

Alternatively, referring to fig. 5, it is shown that a fixing plate 113 for supporting the support frame 12 is provided at the junction of the floating plate 111 and the floating block 112.

In the embodiment of the present invention, the supporting frame 12 surrounds the outer portion of the floating block 112 through the support of the fixing plate 113.

Alternatively, referring to fig. 4, it is shown that the outer wall of the support frame 12 is provided with several lugs 121 for hinging the floating photovoltaic module units 1 to each other.

In the embodiment of the invention, the supporting frame 12 is connected with the floating photovoltaic module units 1 through the hinges between the bumps 121 to form the flexible floating photovoltaic module array 3.

Optionally, the floating body 11 is of a hollow structure or an internal filling structure, and the filling material is a lightweight foam material.

In the embodiment of the invention, the floating body 11 with a hollow structure or the floating body 11 with an internal filling structure can be adopted according to actual needs, the photovoltaic module 13 is fixed on the floating body 11, when encountering stormy waves, the floating body 11 bears the loads of the stormy waves and the like, and the photovoltaic module 13 does not directly bear the loads. Damage to the photovoltaic module 13 is largely avoided.

Preferably, the guard 31 has a circular ring shape.

In the embodiment of the invention, the protection device 31 is in a circular ring shape, the flexible floating photovoltaic module array 3 is fixed in the circular ring of the protection device 31 through the connecting cable 32, the outer wall of the circular ring structure has no edges and corners and is smooth, and the flexible floating photovoltaic module array is prevented from being impacted by other floating objects on the sea surface to the greatest extent. The circular ring shape is only an embodiment, and is not to be construed as a limitation on the shape of the guard 31, and the guard 31 may also have a polygonal structure such as a square, a pentagon, and a hexagon.

The working principle is as follows: the photovoltaic module 13 is fixed on the surface of a floating block 112 of the floating body 11, and a support frame 12 is arranged on the periphery of the floating block 112 to form a floating photovoltaic module unit 1 capable of floating on the sea surface, wherein the support frame 12 is made of steel, and the floating body 11 is made of plastic; a plurality of floating photovoltaic module units 1 are hinged to form a flexible floating photovoltaic module array 3, and the flexible floating photovoltaic module array 3 is fixedly connected with the seabed through a seabed fixing device 2. The photovoltaic module 13 floats on the water surface through the support of the floating body 11, the floating photovoltaic module arrays 3 are formed by hinging the floating photovoltaic module units 1 through the support frame 12, the freedom degree between the floating photovoltaic module units 1 is reserved, and the floating photovoltaic module arrays 3 are integrally flexible to adapt to the fluctuation of the sea surface and move along with the wave motion of the sea surface.

The embodiments in the present specification are all described in a progressive manner, and each embodiment focuses on differences from other embodiments, and portions that are the same and similar between the embodiments may be referred to each other.

As is readily imaginable to the person skilled in the art: any combination of the above embodiments is possible, and thus any combination between the above embodiments is an embodiment of the present invention, but this specification is not necessarily detailed herein for reasons of space limitation.

In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the invention and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.

Those skilled in the art will appreciate that the modules in the devices in an embodiment may be adaptively changed and arranged in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.

While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or terminal apparatus that comprises the element.

The offshore floating photovoltaic system provided by the invention is described in detail, and the principle and the implementation mode of the invention are explained by applying specific examples, and the description of the examples is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. An offshore floating photovoltaic system, the system comprising: a plurality of floating photovoltaic module units (1) and a seabed fixing device (2),

the floating photovoltaic module unit (1) comprises:

the lower part of the floating body (11) is provided with a floating plate (111), the upper part of the floating body is provided with a plurality of floating blocks (112) with slopes, the floating blocks (112) are oppositely arranged left and right, and the slope tops are positioned in the middle of the floating body (11);

the supporting frame (12) is positioned above the floating plates (111) and surrounds the side edges of the floating plates (111);

the photovoltaic module (13) is fixedly connected with the surface of the floating plate (111);

the photovoltaic component (13) is fixed on the surface of the floating body (11), and the outside of the floating body (11) is enclosed by the supporting frame (12) to form a floating photovoltaic module unit (1); the floating photovoltaic module units (1) are connected to form a flexible floating photovoltaic module array (3) matched with sea surface fluctuation, and the flexible floating photovoltaic module array (3) is fixedly connected with a seabed through the seabed fixing device (2).

2. The device according to claim 1, characterized in that the seabed mooring (2) comprises: the flexible floating photovoltaic module array comprises a connecting device (21) and a plurality of anchor blocks (22) fixed on the seabed, wherein the flexible floating photovoltaic module array (3) is in anchoring connection with the anchor blocks (22) through the connecting device (21).

3. The system according to claim 1, characterized in that the flexible floating photovoltaic module array (3) is provided with a guard (31) at its periphery, which guard is fixedly connected to the flexible floating photovoltaic module array (3) by means of a connecting cable (32).

4. A system according to claim 3, characterised in that the guard (31) is fixedly connected to the seabed by means of the seabed-fixed installation (2).

5. The system according to claim 1, characterized in that the photovoltaic module (13) is encapsulated with a fluoropolymer material.

6. The system of claim 1, wherein the surface of the float (112) is provided with a plurality of grooves (112 a) and a plurality of ribs (112 b).

7. The system according to claim 1, characterized in that the connection of the floating plate (111) and the floating block (112) is provided with a fixed plate (113) for supporting the support frame (12).

8. The system according to claim 1, characterized in that the outer wall of the support frame (12) is provided with a number of lugs (121) for hinging between floating photovoltaic module units (1).

9. The device as claimed in claim 1, characterized in that the floating body (11) is of a hollow or internally filled structure, the filling of which is of a lightweight foamed material.

10. The device according to claim 1, characterized in that said guard (31) is annular.