Offshore floating type wind-light-wave-flow combined power generation system

Abstract

The invention discloses an offshore floating type wind-light-wave-flow combined power generation system which comprises a semi-submersible type wind-wave-flow combined power generation device, a floating pipe type photovoltaic array and a connecting mooring, and the semi-submersible type wind-wave-flow combined power generation device is composed of a wind generating set, an overtopping type wave energy power generation device and an ocean current energy power generation device. The wind generating set is fixed to the overtopping wave energy power generation device, the ocean current energy power generation device is fixed to the lower portion of the overtopping wave energy power generation device, the overtopping wave energy power generation device floats on the sea surface, and the floating pipe type photovoltaic array is arranged around the semi-submersible type wind wave and current combined power generation device in the mode of floating on the sea surface. And the connecting mooring is used for mutually positioning and connecting the semi-submersible wind wave and flow combined power generation device and the floating pipe type photovoltaic array, and simultaneously positioning and connecting the semi-submersible wind wave and flow combined power generation device and the floating pipe type photovoltaic array with the seabed. Through deep coupling of wind, light and wave flows, three-dimensional utilization of sea space is achieved, and multi-energy efficient complementary power generation is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of offshore energy utilization, and relates to an offshore floating combined wind-solar-wave-current power generation system. Background Art

[0002] Wind energy, wave energy, ocean current energy, and solar energy are important sources of renewable energy. Energies such as wind, light, waves, and currents are characterized by rich resources and environmental friendliness. These technologies not only have rich resource potential and low-carbon emission characteristics, but also help improve energy security, reduce greenhouse gas emissions, promote sustainable development and environmental protection, and become an important part of the global energy transition.

[0003] However, the existing technologies generally have the following limitations:

[0004] Low utilization efficiency of single energy:

[0005] Most offshore power generation platforms only focus on a single energy source (such as wind or photovoltaic), and fail to synergistically utilize the complementary characteristics of multiple energies of wind, light, waves, and currents in the ocean, resulting in low power generation efficiency per unit sea area.

[0006] Conflicts in multi-energy integration structure:

[0007] Although existing wind-solar complementary systems combine wind turbines and photovoltaics, they do not integrate wave energy and ocean current energy, and lack spatial collaborative design, resulting in mutual shading between devices and a decrease in energy capture efficiency.

[0008] Wave energy devices (such as overtopping structures) require a stable platform to ensure the overtopping volume, while the operation of wind turbines is likely to cause platform shaking, and the dynamic characteristics contradiction between the two has not been solved.

[0009] Insufficient wave energy conversion efficiency:

[0010] The layout of the guide plates of traditional overtopping devices is extensive, the wave convergence effect is poor, and the water inlet efficiency of the storage pool is low, resulting in insufficient potential energy conversion rate.

[0011] Poor adaptability of the mooring system:

[0012] A single mooring mode is difficult to take into account the stability requirements of different devices: wind turbines need to resist overturning, wave energy devices need to limit displacement, and photovoltaic arrays need flexible buffering. The existing technology uses a unified mooring, which will cause the key components (such as the wave energy storage pool) to have a sudden reduction in overtopping volume due to excessive displacement.

[0013] In addition, the photovoltaic array is easily damaged by wave impacts. Summary of the Invention

[0014] The purpose of the present invention is to solve the problems in the background art and propose an offshore floating combined wind-solar-wave-current power generation system.

[0015] To achieve the above technical objectives, the technical solution adopted by the present invention is as follows:

[0016] An offshore floating wind-solar-wave-current combined power generation system includes a semi-submersible wind-wave-current combined power generation device, a floating tube photovoltaic array, and a connecting mooring. The semi-submersible wind-wave-current combined power generation device consists of a wind power generation unit, an overtopping wave energy power generation device, and a sea current energy power generation device. The wind power generation unit is fixed on the overtopping wave energy power generation device, and the sea current energy power generation device is fixed below the overtopping wave energy power generation device. The overtopping wave energy power generation device floats on the sea surface. The wind power generation unit is used to convert the kinetic energy of the wind into the mechanical energy of the wind turbine shaft and finally into electrical energy; the overtopping wave energy power generation device converts wave energy into the potential energy of water, then converts the potential energy of water into mechanical energy and finally into electrical energy; the sea current energy power generation device is used to convert the kinetic energy of the sea current into mechanical energy and finally into electrical energy; the floating tube photovoltaic array is arranged around the semi-submersible wind-wave-current combined power generation device in a floating manner on the sea surface. The connecting mooring is used to position and connect the semi-submersible wind-wave-current combined power generation device and the floating tube photovoltaic array to each other, and at the same time, to position and connect the semi-submersible wind-wave-current combined power generation device and the floating tube photovoltaic array to the seabed.

[0017] To optimize the above technical solution, the specific measures taken also include:

[0018] The wind power generation unit consists of wind turbine blades, a hub, a nacelle, and a tower. The wind turbine blades are connected to the hub, the hub is connected to the nacelle, the nacelle is fixed at the top of the tower, and the bottom of the tower is fixed on the overtopping wave energy power generation device.

[0019] The bottom of the tower is connected to the overtopping wave energy power generation device through six support rods, of which three are arranged in a triangular structure and parallel to the top of the overtopping wave energy power generation device, and the other three form a 60° angle with the triangular structure, with the upper ends connected to the bottom of the tower and the lower ends respectively connected to the three vertices of the triangular structure.

[0020] The overtopping wave energy power generation device consists of an axial flow water turbine, a dish-shaped power generation device, a storage pool, a water outlet pipe, and a guide plate. The dish-shaped power generation device is in the shape of a frustum of a cone as a whole. A storage pool is provided in the middle of the dish-shaped power generation device. The bottom of the storage pool is communicated with the water outlet pipe. An axial flow water turbine is provided in the water outlet pipe. The number of guide plates is several, and they are distributed on the outer surface of the dish-shaped power generation device.

[0021] Nine guide plates of the same specification are installed on the outer wall of the dish-shaped power generation device at equal arcs, and the included angle between adjacent guide plates is 40°. When the wave flows through the edge of the dish-shaped power generation device, the guide plates can change the flow direction of the wave and collect it into the storage pool located in the middle of the dish-shaped power generation device.

[0022] There are several ocean current energy power generation devices. Each ocean current energy power generation device consists of a vertical axis blade, a column, and a column foot. Two vertical axis blades are arranged parallel to each other vertically on the column. The bottom of the column is connected to the column foot, and the top of the column is connected to the bottom of the overtopping wave energy power generation device through a connecting rod. The vertical axis blades are immersed in seawater.

[0023] The floating tube type photovoltaic array consists of photovoltaic modules, module cables, anchoring columns, and floating tubes; the anchoring columns are arranged on the left and right sides of the floating tubes, the floating tubes span across the anchoring columns, both ends of the module cables are connected to the anchoring columns on the left and right sides, the floating tubes float on the sea surface, and the photovoltaic modules are fixed on the floating tubes.

[0024] The floating tube type photovoltaic array further includes component springs. Both ends of the component springs are fixed between adjacent floating tubes or between adjacent photovoltaic modules, and are used to control the distance between adjacent floating tubes or adjacent photovoltaic modules.

[0025] The connecting mooring consists of a first mooring, a second mooring, a third mooring, and a fourth mooring; the semi-submersible wind-wave-current combined power generation device is connected to the seabed through the first mooring, one corner of the floating tube type photovoltaic array is connected to the seabed through the second mooring, adjacent two floating tube type photovoltaic arrays are connected by the third mooring, and the semi-submersible wind-wave-current combined power generation device and the floating tube type photovoltaic array are connected by the fourth mooring.

[0026] The number of the first moorings is set to be multiple, and is set as a tension leg type structure with an angle with the seabed located at 80° - 90°, and the second mooring is set to have an angle of 45° with the seabed.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0028] 1. The present invention realizes multi-energy efficient complementary power generation:

[0029] Through the deep coupling of four energies of wind, light, wave, and current, the three-dimensional utilization of sea area space is realized: the wind turbine occupies the high-altitude wind domain, the floating tube type photovoltaic array covers the water surface light domain, and wave energy and ocean current energy develop the underwater energy domain; the measured total power generation is increased by more than 200% compared with the single-energy system, and the energy output rate per unit sea area significantly exceeds the traditional separate system.

[0030] 2. The wave energy power generation efficiency is breakthroughly improved:

[0031] The layout of the guide plates at a 40° angle forms a directional wave convergence channel: the overtopping volume increases, and the water inlet efficiency of the storage pool is improved; the potential energy - mechanical energy conversion rate is significantly improved, solving the core defect of low wave energy capture rate in the background technology.

[0032] 3. Co - optimization of System Stability and Reliability: The present invention adopts a hybrid mooring system. The tension - leg type No.1 mooring controls the displacement of the wave energy device within <5% of the design wave height, ensuring the stability of the over - wash volume. The 45° oblique No.2 mooring endows the photovoltaic array with flexible buffering ability, reducing the wave impact load by 40%. By setting the device spacing and elastic connection of components, the risk of array collision is significantly reduced.

[0033] 4. Structure Integration to Reduce Costs and Complexity:

[0034] The current energy device is directly installed on the column of the wave energy device, sharing the anchoring foundation, reducing the cost of independent foundations and deployment time. The six - support rods of the wind turbine are arranged at a 60° angle, enhancing the anti - overturning moment and extending the tower life.

[0035] 5. Enhanced Environmental Adaptability:

[0036] The elastic structure of the floating - tube type photovoltaic array can adapt to sea state fluctuations of level 4. The power generation stability of the semi - submersible platform reaches 95% under the condition of a wave height of 7 meters, solving the problem of dynamic interference of multiple devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is the overall front view of the offshore floating wind - solar - wave - current combined power generation system;

[0038] Figure 2 is the overall top view of the offshore floating wind - solar - wave - current combined power generation system;

[0039] Figure 3 is the partial top view of the floating - tube type photovoltaic array;

[0040] Figure 4 is the schematic diagram of the wind power generation unit;

[0041] Figure 5 is the schematic diagram of the over - wash type wave energy power generation device;

[0042] Figure 6 is the schematic diagram of the current energy power generation device;

[0043] Figure 7 is the connection schematic diagram of the wind power generation unit and the over - wash type wave energy power generation device;

[0044] Figure 8 is the connection schematic diagram of the over - wash type wave energy power generation device and the current energy power generation device.

[0045] The reference numerals are: semi-submersible combined wind-wave-current power generation device 1, wind turbine generator set 11, wind turbine blade 111, hub 112, nacelle 113, tower 114, overtopping wave energy power generation device 12, deflector 121, dish-shaped power generation device 122, water storage tank 123, water outlet pipe 124, ocean current energy power generation device 13, vertical axis blade 131, column 132, column foot 133, floating tube type photovoltaic array 2, photovoltaic module 21, module cable 22, anchoring column 23, floating tube 24, component spring 25, connecting mooring 3, first mooring 31, second mooring 32, third mooring 33, fourth mooring 34, support rod 41, connecting rod 42. Detailed implementation manners

[0046] In order to make the objectives, technical solutions and advantages of the present application clearer and more understandable, the present application will be described and explained below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.

[0047] Obviously, the accompanying drawings in the following description are only some examples or embodiments of the present application. For those of ordinary skill in the art, without making creative efforts, the present application can also be applied to other similar scenarios based on these drawings. In addition, it can also be understood that although the efforts made in this development process may be complex and lengthy, for those of ordinary skill in the art related to the content disclosed in the present application, some design, manufacturing or production changes made based on the technical content disclosed in the present application are only conventional technical means and should not be understood as the content disclosed in the present application being insufficient.

[0048] When the term "embodiment" is mentioned in the present application, it means that the specific features, structures or characteristics described in connection with the embodiment may be included in at least one embodiment of the present application. The phrase does not necessarily refer to the same embodiment at various positions in the specification, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those of ordinary skill in the art explicitly and implicitly understand that the embodiments described in the present application can be combined with other embodiments without conflict.

[0049] Unless otherwise defined, the technical terms or scientific terms involved in this application shall have the ordinary meanings understood by those with ordinary skills in the technical field to which this application belongs. The words such as "a", "an", "one kind", "the" and the like involved in this application do not indicate a limitation in quantity and may represent a singular or plural number. The terms "include", "comprise", "have" and any variations thereof involved in this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units (units) is not limited to the listed steps or units, but may further include steps or units not listed, or may further include other steps or units inherent to these processes, methods, products or devices. The similar words such as "connect", "be connected", "couple" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "plural" / "several" involved in this application refers to two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships may exist. For example, "A and / or B" may represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. The terms "first", "second", "third" and the like involved in this application are only used to distinguish similar objects and do not represent a specific order for the objects.

[0050] As Figure 1-8 shown, the system includes a semi-submersible combined wind-wave-current power generation device 1, a floating tube photovoltaic array 2, and a connection mooring 3. The semi-submersible combined wind-wave-current power generation device 1 is composed of a wind turbine generator set 11, an overtopping wave energy power generation device 12, and an ocean current energy power generation device 13. The connection mooring 33 is composed of a first mooring 31, a second mooring 32, a third mooring 33, and a fourth mooring 34. Other parts of the system also include a support rod 41 and a connecting rod 42.

[0051] The wind turbine generator set 11 consists of wind turbine blades 111, a hub 112, a nacelle 113, and a tower 114. The wind turbine blades 111 rotate under the action of wind, converting the kinetic energy of the wind into the mechanical energy of the wind turbine shaft, and ultimately into electrical energy. The overtopping wave energy power generation device 12 consists of an axial flow water turbine, a dish-shaped power generation device 122, a water outlet pipe 124, and a guide vane 121. The dish-shaped power generation device 122 is generally frustum-shaped, with a water storage tank 123 in the middle and is connected to the water outlet pipe 124 at the bottom. An axial flow water turbine is provided in the water outlet pipe 124. The working principle of the overtopping wave energy power generation device 12 is that waves converge along the ramp to the water storage tank 123 at the top after passing through the guide vane 121, converting wave energy into the potential energy of water. Subsequently, the mechanical energy of the water turbine is converted by the runner blades of the axial flow water turbine impacted by the water flow, and then into electrical energy. The ocean current energy power generation device 13 consists of vertical axis blades 131, a column 132, and a column foot 133. Two vertical axis blades 131 are arranged in parallel on the column 132, and the column 132 is connected to the column foot 133. The blades rotate under the action of the ocean current, converting the kinetic energy of the ocean current into the mechanical energy of the vertical axis, and ultimately into electrical energy. The floating tube type photovoltaic array 2 consists of photovoltaic modules 21, module cables 22, anchoring columns 23, floating tubes 24, and component springs 25;

[0052] Three ocean current energy power generation devices 13 are installed on three columns 132. The top of the column 132 is connected to the bottom end of the overtopping wave energy power generation device 12, and the column 132 is connected to the water outlet pipe 124 through a connecting rod 42. The wind turbine generator set 11 is connected to the overtopping wave energy power generation device 12 through six support rods 41, of which three are placed parallel to the bottom surface and three are at an angle of 60° to the bottom surface. Nine guide vanes 121 of the same specification are installed on the outer wall of the overtopping wave energy power generation device 12, and the included angle between adjacent two plates is 40°. When waves flow through the edge of the device, the guide vane 121 can change the flow direction of the waves, collecting them into the water storage tank 123 located in the middle of the device, greatly increasing the overtopping volume of the device and significantly improving the wave energy power generation efficiency;

[0053] The semi-submersible wind-wave-current combined power generation device 1 is connected to the seabed through a first mooring 31. One corner of the floating tube type photovoltaic array 2 is connected to the seabed through a second mooring 32. Adjacent floating tube type photovoltaic arrays 2 are connected through a third mooring 33. The semi-submersible wind-wave-current combined power generation device 1 is connected to the tube type photovoltaic array through a fourth mooring 34. To avoid collisions between the power generation devices and ensure the overtopping volume of the wave energy power generation device 12, the minimum distance between each device exceeds 100 meters. To control the displacement of the wave energy power generation device to ensure the overtopping volume of the power generation system, the first mooring 31 is set as a tension leg type close to perpendicular to the seabed. At the same time, to take into account the overall toughness of the system, the floating tube type photovoltaic array 2 is set in a form at an angle of 45° to the seabed.

[0054] Working process:

[0055] Energy capture:

[0056] When the wind speed > 5 m / s, the wind turbine blade 111 drives power generation;

[0057] When the wave height > 0.8 m, the deflector 121 guides the wave into the storage pool 123, and the water flow impacts the axial flow turbine for power generation;

[0058] When the ocean current > 0.8 m / s, the vertical axis blade 131 rotates for power generation;

[0059] When the light intensity > 500 W / m 2 , the photovoltaic module 21 outputs electric energy.

[0060] Dynamic stability control:

[0061] The wave energy device 12 reduces its displacement by 50% due to the displacement of the first mooring 31;

[0062] The photovoltaic array 2 absorbs shocks through the component spring 25, and the vibration amplitude is reduced by 40%.

[0063] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited by the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be equivalent replacement methods and are all included in the protection scope of the present invention.

Claims

1. An offshore floating combined wind-solar-wave-current power generation system, characterized in that: It includes a semi-submersible combined wind-wave-current power generation device (1), a floating tube photovoltaic array (2), and a connecting mooring (3). The semi-submersible combined wind-wave-current power generation device (1) consists of a wind turbine generator set (11), an overtopping wave energy power generation device (12), and a sea current energy power generation device (13). The wind turbine generator set (11) is fixed on the overtopping wave energy power generation device (12), and the sea current energy power generation device (13) is fixed below the overtopping wave energy power generation device (12). The overtopping wave energy power generation device (12) floats on the sea surface. The wind turbine generator set (11) is used to convert the kinetic energy of the wind into the mechanical energy of the wind turbine shaft and finally into electrical energy; the overtopping wave energy power generation device (12) converts wave energy into the potential energy of water, then converts the potential energy of water into mechanical energy and finally into electrical energy; the sea current energy power generation device (13) is used to convert the kinetic energy of the sea current into mechanical energy and finally into electrical energy; the floating tube photovoltaic array (2) is arranged around the semi-submersible combined wind-wave-current power generation device (1) in a floating manner on the sea surface, and the connecting mooring (3) is used to position and connect the semi-submersible combined wind-wave-current power generation device (1) and the floating tube photovoltaic array (2) to each other, and at the same time position and connect the semi-submersible combined wind-wave-current power generation device (1) and the floating tube photovoltaic array (2) to the seabed.

2. The offshore floating combined wind-solar-wave-current power generation system according to claim 1, characterized in that: The wind turbine generator set (11) consists of wind turbine blades (111), a hub (112), a nacelle (113), and a tower (114). The wind turbine blades (111) are connected to the hub (112), the hub (112) is connected to the nacelle (113), the nacelle (113) is fixed at the top of the tower (114), and the bottom of the tower (114) is fixed on the overtopping wave energy power generation device (12).

3. The offshore floating combined wind-solar-wave-current power generation system according to claim 2, wherein: The bottom of the tower (114) is connected to the overtopping wave energy power generation device (12) through six support rods (41). Among them, three are placed in a triangular structure parallel to the top of the overtopping wave energy power generation device (12), and the other three form a 60° angle with the triangular structure, with the upper ends connected to the bottom of the tower (114) and the lower ends respectively connected to the three vertices of the triangular structure.

4. The offshore floating combined wind-solar-wave-current power generation system according to claim 3, wherein: The overtopping wave energy power generation device (12) consists of an axial flow water turbine, a dish-shaped power generation device (122), a storage pool (123), a water outlet pipe (124), and a guide vane (121). The dish-shaped power generation device (122) is in an overall frustum shape. A storage pool (123) is provided in the middle of the dish-shaped power generation device (122). The bottom of the storage pool (123) is communicated with the water outlet pipe (124). An axial flow water turbine is provided in the water outlet pipe (124). The number of guide vanes (121) is several, and they are distributed on the outer surface of the dish-shaped power generation device (122).

5. The offshore floating combined wind-solar-wave-current power generation system according to claim 4, wherein: Nine guide vanes (121) of the same specification are installed on the outer wall of the dish-shaped power generation device (122) at equal arcs, and the included angle between adjacent guide vanes (121) is 40°. When the wave flows through the edge of the dish-shaped power generation device (122), the guide vanes (121) can change the flow direction of the wave and collect it into the storage pool (123) located in the middle of the dish-shaped power generation device (122).

6. The offshore floating wind-solar-wave-current combined power generation system according to claim 5 is characterized by: The number of the aforesaid ocean current energy power generation devices (13) is several. Each ocean current energy power generation device (13) is composed of a vertical axis blade (131), a column (132) and a column foot (133). Two vertical axis blades (131) are arranged in parallel up and down on the column (132). The bottom of the column (132) is connected to the column foot (133). The top of the column (132) is connected to the bottom of the overtopping wave energy power generation device (12) through a connecting rod (42). The vertical axis blade (131) is immersed in seawater.

7. The offshore floating combined wind-solar-wave-current power generation system according to claim 6, characterized in that: The aforesaid floating tube type photovoltaic array (2) is composed of a photovoltaic module (21), a module cable (22), an anchoring column (23) and a floating tube (24). The anchoring columns (23) are arranged on the left and right sides of the floating tube (24). The floating tube (24) straddles the anchoring columns (23). Two ends of the module cable (22) are connected to the anchoring columns (23) on the left and right sides. The floating tube (24) floats on the sea surface. The photovoltaic module (21) is fixed on the floating tube (24).

8. The offshore floating combined wind-solar-wave-current power generation system according to claim 7, characterized in that: The aforesaid floating tube type photovoltaic array (2) further includes a component spring (25). Two ends of the component spring (25) are fixed between adjacent floating tubes (24) or between adjacent photovoltaic modules (21) for controlling the distance between adjacent floating tubes (24) or adjacent photovoltaic modules (21).

9. The offshore floating combined wind-solar-wave-current power generation system according to claim 1, characterized in that: The aforesaid connecting mooring (3) is composed of a first mooring (31), a second mooring (32), a third mooring (33) and a fourth mooring (34). The semi-submersible wind-wave-current combined power generation device (1) is connected to the seabed through the first mooring (31). One corner of the floating tube type photovoltaic array (2) is connected to the seabed through the second mooring (32). Adjacent two floating tube type photovoltaic arrays (2) are connected through the third mooring (33). The semi-submersible wind-wave-current combined power generation device (1) and the floating tube type photovoltaic array (2) are connected through the fourth mooring (34).

10. The offshore floating wind-solar-wave-current combined power generation system according to claim 9, characterized in that: The number of the first moorings (31) is set to be multiple, and is set to be a tension leg type structure with an angle with the seabed between 80° and 90°. The second mooring (32) is set to have an angle of 45° with the seabed.

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