Integrated floating platform system for multi-source ocean energy cooperative power generation and photovoltaic hydrogen production

Abstract

The invention discloses an integrated floating platform system for multi-source ocean energy cooperative power generation and photovoltaic hydrogen production. The integrated floating platform system comprises a mooring power generation system, a photovoltaic hydrogen production platform and a vortex-induced vibration piezoelectric power generation system. The mooring power generation system comprises a mooring cable with an elastic cable, and the elastic cable is connected with a piezoelectric power generation device in series. The mooring rope is connected with the wave energy power generation anchor; the piezoelectric power generation device comprises an elastic unit connected in series on the elastic cable; the wave energy power generation anchor comprises a shell, the shell comprises a main cavity, and the main cavity communicates with branch cavities; an elastic film covers the opening of the sub-chamber; the main chamber and the branch chambers are divided into a first air passage and a second air passage; an air turbine is arranged in the first air channel; the first air channel is connected with a communicating pipe; a check valve is arranged between the communicating pipe and the first air channel; the vortex-induced vibration piezoelectric power generation system comprises an air cylinder with a piston rod, the piston rod is connected with an oscillation floater, an air turbine is arranged in the air cylinder, a second piezoelectric plate is arranged outside the air cylinder, and a spoiler is arranged at the end of the second piezoelectric plate. According to the invention, integration of offshore power generation and hydrogen production is realized, and the energy utilization rate is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of development and utilization of marine renewable energy, and in particular to an integrated floating platform system for synergistic power generation from multi-source marine energy and photovoltaic hydrogen production. Background Art

[0002] As global demand for clean energy grows, marine renewable energy, due to its abundant reserves and widespread distribution, has become a key development direction. Ocean energy primarily includes wave energy, current energy, and tidal energy. Solar energy, which enjoys abundant sunlight at sea, can be combined to form a multi-energy, complementary energy system.

[0003] However, the existing technologies have the following problems, such as insufficient efficiency in the utilization of a single energy source. Traditional offshore power generation devices usually only target a single energy form, such as wave energy or solar energy, and fail to achieve the coordinated development of multiple sources of ocean energy. The capture of wave energy often relies on oscillating floats or pendulum devices, which are complex in structure and greatly affected by wave frequency; the utilization of ocean current energy mostly uses turbines, which have high requirements for flow velocity and low efficiency at low flow rates; although solar photovoltaic panels are technologically mature, the swaying of offshore floating platforms may affect their power generation stability, and the production capacity of a single photovoltaic system fluctuates greatly on rainy days. As for mooring systems, traditional mooring systems have a single function. The mooring system of existing floating platforms is mainly used for platform positioning. The platform is only fixed by anchor chains or steel cables. The deformation energy of the mooring cable caused by waves during the mooring process is not utilized, resulting in waste of mechanical energy. At the same time, traditional anchor structures such as gravity anchors and suction anchors only serve a fixing function and do not integrate energy capture devices, resulting in insufficient resource utilization. As for hydrogen production equipment, the original photovoltaic hydrogen production has low integration. Offshore photovoltaic hydrogen production needs to solve problems such as platform stability, seawater desalination pretreatment, and corrosion resistance of hydrogen production equipment.

[0004] Secondly, in the existing technology, photovoltaic panels and hydrogen production devices are mostly arranged independently, lacking a systematic integrated design, resulting in large energy transmission losses and low platform space utilization. In addition, by-products such as oxygen generated in the hydrogen production process are not reasonably utilized, and the overall benefits of the system need to be improved. The ocean has a large usable area, which makes it easy to form a systematic integrated design. On the other hand, the main reason is the separation of energy conversion and storage. Existing ocean energy power generation devices mostly input electricity directly into the power grid or store it in batteries, and do not form an efficient coupling with the hydrogen production device. Electricity is lost during storage and conversion, and the integrated design of power generation and hydrogen production can directly use unstable renewable electricity to electrolyze water to produce hydrogen, solve the energy intermittency problem through hydrogen energy storage, and improve the overall efficiency of the system.

[0005] Based on the above situation, there is an urgent need for a floating platform system that integrates multi-source ocean energy capture, efficient energy conversion and photovoltaic hydrogen production, so as to achieve the coordinated utilization of wave energy, ocean current energy and solar energy, improve the comprehensive utilization rate of energy and reduce the cost of offshore energy development. Summary of the Invention

[0006] Purpose of the invention: In response to the problems of low utilization efficiency of multi-source ocean energy and insufficient integration of photovoltaic hydrogen production in the existing technology, the present invention proposes an integrated floating platform system for multi-source ocean energy coordinated power generation and photovoltaic hydrogen production. The platform system integrates multi-source ocean energy such as wave energy, ocean current energy, and solar energy for coordinated power generation, and couples photovoltaic hydrogen production technology, which is suitable for the comprehensive development of deep-sea renewable energy. Through innovative structural design, the coordinated capture and conversion of wave energy, ocean current energy, and solar energy are achieved. At the same time, the power generation system is integrated with the hydrogen production device to form an integrated power generation and hydrogen production platform, realizing the integrated integration of offshore power generation and hydrogen production, improving energy utilization efficiency, and providing solutions for offshore energy supply, marine engineering power supply and hydrogen energy preparation.

[0007] Technical Solution: The integrated floating platform system for multi-source ocean energy synergistic power generation and photovoltaic hydrogen production of the present invention includes a mooring power generation system, a photovoltaic hydrogen production platform, and a vortex-induced vibration piezoelectric power generation system. The mooring power generation system includes a mooring cable with an elastic cable, and a piezoelectric generator connected in series to the elastic cable. One end of the mooring cable is connected to a wave energy power generation anchor, and the other end is connected to the photovoltaic hydrogen production platform.

[0008] The piezoelectric power generation device includes an elastic unit connected in series to an elastic cable, the elastic unit including a first piezoelectric sheet, elastic rings at both ends of the first piezoelectric sheet, grooves for receiving the first piezoelectric sheet on the elastic rings, and a positioning assembly for fixing the elastic rings on the mooring cable;

[0009] The wave energy power generation anchor includes a shell, which includes a main chamber, the main chamber is connected to at least one sub-chamber; the sub-chambers are distributed with openings, and the openings are sealed and covered with elastic membranes; the main chamber and the sub-chambers are divided into a first air channel and a second air channel; an air turbine is provided in the first air channel; one end of the first air channel is connected to a connecting pipe, and the other end of the connecting pipe is connected to the second air channel; a check valve is provided at the connection between the connecting pipe and the first air channel; a column is provided at the bottom of the shell;

[0010] The vortex-induced vibration piezoelectric power generation system includes a cylinder with a piston rod, the piston rod is connected to an oscillating float, and a bidirectional air turbine is installed on the top of the cylinder. The oscillating float drives the bidirectional air turbine through the piston rod under the action of the ocean current to generate electricity;

[0011] A second piezoelectric piece is provided on the outside of the cylinder, and a concave spoiler is provided at the end of the second piezoelectric piece. The spoiler is disturbed by the ocean current, driving the second piezoelectric piece to vortex-induced vibration and deformation to generate current. The second piezoelectric piece is connected to a current rectifier.

[0012] The photovoltaic hydrogen production platform includes a platform body, a photovoltaic power generation device and a hydrogen production device. Ventilation holes are opened in the platform body, and the power generation unit is connected to the hydrogen production device.

[0013] The photovoltaic power generation device includes a photovoltaic panel and a bracket. There is a support frame under the photovoltaic panel, and there are connecting parts between the support frame and the bracket.

[0014] The positioning assembly comprises a clamp, which is composed of a fixing piece and two semi-annular rings. The annular rings are connected in series on the elastic cable and fixed to one side of the elastic ring through the fixing piece.

[0015] The check valve includes a ring component, a valve disc and a hinged fastener, which ensures the one-way flow of air and drives the air turbine to generate electricity.

[0016] The elastic membrane is a corrosion-resistant, flexible sheet-like component.

[0017] The hydrogen production device includes an electrolyzer that decomposes seawater. Photovoltaic panels absorb solar energy and generate direct current through the photovoltaic effect, which is then transmitted to the hydrogen production device.

[0018] The elastic cable is located in the middle of the mooring cable, and the elastic units are connected in series on the elastic cable. When the mooring cable is deformed by tension, the elastic rings of the two elastic units are compressed to squeeze the first piezoelectric piece, converting mechanical energy into electrical energy.

[0019] A mooring device is connected between the photovoltaic hydrogen production platform and the mooring cable.

[0020] The mooring device includes a winch and a fairlead, which are fixed to the photovoltaic hydrogen production platform.

[0021] Working Principle: The mooring power generation system of the present invention works by converting wave energy into mechanical energy and finally into electrical energy. When waves act on the floating platform, the photovoltaic hydrogen production platform is displaced, the mooring cable is stretched by tension, and the elastic nylon cable in the middle section undergoes elastic deformation, driving the rubber rings closer together, squeezing the embedded first piezoelectric plate, causing the first piezoelectric plate to deform, redistributing the internal charge of the first piezoelectric plate, and outputting alternating current. At the same time, the elastic rubber membrane of the wave energy anchor is squeezed laterally by the ocean current, and its periodic deformation causes the volume of the air chamber inside the shell to change: when the elastic rubber membrane is squeezed laterally by the ocean current, it bends toward the inside of the L-shaped reinforced concrete shell, the air chamber pressure increases, and air flows through the first air duct to the air turbine, driving the turbine to rotate and generate electricity; when the rubber membrane rebounds, the outside air flows into the second air duct through the connecting pipe. The check valve ensures one-way air flow, preventing the turbine from reversing and achieving continuous power generation.

[0022] The offshore photovoltaic hydrogen production platform absorbs solar energy through photovoltaic panels, generating direct current (DC) through the photovoltaic effect. This DC electricity is then transmitted via cables to the desalination hydrogen production unit. The desalination hydrogen production unit uses seawater as its raw material, removes impurities through a desalination module, and then decomposes the seawater into hydrogen and oxygen under the action of electricity. The generated hydrogen is stored in tanks built into the platform via pipelines, while the oxygen is collected or discharged as a byproduct.

[0023] The energy capture process of the vortex-induced vibration piezoelectric power generation system is as follows: when the ocean current flows through the spoiler, the concave surface triggers fluid separation, generating alternating vortices and forming vortex-induced forces, which cause the spoiler and the riveted second piezoelectric plate to vibrate periodically. When the second piezoelectric plate bends and deforms, a potential difference is generated between the upper and lower surfaces, outputting alternating current. At the same time, the oscillating float moves vertically with the ocean current, pulling the piston rod in the piston cylinder back and forth. When the float rises, the piston moves upward, reducing the air pressure in the cylinder and allowing outside air to enter. When the float descends, the piston presses downward, and the compressed air drives the bidirectional air turbine at the top outlet of the cylinder, driving the bidirectional air turbine to generate electricity.

[0024] The synergistic energy capture of vortex-induced vibration (VIV) piezoelectric effects and piston-driven aerodynamic power generation improves the efficiency of ocean current energy utilization. The multi-source energy coupling mechanism primarily generates electricity from moored power generation systems, column-mounted power generation systems, and photovoltaic panels. After integration through a rectifier, the electricity is preferentially supplied to the hydrogen production unit. Excess electricity is stored in batteries or transmitted to shore via submarine cables, preventing power curtailment.

[0025] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0026] (1) Multi-source synergy to improve energy utilization: The present invention integrates three energy forms: wave energy obtained from the piezoelectric mooring cable and the wave energy anchor air turbine, ocean current energy obtained from the column-type vortex-induced vibration and piston pneumatics, and solar energy obtained from photovoltaic panels. It covers ocean motions of different frequencies such as the vertical displacement of waves, the horizontal flow of ocean currents, and lighting conditions, thereby achieving multi-dimensional energy capture.

[0027] (2) Structural innovation, combining functionality and stability: The mooring cable of the present invention adopts a composite structure of steel cable-nylon cable-first piezoelectric plate. The elastic deformation of the nylon cable provides stress to the first piezoelectric plate, while alleviating the rigid load of wave impact on the platform, thereby improving the life of the mooring system. The wave energy anchor replaces the traditional anchor body with a cement column, and has both fixing and power generation functions, reducing the amount of seabed foundation construction. The hollow steel frame design of the photovoltaic platform facilitates the maintenance of photovoltaic panels, and the modular structure supports the rapid replacement of components.

[0028] (3) The spoiler used in the present invention is concave in shape, which captures the kinetic energy of the ocean to induce vortex-induced vibration, causing the second piezoelectric plate riveted to the outside of the cylinder to deform and generate electricity, and the current is summarized and output through the rectifier device.

[0029] (4) Integrated power generation and hydrogen production: This invention directly utilizes renewable electricity to electrolyze water to produce hydrogen, avoiding energy storage and conversion losses (traditional batteries have a charge and discharge efficiency of 80%, while direct electrolysis has an efficiency of over 90%). Hydrogen, as a high-energy-density fuel, is easy to transport and store, meeting the needs of offshore platforms for their own use (such as as a fuel cell feedstock) or for external sales, forming a closed loop of energy capture-conversion-storage-application, thereby reducing the cost of offshore energy development. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a general structural diagram of the integrated floating platform system for multi-source ocean energy coordinated power generation and photovoltaic hydrogen production according to the present invention;

[0031] Figure 2 This is a schematic structural diagram of the mooring power generation system of the present invention;

[0032] Figure 3 Schematic diagram of the wave energy anchor structure of the present invention;

[0033] Figure 4 This is a schematic diagram of the check valve structure of the present invention;

[0034] Figure 5 This is a schematic diagram of the elastic unit structure of the piezoelectric power generation device of the present invention;

[0035] Figure 6 A schematic diagram of the mooring device structure of the present invention;

[0036] Figure 7 Schematic diagram of the floating platform structure of the present invention;

[0037] Figure 8 This is a schematic structural diagram of the photovoltaic power generation device in the present invention;

[0038] Figure 9 It is a schematic diagram of the structure of the vortex-induced vibration piezoelectric power generation system in the present invention. DETAILED DESCRIPTION

[0039] like Figures 1 to 9 As shown, the integrated floating platform system for multi-source ocean energy synergistic power generation and photovoltaic hydrogen production of the present invention includes a moored power generation system 1, an offshore photovoltaic hydrogen production platform 2, and a vortex-induced vibration piezoelectric power generation system 3, which work in concert. In this embodiment, the vortex-induced vibration piezoelectric power generation system 3 is a column-type vortex-induced vibration piezoelectric power generation system.

[0040] like Figures 2 to 6 As shown, mooring power generation system 1 includes a mooring cable with elastic cables 1-12, to which a piezoelectric generator is connected in series. One end of the mooring cable is connected to a wave power generation anchor, and the other end is connected to a photovoltaic hydrogen production platform. In this embodiment, elastic cables 1-12 are nylon cables located in the middle section of the mooring cable, which is the flexible section.

[0041] The piezoelectric generator includes an elastic unit connected in series to an elastic cable. The elastic unit includes a first piezoelectric plate 1-2-2. Elastic rings 1-11 are located at both ends of the first piezoelectric plate. Elastic rings 1-11 are provided with grooves 1-2-1 that engage with the first piezoelectric plate 1-2-2. A positioning assembly is provided on the mooring cable to secure the elastic ring. In this embodiment, elastic rings 1-11 are rubber rings.

[0042] In this embodiment, a rubber ring 1-11 is sleeved onto the nylon cable. The bottom of the rubber ring 1-11 defines an annular groove 1-2-1 for inserting a first piezoelectric plate 1-2-2. The first piezoelectric plate is held in place by the elastic deformation of the rubber ring, and the ends of the nylon cable segment are secured by clamps 1-2-3.

[0043] like Figure 1 As shown, one end 1-1 of the mooring cable is connected to the mooring device on the floating offshore photovoltaic hydrogen production platform 2, and the other end is connected to the wave energy anchor. Figure 6 As shown, the mooring device consists of a winch 3-1, a fairlead 3-3, and a nut assembly 3-2. The fairlead 3-3 is riveted to the photovoltaic hydrogen production platform by the nut assembly 3-2. When the photovoltaic hydrogen production platform is on the sea surface, the mooring cable in the winch 3-1 is transported into the water by the fairlead 3-3 and connected to the wave energy anchor at the other end. There is a piezoelectric generator on the middle nylon cable 1-12. Figure 5 As shown, there is an annular groove 1-2-1 at the bottom of the rubber ring 1-11, which is used to embed the first piezoelectric piece 1-2-2. The first piezoelectric piece 1-2-2 is inserted into the groove 1-2-1, and the clamping force generated by the elastic deformation of the rubber is used to fix the first piezoelectric piece 1-2-2 to prevent sliding.

[0044] To prevent the piezoelectric generator from slipping, a positioning assembly is provided. This assembly includes a clamp 1-2-3, which is composed of a nut assembly 1-2-4 and two semi-circular stainless steel rings 1-2-5. These clamps are secured to the ends of the nylon mooring cable segment via the two semi-circular stainless steel rings 1-2-5 and the nut assembly 1-2-4, preventing the piezoelectric generator from shifting when the mooring cable moves. When waves cause the platform to shift, the mooring cable is deformed by tension. The compression between the two rubber rings 1-11 squeezes the first piezoelectric plate 1-2-2, causing it to convert mechanical energy into electrical energy.

[0045] In this embodiment, Figure 2-3As shown, the wave energy anchor in the moored power generation system 1 consists of an L-shaped reinforced concrete shell 1-3, an elastic membrane 1-4, an air turbine 1-5, a connecting pipe 1-6, a cement column 1-7, and a check valve 1-8. The cement column 1-7 is inserted into the seabed to secure the anchor. The interior of the L-shaped reinforced concrete shell 1-3 forms a sealed air chamber. The elastic rubber membrane 1-4 covers the opening of the shell. When squeezed by the ocean current, it deforms and drives the air flow within the air chamber. In this embodiment, the elastic membrane 1-4 is a rubber membrane.

[0046] Among them, the L-shaped reinforced concrete shell 1-3 includes a main chamber, one end of the main chamber is connected to at least one sub-chamber, the main chamber and the sub-chamber are divided into a first air duct 1-9 and a second air duct 1-10, an air turbine 1-5 is provided in the first air duct 1-9, one end of the first air duct is connected to a connecting pipe 1-6, and the other end of the connecting pipe 1-6 is connected to the second air duct 1-10; a check valve 1-8 is provided at the connection between the connecting pipe and the first air duct.

[0047] The sub-chambers are provided with openings. The edges of the elastic rubber membranes 1-4 are bolted over the sub-chamber openings, forming a sealed air chamber with the main chamber. The middle of the elastic rubber membranes deforms with the ocean current. A check valve 1-8 is located at the junction of the connecting pipe 1-6 and the sub-chambers.

[0048] When the wave energy anchor is submerged, concrete columns 1-7 are driven into the seabed, replacing the function of a traditional anchor. When the wave energy anchor remains stationary in the water, the ocean current compresses the elastic membrane 1-4, allowing air inside the housing 1-3 to flow. The elastic membrane 1-4 is a flexible sheet-like member with high elasticity and resistance to seawater corrosion.

[0049] In this embodiment, the structure of the check valve 1-8 is as follows Figure 4 As shown, the check valve 1-8 consists of a stainless steel ring 1-8-1, an iron pin 1-8-2, a valve disc 1-8-3, and a hinged fastener 1-8-4, ensuring unidirectional air flow while driving the air turbine to generate electricity. Check valve 1-8 is currently closed, ensuring unidirectional air flow through first air channel 1-9, passing through air turbine 1-5 and causing it to rotate and generate electricity. Air then flows through second air channel 1-10 and into check valve 1-8 through connecting pipe 1-6. At this point, both check valve discs 1-8-3 are open, ensuring unidirectional air flow within concrete shell 1-3.

[0050] like Figure 7-8 As shown, offshore photovoltaic hydrogen production platform 2 includes a platform body 2-1, a photovoltaic power generation device, and a hydrogen production device 2-3. The photovoltaic power generation device includes photovoltaic panels 2-5 and a support frame 2-2. A support frame is located below the photovoltaic panels, and the support frame and the support frame are connected by a connector. In this embodiment, the support frame is a hollow steel frame 2-7.

[0051] like Figure 6 As shown, photovoltaic panels 2-5 are inserted through slots in hollow steel frame 2-7 to facilitate future maintenance and replacement. Hollow steel frame 2-7 and steel frame connector 2-8 are connected to steel bracket 2-2 via nut assembly 2-6. Photovoltaic panels 2-5 convert light energy into electricity and supply it to hydrogen production device 2-3, which produces hydrogen through seawater electrolysis. Ventilation holes 2-4 are used for heat dissipation and gas exhaust.

[0052] In this embodiment, the vortex-induced vibration piezoelectric power generation system adopts a column-type vortex-induced vibration piezoelectric power generation system. Figure 9 As shown, the column-type vortex-induced vibration piezoelectric power generation system 3 includes a spoiler 3-1, a bidirectional air turbine 3-2, a current rectifier 3-3, a piston cylinder 3-4, a second piezoelectric plate 3-5, and an oscillating float 3-6. When the platform floats on the water, the oscillating float 3-6 oscillates up and down due to the action of the ocean current, pushing the piston rod in the piston cylinder 3-4 up and down, compressing the air in the cylinder, and pushing the bidirectional air turbine 3-2 at the top of the cylinder to rotate, thereby generating electricity. The outside of the cylinder 3-4 is riveted with a second piezoelectric plate 3-5, and the current rectifier 3-3 is connected to both sides of the second piezoelectric plate 3-5. The other end of the second piezoelectric plate is riveted with an inwardly concave spoiler 3-1 to maximize the capture of ocean current energy. When ocean currents pass through, they disturb the spoiler 3-1, causing the second piezoelectric plates 3-5 riveted to it to generate vortex-induced vibrations. This causes the second piezoelectric plates 3-5 to deform and generate current. The current from each second piezoelectric plate 3-5 passes through the rectifier 3-3, which converts the kinetic energy of the ocean current into electrical energy. The rectifier 3-3 converts alternating current into direct current.

[0053] The integrated working process of multi-source ocean energy synergistic power generation and photovoltaic hydrogen production in the present invention is as follows:

[0054] Step (1): When the waves act on the floating platform, the platform is displaced, the mooring cable is stretched by tension, and the middle flexible nylon cable segment undergoes elastic deformation, driving the adjacent rubber rings to approach each other and squeeze the embedded first piezoelectric plate. The first piezoelectric plate outputs alternating current due to mechanical deformation, and the electrical energy is collected into the current rectification system through the conductor. At the same time, the elastic rubber membrane of the wave energy anchor is periodically squeezed by the ocean current, driving the air flow in the closed air chamber: when the rubber membrane is concave, the high-pressure airflow flows into the air channel in one direction due to the action of the check valve, thereby driving the air turbine to rotate and generate electricity. The check valve is in a closed state at this time. After flowing out of the turbine, the air passes through the second air channel and flows into the check valve through the connecting pipe. At this time, the two valve discs of the check valve are in an open state, thereby ensuring the one-way flow of air inside the concrete shell and causing the rubber membrane to rebound. In addition, the composite structure of the mooring cable (steel cable-nylon cable-first piezoelectric plate) buffers the impact of waves, and the cement column is anchored on the seabed plane to fix the platform position and integrate the wave energy generation function to ensure the stable operation of the system under harsh sea conditions.

[0055] Step (2): The photovoltaic panels absorb solar energy and generate direct current (DC) through the photovoltaic effect. This electricity is then transmitted via cables to the water electrolysis hydrogen production device. After desalination pretreatment, the seawater enters the electrolyzer, where it is decomposed into hydrogen and oxygen by the action of electricity. The hydrogen is purified and stored in a high-pressure tank built into the platform. The photovoltaic panels are designed with a slide in the hollow steel frame, allowing for rapid maintenance and replacement, ensuring stable power generation efficiency.

[0056] Step (3): When the ocean current flows through the spoiler on the outside of the column, the concave surface generates alternating vortex motion, which triggers the periodic vibration of the second piezoelectric plate, generating current through the piezoelectric effect. At the same time, the oscillating float moves up and down with the ocean current, driving the piston rod in the piston cylinder to compress the air. The airflow drives the bidirectional air turbine to rotate and generate electricity. The two power generation modes (vortex-induced vibration and pneumatic) work together to improve the efficiency of ocean current energy conversion.

[0057] Step (4): The power generated by the columns is integrated through a rectifier. This power is preferentially supplied to the electrolytic hydrogen production unit, with any excess power stored in a storage device or fed into the grid via an inverter. The system monitors energy output fluctuations in real time, dynamically adjusting hydrogen production power and optimizing the efficiency of absorbing unstable renewable energy.

Claims

1. An integrated floating platform system for multi-source ocean energy synergistic power generation and photovoltaic hydrogen production, characterized by: It includes a mooring power generation system, a photovoltaic hydrogen production platform and a vortex-induced vibration piezoelectric power generation system; the mooring power generation system includes a mooring cable with an elastic cable, and a piezoelectric power generation device is connected in series to the elastic cable; one end of the mooring cable is connected to a wave energy power generation anchor, and the other end is connected to the photovoltaic hydrogen production platform; The piezoelectric power generation device includes an elastic unit connected in series to an elastic cable, the elastic unit includes a first piezoelectric sheet, elastic rings are provided at both ends of the first piezoelectric sheet, the elastic rings are provided with grooves for receiving the first piezoelectric sheet, and the mooring cable has a positioning assembly for fixing the elastic rings; The wave energy power generation anchor comprises a shell, the shell comprising a main chamber, the main chamber being connected to at least one sub-chamber; the sub-chambers are provided with openings, and the openings are sealed and covered with elastic membranes; the main chamber and the sub-chambers are divided into a first air channel and a second air channel; an air turbine is provided in the first air channel; one end of the first air channel is connected to a connecting pipe, and the other end of the connecting pipe is connected to the second air channel; a check valve is provided at the connection between the connecting pipe and the first air channel; and a column is provided at the bottom of the shell; The vortex-induced vibration piezoelectric power generation system includes a cylinder with a piston rod, the piston rod is connected to an oscillating float, and a bidirectional air turbine is provided on the top of the cylinder. The oscillating float drives the bidirectional air turbine through the piston rod under the action of the ocean current to generate electricity; A second piezoelectric sheet is provided on the outside of the cylinder, and a concave spoiler is provided at the end of the second piezoelectric sheet; the spoiler is disturbed by the ocean current, driving the second piezoelectric sheet to vortex-induced vibration and deformation to generate current; the second piezoelectric sheet is connected to a current rectifier.

2. The integrated floating platform system for multi-source ocean energy synergistic power generation and photovoltaic hydrogen production according to claim 1 is characterized by: The photovoltaic hydrogen production platform includes a platform body, a photovoltaic power generation device and a hydrogen production device. A ventilation hole is opened in the platform body, and the power generation unit is connected to the hydrogen production device.

3. The integrated floating platform system for multi-source ocean energy synergistic power generation and photovoltaic hydrogen production according to claim 2 is characterized by: The photovoltaic power generation device includes a photovoltaic panel and a bracket. A support bracket is provided below the photovoltaic panel, and a connecting piece is provided between the support bracket and the bracket.

4. The integrated floating platform system for multi-source ocean energy synergistic power generation and photovoltaic hydrogen production according to claim 1 is characterized by: The positioning assembly comprises a clamp, which is composed of a fixing piece and two semi-annular rings. The annular rings are connected in series on the elastic cable and fixed to one side of the elastic ring through the fixing piece.

5. The integrated floating platform system for multi-source ocean energy synergistic power generation and photovoltaic hydrogen production according to claim 1 is characterized by: The check valve includes an annular component, a valve disc and a hinged fixture.

6. The integrated floating platform system for multi-source ocean energy synergistic power generation and photovoltaic hydrogen production according to claim 1 is characterized by: The elastic membrane is a corrosion-resistant flexible sheet-like component.

7. The integrated floating platform system for multi-source ocean energy synergistic power generation and photovoltaic hydrogen production according to claim 3 is characterized by: The hydrogen production device includes an electrolyzer for decomposing seawater, and the photovoltaic panel transmits electrical energy to the hydrogen production device.

8. The integrated floating platform system for multi-source ocean energy synergistic power generation and photovoltaic hydrogen production according to claim 1 is characterized by: The elastic cable is located in the middle of the mooring cable, and the elastic unit is connected in series to the elastic cable.

9. The integrated floating platform system for multi-source ocean energy synergistic power generation and photovoltaic hydrogen production according to claim 1 is characterized by: A mooring device is connected between the photovoltaic hydrogen production platform and the mooring cable.

10. The integrated floating platform system for multi-source ocean energy synergistic power generation and photovoltaic hydrogen production according to claim 9 is characterized by: The mooring device includes a winch and a fairlead, and the winch and the fairlead are fixed on the photovoltaic hydrogen production platform.

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