Offshore photovoltaic structure relying on offshore wind power single pile foundation and construction method thereof

Abstract

The invention discloses an offshore photovoltaic structure relying on an offshore wind power single pile foundation and a construction method of the offshore photovoltaic structure, and relates to the technical field of offshore photovoltaic combined with offshore wind power. The offshore photovoltaic structure comprises the wind power single pile foundation and a photovoltaic module, and the wind power single pile foundation comprises a pile foundation, a tower drum and a fan; the system further comprises a top frame, a diagonal bracing frame and an operation and maintenance channel, the top frame circularly extends outwards with the pile foundation as the center, the diagonal bracing frame is located below the top frame and connected with the pile foundation and the top frame, the photovoltaic assembly is installed on the upper surface of the top frame, and the operation and maintenance channel is arranged in the radial direction of the upper surface of the top frame. The offshore wind power single pile foundation is combined with offshore photovoltaic power, mutual complementation can be achieved under different time and weather conditions, 24-hour continuous power supply is provided, and the stability and diversification of energy supply are improved.

Description

Technical Field

[0001] This invention relates to the field of offshore photovoltaic technology combined with offshore wind power, specifically to an offshore photovoltaic structure based on an offshore wind power monopile foundation and its construction method. Background Technology

[0002] With the increasing global demand for renewable energy, a single energy source is insufficient to meet large-scale and stable energy supply needs. Traditionally, photovoltaic (PV) power plants are primarily onshore, but these require large land areas, resulting in significant land resource waste. In contrast, while deploying PV systems in inland waters has become an important direction, limitations due to shipping lanes and limited inland water surface area have led to a shift towards offshore PV power plants. The combination of offshore PV and offshore wind power can complement each other under different time and weather conditions, providing 24-hour continuous power and increasing the stability and diversification of energy supply. Coastal regions and island nations can effectively reduce their dependence on land resources and alleviate land resource pressure by developing energy in marine spaces. Furthermore, offshore PV and offshore wind power offer significant environmental advantages, producing no greenhouse gases or harmful pollutants, thus contributing to carbon emission reduction and climate change mitigation.

[0003] Currently, various offshore wind and solar co-development schemes have emerged both domestically and internationally, but they are all still in the conceptual design stage and lack practicality. This invention aims to maximize the utilization of the monopile foundation structure of offshore wind farms to design and construct offshore photovoltaic systems, thereby promoting the comprehensive utilization of marine energy. Summary of the Invention

[0004] The purpose of this invention is to provide an offshore photovoltaic structure based on an offshore wind power monopile foundation and its construction method, so as to realize the simultaneous development of offshore photovoltaic and offshore wind power and improve the efficiency of comprehensive utilization of marine energy.

[0005] The present invention is achieved through the following technical solution.

[0006] This invention provides an offshore photovoltaic structure based on an offshore wind turbine monopile foundation, including a wind turbine monopile foundation and photovoltaic modules. The wind turbine monopile foundation includes a pile foundation, a tower, and a wind turbine, as well as a top frame, a bracing frame, and an operation and maintenance channel. The top frame extends outward in a circular pattern with the pile foundation as the center. The bracing frame is located below the top frame and connects the pile foundation and the top frame. The photovoltaic modules are installed on the upper surface of the top frame, and the operation and maintenance channel is arranged radially along the upper surface of the top frame.

[0007] Furthermore, the pile foundation is fixed to the seabed bedrock.

[0008] Furthermore, the pile foundation is made of high-strength, corrosion-resistant materials.

[0009] Furthermore, the top frame extends outward in a circular shape and is composed of multiple radial beams and circumferential beams. The radial beams extend outward along the pile foundation, and the circumferential beams are arranged in a circumferential direction to form a grid structure.

[0010] Furthermore, the top frame is made of a lightweight, high-strength material.

[0011] Furthermore, the top frame is provided with a ring beam that encircles the pile foundation. The ring beam is a segmented structure, with adjacent segments connected by bolts and washers. The pile foundation is provided with a circumferential clamp, which consists of a clamping groove and a support rod. The ring beam is clamped in the clamping groove, and one end of the support rod is welded to the pile foundation, while the other end is fixed to the bottom of the clamping groove.

[0012] Furthermore, the diagonal bracing frame is composed of multiple diagonal bracing rods, each of which is connected at one end to the pile foundation and at the other end to the top frame, arranged radially.

[0013] Furthermore, the diagonal bracing frame is made of corrosion-resistant material.

[0014] Furthermore, the photovoltaic module uses monocrystalline silicon or polycrystalline silicon photovoltaic panels.

[0015] This invention also provides a construction method for the above-mentioned offshore photovoltaic structure based on an offshore wind turbine monopile foundation, comprising the following steps:

[0016] Step 1: Install wind turbine monopile foundations;

[0017] Step 2: Install the diagonal bracing frame on the wind turbine monopile foundation;

[0018] Step 3: Install the top frame;

[0019] Step 4: Install the photovoltaic modules on the top frame;

[0020] Step 5: Install the operation and maintenance channel.

[0021] The beneficial effects of this invention are:

[0022] (1) This invention combines offshore wind power monopile foundation with offshore photovoltaic, which can complement each other under different times and weather conditions, providing 24-hour continuous power supply and increasing the stability and diversification of energy supply.

[0023] (2) The photovoltaic structure of the present invention is modularly designed. The wind power monopile foundation, top frame and diagonal bracing frame can be divided into multiple modules, which facilitates marine transportation. The segmented hoisting does not require large ship machinery equipment. Attached Figure Description

[0024] Figure 1 This is an isometric view of the photovoltaic structure of the present invention;

[0025] Figure 2 This is a front view of the photovoltaic structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the segmented top frame of the present invention;

[0027] Figure 4 This is a schematic diagram of the ring beam of the present invention;

[0028] Figure 5 This is a schematic diagram of the segmented ring beam connection of the present invention;

[0029] Figure 6 This is a schematic diagram of the connection between the ring beam and the clamp of the present invention;

[0030] Figure 7 This is a schematic diagram showing the connection between the top frame and the diagonal brace frame of the present invention.

[0031] In the diagram: 1. Wind turbine monopile foundation, 2. Top frame, 2-1 circumferential beam, 2-2 radial beam, 2-3 vertical connecting rod, 2-4 upper transverse connecting plate, 2-5 bolt, 3 diagonal bracing frame, 3-1 lower transverse connecting plate, 4 photovoltaic module, 5 maintenance access, 6 / 8 ring beam, 6-1 bolt, 6-2 gasket, 7-1 slot, 7-2 strut. Detailed Implementation

[0032] The following description further illustrates the structures involved in this invention and the technical terms used therein. These descriptions are merely illustrative of how the invention is implemented and do not constitute any limitation on the invention.

[0033] In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "lateral," and "longitudinal," 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 indicated position or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this invention, unless otherwise explicitly specified and limited, terms such as "connection" and "fixation" should be interpreted broadly. For example, "fixation" can mean a fixed connection, a detachable connection, or an integral part; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] like Figure 1-7 As shown in the figure, this embodiment introduces an offshore photovoltaic structure based on an offshore wind power monopile foundation, including a wind power monopile foundation 1, a top frame 2, a bracing frame 3, photovoltaic modules 4, and an operation and maintenance channel 5. The top frame 2 extends outward in a circular shape with the wind power monopile foundation 1 as the center. The bracing frame 3 is located below the top frame 2 and connects the wind power monopile foundation 1 and the top frame 2. The photovoltaic modules 4 are installed on the upper surface of the top frame 2. The operation and maintenance channel 5 is arranged radially along the upper surface of the top frame 2 with the wind power monopile foundation 1 as the center.

[0036] The wind turbine monopile foundation 1 comprises a pile foundation, a tower, and a wind turbine. The tower is mounted on the pile foundation, and the wind turbine is mounted on the tower; this is existing technology and will not be elaborated upon here. The pile foundation is fixed to the seabed bedrock using a piling process. High-strength, corrosion-resistant steel is selected for the pile foundation to adapt to the marine environment and prevent seawater erosion and organism attachment. The design height of the wind turbine monopile foundation 1 ensures that its lower edge is flush with the top of the wind turbine pile. The diameter is designed and optimized based on the deflection requirements of the selected frame material to ensure sufficient support and resistance to wind and waves. Gaps are left between the photovoltaic panels to reduce the upward force of wind loads, while allowing rainwater to seep downwards.

[0037] like Figure 3 As shown, the top frame 2 extends outward in a circular shape and consists of multiple radial beams 2-2 and multiple circumferential beams 2-1. The radial beams 2-2 extend outward from the wind turbine monopile foundation 1, and the circumferential beams 2-1 are arranged along the circumference to form a grid structure for supporting the photovoltaic modules 4. The top frame 2 is made of lightweight, high-strength materials, such as aluminum alloy or composite materials, which reduces the overall weight while providing sufficient strength and rigidity. The curved upper surface of the top frame 2 reduces wind load, and the geometric design of the top frame 2 optimizes the arrangement angle of the photovoltaic modules 4, maximizing the solar energy capture efficiency.

[0038] like Figure 2 As shown, the diagonal bracing frame 3 consists of multiple diagonal braces, each connected at one end to the pile foundation and at the other end to the top frame 2, arranged radially to evenly distribute structural stress. The function of the diagonal bracing frame 3 is to increase the overall structural strength and stability, preventing the photovoltaic modules 4 from swaying and shifting under strong winds and wave impacts. The diagonal bracing frame 3 is also made of corrosion-resistant steel, capable of resisting the erosion of the marine environment. The diagonal braces are connected by welding or bolts to form a rigid, integrated structure.

[0039] like Figure 3-6As shown, the top frame 2 is a segmented structure for easy installation and disassembly. Each top frame 2 is equipped with a ring beam 6, and adjacent sections are connected to washers 6-2 by bolts 6-1. A circumferential clamp is installed on the pile foundation, consisting of a groove 7-1 and a strut 7-2. The ring beam 6 is inserted into the groove 7-1, and one end of the strut 7-2 is welded to the pile foundation, while the other end is fixed to the bottom of the groove 7-1. The diagonal bracing frame 3 is also a segmented structure, with a ring beam 8 on each diagonal bracing frame 3. Circumferential clamps are installed on the pile foundation, and the diagonal bracing frame 3 is fixed to the pile foundation by the ring beams and clamps.

[0040] like Figure 7 As shown, the top frame 2 and the diagonal brace frame 3 are connected by bolts and are detachable. The bottom of the top frame 2 is provided with a vertical connecting rod 2-3 and an upper horizontal connecting plate 2-4. One end of the vertical connecting rod 2-3 is welded and fixed to the top frame 2, and the other end is welded and fixed to the upper horizontal connecting plate 2-4. The diagonal brace frame 3 is welded and fixed with a lower horizontal connecting plate 3-1, which is fixed to the upper horizontal connecting plate 2-5 by bolts 2-5.

[0041] Photovoltaic modules 4 are mounted on the grid of the top frame 2, with each module secured to the top frame 2 by a bracket. Photovoltaic modules 4 utilize high-efficiency monocrystalline or polycrystalline silicon photovoltaic panels, offering high conversion efficiency and durability. The arrangement angle of the photovoltaic modules 4 is calculated based on the latitude of the location using the formula: Optimal tilt angle = latitude × 0.87 + 3.4°, ensuring maximum sunlight absorption and improved power generation efficiency.

[0042] The connection between the photovoltaic modules 4 is achieved by collecting the cables through a junction box, sending them into the pile foundation through a cable duct, and then transmitting them to the onshore power grid through a submarine cable.

[0043] like Figure 1 As shown, multiple maintenance passages 5 are evenly spaced to facilitate inspection and repair by maintenance personnel. Maintenance passages 5 are equipped with inspection platforms and emergency escape facilities to improve maintenance efficiency and safety. The design of maintenance passages 5 takes into account both personnel accessibility and safety; they are generally 0.6m wide and include emergency lighting and rescue equipment at key locations.

[0044] The construction method for offshore photovoltaic structures based on monopile offshore wind power foundations, as described above, includes the following steps:

[0045] Step 1: Install wind turbine monopile foundations;

[0046] Step 2: Install the diagonal bracing frame on the pile foundation;

[0047] Step 3: Install the top frame;

[0048] Step 4: Install the photovoltaic modules on the top frame;

[0049] Step 5: Install the operation and maintenance channel.

[0050] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An offshore photovoltaic structure based on an offshore wind turbine monopile foundation, comprising a wind turbine monopile foundation and photovoltaic modules, wherein the wind turbine monopile foundation includes a pile foundation, a tower, and a wind turbine, characterized in that: It also includes a top frame, a bracing frame, and an operation and maintenance channel. The top frame extends outward in a circle with the pile foundation as the center. The bracing frame is located below the top frame and connects the pile foundation and the top frame. The photovoltaic modules are installed on the upper surface of the top frame. The operation and maintenance channel is arranged radially along the upper surface of the top frame.

2. The offshore photovoltaic structure based on an offshore wind turbine monopile foundation as described in claim 1, characterized in that: The pile foundation is fixed to the seabed bedrock.

3. The offshore photovoltaic structure based on an offshore wind turbine monopile foundation as described in claim 1, characterized in that: The pile foundation is made of high-strength, corrosion-resistant materials.

4. The offshore photovoltaic structure based on an offshore wind turbine monopile foundation as described in claim 1, characterized in that: The top frame extends outward in a circular shape and consists of multiple radial beams and circumferential beams. The radial beams extend outward along the pile foundation, and the circumferential beams are arranged in a circumferential direction to form a grid structure.

5. The offshore photovoltaic structure based on an offshore wind turbine monopile foundation as described in claim 1, characterized in that: The top frame is made of lightweight, high-strength material.

6. The offshore photovoltaic structure based on an offshore wind turbine monopile foundation as described in claim 1, characterized in that: The top frame is provided with a ring beam that encircles the pile foundation. The ring beam is a segmented structure, with adjacent segments connected by bolts and washers. The pile foundation is provided with a circumferential clamp, which consists of a clamping groove and a support rod. The ring beam is clamped in the clamping groove, and one end of the support rod is welded to the pile foundation, while the other end is fixed to the bottom of the clamping groove.

7. The offshore photovoltaic structure based on an offshore wind turbine monopile foundation as described in claim 1, characterized in that: The diagonal bracing frame consists of multiple diagonal bracing rods, each of which is connected at one end to the pile foundation and at the other end to the top frame, arranged radially.

8. The offshore photovoltaic structure based on an offshore wind turbine monopile foundation as described in claim 1, characterized in that: The diagonal bracing frame is made of corrosion-resistant material.

9. The offshore photovoltaic structure based on an offshore wind turbine monopile foundation as described in claim 1, characterized in that: The photovoltaic modules are made of monocrystalline silicon or polycrystalline silicon photovoltaic panels.

10. The construction method for an offshore photovoltaic structure based on an offshore wind power monopile foundation according to any one of claims 1-9, characterized in that: Includes the following steps: Step 1: Install wind turbine monopile foundations; Step 2: Install the diagonal bracing frame on the pile foundation; Step 3: Install the top frame; Step 4: Install the photovoltaic modules on the top frame; Step 5: Install the operation and maintenance channel.

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