A floating photovoltaic structure and an offshore power generation system

Abstract

The present invention discloses a floating photovoltaic structure and an offshore power generation system. The floating photovoltaic structure includes a floating platform; a photovoltaic array assembly disposed on the floating platform, the photovoltaic array assembly including a plurality of photovoltaic panels, trusses, tension cables and connecting cables, the number of photovoltaic panels and trusses being both plural, the bottom of each photovoltaic panel being connected to a truss, the truss being provided with a first connecting portion connected to the tension cable and a second connecting portion connected to the connecting cable; wherein, a plurality of photovoltaic panels form a photovoltaic array of M rows and N columns, and assuming the vertical distance between the first connecting portion of each truss and its corresponding photovoltaic panel is the first vertical distance, then along the row direction of the photovoltaic array, a plurality of vertical distances first increase and then decrease, the tension cables are sequentially connected to the first connecting portions of each truss in the row direction of the photovoltaic array, the connecting cables are sequentially connected to the second connecting portions of each truss in the column direction of the photovoltaic array, M>0, N>0.

Description

Technical Field

[0001] The present invention relates to the technical field of floating photovoltaic technology, and particularly to a floating photovoltaic structure and an offshore power generation system. Background Art

[0002] Offshore floating photovoltaics are generally far from the coast and have a high wind speed. In the southeastern coastal waters, they are also prone to typhoons. The existing photovoltaic structures have weak wind resistance and can only withstand typhoons directly, resulting in the frequent overturning or scattering of the photovoltaic structures, reducing the reliability of offshore floating photovoltaics.

[0003] Therefore, how to improve the reliability of offshore floating photovoltaics is a technical problem that those skilled in the art need to solve currently. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a floating photovoltaic structure to improve the reliability of offshore floating photovoltaics.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A floating photovoltaic structure, comprising:

[0007] A floating platform;

[0008] A photovoltaic array assembly arranged on the floating platform. The photovoltaic array assembly includes photovoltaic panels, trusses, tension cables, and connecting cables. The number of both the photovoltaic panels and the trusses is multiple. The bottom of each photovoltaic panel is connected to one truss. The truss is provided with a first connection part connected to the tension cable and a second connection part connected to the connecting cable;

[0009] Wherein, multiple photovoltaic panels form a photovoltaic array of M rows and N columns. Assuming the vertical distance between the first connection part of each truss and its corresponding photovoltaic panel is the first vertical distance, then along the row direction of the photovoltaic array, multiple such vertical distances first increase and then decrease. The tension cable sequentially connects the first connection parts of each truss in the row direction of the photovoltaic array, and the connecting cable sequentially connects the second connection parts of each truss in the column direction of the photovoltaic array, where M > 0 and N > 0.

[0010] Optionally, in the above floating photovoltaic structure, the photovoltaic panel is a square structure, and the truss includes a first support rod, a second support rod, a third support rod, and a fourth support rod;

[0011] Wherein, the first ends of the first support rod, the second support rod, the third support rod, and the fourth support rod are respectively connected to the four right-angle portions of the photovoltaic panel, and the second ends of the first support rod, the second support rod, the third support rod, and the fourth support rod are connected to form the first connection portion.

[0012] Optionally, in the above floating photovoltaic structure, the floating platform includes a plurality of modular semi-submersible floating platforms, and adjacent semi-submersible floating platforms are connected by elastic connectors.

[0013] Optionally, in the above floating photovoltaic structure, the elastic connector includes a telescopic deformation member and / or a rope.

[0014] Optionally, in the above floating photovoltaic structure, the telescopic deformation member is a hydraulic rod or a spring rod.

[0015] Optionally, in the above floating photovoltaic structure, the elastic connector is connected to the semi-submersible platform by a spherical hinge.

[0016] Optionally, in the above floating photovoltaic structure, the semi-submersible floating platform includes a modular platform body and floating columns passing through the center of each platform body, and a support structure for installing the photovoltaic array assembly is provided on the floating columns.

[0017] Optionally, in the above floating photovoltaic structure, the support structure includes vertical rods provided on the floating columns and connecting rods connecting the vertical rods;

[0018] Wherein, the vertical rods are arranged at intervals of one or more of the floating columns, the plurality of connecting rods are arranged in parallel, and the photovoltaic array assembly is installed on the connecting rods.

[0019] Optionally, in the above floating photovoltaic structure, the bottom of the floating column is connected to a mooring cable, and the mooring cable is connected to an anchoring foundation.

[0020] An offshore power generation system includes the floating photovoltaic structure as described above.

[0021] When the floating photovoltaic structure provided by the present invention is used, a plurality of photovoltaic panels are arranged into a photovoltaic array in the form of M rows and N columns. Since a truss is connected to the bottom of each photovoltaic panel, the tension cable is sequentially connected to the first connection portion of each truss in the row direction of the photovoltaic array, and the vertical distance between the first connection portion of each truss and its corresponding photovoltaic panel is a first vertical distance. Along the row direction of the photovoltaic array, a plurality of vertical distances first increase and then decrease. Therefore, the tension cable of each row forms an inverted catenary structure or an inverted triangle structure, and then the second connection portion of each truss is sequentially connected in the column direction of the photovoltaic array through the connecting cable, so that the truss, the tension cable and the connecting cable form a whole, provide an upward support force for the photovoltaic panel, form a photovoltaic array assembly, and then set the photovoltaic array assembly on the floating platform; since the floating photovoltaic structure provided by the present invention connects each photovoltaic panel through the tension cable and the connecting cable, therefore, when a typhoon comes, based on the tension change of the tension cable, the photovoltaic array assembly can rotate as a whole to unload the wind load, thereby reducing the phenomenon of the photovoltaic array assembly being blown away and overturned, and improving the reliability of the offshore floating photovoltaic. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic structural diagram of a photovoltaic array assembly provided by an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of a row structure of a photovoltaic array provided by an embodiment of the present invention;

[0025] Figure 3 A schematic diagram of a tension cable with an inverted catenary structure provided by an embodiment of the present invention;

[0026] Figure 4 A schematic diagram of a tension cable with an inverted triangular structure provided by an embodiment of the present invention;

[0027] Figure 5 A schematic structural diagram of a floating platform provided by an embodiment of the present invention;

[0028] Figure 6 A schematic diagram of a floating photovoltaic structure provided by an embodiment of the present invention;

[0029] Figure 7Schematic structural diagram of an elastic connector provided by an embodiment of the present invention;

[0030] Figure 8 Schematic structural diagram of another elastic connector provided by an embodiment of the present invention;

[0031] Figure 9 Top - view structural diagram of a floating platform provided by an embodiment of the present invention;

[0032] Figure 10 Top - view structural diagram of another floating platform provided by an embodiment of the present invention.

[0033] Among them, 100 is the floating platform, 101 is the platform body, 102 is the floating column, 200 is the photovoltaic array assembly, 201 is the photovoltaic panel, 202 is the truss, 203 is the tension cable, 204 is the connecting cable, 300 is the elastic connector, 301 is the telescopic deformation member, 302 is the rope, 400 is the support structure, 401 is the vertical rod, 402 is the connecting rod, 500 is the mooring cable, 600 is the anchoring foundation, R is the row direction of the photovoltaic array, and C is the column direction of the photovoltaic array. Detailed implementation manners

[0034] In view of this, the purpose of the present invention is to provide a floating photovoltaic structure to improve the reliability of offshore floating photovoltaics.

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] As Figures 1 to 10 shown, an embodiment of the present invention discloses a floating photovoltaic structure, including a floating platform 100 and a photovoltaic array assembly 200.

[0037] Among them, the photovoltaic array assembly 200 is arranged on the floating platform 100. The photovoltaic array assembly 200 includes photovoltaic panels 201, trusses 202, tension cables 203 and connecting cables 204. The numbers of the photovoltaic panels 201 and the trusses 202 are both multiple. The bottom of each photovoltaic panel 201 is connected to a truss 202. The truss 202 is provided with a first connecting part connected to the tension cable 203 and a second connecting part connected to the connecting cable 204. The multiple photovoltaic panels 201 form a photovoltaic array in M rows and N columns. It is set that the vertical distance between the first connecting part of each truss 202 and its corresponding photovoltaic panel 201 is the first vertical distance. Then, along the row direction R of the photovoltaic array, the multiple vertical distances first increase and then decrease. The tension cables 203 are sequentially connected to the first connecting parts of the respective trusses 202 in the row direction R of the photovoltaic array. The connecting cables 204 are sequentially connected to the second connecting parts of the respective trusses 202 in the column direction C of the photovoltaic array. M>0, N>0.

[0038] When using the floating photovoltaic structure provided by the present invention, multiple photovoltaic panels 201 are arranged in the form of M rows and N columns to form a photovoltaic array. Since the bottom of each photovoltaic panel 201 is connected to a truss 202, the tension cables 203 are sequentially connected to the first connecting parts of the respective trusses 202 in the row direction R of the photovoltaic array. And the vertical distance between the first connecting part of each truss 202 and its corresponding photovoltaic panel 201 is the first vertical distance. Along the row direction R of the photovoltaic array, the multiple vertical distances first increase and then decrease. Therefore, each row of the tension cables 203 forms an inverted triangle structure as shown in Figure 3 or an inverted catenary structure as shown in Figure 4 . Then, the connecting cables 204 are sequentially connected to the second connecting parts of the respective trusses 202 in the column direction C of the photovoltaic array, so that the trusses 202, the tension cables 203 and the connecting cables 204 form an integral body, providing an upward supporting force for the photovoltaic panels 201 to form the photovoltaic array assembly 200. Then, the photovoltaic array assembly 200 is arranged on the floating platform 100. Since the floating photovoltaic structure provided by the present invention connects the respective photovoltaic panels 201 through the tension cables 203 and the connecting cables 204, therefore, when a typhoon comes, based on the tension change of the tension cables 203, the whole photovoltaic array assembly 200 can rotate to unload the wind load, reducing the phenomena that the photovoltaic array assembly 200 is scattered and overturned, and improving the reliability of the offshore floating photovoltaic.

[0039] It should be understood that the present invention does not limit the specific types of the above-mentioned photovoltaic panel 201 and truss 202, as long as the types that can meet the use requirements belong to the protection scope of the present invention; optionally, in a specific embodiment of the present invention, the photovoltaic panel 201 is a square structure, and the truss 202 includes a first support rod, a second support rod, a third support rod and a fourth support rod, and the first end of the first support rod, the first end of the second support rod, the first end of the third support rod and the first end of the fourth support rod are respectively connected to the four right-angled parts of the photovoltaic panel 201, and the second end of the first support rod, the second end of the second support rod, the second end of the third support rod and the second end of the fourth support rod The ends are connected to form a first connection portion, so that the first support rod, the second support rod, the third support rod and the fourth support rod are tiltedly arranged at the bottom of the photovoltaic panel 201, so that the second end of the first support rod, the second end of the second support rod, the second end of the third support rod and the second end of the fourth support rod are converged at the bottom of the photovoltaic panel 201 and connected to form a first connection portion, so as to facilitate the first connection portions of each truss 202 to be connected in sequence in the row direction R of the photovoltaic array through the tension cable 203, and the typhoon wind load is unloaded by the tension change of the tension cable 203, thereby reducing the phenomenon of the photovoltaic array assembly 200 being blown away and overturned, and improving the reliability of offshore floating photovoltaic.

[0040] In addition, the above-mentioned first connection part and the second connection part can be at the same position or at different positions on the truss 202. As long as the setting method can meet the connection requirements, it belongs to the protection scope of the present invention; optionally, the first connection part and the second connection part provided in the embodiment of the present invention are at the same position.

[0041] Furthermore, the above-mentioned floating platform 100 includes a plurality of modular semi-submersible floating platforms, and adjacent semi-submersible floating platforms are connected by elastic connectors 300, so that the floating platform 100 can adapt to the ups and downs of waves, and the floating platform 100 can adapt to the deformation of the photovoltaic array assembly 200. At the same time, the discreteness or collision between adjacent semi-submersible floating platforms is reduced, thereby improving the stability of the floating platform 100.

[0042] It should be understood that the present invention does not specifically limit the number of modular semi-submersible floating platforms in the above-mentioned floating platform 100. In practical applications, it can be expanded horizontally and vertically according to actual needs; Figure 9 As shown, in a specific embodiment of the present invention, the number of modular semi-submersible floating platforms is 15, forming an array of three rows and five columns; Figure 10 As shown, in another specific embodiment of the present invention, the number of modular semi-submersible floating platforms is 45, forming an array of five rows and nine columns.

[0043] In addition, the above-mentioned elastic connecting member 300 can be of types such as a telescopic deformation member 301, a rope 302, or a combination of the two. As long as it is a part type that can meet the usage requirements, it belongs to the protection scope of the present invention; optionally, as Figure 7 and Figure 8 shown, the elastic connecting member 300 provided in the embodiment of the present invention includes a telescopic deformation member 301 and a rope 302.

[0044] Moreover, the above-mentioned elastic connecting member 300 can connect two adjacent semi-submersible floating platforms, or can connect two adjacent semi-submersible floating platforms through an additionally provided connecting member. As long as it is a connection method that can meet the usage requirements, it belongs to the protection scope of the present invention.

[0045] Specifically, in a specific embodiment of the present invention, the elastic connecting member 300 further includes a first connecting member connected to the first semi-submersible floating platform and a second connecting member connected to the second semi-submersible floating platform. A first rope, a second rope, and a telescopic deformation member 301 are arranged between the first connecting member and the second connecting member. The telescopic deformation member 301 is located between the first rope and the second rope to play a role in buffering collisions through the telescopic deformation member 301, and to improve the connection strength between adjacent semi-submersible floating platforms through the first rope and the second rope.

[0046] The above-mentioned telescopic deformation member 301 can be a part type such as a hydraulic rod or a spring rod. As long as it can be telescopic and play a damping role in the separation and collision of two adjacent semi-submersible floating platforms, it belongs to the protection scope of the present invention; similarly, the above-mentioned rope 302 can be a part type such as a high molecular polyester fiber cable or a linen rope. As long as it is a rope type that can meet the usage requirements, it belongs to the protection scope of the present invention. Optionally, the telescopic deformation member 301 provided in the embodiment of the present invention is a spring rod, and the rope 302 is a high molecular polyester fiber cable.

[0047] Furthermore, the above-mentioned elastic connecting member 300 is connected to the semi-submersible platform through a ball joint, so that when the floating platform 100 is subjected to external forces such as typhoons, both ends of the elastic connecting member 300 can unload the wind load by rotating, reducing the fatigue damage or ultimate failure phenomenon of the elastic connecting member 300 caused by excessive external forces, and improving the stability and reliability of the floating platform 100.

[0048] The semi-submersible floating platform provided by the present invention includes a plurality of modular platform bodies 101 and floating columns 102 passing through the centers of each platform body 101. A support structure 400 for installing a photovoltaic array module 200 is provided on the floating columns 102 to support the photovoltaic array module 200 through the support structure 400 and form a modular semi-submersible floating platform. At the same time, based on the fact that the photovoltaic array module 200 can be expanded in the row and column directions of its array, the floating photovoltaic structure forms a modular structure and can be expanded horizontally and vertically according to the on-site construction conditions.

[0049] The above-mentioned support structure can be a structure type such as a support plate, a support rod or a support frame, etc. As long as it is a structure type that can meet the use requirements, it belongs to the protection scope of the present invention; optionally, the present invention provides a specific support structure 400.

[0050] The support structure 400 includes a vertical rod 401 provided on the floating column 102 and a connecting rod 402 connecting the vertical rod 401; wherein, the diameter of the vertical rod 401 is smaller than the diameter of the floating column 102, and the vertical rod 401 is arranged at intervals of one or more floating columns 102 to reduce the number of vertical rods 401 and reduce costs. A plurality of connecting rods 402 are arranged in parallel, and the photovoltaic array module 200 is installed on the connecting rod 402 to realize the support of the support structure 400 for the photovoltaic array module 200.

[0051] It should be understood that the number of floating columns 102 spaced between adjacent vertical rods 401 is not specifically limited. As long as it is an interval number that can meet the mechanical property requirements, it belongs to the protection scope of the present invention; optionally, as Figure 5 and Figure 6 shown, there are three floating columns 102 spaced between the two floating columns 102 provided with vertical rods 401 provided in the embodiment of the present invention, reducing the number of vertical rods 401 and reducing costs.

[0052] In addition, a mooring cable 500 is connected to the bottom of the floating column 102, and the mooring cable 500 is connected to an anchoring foundation 600. The anchoring foundation 600 is fixed on the seabed to fix the floating platform 100 at a preset position through the mooring cable 500 and the anchoring foundation 600.

[0053] In addition, the present invention also discloses an offshore power generation system, including the floating photovoltaic structure as described above, so it has all the technical effects of the above-mentioned floating photovoltaic structure, which will not be elaborated herein one by one.

[0054] In the description and claims of the present invention and the above-mentioned drawings, terms such as "first" and "second" are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may include steps or units not listed.

[0055] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A floating photovoltaic structure, characterized in that, Comprising: A floating platform; A photovoltaic array assembly disposed on the floating platform, the photovoltaic array assembly comprising a plurality of photovoltaic panels, trusses, tension cables and connecting cables. The number of the photovoltaic panels and the trusses are both plural. The bottom of each photovoltaic panel is connected to one truss. The truss is provided with a first connecting portion connected to the tension cable and a second connecting portion connected to the connecting cable; Wherein, a plurality of the photovoltaic panels form a photovoltaic array of M rows and N columns. The vertical distance between the first connecting portion of each truss and its corresponding photovoltaic panel is set as the first vertical distance. Then, along the row direction of the photovoltaic array, the plurality of the vertical distances first increase and then decrease. The tension cables are sequentially connected to the first connecting portions of each truss in the row direction of the photovoltaic array. The connecting cables are sequentially connected to the second connecting portions of each truss in the column direction of the photovoltaic array, where M>0 and N>0; The photovoltaic panel is of a square structure, and the truss comprises a first support rod, a second support rod, a third support rod and a fourth support rod; Wherein, the first ends of the first support rod, the second support rod, the third support rod and the fourth support rod are respectively connected to the four right-angle portions of the photovoltaic panel. The second ends of the first support rod, the second support rod, the third support rod and the fourth support rod are connected to form the first connecting portion.

2. The floating photovoltaic structure according to claim 1, wherein The floating platform comprises a plurality of modular semi-submersible floating platforms, and adjacent semi-submersible floating platforms are connected by elastic connecting members.

3. The floating photovoltaic structure according to claim 2, wherein The elastic connecting member comprises a telescopic deformation member and / or a rope.

4. The floating photovoltaic structure according to claim 3, wherein The telescopic deformation member is a hydraulic rod or a spring rod.

5. The floating photovoltaic structure according to claim 2, characterized in that The elastic connecting member is connected to the semi-submersible floating platform by a spherical hinge.

6. The floating photovoltaic structure according to claim 2, wherein The semi-submersible floating platform comprises a modular platform body and floating columns passing through the center of each platform body. A support structure for installing the photovoltaic array assembly is provided on the floating columns.

7. The floating photovoltaic structure according to claim 6, wherein, The support structure comprises vertical rods provided on the floating columns and connecting rods connecting the vertical rods; Wherein, the vertical rods are arranged with one or more floating columns in between. A plurality of the connecting rods are arranged in parallel, and the photovoltaic array assembly is installed on the connecting rods.

8. The floating photovoltaic structure according to claim 6, wherein, The bottom of the floating column is connected to a mooring cable, and the mooring cable is connected to an anchoring foundation.

9. An offshore power generation system, characterized in that, Comprising the floating photovoltaic structure according to any one of claims 1 to 8.

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