Triangular combined offshore floating photovoltaic system

Abstract

The present application provides a kind of triangular combined offshore floating photovoltaic system, comprising: at least one floating unit, each floating unit comprising: a plurality of floats, each float is configured as a triangular structure, and comprises a first vertex and two second vertices, the first vertex of the plurality of floats is connected to combine the floating unit into a polygonal structure, each float comprises: a plurality of pontoons, sequentially connected to form three edges of the triangular structure, wherein each pontoon is configured to be detachably connected with adjacent pontoons;And two groups of support rods are installed on the pontoon in parallel along the length direction of the pontoon;And a plurality of support parts are respectively provided on the support rods, configured to be substantially the same as the extension direction of the support rods;And a plurality of photovoltaic assemblies are provided on the support parts, suitable for collecting solar energy and converting into electrical energy for collection.

Description

TECHNICAL FIELD

[0001] At least one embodiment of the present application relates to the field of ocean engineering technology, and in particular to a triangular combined offshore floating photovoltaic system. BACKGROUND

[0002] The development of various clean energy sources such as water, wind, and light is an important way to achieve the double carbon goal. After years of development and practice, the related technologies of hydropower and wind power have become mature, but photovoltaic power generation has not been well developed for a long time due to problems such as development cost and the complexity of the marine environment. In recent years, with the continuous decline in the cost of photovoltaic components, a large number of successful cases of onshore photovoltaic and inland lake photovoltaic development practices have emerged.

[0003] However, offshore photovoltaic is different from onshore photovoltaic, and the wind, wave, and current environmental loads are more severe, and the wave load contributes more to the total load. Therefore, the platform providing buoyancy in the existing offshore floating photovoltaic system is a spaced floating cylinder structure, so that seawater can flow in or out between adjacent floating cylinders to avoid the increase in stress on the offshore floating photovoltaic system caused by seawater flow. In this structure, if the floating cylinder is damaged, the photovoltaic system unit with the floating cylinder structure or even the entire photovoltaic system needs to be shipped to land or a marine maintenance platform for replacement of the damaged floating cylinder, which affects the operation efficiency of the photovoltaic system and is difficult to maintain. SUMMARY

[0004] To solve the technical problems in the prior art, the present application provides an offshore floating photovoltaic system, which adopts a plurality of floating boxes connected with the supporting rods in a detachable manner, and each floating box can be replaced during the operation of the offshore floating photovoltaic system.

[0005] As an aspect of the present application, an offshore floating photovoltaic system is provided, which includes at least one floating unit and a plurality of photovoltaic components. Each of the floating units includes a plurality of floating bodies and a plurality of supporting parts. Each of the floating bodies is configured in a triangular structure and includes a first apex and two second apexes, the first apexes of the plurality of floating bodies are connected to combine the floating units into a polygonal structure, and each of the floating bodies includes a plurality of floating boxes and two groups of supporting rods. The plurality of floating boxes are connected in sequence to form three sides of the triangular structure, wherein each of the floating boxes is configured to be detachably connected with adjacent floating boxes. The two groups of supporting rods are installed on the floating boxes in parallel along the length direction of the floating boxes. The plurality of supporting parts are respectively arranged on the supporting rods and are configured to have the same extension direction as the supporting rods. The plurality of photovoltaic components are arranged on the supporting parts and are adapted to collect solar energy and convert it into electrical energy for collection.

[0006] According to an embodiment of the present application, each of the floating units further comprises a plurality of auxiliary units, each of which is disposed between the second vertices of adjacent floating bodies and is adapted to connect the second vertices of the adjacent floating bodies so that the floating units form a stable polygonal structure.

[0007] According to an embodiment of the present application, each of the floating units further comprises a plurality of auxiliary units, each of which is disposed between the second vertices of adjacent floating bodies and is adapted to connect the second vertices of the adjacent floating bodies so that the floating units form a stable polygonal structure.

[0008] According to an embodiment of the present application, each of the floating units further comprises a plurality of auxiliary units, each of which is disposed between the second vertices of adjacent floating bodies and is adapted to connect the second vertices of the adjacent floating bodies so that the floating units form a stable polygonal structure.

[0009] According to an embodiment of the present application, each of the floating units further comprises a plurality of auxiliary units, each of which is disposed between the second vertices of adjacent floating bodies and is adapted to connect the second vertices of the adjacent floating bodies so that the floating units form a stable polygonal structure.

[0010] According to an embodiment of the present application, each of the floating units further comprises a plurality of auxiliary units, each of which is disposed between the second vertices of adjacent floating bodies and is adapted to connect the second vertices of the adjacent floating bodies so that the floating units form a stable polygonal structure.

[0011] According to an embodiment of the present application, each of the floating units further comprises a plurality of auxiliary units, each of which is disposed between the second vertices of adjacent floating bodies and is adapted to connect the second vertices of the adjacent floating bodies so that the floating units form a stable polygonal structure.

[0012] According to an embodiment of the present application, each of the floating units further comprises a plurality of auxiliary units, each of which is disposed between the second vertices of adjacent floating bodies and is adapted to connect the second vertices of the adjacent floating bodies so that the floating units form a stable polygonal structure.

[0013] According to an embodiment of the present invention, each of the above-mentioned auxiliary units includes two lower beams and an upper beam. The two lower beams are arranged parallel to each other on the free ends of adjacent floats, and the upper beam is arranged parallel to the two lower beams above the two lower beams. The two ends of the upper beam intersect with the two adjacent upper chords respectively.

[0014] According to an embodiment of the present invention, the floating photovoltaic system further includes a plurality of connectors, each of which is constructed as a cuboid structure. The cuboid structure has a first protrusion and a second protrusion arranged parallel to each other on opposite sides. The gap formed between the first protrusion and the second protrusion is suitable for snapping the photovoltaic module. The second protrusion is provided with a mounting hole, which is suitable for fixing the photovoltaic module between the first protrusion and the second protrusion by bolts. The connectors are mounted on the tension cable by bolts, and each photovoltaic module is mounted on each floating unit by a plurality of the connectors.

[0015] According to the above embodiments of the present invention, the floating photovoltaic system allows the system to float and move on the water surface according to weather changes or the navigation needs of other maritime vessels, such as ships, without obstructing their navigation. Each floating unit comprises multiple floating bodies with a triangular structure formed by multiple buoys and support rods. Each buoy is detachably connected to the support rod, allowing for replacement of the buoys at sea without transporting the floating unit to a maintenance platform. This improves the operational efficiency of the floating photovoltaic system and reduces the difficulty of offshore maintenance. The floating units can be constructed, transported, and installed as a whole or in a modular fashion, and through multiple flexible combination and splicing methods, they are suitable for offshore photovoltaic projects of any size and installed capacity. Attached Figure Description

[0016] Figure 1 This is a front view of the connection of multiple floating units in an embodiment of the floating photovoltaic system of the present invention;

[0017] Figure 2 This is a front view of the floating unit in an embodiment of the present invention;

[0018] Figure 3 for Figure 2 The side view of the floating unit shown;

[0019] Figure 4 for Figure 2 A 3D view of the floating unit shown;

[0020] Figure 5 A cross-sectional view along the width of the floating body showing the connection between the pontoon and the fixed part and the truss structure;

[0021] Figure 6 A front view of a photovoltaic module connected with a cable-stayed cable according to an embodiment of the present application;

[0022] Figure 7 A side view of a photovoltaic module connected with a cable-stayed cable according to an embodiment of the present application; Figure 6

[0023] Figure 8 A side view of a photovoltaic module connected with a cable-stayed cable according to an embodiment of the present application; Figure 7

[0024] Figure 9 A perspective view of a truss structure of a floating unit according to an embodiment of the present application; Figure 2

[0025] Figure 10 A perspective view of a connection between adjacent floating units and auxiliary units according to an embodiment of the present application; and

[0026] Figure 11 A perspective view of a connection between adjacent floating units according to an embodiment of the present application.

[0027] BRIEF DESCRIPTION OF DRAWINGS

[0028] 1 - floating body;

[0029] 2 - support part;

[0030] 3 - photovoltaic module;

[0031] 4 - auxiliary unit;

[0032] 5 - connection part;

[0033] 6 - floating unit;

[0034] 7 - binding member;

[0035] 8 - anchor chain;

[0036] 9 - shackle;

[0037] 10 - fixing pin;

[0038] 11 - connection column;

[0039] 12 - connection rod;

[0040] 13 - truss structure;

[0041] 14 - cable-stayed cable;

[0042] 15 - top chord;

[0043] 16 - support column;

[0044] 17 - linking member;

[0045] ​​​18 - first protrusion;

[0046] 19 - second protrusion;

[0047] 20 - bolt;

[0048] 21 - diagonal rod;

[0049] 22 - side rod;

[0050] 23 - first vertex;

[0051] 24 - second vertex;

[0052] 25 - pontoon;

[0053] 26 - support rod;

[0054] 27 - fairlead;

[0055] 28 - mounting bracket;

[0056] 29 - chain;

[0057] 30 - lower beam;

[0058] 31 - upper beam;

[0059] 32 - backing plate;

[0060] 33 - filler;

[0061] 34 - housing. DETAILED DESCRIPTION

[0062] To make the objects, technical solutions, and advantages of the present application clearer, the following will further describe the present application with specific examples and with reference to the drawings. However, the present application can be implemented in different forms and should not be interpreted as being limited to the embodiments set forth herein. On the contrary, the embodiments are provided to make the disclosure thorough and complete, and to fully convey the scope of the present application to those skilled in the art. In the drawings, the sizes and relative sizes of layers and regions can be exaggerated for clarity, and the same reference numerals are used throughout to denote the same elements.

[0063] Hereinafter, embodiments of the present application will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present application. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to one skilled in the art that one or more embodiments can be practiced without these specific details. In addition, in the following description, descriptions of well-known structures and techniques have been omitted to avoid unnecessary obscuring the concept of the present application.

[0064] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the terms "comprises", "comprising", "includes", "including" and the like are specifically intended to be open-ended and to mean that other features, steps, operations, and / or components can be added.

[0065] All terms used herein including technical and scientific terms have the meanings commonly understood by one of ordinary skill in the art unless otherwise specified. It should be noted that the terms used herein are defined as having meanings that are consistent with the context of the specification in which they are used and should not be interpreted in an overly idealized or overly formal way.

[0066] To facilitate understanding of the technical solutions of the present application, the following technical terms are explained.

[0067] In the case of using expressions similar to "at least one of A, B, and C, etc.", it should be generally construed that the meaning is understood by one of ordinary skill in the art as it is commonly used in the field, for example, "a system having at least one of A, B, and C" should include but not be limited to a system having A alone, a system having B alone, a system having C alone, a system having both A and B, a system having both A and C, a system having both B and C, and / or a system having A, B, and C, etc. In the case of using expressions similar to "at least one of A, B, or C, etc.", it should be generally construed that the meaning is understood by one of ordinary skill in the art as it is commonly used in the field, for example, "a system having at least one of A, B, or C" should include but not be limited to a system having A alone, a system having B alone, a system having C alone, a system having both A and B, a system having both A and C, a system having both B and C, and / or a system having A, B, and C, etc.

[0068] Marine photovoltaic is different from land photovoltaic, and is subjected to more severe environmental loads such as wind, wave, and current, has strong randomness, and the wave load accounts for about 50% of the total load. The environmental load and the floating platform motion are coupled, and a more solid floating platform and mooring design are needed to withstand the severe environmental impact, which leads to a cost of marine photovoltaic system being 25%-30% higher than that of land photovoltaic.

[0069] Figure 1 A front view of a plurality of floating units connected for a marine floating photovoltaic system according to an embodiment of the present application, Figure 2 A front view of a floating unit according to an embodiment of the present application, Figure 3 A side view of the floating unit shown in Figure 2 A side view of the floating unit shown in Figure 4 A side view of the floating unit shown in Figure 2 A perspective view of the floating unit shown in

[0070] As one aspect of the present application, a triangular combined marine floating photovoltaic system is provided, as shown in Figure 1The offshore floating photovoltaic system comprises at least one floating unit and a plurality of photovoltaic modules. Figure 1 not shown, will be described later in detail Figures 5 to 7 with reference to the detailed description. As Figures 2-4 shown, each floating unit 6 comprises a plurality of floating bodies 1 and a plurality of supporting parts 2. Each floating body 1 is configured as a triangular structure and comprises one first vertex 23 and two second vertices 24, the first vertices 23 of the plurality of floating bodies 1 are connected to combine the floating unit 6 into a polygonal structure, each floating body 1 comprises a plurality of pontoons 25 and two groups of supporting rods 26. The plurality of pontoons 25 are sequentially connected to form three edges of the triangular structure, wherein each pontoon 25 is configured to be detachably connected with the adjacent pontoon 25. The two groups of supporting rods 26 are detachably installed on the pontoons 25 in parallel along the length direction of the pontoons 25. The plurality of supporting parts 2 are respectively arranged on the supporting rods 26 and are configured to be in the same extension direction as the supporting rods 26. The plurality of photovoltaic modules 3 are arranged on the supporting parts 2 and are suitable for collecting solar energy and converting the solar energy into electric energy.

[0071] According to the offshore floating photovoltaic system of the above-mentioned embodiments of the present application, by taking the floating unit 6 as the supporting structure of each photovoltaic module 3, the photovoltaic system can float and move on the water surface according to the weather changes or the needs of the navigation of other marine moving bodies such as ships, so as not to hinder the navigation of other marine moving bodies. Each floating unit 6 comprises a plurality of floating bodies 1 in triangular structure formed by a plurality of pontoons 25 and supporting rods 26, each pontoon is detachably connected with the supporting rod, and the replacement of the pontoon can be completed at sea, without the need to transport the floating unit to a maintenance platform, thereby improving the operation efficiency of the offshore floating photovoltaic system and reducing the difficulty of offshore maintenance.

[0072] When the wave height of the sea wave exceeds a certain value, the large-scale floating structure may appear an adverse working condition of sagging and hogging. According to the offshore floating photovoltaic system of the embodiments of the present application, by arranging the plurality of floating bodies 1 as triangular structures, the relative displacement between the floating bodies 1 is constrained, the rotational constraint force is released, and the load effect of the wave hogging and sagging is weakened. The polygonal floating unit 6 can adapt to the large deformation caused by the movement of the plurality of triangular floating bodies 1 under the action of wave load, and ensure the stability of the structure of the polygonal floating unit 6 as a whole. The floating unit 6 can be modularly constructed, towed and installed as a whole, and through a plurality of flexible combination and splicing modes, it is suitable for offshore photovoltaic projects of any size of sea area and any installed capacity.

[0073] According to the embodiments of the present application, the floating unit 6 is a regular polygonal structure, for example, it can be a regular hexagon, a regular decagon, etc.

[0074] In an illustrative embodiment, as Figures 1 to 4As shown, each floating unit is configured as a regular hexagonal structure, including 3 triangular structure floating bodies, each floating body being a triangular structure formed by 24 floating boxes connected in sequence and two sets of support rods, first vertices of the 3 floating bodies being connected at the center of the regular hexagonal structure to combine the floating unit 6 into a regular hexagonal structure.

[0075] In another illustrative embodiment, each floating unit is configured as a regular octagonal structure, including 4 triangular structure floating bodies, each floating body being a triangular structure formed by 15 floating boxes connected in sequence and two sets of support rods, first vertices of the 4 floating bodies being connected at the center of the regular hexagonal structure to combine the floating unit 6 into a regular octagonal structure.

[0076] Figure 5 A cross-sectional view of the floating box in the width direction of the floating body connected with the fixed part and the truss structure.

[0077] According to an embodiment of the present application, as shown in Figure 5 The floating box 25 includes a shell 34 and a filler 33 filled in the shell 34.

[0078] In an illustrative embodiment, the shell is made of high-density polyethylene (HDPE) material, and the filler is polystyrene (EPS) foam.

[0079] According to an embodiment of the present application, as shown in Figure 5 Each floating body 1 further includes a plurality of fixing frames 28 and a plurality of shackles 29. The plurality of fixing frames 28 respectively extend downward from the two sets of support rods 26, and the plurality of shackles 29 are detachably connected with lower ends of the fixing frames 28, and the floating box 25 is limited in a space formed by the support rods 26, the fixing frames 28 and the shackles 29.

[0080] According to an embodiment of the present application, as shown in Figures 2-5 A cross bar is further installed between the two sets of support rods 26 and arranged perpendicularly to the support rods 26, so that the two sets of support rods can be stably installed on the floating box 25.

[0081] In an illustrative embodiment, the support rods 26 and the cross bar are connected by welding.

[0082] In an illustrative embodiment, as shown in Figure 4 The fixing frames respectively extend downward from nodes where the cross bar and the support rods are connected.

[0083] According to an embodiment of the present application, as shown in Figure 5 Each floating body further includes a pad 32 detachably arranged between the floating box 25 and the support rod 26 to disperse the buoyancy of the floating box 25 to the pad 32.

[0084] In an illustrative embodiment, the pad 32 is a wooden pad.

[0085] In an exemplary embodiment, a piece of deck board is arranged on at least two adjacent pontoons.

[0086] According to the embodiment of the present application, by arranging the detachable chain 29, the pontoon 25 and / or the deck board 32 can be replaced at sea, thereby reducing the maintenance cost.

[0087] In an exemplary embodiment, as shown in Figure 2 each floating body includes eight sequentially arranged pontoons 25, and two support rods arranged in parallel along the length direction of the pontoons, thereby providing the floating force for the offshore floating photovoltaic system.

[0088] In another exemplary embodiment, each floating body includes twelve sequentially arranged pontoons and two groups of support rods 26 arranged in parallel along the length direction of the pontoons.

[0089] According to the embodiment of the present application, the pontoon can be in a cylindrical structure or a cubic structure.

[0090] In an exemplary embodiment, the pontoon is in a cylindrical structure, which can further provide the ice load resistance for the floating platform, thereby improving the structural safety.

[0091] According to the embodiment of the present application, according to the stress performance and the floating force requirement, the width of each pontoon can be 1 m-2 m, and the height can be 0.5 m-1 m, which is determined according to the self-weight of the entire floating unit, and the floating force provided by the floating body 1 needs to be greater than 30%-50% of the maximum downward load.

[0092] According to the embodiment of the present application, each floating unit 6 further includes a plurality of auxiliary units 4 arranged between the second vertices 24 of adjacent floating bodies, which are suitable for connecting the second vertices 24 of the adjacent floating bodies, so that the floating unit 6 forms a stable polygonal structure.

[0093] According to the embodiment of the present application, each auxiliary unit includes two lower beams 30 and an upper beam 31. The two lower beams 30 are arranged in parallel on the free ends of the support rods of the adjacent floating bodies 1. The upper beam 31 is arranged above the two lower beams 30 in parallel with the two lower beams 30, and the two ends of the upper beam 31 are respectively intersected with two adjacent upper chords (which will be described in detail later). Figure 9 The upper beam 31 and the lower beam 30 are further provided with a pair of load-bearing rods arranged therebetween, which are used to limit the relative position of the upper beam and the lower beam.

[0094] According to the embodiment of the present application, each polygonal floating unit 6 can be modularly constructed, towed and installed as a whole. Through the flexible combination and splicing of a plurality of floating units, the offshore photovoltaic project of any size of sea area and any installed capacity can be applied.

[0095] Figure 6 a front view of a photovoltaic module connected with a cable-stayed cable according to an embodiment of the present application, Figure 7 a front view of a photovoltaic module connected with a cable-stayed cable according to an embodiment of the present application, Figure 6 a side view of a photovoltaic module connected with a cable-stayed cable according to an embodiment of the present application, Figure 8 a side view of a photovoltaic module connected with a cable-stayed cable according to an embodiment of the present application, Figure 7 a partial enlarged view of a side view of a photovoltaic module connected with a cable-stayed cable according to an embodiment of the present application.

[0096] According to an embodiment of the present application, as shown in Figures 2 to 5 the support part 2 comprises a truss structure 13 and a plurality of cable-stayed cables 14. The truss structure 13 is arranged on the support pole 26, and each cable-stayed cable 14 is arranged between two adjacent truss structures 13. The plurality of cable-stayed cables 14 are arranged in parallel and spaced apart along the extension direction of the truss structure 13, as shown in Figures 6 to 8 at least one photovoltaic module 3 is suspended between two adjacent cable-stayed cables 14.

[0097] According to an embodiment of the present application, in order to reduce the impact of seawater directly on the photovoltaic module 3 and avoid damage to the photovoltaic module 3 caused by seawater, the height of the truss structure 13 is greater than the wave height after deducting the sag displacement of the cable-stayed cable 14.

[0098] According to an embodiment of the present application, the truss structure 13 is a steel truss structure made of a corrosion-resistant steel pipe, thereby ensuring that the truss structure can be used for a long time in a seawater corrosion environment.

[0099] Figure 9 a perspective view of a floating body connected with a truss structure according to an embodiment of the present application. Figure 2

[0100] According to an embodiment of the present application, as shown in Figures 2 to 5 and Figure 9 the truss structure 13 comprises an upper chord 15 and a plurality of support columns 16. The upper chord 15 is arranged above the floating body and is configured to extend in a direction parallel to the extension direction of the floating body 1. The plurality of support columns 16 are arranged between the floating body 1 and the upper chord 15 and are adapted to limit the position of the upper chord relative to the floating body 1.

[0101] According to an embodiment of the present application, as shown in Figures 2 to 5 and Figure 9 ​As shown, the truss structure 13 is arranged above the floating body 1, and a plurality of truss structures 13 form a support surface above the floating body 1 for supporting photovoltaic modules, the two groups of support rods 26 of the floating body 1 serve as the lower chords of the truss structure 13, the spacing of the upper chords 15 is determined by the arrangement spacing requirement of the cable-stayed cable 14, and a pair of side rods 22 or a pair of diagonal rods 21 are arranged at the nodes of each upper chord 15 as support columns 16 connected to the floating body 1 to provide longitudinal and lateral support, so as to keep the upper chord stable relative to the support rod 26. The cable-stayed cable 14 is arranged at the node of the upper chord 15 of the truss structure 13, and the nodes of the corresponding upper chords 15 of the truss structures 13 above the adjacent two floating bodies 1 are connected, and the photovoltaic modules 3 can be hung between the adjacent two cable-stayed cables 14, and the arrangement spacing of the cable-stayed cable 14 is adapted to the size of the photovoltaic module 3.

[0102] According to the embodiment of the present application, the upper chord 15, the floating body 1 and the plurality of support columns 16 are connected by welding, riveting or bolting.

[0103] In an illustrative embodiment, as shown in the drawings, Figure 4 The support column 16 includes a pair of side rods 22 and a pair of diagonal rods 21. A plurality of pairs of side rods 22 are arranged at intervals between the nodes of the upper chord and the two groups of support rods 26, and one end of each pair of diagonal rods 21 is arranged at the node of the support rod 26 connected to the side rod 22, and the other end is arranged at the node of the upper chord between the adjacent pair of side rods 22.

[0104] According to the embodiment of the present application, as shown in the drawings, Figures 6 to 8 The offshore floating photovoltaic system further comprises a plurality of linkers 17, each linker 17 is configured as a cuboid structure, and opposite sides of the cuboid structure are respectively provided with a first protruding portion 18 and a second protruding portion 19 arranged in parallel at intervals, and a gap formed between the first protruding portion 18 and the second protruding portion 19 is adapted to clamp the photovoltaic module, and a mounting hole is arranged on the second protruding portion 19, and the mounting hole is adapted to fix the photovoltaic module between the first protruding portion 18 and the second protruding portion 19 by bolts, and the linker 17 is installed on the cable-stayed cable 14 by the bolt 20, and each photovoltaic module is installed on each floating unit by a plurality of linkers.

[0105] Further, the linker 17 is installed on the cable-stayed cable 14 by a U-shaped bolt.

[0106] In an illustrative embodiment, the spacing between the two support rods 26 is about 1.5 m, the distance between the upper chord 15 and the support rod 26 is about 2.5 m, the length of the support rod is 15 m ~ 30 m, and the spacing between the side rod and the diagonal rod is determined according to the arrangement spacing requirement of the cable-stayed cable, and the diameter of the upper chord of the truss structure and the diameter of the support rod are about 60 mm ~ 200 mm, and the specific size is determined by structural strength checking.

[0107] Figure 10 a perspective view of the connection between adjacent floating units and auxiliary units, Figure 11 a perspective view of the connection between adjacent floating units.

[0108] According to the embodiments of the present application, as shown in Figures 1-4 , Figure 10 and Figure 11 , the floating unit further comprises connection parts 5 arranged at the apexes of the floating bodies 1 and at the two ends of each auxiliary unit 4. The offshore floating photovoltaic system further comprises binding members 7 adapted to horizontally pass through the connection parts 5 of the plurality of floating bodies, bind the apexes of the adjacent floating bodies 1, and bind the auxiliary units 4 between the adjacent second apexes 24 of the floating unit.

[0109] According to the embodiments of the present application, as shown in Figure 4 and 10 , the two ends of the auxiliary unit 4 are respectively provided with connection parts 5, and the three apexes of the triangular floating body 1 are respectively provided with connection parts 5. The binding members pass through the first apexes 23 of the adjacent floating bodies 1 to connect the first apexes of the floating bodies 1 at the center of the polygonal floating unit, and pass through the connection parts of the ends of the auxiliary units and the connection parts at the second apexes of the floating bodies to connect the auxiliary units 4 between the second apexes 24 of the adjacent floating bodies 1.

[0110] According to the embodiments of the present application, as shown in Figure 10 and Figure 11 , the connection part 5 comprises a connection column 11 and a plurality of connection rods 12. One end of the connection column 11 is arranged on the support part 2, the support rod 26 or the auxiliary unit 4, and the other end is mounted on the connection column 11 and adapted to be mounted upright on the apex of the floating body or the two ends of the auxiliary unit 4. Among them, a fairlead 27 adapted for the binding member 7 to pass through is formed between the connection column 11 and the plurality of connection rods 12. The binding member 7 passes through the fairlead 27 to connect the auxiliary units 4 between the adjacent second apexes 24 of the floating unit 1 and connect the plurality of floating bodies 1 and / or moor the offshore floating photovoltaic system.

[0111] According to the embodiments of the present application, the plurality of polygonal structure floating units are flexibly connected by arranging the connection parts 2 and the binding members 7, so that there can be relative rotation and a small amount of displacement between adjacent floating units, and the degrees of freedom between the polygonal floating units are released. Furthermore, under the fluctuation of sea waves, the offshore floating photovoltaic system can be driven to fluctuate with the sea waves, reducing the connection stress between adjacent floating units, saving the cost of structural materials, and improving the safety of the offshore floating photovoltaic system.

[0112] According to the embodiment of the present application, by setting the binding member 7 and the connecting part 5, the flexible connection between the floating units and the convenient offshore construction can be realized.

[0113] According to the embodiment of the present application, the binding member 7 comprises any one of the hinged anchor chain, the steel cable, the fiber rope, etc.

[0114] In an exemplary embodiment, as shown in Figure 10 the connecting part 5 set at the two ends of the auxiliary unit 4 comprises the connecting column 11 and the four connecting rods 12, one end of the connecting rod 12 is installed on the upper beam 31 or the lower beam 30 of the auxiliary unit 4, and the other end is installed on the connecting column, and the guide hole 27 is formed between the connecting column and the connecting rod.

[0115] In an exemplary embodiment, as shown in Figure 11 the connecting part 5 set at the top of the floating body 1 comprises the connecting column 11 and the plurality of connecting rods 12, one end of the connecting rod 12 is installed on the upper chord 15 or the support rod 26, and the other end is installed on the connecting column, and the guide hole 27 is formed between the connecting column and the connecting rod. The connecting rod 12 is also set between the adjacent upper chords of the floating body 1 as a reinforcing structure.

[0116] According to the embodiment of the present application, as shown in Figure 10 the connecting part 5 at the two ends of the auxiliary unit 4, the top of the connecting column 11 is in an arc structure, the other end of the connecting rod 12 connected with the upper beam 31 among the plurality of connecting rods is set on the arc structure, and the other end of the connecting rod 12 connected with the lower beam 30 is set on the wall surface of the connecting column. As shown in Figure 11 the connecting part 5 at the top of the floating body, the top of the connecting column 11 is in an arc structure, the other end of the connecting rod 12 connected with the upper chord among the plurality of connecting rods is set on the arc structure, and the other end of the connecting rod 12 connected with the support frame 26 is set on the wall surface of the connecting column.

[0117] According to the embodiment of the present application, the wall surfaces of the adjacent connecting columns 11 are tangent.

[0118] According to the embodiment of the present application, the part of the connecting column 11 for binding is wrapped with a layer of wear-resistant rubber.

[0119] In an exemplary embodiment, as shown in Figure 11 the binding member 7 is the hinged anchor chain, which comprises the anchor chain 8, the shackle 9, and the fixing pin 10. During the connection, the anchor chain 8 is sequentially inserted through the guide holes 27 on the connecting parts 5 of the floating units, then the anchor chain 8 is connected end to end through the shackle 9, and finally the shackle and the anchor chain 8 are fixedly connected by the fixing pin 10.

[0120] In an exemplary embodiment, the fixing pin 10 can also be replaced by the bolt.

[0121] According to an embodiment of the present application, the offshore floating photovoltaic system further comprises an anchoring foundation and a mooring rope. The anchoring foundation is fixed to the seabed to provide an anchoring point for the whole offshore photovoltaic floating system, and the mooring rope is connected to the connecting part at one end and to the anchoring foundation at the other end, so as to realize the position constraint of the offshore floating photovoltaic system and ensure that the position of the offshore photovoltaic floating system will not change greatly under the action of sea wind and waves.

[0122] According to an embodiment of the present application, the anchoring foundation can be a structure such as an offshore wind turbine foundation with a fixed foundation or a fixed offshore drilling system foundation, which provides an anchoring point for the offshore floating photovoltaic system on the basis of ensuring the stability and safety of its own structure.

[0123] In an illustrative embodiment, an offshore floating photovoltaic system is provided, as shown in Figure 1 The floating unit 6 comprises 13 floating bodies in a triangular structure. Two groups of support rods 26 and 24 floating boxes combine the floating bodies into a triangular structure. The support part is arranged on the support rod 26 for supporting the photovoltaic assembly 3. The support part 2 comprises a truss structure 13 arranged on the floating body 1 and a plurality of cable-stayed cables 14 arranged between adjacent truss structures 13. The support rod serves as the lower chord of the truss structure, the spacing between the upper chord 15 and the support rod is 2.5 m, the spacing between the two support rods 26 is 1.5 m, and the length is 25 m. The spacing of the upper chord 15 is determined according to the size of the photovoltaic assembly, which is 2.746 m. A pair of diagonal bars 21 or a pair of side bars 22 are arranged at each upper chord node to provide vertical support and lateral stability. The size of all members of the entire truss structure is determined after structural strength checking by finite element software.

[0124] The spacing between the upper beam 31 and the lower beam 30 of the auxiliary unit 4 is 2.5 m, the spacing between the two lower beams 30 is 1.5 m, and the length is 25 m. The size of all members of the auxiliary unit 4 is determined after structural strength checking by finite element software.

[0125] The floating box is a cuboid structure with a width of 1.5 m and a height of about 0.8 m. The length of the 8 floating boxes is 22.5 m, and there are a total of 24 floating boxes, which can provide a buoyancy of about 162 t. The total weight of the entire floating unit and the photovoltaic assembly 3 is 60 t, and the buoyancy provided by the floating body 1 is greater than 30%~50% of the pressure load. A wooden pad 32 is arranged between the floating box 25 and the support rod 26 to avoid stress concentration problems on the floating box. The size of the fixed frame 28 and the chain 29 is determined after structural strength checking.

[0126] The cable-stayed cable 14 is arranged at the node of the truss upper chord, the spacing between the two adjacent cables is 2.746 m, and a single floating unit suspends 468 photovoltaic panels.

[0127] like Figure 1 As shown, connecting parts 5 are respectively provided at the apex of the floating body 1 and at both ends of the auxiliary unit. The connecting parts 5 and the binding members 7, which are hinged anchor chains, connect the first apex of the triangular floating body at the center of the floating unit, and connect the auxiliary unit 4 between the second apexes of adjacent floating bodies of the floating unit 6. The hinged anchor chains connect adjacent floating units 6 to form a large-scale floating photovoltaic system comprising 13 floating units 6. The connecting parts include connecting posts 11 and multiple connecting rods 12. The connecting rods 12 vertically connect the connecting posts 11 to the free end of the floating body 1, forming a cable guide hole 27 between the connecting posts 11 and the connecting rods 12. The cable guide hole 27 allows the hinged anchor chain to pass through and can also serve as a cable guide hole for mooring lines. When connecting adjacent floating platforms, the anchor chains are first passed through the adjacent cable guide holes of each floating platform in sequence, and then the anchor chains are connected end to end using shackles. The connecting parts 5 and binding members 7 are all designed for a tensile force of 100t.

[0128] A truss structure 13, consisting of floating bodies and upper chords arranged in six directions, serves as the main support structure and can cope with environmental loads from all directions. Tensioned cables 14 are used between the truss structures to support the photovoltaic modules, effectively saving steel consumption and costs.

[0129] In summary, the embodiments of the present invention provide a floating photovoltaic system for the sea, comprising multiple floating units with polygonal structures. The floating units are arranged in a symmetrical regular polygonal pattern. A truss structure composed of a float and an upper chord is arranged on the diagonal of each floating unit as the main support structure for each floating unit. This arrangement can cope with environmental loads from multiple directions. The photovoltaic modules are supported by tensioned cables between the truss structures, which effectively saves steel consumption and cost. Binding members are set between adjacent floating units to constrain the relative displacement between adjacent floating units, release rotational constraint forces, and reduce the load effects of arching and sagging in waves, thus achieving a balance between structural strength and cost.

[0130] It should be noted that implementations not illustrated or described in the accompanying drawings or the main text of the specification are all forms known to those skilled in the art and are not described in detail. Furthermore, the definitions of the various elements and methods described above are not limited to the specific structures, shapes, or methods mentioned in the embodiments, and those skilled in the art can easily modify or substitute them.

[0131] It should be noted that the directional terms mentioned in the embodiments, such as "upper", "lower", "front", "back", "left", "right", etc., are only the directions of the drawings and are not intended to limit the protection scope of the present application. Throughout the drawings, the same elements are denoted by the same or similar reference numerals. When it is possible to cause confusion in the understanding of the present application, the conventional structures or configurations will be omitted, and the shapes and sizes of the components in the drawings do not reflect the true size and ratio, but only illustrate the content of the embodiments of the present application.

[0132] Unless otherwise known as the opposite meaning, the numerical parameters in the specification and the attached claims are approximate values, which can be changed according to the desired characteristics obtained by the content of the present application. In particular, all the numbers used in the specification and claims to express the content of the composition, reaction conditions, etc. should be understood as being modified by the term "about" in all cases. Generally, it is expressed to mean that it includes a variation of ±10% in some embodiments, ±5% in some embodiments, ±1% in some embodiments, ±0.5% in some embodiments from the specified number.

[0133] The ordinal numbers used in the specification and claims, such as "first", "second", "third", etc., are used to modify the corresponding elements, which do not mean that the elements have any ordinal number, nor represent the order of one element and another element, or the order of the manufacturing method. The use of these ordinal numbers is only used to clearly distinguish one element having a certain name from another element having the same name.

[0134] In addition, unless the steps are specifically described or must occur in sequence, the order of the above steps is not limited to the above list, and can be changed or rearranged according to the desired design. And the above embodiments can be mixed and used with each other or with other embodiments based on design and reliability considerations, that is, the technical features in different embodiments can be freely combined to form more embodiments.

[0135] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present application. It should be understood that the above is only a specific embodiment of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A triangular combined offshore floating photovoltaic system, characterized by, The offshore floating photovoltaic system comprises: at least one floating unit, each of the floating units comprising: a plurality of floating bodies, each of the floating bodies being configured as a triangular structure and comprising a first vertex and two second vertices, the first vertices of the plurality of floating bodies being connected to combine the floating unit into a polygonal structure, each of the floating bodies comprising: a plurality of floating boxes connected in sequence to form three edges of the triangular structure, wherein each of the floating boxes is configured to be detachably connected with adjacent floating boxes; two groups of support rods installed on the floating boxes in parallel along the length direction of the floating boxes; a plurality of supporting parts respectively arranged on the support rods and configured to be substantially the same as the extension direction of the support rods; a plurality of auxiliary units respectively arranged between the second vertices of adjacent floating bodies and adapted to connect the second vertices of adjacent floating bodies to form a stable polygonal structure of the floating unit; a plurality of connecting parts respectively arranged at the vertices of the floating bodies and at both ends of each of the auxiliary units; a binding member adapted to horizontally pass through the connecting parts of the plurality of floating bodies, bind the vertices of adjacent floating bodies, and bind the auxiliary units between the second vertices of adjacent floating bodies of the floating unit; a plurality of photovoltaic assemblies arranged on the supporting parts and adapted to collect solar energy and convert the solar energy into electric energy for collection; the connecting part comprises: a connecting column; a plurality of connecting rods, one end of the connecting column being respectively arranged on the supporting part, the support rod or the auxiliary unit, and the other end being installed on the connecting column and adapted to vertically install the connecting column on the vertex of the floating body or both ends of the auxiliary unit; wherein the connecting column and the plurality of connecting rods form a fairlead hole adapted for the binding member to pass through, and the binding member passes through the fairlead hole to connect the auxiliary units between the second vertices of adjacent floating bodies of the floating unit and connect the plurality of floating bodies and / or moor the offshore floating photovoltaic system.

2. The offshore floating photovoltaic system of claim 1, wherein, each of the floating bodies further comprises: a plurality of fixing frames respectively extending downward from the two groups of support rods; and a plurality of shackles detachably connected with the lower ends of the fixing frames, the floating boxes being limited in a space formed by the support rods, the fixing frames and the shackles.

3. The offshore floating photovoltaic system of claim 2, wherein, each of the floating bodies comprises: a backing plate detachably arranged between the floating box and the support rod to distribute the buoyancy of the floating box to the backing plate.

4. The offshore floating photovoltaic system according to any of claims 1-3, characterized in that, the supporting part comprises: a truss structure arranged on the floating body; and a plurality of cable-stayed cables, each of the cable-stayed cables being arranged between two adjacent truss structures; wherein the plurality of cable-stayed cables are arranged in parallel and at intervals along the extension direction of the truss structure, and at least one photovoltaic assembly is adapted to be suspended between two adjacent cable-stayed cables.

5. The offshore floating photovoltaic system of claim 4, wherein, the truss structure comprises: a top chord arranged above the floating body and configured to extend in a direction parallel to the extension direction of the floating body; and a plurality of support columns arranged between the floating body and the top chord and adapted to limit the position of the top chord relative to the floating body.

6. The offshore floating photovoltaic system of claim 5, wherein, each of the auxiliary units comprises: Two lower beams are arranged in parallel on the free ends of the adjacent floating bodies; An upper beam is arranged above the two lower beams in parallel, and the two ends of the upper beam are respectively intersected with the two adjacent upper chords.

7. The offshore floating photovoltaic system of claim 6, wherein, Further comprising: A plurality of linkers, each of which is configured as a cuboid structure, and opposite sides of the cuboid structure are respectively arranged in parallel and spaced apart with a first protruding part and a second protruding part, and a gap formed between the first protruding part and the second protruding part is suitable for clamping the photovoltaic module, and a mounting hole is arranged on the second protruding part, and the mounting hole is suitable for fixing the photovoltaic module between the first protruding part and the second protruding part through a bolt, and the linkers are installed on the cable-stayed cable through a bolt, and each photovoltaic module is installed on each floating unit through a plurality of linkers.

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