Offshore floating type photovoltaic power generation platform

Abstract

An offshore floating type photovoltaic power generation platform comprises a plurality of photovoltaic group strings and a mooring system, and is characterized in that each photovoltaic group string comprises a plurality of photovoltaic modules capable of floating on the sea surface, the photovoltaic modules are sequentially hinged to form the photovoltaic group string, the photovoltaic group string has two states, in the first state, the photovoltaic modules are arranged in a stacked mode, and in the second state, the photovoltaic modules are arranged in a stacked mode; in the first state, the plurality of photovoltaic modules are spread in sequence to enable the photovoltaic string to be in a folded state, and in the second state, the plurality of photovoltaic modules are spread in sequence to enable the photovoltaic string to be in an unfolded state; the plurality of photovoltaic group strings in an unfolded state can be sequentially hinged to form a photovoltaic array, the plurality of mooring systems are arranged on the periphery of the photovoltaic array, and each mooring system comprises a plurality of mooring ropes directly or indirectly connected with the photovoltaic array. The offshore floating type photovoltaic power generation platform has the advantages that the offshore floating type photovoltaic power generation platform is modularized, and the production cost is reduced; the offshore photovoltaic platform is convenient to transport and install, the photovoltaic group strings are in a folded state in the transportation process and can be rapidly unfolded on the sea, and the transportation and installation cost of each watt is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of marine photovoltaic platforms, and in particular to an offshore floating photovoltaic power generation platform. Background Art

[0002] Offshore photovoltaic power generation platforms are important facilities for the development and utilization of offshore solar energy resources. According to the characteristics of their supporting structures, they can be divided into two categories: fixed and floating offshore photovoltaic power generation platforms. Among them, offshore floating photovoltaic power generation platforms use floating structures to float photovoltaic modules on the water surface to generate electricity, saving land resources while reducing the possible shielding and module temperature of photovoltaic modules, achieving better power generation efficiency, and gradually developing into an important part of clean new energy in the ocean.

[0003] At present, offshore floating photovoltaic power generation platforms can be divided into two types: rigid semi-submersible platforms and flexible thin-film platforms. The semi-submersible platform, as shown in the Chinese invention application with patent application number CN202410721204.8 (application publication number CN118560652A), includes photovoltaic modules, floating support structures and mooring systems. The floating support structure can support photovoltaic modules and is connected to the mooring system. The flexible thin-film platform, as shown in the Chinese invention application with patent application number CN202411545989.4 (application publication number CN119058903A), includes a thin film, a photovoltaic panel, a first mounting position and a second mounting position. The thin film is installed between the first mounting position and the second mounting position. A plurality of photovoltaic panels are installed on the thin film. The first mounting position and / or the second mounting position are provided with a floating body and connected to the mooring cable, so that the photovoltaic panel can float on the sea to generate electricity.

[0004] However, the success of offshore floating photovoltaic power generation depends on its economic efficiency. Existing offshore floating photovoltaic power generation platforms face the following problems: (1) Their construction and transportation are difficult, inefficient and costly. For example, the semi-submersible platform mentioned above is a large-scale marine engineering equipment. It takes up a large space during construction and transportation, and requires a large construction site close to the coastline and professional marine engineering equipment production capacity. In addition, the installed capacity that can be transported at a time is relatively low, only at the kilowatt level; (2) The large-scale production and installation of existing offshore floating photovoltaic power generation platforms is difficult. For example, the photovoltaic panels of the flexible film platform mentioned above need to be customized, and personnel need to step on the film on the water surface to install the photovoltaic panels one by one, which is not convenient for rapid large-scale production and difficult to improve the economic efficiency of offshore floating photovoltaic power generation platforms. Therefore, further improvements need to be made to offshore floating photovoltaic power generation platforms. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an offshore floating photovoltaic power generation platform that can be mass-produced and is easy to transport and install in response to the above-mentioned existing technical status.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: the offshore floating photovoltaic power generation platform includes multiple photovoltaic strings and a mooring system, characterized in that: the photovoltaic string includes multiple photovoltaic modules that can float on the sea surface, and multiple photovoltaic modules are hinged in sequence to form a photovoltaic string, and the photovoltaic string has two states. In the first state, the multiple photovoltaic modules are stacked and arranged so that the photovoltaic string is in a folded state. In the second state, the multiple photovoltaic modules are spread out in sequence so that the photovoltaic string is in an unfolded state; multiple photovoltaic strings in the unfolded state can be hinged in sequence to form a photovoltaic array, and multiple mooring systems are arranged on the periphery of the photovoltaic array, and the mooring system includes multiple mooring ropes directly or indirectly connected to the photovoltaic array.

[0007] As a solution of a photovoltaic module, preferably, the photovoltaic module includes a photovoltaic component, a frame and a floating plate, the photovoltaic component is fixed on the frame, the floating plate is embedded and fixed in the cavity of the frame, and a plurality of hinges are respectively provided around the frame, and two adjacent photovoltaic modules are hinged by the hinges. The photovoltaic component is manufactured in accordance with industry standards, and the photovoltaic module is composed of a photovoltaic component, a frame and a floating plate from top to bottom, so that the volume of the photovoltaic module is smaller, the volume of the photovoltaic module when stacked is also smaller, and even if the photovoltaic string is folded, the space occupied is smaller, and the floating plate of the photovoltaic module can float in the sea water, so that the photovoltaic module can float on the sea surface.

[0008] As a solution for articulating the photovoltaic module, preferably, the articulated member includes an articulated seat and a connecting rod, the articulated seat is fixed to the outer end of the frame, and the two ends of the connecting rod are respectively articulated on two opposite articulated seats. The articulated member can make the two connected photovoltaic modules rotate 360 ​​degrees, so that the photovoltaic string formed by connecting multiple photovoltaic modules in series can switch between the first state and the second state.

[0009] As a solution for fixing the photovoltaic assembly on the frame, preferably, a plurality of limit rods are fixed on the top surface of the frame, and the plurality of limit rods enclose an installation space corresponding to the photovoltaic assembly. After the photovoltaic assembly is placed in the installation space, a pressure block is installed on the limit rod, and the pressure block can press the photovoltaic assembly. When the photovoltaic assembly is placed in the installation space, the limit rod can limit the lateral movement of the photovoltaic assembly, and the pressure block can limit the vertical movement of the photovoltaic assembly from leaving the installation space, thereby fixing the photovoltaic assembly on the frame.

[0010] Preferably, the limiting rod is a screw rod, and the pressing block is a nut. The screw rod is welded to the frame, and the nut is an anti-dropping nut, which is threadedly connected to the screw rod to press the photovoltaic module.

[0011] As a solution of the mooring system, preferably, the mooring system includes a first cable splitter capable of floating on the sea surface, the mooring rope includes a plurality of first mooring ropes and a second mooring rope, the first cable splitter is provided with a plurality of connection points for gathering the first mooring ropes, one end of the first mooring rope is connected to the photovoltaic modules on the edge sides of the photovoltaic array, each connection point on the first cable splitter is connected to the other end of at least two first mooring ropes, and each connection point on the first cable splitter is also connected to a second mooring rope. The force on at least two first mooring ropes is transmitted to a second mooring rope, and the first mooring rope and the second mooring rope form a graded force transmission path through the first cable splitter, so that the multiple mooring points of the mooring system are gathered together, thereby making the offshore floating photovoltaic power generation platform more stable.

[0012] Preferably, the first cable splitter is a floating tube, which can float on the sea surface and can be provided with multiple connection points. The floating tube is easy to manufacture in batches and has a low production cost.

[0013] In a further design, the mooring system further includes a second cable splitter capable of floating on the sea surface, the mooring rope further includes a third mooring rope, one end of the second mooring rope is connected to the connection point corresponding to the first cable splitter, and the other end is connected to the second cable splitter, one end of the third mooring rope is connected to the second cable splitter, and the other end is connected to the seabed anchor. The second cable splitter collects the forces of all the second mooring ropes to a third mooring rope, and the third mooring rope is connected to the mooring anchor on the seabed, and finally transmits the forces of the photovoltaic array to the seabed through a multi-stage force transmission path.

[0014] Preferably, the second cable splitter is a buoy, which can float on the sea surface and collect multiple mooring lines.

[0015] In a further design, the mooring system further includes a mooring anchor, and the adjacent photovoltaic arrays share the mooring anchor. Sharing the mooring anchor can effectively reduce the occupation of ocean space and improve the utilization rate of ocean area.

[0016] Compared with the prior art, the advantages of the present invention are:

[0017] (1) The photovoltaic array of the offshore floating photovoltaic power generation platform is composed of a plurality of photovoltaic strings connected in an articulated manner, and the photovoltaic strings are composed of a plurality of photovoltaic modules connected in an articulated manner, so that the offshore floating photovoltaic power generation platform is modularized, and the photovoltaic modules can be mass-produced using the intelligent manufacturing model, thereby reducing the production cost of the offshore floating photovoltaic power generation platform;

[0018] (2) The photovoltaic strings of the offshore floating photovoltaic power generation platform are in the first state during transportation, that is, the photovoltaic modules are stacked, so that the photovoltaic strings become a rectangular structure, thereby reducing the space occupied by the photovoltaic strings during transportation, making the offshore floating photovoltaic power generation platform easy to transport;

[0019] (3) The photovoltaic strings of the offshore floating photovoltaic power generation platform are in the second state during installation and operation, that is, the photovoltaic modules are spread out one by one, and the photovoltaic strings are in the unfolded state. The photovoltaic strings in the second state can be hinged to form a photovoltaic array. Each photovoltaic module of the photovoltaic array can float on the sea surface. Therefore, the photovoltaic array can move with the waves during operation, so that the offshore floating photovoltaic power generation platform can always be illuminated and generate electricity during operation;

[0020] (4) The offshore floating photovoltaic power generation platform only needs to stretch the photovoltaic modules and spread them out in sequence at sea to change the photovoltaic strings from the first state to the second state, and complete the installation of the photovoltaic strings. When disassembling the photovoltaic strings, it is only necessary to push the photovoltaic modules inward in both directions to change the photovoltaic strings from the second state to the first state. Therefore, the offshore floating photovoltaic power generation platform of the present application is fast and convenient to load and unload, and can meet the needs of a shorter construction period or large-scale construction.

[0021] (5) The mooring system of the offshore floating photovoltaic power generation platform includes multiple mooring cables, one end of some of the mooring cables is directly connected to the photovoltaic array, and the other end is connected to the mooring cables of the remaining parts, so that the mooring system forms a multi-level force transmission path, thereby improving the stability of the offshore floating photovoltaic platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0023] Figure 2 for Figure 1 A top view of

[0024] Figure 3 is a top view of a mooring system in an embodiment of the present invention;

[0025] Figure 4 A top view of two photovoltaic arrays sharing a mooring anchor in an embodiment of the present invention;

[0026] Figure 5 is a top view of a photovoltaic array in an embodiment of the present invention;

[0027] Figure 6 is a process diagram of a photovoltaic string changing from a first state to a second state in an embodiment of the present invention;

[0028] Figure 7A schematic diagram of the structure of a photovoltaic module in an embodiment of the present invention;

[0029] Figure 8 Schematic diagram of the structure of the hinge in the embodiment of the present invention. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below with reference to the accompanying drawings.

[0031] like Figures 1 to 8 Shown is the best embodiment of the present invention.

[0032] like Figures 1 to 4 As shown, the offshore floating photovoltaic power generation platform of this embodiment includes a photovoltaic array 3 and a mooring system 4, and multiple mooring systems 4 are arranged on the periphery of the photovoltaic array 3. Among them, the mooring system 4 of this embodiment includes multiple mooring ropes 41, a first cable splitter 42, a second cable splitter 43 and a mooring anchor 44. The first cable splitter 42 and the second cable splitter 43 can both float on the sea surface. The first cable splitter 42 is a floating tube, and the second cable splitter 43 is a buoy. The mooring anchor 44 is fixed on the seabed. Adjacent photovoltaic arrays 3 can share the mooring anchor 44. Sharing the mooring anchor 44 can effectively reduce the occupation of the ocean space and improve the utilization rate of the ocean area.

[0033] The mooring rope 41 of this embodiment is directly or indirectly connected to the photovoltaic array 3, so that the mooring system 4 forms a multi-level force transmission path. Specifically, the mooring rope 41 of this embodiment includes multiple first mooring ropes 411, multiple second mooring ropes 412 and a third mooring rope 413. The first cable splitter 42 is provided with multiple connection points for gathering the first mooring ropes 411. One end of each first mooring rope 411 is connected to a photovoltaic module 2 on the edge side of the photovoltaic array 3. The other ends of two adjacent first mooring ropes 411 are connected to a connection point on the first cable splitter 42, so that the two first mooring ropes 411 are gathered on the first cable splitter 42; each connection point of the first cable splitter 42 is also connected to one end of a second mooring rope 412. The other end of the cable 412 is connected to the second cable splitter 43. The first cable splitter 42 collects and transfers the force of the first mooring rope 411 to the second mooring rope 412, and all the forces of the second mooring rope 412 are collected on the second cable splitter 43; one end of the third mooring rope 413 is connected to the second cable splitter 43, and the other end is connected to the mooring anchor 44. The second cable splitter 43 collects and transfers the force of the second mooring rope 412 to the third mooring rope 413, and the third mooring rope 413 is fixed on the mooring anchor 44. Therefore, the mooring system 4 forms a multi-level force transmission path, thereby improving the stability of the offshore floating photovoltaic platform.

[0034] like Figure 5As shown, the photovoltaic array 3 of this embodiment is composed of a plurality of photovoltaic strings 1 in an unfolded state, which are hinged in sequence. The photovoltaic string 1 includes a plurality of photovoltaic modules 2 that can float on the sea surface. The photovoltaic modules 2 are in the shape of a rectangular parallelepiped. The plurality of photovoltaic modules 2 are hinged in sequence by means of hinges 5 to form the photovoltaic string 1. The photovoltaic string 1 has two states. In the first state, the photovoltaic modules 2 are stacked and arranged so that the photovoltaic string 1 is in a folded state. In the second state, the plurality of photovoltaic modules 2 are spread out in sequence so that the photovoltaic string 1 is in an unfolded state. The process of the photovoltaic string 1 changing from the first state to the second state is shown in FIG. Figure 6 The photovoltaic string 1 of this embodiment has a good folding effect, and the folding scaling ratio can reach 1:10. For example, the photovoltaic string 1 in the folded state is 5 meters long, 2.4 meters wide, and 1.2 meters high, and the photovoltaic string 1 in the unfolded state on the sea surface is 50 meters long, 2.4 meters wide, and 0.12 meters high, making the deployment efficiency of the photovoltaic array 3 higher.

[0035] like Figure 7 As shown, the photovoltaic module 2 in this embodiment includes a photovoltaic assembly 21, a frame 22 and a floating plate 23. The photovoltaic assembly 21 is fixed on the frame 22, and the floating plate 23 is embedded and fixed in the cavity of the frame 22. The floating plate 23 can float in the sea water, so that the photovoltaic module 2 can float on the sea surface. In order to enable the photovoltaic assembly 21 to be fixed on the frame 22, a plurality of limit rods 221 are fixed on the frame 22. The limit rods 221 are screws, which can be welded on the frame 22. The plurality of limit rods 221 surround an installation space corresponding to the photovoltaic assembly 21. The limit rods 221 can limit the lateral movement of the photovoltaic assembly 21. After the photovoltaic assembly 21 is placed in the installation space, a pressure block 222 is installed on the limit rod 221. The pressure block 222 is an anti-slip nut. The nut is threadedly connected with the screw to press the photovoltaic assembly 21. The pressure block 222 can limit the vertical movement of the photovoltaic assembly 21 from leaving the installation space, so that the photovoltaic assembly 21 is fixed on the frame 22. Therefore, the photovoltaic module 2 of this embodiment is relatively small in size, and the photovoltaic string 1 composed of the photovoltaic module 2 is also smaller in size when folded, which is convenient for reducing the volume occupied by the photovoltaic string 1 during transportation, thereby making the offshore floating photovoltaic power generation platform easy to transport.

[0036] In addition, a plurality of hinges 5 are respectively provided around the frame 22 of the present embodiment, and two adjacent photovoltaic modules 2 are hingedly connected by the hinges 5. Specifically, Figure 8 As shown, the hinge 5 of this embodiment includes an hinge seat 51 and a connecting rod 52. The hinge seat 51 is fixed to the outer end of the frame 22, and the two ends of the connecting rod 52 are respectively hinged on two opposite hinge seats 51. The hinge 5 can enable the two connected photovoltaic modules 2 to rotate 360 ​​degrees, so that the photovoltaic string 1 formed by connecting multiple photovoltaic modules 2 in series can switch between the first state and the second state.

[0037] The workflow of this embodiment is:

[0038] A. During the transportation of the offshore floating photovoltaic power generation platform, the photovoltaic string 1 is in the first state, and the photovoltaic modules 2 of the photovoltaic string 1 are stacked by means of the hinge 5, so that the photovoltaic string 1 becomes a small rectangular structure;

[0039] B. When the offshore floating photovoltaic power generation platform is installed on the sea surface, the photovoltaic string 1 in the first state is stretched so that the plurality of photovoltaic modules 2 are spread out in sequence, and the photovoltaic string 1 changes to the second state, that is, the photovoltaic string 1 is in the unfolded state, and then the plurality of photovoltaic strings 1 in the unfolded state are hinged in sequence to form a photovoltaic array 3;

[0040] C. Then, the mooring system 4 is installed around the photovoltaic array 3, that is, one end of the first mooring rope 411 is connected to the photovoltaic modules 2 on the edge side of the photovoltaic array 3, and the other end is connected to the connection point of the first cable splitter 42. One end of the second mooring rope 412 is connected to the connection point of the first cable splitter 42, and the other end is connected to the second cable splitter 43. One end of the third mooring rope 413 is connected to the second cable splitter 43, and the other end is connected to the mooring anchor 44, so that the mooring system 4 forms a multi-level force transmission path, thereby completing the installation of the offshore floating photovoltaic power generation platform;

[0041] D. When the offshore floating photovoltaic power generation platform is operating on the sea, the photovoltaic modules 2 in the photovoltaic array 3 move along with the waves on the sea surface.

[0042] The offshore floating photovoltaic power generation platform of the present application can be applied to scenarios such as "wind and solar in one field" in offshore wind farms, utilization of port enclosed but unreclaimed sea areas and nuclear power warm drainage areas, seawater desalination, direct hydrogen production from seawater (methanol, ammonia and other green fuels), and off-grid community microgrids on islands; it can also be used on land water surfaces other than sea surfaces.

Claims

1. An offshore floating photovoltaic power generation platform, comprising a plurality of photovoltaic strings (1) and a mooring system (4), characterized in that: The photovoltaic string (1) comprises a plurality of photovoltaic modules (2) capable of floating on the sea surface, wherein the plurality of photovoltaic modules (2) are hingedly connected in sequence to form the photovoltaic string (1), and the photovoltaic string (1) has two states. In a first state, the plurality of photovoltaic modules (2) are stacked and arranged so that the photovoltaic string (1) is in a folded state, and in a second state, the plurality of photovoltaic modules (2) are spread out in sequence so that the photovoltaic string (1) is in an unfolded state; the plurality of photovoltaic strings (1) in the unfolded state can be hingedly connected in sequence to form a photovoltaic array (3), and the plurality of mooring systems (4) are arranged on the periphery of the photovoltaic array (3), and the mooring system (4) comprises a plurality of mooring ropes (41) directly or indirectly connected to the photovoltaic array (3).

2. The offshore floating photovoltaic power generation platform according to claim 1, characterized in that: The photovoltaic module (2) comprises a photovoltaic component (21), a frame (22) and a floating plate (23); the photovoltaic component (21) is fixed on the frame (22); the floating plate (23) is embedded and fixed in a cavity of the frame (22); a plurality of hinges (5) are respectively provided around the frame (22); and two adjacent photovoltaic modules (2) are hingedly connected via the hinges (5).

3. The offshore floating photovoltaic power generation platform according to claim 2, characterized in that: The hinged member (5) comprises a hinged seat (51) and a connecting rod (52); the hinged seat (51) is fixed to the outer end of the frame (22); and the two ends of the connecting rod (52) are respectively hinged to two opposite hinged seats (51).

4. The offshore floating photovoltaic power generation platform according to claim 2, characterized in that: A plurality of limiting rods (221) are fixed on the top surface of the frame (22), and the plurality of limiting rods (221) enclose an installation space corresponding to the photovoltaic assembly (21). After the photovoltaic assembly (21) is placed in the installation space, a pressing block (222) is installed on the limiting rods (221), and the pressing block (222) can press the photovoltaic assembly (21).

5. The offshore floating photovoltaic power generation platform according to claim 4, characterized in that: The limiting rod (221) is a screw rod, and the pressing block (222) is a nut.

6. The offshore floating photovoltaic power generation platform according to any one of claims 1 to 5, characterized in that: The mooring system (4) comprises a first cable splitter (42) capable of floating on the sea surface, the mooring rope (41) comprises a plurality of first mooring ropes (411) and a second mooring rope (412), the first cable splitter (42) is provided with a plurality of connection points for gathering the first mooring ropes (411), one end of the first mooring rope (411) is connected to the photovoltaic modules (2) on the edge sides of the photovoltaic array (3), each connection point on the first cable splitter (42) is connected to the other end of at least two first mooring ropes (411), and each connection point on the first cable splitter (42) is also connected to a second mooring rope (412).

7. The offshore floating photovoltaic power generation platform according to claim 6, characterized in that: The first cable splitter (42) is a floating tube.

8. The offshore floating photovoltaic power generation platform according to claim 6, characterized in that: The mooring system (4) further comprises a second cable splitter (43) capable of floating on the sea surface, the mooring rope (41) further comprises a third mooring rope (413), one end of the second mooring rope (412) is connected to a corresponding connection point on the first cable splitter (42), and the other end is connected to the second cable splitter (43), one end of the third mooring rope (413) is connected to the second cable splitter (43), and the other end is connected to a seabed anchor.

9. The offshore floating photovoltaic power generation platform according to claim 8, characterized in that: The second cable splitter (43) is a buoy.

10. The offshore floating photovoltaic power generation platform according to claim 1, characterized in that: The mooring system (4) further comprises a mooring anchor (44), and adjacent photovoltaic arrays (3) share the mooring anchor (44).

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