Cable-supported ocean photovoltaic floating system

Abstract

The invention relates to the technical field of photovoltaic equipment, and discloses a cable-supported marine photovoltaic floating system, which comprises floating units, a cable net structure, a frame structure and a mooring structure, the cable net structure comprises longitudinal cables and transverse cables, the longitudinal cables and the transverse cables intersect to form a grid shape, and the longitudinal cables and the transverse cables intersect and are fixed in the floating units; the outer ends of the longitudinal cables and the outer ends of the transverse cables are connected with the frame structure, the frame structure is connected with the mooring structure, and the mooring structure is used for keeping pretension of the transverse cables and the longitudinal cables. According to the scheme, the longitudinal cables and the transverse cables are stressed in a face mode, a traditional point stress mode is replaced, external force can be dispersed more evenly, the local damage risk is reduced, and high fatigue resistance is achieved; the longitudinal cables and the transverse cables are fixed through the floating units, relative displacement of the longitudinal cables and the transverse cables is avoided, the integrity of the cable net structure is guaranteed, the frame structure and the mooring structure fluctuate up and down along with stormy waves and adapt to dynamic changes of the cable net structure, and the stability and durability of the whole floating type offshore photovoltaic system in the complex marine environment are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic equipment, and particularly relates to a cable-supported marine photovoltaic floating system. Background Art

[0002] Large-scale photovoltaic power stations are limited by land resource problems and are deployed in remote areas with low population density. The infrastructure costs and losses of long-distance power transmission add high costs, which has become a key bottleneck restricting the development of the photovoltaic industry. The coastline is long, the offshore solar energy resources are rich, and the water area is vast. Offshore floating photovoltaics use floating platforms to support photovoltaic modules for power generation at sea, overcoming the problem of traditional land-based photovoltaics being limited by land resources. Moreover, due to the natural cooling of water bodies and the water surface reflection effect, its power generation efficiency can be increased by about 10% - 15% compared with land-based photovoltaics. However, its development faces many challenges.

[0003] Traditional floating structures are mainly divided into the following categories: 1. Buoy combined with truss structure: The buoy combined with truss structure uses modular buoys combined with steel or aluminum trusses to form a floating platform to support photovoltaic panels. However, the rigid truss cannot move with the waves, and the stress concentration is relatively large. If sufficient rigidity is to be achieved, a large amount of steel consumption is required, resulting in low economy. It is only suitable for small projects and in areas with relatively mild environmental conditions; 2. Pure floating body structure: The pure floating body structure uses a modular floating body system made of high-density polyethylene (HDPE). The floating bodies directly support the photovoltaic panels, and the floating bodies are connected by pins or bolts to form a large platform. The flexible connection enables the overall platform to move up and down with the waves. However, this is applicable to the field of inland water floating photovoltaics. The offshore wind and wave environment is more severe and the environmental tidal difference is larger. The hinges are difficult to bear the high load and fatigue problems brought by continuous wave motion. This inland fresh water floating photovoltaic solution is difficult to apply to the marine environment; 3. Flexible film structure: The flexible film structure uses circular buoyancy rings to tighten a special material to make a flexible film resistant to the marine environment. The photovoltaic panels are installed on the film, and the whole system can move up and down with the waves, reducing the environmental loads brought by ocean currents and sea winds. However, this film structure is prone to water accumulation. The water will generate additional weight, causing the film to bear greater external pressure. When the water accumulation is deep, the weight of the water will increase the pressure on the film, making the film in a large tensile or compressive state, and the film is prone to fatigue damage, which will further lead to overall fracture and buoyancy ring failure, resulting in the film and components sinking to the bottom of the sea. In summary, it is urgent to carry out further innovation research on the structural system of offshore photovoltaic structures. Summary of the Invention

[0004] The present invention aims to provide a cable-supported marine photovoltaic floating system to solve the problems that the current photovoltaic floating body structure is not suitable for the marine environment and the structure is prone to damage.

[0005] To achieve the above object, the present invention adopts the following technical solution: A cable-supported marine photovoltaic floating system, comprising: a floating unit, a cable net structure, a frame structure and a mooring structure. The cable net structure includes longitudinal cables and transverse cables, the longitudinal cables and the transverse cables intersect and form a grid shape, the longitudinal cables and the transverse cables intersect and are fixed inside the floating unit, the outer ends of the longitudinal cables and the outer ends of the transverse cables are connected to the frame structure, the frame structure is connected to the mooring structure, the mooring structure is used to maintain the pre-tension of the transverse cables and the longitudinal cables, and the mooring structure is connected with an anchoring device; the mooring structure includes floats and mooring cables, and energy-consuming floats for increasing its buoyancy and movement resistance are provided on the part of the mooring cable submerged in seawater.

[0006] Principle of this solution: Pass the longitudinal cables and the transverse cables through the corresponding floating units in sequence to complete the assembly of the floating units and the cable net structure. Then connect the outer ends of the longitudinal cables and the transverse cables to the frame structure at the corresponding positions. Then connect the mooring structure and the frame structure. After all the installations are completed, install the photovoltaic panels on the corresponding floating units. The longitudinal cables and the transverse cables can flexibly adjust their own shapes under the action of wind and waves, effectively buffering the external force impact. The floating units fix the longitudinal cables and the transverse cables, avoiding the relative displacement of the longitudinal cables and the transverse cables, ensuring the integrity of the cable net structure. The frame structure and the mooring structure rise and fall with the wind and waves, adapting to the dynamic changes of the cable net structure, ensuring the stability and durability of the entire floating offshore photovoltaic in a complex marine environment.

[0007] Advantages of this solution: The longitudinal cables and the transverse cables are under surface stress, replacing the traditional point stress mode. This makes it more resilient when dealing with severe wind and wave impacts in the marine environment, can disperse the external force more evenly, reduce the risk of local damage, and has strong anti-fatigue properties; the floating units fix the longitudinal cables and the transverse cables, avoiding the relative displacement of the longitudinal cables and the transverse cables, ensuring the integrity of the cable net structure. The anchoring of each floating unit is independent of each other. This independence ensures that the force transmission is effectively blocked, that is, the force will not be conducted and transferred between the floating units, fundamentally eliminating the risk of load accumulation inside the structure, enabling the entire structure to maintain a stable and balanced stress state during long-term operation, and greatly improving the reliability and durability of the structure; the frame structure and the mooring structure rise and fall with the wind and waves, adapting to the dynamic changes of the cable net structure, ensuring the stability and durability of the entire floating offshore photovoltaic in a complex marine environment.

[0008] Preferably, a cross-shaped groove is provided inside the floating unit, and the transverse cable and the longitudinal cable are installed in the cross-shaped groove. The cross-shaped groove is convenient for fixing the longitudinal cable and the transverse cable inside the floating unit, and at the same time, the cross-shaped groove can be used to limit the grid shape formed by the longitudinal cable and the transverse cable.

[0009] Preferably, the floating unit includes upper and lower symmetric floating plates, the opposite surfaces of the floating plates are provided with cross-shaped grooves, and the upper and lower symmetric floating plates are connected in a detachable manner.

[0010] Preferably, the cross-shaped groove is located on the diagonal of the floating board.

[0011] Preferably, connecting holes are correspondingly provided on the floating board symmetrically up and down, and the connecting holes are evenly arranged on the part of the floating board without the cross-shaped groove.

[0012] Preferably, the frame structure includes floating barrels, which are arranged outside the extending direction of the longitudinal cables and outside the extending direction of the transverse cables. The outer ends of the transverse cables and the outer ends of the longitudinal cables are both connected to the corresponding floating barrels. The peripheral floating barrels play a certain protective role. They can serve as the first line of defense against wave loads. When the sea waves come, the peripheral floating barrels come into contact with them first. Relying on their own structural characteristics and reasonable shape design, the impact force of the waves is initially dispersed and buffered, reducing the load intensity transmitted to the internal structure subsequently, and providing a reliable protection barrier for components such as floating units and photovoltaic panels in the core area of the floating photovoltaic array.

[0013] Preferably, one end of the mooring cable is connected to a float. There is at least 1 float. The outer ends of the transverse cables and the outer ends of the longitudinal cables pass through the floating barrels and are connected to the corresponding floats at the corresponding positions. The other end of the mooring cable is connected with an anchoring structure. The mooring cable is fixed to the corresponding seabed through an anchoring device. The mooring structure with floats can keep the mooring cable always under a certain pre-tension, so as to drive the cable net structure on the water surface to always maintain a certain pre-tension. In this way, it can effectively ensure that a certain distance is stably maintained between each floating unit, avoiding the mutual collision of floating units; and effectively preventing the bad situation that the water surface structure generates a large horizontal displacement due to the slack of the mooring cable.

[0014] Adopting the form that the cable net passes through the peripheral floating barrels realizes the optimization of mechanical stress. In this system, the peripheral floating barrels only bear axial pressure, and the stress state is greatly simplified. On the one hand, it effectively avoids the structural hidden dangers caused by complex stress and improves the stability and safety of the overall structure; on the other hand, due to the simple stress, we can choose lighter materials when designing the peripheral floating barrels. While ensuring the structural performance, it greatly saves the material cost, and thus reduces the design cost of the project as a whole, laying a solid foundation for large-scale popularization and application.

[0015] Preferably, the outer ends of the preset number of longitudinal cables passing through a single floating barrel are connected to the same float, and the outer ends of the preset number of transverse cables passing through a single floating barrel are connected to the same float.

[0016] Preferably, the outer ends of the transverse cables are equally spaced on the floating barrel, and the outer ends of the longitudinal cables are equally spaced on the floating barrel.

[0017] Preferably, the energy-consuming floating ball includes a central spherical body and three identical circular plates distributed around the central spherical body. The centers of the circular plates coincide with the center of the central spherical body, and the three circular plates are orthogonal to each other. This shape design not only provides buoyancy but also enables the energy-consuming floating ball to be subjected to a large water resistance in any direction of movement. The design of the central spherical body can improve the structural strength of the floating ball and at the same time provide additional buoyancy to reduce the tension of the entire mooring cable gravity on the upper end of the mooring cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of an embodiment of the present invention.

[0019] Figure 2 is a top view schematic diagram (water surface part) of the structure of an embodiment of the present invention.

[0020] Figure 3 is a schematic structural diagram of the longitudinal cable, transverse cable and floating drum of an embodiment of the present invention.

[0021] Figure 4 is a schematic structural diagram of the longitudinal cable, transverse cable and floating unit of an embodiment of the present invention.

[0022] Figure 5 is a partial structural schematic diagram of the floating unit of an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following is further detailed through specific embodiments:

[0024] The reference numerals in the accompanying drawings of the specification include: transverse cable 1, longitudinal cable 2, floating unit 3, cross-shaped groove 31, floating drum 4, float 5, mooring cable 6, connection hole 7, energy-consuming floating ball 8.

[0025] Embodiment:

[0026] A cable-supported marine photovoltaic floating system, as Figure 1 - Figure 5 shown, includes: a floating unit 3, a cable net structure, a frame structure and a mooring structure.

[0027] The cable net structure includes longitudinal cables 2 and transverse cables 1. The longitudinal cables 2 and transverse cables 1 intersect to form a grid-like shape, and the intersection of the longitudinal cables 2 and transverse cables 1 is fixed inside the floating unit 3. The longitudinal cables 2 and transverse cables 1 are subjected to surface forces, replacing the traditional point-force mode. Compared with the hinge connection and pin connection between traditional floating modules, based on the connection form of the cable net and floating blocks, the floating platform originally only used to support the photovoltaic panels also serves as the connecting part at the cross intersections of the cable net structure, integrating multiple functions into one, reducing the material cost and construction cost of the structure, and laying a solid foundation for the efficient promotion and economic feasibility of the entire floating offshore photovoltaic project; it is more resilient when dealing with the impact of harsh wind, wave and current in the marine environment, can disperse external forces more evenly, reduce the risk of local damage, and has strong fatigue resistance; the floating unit 3 fixes the longitudinal cables 2 and transverse cables 1, avoiding the relative displacement of the longitudinal cables 2 and transverse cables 1, and ensuring the integrity of the cable net structure; the photovoltaic panels are laid on the floating unit 3, and the anchoring of each floating unit 3 is independent of each other. This independence ensures that the transmission of force is effectively blocked, that is, the force will not be conducted and transferred between the floating units 3, fundamentally eliminating the risk of gradual accumulation of load inside the structure, enabling the entire structure to maintain a stable and balanced stress state during long-term operation, and greatly improving the reliability and durability of the structure. In this embodiment, the size of the photovoltaic panel is 1.6m * 1.6m.

[0028] Both the longitudinal cables 2 and transverse cables 1 are flexible ropes, and the longitudinal cables 2 and transverse cables 1 are evenly spaced. In this embodiment, the spacing between the longitudinal cables 2 is 3.2m, and the spacing between the transverse cables 1 is 3.2m.

[0029] The floating unit 3 includes two identical floating plates up and down. One of the floating plates is provided with a cross-shaped groove 31, and the transverse cable 1 and longitudinal cable 2 are installed in the cross-shaped groove 31. The setting of the cross-shaped groove 31 facilitates fixing the longitudinal cable 2 and transverse cable 1 in the floating unit 3, and at the same time, the cross-shaped groove 31 can be used to limit the grid shape formed by the longitudinal cable 2 and transverse cable 1. In this embodiment, grooves can also be provided on the corresponding surfaces of the two floating plates to jointly form a cross-shaped groove 31. The shape of the cross-shaped groove 31 matches the sizes of the longitudinal cable 2 and transverse cable 1, making it easier to install the longitudinal cable 2 and transverse cable 1 into the cross-shaped groove 31. Preferably, a spherical-like cavity is formed at the center intersection of the upper and lower cross-shaped grooves 31. The inner diameter of the spherical-like cavity is slightly smaller than the sum of the diameters of the transverse cable 1 and longitudinal cable 2. In this way, a structure similar to a knot is formed by the transverse cable 1 and longitudinal cable 2 at the center of the cross-shaped groove 31. The transverse cable 1 and longitudinal cable 2 are easier to connect together, and at the same time, they are not easy to misplace and slide, enhancing the connection stability between the two.

[0030] The cross-shaped groove 31 is located on the diagonal of the floating board. Corresponding connection holes 7 are provided on the upper and lower symmetric floating boards. The connection holes 7 are evenly arranged on the part of the floating board that is not the cross-shaped groove 31. The connection holes 7 are used to install structures such as bolts and rivets, and the upper and lower floating boards are fixed by means of bolt connection and rivet connection. At the same time, the connection holes 7 can be used as an integrated installation interface in the subsequent design of photovoltaic module connectors to realize the integrated connection between the floating unit 3 and the photovoltaic module, improving the integrity and installation efficiency of the system.

[0031] At the nodes of the cable net formed by the intersection of the longitudinal cables 2 and the transverse cables 1, the rope binding process is pre-adopted for fixation to further ensure the firmness of the nodes and prevent relative slippage between the longitudinal cables 2 and the transverse cables 1. This design further restricts the degree of freedom of movement of the floating unit 3, enabling the design spacing between the floating units 3 to be further reduced. In this way, the laying density of the photovoltaic modules is increased, so that more photovoltaic modules can be laid in a unit area of the sea area.

[0032] The frame structure includes floating barrels 4. The floating barrels 4 are arranged outside the extension direction of the longitudinal cables 2 and outside the extension direction of the transverse cables 1. The outer ends of the transverse cables 1 and the outer ends of the longitudinal cables 2 are both connected to the corresponding floating barrels 4. The peripheral floating barrels 4 play a certain protective role. They can serve as the first line of defense against wave loads. When the sea waves come, the peripheral floating barrels 4 come into contact with them first. With their own structural characteristics and the streamlined surface design of the floating barrels 4, the impact force of the waves is initially dispersed and buffered, reducing the load intensity transmitted to the internal structure later, and providing a reliable protection barrier for the floating unit 3 and photovoltaic panels and other components in the core area of the floating photovoltaic array.

[0033] The form of the cable net passing through the peripheral floating barrels 4 is adopted to achieve the optimization of mechanical stress. In this system, the peripheral floating barrels 4 only bear axial pressure, and the stress state is greatly simplified. On the one hand, it effectively avoids the structural hidden dangers caused by complex stress and improves the stability and safety of the overall structure; on the other hand, due to the simple stress, we can choose lighter materials when designing the peripheral floating barrels 4. While ensuring the structural performance, it greatly saves the material cost, and thus reduces the project cost as a whole, laying a solid foundation for large-scale popularization and application.

[0034] The mooring structure includes a buoy 5 and a mooring cable 6. One end of the mooring cable 6 is connected to the buoy 5. There is at least one buoy 5. The buoy 4 is provided with holes in the radial direction. The outer ends of the transverse cable 1 and the longitudinal cable 2 respectively pass through the holes in the corresponding buoy 4 and are connected to the corresponding buoy 5. The mooring structure with buoys 5 can keep the mooring cable 6 under a certain pre-tension all the time, so as to drive the cable net structure on the water surface to also keep a certain pre-tension all the time, effectively ensuring that a certain distance is stably maintained between each floating unit 3 and avoiding the mutual collision of the floating units 3; and effectively preventing the adverse situation that the water surface structure generates a large horizontal displacement due to the slack of the mooring cable 6.

[0035] The outer ends of the preset number of longitudinal cables 2 passing through a single buoy 4 are connected to the same buoy 5, and the outer ends of the preset number of transverse cables 1 passing through a single buoy 4 are connected to the same buoy 5, further restricting the cable net structure, ensuring the distance between the longitudinal cables and the distance between the transverse cables, and avoiding the mutual collision of the floating plates. The outer ends of the transverse cable 1 are equally spaced on the buoy 4, and the outer ends of the longitudinal cable 2 are equally spaced on the buoy 4. By means of the buoy 4 and buoy 5 structures, the distance between the longitudinal cables 2 and the distance between the transverse cables 1 are maintained, ensuring that a certain distance is stably maintained between each floating unit 3 and avoiding the mutual collision of the floating units 3.

[0036] It also includes an anchor block. The other end of the mooring cable 6 is connected to the anchor block. The anchor block is used to connect the mooring (cable) to a fixed object, ensuring that the floating platform structure is fixed in the corresponding position and avoiding the displacement of the floating platform structure due to waves or wind force. An anchoring device can be set at the connection end of the mooring cable 6 and the seabed. For a soft seabed, a suction anchor can be used. The anchor body is vertically pressed into the seabed sediment layer through a hydraulic drive system, and rapid installation is realized by using the negative pressure adsorption principle; for a hard seabed, a concrete gravity anchor with an anti-scour structure can be configured; if necessary, the end of each mooring cable 6 can be bifurcated and connected to 2 - 3 auxiliary anchor points to form a redundant layout. A universal swivel and a tension adjustment device are arranged at the connection of the mooring cable and the gravity anchor, enabling the system to automatically adjust the pre-tension according to the tidal change and the impact of wind and waves, and ensuring stable gripping force under complex seabed conditions such as silt, sand, and rock foundation.

[0037] An energy-consuming floating ball 8 for increasing its buoyancy and movement resistance is also provided on the part of the mooring cable 6 immersed in seawater. Since the mooring cable 6 is relatively long, when not in use, the connection between the mooring cable 6 and the buoy 5 is always in a tense state under the influence of its own gravity. The energy-consuming floating ball 8 is set to disperse the force of the mooring cable 6. By gradually dissipating energy, the concentrated load at the anchoring point of the mooring cable 6 can be greatly reduced, avoiding the displacement or failure of the anchor block due to instantaneous overload, thereby further improving the long-term mooring reliability of the system in a harsh marine environment.

[0038] The energy-consuming floating ball 8 includes a central spherical body and three identical circular plates distributed around the central spherical body. The centers of the circular plates coincide with the center of the spherical body of the central spherical body, and the three circular plates are orthogonal to each other. The circular spherical body is provided with a through hole for connecting the mooring cable 6. The energy-consuming floating ball 8 is divided into two symmetric parts along the through hole, and the two parts are locked by nuts. The diameter of the through hole is slightly smaller than that of the mooring cable 6, and the inner wall of the through hole is provided with dot-shaped protrusions perpendicular to the direction of the through hole. The protrusions embed into the surface of the rope, significantly increasing the static friction force and preventing the energy-consuming floating ball 8 from sliding on the mooring cable 6; the protrusions disperse the concentrated pressure between the mooring cable 6 and the through hole to multiple contact points, reducing local wear and extending the service life of the ball and the rope. The through hole is provided with a bent section at the center of the spherical body of the circular spherical body. The bent hole channel will increase the contact points between the mooring cable 6 and the inside of the circular spherical body, generating greater friction force to further prevent the energy-consuming floating ball 8 from freely sliding on the mooring cable 6. When subjected to external forces such as loads, the bent path can absorb impact energy, reducing the transmission efficiency of vibration or impact; dispersing external loads and reducing local stress concentration, thereby improving the durability of the overall structure.

[0039] Furthermore, to improve the dynamic adaptability and overall stability of the mooring system, a distributed layout of energy-consuming floating balls 8 can be adopted on the mooring cable 6, that is, multiple energy-consuming floating balls 8 are arranged at preset intervals along the length direction of the mooring cable 6. Under the synergistic action of multiple energy-consuming floating balls 8, a segmented buoyancy support is formed, which can effectively improve the overall pre-tension level of the mooring cable 6, ensure the prestressed state of the cable net structure under all working conditions, and thus improve the morphological stability of the system under the action of environmental loads. In addition, when the water surface structure is displaced under the drive of environmental loads, the distributed energy-consuming floating balls 8 on the mooring cable 6 will be subjected to the resistance of the water body. Through the step-by-step kinetic energy dissipation mechanism of multiple energy-consuming floating balls 8, the impact energy transmitted by the waves to the water surface structure is significantly weakened.

[0040] In this solution, when constructing a large-scale floating photovoltaic array, a design strategy of reserving channels is adopted. Specifically, every two to three columns of photovoltaic units are left empty for one column to facilitate the smooth passage of catamarans on the water surface and easily shuttle between the arrays, creating convenience for daily operation and maintenance work. Staff can take the catamaran to wipe and maintain the photovoltaic panels closely and efficiently, timely remove impurities such as surface dust, stains, and seabird feces, ensure that the photovoltaic panels always maintain a high lighting efficiency, and thus guarantee the stable power generation of the entire power generation system; at the same time, this convenient channel setting also facilitates the rapid inspection of structural components. Once potential problems such as loose connections of floating units and damaged photovoltaic panels are found, measures can be taken to repair them immediately, comprehensively improving the work efficiency of later operation and maintenance, and laying a solid foundation for the long-term stable operation of large-scale floating offshore photovoltaic projects.

[0041] The specific implementation process is as follows:

[0042] The longitudinal cable 2 and the transverse cable 1 are sequentially passed through the corresponding floating units 3. Bolts are used to pass through the corresponding connection holes 7 of the floating plates, and the upper and lower floating plates are fixed together to complete the assembly of the floating unit 3 and the cable net structure. Then, the outer ends of the longitudinal cable 2 and the transverse cable 1 are passed through the corresponding holes of the buoy 4 and connected to the float 5. Then, one end of the mooring cable 6 is connected to the anchor block, and the other end of the mooring cable 6 is connected to the float 5. After all the installations are completed, the photovoltaic panels are installed on the corresponding floating units 3. The longitudinal cable 2 and the transverse cable 1 can flexibly adjust their own shapes under the action of wind and waves, effectively buffering the external impact. The floating unit 3 fixes the longitudinal cable 2 and the transverse cable 1. The buoy 4, the float 5 and the mooring cable 6 fluctuate up and down with the wind and waves. The float 5 keeps the mooring cable 6 under a certain pre-tension to adapt to the dynamic changes of the cable net structure, ensuring the stability and durability of the entire floating offshore photovoltaic in a complex marine environment.

[0043] Compared with traditional photovoltaic support systems such as truss-type and modular floating body forms with hinge connections, the construction difficulty of this solution is greatly reduced, the construction period is significantly shortened, and a large amount of labor costs and time costs are directly saved. Due to their own structural characteristics, traditional structural forms are extremely prone to problems such as component corrosion and connection loosening in the marine environment with high humidity and high salt content, and frequently fall into maintenance dilemmas, resulting in a continuous increase in the cost of subsequent maintenance and replacement. This solution relies on excellent corrosion-resistant materials (fiberglass, 316L stainless steel or anodized aluminum) and a stable and reliable connection design, greatly reducing the probability of component damage, significantly reducing the maintenance frequency, and also reducing the maintenance difficulty, highlighting the low-cost advantage and providing a solid guarantee for the long-term stable operation of the project.

[0044] The above are only embodiments of the present invention. Specific technical solutions and / or common knowledge such as characteristics that are well known in the art are not described in detail here. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several deformations and improvements can be made. In the present invention, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. The scope of protection required by this application should be based on the content of its claims, and the specific implementation manners described in the specification can be used to explain the content of the claims.

Claims

1. A cable-supported marine photovoltaic floating system, characterized in that: include: A floating unit, a cable net structure, a frame structure and a mooring structure, wherein the cable net structure comprises longitudinal cables and transverse cables, wherein the longitudinal cables and transverse cables intersect and form a grid, wherein the longitudinal cables and transverse cables intersect and are fixed inside the floating unit, wherein the outer ends of the longitudinal cables and the transverse cables are connected to the frame structure, wherein the frame structure is connected to the mooring structure, wherein the mooring structure is used to maintain the pre-tension of the transverse cables and the longitudinal cables, wherein the mooring structure is connected to an anchoring device; wherein the mooring structure comprises a float and a mooring cable, wherein the portion of the mooring cable submerged in the sea water is provided with an energy-absorbing buoy to enhance its buoyancy and movement resistance.

2. A cable-supported marine photovoltaic floating system according to claim 1, characterized in that: A cross-shaped groove is provided in the floating unit, and the transverse cable and the longitudinal cable are installed in the cross-shaped groove.

3. A cable-supported marine photovoltaic floating system according to claim 2, characterized in that: The floating unit comprises floating plates which are symmetrical in upper and lower parts, cross-shaped grooves are arranged on opposite sides of the floating plates, and the floating plates which are symmetrical in upper and lower parts are connected in a detachable manner.

4. A cable-supported marine photovoltaic floating system according to claim 3, characterized in that: The cross-shaped groove is located on the diagonal line of the floating board.

5. The cable-supported marine photovoltaic floating system according to claim 3 is characterized in that: The floating plates are symmetrical in both directions and are provided with corresponding connection holes, and the connection holes are evenly arranged on the non-cross-shaped groove parts of the floating plates.

6. The cable-supported marine photovoltaic floating system according to claim 1, characterized in that: The frame structure comprises buoys, which are arranged outside the longitudinal cables and outside the transverse cables in the extending direction, and the outer ends of the transverse cables and the longitudinal cables are both connected to corresponding buoys.

7. A cable-supported marine photovoltaic floating system according to claim 6, characterized in that: One end of the mooring cable is connected to a float, and there is at least one float. The outer ends of the transverse cable and the longitudinal cable pass through the buoy and are connected to the corresponding floats. The other end of the mooring cable is connected to an anchoring device.

8. The cable-supported marine photovoltaic floating system according to claim 7, characterized in that: The outer ends of a preset number of longitudinal cables passing through a single buoy are connected to the same float, and the outer ends of a preset number of transverse cables passing through a single buoy are connected to the same float.

9. The cable-supported marine photovoltaic floating system according to claim 6, characterized in that: The outer ends of the transverse cables are located on the buoy at equal intervals, and the outer ends of the longitudinal cables are located on the buoy at equal intervals.

10. The cable-supported marine photovoltaic floating system according to claim 1, characterized in that: The energy-consuming floating ball comprises a central sphere and three identical circular plates distributed on the periphery of the central sphere. The centers of the circular plates coincide with the center of the central sphere and the three circular plates are orthogonal to each other.

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