A marine fixed photovoltaic power generation structure

Abstract

This invention relates to the field of offshore new energy power generation technology, and discloses an offshore fixed photovoltaic power generation structure, including: a photovoltaic array, a truss-type photovoltaic support structure, and a steel pipe pile wing plate barrel foundation structure; the photovoltaic panels are laid on the truss-type photovoltaic support structure, which is located above the steel pipe pile wing plate barrel foundation structure, and the steel pipe pile wing plate barrel foundation structure provides load-bearing capacity for the photovoltaic panels and the truss-type photovoltaic support structure. The photovoltaic panels of this structure adopt a horizontal wave-like design, greatly reducing environmental load and improving the stress on the foundation structure. The steel pipe pile wing plate barrel foundation structure balances upward and downward load-bearing capacity, with the wing plates providing horizontal load-bearing capacity. Adapted to the described wave-like photovoltaic panel structure, it can integrate photovoltaic power generation and wind power generation to achieve multi-energy complementarity. It can also provide empirical evidence for research on key technologies of offshore fixed photovoltaic systems and the formulation of industry standards, promoting cost reduction, efficiency improvement, and large-scale development of the offshore photovoltaic industry.

Description

Technical Field

[0001] This invention relates to the field of offshore new energy power generation technology, specifically to a fixed offshore photovoltaic power generation structure using steel pipe pile wing plate barrel foundation, which is particularly suitable for "wind and solar co-generation" combined power generation systems in typhoon-prone sea areas. Background Technology

[0002] With the growing global demand for clean energy, photovoltaic (PV) power generation is increasingly attracting attention as a sustainable energy solution. Compared to onshore PV, offshore PV has significant advantages, including longer sunshine hours, less shading of modules, better water surface cooling, less land occupation, and convenient power consumption. Its power generation is typically 5-10% higher than onshore PV. In particular, constructing PV systems within existing offshore wind farm areas can achieve intensive utilization of marine resources, forming a combined wind and solar power generation model.

[0003] However, offshore fixed photovoltaic structures face the challenges of a complex and harsh near-shore service environment: the structure must withstand extreme wind, wave, and current loads caused by typhoons, high salt spray corrosion, marine organism attachment, and foundation stability issues caused by complex seabed soil. Currently, there are no design standards specifically for offshore photovoltaic structures, and designs often refer to the specifications for onshore photovoltaic and offshore wind power, resulting in redundant safety factor values, bulky structures, and poor economic efficiency. Traditional equal-diameter piles require very thick walls or deep penetration into the mud to withstand huge bending moments, resulting in large material consumption and difficult construction. Traditional photovoltaic panels are unidirectionally tilted towards the sun, and the structure bears a large load under extreme wind loads such as typhoons, resulting in high steel consumption and costs to ensure structural safety and reliability. Summary of the Invention

[0004] In view of this, the present invention provides a marine fixed photovoltaic power generation structure that is structurally stable, economical, and particularly suitable for typhoon areas and thick silt geology. It can adapt to extreme marine environments and is structurally efficient and economically reasonable.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows: This invention provides a fixed offshore photovoltaic power generation structure, comprising: a photovoltaic array, a truss-type photovoltaic support structure, and a steel pipe pile wing plate barrel foundation structure; the photovoltaic array is rigidly connected to the truss-type photovoltaic support structure (2), the truss-type photovoltaic support structure is rigidly connected to the steel pipe pile wing plate barrel foundation structure, the photovoltaic array is placed on the truss-type photovoltaic support structure and arranged in a horizontal wave pattern, the truss-type photovoltaic support structure is adapted to provide support and stability for the photovoltaic array, the steel pipe pile wing plate barrel foundation structure is inserted into the seabed, and the steel pipe pile wing plate barrel foundation structure is adapted to provide upward pull, downward pressure and horizontal bearing capacity for the truss-type photovoltaic support structure.

[0006] It boasts the following advantages: By integrating the spatial truss-type support with the segmented variable-diameter steel pipe pile foundation through innovative design, it achieves an optimal balance between structural safety and economy. The structure effectively disperses complex upper loads through a high-rigidity spatial grid, and employs a "thinner top, thicker bottom" variable-diameter pile foundation strategy. This ensures excellent bending resistance in key areas below the mudline while significantly reducing the amount of material used in the upper pile body and the impact of wave forces, thus perfectly adapting to the stringent requirements of harsh near-shore environments such as typhoons and thick silt. The photovoltaic panels are arranged in a 5° horizontal wave shape, greatly reducing the structural forces exerted on the structure by extreme wind loads such as typhoons. This changes the foundation stress model from a downward compression failure mode to an upward pull failure mode. Furthermore, the innovative use of suction buckets nested around the piles utilizes the negative pressure adsorption capacity of the shallow suction buckets to effectively handle both upward and downward pile-soil failure modes, ensuring structural safety while significantly reducing the design and economic costs of the foundation structure. Simultaneously, the innovative welding of side wing plates to the outside of the suction buckets significantly enhances the structure's horizontal bearing capacity.

[0007] According to some embodiments of the present invention, the offshore fixed photovoltaic power generation structure includes a photovoltaic array, a truss photovoltaic support structure, and a steel pipe pile wing plate barrel foundation structure.

[0008] According to some embodiments of the present invention, the photovoltaic array is rigidly connected to the truss-type photovoltaic support structure and laid on top of it in a horizontal wave-like arrangement at a set tilt angle.

[0009] According to some embodiments of the present invention, the truss-type photovoltaic support structure serves as the core support, and its bottom is rigidly connected to the steel pipe pile wing plate barrel foundation structure, reliably transferring the upper load to the foundation. The support structure further includes an upper chord space frame, an intermediate space frame, and a lower chord space frame.

[0010] According to some embodiments of the present invention, the upper chord frame is composed of upper chord rods and upper chord connectors, and is connected in a grid pattern through the upper chord connectors, preferably in an 8-row, 16-column horizontal wave-shaped grid layout, to provide a direct and stable mounting plane for the photovoltaic array.

[0011] According to some embodiments of the present invention, the intermediate space frame includes diagonal web members, upper chord connectors and lower chord connectors. The diagonal web members are connected in an "X" shaped grid form through the upper chord connectors and the lower chord connectors, forming an 8-row, 16-column grid, thereby tightly connecting the upper chord space frame and the lower chord space frame into a high-strength integral spatial structure.

[0012] According to some embodiments of the present invention, the lower chord space frame includes a lower chord member, a lower chord connector, and a pile head connector. The lower chord members are connected in a grid form through the lower chord connector to form an 8-row, 16-column grid. The pile head connectors at its four ends are used to fix the structure to the steel pipe pile wing plate barrel foundation.

[0013] According to some embodiments of the present invention, the steel pipe pile wing-plate barrel foundation structure is inserted into the seabed, providing the final bearing capacity for the entire superstructure. The pile foundation adopts a segmented design, including upper piles, intermediate variable cross-section piles, lower piles, suction barrels, and wing plates. The first three are connected end-to-end, the suction barrel is nested within the lower pile body and inserted into the seabed, and the wing plates are arranged circumferentially at 90° on the side of the suction barrel. The upper piles have a smaller diameter to optimize load and material usage; the intermediate variable cross-section piles achieve a smooth transition in pile diameter from bottom to top; the lower piles have a larger diameter to provide strong foundation bearing capacity and bending resistance; and the suction barrel is embedded in the surface seabed to provide vertical pull-out bearing capacity and bending bearing capacity. Attached Figure Description

[0014] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a side view of a fixed offshore photovoltaic power generation structure provided in some embodiments of the present invention; Figure 2 This is a schematic diagram of the planar structure of a fixed offshore photovoltaic power generation structure provided in some embodiments of the present invention; Figure 3 This is a schematic diagram of the upper chord grid structure of a fixed offshore photovoltaic power generation structure provided in some embodiments of the present invention; Figure 4 This is a schematic diagram of the intermediate grid structure of a fixed offshore photovoltaic power generation structure provided in some embodiments of the present invention; Figure 5 This is a schematic diagram of the lower chord grid structure of a fixed offshore photovoltaic power generation structure provided in some embodiments of the present invention; Figure 6 This is a schematic diagram of the photovoltaic panel structure of a fixed offshore photovoltaic power generation structure provided in some embodiments of the present invention; Figure 7 This is a schematic diagram of the pile-wing plate barrel structure of a fixed offshore photovoltaic power generation structure provided in some embodiments of the present invention; Explanation of reference numerals in the attached figures: 1. Photovoltaic array; 2. Truss-type photovoltaic support structure; 3. Steel pipe pile wing plate barrel foundation structure; 11. Photovoltaic panel; 21. Upper chord space frame; 22. Intermediate space frame; 23. Lower chord space frame; 211. Upper chord member; 212. Upper chord connector; 221. Diagonal web member; 222. Lower chord connector; 223. Pile head connector; 231. Lower chord member; 31. Upper pile; 32. Intermediate variable cross-section pile; 33. Lower pile; 34. Suction barrel; 35. Wing plate. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0019] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0020] Reference Figure 1 and Figure 2As shown, this invention provides a fixed offshore photovoltaic power generation structure, comprising: a photovoltaic array, a truss-type photovoltaic support structure, and a steel pipe pile-wing-plate barrel foundation structure. The photovoltaic array is fixedly installed above the truss-type photovoltaic support structure, arranged along its long side in a north-south direction to maximize the reception of solar radiation. The bottom of the entire truss-type photovoltaic support structure is rigidly connected to the steel pipe pile-wing-plate barrel foundation structure, reliably transferring all loads to the seabed foundation through the pile-barrel foundation.

[0021] Reference Figure 6 As shown, the photovoltaic array is assembled from multiple standard photovoltaic panels using specialized connecting components. These panels are spliced ​​together by connectors at their edges to form a large-scale power generation unit. The photovoltaic panels are tilted at a 5° horizontal wave shape, which greatly reduces the structural forces exerted on the structure by extreme wind loads such as typhoons. This changes the stress model of the foundation under extreme wind loads, transforming it from a downward pressure failure mode to an upward pull failure mode. Furthermore, the innovative use of suction buckets nested around the piles utilizes the negative pressure adsorption capacity of the shallow suction buckets to effectively handle both upward and downward pile-soil failure modes. This significantly reduces the design and economic costs of the foundation structure, while also facilitating the natural sliding off of rainwater and sea spray, keeping the panel surface clean.

[0022] Reference Figure 3 , 4 As shown in Figure 5, it can be understood that in this invention, the truss-type photovoltaic support structure is a three-dimensional spatial truss, consisting of an upper chord space frame, a middle space frame, and a lower chord space frame, forming a high-rigidity whole. The upper chord space frame is composed of multiple upper chord members connected by upper chord connectors, forming a horizontal, wave-like grid platform. In a preferred embodiment, this grid adopts an 8-row, 16-column arrangement, with grid nodes providing evenly distributed support points for the photovoltaic panels. The lower chord space frame is located at the bottom of the structure, and its construction echoes that of the upper chord space frame, also consisting of lower chord members connected by lower chord connectors to form an 8-row, 16-column grid layout. Specially reinforced pile head connectors are provided at the four corner points of the lower chord space frame. These connectors typically take the form of flanges with stiffening ribs or pre-welded pile head sections, used to achieve a firm connection with the steel pipe piles below. The middle space frame is a key component connecting the upper and lower chord space frames, composed of a large number of cross-arranged diagonal web members. The two ends of these diagonal web members are connected to the nodes of the upper and lower chord grids via upper and lower chord connectors, respectively, forming a stable X-shaped grid structure within the entire support. This design can efficiently convert complex loads such as wind loads and wave forces into axial forces in the members and smoothly transfer them to the foundation, exhibiting excellent mechanical properties.

[0023] Reference Figure 7As shown, the steel pipe pile wing-plate barrel foundation structure is a core innovative design for harsh marine environments. Four steel pipe piles are arranged in a rectangular pattern, with an east-west span of approximately 19.319 meters and a north-south span of approximately 36 meters. Each steel pipe pile employs a three-section variable diameter design, one of the key innovations of this invention. The lower pile section has a larger diameter of 1.4 meters and a wall thickness of 20.4 millimeters, extending below the seabed mudline for the first 2 meters. This large-diameter design aims to provide strong lateral soil restraint and bending moment resistance, a crucial measure to resist the enormous overturning moment caused by typhoons. The upper pile section has a smaller diameter of 0.7 meters and a wall thickness of 13.4 millimeters, located above the mudline and in the water. The smaller diameter effectively reduces the forces of waves and currents, while significantly saving steel consumption. Connecting the upper and lower pile segments is the intermediate variable cross-section pile segment, which serves as a conical transition section. Its taper is carefully designed to ensure a smooth change in the pile cross-section, avoiding stress concentration and ensuring that various internal forces can be smoothly transferred from the weaker bending-resistant upper pile segment to the stronger bending-resistant lower pile segment. Another key innovation of this invention is the 5° horizontal wave-shaped arrangement of the photovoltaic panels, which significantly reduces the structural forces exerted on the structure by extreme wind loads such as typhoons. This changes the foundation's stress model from a downward-pressure failure mode to an upward-pull-out failure mode. Furthermore, the innovative use of a suction bucket nested around the lower pile utilizes the shallow suction bucket's negative pressure adsorption capacity for soil. The suction bucket, with a diameter of 5 meters, a depth of 3 meters, and a plate thickness of 20 millimeters, effectively handles both upward-pull-out and downward-pressure pile-soil failure modes. The wing plate, with a width of 1.5 meters, a depth of 3 meters, and a plate thickness of 20 millimeters, significantly enhances the foundation's horizontal bearing capacity, ensuring structural safety while greatly reducing the design and economic costs of the foundation structure.

[0024] During construction, the pile sections, truss members, and connectors are first prefabricated in the factory. On-site, a piling vessel is used to drive the assembly of the lower pile section and the intermediate variable-section pile section into the seabed to the design elevation. Then, the upper pile section and transition section are butt-welded on-site. Finally, the large truss-type photovoltaic support structure, pre-assembled on land, is hoisted as a whole, ensuring the pile head connectors at the four corners of the lower chord are accurately fitted onto the tops of the four upper pile sections, and then finalized by welding. The photovoltaic array installation can then commence.

[0025] Through this innovative design, this embodiment successfully provides an offshore photovoltaic solution capable of adapting to the harsh environment of typhoon-prone sea areas. Its robust variable-diameter pile foundation and efficient truss support system not only ensure structural safety and improve the foundation stress pattern, but also offer good economic benefits. It provides a reliable technical path for the coordinated development of offshore photovoltaic and wind farms, and also creates favorable conditions for the future integration of wave energy power generation and other diversified energy utilization.

[0026] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A fixed offshore photovoltaic power generation structure, characterized by, include: A photovoltaic array (1), a truss-type photovoltaic support structure (2), and a steel pipe pile wing plate barrel foundation structure (3); the photovoltaic array (1) is rigidly connected to the truss-type photovoltaic support structure (2), the truss-type photovoltaic support structure (2) is rigidly connected to the steel pipe pile wing plate barrel foundation structure (3), the photovoltaic array (1) is placed on the truss-type photovoltaic support structure (2) and arranged in a horizontal wave pattern, the truss-type photovoltaic support structure (2) is adapted to provide support and stability for the photovoltaic array (1), the steel pipe pile wing plate barrel foundation structure (3) is inserted into the seabed, and the steel pipe pile wing plate barrel foundation structure (3) is adapted to provide load-bearing capacity for the truss-type photovoltaic support structure (2).

2. The offshore fixed photovoltaic power structure according to claim 1, characterized in that, The photovoltaic array (1) includes a photovoltaic panel (11) and a connecting part (12); the four ends of the photovoltaic panel (11) are connected to the connecting part (12), and the connecting part (12) is connected to four photovoltaic panels (11) respectively. The photovoltaic panels (11) are arranged at a 5° angle to the sea level, and the adjacent photovoltaic panel columns are arranged in a horizontal wave pattern, that is, the angle between the photovoltaic panels and the sea level changes alternately.

3. The offshore fixed photovoltaic power structure of claim 1, wherein, The truss-type photovoltaic support structure (2) includes an upper chord frame (21), an intermediate frame (22) and a lower chord frame (23); the hinge points of the members of the upper chord frame (21) are connected to the intermediate frame (22) through upper chord connectors (212), and the hinge points of the members of the lower chord frame (23) are connected to the intermediate frame (22) through lower chord connectors (222).

4. The offshore, fixed photovoltaic power structure of claim 3, wherein, The upper chord frame (21) includes an upper chord rod (211) and an upper chord connector (212). The upper chord rod (211) is connected in a grid form through the upper chord connector (212) to form an 8-row, 16-column grid. In order to support the horizontal wave-shaped photovoltaic panel, the upper chord frame (21) is connected in a horizontal wave-shaped undulating form.

5. The offshore fixed photovoltaic power structure according to claim 3, characterized in that, The intermediate grid (21) includes diagonal web members (221), upper chord connectors (212), lower chord connectors (222), and pile head connectors (223). The diagonal web members (221) are connected in an "X" grid form through the upper chord connectors (212) and the lower chord connectors (222) to form an 8-row, 16-column "X" grid.

6. The offshore fixed photovoltaic power structure of claim 3, wherein, The lower chord space frame (23) includes a lower chord (231), a lower chord connector (222), and a pile head connector (232). The upper chord (231) is connected in a grid form through the lower chord connector (222) to form an 8-row, 16-column grid. The pile head connector (232) is located at the four ends of the lower chord space frame (23) that connect to the steel pipe pile wing plate barrel foundation structure (3).

7. The offshore fixed photovoltaic power structure of claim 1, wherein, The steel pipe pile foundation structure (3) includes an upper pile (31), an intermediate variable cross-section pile (32), a lower pile (33), a suction bucket (34), and a wing plate (35); the steel pipe pile foundation structure (3) is connected end to end and connected to the truss photovoltaic support structure (2) through the pile head connector (232); the suction bucket (34) is fitted on the lower pile (33), and the lid of the suction bucket (34) is placed at the mud surface position; the wing plate (35) is rigidly connected to the side wall of the suction bucket (34) at 90°.

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