In-situ compressed air energy storage system fused with offshore wind power

Abstract

The invention discloses an in-situ compressed air energy storage system fused with offshore wind power in the technical field of offshore wind power generation and energy storage, which comprises a jacket foundation, a wind driven generator transition section is arranged at the center of the top of the jacket foundation, and an underwater steel platform is arranged at the lower end of the outer side of the jacket foundation. A flexible gas storage container is installed in the middle of the underwater steel platform, a jacket overhanging type platform is arranged at the upper end of the outer side of the jacket foundation, an energy storage module is arranged at the left end of the top of the jacket overhanging type platform, and an energy release module is arranged at the right end of the top of the jacket overhanging type platform. The energy storage module and the energy release module are symmetrically arranged at the left end and the right end of the top of the jacket overhanging type platform, so that the energy storage module and the energy release module can achieve relatively independent functions, the function of compressed air energy storage can be achieved after the energy storage module and the energy release module are combined, and eccentricity of the platform is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power generation and energy storage, and in particular to an in-situ compressed air energy storage system integrated with offshore wind power. Background Art

[0002] Energy is the foundation of human social development. The update of energy technology and the change of energy types determine the nature and mode of human social development. At present, energy development is in a critical period of profound changes and major adjustments. Facing the dual challenges of global climate change and ecological environment deterioration, vigorously developing clean and renewable energy has become an inevitable trend in energy development. As a clean and renewable energy, wind power generation has significant social and environmental benefits and is of great significance to promoting the development of renewable energy in my country.

[0003] In recent years, offshore wind power has developed rapidly and has become a key research direction in many countries. According to the EU's energy development plan, it has established offshore wind farms in the UK, Germany, the Netherlands and other countries, and has achieved remarkable results. In addition, the development of offshore wind power in China is also growing. China has a huge potential market and advantageous marine resources, and has successively established a number of offshore wind farms in Fujian, Guangdong, Jiangsu and other places.

[0004] At present, offshore wind power projects are often composed of three parts: "offshore wind turbines - offshore booster stations - onshore energy storage systems", in which electricity is transmitted through high-voltage submarine cables. Due to the uncertainty of offshore wind resources, the frequency of power generation fluctuates greatly and the distribution of electricity is relatively discrete, which puts higher requirements on the load capacity of submarine cables and the regulation capacity of onshore energy storage systems.

[0005] The energy storage system is conducive to peak shaving and valley filling, improving power supply reliability, improving system efficiency, enhancing the impact resistance of the power grid, increasing the adjustment range, and better achieving supply and demand balance. The in-situ compressed air energy storage system can integrate the energy storage system with offshore wind turbines to achieve in-situ energy storage, avoid the occupation of additional energy storage land, and perform peak shaving from the power source to reduce the load on the submarine cable.

[0006] The existing technology combines the compressed air energy storage system with the offshore wind turbine, and installs the compressed air energy storage system on the offshore wind turbine. After this improvement, the size of the upper part of the foundation becomes larger, the load becomes larger, and the gravity load is eccentric. Summary of the invention

[0007] In order to improve the above-mentioned prior art of combining a compressed air energy storage system with an offshore wind turbine, the compressed air energy storage system is installed on the offshore wind turbine. After such improvement, the size of the upper part of the foundation becomes larger, the load becomes larger, and the gravity load is eccentric. The present invention provides an in-situ compressed air energy storage system integrated with offshore wind power.

[0008] The present invention provides an in-situ compressed air energy storage system integrated with offshore wind power, which adopts the following technical solutions:

[0009] An in-situ compressed air energy storage system integrated with offshore wind power comprises a conductor frame foundation, a wind turbine transition section is arranged at the center of the top of the conductor frame foundation, an underwater steel platform is arranged at the lower end of the outer side of the conductor frame foundation, a flexible gas storage container is installed in the middle of the underwater steel platform, a conductor frame cantilever platform is arranged at the upper end of the outer side of the conductor frame foundation, an energy storage module is arranged at the left end of the top of the conductor frame cantilever platform, and an energy release module is arranged at the right end of the top of the conductor frame cantilever platform.

[0010] By adopting the above technical solution, the energy storage module and the energy release module are symmetrically arranged at the left and right ends of the top of the cantilevered platform of the conductor frame, so that the energy storage module and the energy release module can realize relatively independent functions. After the energy storage module and the energy release module are combined, they can also realize the function of compressed air energy storage, thereby solving the problems of large plane size, large load and large eccentricity of gravity load of the upper module.

[0011] Optionally, the energy storage module is provided with two layers, wherein one layer of the energy storage module is provided with cables and conveying pipelines, and the other layer of the energy storage module is provided with heat accumulators and air compressors at the upper and lower ends thereof respectively;

[0012] The energy release module is provided with two layers, wherein one layer of the energy release module is provided with cables and conveying pipelines, and the other layer of the energy release module is provided with a heat exchanger, an expander and a generator body from top to bottom.

[0013] By adopting the above technical solution, the energy storage module and the energy release module can realize relatively independent functions, and the energy storage module and the energy release module can also realize the function of compressed air energy storage after being combined.

[0014] Optionally, the energy storage module and the energy release module are similar in size and weight.

[0015] By adopting the above technical solution, the eccentricity of the platform is reduced.

[0016] Optionally, a connecting module is arranged between the energy storage module and the energy release module, and the connecting module has two layers, and the layer height of the two layers of the connecting modules is the same as the layer height of the two layers of the energy storage module and the energy release module. The connecting module is respectively communicated with the energy storage module and the energy release module, and a pedestrian passage, a cable passage and a conveying pipeline are respectively arranged inside the connecting module.

[0017] By adopting the above technical solution, the connection between the energy storage module and the energy release module is facilitated.

[0018] Optionally, a connection node is provided between the top of the catheter rack foundation and the upper module column, and a reverse plug tip is provided on the top of the connection node, and the reverse plug tip is directed upward.

[0019] By adopting the above technical solution, when the upper module column is installed, the upper module column is guided into the reverse plug tip, thereby facilitating accurate alignment and positioning.

[0020] Optionally, a horizontal ring plate is provided at the bottom of the reverse plug tip, and the horizontal ring plate is welded to the upper module column, and the welding direction is forward welding.

[0021] By adopting the above technical solution, welding construction is facilitated and welding quality is guaranteed.

[0022] Optionally, the conductor frame cantilever platform adopts a triangular truss structure, the vertical rods on the conductor frame cantilever platform are main rods on the conductor frame foundation, the horizontal rods on the conductor frame cantilever platform are H-shaped steels, the diagonal rods on the conductor frame cantilever platform are steel pipes, and connection nodes are arranged at the intersections of the diagonal rods and the horizontal rods on the conductor frame cantilever platform.

[0023] By adopting the above technical solution, the structure of the jacket foundation is reasonable and the force is clear.

[0024] In summary, the present invention includes at least one of the following beneficial effects:

[0025] By symmetrically arranging energy storage modules and energy release modules at the left and right ends of the top of the conductor frame cantilevered platform, the energy storage modules and the energy release modules can realize relatively independent functions. When the energy storage modules and the energy release modules are combined, the function of compressed air energy storage can be realized, reducing the eccentricity of the platform.

[0026] By setting up an underwater steel platform, the underwater space can be reasonably utilized, while the overall stability of the jacket foundation is enhanced, and the lateral force resistance of the wind turbine foundation is effectively improved.

[0027] By setting a connecting module between the energy storage module and the energy release module, the connecting module serves as a cable and a transmission pipeline between the energy storage module and the energy release module, and also as a traffic channel between the energy storage module and the energy release module, thereby facilitating the connection between the energy storage module and the energy release module.

[0028] By setting up a cantilevered platform for the conductor frame, the structure of the conductor frame foundation is reasonable and the force is clear. At the same time, the energy storage system serves as a counterweight for the wind turbine, which is beneficial to its shock absorption. The foundation of the energy storage system and the foundation of the wind turbine are effectively unified into one foundation, saving construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is a schematic diagram of the planar structure of the energy storage module and the energy release module of the present invention;

[0031] Figure 2 It is a schematic diagram of the cross-sectional structure of the energy storage module and the energy release module of the present invention;

[0032] Figure 3 It is a schematic diagram of the overall structure of the present invention;

[0033] Figure 4 It is a schematic diagram of the connection structure between the upper module column and the conductor frame foundation of the present invention.

[0034] In the figure: 1. Energy storage module; 2. Energy release module; 3. Connection module; 4. Heat accumulator; 5. Air compressor; 6. Heat exchanger; 7. Expander; 8. Generator body; 9. Wind turbine transition section; 10. Overhanging platform of the conductor frame; 11. Conductor frame foundation; 12. Flexible gas storage container; 13. Underwater steel platform; 14. Reverse plug tip; 15. Horizontal ring plate. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-4 The present invention is described in further detail.

[0036] Please refer to the attached figure in the instruction manual Figure 3 and Figure 4 , an embodiment provided by the present invention: an in-situ compressed air energy storage system integrated with offshore wind power, comprising a conductor frame foundation 11, a wind turbine transition section 9 is arranged at the center of the top of the conductor frame foundation 11, a connection node is arranged between the top of the conductor frame foundation 11 and the upper module column, a reverse plug tip 14 is arranged at the top of the connection node, and the reverse plug tip 14 is directed upward. When the upper module column is installed, the upper module column is guided into the reverse plug tip 14, so as to facilitate accurate alignment and positioning. A horizontal ring plate 15 is arranged at the bottom of the reverse plug tip 14, and the horizontal ring plate 15 is welded to the upper module column, and the welding direction is forward welding. It is convenient for welding construction and ensures welding quality.

[0037] Please refer to the attached figure in the instruction manual Figure 3The lower end of the outer side of the jacket foundation 11 is provided with an underwater steel platform 13, and a flexible gas storage container 12 is installed in the middle of the underwater steel platform 13. The upper end of the outer side of the jacket foundation 11 is provided with a jacket cantilever platform 10, and the jacket cantilever platform 10 adopts a triangular truss structure. The vertical rod on the jacket cantilever platform 10 is the main rod on the jacket foundation 11, the horizontal rod on the jacket cantilever platform 10 is an H-shaped steel, and the oblique rod on the jacket cantilever platform 10 is a steel pipe. A connection node is provided at the intersection of the oblique rod and the horizontal rod on the jacket cantilever platform 10. The structure of the jacket foundation 11 is reasonable and the force is clear.

[0038] Please refer to the attached figure in the instruction manual Figure 1 , Figure 2 and Figure 3 An energy storage module 1 is arranged at the left end of the top of the catheter rack cantilevered platform 10, and an energy release module 2 is arranged at the right end of the top of the catheter rack cantilevered platform 10. The energy storage module 1 is arranged with two layers, one of which is provided with cables and conveying pipelines, and the other is provided with a heat accumulator 4 and an air compressor 5 at the upper and lower ends of the other energy storage module 1.

[0039] Please refer to the attached figure in the instruction manual Figure 1 and Figure 2 The energy release module 2 is provided with two layers, one of which is provided with cables and transmission pipelines, and the other is provided with heat exchangers 6, expanders 7 and generator bodies 8 from top to bottom. The energy storage module 1 and the energy release module 2 can realize relatively independent functions, and the energy storage module 1 and the energy release module 2 can also realize the function of compressed air energy storage after being combined. The size and weight of the energy storage module 1 and the energy release module 2 are similar. The platform eccentricity is reduced.

[0040] Please refer to the attached figure in the instruction manual Figure 1 and Figure 2 A connection module 3 is provided between the energy storage module 1 and the energy release module 2. The connection module 3 has two layers. The height of the two layers of the connection module 3 is the same as the height of the two layers of the energy storage module 1 and the energy release module 2. The connection module 3 is connected to the energy storage module 1 and the energy release module 2 respectively. A pedestrian passage, a cable passage and a conveying pipeline are provided inside the connection module 3 respectively. It is convenient to connect the energy storage module 1 and the energy release module 2.

[0041] Working principle: During the energy storage stage, the air compressor 5 in the energy storage module 1 fills air into the flexible gas storage container 12, and the flexible gas storage container 12 is fixed on the underwater steel platform 13. The air is transported to the interior of the flexible gas storage container 12 through a delivery pipeline. After reaching the storage pressure, the hydrostatic pressure of the water keeps the flexible gas storage container 12 at a constant pressure. The heat generated during the energy storage stage is recovered and stored in the heat accumulator 4 to minimize heat loss.

[0042] During the energy release stage, the compressed air from the flexible gas storage container 12 returns to the energy storage system through the energy release pipeline. Before entering the expander 7 in the energy release module 2, this part of cold air is heated by the heat exchanger 6 using the stored compression heat, and finally passes through the generator body 8 to generate electricity. The energy storage module 1 and the energy release module 2 adopt a symmetrical layout technology. At the same time, the size and weight of the energy storage module 1 and the energy release module 2 are similar, which solves the problems of large plane size, large load and large eccentricity of gravity load of the upper module.

[0043] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An in-situ compressed air energy storage system integrated with offshore wind power, comprising a pipe frame foundation (11), characterized in that: A wind turbine transition section (9) is arranged at the center of the top of the jacket foundation (11); an underwater steel platform (13) is arranged at the lower end of the outer side of the jacket foundation (11); a flexible gas storage container (12) is installed in the middle of the underwater steel platform (13); a jacket cantilever platform (10) is arranged at the upper end of the outer side of the jacket foundation (11); an energy storage module (1) is arranged at the left end of the top of the jacket cantilever platform (10); and an energy release module (2) is arranged at the right end of the top of the jacket cantilever platform (10).

2. The in-situ compressed air energy storage system integrated with offshore wind power according to claim 1 is characterized in that: The energy storage module (1) is provided with two layers, wherein one layer of the energy storage module (1) is provided with cables and a transmission pipeline, and the other layer of the energy storage module (1) is provided with a heat accumulator (4) and an air compressor (5) at the upper and lower ends thereof respectively; The energy release module (2) is provided with two layers, wherein one layer of the energy release module (2) is provided with cables and a transmission pipeline, and the other layer of the energy release module (2) is provided with a heat exchanger (6), an expander (7) and a generator body (8) from top to bottom.

3. The in-situ compressed air energy storage system integrated with offshore wind power according to claim 1 is characterized in that: The energy storage module (1) and the energy release module (2) are similar in size and weight.

4. The in-situ compressed air energy storage system integrated with offshore wind power according to claim 1 is characterized in that: A connection module (3) is arranged between the energy storage module (1) and the energy release module (2); the connection module (3) has two layers; the layer height of the two layers of the connection module (3) is the same as the layer height of the two layers of the energy storage module (1) and the energy release module (2); the connection module (3) is respectively connected to the energy storage module (1) and the energy release module (2); and a pedestrian passage, a cable passage and a conveying pipeline are respectively arranged inside the connection module (3).

5. The in-situ compressed air energy storage system integrated with offshore wind power according to claim 1 is characterized in that: A connection node is arranged between the top of the catheter frame foundation (11) and the upper module column, and a reverse plug tip (14) is arranged on the top of the connection node, and the reverse plug tip (14) is directed upward.

6. The in-situ compressed air energy storage system integrated with offshore wind power according to claim 1, characterized in that: A horizontal ring plate (15) is provided at the bottom of the reverse plug tip (14), and the horizontal ring plate (15) is welded to the upper module column, and the welding direction is forward welding.

7. The in-situ compressed air energy storage system integrated with offshore wind power according to claim 1 is characterized in that: The cantilevered platform (10) of the conductor frame adopts a triangular truss structure, the vertical rods on the cantilevered platform (10) of the conductor frame are main rods on the conductor frame foundation (11), the horizontal rods on the cantilevered platform (10) of the conductor frame are H-shaped steels, the diagonal rods on the cantilevered platform (10) of the conductor frame are steel pipes, and a connection node is arranged at the intersection of the diagonal rods and the horizontal rods on the cantilevered platform (10).

Images