Offshore wind, light, wave and flow resource integrated energy island system

Abstract

The invention discloses an offshore wind, light, wave and flow resource integrated energy island system, and relates to the field of ocean energy development.The energy island system is characterized in that an overall framework is formed by energy unit structures which are sequentially connected in series through horizontal supporting slideways, and each energy unit structure comprises a wind turbine generator and an equipment platform which are installed on a caisson foundation; the wind turbine generator comprises a horizontal shaft fan device and a fan tower drum, an electric pulley on the equipment platform is connected with a culture fishing net through a horizontal supporting slide way, and an electromagnetic unit and tower crane construction equipment capable of lowering the artificial fish reef to a designated marine space position are installed on the equipment platform; the electromagnetic unit comprises a solar photovoltaic panel, electric driving equipment and GPS (Global Positioning System) positioning equipment; according to the invention, ocean resources in a defined range are fully utilized, the problem of resource waste caused by insufficient resource utilization due to construction of a single offshore wind power plant or an offshore photovoltaic power station is solved, and three-dimensional comprehensive development and utilization of energy are realized.

Description

Technical Field

[0001] The present invention relates to the field of ocean energy development, and in particular to an offshore energy island system integrating wind, light, wave and current resources. Background Art

[0002] In response to the nation's "dual carbon" strategic goals, the focus of energy development is shifting toward the ocean. The ocean holds vast reserves of renewable energy, including tidal energy, wave energy, ocean current energy (tidal current energy), offshore wind energy, and offshore solar energy. These energies, with their significant advantages of abundant reserves, clean and pollution-free operation, and strong renewability, are recognized as highly promising alternatives to traditional fossil fuels. Consequently, China is actively promoting the research, development, and demonstration applications of marine renewable energy technologies, including offshore wind power, offshore photovoltaics, and integrated offshore energy platforms (such as energy islands).

[0003] As a cutting-edge off-grid or weakly grid-connected energy supply model, the new offshore energy island is still in the early stages of research and development and design. Its core lies in building a relatively independent integrated energy system, which usually integrates a variety of renewable energy power generation devices (such as wind turbines, photovoltaic panels, wave energy converters) and supporting energy storage equipment (such as batteries, hydrogen storage devices), aiming to provide a stable and sustainable power supply for specific offshore areas (such as offshore islands, offshore platforms, and coastal facilities). Compared with the traditional model that relies on a single external power grid, the energy island system significantly improves the autonomy and resilience of energy supply, especially in scenarios where the external power grid is unreachable or the power supply is unstable, and can rely on its energy storage units to ensure the continuous operation of critical loads.

[0004] In the field of marine engineering, caisson foundations have become a key anchoring foundation for offshore structures due to their ease of installation, controllable quality, potential recyclability, and minimal impact on the marine ecosystem. These foundations are typically connected to upper energy island structures (such as platform decks and equipment support frames) through a pile foundation system, providing the entire system with the necessary bearing capacity and stability to withstand the complex marine loads of wind, waves, and currents.

[0005] Although significant progress has been made in single technology areas such as offshore wind energy, wave energy, and offshore photovoltaics, and some power generation devices have achieved commercial operation, the independent development of a single type of energy (such as building only wind farms or only photovoltaic power stations) has significant drawbacks:

[0006] Inefficient resource utilization: Specific sea areas often host multiple viable energy sources (e.g., wind, light, waves, and currents). Single-use development models utilize only one or a few of these resources, failing to fully tap the region's overall energy potential and resulting in a waste of valuable natural energy resources.

[0007] Duplicate infrastructure investment and spatial conflicts: Separately building supporting structures, transmission systems, and operation and maintenance facilities for different energy sources results in increased ocean space occupation, significantly increased construction costs, and may trigger conflicts over the use of the sea between different projects.

[0008] System output volatility and reliability challenges: The power generation output of a single energy source is significantly affected by its inherent characteristics (such as the intermittent nature of wind energy, the diurnal nature of photovoltaics, and the randomness of wave energy), and fluctuates violently. Relying solely on a single energy source and supporting energy storage makes it difficult to achieve a highly reliable, continuous and stable power supply in an economical and efficient manner, and places extremely high demands on energy storage capacity and regulation capabilities. Although the "energy island" concept proposes the idea of ​​integrating multiple energy sources, in the complex environment of deep sea, how to efficiently, compactly and reliably integrate wind, light, waves, currents and other renewable energy equipment with different energy densities, fluctuation characteristics and conversion technologies on the same platform or in adjacent sea areas, and achieve efficient energy capture, conversion, storage, scheduling and coordinated control, is the key technical bottleneck currently faced. The existing engineering experience and technical solutions for single energy projects are difficult to directly and effectively solve the complex challenges of multi-energy complementary integrated systems in terms of structural coupling, energy flow optimization, dynamic control, and economic efficiency.

[0009] How can we overcome the limitations of single-energy development and efficiently integrate multiple renewable energy sources, such as wind, solar, wave, and ocean currents, in specific sea areas (especially deep and deep ocean) to build an integrated energy island system that is compact, stable, economically feasible, and maximizes resource utilization? This requires innovative solutions to key technical challenges in spatial layout, infrastructure support, energy aggregation, and coordinated control of multi-energy equipment. Summary of the Invention

[0010] The present invention aims to address the problems existing in the prior art and proposes an integrated offshore energy island system using wind, solar, wave, and current resources, utilizing a caisson foundation. Within a selected ocean region, the system integrates offshore wind power, solar photovoltaic power generation, wave power generation, and marine fishery aquaculture. The system comprises an integrated framework of energy units connected in series via horizontal support slideways. The energy unit structure comprises a wind turbine and an equipment platform mounted on a caisson foundation. The wind turbine comprises a horizontal-axis wind turbine assembly and a wind turbine tower. A motorized pulley on the equipment platform is connected to a fish farming net via a horizontal support slideway. The equipment platform is equipped with an electromagnetic unit and a tower crane capable of lowering an artificial reef to a designated offshore location. The electromagnetic unit comprises a solar photovoltaic panel, an electric drive unit, and a GPS positioning device. The caisson foundation is internally provided with electric bolts that enhance mooring force. Unscrewing the electric bolts releases constraints, allowing the foundation to float. The electric bolts, electric drive unit, tower crane, and GPS positioning device are all powered by the energy island system.

[0011] Preferably, the horizontal axis fan device is fixedly mounted on the equipment platform via a fan tower.

[0012] Preferably, the electromagnetic unit includes an electromagnetic coil arranged in the middle area of ​​the equipment platform, and the electromagnetic coil is sleeved on the magnetic field column.

[0013] Preferably, the energy unit structure also includes a turbine unit fixedly mounted on the lower part of the equipment platform via a connecting shaft. The turbine unit can impact the blades through the action of ocean currents, drive the shaft to rotate, and thus generate electricity.

[0014] Preferably, the electric pulley is connected to the aquaculture fish net through a horizontal support slideway, and the aquaculture fish net is connected to the upper part of the equipment platform and the upper part of the caisson foundation top cover.

[0015] Preferably, the electric drive equipment and GPS positioning equipment on the equipment platform are provided with the required electricity by the energy island. When the energy island needs to be relocated or maintained, the power is first turned on to control the contraction of the aquaculture net, and the electric bolts of the caisson foundation are screwed upward to separate the caisson foundation from the mud surface. Then the drive and positioning device are started, the movement state of each energy unit structure is adjusted, and the GPS positioning equipment is used to migrate to the designated sea area to continue the sinking operation.

[0016] Preferably, the wind turbine generator set, equipment platform, caisson foundation and horizontal support slide can be prefabricated and integrated into an energy unit structure.

[0017] The present invention provides an integrated offshore wind, solar, wave, and current resource energy island system that fully utilizes the marine resources within a designated area. By integrating wind power generation devices, photovoltaic power generation devices, wave power generation devices, and ocean current (tidal) power generation devices within the same designated sea area, it effectively overcomes the exclusive occupation of the sea area by the development of a single energy source. The present invention achieves the simultaneous capture and joint development of multiple renewable energy sources, such as wind energy, solar energy, wave energy, and ocean current energy, within the sea area, significantly reducing the sea area required for unit energy output and solving the problems of insufficient utilization of marine space resources and duplicated infrastructure construction caused by existing single offshore wind farms, photovoltaic farms, and other models.

[0018] Thanks to the complementary characteristics of various energy forms (such as the correlation between wind energy and wave energy, the diurnal characteristics of photovoltaics and the relative stability of ocean current energy) and the coordinated control mechanism within the system, the present invention can achieve: comprehensive capture of multiple energy sources, so that the total power generation in the same sea area is significantly higher than the development of a single energy form; the output characteristics of different energy sources complement each other, effectively smoothing the overall power output curve of the system, and reducing the risk of system instability caused by the intermittent and volatility of a single energy source; through the energy management and scheduling strategies within the system, the phenomenon of wind and solar power abandonment is reduced, the overall energy conversion and utilization efficiency is improved, and the three-dimensional and comprehensive development and utilization of marine renewable energy is realized.

[0019] The horizontal support slideway installed on the equipment platform and the electric pulley drive mechanism connected to it enable the aquaculture fishing net to slide accurately and conveniently along the predetermined track. This structural design significantly reduces the difficulty and labor intensity of fishing net retrieval, replacement, and fishing operations during aquaculture operations, and improves the efficiency and convenience of aquaculture management. The electricity generated by wind energy, light energy, and wave energy in the system provides a stable and clean power supply for aquaculture equipment such as bait feeding, environmental monitoring, and electric pulley drive, reducing the energy cost of fishery aquaculture. At the same time, it provides power for the energy island's own monitoring, communication, control, lighting, and transportation and operation and maintenance activities such as charging of operation and maintenance ships and equipment maintenance. Combined with supporting energy storage equipment, the system can operate in sea areas far away from the external power supply network, forming a highly self-consistent energy supply unit, significantly reducing dependence on traditional fossil energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the energy unit structure of the present invention;

[0022] Figure 3 It is a schematic diagram of the device platform structure of the present invention.

[0023] In the figure: 1. Horizontal-axis wind turbine device; 2. Wind turbine tower; 3. Equipment platform; 4. Electric drive equipment; 5. Electric bolts; 6. Caisson foundation; 7. Electromagnetic coil; 8. Water turbine unit; 9. Fishing net; 10. GPS positioning equipment; 11. Tower crane construction equipment; 12. Horizontal support slide; 13. Electric pulley; 14. Solar photovoltaic panel. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] like Figure 1-3 As shown, the present invention provides an integrated energy island system of offshore wind, light, wave and current resources. The energy island system is composed of an energy unit structure connected in series through a horizontal support slide 12 to form an overall skeleton. The energy unit structure includes a wind turbine and an equipment platform 3 installed on a caisson foundation 6. The wind turbine includes a horizontal axis wind turbine device 1 and a wind turbine tower 2. The horizontal axis wind turbine device 1 is fixedly installed on the equipment platform 3 through the wind turbine tower 2. The electric pulley 13 on the equipment platform 3 is connected to the aquaculture fish net 9 through the horizontal support slide 12. The electric pulley 13 is connected to the aquaculture fish net 9 through the horizontal support slide 12. The aquaculture fish net 9 is connected to the upper part of the equipment platform 3 and the upper part of the top cover of the caisson foundation 6; an electromagnetic unit and a tower crane construction device 11 that can lower artificial fish reefs to a specified offshore space position are installed on the equipment platform 3. The electromagnetic unit includes a solar photovoltaic panel 14, an electric drive device 4 and a GPS positioning device 10. The electric drive device 4 and the GPS positioning device 10 on the equipment platform 3 are provided with the required electricity by the energy island. When the energy When the island needs to be moved or maintained, the power is first turned on to control the contraction of the aquaculture net 9, and the electric bolt 5 of the caisson foundation 6 is unscrewed upward to separate the caisson foundation 6 from the mud surface. Then the driving and positioning devices are started, the motion state of each energy unit structure is adjusted, and the GPS positioning device 10 is used to move to the designated sea area to continue the sinking operation; the electromagnetic unit also includes an electromagnetic coil 7 arranged in the middle area of ​​the equipment platform 3, and the electromagnetic coil 7 is sleeved on the magnetic field column; the caisson foundation 6 is provided with an electric bolt 5 that can enhance the mooring force. After the electric bolt 5 is unscrewed, the constraint limit can be released to allow the foundation to float; the electric bolt 5, the electric drive device 4, the tower crane construction equipment 11 and the GPS positioning device 10 are all powered by the energy island system; the energy unit structure also includes a turbine unit 8 fixedly installed on the lower part of the equipment platform 3 through a connecting shaft. The turbine unit 8 can impact the blades through the action of the ocean current, drive the shaft to rotate and generate electricity; the wind turbine unit, the equipment platform 3, the caisson foundation 6 and the horizontal support slide 12 can be prefabricated and integrated into an energy unit structure.

[0026] The caisson foundations 6 are arranged in a hexagonal pattern. In actual construction, the number and range of caissons can be determined based on the seabed environment and geological conditions. Horizontal support slideways 12 are installed on the upper surfaces of adjacent foundations. Vertical supports can be installed if the spacing between adjacent foundations is too large. Electric bolts 5 are installed within the caisson foundations 6 to control the raising and lowering of the bolts. When the foundation sinks, the bolts are lowered to increase mooring force; when the foundation rises, the bolts are raised to facilitate buoyancy. The caisson foundations 6 and the upper portion, consisting of a wind turbine, electromagnetic generator, hydraulic turbine 8, and equipment platform 3, form the energy unit structure. In the wind turbine generator set, the horizontal axis wind turbine device 1 is fixed to the connection section of the equipment platform 3 through the wind turbine tower 2; in the electromagnetic unit, a number of electromagnetic coils 7 are arranged in the middle area of ​​the energy unit, and the electromagnetic coils 7 are sleeved in the magnetic field column. The wave impact is used to make the coils cut back and forth in the magnetic field to generate electricity; in the lower turbine unit 8, the turbine unit 8 and the generator unit are respectively fixed to the connection of the energy unit through a coupling and a sealing device; the blades are impacted by the action of the ocean current, driving the rotating shaft to rotate and thus generate electricity; the equipment platform 3 includes a solar photovoltaic panel 14, a tower crane construction equipment 11, an electric drive device 4, a GPS positioning device 10 and an electric pulley 13. The tower crane construction equipment 11 is installed on the platform surface to facilitate construction work in the sea area within the energy island; the electric energy provided by the energy island controls the power drive equipment 4 and the GPS positioning equipment 10, so that the energy island can be moved within a specific sea area; the electric pulley 13 is connected to the aquaculture fish net 9 through the horizontal support slide 12, and the aquaculture fish net 9 is connected to the upper part of the equipment platform 3 and the upper part of the top cover of the caisson foundation 6, that is, the aquaculture area is the closed sea area surrounded by the energy unit, and the side net is connected to the equipment platform 3 through the slide, and the net can be moved along the direction of the equipment platform 3, which is convenient for net recovery and replacement.

[0027] Example:

[0028] like Figure 1-3 As shown, a novel offshore energy island system integrating wind, solar, wave, and current resources consists of energy unit structures. Each energy unit structure includes a caisson foundation 6, a wind turbine tower 2, a horizontal-axis wind turbine device 1, a fish farming net 9, a solar photovoltaic panel 14, an electric drive device 4, an electromagnetic coil 7, a hydraulic turbine assembly 8, a tower crane 11, and a GPS positioning device 10. The energy unit structures are connected in series via horizontal support slides 12 to form a stable energy island system.

[0029] First, the scope of establishing the energy island is delineated in the designated sea area, and the caisson foundation 6 is installed at the boundary inflection point according to the sea conditions and actual geological conditions. The caisson foundation 6 serves as the source of stable mooring force for the energy island system. According to the specifications, the net distance between adjacent wind turbines should generally reach 5-8 times of their rotation radius. If the distance between the wind turbines is too far to meet the system bearing capacity requirements during the actual construction process, reinforcing materials can be appropriately added to the bottom or side of the caisson to give full play to the bearing function of the caisson foundation 6.

[0030] The caisson foundation 6 of the wind, light, wave and current integrated energy island system of the present invention has three functions. First, as the foundation of the energy island system, it provides a stable mooring force for the energy island system; second, the reasonable arrangement of the caisson foundation 6 can control the operating range and shape of the water area; third, combined with marine aquaculture, it provides fence support.

[0031] The energy unit structure in the energy island system also has three functions. First, it connects the upper part of the offshore wind turbine to the upper head and the lower foundation. Second, it is combined with marine aquaculture and connected to the aquaculture fishing net 9 through the horizontal support slide 12 to provide structural support for marine aquaculture. Third, the energy unit structure adopts an integrated combination of equipment platform 3, electromagnetic unit and turbine unit 8 to make full use of the offshore water area and improve power generation efficiency.

[0032] The horizontal axis wind turbine device 1 is fixed to the upper end of the wind turbine tower 2, and the lower end of the horizontal axis wind turbine device 1 is fixed to the corner of the equipment platform 3. The electromagnetic coil 7 is connected to the lower end of the equipment platform 3, and the turbine unit 8 is installed at the lower end of the electromagnetic coil 7, which together constitute an energy unit structure. The generator sets are all arranged inside the equipment platform 3. The equipment platform 3 is connected to the caisson foundation 6 through piles. The upper surface of the caisson foundation 6 is provided with electric bolts 5 and horizontal support slides 12. The horizontal support slides 12 are connected to the aquaculture fish net 9. The electric pulley 13 is energized to control the aquaculture fish net 9 to move along the horizontal support slide 12, which is convenient for fishing and recovery of the aquaculture fish net 9. Solar photovoltaic panels 14 are installed on 1 / 3 of the upper surface of the equipment platform 3, and tower crane construction equipment 11, power drive equipment 4 and GPS positioning equipment 10 are installed on 1 / 3 of the area.

[0033] The wind turbine tower 2, turbine assembly 8, electromagnetic assembly, and horizontal support slideway 12 can be prefabricated at an onshore steel mill. The wind turbine assembly, turbine assembly 8, and electromagnetic assembly are integrated into an energy unit in a dock on the shore. The electric drive device 4 and electric pulley 13 are then installed on the equipment platform 3. The assembled energy unit components are then transported to the system operation site using an integrated installation method. The energy unit components are connected to the caisson foundation 6 via piles. Installation should comply with applicable regulations. After the wind turbine is installed, the support structure is installed. The horizontal support slideway 12 is fixed to the electric pulley 13. Each energy unit structure is connected to each other at the upper end via the electric pulley 13, horizontal support slideway 12, and equipment platform 3, and to each other at the lower end via the upper surface of the caisson foundation 6 and the horizontal support slideway 12. After the external support structure is installed, the fish farming net 9 is assembled. First, the outer side of the fish farming net 9 is assembled with the electric pulley 13 that matches the horizontal support slideway 12. Then, the electric pulley 13 is electrically controlled to move along the horizontal support slideway 12 to a designated position and secure it.

[0034] Marine aquaculture requires a specific aquaculture environment, which is generally controlled by the tower crane construction equipment 11 on the equipment platform 3. The construction equipment is transported to the equipment platform 3 by a large lifting ship, and then the artificial fish reefs and sand nutrients are transported to the equipment platform 3 by a transport ship. Through the lifting equipment, they are placed in the designated location in the sea to complete the establishment of the marine aquaculture environment.

[0035] The electric drive device 4 and GPS positioning device 10 on the equipment platform 3 are provided with the required electricity by the energy island itself. When the energy island needs to be moved or maintained, first, the power is turned on to control the contraction of the aquaculture net 9, and the electric bolts 5 of the caisson foundation 6 are screwed out upward to separate the caisson foundation 6 from the mud surface. Then, the driving and positioning devices are started, the movement state of each energy unit is adjusted, and the GPS positioning device 10 is used to move to the designated sea area to continue the sinking operation, thereby realizing the recycling of the energy island.

Claims

1. An offshore energy island system integrating wind, solar, wave and current resources, characterized by: The energy island system is composed of an energy unit structure connected in series through a horizontal support slide to form an overall skeleton. The energy unit structure includes a wind turbine and an equipment platform installed on a caisson foundation. The wind turbine includes a horizontal axis wind turbine device and a wind turbine tower. The electric pulley on the equipment platform is connected to the aquaculture fish net through a horizontal support slide. The equipment platform is equipped with an electromagnetic unit and a tower crane construction equipment that can lower artificial fish reefs to a designated offshore space location. The electromagnetic unit includes a solar photovoltaic panel, an electric drive device and a GPS positioning device.

2. The offshore wind, solar, wave and current integrated energy island system according to claim 1 is characterized by: The caisson foundation is internally provided with electric bolts for enhancing the mooring force. When the electric bolts are unscrewed, the restraints can be released, allowing the foundation to float.

3. The offshore wind, solar, wave and current integrated energy island system according to claim 1 is characterized by: The horizontal axis fan device is fixedly installed on the equipment platform through the fan tower.

4. The offshore wind, solar, wave and current integrated energy island system according to claim 1 is characterized by: The electromagnetic unit includes an electromagnetic coil arranged in the middle area of ​​the equipment platform, and the electromagnetic coil is sleeved on the magnetic field column.

5. The offshore wind, solar, wave and current integrated energy island system according to claim 1 is characterized by: The energy unit structure also includes a turbine unit fixedly installed at the bottom of the equipment platform through a connecting shaft. The turbine unit can impact the blades through the action of ocean currents, drive the rotating shaft to rotate, and thus generate electricity.

6. The offshore wind, solar, wave and current integrated energy island system according to claim 1 is characterized by: The electric pulley is connected to the aquaculture fish net through a horizontal support slideway, and the aquaculture fish net is connected to the upper part of the equipment platform and the upper part of the caisson foundation top cover.

7. The offshore wind, solar, wave and current integrated energy island system according to claim 1 is characterized by: The electric drive equipment and GPS positioning equipment on the equipment platform are provided with the required electricity by the energy island. When the energy island needs to be relocated or maintained, the power is first turned on to control the contraction of the aquaculture net, and the electric bolts of the caisson foundation are screwed upward to separate the caisson foundation from the mud surface. Then the drive and positioning devices are started, the movement state of each energy unit structure is adjusted, and the GPS positioning equipment is used to migrate to the designated sea area to continue the sinking operation.

8. The offshore wind, solar, wave and current integrated energy island system according to claim 1 is characterized by: The wind turbine generator set, equipment platform, caisson foundation and horizontal support slideway can be prefabricated and integrated into an energy unit structure.

9. The offshore wind, solar, wave and current integrated energy island system according to claim 1 is characterized by: The electric drive equipment, tower crane construction equipment and GPS positioning equipment are all powered by the energy island system.

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