CN112606962A - Offshore wind power floating foundation integrated with electrochemical energy storage device - Google Patents
Offshore wind power floating foundation integrated with electrochemical energy storage device Download PDFInfo
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
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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
- F03D9/10—Combinations of wind motors with apparatus storing energy
- F03D9/19—Combinations of wind motors with apparatus storing energy storing chemical energy, e.g. using electrolysis
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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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
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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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- 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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/28—The renewable source being wind energy
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/727—Offshore wind turbines
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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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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- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ocean & Marine Engineering (AREA)
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Abstract
The lower part of the floating supporting platform is connected with the gravity type anchoring structure through a mooring cable, a wind driven generator is positioned at the upper part of the floating supporting platform and connected with the floating supporting platform, the electrochemical energy storage device is positioned inside the gravity type anchoring structure, the electrochemical energy storage device is connected with the wind driven generator through a cable, a sea cable is connected with the electrochemical energy storage device to lead out the gravity type anchoring structure and is connected with a power grid, and the electrochemical energy storage device adjusts electric energy input to the power grid by the wind driven generator in real time or periodically according to the power output characteristic of the wind driven generator. The offshore wind power generation system has the characteristics of simple structure, good stability and good adaptability, and effectively reduces or eliminates the impact of overlarge fluctuation of the existing offshore wind power to the power grid.
Description
Technical Field
The invention belongs to the technical field of offshore floating wind power, and relates to an offshore wind power floating foundation integrated with an electrochemical energy storage device.
Background
With the carbon neutralization advanced by the country, clean energy such as offshore wind power becomes an important part of the national energy system. However, the output power of the wind driven generator is closely related to the wind speed, and is influenced by the fluctuation of the wind speed on the sea, so that the output power of the wind driven generator is unstable and has the characteristics of intermittence, randomness and the like. At present, the development amount of offshore wind power in China is relatively small, the fluctuation of the wind power has no obvious influence on the stability of a power grid, but along with the large-scale development of the offshore wind power, the problem of solving the fluctuation of the offshore wind power becomes a key place for consuming the offshore wind power. The development mode of offshore wind power and energy storage is more and more emphasized, namely, an offshore wind power plant is matched with energy storage in a certain proportion to avoid wind and electricity abandonment. At present, offshore wind power can not realize net surfing at a flat price, and if the energy storage cost is added, the total investment cost of the offshore wind power becomes a restriction factor for the development of the offshore wind power industry.
At present, an energy storage power station is usually established for offshore wind power energy storage, and centralized energy storage is performed. If the energy storage power station is built on land, a large land area is occupied, and if the energy storage power station is built on the sea, a special platform needs to be built, so that the cost is relatively high. With the offshore wind farm going from offshore to deep and open sea, the foundation form of the offshore wind farm will be mainly floating foundation, and it will be a huge investment to build the floating platform of the energy storage power station. Therefore, a novel, efficient and low-cost electrochemical energy storage mode is urgently needed to be provided, the output power of the offshore wind driven generator can be adjusted, and a platform special for an energy storage power station can be avoided.
Disclosure of Invention
The invention aims to solve the technical problem of providing an offshore wind power floating foundation integrated with an electrochemical energy storage device, wherein the floating foundation is in a tension leg type, the lower part of a floating supporting platform is connected with a gravity type anchoring structure through a mooring cable, a wind driven generator is positioned at the upper part of the floating supporting platform and is connected with the floating supporting platform through a supporting structure, the electrochemical energy storage device is integrated in the gravity type anchoring structure, the floating platform of an electrochemical energy storage power station is not required to be built, the electrochemical energy storage device is connected with the wind driven generator through a cable, a sea cable is connected with the electrochemical energy storage device and led out of the gravity type anchoring structure, the electrochemical energy storage device adjusts the output power of the wind driven generator in real time or periodically according to the power output characteristic of the wind driven generator, the stability is good, the adaptability is good, and the impact of the existing.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: an offshore wind power floating foundation integrated with an electrochemical energy storage device comprises a floating support platform, a gravity type anchoring structure and the electrochemical energy storage device; the electrochemical energy storage device is positioned in the gravity type anchoring structure; the gravity type anchoring structure is positioned on the seabed at the lower part of the floating type supporting platform and is connected with the floating type supporting platform; the electrochemical energy storage device comprises a core energy storage element, an electric energy control system and a battery management system, wherein the electric energy control system and the battery management system are connected with the core energy storage element; the core energy storage element is one or a plurality of combinations of a ternary lithium battery, a lithium iron phosphate battery and a solid-state lithium battery.
The floating type supporting platform is connected with the wind driven generator through a supporting structure to support the wind driven generator to run safely and stably, the floating type supporting platform is connected with the gravity type anchoring structure through a mooring cable to limit the movement of the floating type supporting platform under the action of wind, wave and current loads, the electrochemical energy storage device is placed in the inner space of the gravity type anchoring structure in the construction process of the gravity type anchoring structure, and a seawater cooling system is arranged in the gravity type anchoring structure to keep the temperature and humidity of the inner space so as to meet the requirement of the electrochemical energy storage device on the environment. The floating type supporting platform, the gravity type anchoring structure, the electrochemical energy storage device and the wind driven generator are integrally designed and built, the building and assembling processes are completed on land, the offshore operation processes and time are reduced, the floating type supporting platform and the gravity type anchoring structure are fixed into a whole in the wet supporting process, small ships can be fully utilized for transportation, and meanwhile, the gravity type anchoring structure sinks to the seabed under the action of self weight, so that the offshore construction difficulty is reduced.
According to some embodiments of the present invention, the floating support platform comprises a base-connected pontoon, a support rod, a tension adjustment mechanism, and a support structure, the wind turbine is connected to the support structure, and the gravity anchor structure is connected to the floating support platform through the tension adjustment mechanism and a mooring line.
According to some embodiments of the present invention, the gravity type anchoring structure is made of concrete, reinforced concrete, and rock-fill concrete, and has a hollow structure inside, and a seawater cooling system is disposed around the energy storage space of the gravity type anchoring structure.
According to some embodiments of the invention, the electrochemical energy storage device is connected with the wind driven generator by a cable, and the submarine cable is connected with the electrochemical energy storage device and led out of the gravity type anchoring structure. When the wind driven generator is used, electric energy generated by the wind driven generator is transmitted to the electrochemical energy storage device through the cable to be stored, and the submarine cable is connected with the electrochemical energy storage device and is led into a power grid.
According to some embodiments of the invention, the electrochemical energy storage device adjusts the energy storage and discharge strategies according to the real-time output power and the short-time power predicted value of the wind driven generator.
The invention has the advantages and positive effects that:
1. by utilizing the gravity type anchoring structure at the lower part of the floating type foundation of the offshore wind power, the electrochemical energy storage device is integrated in the inner space of the gravity type anchoring structure, and the design, construction and maintenance costs caused by the construction of a platform special for a centralized electrochemical energy storage power station are avoided. The gravity type anchoring structure is built by adopting concrete, reinforced concrete or rock-fill concrete, and the cost of the floating foundation is favorably reduced.
2. When the output power of the wind driven generator is higher than the power grid side requirement, the electrochemical energy storage device stores the surplus electric energy in the electrochemical energy storage device, and when the generated energy of the wind driven generator is lower than the power grid side requirement, the electrochemical energy storage device releases the electric energy. The electrochemical energy storage device carries out real-time and periodic adjustment on a storage mode according to the output power of the wind driven generator, reduces or eliminates the fluctuation of the offshore wind power input into the power grid, and improves the absorption capacity of the power grid on offshore wind power.
3. The offshore wind power floating foundation integrated with the electrochemical energy storage device utilizes electrochemical energy storage to realize self-starting power generation of the wind driven generator under the condition that the wind driven generator is disconnected from a power grid, and also provides stable electric energy for key loads of the wind driven generator to ensure normal operation and maintenance of auxiliary equipment of the wind driven generator during power failure of an offshore wind power plant.
4. The floating support platform, the gravity type anchoring structure, the electrochemical energy storage device and the wind driven generator are systematically designed, built, assembled and constructed, and the total investment cost of offshore wind power is reduced. When the gravity type anchoring structure adopts modular design and assembly, the maintenance of the electrochemical energy storage device is more convenient.
5. The offshore wind power floating foundation integrated with the electrochemical energy storage device is suitable for sea areas with water depths of 30-350m, and meanwhile, the upper part of the floating supporting platform supports a plurality of 10-20MW wind driven generators according to design requirements.
6. The floating support structure is connected to the gravity type anchoring structure through a mooring cable, and the mooring system comprises a tensioning type or a catenary type, so that the offshore wind power floating type foundation is guaranteed to adapt to different marine environments and engineering requirements.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the arrangement of the gravity anchor structure and the electrochemical energy storage device of the present invention.
Fig. 3 is a schematic view of another arrangement of the gravity anchor structure and electrochemical energy storage device of the present invention.
Fig. 4 is another schematic structural diagram of the present invention.
In the figure: the system comprises a floating support platform 1, a buoy 11, a support rod 12, a tension adjusting mechanism 13, a support structure 14, a gravity type anchoring structure 2, an electrochemical energy storage device 3, a core energy storage element 31, an electric energy control system 32, a battery management system 33, a wind driven generator 4, a mooring cable 5, an electric cable 6, a submarine cable 7 and a seawater cooling system 8.
Detailed Description
As shown in fig. 1 to 4, an offshore wind power floating foundation integrated with an electrochemical energy storage device comprises a floating support platform 1, a gravity anchoring structure 2 and an electrochemical energy storage device 3; the floating support platform 1 comprises a buoy 11, a support rod 12, a tension adjusting mechanism 13 and a support structure 14 which are connected through a base; the electrochemical energy storage device 3 comprises a core energy storage element 31, an electric energy control system 32 and a battery management system 33, wherein the electric energy control system 32 and the battery management system 33 are connected with the core energy storage element 31; and a seawater cooling system 8 is arranged around the energy storage space of the gravity type anchoring structure 2 in a surrounding manner. The wind generator 4 is connected with the support structure 14; the gravity type anchoring structure 2 is connected with the floating type supporting platform 1 through a tensioning adjusting mechanism 13 and a mooring cable 5; the electrochemical energy storage device 3 is located in the inner space of the gravity type anchoring structure 2. The electrochemical energy storage device 3 is connected with the wind driven generator 4 through a cable 6, and a submarine cable 7 is connected with the electrochemical energy storage device 3 to lead out the gravity type anchoring structure 2 and is connected with a power grid. The electrochemical energy storage device 3 adjusts the power input to the power grid in real time or periodically according to the power output characteristics of the wind driven generator 5, and effectively reduces or eliminates the impact of the overlarge fluctuation of the existing offshore wind power on the power grid.
It is worth mentioning that the main structure of the floating support platform 1 comprises a pontoon 11, a support rod 12 and a support structure 14, wherein the support rod 12 is connected with a plurality of pontoons, and the support structure 14 is fixed on the upper portion of the support rod 12. Gravity type anchor mechanism 2 adopts concrete, reinforced concrete, rock-fill concrete, steel construction preparation to form, and gravity type anchor structure 2 provides the mooring force for floating supporting platform 1, and under the effect of limit mooring force, gravity type anchor structure 2 can not take place to remove and incline to guarantee electrochemical energy storage device 3 at the inside stability of gravity type anchor structure 2, gravity type anchor structure 2 still include jointly use with suction section of thick bamboo, anchor pile. The seawater cooling system 8 ensures the temperature of the internal space of the gravity type anchoring structure 2 by using low-temperature seawater. The electric energy control system 32 adjusts the storage mode of the core energy storage element 31 through the battery management system 33, and the electric energy control system 32 predicts the output power of the wind driven generator.
In a preferred embodiment, the floating support platform 1 further comprises a tension adjustment mechanism 14 connected to the base, the tension adjustment mechanism 14 being connected to the mooring line 5. When the floating type supporting platform is used, when the sea state of the sea changes, the tension degree between the mooring cable 5 and the gravity type anchoring structure 2 is adjusted through the tension adjusting mechanism 14, the stability of the floating type supporting platform 1 is improved, and the floating type supporting platform is suitable for the sea environment under different sea states.
Preferably, the tension adjustment mechanism 14 is a wheel tension or chain tension mechanism.
In a preferred scheme, the gravity type anchoring structure 2 is a prefabricated block body, an energy storage space is arranged in the center of the prefabricated block body, and the electrochemical energy storage device 3 is located in the energy storage space. When the device is used, the electrochemical energy storage device 3 is positioned in the energy storage space of the gravity type anchoring structure 2, so that the space is saved, the corrosion of the marine environment is avoided, and the service life is prolonged.
Preferably, the gravity anchor structure 2 is a prefabricated module structure made of concrete materials or steel materials, which is convenient for mass construction and assembly and saves cost.
Preferably, the gravity type anchoring structure 2 is further used in combination with a suction tube or an anchor pile to provide a mooring force of the floating support platform 1 for fixed-point fixing in a certain sea area, so that the stability of the floating support platform 1 is further improved, and the stable operation of the electrochemical energy storage device 3 in the gravity type anchoring structure 2 is ensured.
In a preferred scheme, a seawater cooling system 8 is arranged around the energy storage space of the gravity anchoring structure 2. The structure is simple, and the seawater cooling system 8 arranged around the energy storage space is used for absorbing part of heat emitted by the electrochemical energy storage device 3 and transferring the heat to seawater, so that the electrochemical energy storage device 3 works at a set environmental temperature, and the running stability of the electrochemical energy storage device is improved.
In a preferred scheme, the electrochemical energy storage device 3 comprises a core energy storage element 31, an electric energy control system 32 and a battery management system 33, wherein the electric energy control system 32 and the battery management system 33 are connected with the core energy storage element 31, the cable 6 and the submarine cable 7. When the wind driven generator is used, the electric energy control system 32 controls the charging and discharging of the core energy storage element 31, the output power of the wind driven generator 4 is predicted in time, and the battery management system 33 is used for managing the core energy storage element 31. The running states of the wind driven generator 4 and the electrochemical energy storage device 3 are transmitted to a centralized control center in real time through a submarine cable 7, and the centralized control center regulates and controls the running modes of the wind driven generator 4 and the electrochemical energy storage device 3 through optical fibers in the submarine cable 7.
Preferably, the electrochemical energy storage device 3 adjusts the energy storage and release strategy according to the real-time power and the short-time power predicted value of the wind driven generator 4.
Preferably, when the power generation amount of the wind driven generator 4 is higher than the power grid side requirement, the output power of the wind driven generator 4 is higher, the electrochemical energy storage device 3 stores part of the electric energy, when the power generation amount of the wind driven generator 4 is lower than the power grid side requirement, the output power of the wind driven generator 4 is lower, and the electrochemical energy storage device 3 releases part of the electric energy, namely according to the power output characteristic of the wind driven generator on the upper portion of the floating support platform 1, the real-time and periodic adjustment of the output power of the wind driven generator is realized, the electric energy input to the power grid is ensured to have smaller fluctuation, the electric energy quality is improved, and the absorption capacity of the power grid to offshore.
Preferably, the electrochemical energy storage device 3 is modular in design and construction, improving versatility and reducing cost.
Preferably, the electrochemical energy storage device 3 is designed and constructed in a modular manner, which facilitates replacement and maintenance of the electrochemical energy storage device 3, and when a part of the electrochemical energy storage devices 3 inside the casing fails, the other electrochemical energy storage devices 3 inside the casing still work normally.
In a preferred embodiment, the core energy storage element 31 is one or a combination of a ternary lithium battery, a lithium iron phosphate battery, and a solid-state lithium battery.
In a preferred embodiment, the number of the wind power generators 4 is one or more. When the wind driven generator is used, one or more wind driven generators 4 are installed on a single floating support platform 1 according to different sea conditions, and the utilization rate of wind energy is improved.
Preferably, when the wind power generator 5 is one, the support structure 14 is a single column structure.
Preferably, when there are two wind power generators 5, the support structure 14 is a "V" shaped structure.
When the offshore wind power floating foundation integrating the electrochemical energy storage device is installed and used, the lower part of the floating supporting platform 1 is connected with the gravity type anchoring structure 2 through the mooring cable 5, the wind driven generator 4 is positioned at the upper part of the floating supporting platform 1 and connected with the floating supporting platform, the electrochemical energy storage device 3 is positioned inside the gravity type anchoring structure 2, the electrochemical energy storage device 3 is connected with the wind driven generator 4 through the cable 6, the sea cable 7 is connected with the electrochemical energy storage device 3 to lead out the gravity type anchoring structure 2 to be connected with a power grid, the electrochemical energy storage device 3 adjusts the output power of the wind driven generator 4 in real time or periodically according to the power output characteristics of the wind driven generator, the stability is good, the adaptability is good, and the impact of the existing offshore wind power fluctuation to the power grid is effectively reduced.
When the wind power plant integrated control system is used, electric energy generated by the wind driven generator 4 is transmitted to the electrochemical energy storage device 3 through the cable 6, the electrochemical energy storage device 3 starts a charging, discharging and non-charging and non-discharging strategy according to the output power of the wind driven generator 4, the electric energy is transmitted to a power grid through the submarine cable 8, and the running state data of the wind driven generator 4 and the running state data of the electrochemical energy storage device 3 are transmitted to the offshore wind power plant integrated control center through the submarine cable 8.
When the wind power generation device is used, when the power generation amount of the wind power generator 4 is higher than the requirement of the power grid side, the output power of the wind power generator 4 is larger, part of electric energy is stored by the electrochemical energy storage device 3, and when the power generation amount of the wind power generator 4 is lower than the requirement of the power grid side, the output power of the wind power generator 4 is smaller, and part of electric energy is released by the electrochemical energy storage device 3.
When the floating type wind power generation device is used, the floating type supporting platform 1 supports the wind driven generator 4, and the floating barrel 11 connected with the base floats in seawater to bear the weight of upper equipment, self weight and external storm flow load, so that the stability of the floating type wind power generation device is ensured.
When the floating type supporting platform is used, when the ocean sea conditions change, the tension degree between the mooring cable 5 and the gravity type anchoring structure 2 can be adjusted through the tension adjusting mechanism, the stability of the floating type supporting platform 1 is improved, and the floating type supporting platform is suitable for the ocean environments under different sea conditions.
When the device is used, the electrochemical energy storage device 3 is positioned in the energy storage space of the gravity type anchoring structure 2, the structural characteristics of the gravity type anchoring structure 2 are fully utilized, the space is saved, the corrosion of the marine environment is avoided, and the service life is prolonged.
When the electrochemical energy storage device is used, the seawater cooling system 8 arranged around the energy storage space is used for absorbing part of heat emitted by the electrochemical energy storage device 3 during operation and transferring the heat to seawater, so that the electrochemical energy storage device 3 works at a set environmental temperature, and the stability of the electrochemical energy storage device during operation is improved.
When the wind driven generator is used, the electric energy control system 32 controls the charging and discharging of the core energy storage element 31, the output power of the wind driven generator 4 is predicted in time, and the battery management system 33 is used for managing the core energy storage element 31.
When in use, the core energy storage element 31 is one or a combination of a ternary lithium battery, a lithium iron phosphate battery and a solid-state lithium battery.
In use, the core energy storage element 31 further comprises a lead-acid (carbon) battery, a zinc-silver battery, a seawater battery, and a combination of the lead-acid (carbon) battery, the zinc-silver battery, the seawater battery and a lithium battery.
When the wind driven generator is used, one or more wind driven generators 4 are installed on a single floating support platform 1 according to different sea conditions, and the utilization rate of wind energy is improved.
The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and features in the embodiments and examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention is defined by the claims, and includes equivalents of technical features of the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention.
Claims (5)
1. An offshore wind power floating foundation integrated with an electrochemical energy storage device is characterized in that: the device comprises a floating supporting platform (1), a gravity type anchoring structure (2) and an electrochemical energy storage device (3); the electrochemical energy storage device (3) is positioned in the gravity type anchoring structure (2); the gravity type anchoring structure (2) is positioned at the lower part of the floating supporting platform (1) and is connected with the floating supporting platform;
the electrochemical energy storage device (3) comprises a core energy storage element (31), an electric energy control system (32) and a battery management system (33), wherein the electric energy control system (32) and the battery management system (33) are connected with the core energy storage element (31);
the core energy storage element (31) is one or a combination of a ternary lithium battery, a lithium iron phosphate battery and a solid-state lithium battery.
2. The offshore wind power floating foundation of integrated electrochemical energy storage device of claim 1, wherein: the floating support platform (1) comprises a buoy (11), a support rod (12), a tensioning adjusting mechanism (13) and a support structure (14) which are connected through a base, the wind driven generator (4) is connected with the support structure (14), and the gravity type anchoring structure (2) is connected with the floating support platform (1) through the tensioning adjusting mechanism (13) and a mooring cable (5).
3. The offshore wind power floating foundation of integrated electrochemical energy storage device of claim 2, wherein: the gravity type anchoring structure (2) is made of concrete, reinforced concrete and rock-fill concrete, the interior of the gravity type anchoring structure is of a hollow structure, and a seawater cooling system (8) is arranged around the energy storage space of the gravity type anchoring structure (2).
4. The offshore wind power floating foundation of integrated electrochemical energy storage device of claim 1, wherein: the electrochemical energy storage device (3) is connected with the wind driven generator (4) through a cable (6), and the submarine cable (7) is connected with the electrochemical energy storage device (3) and led out of the gravity type anchoring structure (2).
5. The offshore wind power floating foundation of integrated electrochemical energy storage device of claim 1, wherein: and the electrochemical energy storage device (3) adjusts energy storage and release strategies according to the real-time output power of the wind driven generator and the power predicted value in a short time.
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| CN202011585600.0A CN112606962A (en) | 2020-12-29 | 2020-12-29 | Offshore wind power floating foundation integrated with electrochemical energy storage device |
| PCT/CN2021/105230 WO2022142253A1 (en) | 2020-12-29 | 2021-07-08 | Offshore wind power floating foundation integrated with electrochemical energy storage device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114552614A (en) * | 2022-01-17 | 2022-05-27 | 东北电力大学 | Offshore wind power conveying method using energy storage battery |
| WO2022142253A1 (en) * | 2020-12-29 | 2022-07-07 | 中国长江三峡集团有限公司 | Offshore wind power floating foundation integrated with electrochemical energy storage device |
| CN116443196A (en) * | 2023-05-16 | 2023-07-18 | 广东海洋大学 | Offshore wind power device with floating foundation |
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2020
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022142253A1 (en) * | 2020-12-29 | 2022-07-07 | 中国长江三峡集团有限公司 | Offshore wind power floating foundation integrated with electrochemical energy storage device |
| CN114552614A (en) * | 2022-01-17 | 2022-05-27 | 东北电力大学 | Offshore wind power conveying method using energy storage battery |
| CN116443196A (en) * | 2023-05-16 | 2023-07-18 | 广东海洋大学 | Offshore wind power device with floating foundation |
| CN116443196B (en) * | 2023-05-16 | 2024-02-20 | 广东海洋大学 | Offshore wind power device with floating foundation |
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