A marine power plant

Abstract

The application discloses a marine power generation device, relates to the technical field of marine energy utilization, and comprises a floating platform, a water turbine, a first generator, a plurality of air turbines and a plurality of second generators. The floating platform is provided with a water storage pool, a wave leading surface and a plurality of pneumatic chambers. The wave leading surface is used for guiding seawater to climb into the water storage pool. The water storage pool is provided with a water outlet, and the water outlet can drive the water turbine to rotate and in turn drive the first generator to generate power, thereby forming an overtopping wave energy power generation device. The pneumatic chambers can generate reciprocating airflow under the action of waves. The air turbines can rotate in the same direction under the drive of the reciprocating airflow in the pneumatic chambers and in turn drive the second generators to generate power, thereby forming an oscillating water column wave energy power generation device. The marine power generation device is designed by integrating the overtopping wave energy power generation device and the oscillating water column wave energy power generation device, and effectively solves the problems of the single device in the prior art which cannot cover wide-spectrum wave energy and the space utilization conflict caused by the integration of multiple devices.

Description

Technical Field

[0001] This application relates to the field of marine energy utilization technology, and more specifically, to a marine power generation device. Background Technology

[0002] Developing offshore renewable energy is a crucial direction for addressing the energy crisis. Wave energy and wind energy, due to their abundant resources, wide distribution, and strong correlation, are key targets for simultaneous development. Current wave power generation devices mainly include overflying and oscillating water column types. Overflying devices typically use wave guides to converge waves into a water tank, driving a turbine to generate electricity through the water level difference. This method excels at capturing the potential energy of low-frequency, large waves, but has lower energy conversion efficiency for high-frequency, small waves. Oscillating water column devices utilize the rising and falling of a water column within a sealed pneumatic chamber to compress air, driving a pneumatic turbine to generate electricity. While this method excels at capturing the kinetic energy of high-frequency waves, it often requires a separate pneumatic chamber structure, occupying a significant amount of space. Installing only one of these devices cannot effectively cover a wide spectrum of wave energy; installing both simultaneously can easily lead to conflicts in space utilization, requiring additional sea area, complicating mooring systems, and drastically increasing construction costs.

[0003] Therefore, how to control construction costs while balancing the efficient capture of wave energy across a wide spectrum and the compactness of device integration has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide an offshore power generation device that controls construction costs while taking into account both the efficient capture of wave energy across a wide spectrum and the compactness of device integration.

[0005] An offshore power generation device, comprising:

[0006] A floating platform is provided, comprising a water storage tank, a wave-guiding surface, and multiple pneumatic chambers. The top of the water storage tank is provided with a water inlet, and the bottom of the water storage tank is provided with a drainage channel. The wave-guiding surface is used to guide seawater flow to the water inlet, and the drainage channel is used to connect with the sea area. The pneumatic chambers are arranged circumferentially around the water storage tank, and the top of each pneumatic chamber is provided with a ventilation channel connecting the pneumatic chamber to the outside. The bottom of each pneumatic chamber is provided with a bottom opening for connecting with the sea area, and the pneumatic chamber is used to generate reciprocating airflow under the action of waves.

[0007] A water turbine and a first generator are provided. The water turbine is installed in the drainage channel and is used to rotate under the action of seawater discharged from the reservoir. The first generator is driven to the water turbine and is used to convert the mechanical energy generated by the rotation of the water turbine into electrical energy.

[0008] The system includes multiple gas turbines and multiple second generators. Each gas turbine is installed in a corresponding air exchange channel within a pneumatic chamber and is used to rotate in the same direction under the drive of the reciprocating airflow. Each second generator is connected to a corresponding gas turbine and is used to convert the mechanical energy generated by the rotation of the gas turbine into electrical energy.

[0009] In some embodiments, the floating platform is a frustum structure, and the outer diameter of the floating platform gradually decreases from bottom to top, with the circumferential outer wall of the floating platform serving as the wave-guiding surface;

[0010] Multiple wave guides are provided on the wave-inducing surface. The wave guides extend from the bottom to the top of the floating platform and are arranged circumferentially around the floating platform. A flow guiding zone is formed between two adjacent wave guides, and each flow guiding zone is used to guide the waves to the inlet.

[0011] In some embodiments, the ventilation channel has a first ventilation end and a second ventilation end arranged opposite to each other, the first ventilation end being located at the bottom of the ventilation channel and communicating with the pneumatic chamber, and the second ventilation end being located at the top of the ventilation channel and communicating with the outside.

[0012] Each of the ventilation channels has a wave-blocking component installed outside the second ventilation end. The wave-blocking component connects the second ventilation end of the ventilation channel to the outside world and is used to block the flow of waves into the ventilation channel.

[0013] In some embodiments, the wave guide plate and the wave-blocking component are respectively arranged in a one-to-one correspondence, and the wave-blocking component includes:

[0014] First side baffle and second side baffle, both the first side baffle and the second side baffle are disposed on the top of the floating platform and are arranged around the circumference of the floating platform. The first side baffle, the second ventilation end of the ventilation channel and the second side baffle are arranged in sequence.

[0015] A first guide plate and a second guide plate are both disposed on the top of the floating platform, with the first guide plate connected between the wave guide plate and the first side baffle, and the second guide plate connected between the wave guide plate and the second side baffle.

[0016] In some embodiments, the wave-blocking assembly includes a booster tube, with a first axial end of the booster tube disposed on the top of the floating platform and communicating with a second ventilation end of the ventilation channel, and the second axial end of the booster tube extending away from the floating platform.

[0017] Alternatively, the wave-blocking assembly includes a side drain pipe, with the first axial end of the side drain pipe disposed on the top of the floating platform and connected to the second ventilation end of the ventilation channel, and the second axial end of the side drain pipe extending in the direction of the water storage tank.

[0018] In some embodiments, an oscillation chamber is provided around the drainage channel within the floating platform, and a plurality of partition plates are provided within the oscillation chamber. The partition plates are arranged circumferentially around the drainage channel and divide the oscillation chamber into a plurality of pneumatic chambers.

[0019] The ventilation channels of each of the pneumatic chambers are arranged circumferentially around the water storage tank.

[0020] In some embodiments, the wave-guiding surface is provided with a stepped structure.

[0021] In some embodiments, the offshore power generation unit further includes a wind power system, the wind power system comprising:

[0022] The wind turbine tower, the bottom of which is installed on top of the floating platform via a guide frame;

[0023] A wind turbine generator set, wherein the wind turbine generator set is installed on top of the wind turbine tower.

[0024] In some embodiments, the floating platform is fixed at a predetermined sea area location by a mooring system, the mooring system including an anchor and a mooring cable connected to the anchor, the mooring cable including at least one of a rope, anchor chain, steel cable and synthetic fiber cable.

[0025] In some embodiments, the floating platform is provided with a ballast tank, which is used to control the stability and buoyancy of the floating platform by adjusting the distribution of ballast water.

[0026] The offshore power generation device provided in this application includes a floating platform, a water turbine, a first generator, multiple gas turbines, and multiple second generators. The floating platform is used to suspend on the sea surface and serves as the mounting foundation for the water turbine, the first generator, the gas turbines, and the second generators. The floating platform is equipped with a water storage tank, a wave-guiding surface, and multiple pneumatic chambers. The top of the water storage tank has an inlet. The wave-guiding surface is positioned facing the sea area to guide seawater to rise and enter the water storage tank through the inlet. The water storage tank receives seawater entering through overtopping waves and accumulates gravitational potential energy. The bottom of the water storage tank has a drainage channel that connects to the sea area. The water turbine is located within the drainage channel and rotates using the potential energy difference between the water storage tank and the sea area. The first generator is driven by the water turbine and converts the mechanical energy generated by the turbine's rotation into electrical energy. In other words, after guiding waves into the water storage tank through the wave-guiding surface, unstable wave energy can be converted into stable potential energy. The head difference then drives the water turbine and the first generator to generate electricity, forming an overtopping wave energy power generation device. Each pneumatic chamber is arranged circumferentially around the reservoir, with a ventilation channel at the top of each chamber connecting it to the outside. A bottom opening at the bottom connects the chamber to the sea, allowing the chamber to generate reciprocating airflow under wave action. A gas turbine is installed in the ventilation channel of each chamber and rotates in the same direction driven by the reciprocating airflow. A second generator is connected to each gas turbine and converts the mechanical energy generated by the turbine's rotation into electrical energy. In other words, the fluctuation of the water surface within the pneumatic chamber triggers airflow, and the pressure difference between the chamber and the outside drives the turbine to capture high-frequency wave energy, forming an oscillating water column wave energy power generation device.

[0027] Compared to related technologies, the offshore power generation device provided in this application effectively solves the problems of single devices being unable to cover a wide spectrum of wave energy and space utilization conflicts caused by the integration of multiple devices in the prior art by integrating a wave-overtaking wave energy generation device and an oscillating water column wave energy generation device. Specifically, this application utilizes the potential energy capture advantage of the wave-overtaking wave energy generation device for low-frequency large waves, combined with the kinetic energy capture advantage of the oscillating water column wave energy generation device for high-frequency waves, to achieve complementarity between the two in terms of wide spectrum wave energy, significantly improving the overall wave energy capture efficiency. At the same time, the wave-overtaking wave energy generation device and the oscillating water column wave energy generation device share a floating platform, avoiding the space occupation and structural redundancy caused by independent arrangement. Furthermore, while simplifying the mooring system, reducing construction costs and marine resource occupation, the hybrid power generation characteristics smooth the power output and enhance adaptability to different sea conditions, thereby achieving a dual improvement in power generation performance and economic benefits. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the overall structure of the first type of offshore power generation device disclosed in the embodiments of this application;

[0030] Figure 2 This is a cross-sectional view of the first type of offshore power generation device disclosed in the embodiments of this application;

[0031] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0032] Figure 4 This is a schematic diagram illustrating the power generation principle of the first type of offshore power generation device disclosed in this application.

[0033] Figure 5 This is a bottom view of the first type of offshore power generation device disclosed in the embodiments of this application;

[0034] Figure 6 This is a top view of the second type of offshore power generation device disclosed in the embodiments of this application;

[0035] Figure 7 This is a top view of the third type of offshore power generation device disclosed in the embodiments of this application;

[0036] Figure 8 This is a front view of the third type of offshore power generation device disclosed in the embodiments of this application.

[0037] Among them, 100 is a floating platform, 110 is a water storage tank, 111 is a water inlet, 112 is a drainage channel, 120 is a wave-guiding surface, 130 is a pneumatic chamber, 131 is a ventilation channel, 132 is a bottom opening, 140 is a wave guide plate, 150 is a wave-blocking assembly, 151 is a first side baffle, 152 is a second side baffle, 153 is a first guide plate, 154 is a second guide plate, 155 is a booster pipe, 156 is a side drain pipe, and 160 is a partition plate;

[0038] 200 is a water turbine;

[0039] 300 is a gas turbine;

[0040] 400 is the wind power system, 410 is the jacket foundation, 420 is the wind turbine tower, and 430 is the wind turbine generator.

[0041] 500 is the mooring system. Detailed Implementation

[0042] This application discloses an offshore power generation device that controls construction costs while balancing the efficient capture of wave energy across a wide spectrum and the compactness of the device integration.

[0043] The embodiments will now be described with reference to the accompanying drawings. Furthermore, the embodiments shown below do not limit the scope of the invention as described in the claims. Additionally, the complete contents of the structures represented in the embodiments below are not limited to those necessary for the solution of the invention as described in the claims. It should be noted that, for ease of description, only the parts relevant to the invention are shown in the drawings. Unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0044] Developing offshore renewable energy is a crucial way to address the energy crisis. Wave energy and wind energy, due to their abundant resources, wide distribution, and high correlation, are ideal choices for co-development. Current wave energy generation devices come in various forms. Overriding wave energy generation devices utilize water level differences to drive turbines, which are adept at utilizing the potential energy of low-frequency, large waves but struggle to efficiently convert the energy of high-frequency, small waves. Oscillating water column wave energy generation devices rely on gas turbines and excel at capturing the kinetic energy of high-frequency waves, but are limited by their independent aerodynamic chamber structure, resulting in large size and significant space requirements. Furthermore, with the deepening development of deep-sea wind energy, semi-submersible and other floating wind turbines have become mainstream, but the space beneath their support platforms is often left unused. While existing technologies aim to integrate wind turbines with wave energy devices, they face significant technical bottlenecks: a single power generation mode cannot accommodate waves of different frequencies, resulting in a narrow energy capture bandwidth; and simultaneously deploying multiple devices easily leads to spatial conflicts, forcing increased sea area occupation, increasing mooring difficulty, and consequently, significantly increasing construction costs.

[0045] Based on this, this application discloses a marine power generation device to solve the problems of the single wave energy capture spectrum, conflict in space utilization for device integration, and high construction costs.

[0046] Combination Figure 1 , Figure 2 and Figure 5 The offshore power generation device disclosed in this application includes a floating platform 100, a water turbine 200, a first generator, multiple gas turbines 300 and multiple second generators. The floating platform 100 is used to float on the sea surface and serves as the mounting base for the water turbine 200, the first generator, the gas turbines 300 and the second generators. The floating platform 100 is provided with a water storage tank 110, a wave-guiding surface 120 and multiple pneumatic chambers 130.

[0047] The reservoir 110 has an inlet 111 at its top and a wave-guiding surface 120 facing the sea to guide seawater to rise and enter the reservoir 110 through the inlet 111. The reservoir 110 receives seawater entering through the waves and accumulates gravitational potential energy. The bottom of the reservoir 110 has a drainage channel 112 for connecting to the sea. The turbine 200 is located in the drainage channel 112 and rotates using the potential energy difference between the reservoir 110 and the sea. The first generator is connected to the turbine 200 and converts the mechanical energy generated by the turbine 200 into electrical energy. In other words, after the waves are guided into the reservoir 110 by the wave-guiding surface 120, the unstable wave energy can be converted into stable potential energy. The head difference is then used to drive the turbine 200 and the first generator to generate electricity, forming a wave-guiding wave energy power generation device. The head difference refers to the height difference between the water level of the reservoir 110 and the water level of the external sea area. The greater the head difference, the higher the potential energy of the water.

[0048] Each pneumatic chamber 130 is arranged circumferentially around the water storage tank 110, and the top of each pneumatic chamber 130 is provided with an air exchange channel 131 that connects the pneumatic chamber 130 to the outside. The bottom of each pneumatic chamber 130 is provided with a bottom opening 132 for connecting to the sea area, so that the pneumatic chamber 130 can generate reciprocating airflow under the action of waves. Each gas turbine 300 is correspondingly installed in the air exchange channel 131 of each pneumatic chamber 130 and can rotate in the same direction under the drive of the reciprocating airflow in the pneumatic chamber 130. The second generator is connected to the gas turbine 300 in a corresponding transmission and is used to convert the mechanical energy generated by the rotation of the gas turbine 300 into electrical energy. That is, the fluctuation of the water surface in the pneumatic chamber 130 can trigger the flow of air in the pneumatic chamber 130, and then the gas turbine 300 can be driven by the air pressure difference between the pneumatic chamber 130 and the outside to capture high-frequency wave energy, forming an oscillating water column type wave energy power generation device.

[0049] In a specific power generation process, combined with Figure 4When the waves reach the floating platform 100, some of the wave water rises under the guidance of the wave-guiding surface 120, passes over the top of the floating platform 100, and enters the reservoir 110 through the inlet 111, thus creating a head difference. This part of the water then flows into the drainage channel 112 and impacts the blades of the turbine 200, causing it to rotate, thereby converting potential energy into mechanical energy, which is then converted into electrical energy by the first generator. At the same time, with the rise and fall of the waves, the water surface in the pneumatic chamber 130 fluctuates up and down. When the water surface rises, it compresses the air in the upper part of the pneumatic chamber 130, forcing the air to be discharged at high speed through the ventilation channel 131 and driving the turbine 300. When the water surface falls, a negative pressure is formed in the pneumatic chamber 130, thereby drawing in external air and driving the turbine 300 again. Regardless of the airflow direction, the blades of the turbine 300 always rotate in the same direction, thus converting the kinetic energy of the waves into continuous mechanical energy through a pneumatic means, which is then converted into electrical energy by the second generator.

[0050] Specifically, the gas turbine 300 can be a bidirectional reciprocating aerodynamic turbine, so that its blades can rotate in the same direction under the action of airflow on both sides. In addition, it should be noted that although the water storage tank 110 and each aerodynamic chamber 130 are connected to the outside world and the sea, they are isolated inside the floating platform 100 to avoid interference.

[0051] Compared to related technologies, the marine power generation device disclosed in this application integrates a wave-powered overriding device and an oscillating water column wave-powered device, effectively solving the problems of single devices being unable to cover a wide spectrum of wave energy and space utilization conflicts caused by the integration of multiple devices in the prior art. Specifically, this application utilizes the potential energy capture advantage of the overriding wave-powered device for low-frequency large waves, combined with the kinetic energy capture advantage of the oscillating water column wave-powered device for high-frequency waves, to achieve complementarity between the two in terms of wide spectrum wave energy, significantly improving the overall wave energy capture efficiency. At the same time, the overriding wave-powered device and the oscillating water column wave-powered device share a floating platform 100, avoiding the space occupation and structural redundancy caused by independent arrangement. Furthermore, while simplifying the mooring system 500, reducing construction costs and marine resource occupation, the hybrid power generation characteristics smooth power output and enhance adaptability to different sea conditions, thereby achieving a dual improvement in power generation performance and economic benefits.

[0052] Specifically, the aforementioned floating platform 100 is a semi-submersible platform. The semi-submersible platform provides the main buoyancy through the submerged floating body, which significantly reduces the draft and wind-receiving area while ensuring stability. This reduces the swaying amplitude caused by wind and waves, allowing the wave-guiding surface 120 to always maintain a better incident angle. Ultimately, it achieves stable and efficient capture of wave energy and conversion into water potential energy under complex sea conditions.

[0053] The angle between the wave-guiding surface 120 and the horizontal plane can be 30°~45°. This angle range can effectively reduce the backflow and impact force during the wave climbing process, and ensure that a large amount of wave water enters the reservoir 110 smoothly, thereby maximizing the wave overtaking efficiency.

[0054] Furthermore, in order to slow down the backflow speed of the wave-inducing water as it rises along the wave-inducing surface 120 and prolong the residence time of the water on the slope, a stepped structure is provided on the wave-inducing surface 120. This allows the vortex effect generated by the stepped structure to dissipate part of the wave's kinetic energy, thereby preventing the water from falling back too quickly. At the same time, it can increase the disturbance to the water and increase the amount of overtopping, ensuring that the wave-inducing water can more stably and efficiently overtopping into the reservoir 110, thereby improving the efficiency of wave energy capture.

[0055] To improve reliability under extreme sea conditions, offshore power generation units can adopt functional redundancy and safety protection designs. Specifically, the gas turbine 300 can adopt a dual-rotor structure for functional redundancy, so that when one rotor fails, the other rotor can still maintain normal operation. A bypass pressure relief valve is installed at the inlet of the turbine 200 in the drainage channel 112. When extreme sea conditions cause a sudden increase in the amount of overflight or a sharp change in the flow velocity in the drainage channel 112, the bypass pressure relief valve can instantly relieve the sudden high pressure, effectively eliminating the impact of water hammer effect on the turbine 200 blades, thereby protecting the core components.

[0056] Both the water turbine 200 and the gas turbine 300 can be fixed by means of bolt connection, while the first generator and the water turbine 200 are directly connected coaxially and are installed together in the drainage channel 112, and the second generator and the gas turbine 300 are directly connected coaxially and are installed together in the ventilation channel 131.

[0057] Combination Figure 1 and Figure 2In some embodiments disclosed in this application, the floating platform 100 has a frustum structure, and the outer diameter of the floating platform 100 gradually decreases from bottom to top. The circumferential outer wall of the floating platform 100 can serve as the aforementioned wave-guiding surface 120 and form a dish-shaped wave-overtaking power generation device. Multiple wave guide plates 140 are provided on the wave-guiding surface 120. The wave guide plates 140 extend from the bottom to the top of the floating platform 100, and each wave guide plate 140 is arranged circumferentially around the floating platform 100 at intervals, forming a flow guiding area between two adjacent wave guide plates 140. Each flow guiding area is used to guide waves to the inlet 111. The wave guide plate 140 has a converging and rectifying function. It guides incident waves into the inlet 111 and corrects their propagation direction, reducing energy dissipation caused by lateral diffusion or oblique incidence, thus ensuring an effective amount of wave crossing into the reservoir 110. Simultaneously, the wave guide plate 140 reduces the lateral impact of oblique waves on the floating platform 100, improving the stress state of the floating platform 100 under complex sea conditions. This enhances wave energy capture efficiency while improving the overall stability and safety of the offshore power generation device. Specifically, the wave guide plate 140 and the wave-guiding surface 120 can be fixed by welding, bolting, or other methods; this application does not limit this.

[0058] The aforementioned ventilation channel 131 has a first ventilation end and a second ventilation end arranged opposite to each other. The first ventilation end is located at the bottom of the ventilation channel 131 and communicates with the pneumatic chamber 130, while the second ventilation end is located at the top of the ventilation channel 131 and communicates with the outside. Since both the ventilation channel 131 and the water storage tank 110 are located at the top of the floating platform 100, to avoid interference between the ventilation of the ventilation channel 131 and the waves guided by the wave-guiding surface 120, in combination with… Figure 2 and Figure 3 A wave-blocking component 150 is installed outside the second ventilation end of each ventilation channel 131. The wave-blocking component 150 can connect the second ventilation end of the ventilation channel 131 with the outside world and prevent the rising waves from entering the pneumatic chamber 130, thereby ensuring the independent operation of the wave-overtaking wave energy power generation device and the oscillating water column wave energy power generation device.

[0059] Specifically, in some embodiments disclosed in this application, combined with Figure 2 and Figure 3The wave guide plate 140 and the wave-blocking assembly 150 are respectively arranged one-to-one. The wave-blocking assembly 150 includes a first side baffle 151, a second side baffle 152, a first guide plate 153, and a second guide plate 154. The first side baffle 151, the second side baffle 152, the first guide plate 153, and the second guide plate 154 are all set on the top of the floating platform 100 by welding, screwing, or other methods, and are arranged around the circumference of the floating platform 100. The first side baffle 151 and the second guide plate 154 of the ventilation channel 131 are respectively arranged on the top of the floating platform 100. The ventilation end and the second side baffle 152 are arranged sequentially. The first guide plate 153 is connected between the wave guide plate 140 and the first side baffle 151, and the second guide plate 154 is connected between the wave guide plate 140 and the second side baffle 152. The waves guided by the wave-guiding surface 120 flow sequentially along the wave guide plate 140, the first guide plate 153 and the first side baffle 151 to the inlet 111, or sequentially along the wave guide plate 140, the second guide plate 154 and the second side baffle 152 to the inlet 111. The first side baffle 151, the second side baffle 152, the first guide plate 153 and the second guide plate 154 can all be plate-shaped structures, facilitating production and manufacturing. The wave-blocking component 150 disclosed in this embodiment has a simple structure, can coordinate the oscillating airflow path and the overtopping water flow path, and also has a wave-rectifying effect.

[0060] In other embodiments, combined with Figure 6 The wave-blocking assembly 150 includes a booster pipe 155. The first axial end of the booster pipe 155 is disposed on the top of the floating platform 100 and communicates with the second ventilation end of the ventilation channel 131. The second axial end of the booster pipe 155 extends away from the floating platform 100. In this embodiment, the booster pipe 155 can increase the actual exhaust height of the ventilation channel 131, thereby reducing the risk of waves entering the ventilation channel 131.

[0061] In some other embodiments, combined with Figure 7 and Figure 8 The wave-blocking assembly 150 includes a side drain pipe 156. The first axial end of the side drain pipe 156 is located on the top of the floating platform 100 and is connected to the second ventilation end of the ventilation channel 131. The second axial end of the side drain pipe 156 extends in the direction of the water storage tank 110, so that the side drain pipe 156 and the external ventilation position are arranged opposite to the direction of the incoming waves, thereby effectively reducing the probability of waves entering the ventilation channel 131.

[0062] The cross-sectional shape of the aforementioned booster pipe 155 and side drain pipe 156 can be circular, rectangular, etc., and they are fixed to the top of the floating platform 100 by welding, bolting, or other methods. This application does not impose any restrictions on this.

[0063] The aforementioned pneumatic chamber 130 can be directly formed inside the floating platform 100, or, in combination with... Figure 5An oscillation chamber is provided within the floating platform 100, surrounding a drainage channel 112. Multiple partition plates 160 are arranged circumferentially around the drainage channel 112 within the oscillation chamber, dividing the oscillation chamber into multiple pneumatic chambers 130. Correspondingly, the ventilation channels 131 of each pneumatic chamber 130 are also arranged circumferentially around the water storage tank 110. This embodiment integrates an oscillating water column wave energy generation device within the floating platform 100 by providing partition plates 160 within the oscillation chamber. Specifically, the partition plates 160 can be made of corrugated steel plate welded structure to utilize the geometric advantages of the corrugated shape to improve its bending stiffness and load-bearing capacity, effectively resist deformation caused by external water pressure, and simultaneously enhance the rigidity of the floating platform 100. For example, Figure 5 The paper illustrates a technical solution in which four pneumatic chambers 130 are formed by four partition plates 160 within an oscillation cavity. The number of pneumatic chambers 130 can also be three or other, and can be adjusted according to the actual working conditions. The size of each pneumatic chamber 130 can be the same or different, and can be adjusted according to the wave frequency of the corresponding sea area to ensure the bandwidth of the water resonant frequency within the pneumatic chamber 130, thereby increasing the energy harvesting efficiency.

[0064] In some embodiments disclosed in this application, in order to achieve the synergistic and complementary utilization of wind energy and wave energy, combined with Figure 1 The offshore power generation device also includes a wind power system 400, which includes a wind turbine tower 420 and a wind turbine generator 430. The wind turbine tower 420 is located at the top center of the floating platform 100, and the wind turbine generator 430 is located at the top of the wind turbine tower 420. It can use wind power to drive the rotor to rotate, thereby converting wind energy into mechanical energy and further into electrical energy, thus realizing power generation. The bottom of the wind turbine tower 420 can be connected to the truss-structured jacket 410 via a flange. The jacket 410 can be welded and fixed to the floating platform 100, thereby providing stable support for the wind turbine tower 420 and improving its anti-overturning ability. The type of wind turbine 430 is not limited to conventional horizontal axis wind turbines, but can also be a vertical axis wind turbine to adapt to different wind direction environments. In this embodiment, the wind power system 400 can make full use of the space resources at the top of the floating platform 100 and the high-altitude high-quality wind energy, thereby realizing the intensive development of multiple marine renewable energy sources on the same device. At the same time, the jacket 410 enhances the overall structural rigidity of the wind power system 400, which can effectively resist the superimposed impact of sea wind and wave loads and improve the comprehensive power generation efficiency and economic benefits of the offshore power generation device.

[0065] The aforementioned floating platform 100 can be fixed in a predetermined sea area by a mooring system 500. The mooring system 500 may include an anchor and mooring cables connecting the anchor and the floating platform 100. The mooring cables can be at least one of ropes, anchor chains, steel cables, and synthetic fiber cables, and their quantity can be flexibly configured according to environmental load requirements. The arrangement of the mooring cables can be tensioned, semi-tensioned, or catenary type; this application does not impose any limitations on this. For example, the mooring system 500 can achieve the positioning of the floating platform 100 by connecting seabed anchor piles with anchors symmetrically arranged at the four corners, enabling it to safely withstand environmental loads such as wind, waves, and currents, and realizing the fixed-point utilization of the wind-wave integrated system in the sea area.

[0066] In some embodiments, the mooring cable is a hybrid of a polymer polyester cable and an anchor chain, and a tension sensor is installed at the end of the mooring cable in conjunction with an automatic winch, thereby forming an active positioning system. This positioning system can monitor marine environmental loads in real time and dynamically adjust the mooring stiffness and cable tension through the automatic winch, thereby adapting to the instantaneous changes in wind, waves and currents, effectively buffering the damage of extreme impacts to the floating platform 100, and ensuring the operational stability and structural safety of the offshore power generation unit under complex sea conditions.

[0067] The internal wiring of the floating platform 100 is laid along its structural frame, and the cables and mooring cables can be fixed by binding. This utilizes the relative stability of the mooring cables to limit the violent swaying of the cables in the water, reduce cable wear and fatigue damage caused by long-term water flow impact, and extend their service life.

[0068] The offshore power generation device disclosed in this application has flexible scalability. The size of the floating platform 100, the power of the water turbine 200, the power of the gas turbine 300, the power of the wind turbine 430, and the number of mooring cables can all be adjusted according to actual needs, and can be further expanded into a multi-platform array wind farm. Adjacent floating platforms 100 can be interconnected through shared mooring cables, and a centralized energy storage platform can be deployed in the central area of ​​the wind farm to form a large-scale renewable energy base. In this way, the cost per unit is reduced by sharing mooring infrastructure, thereby improving the intensification and comprehensive economic benefits of marine energy development.

[0069] In some embodiments, the floating platform 100 is provided with a ballast tank, which has multiple independent watertight compartments and supporting injection and drainage pipelines. The injection and drainage pipelines can be used to adjust the injection and discharge of ballast water in each watertight compartment, thereby enabling precise control of the floating state and stability height of the floating platform 100. This balances the center of gravity shift caused by the tall structure of the wind turbine 430 and the load fluctuations during the operation of the wave energy device. It can also optimize the attitude of the floating platform 100 according to the real-time sea conditions to reduce resistance, thereby improving the anti-overturning capability and operational safety of the offshore power generation device in complex marine environments.

[0070] The offshore power generation device disclosed in this application integrates a wave-powered overtaking wave energy generator, an oscillating water column wave energy generator, and a wind turbine generator in a highly efficient manner. This breaks through the efficiency bottleneck of a single energy conversion method and solves the defects of traditional multi-energy complementary systems, such as large marine space occupation, poor structural coordination, and high cost caused by the dispersed layout of equipment. It realizes the intensive utilization and shared support of marine space resources. At the same time, by utilizing the complementary characteristics of the spatiotemporal distribution of wind energy and wave energy, it can smooth out output fluctuations and improve the stability of energy supply.

[0071] The terms "first" and "second," etc., used in the specification and claims of this application are used to distinguish different objects, not to describe a specific order, and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units may include steps or units not listed, but rather steps or units not listed. Additionally, in the description of embodiments in this application, "a plurality of" means two or more.

[0072] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Specific technical means in some embodiments may be incorporated, in whole or in part, into another embodiment unless explicitly excluded by another embodiment. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An offshore power generation device, characterized in that, include: A floating platform (100) is provided with a water storage tank (110), a wave-guiding surface (120), and multiple pneumatic chambers (130). The top of the water storage tank (110) is provided with a water inlet (111), and the bottom of the water storage tank (110) is provided with a drainage channel (112). The wave-guiding surface (120) is used to guide seawater to the water inlet (111), and the drainage channel (112) is used to connect with the sea area. Each of the pneumatic chambers (130) is arranged circumferentially around the water storage tank (110). The top of each pneumatic chamber (130) is provided with a ventilation channel (131) connecting the pneumatic chamber (130) with the outside. The bottom of each pneumatic chamber (130) is provided with a bottom opening (132) for connecting with the sea area. The pneumatic chamber (130) is used to generate reciprocating airflow under the action of waves. A water turbine (200) and a first generator are provided. The water turbine (200) is located in the drainage channel (112) and is used to rotate under the action of seawater discharged from the reservoir (110). The first generator is connected to the water turbine (200) and is used to convert the mechanical energy generated by the rotation of the water turbine (200) into electrical energy. Multiple gas turbines (300) and multiple second generators are provided. Each gas turbine (300) is installed in the ventilation channel (131) of each of the pneumatic chambers (130) and is used to rotate in the same direction under the drive of the reciprocating airflow. The second generators are connected to the gas turbines (300) in a corresponding transmission and are used to convert the mechanical energy generated by the rotation of the gas turbines (300) into electrical energy.

2. The offshore power generation device as described in claim 1, characterized in that, The floating platform (100) has a frustum structure, and the outer diameter of the floating platform (100) gradually decreases from bottom to top. The circumferential outer wall of the floating platform (100) serves as the wave-guiding surface (120). Multiple wave guides (140) are provided on the wave-guiding surface (120). The wave guides (140) extend from the bottom to the top of the floating platform (100), and each wave guide (140) is arranged circumferentially around the floating platform (100). A flow guiding area is formed between two adjacent wave guides (140), and each flow guiding area is used to guide the waves to the inlet (111).

3. The offshore power generation device as described in claim 2, characterized in that, The ventilation channel (131) has a first ventilation end and a second ventilation end arranged opposite to each other. The first ventilation end is located at the bottom of the ventilation channel (131) and communicates with the pneumatic chamber (130). The second ventilation end is located at the top of the ventilation channel (131) and communicates with the outside. Each of the ventilation channels (131) has a wave-blocking component (150) installed outside the second ventilation end. The wave-blocking component (150) connects the second ventilation end of the ventilation channel (131) to the outside world and is used to block the flow of waves into the ventilation channel (131).

4. The offshore power generation device as described in claim 3, characterized in that, The wave guide plate (140) and the wave-blocking assembly (150) are respectively arranged in a one-to-one correspondence, and the wave-blocking assembly (150) includes: The first side baffle (151) and the second side baffle (152) are both provided on the top of the floating platform (100) and around the circumference of the floating platform (100). The first side baffle (151), the second ventilation end of the ventilation channel (131) and the second side baffle (152) are arranged in sequence. A first guide plate (153) and a second guide plate (154) are provided on the top of the floating platform (100). The first guide plate (153) is connected between the wave guide plate (140) and the first side baffle (151), and the second guide plate (154) is connected between the wave guide plate (140) and the second side baffle (152).

5. The offshore power generation device as described in claim 3, characterized in that, The wave-blocking assembly (150) includes a booster column (155), the first axial end of which is disposed on the top of the floating platform (100) and communicates with the second ventilation end of the ventilation channel (131), and the second axial end of which extends away from the floating platform (100). Alternatively, the wave-blocking assembly (150) includes a side drain pipe (156), the first axial end of which is disposed on the top of the floating platform (100) and connected to the second ventilation end of the ventilation channel (131), and the second axial end of which extends toward the location of the water storage tank (110).

6. The offshore power generation device as described in claim 1, characterized in that, An oscillation chamber is provided inside the floating platform (100) surrounding the drainage channel (112). Multiple partition plates (160) are provided inside the oscillation chamber. Each partition plate (160) is arranged circumferentially around the drainage channel (112) and divides the oscillation chamber into multiple pneumatic chambers (130). The ventilation channels (131) of each of the pneumatic chambers (130) are arranged circumferentially around the water storage tank (110).

7. The offshore power generation device as described in claim 1, characterized in that, The wave-guiding surface (120) is provided with a stepped structure.

8. The offshore power generation device as described in claim 1, characterized in that, The offshore power generation unit also includes a wind power system (400), which comprises: The bottom of the wind turbine tower (420) is installed on top of the floating platform (100) via a guide frame (410); Wind turbine (430) is mounted on top of the wind turbine tower (420).

9. The offshore power generation device as described in claim 1, characterized in that, The floating platform (100) is fixed at a predetermined sea area location by a mooring system (500), the mooring system (500) including an anchor and a mooring cable connected to the anchor, the mooring cable including at least one of a rope, anchor chain, steel cable and synthetic fiber cable.

10. The offshore power generation device as described in claim 1, characterized in that, The floating platform (100) is equipped with a ballast tank, which is used to control the stability and buoyancy of the floating platform (100) by adjusting the distribution of ballast water.

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