CN115123469A - Offshore floating energy island - Google Patents
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- CN115123469A CN115123469A CN202110298681.4A CN202110298681A CN115123469A CN 115123469 A CN115123469 A CN 115123469A CN 202110298681 A CN202110298681 A CN 202110298681A CN 115123469 A CN115123469 A CN 115123469A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
- F03D13/25—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors specially adapted for offshore installation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/007—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations the wind motor being combined with means for converting solar radiation into useful energy
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/008—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations the wind motor being combined with water energy converters, e.g. a water turbine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/20—Wind motors characterised by the driven apparatus
- F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
- B63B2035/4433—Floating structures carrying electric power plants
- B63B2035/4453—Floating structures carrying electric power plants for converting solar energy into electric energy
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
- B63B2035/4433—Floating structures carrying electric power plants
- B63B2035/446—Floating structures carrying electric power plants for converting wind energy into electric energy
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
- B63B2035/4433—Floating structures carrying electric power plants
- B63B2035/4466—Floating structures carrying electric power plants for converting water energy into electric energy, e.g. from tidal flows, waves or currents
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Combustion & Propulsion (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
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- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
An offshore floating energy island device is composed of an offshore energy island main body platform 1 and a plurality of modularized power generation and energy storage platforms 2; the main body platform 1 is a large-scale offshore floating platform, and is provided with a comprehensive combined power generation system 10, an electric energy storage system 11, an electric energy conversion system 12, an electric energy transmission system 13, an energy island intelligent control system 14, a seawater desalination system 15 and the like; the modularized power generation and energy storage platform 2 is a combined modularized floating body platform, and an offshore photovoltaic power generation system 21, an offshore wind power generation system 22, an offshore wave power generation system 23, a distributed electric energy storage device 24, a distributed energy conversion and energy storage device 25 and the like are arranged on the modularized power generation and energy storage platform respectively or jointly.
Description
Technical Field
The invention relates to a marine floating energy island device, in particular to a marine comprehensive power generation, energy storage and energy conversion system and a floating platform.
Background
The development of traditional energy sources is facing serious challenges. The greenhouse effect and other pollution problems which are accompanied by the traditional energy sources in the using process also affect the living environment of people. With the rapid development of industrialization and modernization, the human demand for energy is more and more increased; if other energy conversion modes and new energy sources are searched and developed without active measures, the energy problem seriously threatens the survival and development of the human society.
Renewable energy sources such as solar energy, wind energy, ocean energy and the like have huge reserves, wide distribution and no pollution in development and utilization. How to convert these resources into energy sources generally required by modern society has been highly valued and expected by various countries.
First is solar energy. The energy radiated to the earth surface by the sun each year is about 3 x 10 24 Joule is equivalent to about 10000 times of the current global commercial energy consumption. Therefore, solar energy is one of important choices for human society to deal with energy shortage, climate change, energy conservation and emission reduction as a clean, environment-friendly and widely and persistently existing new energy. At present, two solar power generation modes, namely thermal power generation and photovoltaic power generation, are mainly utilized by solar energy. The thermal power generation is to convert solar radiation energy into heat energy and apply the heat energy for power generation; photovoltaic power generation is to use the photovoltaic effect principle of semiconductor and other materials to manufacture a solar cell and convert light energy into electric energy. In recent years, photovoltaic power generation has been rapidly developed. However, the proportion of the existing photovoltaic power generation in the energy market is less than 1%, and factors hindering the development of the existing photovoltaic power generation are the efficiency problem and the development and application problems of new materials and new structures. How to further enhance the absorption of sunlight, how to reduce the energy loss caused by sunlight reflection, how to organically combine photovoltaic power generation and photo-thermal power generation and efficiently comprehensively utilize the combination, and the like are problems which are extremely to be solved by people at the present stage.
And secondly wind energy. Wind power has been increasingly gaining attention as a clean renewable energy source in all countries of the world. The accumulated amount of the wind energy is huge, and the global wind energy is about 2.74 multiplied by 10 9 MW, in which the available wind power is 2 x 10 7 MW is 10 times larger than the total amount of water energy which can be developed and utilized on the earth. The wind energy reserve of China is very large and wide in distribution, and the land-only wind energy reserve is about 2.53 hundred million kilowatts. With the development of global economy, the wind energy market has rapidly developed. The world wind energy market is expected to increase by about 25% each year in the past 20-25 years. With the technological progress and the development of environmental protection industry, the commercial generation of wind energy can completely compete with the generation of coal.
The ocean can be more than negligible. Undoubtedly, ocean energy also has very good quality, i.e. reproducibility and cleanness, and is new energy which is urgently to be developed and utilized at the present stage and has very strategic significance. China has a coastline of 18000 kilometers, a subdomain of over 300 ten thousand square kilometers and abundant ocean energy resources. Wherein, the storage capacity of wave energy in offshore sea areas is about 1.5 hundred million kilowatts, the development and utilization amount is about 3000-3500 ten thousand kilowatts, and the ocean wind energy is about 7 hundred million kilowatts. Therefore, the ocean new energy is vigorously developed, and the method has great significance for optimizing the energy consumption structure of China and supporting the sustainable development of the economic society.
The development of marine resources, marine energy, is undoubtedly an important aspect. As a new energy source for sustainable development, offshore wind energy, offshore solar energy and offshore wave energy have the advantages of inexhaustibility. However, wind energy, solar energy and wave energy have the characteristics of low energy density, great influence by factors such as seasons, climate and geographical positions and instability. Therefore, the comprehensive development of wind energy, solar energy, wave energy, ocean temperature difference energy and the like is adopted, and the method is a better measure for solving the problem of instability of the resources. Of course, the best method would be to construct a comprehensive island of offshore energy.
The idea of constructing an offshore integrated energy island was first seen in Dominic mikaelis (Dominic Michaelis). The idea of mikailis to initially design an energy island is to upgrade an Ocean Thermal Energy Conversion (OTEC) system. The OTEC system is a device for generating electric power by circulating cold seawater pumped from deep in the sea bottom. However, the current OTEC system has not made a new breakthrough and is slowly developed. "why other energy manufacturing techniques are not organically combined with the system, such as converting sea wave energy and converting solar energy. In the mikailis scale, an energy island in the shape of a hexagon can generate 250 megawatts of electricity, which can completely provide electricity for a small city; even if a plurality of energy islands are connected together, a small-sized island-like energy production base can be formed. The base can also provide sufficient greenhouse conditions for the growth of crops, can be used as a small port floating on the sea surface to provide berth for ships, and can also provide guesthouses and lodging for visitors.
Mikaelis builds islands of energy with the original intention of obtaining OTEC energy. The OTEC system has advantages over other ocean energy technologies in that it has the persistent characteristics: the system can be operated continuously 24 hours a day throughout the year.
At present, the largest ocean temperature difference is in tropical sea areas, the ocean surface is warmer, and the water temperature can be kept at 25 ℃. If warm sea water at the surface of the ocean is drawn from the vicinity of the energy island for evaporation to form the working medium, the resulting steam will drive the turbine to produce electricity. To cool the steam back to a liquid state, seawater at about 5 degrees celsius is drawn 0.5 miles below the sea surface for the cooling process, and this condensation process will create a pressure drop, thereby facilitating the drawing of more steam through the turbine blades.
Admittedly, offshore energy islands are a preferred solution for obtaining inexpensive energy. It can be used to transmit energy to shore through a submarine cable and also to separate hydrogen from water, and hydrogen fuel can be shipped to land to produce hydrogen fuel cells. According to Mikailis' name, the price of the electric energy generated by the offshore energy island is 9-13 cents per degree, and is determined according to the construction cost and the capital investment condition of the energy island. In addition, electrical energy is not the only energy source and product produced by the energy island, and if seawater is used as the working medium of the OTEC system, it will be desalinated during evaporation and condensation. In addition, ice-cold seawater drawn from the ocean at depth is rich in various nutrients and can also be used in fish farms or other aquaculture. According to the Mikelis, the energy island of the Mikelis can hopefully replace the petroleum resource widely used by human at present by the absolute advantage of energy reproduction. In its design, the OTEC system is centered in its energy island. It is not a pure OTEC system, but it has wind turbines and solar collectors on its 600 meter diameter platform.
Floating energy islands are not a new idea but the challenge is only that such floating energy islands have to be made cost competitive. While fossil fuels are inexpensive today, it is not true that new energy sources cannot compete with fossil fuels. Indeed, from now on, new power generation increments have been derived primarily from renewable energy sources-primarily wind and solar-rather than traditional thermal power. Electricity generated from the energy island will be cheaper and will become cheaper in the future.
The energy island design of mikelies is clearly desirable but not perfect and a series of improvements are needed. For example, its OTEC system is not efficient; and the dependence of the ocean renewable energy power generation such as wind energy, solar energy and the like on weather and ocean environment is higher, so that the output of the new energy power generation is always discontinuous, and mismatching between a power generation end and a power transmission and distribution terminal can be caused. Additionally, at least 6 billion dollars are currently required to build an offshore energy island, as estimated by mikelies, in its current design.
Therefore, significant improvements in the energy island of mikelies are necessary. Firstly, the construction and maintenance cost is required to be effectively reduced; secondly, the energy acquisition efficiency is effectively improved; thirdly, configuring a corresponding energy storage technology for the new energy.
The energy storage technology of the energy island is emphasized, the energy island is mainly built in deep and far sea in the future, and offshore power transmission has certain problems. However, we attach importance to the energy storage technology of the energy island, not only because of the offshore power transmission problem. In the long run, with the progress of science and technology and the development of society, the activities of human beings on the ocean are more frequent, and perhaps, the heat tide of ocean large development is coming; the sea is wide and unboiled, and energy is required in advance to develop the sea; the large-scale development of marine energy by human beings is accompanied by corresponding offshore energy storage. In recent years, with the increase of environmental awareness of human beings, the use of new energy sources to replace fossil fuels has become a global consensus, including marine transportation. The marine surface ship will gradually reduce the usage amount of marine diesel oil, and develop towards the direction of multi-energy complementation and comprehensive full electric propulsion by adopting an energy storage technology. Lithium iron phosphate batteries and solid state lithium batteries may represent current and future battery technologies for offshore energy storage, respectively, and their performance will be more compatible with the marine environment. By combining the application of various technologies, it is conceivable that a large number of self-navigation and self-positioning charging islands of wind power, photovoltaic and energy storage are possibly floated on the future ocean along the offshore silk road to provide charging service for passing ships and submarines; the large offshore platform forms an energy base integrating hydrogen energy storage and electric energy storage; a large number of battery-driven micro-sensor buoys are distributed in the ocean to form an ocean monitoring network, and the batteries are wirelessly charged by an ocean energy storage hub station.
In a word, an energy island which integrates marine comprehensive power generation and marine energy storage has emerged and has bright prospects. Offshore integrated power generation has qualitative leaps, offshore energy storage technology further promotes the development of the marine industry, and the leap development is carried out along with the marine development.
Disclosure of Invention
The invention aims to solve the technical problem of providing an economical and feasible offshore energy island design aiming at the problems existing and proposed in the background technology. The basic idea is to provide a large-scale offshore floating body structure, which can effectively reduce the manufacturing cost of the existing offshore energy island; secondly, the design idea that the OTEC system is taken as the center of the original offshore energy island is changed, the offshore energy comprehensive utilization is mainly used, and the energy output rate of the energy island is improved; thirdly, the energy storage function of the energy island is expanded, and the application range of the energy island is expanded; therefore, the practicability and the universality of the offshore energy island are fundamentally improved.
In order to solve the technical problems, the invention provides and adopts the following technical scheme.
A large-scale offshore floating energy island device comprises an offshore energy island main body platform 1 and a plurality of combined modular power generation and energy storage platforms 2; the offshore energy island main body platform 1 and each modular power generation and energy storage platform 2 are connected through an overwater gallery bridge; the main body platform 1 is a large-scale offshore floating platform, and is provided with a comprehensive power generation system, an electric energy storage system, an electric energy conversion system, an electric energy transmission system, an energy island intelligent control system, a seawater desalination system and the like; the modularized power generation and energy storage platform 2 is a modularized floating body platform, and an offshore photovoltaic power generation system, an offshore wind power generation system, an offshore wave power generation system, a distributed electric energy storage device, a distributed energy conversion and energy storage device and the like are respectively or jointly arranged on the modularized floating body platform; the offshore photovoltaic power generation system, the offshore wind power generation system, the offshore wave power generation system and the like are electrically connected with the distributed energy conversion and storage device and the distributed energy storage device on the floating body platform 2 and are finally electrically connected with the electric energy storage system and the electric energy conversion system on the main body platform 1; the electric energy transmission system and the electric energy conversion system are also electrically connected with the electric energy storage system; the electric energy storage system is also electrically connected with the seawater desalination system and used for providing electric energy for the seawater desalination system.
The energy island main body platform 1 is a large floating body platform and comprises a main body platform core supporting structure 11, a main body platform stable supporting structure 12 and a main body platform expansion supporting structure 13; the core supporting structure 11, the stable supporting structure 12 and the expansion supporting structure 13 are arranged from inside to outside, and the working table surface of the core supporting structure, the stable supporting structure and the expansion supporting structure is generally concentric and circular, square or hexagonal; the main body platform 1 and the peripheral modularized power generation and energy storage platform 2 are connected through galleries 3 respectively, so that the main body platform 1 and the peripheral modularized power generation and energy storage platform 2 can be connected into a whole.
The core support structure 11 of the main body platform is the core of the main body platform, belongs to a large floating structure, and comprises an upper reinforced deck structure 111, a middle support connecting structure 112 and a lower reinforced floating body structure 113. The lower reinforced floating body structure 113 is formed by fixedly connecting a plurality of floating boxes and is annular as a whole; the intermediate support connection structure 112 is a plurality of columns fixed to a reinforced buoyant structure 113; the lower reinforced floating body structure 113 is connected with the upper reinforced deck structure 111 through the middle support connecting structure 112, so that the safety characteristics of no disintegration and no sinking and floating of the whole platform structure under extremely severe sea conditions are achieved, and the life safety of personnel on the platform can be guaranteed while the whole safety of the floating platform structure is guaranteed.
The core supporting structure 11 of the main platform 1 is a main platform of the ocean thermal power generation system, and a workshop 116 and related equipment of the ocean thermal power generation system are configured on the main platform. To extract deep sea water, the platform has a hollow riser 114 extending into the deep sea.
The stable support structure 12 of the subject platform 1 comprises an upper deck structure 121 and a lower buoyant structure 122, the upper surface of the lower buoyant structure 122 being fixedly connected to the upper deck structure 121. An electric energy storage system, an electric energy conversion system, an electric energy transmission system, an energy island intelligent control system and/or a seawater desalination system and the like are arranged on the upper part of the stable support structure 12 of the main body platform.
The extended support structure 13 of the main body platform 1 includes an upper deck 131 and a lower buoyant structure 132, and an upper surface of the lower buoyant structure 132 is fixedly connected to the upper deck 131. An offshore integrated power generation system and the like are disposed above the extended support structure 13 of the main body platform.
The modularized power generation and energy storage platform 2 is a photovoltaic-wind-wave energy comprehensive power generation and energy storage platform and is mainly formed by combining a plurality of standardized buoyancy tank-buoy combined floating body structures 20 which can be quickly assembled, maintained and disassembled on the sea; the lower part of the standardized buoyant structure 20 is a closed box-like buoyant body 218 and an open-bottomed pontoon 219, which provides buoyancy for the platform; the upper part of the standardized floating body structure 20 is a supporting frame structure for supporting various facilities of a photovoltaic power generation system and a wind power generation system; the supporting frame structure comprises a framework component 21 and a quick connecting piece 23; the framework member 21 comprises cross beams 211, 212, upright rods 213 vertically fixed on the cross beams, and inclined diagonal rods 214 with one end fixed on the upright rods and the other end fixed on the cross beams; the diagonal rods are used for mounting the photovoltaic module. Due to the inclined arrangement of the inclined rods, the photovoltaic module is installed in an inclined mode, and therefore the maximum absorption of solar heat can be guaranteed.
The pontoons 218 and pontoons 219, respectively, at the lower portion of the standardized buoyant structure 20 are secured beneath the beams. The cross beam 212 or 221 is connected to a counterweight 24 via a mooring system. The buoyancy tanks and the buoys below the beams can enable the platform framework to float on the water surface. The counterweight block 24 can make the platform 2 have wind and wave resistance, and is safe and reliable.
An offshore wind power generation system and an offshore photovoltaic power generation system are arranged on the modularized power generation and energy storage platform 2. In order to effectively improve the energy acquisition efficiency of the energy island, in the invention, the offshore photovoltaic power generation system preferably adopts a dye-sensitized solar cell; in order to effectively improve the utilization rate of wind energy and reduce the influence of hurricanes, the bearing capacity of the floating platform is considered, and the offshore wind power generation system is preferably provided with a vertical axis wind power generation system and is provided with bionic structure blades. The simple structure of the fan blade of the vertical axis wind power generation system is shown in the attached figure 8 of the specification, and the fan blade is provided with an inner S-shaped blade and an outer wing-shaped blade.
Further, the platform 2 is equipped with a wave power system. At present, the offshore wave power generation mainly comprises the following three types: the energy receiving body is a rigid body, and the energy conversion mode is a wave power generation system for converting wave energy into mechanical energy, such as a wave power generation system of an oscillating float type, a pendulum type, a nodding duck type and a wave surface raft type; secondly, the energy receiver is a water body, and the energy conversion mode is a wave power generation system for converting wave energy into kinetic energy and potential energy, such as a contraction wave channel type wave power generation system; and thirdly, the energy receiver is air, and the energy conversion mode is a wave power generation system, such as an oscillating water column type wave power generation system, for converting wave energy into air energy. Of course, with the continuous innovation of the technology, some novel wave power generation devices are also emerging continuously, for example, devices for converting wave energy into electric energy by using piezoelectric polymers, nano-generators for generating electricity by using friction, and the like. In the present invention, the wave power generation is preferably a float wave power generation system.
The modular power generation and energy storage platform 2 further comprises an anchoring system and a power transmission and distribution system, wherein the anchoring system fixes the platform 2 on the sea in an anchoring mode, and the power transmission and distribution system mainly comprises a step-up transformer, a power transmission line, a step-down transformer and the like.
The two ends of the quick connector 23 of the standardized floating structure 20 are respectively matched with the connecting members of the previous platform member and the next platform member, and can be quickly connected to form the floating structures connected with each other; the transverse connection of the standardised floating body structure 20 comprises 4 connecting parts; when in connection, the two connecting members on the front platform component are respectively connected with the two platform framework connecting members on the rear platform component, and the two connecting members under the front platform component are respectively connected with the two platform framework connecting members under the rear platform component; the connecting member is circular in radial cross section. The longitudinal connection of the standardised floating body structure 20 comprises 3 connecting parts; when connected, the corresponding connection members may be quickly connected to each other by means of quick connections. The upper part may be used as a passage for personnel and equipment traffic, where lines or hawsers anchoring the standardised buoyant structures 20 at sea are provided near the connection of the individual buoyant structures.
At present, there are many energy storage technologies, such as mechanical energy storage, electrical energy storage, electrochemical energy storage, thermal energy storage, and chemical energy storage. The energy storage technology preferentially selected by the invention is a comprehensive energy storage technology which comprehensively utilizes a battery energy storage technology, a P2G energy storage technology and a buoyancy and gravity composite energy storage technology. In the invention, the buoyancy and gravity combined energy storage technology is an energy storage technology which combines compressed air energy storage and pumped water energy storage, and the basic principle and the simple structure of the energy storage technology are shown in the attached figure 11 of the specification. When energy is required to be stored, air is pressed into a buoy at the lower part of the platform, seawater is injected into a water tank at the upper part of the platform, and power is stored by utilizing buoyancy and gravity of the seawater; when the electric energy conversion is needed, seawater in the water tank at the upper part of the platform and compressed air in the buoy at the lower part of the platform are discharged simultaneously, so that power is generated for generating electricity.
The P2G energy storage technology combines a conventional power system with chemical energy storage, converts temporarily unused electric energy into chemical energy and stores the chemical energy, and converts the stored chemical energy into electric energy again through various power generation methods when the electric power is in short supply. In the invention, the P2G energy storage system comprises a seawater desalination device, a water electrolysis hydrogen production device, a compression hydrogen storage device and the like. Wherein, the high-purity hydrogen of the hydrogen storage system can be used as chemical raw materials to realize the electricity-hydrogen combined supply of the system.
In the invention, the energy output is combined by AC submarine cable output and large-capacity DC power transmission. When the offshore distance of the energy island is within 30km, the electric energy output is preferentially output through the alternating current submarine cable. When the offshore energy island offshore distance exceeds 60km, a direct current power transmission mode of large-capacity and long-distance power transmission is preferentially considered.
Compared with the prior art, the technical scheme of the invention has the following obvious advantages.
1. The offshore energy island platform adopts a partitioned modular construction technology, has small module unit mass, is easy to drag, and can realize quick assembly and disassembly; the construction is easy during the construction, and the construction cost is low; the floating structures are interconnected, so that the wind and wave resistance is higher, and the self-adjusting capacity of adapting to sea conditions is realized; the floating type platform can avoid the defect of complex conventional piling and fixing process, is simple to construct and convenient to install, and does not damage ecological environment; moreover, the whole assembly process is comprehensive and green, a series of unnecessary auxiliary assembly work such as welding, cutting and polishing is avoided, the assembly efficiency is high, and the construction period is short.
The energy island can fully utilize various renewable energy sources in the ocean, realize the integration of ocean power generation, offshore energy storage and seawater desalination, effectively improve the input-output ratio and ensure the stability of the power supply process.
The annular platform design of the energy island provided by the invention has the advantages of wide field, numerous accommodation devices and abundant activity space, can meet the multifunctional requirements of users, and can be used for small-scale construction and large-scale base construction.
4. The design of the energy island provided by the invention can realize internal electricity storage without depending on external output, produce energy and realize self-sufficiency of power, the most advanced photovoltaic power generation technology can realize high-efficiency capture of renewable energy, the hurricane influence can be reduced by matching a vertical axis wind power generation system, the utilization rate of various energy sources can be effectively improved by comprehensively utilizing the various energy sources, and an innovative solution is provided for the practicability and the large scale of the energy island.
Drawings
FIG. 1 is a schematic block diagram of the general layout of an offshore floating energy island according to the present invention;
FIG. 2 is a schematic perspective view of a floating energy island main platform at sea according to the present invention;
FIG. 3 is a side view of a floating energy island body platform at sea according to the present invention;
FIG. 4 is a perspective view of a core support structure of the offshore floating energy island body platform according to the present invention;
fig. 5 is a front view of a standardized buoyant structure 20 of the offshore floating energy island of the present invention constituting a modular power generation and storage platform 2, with a counterweight depicted;
fig. 6 is a front view of the standardized buoyant structure 20 of the offshore floating energy island of the present invention that constitutes the modular power generation and storage platform 2, not shown with a counterweight;
figure 7 is a side view of a standardized buoyant structure 20 forming a modular power generation and storage platform 2 for an offshore floating energy island according to the present invention;
FIG. 8 is a schematic view of a fan blade of a vertical axis wind turbine according to the present invention;
fig. 9 is a basic principle and a simple structural view of an auxiliary type wave power generation system according to an embodiment of the present invention;
FIG. 10 is a schematic block diagram of the basic principle of another auxiliary wave power system according to an embodiment of the invention;
fig. 11 is a basic principle and a simple structure diagram of the buoyancy and gravity combined energy storage facility in the embodiment of the invention.
In the figure, 1, an offshore energy island main body platform, 2, an offshore energy island modularized power generation and energy storage platform, 3 and an offshore energy island connecting gallery bridge; 11. a main body platform core supporting structure 12, a main body platform stable supporting structure 13 and a main body platform expansion supporting structure; 111. the main body platform core supporting structure 11 comprises an upper reinforcing deck structure of the main body platform core supporting structure 11, 112, a middle supporting connecting structure of the main body platform core supporting structure 11, 113, a lower reinforcing floating body structure of the main body platform core supporting structure 11, 114, a hollow vertical pipe of the main body platform core supporting structure 11, 116 and a workshop of an ocean temperature difference power generation system configured on the main body platform core supporting structure 11; 121. an upper deck structure of the main body platform stable support structure 12, 122, a lower floating structure of the main body platform stable support structure 12, 131, an upper deck of the main body platform extended support structure 13, 132, a lower floating structure of the main body platform extended support structure 13; 20. the combined floating body structure of the modularized power generation and energy storage platform 2, 21 skeleton members of the combined floating body structure of the modularized power generation and energy storage platform 20, 23 quick connecting pieces of the combined floating body structure of the modularized power generation and energy storage platform 20, 24 lower balancing weights of the combined floating body structure of the modularized power generation and energy storage platform 20; 211. longitudinal upper beams of the framework members 21, 212, longitudinal lower beams of the framework members 21, 213, vertical rods of the framework members 21, 214, diagonal rods of the framework members 21, 215, wind power generation devices arranged on the framework members 21, 217, short vertical rods of the framework members 21, 218, box-shaped floats at the lower parts of the floating body structures 20, 219, buoys at the lower parts of the floating body structures 20, 220 and transverse beams of the framework members 21; 221. the transverse lower beam of the skeleton member 21; 223. a transverse support bar of the skeleton member 21; 41. the inner S-shaped blade 42 of the fan, the outer wing-shaped blade 43 of the fan, the vertical shaft 44 of the fan and the transverse support of the fan are arranged; 45. the device comprises a floater 46, a piston 47, a generator 48, a generator impeller 49 and a one-way water valve; 51. the wave energy power generation system comprises an air bag of the wave energy power generation system, a one-way air inlet valve of the 52 wave energy power generation system air bag, a one-way air outlet valve of the 53 wave energy power generation system air bag; 54. the wave energy power generation system comprises a compressed air storage cabinet 55 of the wave energy power generation system, an impeller generator 56 of the wave energy power generation system, a fixed deck 57 of the wave energy power generation system and a fixed upright post of the wave energy power generation system; 60. the system comprises a deck of the buoyancy and gravity composite energy storage facility, 61 a water storage tank of the buoyancy and gravity composite energy storage facility, 62 a compressed air cabinet of the buoyancy and gravity composite energy storage facility, 63 a water pump of the buoyancy and gravity composite energy storage facility, 64 an air pump of the buoyancy and gravity composite energy storage facility, 65 a generator of the buoyancy and gravity composite energy storage facility, and 66 a generator of the buoyancy and gravity composite energy storage facility.
The method is implemented specifically.
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not necessarily all exemplary embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
Referring to fig. 1, the large-scale offshore floating energy island device of the invention comprises an offshore energy island main body platform 1 and a plurality of modularized power generation and energy storage platforms 2; the offshore energy island main body platform 1 and each modularized power generation and energy storage platform 2 are connected through an overwater gallery bridge 3, so that the main body platform 1 can be connected with the peripheral modularized power generation and energy storage platforms 2 into a whole. The main body platform 1 is a large-scale offshore floating platform, and is provided with a comprehensive power generation system, an electric energy storage system, an electric energy conversion system, an electric energy transmission system, an energy island intelligent control system, a seawater desalination system and the like; the modularized power generation and energy storage platform 2 is a modularized floating body platform, and an offshore photovoltaic power generation system, an offshore wind power generation system, an offshore wave power generation system, a distributed electric energy storage device, a distributed energy conversion and energy storage device and the like are respectively or jointly arranged on the modularized floating body platform; the offshore photovoltaic power generation system, the offshore wind power generation system, the offshore wave power generation system and the like are electrically connected with the distributed energy conversion and storage device and the distributed energy storage device on the floating body platform 2 and are finally electrically connected with the electric energy storage system and the electric energy conversion system on the main body platform 1; the electric energy transmission system and the electric energy conversion system are also electrically connected with the electric energy storage system; the electric energy storage system 11 is further electrically connected with the seawater desalination system 15 and is used for providing electric energy for the seawater desalination system 15.
Referring to fig. 2 and 3, the energy island main body platform 1 of the invention is a large floating body platform, and comprises a main body platform core support structure 11, a main body platform stable support structure 12 and a main body platform expansion support structure 13; the core support structure 11, the stable support structure 12 and the expansion support structure 13 are arranged from inside to outside, and the working table surfaces of the core support structure, the stable support structure and the expansion support structure are concentric circles, squares or hexagons.
Referring to fig. 3 and 4, the core support structure 11 of the main body platform is the core of the main body platform, and belongs to a large floating structure, and comprises an upper reinforced deck structure 111, an intermediate support connection structure 112 and a lower floating structure 113; the lower floating body structure 113 is formed by fixedly connecting a plurality of floating boxes and is annular as a whole; the intermediate support connection structure 112 is a plurality of columns fixed to the floating structure; the lower floating body structure 113 is connected with the upper reinforced deck structure 111 through the middle support connecting structure 112, so that the safety characteristics of no disintegration and no sinking and floating of the whole platform structure under extremely severe sea conditions are achieved, and the life safety of personnel on the platform can be guaranteed while the whole safety of the floating platform structure is guaranteed.
The core supporting structure 11 of the main body platform 1 is a main platform of the ocean temperature difference power generation system. A work shop 116 and equipment on which an ocean thermoelectric generation system is deployed. To take water, the platform has a hollow riser 114 extending to the deep sea; the stable support structure 12 of the subject platform 1 comprises an upper deck structure 121 and a lower buoyant structure 122, the upper surface of the lower buoyant structure 122 being fixedly connected to the upper deck structure 121. An electric energy storage system, an electric energy conversion system, an electric energy transmission system, an energy island intelligent control system and/or a seawater desalination system and the like are arranged at the upper part of the stable supporting structure 12 of the main body platform; the extended support structure 13 of the main body platform 1 includes an upper deck 131 and a lower buoyant structure 132, and an upper surface of the lower buoyant structure 132 is fixedly connected to the upper deck 131. An offshore integrated power generation system and the like are disposed above the extended support structure 13 of the main platform.
Referring to fig. 5, 6 and 7, the modular power generation and energy storage platform 2 is a photovoltaic-wind power integrated power generation and energy storage platform, and is mainly composed of a plurality of standardized buoyancy tank-buoy combined type floating body structures 20 which can be rapidly assembled, maintained and disassembled on the sea, wherein the lower parts of the standardized floating body structures 20 are closed box-shaped floating bodies 218 and buoys 219 with openings at the bottoms to provide buoyancy for the platform; the upper part is a supporting frame structure which is used for supporting various facilities of the photovoltaic power generation system and the wind power generation system; the supporting frame structure comprises a framework component 21 and a quick connecting piece 23; the framework members comprise cross beams 211 and 212, upright rods 213 vertically fixed on the cross beams, and inclined oblique rods 214 with one end fixed on the upright rods and the other end fixed on the cross beams; the diagonal rods are used for mounting the photovoltaic module. Due to the inclined arrangement of the inclined rods, the photovoltaic module is installed in an inclined mode, and therefore the maximum absorption of solar heat can be guaranteed.
The pontoons 218 and pontoons 219, respectively, at the lower portion of the standardized buoyant structure 20 are secured beneath the beams. The cross beam 212 or 221 is connected to a counterweight 24 via a mooring system. The buoyancy tank and the buoy below the cross beam can enable the platform framework to float on the water surface. The counterweight block 24 can make the platform 2 have wind and wave resistance, and is safe and reliable.
An offshore wind power generation system and an offshore photovoltaic power generation system are arranged on the modularized power generation and energy storage platform 2. In order to effectively improve the energy acquisition efficiency of the energy island, the offshore photovoltaic power generation system preferably adopts a dye-sensitized solar cell; furthermore, a micro-nano multiple optical trap type solar hybrid power generation integrated device is preferably selected; the device comprises a micro-nano multiple optical trap generator, a photovoltaic generator and a thermoelectric generator, which are compounded to form an integrated structure; the micro-nano multiple optical trap generator comprises three micro-nano material array layers, two transparent electrode layers and two elastic cushion layers, and a multiple optical trap power generation structure is formed by the three micro-nano material array layers, the two transparent electrode layers and the two elastic cushion layers; the device has the comprehensive effects of micro-nano multiple light trapping power generation effect, piezoelectric friction power generation effect, photovoltaic multiple power generation effect and thermoelectric power generation effect, and can obviously improve the comprehensive utilization rate of solar energy. The transparent conductive electrode layer is a transparent conductive film and comprises a graphene film and a graphene composite film. The micro-nano material in the micro-nano material array layer comprises a nano or micro-nano composite material; the micro-nano material array layer forms a multiple light trap structure characteristic, and multiple reflection or refraction can be formed by utilizing the irradiation of sunlight.
Although the current horizontal-axis fan is a mainstream machine type, the horizontal-axis fan occupies most market share. But the vertical axis fan has the characteristics of no need of wind alignment, no need of yaw mechanism and control, low installation and maintenance cost because the power generation and control system is installed close to the ground, easy processing and manufacturing of blades, low manufacturing cost, low operation rotating speed, low noise and the like. Offshore wind power has the characteristics of high wind speed, low wind shear, low turbulence and high output, the annual average wind speed at sea is obviously higher than that of land, and the wind speed at sea of 10km away from the sea is higher than that of land by more than 25 percent due to lower roughness of the sea surface. However, offshore wind power also puts higher requirements on wind turbine equipment, namely, the pile foundation and the tower, the wind load resistance of the wind turbine, the corrosion resistance of offshore salt fog, and the high requirements on installation and maintenance of the wind turbine equipment. However, the blades of the conventional vertical axis wind turbine are mostly in a cantilever support form, and have some obvious disadvantages, such as: the main structure of the whole equipment is cantilever support, and the support and stress state of the vertical blade is complex; the problems are particularly prominent particularly when the fan is large-sized. In addition, it is very difficult and complicated for a vertical axis wind turbine to achieve pitch control of the blades. In order to effectively improve the utilization rate of wind energy and reduce the influence of hurricane, the bearing capacity of the floating platform is considered, and in the invention, the offshore wind power generation system is preferably a blade floating type vertical axis wind power generation system and is provided with bionic structure blades. One of its configurations is shown in fig. 8.
Further, the platform 2 is configured with a variety of wave energy power generation systems. Offshore wave power generation can be divided into three categories: the energy receiver is a rigid body, and the energy conversion mode is that wave energy is converted into mechanical energy, such as an oscillating float type, a pendulum type, a nodding duck type and a wave surface raft type; the energy receptor is a water body, and the energy conversion mode is that wave energy is converted into kinetic energy and potential energy, such as a contraction wave channel type; the energy receptor is air, and the energy conversion mode is that wave energy is converted into air energy, such as an oscillating water column. With the continuous innovation of the technology, novel power generation devices are emerging continuously, such as the conversion of wave energy into electric energy by utilizing piezoelectric polymers, the generation of electricity by adopting friction nano-materials and the like. In the invention, a nodding duck-type floater wave energy power generation system is preferably used for wave energy power generation. In order to increase the comprehensive power generation efficiency, two auxiliary wave energy power generation systems are added in the embodiment of the invention, and the basic principle and the schematic diagram are respectively shown in fig. 9 and fig. 10.
The modular power generation and energy storage platform 2 further comprises an anchoring system, a power transmission and distribution system and an energy storage system. The anchoring system can fix the platform on the sea in an anchoring mode. The platform energy storage system consists of an electrolytic cell, a hydrogen storage tank and a fuel cell. The power transmission and distribution system comprises a boosting transformer, a power transmission line, a step-down transformer and the like.
The two ends of the quick connector 23 of the standardized floating structure 20 are respectively matched with the connecting members of the previous platform member and the next platform member, and can be quickly connected to form the floating structures connected with each other; the transverse connection of the standardised floating body structure 20 comprises 4 connecting parts; when in connection, the two connecting members on the front platform component are respectively connected with the two platform framework connecting members on the rear platform component, and the two connecting members under the front platform component are respectively connected with the two platform framework connecting members under the rear platform component; the radial cross-section of the connecting member is circular. The longitudinal connection of the standardised floating body structure 20 comprises 3 connecting parts; when connected, the corresponding connection members may be quickly connected to each other by means of quick connections. The upper part may be used as a passage for personnel and equipment to pass by where the lines or hawsers anchoring the standardised buoyant structures 20 at sea are placed near the connection of the individual buoyant structures.
At present, there are many energy storage technologies, such as mechanical energy storage, electrical energy storage, electrochemical energy storage, thermal energy storage, and chemical energy storage. The preferred energy storage technology of the invention is a comprehensive energy storage technology which comprehensively uses a battery energy storage technology, a P2G energy storage technology and a buoyancy and gravity composite energy storage technology. In the invention, the buoyancy and gravity composite energy storage technology is an energy storage technology which jointly uses compressed air energy storage and pumped water energy storage. The basic principle and simple structure of the device are shown in fig. 11. When energy is required to be stored, air is pressed into the lower underwater buoy, and meanwhile, seawater is injected into the offshore upper water tank, and power is stored by utilizing buoyancy and gravity of the seawater; when the electric energy conversion is needed, the seawater in the upper water tank and the compressed air in the lower buoy are discharged simultaneously, so that power is generated for generating electricity.
In the invention, the sea isThe energy storage system comprises a P2G energy storage system. The P2G energy storage system combines the power generation system with the chemical energy storage, can convert the electric energy which can not be connected to the grid into the chemical energy and store the chemical energy, and converts the stored energy into the electric power again through a plurality of power generation methods when the electric power is in shortage. In the invention, the P2G energy storage system comprises a seawater desalination device, a water electrolysis hydrogen production device, a compression hydrogen storage device and the like. Wherein, the high-purity hydrogen of the hydrogen storage system can be used as chemical raw materials to realize the electricity-hydrogen combined supply of the system. In the invention, the energy storage working process of the P2G energy storage system is as follows: renewable energy sources on the sea, including solar energy, wind energy, wave energy and the like, are converted into alternating current by utilizing a renewable energy source acquisition device and a power generation device, and then are converted into direct current through a rectifier; the seawater is converted into water capable of being electrolyzed by a filtering and desalting device, and then is electrolyzed by an electrolysis device to generate H 2 And O 2 And then separated into pure H by a gas separation device 2 And O 2 。
In the invention, the energy output is combined by AC submarine cable output and large-capacity DC power transmission. When the offshore distance of the energy island is within 30km, the electric energy output is preferentially output through the alternating current submarine cable. When the offshore energy island offshore distance exceeds 60km, a direct current power transmission mode of large-capacity and long-distance power transmission is preferentially considered. An offshore converter station is also required to be built by adopting an offshore energy island with direct-current transmission.
Claims (3)
1. A sea floating energy island is characterized in that the sea floating energy island is composed of a sea energy island main body platform 1 and a plurality of modularized power generation and energy storage platforms 2; the main body platform 1 is a large-scale offshore floating platform, and is provided with an offshore comprehensive power generation system, an offshore electric energy storage system, an offshore electric energy conversion system, an offshore electric energy transmission system, an offshore energy island intelligent control system, a seawater desalination system and the like; the modularized power generation and energy storage platform 2 is a combined type modularized floating body platform, and an offshore photovoltaic power generation system, an offshore wind power generation system, an offshore wave power generation system, an offshore distributed electric energy storage device, an offshore distributed energy conversion and energy storage device and the like are arranged on the modularized power generation and energy storage platform respectively or jointly; the energy island main body platform 1 comprises a main body platform core supporting structure 11, a main body platform stable supporting structure 12 and a main body platform expansion supporting structure 13; the core supporting structure 11, the stable supporting structure 12 and the expansion floating body structure 13 are arranged from inside to outside, and the working table surface of the core supporting structure, the stable supporting structure and the expansion floating body structure is generally concentric and circular, hexagonal or square; the main body platform 1 and the peripheral modularized power generation and energy storage platform 2 are connected through galleries 3 respectively, so that the main body platform 1 and the peripheral modularized power generation and energy storage platform 2 can be connected into a whole; the core supporting structure 11 of the main body platform is the core of the main body platform 1, belongs to a large floating structure, and comprises an upper reinforced deck structure 111, a middle supporting and connecting structure 112 and a lower floating body structure 113; the lower floating body structure 113 of the core supporting structure 11 of the main body platform is formed by fixedly connecting a plurality of floating boxes and is annular as a whole; the middle support connection structure 112 of the core support structure 11 of the main body platform is a plurality of upright posts fixed on the lower floating body structure 113; the lower buoyant structure 113 of the core support structure 11 of the subject platform is connected to the upper reinforced deck structure 111 by an intermediate support connection structure 112; the upper part of the core supporting structure 11 of the main body platform 1 is provided with a workshop 116 of an ocean thermoelectric power generation system and related equipment thereof, and the middle part of the platform is provided with a hollow riser 114 which extends to the deep sea; the stable support structure 12 of the main body platform 1 comprises an upper deck structure 121 and a lower floating structure 122, wherein the upper surface of the lower floating structure 122 is fixedly connected with the upper steel deck structure 121; an offshore electric energy storage system, an offshore electric energy conversion system, an offshore electric energy transmission system, an offshore energy island intelligent control system and/or a seawater desalination system and the like are configured at the upper part of the stable support structure 12 of the main body platform; the expansion supporting structure 13 of the main body platform 1 comprises an upper deck 131 and a lower floating structure 132, wherein the upper surface of the lower floating structure 132 is fixedly connected with the upper deck 131; and an offshore wind power-photovoltaic-wave energy comprehensive power generation system is arranged at the upper part of the expansion supporting structure 13 of the main body platform.
2. The offshore floating energy island of claim 1, wherein the modular power generation and energy storage platform 2 is a photovoltaic-wind-wave energy integrated power generation and energy storage platform, which is assembled from a plurality of standardized buoyancy tank-buoy combined floating body structures 20 that can be quickly assembled, maintained and disassembled offshore; the lower part of the standardized floating body structure 20 is provided with a closed box-shaped floating body 218 and a floating barrel 219 with an opening at the bottom, and the upper part is provided with a platform supporting frame structure which is used for supporting various facilities of a photovoltaic power generation system and a wind power generation system and the like; the platform supporting frame structure comprises a framework member and a quick connecting piece; the skeletal member includes vertical uprights 212 and cross members 211 and 221 secured transversely thereto, as well as diagonal members 213 secured at one end to cross member 212 and at the other end to cross member 211; the diagonal rod 213 is provided with a photovoltaic module; the buoyancy tank and the buoy are respectively fixed below the cross beam 211; the cross beam 211 or 221 is connected with a balancing weight 24 through a mooring system; an offshore wind power generation system and an offshore photovoltaic power generation system are arranged on the modular power generation and energy storage platform 2; in the invention, the offshore photovoltaic power generation system preferably adopts a dye-sensitized solar cell, the offshore wind power generation system preferably adopts a vertical axis wind power generation system, and the vertical axis wind power generation system preferably adopts a bionic blade.
3. The offshore floating energy island device of claims 1 and 2, wherein the energy storage technology selected for use in the invention is a comprehensive energy storage technology that comprehensively uses a lithium battery energy storage technology, a P2G energy storage technology, a buoyancy and gravity composite energy storage technology; in the invention, the P2G energy storage technology is a technology for producing hydrogen and oxygen by electrolyzing desalinated seawater, and the buoyancy and gravity composite energy storage technology is an energy storage technology for jointly applying compressed air energy storage and water pumping energy storage.
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