A single pile foundation for improving the power quality of wind farms

Abstract

The present invention relates to the technical field of offshore wind power generation, and discloses a single pile foundation for improving the quality of electric energy in a wind farm. The steel pipe pile provided by the present invention has a containing chamber opened inside and a hydraulic generator placed therein. When seawater enters the containing chamber and flows downward under the action of gravity, the hydraulic generator is driven to operate to generate electricity, thereby realizing the conversion of the potential energy of the seawater into electric energy. When the wind power generation power of the wind farm is low or the power generation power is unstable, water can be released to generate electricity, thereby improving the quality of the electric energy supplied by the wind farm to the power grid.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power generation, and in particular to a single pile foundation for improving the power quality of a wind farm. Background Art

[0002] As a clean and renewable energy form, wind energy has received extensive attention and application in recent years, and offshore wind farms have shown great potential and advantages. However, wind farms also face many challenges during operation, one of which is the problem of power quality.

[0003] Since wind speed and direction change frequently, mainly affected by factors such as weather, offshore wind power generation has short-term volatility, which is random and intermittent. The wind force at different times in a long period of time will also show a certain daily periodicity or seasonal periodicity, which leads to the volatility of wind power generation not only related to the wind conditions of the site, but also affected by time factors. When the wind is small, the wind turbine will not start and cannot generate electricity; when the wind is too strong, the wind turbine will shut down and cannot generate electricity; when the wind is unstable, the output power of the wind turbine will be large and small; these are not conducive to the power grid receiving the electricity from the wind farm, that is, the quality of the electricity from the wind farm is slightly low. The integration of slightly lower-quality wind power generation into the traditional power grid will impact the power grid, causing problems such as grid frequency deviation and voltage fluctuation. An effective internal regulation system of the wind farm is needed to improve the quality of electricity. Summary of the invention

[0004] In view of this, the present invention provides a single pile foundation for improving the power quality of a wind farm, so as to solve the problem of slightly low power quality due to site wind conditions and time factors during the operation of an offshore wind farm.

[0005] The single pile foundation for improving the electric energy quality of a wind farm provided by the present invention comprises a steel pipe pile, a power transmission and transformation equipment, a switch and a hydro-turbine generator. Specifically, the steel pipe pile is provided with a first body located above the seabed surface, a second body located below the seabed surface, and a accommodating chamber extending from the first body to the second body, wherein the first body is provided with at least one water intake end; the power transmission and transformation equipment is installed in the accommodating chamber, and the power transmission and transformation equipment is located inside the first body; the switch is provided with at least two groups, and at least two groups of the switch are respectively arranged at the water intake end and the drainage end, for connecting or separating the accommodating chamber with the ocean or atmosphere outside the steel pipe pile; the hydro-turbine generator is arranged inside the accommodating chamber, and the hydro-turbine generator is located below the water intake end, and the hydro-turbine generator is electrically connected to the power transmission and transformation equipment through a cable.

[0006] Beneficial effects: The single pile foundation for improving the power quality of the wind farm provided by the present invention is convenient for installing the offshore wind power tower and the unit above the sea surface by placing the first body of the steel pipe pile above the sea surface, and convenient for controlling the entry of seawater or preventing the entry of seawater into the accommodating chamber by providing at least one water intake end on the side of the first body close to the seabed surface in the height direction, and installing a switch at the water intake end, and convenient for controlling the entry of seawater or preventing the entry of seawater into the accommodating chamber, and by arranging the hydro-turbine generator inside the accommodating chamber, and making the hydro-turbine generator below the water intake end. Normally, the switch at the water intake end is opened, and seawater enters the upper space of the accommodating chamber. When power generation is required, the water diversion switch is opened, and seawater flows to the lower space of the accommodating chamber, driving the hydro-turbine generator to operate under the action of gravity, and the hydro-turbine generator generates electricity under the action of seawater. Since the hydro-turbine generator is electrically connected to the power transmission and transformation equipment through a cable at this time, the electric energy generated by the hydro-turbine generator can be provided to the power grid together with the electric energy generated by the wind turbine generator, effectively solving the problem of slightly low power quality of the wind farm due to low wind force or unstable wind force.

[0007] In an optional embodiment, the monopile foundation for improving the power quality of the wind farm also includes a water-proof working platform, an upper cavern, a lower cavern, a water diversion pipe and a water diversion switch. Specifically, the water-proof working platform is arranged inside the accommodating chamber, separating the accommodating space up and down, and is used as a working platform and a construction and operation and maintenance platform for some equipment and facilities; the upper cavern is installed on the second body, the temporary water storage chamber of the upper cavern is connected to the accommodating chamber, and is arranged at an elevation above the water-proof working platform; the lower cavern is installed on the second body, the temporary water storage chamber of the lower cavern is connected to the accommodating chamber, and the lower cavern is located on the side of the water-proof working platform away from the upper cavern in the height direction; the water diversion pipe runs through the water-proof working platform and extends in the height direction toward the bottom of the steel pipe pile; the water diversion switch is installed on the water diversion pipe and is used to control the seawater in the accommodating chamber to stay on the upper cavern side or flow to the lower cavern side; wherein the turbine generator is located inside the water diversion pipe.

[0008] Beneficial effects: By adding an upper cavern and a lower cavern, and using a waterproof working platform, the area in the accommodating chamber that is used to connect to the upper cavern is separated from the area that is used to connect to the lower cavern. Normally, the switch at the water intake end is opened, and seawater enters the upper space of the accommodating chamber and the upper cavern. When power generation is required, the water diversion switch is turned on, and seawater flows through the water diversion pipe fittings, enters the lower space of the accommodating chamber and the lower cavern, and the seawater drives the turbine generator placed inside the water diversion pipe fittings to operate and generate electricity. In addition, due to the provision of the upper cavern, a large amount of seawater is stored before power generation, so that the seawater used in the power generation process will act on the turbine generator more stably for a long period of time to generate electricity, providing the necessary electricity supplement for wind power generation in the wind farm, and providing it to the power grid together, effectively solving the problem of slightly low power quality in the wind farm due to low wind force or unstable wind force.

[0009] In an optional embodiment, the single pile foundation for improving the power quality of a wind farm further includes a water pump, which is installed inside the accommodating chamber, a water intake end of the water pump is installed with a water pumping pipe, the water pumping pipe extends to the bottom of the second body, and a water discharge end of the water pump is installed with a water delivery pipe for conveying the pumped seawater to the discharge end.

[0010] Beneficial effects: By setting up a water pump, water pumping pipes and water delivery pipes, it is convenient to pump the water temporarily stored in the lower cavern to the drainage end and discharge it to the ocean. The seawater in the lower space of the accommodating chamber and the lower cavern can be emptied in advance, preparing for the next improvement of the power quality of the wind farm.

[0011] In an optional embodiment, the top of the steel pipe pile is in an open state, serving as an exhaust port for the first body and the second body; the single pile foundation for improving the power quality of the wind farm also includes an exhaust pipe fitting, which is arranged inside the accommodating chamber; wherein the water pump is located inside the exhaust pipe fitting; the upper end of the exhaust pipe fitting along the axial direction is connected to the environment where the exhaust port is located, and the lower end of the exhaust pipe fitting along the axial direction extends to the bottom of the water-proof working platform.

[0012] Beneficial effect: The top of the steel pipe pile is in an open state, serving as the exhaust port of the first body and the second body, and an exhaust pipe fitting is provided. Since the exhaust pipe fitting is installed inside the accommodating chamber, it is convenient to discharge the air inside the accommodating chamber in time during the process of seawater flowing into the lower space of the accommodating chamber, thereby ensuring that seawater flows smoothly into the lower space of the accommodating chamber and avoiding excessive air pressure in the lower space of the accommodating chamber, which may affect power generation, damage equipment or structure, or even cause safety accidents.

[0013] In an optional embodiment, the accommodating chamber extends through the end of the second body away from the first body; the single pile foundation for improving the power quality of the wind farm also includes a sealing member, which is arranged at the bottom of the steel pipe pile to form a watertight environment in the lower part of the pile body to prevent water in the seabed from seeping into the lower space inside the pile body and affecting operation and maintenance.

[0014] In an optional embodiment, the single pile foundation for improving the power quality of the wind farm also includes a construction and operation maintenance channel, which is installed inside the accommodating chamber and reaches the waterproof working platform, the construction and operation maintenance platform and the sealing member in sections through the construction and operation maintenance channel.

[0015] Beneficial effect: By providing a construction and maintenance passage in sections inside the accommodation chamber that leads to the waterproof working platform, the construction and maintenance platform and the sealing parts, it is convenient for operators to move within the accommodation chamber to the area requiring construction and maintenance.

[0016] In an optional embodiment, the single pile foundation for improving the power quality of the wind farm also includes a construction and operation and maintenance platform, which is arranged inside the accommodating chamber and at the elevation of the bottom of the upper cavern and the lower cavern.

[0017] In an optional embodiment, the lower caverns are provided in one or more groups. When multiple groups are provided, two adjacent groups of the lower caverns are spaced apart along the height direction.

[0018] Beneficial effect: By providing one or more sets of lower caverns, the power generation time and amount of the turbine can be increased, and the overall power quality of the wind farm can be improved.

[0019] In an optional implementation, the monopile foundation for improving the electric energy quality of a wind farm further includes an equipment platform, and the equipment platform is disposed inside the accommodating chamber, and the equipment platform is located inside the first body.

[0020] Beneficial effect: By arranging the equipment platform inside the first body, the equipment installed on the equipment platform is separated from the open-air environment of the sea area, thereby protecting the equipment.

[0021] In an optional implementation, the monopile foundation for improving the power quality of a wind farm further includes an offshore wind power tower and a generator set, and the offshore wind power tower and the generator set are installed at an end of the first body away from the second body.

[0022] Beneficial effect: By installing the offshore wind power tower and the unit at the end of the first body away from the second body, wind power generation is facilitated. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the specific implementation modes of the present invention, the drawings required for use in the description of the specific implementation modes will be briefly introduced below. Obviously, the drawings described below are some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of a main view of a single pile foundation for improving the power quality of a wind farm provided by the present invention;

[0025] Figure 2 A schematic top view of a case where two lower caverns are provided in each group of the single pile foundation for improving the power quality of a wind farm provided by the present invention;

[0026] Figure 3 A schematic top view of a case where three lower caverns are provided in each group of the single pile foundation for improving the power quality of a wind farm provided by the present invention;

[0027] Figure 4 A schematic top view of a case where four lower caverns are provided in each group of the single pile foundation for improving the power quality of a wind farm provided by the present invention;

[0028] Figure 5 A schematic top view of a ring-shaped tunnel formed by each group of lower caverns in a single pile foundation for improving the power quality of a wind farm provided by the present invention.

[0029] 1. Steel pipe pile; 11. First body; 12. Second body; 121. Water intake end; 122. Drainage end;

[0030] 21. Power transmission and transformation equipment; 22. Hydro-generator; 23. Water pump; 24. Pumping pipes; 25. Water delivery pipes; 26. Cables; 27. Water inlet pipes;

[0031] 31. Upper cave storehouse; 32. Lower cave storehouse;

[0032] 41. Waterproof working platform; 42. Construction and operation and maintenance passage; 43. Construction and operation and maintenance platform; 44. Equipment platform;

[0033] 51. Water diversion pipe fittings; 52. Water diversion switch;

[0034] 6. Exhaust pipe fittings;

[0035] 7. Blocking parts;

[0036] 8. Offshore wind power towers and units;

[0037] 91. Sea surface; 92. Seabed. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0039] In the description of the present application, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0040] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0041] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0043] Offshore wind power generation is the focus of the development of the new energy field, and the market prospects are very broad. Since wind speed and wind direction change frequently, mainly affected by factors such as weather, offshore wind power generation is volatile, and this volatility is random and intermittent in short periods of time. The wind force at different times in a long period of time will also show a certain daily periodicity or seasonal periodicity, which leads to the volatility of wind power generation not only related to the wind conditions of the site, but also affected by time factors. When the wind is small, the wind turbine will not start and cannot generate electricity; when the wind is too strong, the wind turbine will shut down and cannot generate electricity; when the wind is unstable, the output power of the wind turbine will be large and small; these are not conducive to the power grid receiving the electricity from the wind farm, that is, the power quality of the wind farm is slightly low. The integration of slightly lower-quality wind power generation into the traditional power grid will impact the power grid, causing problems such as grid frequency deviation and voltage fluctuation. An effective internal regulation system of the wind farm is needed to improve the power quality.

[0044] In offshore wind power projects, large-diameter steel pipe piles are widely used because of their advantages of small footprint, simple structure, fast construction, and low cost. As the size of offshore wind power large-diameter steel pipe piles becomes larger, that is, the diameter and depth of offshore wind power large-diameter steel pipe piles are larger, and the bottom of the pile generally enters a better soil layer, the internal volume of the pile body is large enough to set up turbine generators, water pumps and other equipment, and can also be fully utilized as part of a small "upper reservoir" or "lower reservoir"; offshore wind power large-diameter steel pipe piles can be used as construction channels to build underground caverns with larger cross-sections and larger volumes, including upper caverns and lower caverns.

[0045] On this basis, after a single offshore wind power large-diameter steel pipe pile is sunk, the soil inside the steel pipe pile is removed and plugging parts are installed; the offshore wind power large-diameter steel pipe pile is used as a construction channel, a construction and operation and maintenance platform is installed, and an underground cavern is built, including an upper cavern and a lower cavern; the ocean is mainly used, and part of the internal space of the offshore wind power large-diameter steel pipe and the newly built upper cavern 3 are combined to form an "upper reservoir"; part of the internal space of the offshore wind power large-diameter steel pipe pile and the newly built lower cavern are used as the "lower reservoir"; the greater depth of the offshore wind power large-diameter steel pipe pile into the ground is used to form a certain head difference; equipment or facilities such as turbine generators, control equipment, pipelines, cables, water pumps, construction and operation and maintenance channels are installed to build an energy storage and regulation system.

[0046] That is, seawater is used as the working medium, and through the mutual conversion of potential energy and electric energy, the storage and regulation of electric energy inside the wind farm is realized, so that the power supply to the power grid can have better power quality. The electric energy that was previously required to abandon wind is used to lift seawater to the "upper reservoir". When the environmental wind force is small or unstable, water is released to the "lower reservoir" to generate electricity, providing the necessary electric energy supplement for the wind power generation of the wind farm, and providing it to the power grid together, effectively solving the problem of slightly low power quality of the wind farm caused by small or unstable wind force.

[0047] Under this condition, when faced with the situation of wind abandonment in the past, the electricity generated by the wind turbine is used to lift part of the internal space of the large-diameter steel pipe piles of the offshore wind power and the seawater in the newly built lower cavern through a water pump and discharge it to the ocean through the drainage end; in the preparation stage for power generation, the water intake end is opened to allow seawater to enter part of the internal space of the large-diameter steel pipe piles of the offshore wind power and the newly built upper cavern; when power generation is needed, the switch parts of the water intake end and the water diversion pipe fittings are opened, and seawater enters the water diversion pipe fittings to drive the turbine generator to generate electricity, thereby providing necessary power regulation for wind power generation in the wind farm, improving the quality of electricity, and providing it to the power grid together.

[0048] Combine the following Figure 1 , describing an embodiment of the present invention.

[0049] The present invention provides a single pile foundation for improving the quality of electric energy in a wind farm, comprising a steel pipe pile 1, a power transmission and transformation equipment 21, a switch and a hydro-turbine generator 22. Specifically, the steel pipe pile 1 is provided with a first body 11 located above the seabed surface 92, a second body 12 located below the seabed surface 92, and a receiving chamber extending from the first body 11 to the second body 12, the first body 11 is provided with at least one water intake end 121; the power transmission and transformation equipment 21 is installed in the receiving chamber, and the power transmission and transformation equipment 21 is located inside the first body 11; the switch is provided with at least two groups, and at least two groups of switch are respectively arranged at the water intake end 121 and the drainage end 122, for connecting or separating the receiving chamber with the ocean or atmosphere outside the steel pipe pile 1; the hydro-turbine generator 22 is arranged inside the receiving chamber, the hydro-turbine generator 22 is located below the water intake end 121, and the hydro-turbine generator 22 is electrically connected to the power transmission and transformation equipment 21 through a cable 26.

[0050] By utilizing the single pile foundation of this embodiment to improve the power quality of a wind farm, by positioning the upper end of the first body 11 of the steel pipe pile 1 above the sea surface 91, it is convenient to install the offshore wind power tower and the unit 8 above the sea surface 91, by providing a water intake end 121 on the side of the second body 12 close to the sea surface 91 in the height direction, and installing a switch at the water intake end 121, it is convenient to control the entry of seawater or prevent seawater from entering the accommodating chamber, and by arranging the hydro-turbine generator 22 inside the accommodating chamber, and making the hydro-turbine generator 22 below the water intake end 121.

[0051] Normally, the switch at the water intake end 121 is open, and seawater enters the upper space of the accommodation chamber. When power generation is required, the water diversion switch is opened, and seawater flows to the lower space of the accommodation chamber, and drives the hydro-generator 22 to operate under the action of gravity. At this time, the hydro-generator 22 generates electricity under the action of seawater. Since the hydro-generator 22 is electrically connected to the power transmission and transformation equipment 21 through the cable 26, the electric energy generated by the hydro-generator 22 can be provided to the power grid together with the electric energy generated by the wind turbine generator, effectively solving the problem of slightly low quality of wind farm power due to low wind force or unstable wind force.

[0052] like Figure 1 As shown, the single pile foundation for improving the power quality of a wind farm provided in the present application also includes an upper cavern 31 , a water-proof working platform 41 , a lower cavern 32 , a water diversion pipe 51 and a water diversion switch 52 .

[0053] Specifically, the water-proof working platform 41 is arranged inside the accommodating chamber, separating the upper and lower accommodating spaces, and serving as a working platform and a construction and maintenance platform for some equipment and facilities; the upper cavern 31 is installed on the second body 12, and the temporary water storage chamber of the upper cavern 31 is connected to the accommodating chamber, and is arranged above the water-proof working platform 41 at a height near the elevation; the lower cavern 32 is installed on the second body 12, and the temporary water storage chamber of the lower cavern 32 is connected to the accommodating chamber, and the lower cavern 32 is located on the side of the water-proof working platform 41 away from the upper cavern 31 along the height direction; the water diversion pipe 51 penetrates the water-proof working platform 41, and extends along the height direction toward the bottom of the steel pipe pile 1; the water diversion switch 52 is installed on the water diversion pipe 51, and is used to control the seawater to stay on the side of the upper cavern 31 or flow to the side of the lower cavern 32 inside the accommodating chamber; wherein the turbine generator 22 is located inside the water diversion pipe 51.

[0054] The single pile foundation of this embodiment is used to improve the power quality of the wind farm. By adding an upper cavern 31 and a lower cavern 32, and using a waterproof working platform 41, the area in the accommodating chamber used to connect to the upper cavern 31 is separated from the area used to connect to the lower cavern 32.

[0055] Normally, in the preparation stage before power generation, the switch at the water intake end 121 is opened to allow seawater to enter the upper space of the accommodating chamber and the upper cavern 31. When power generation is required, the water diversion switch 52 is opened to allow the seawater in the upper space and the upper cavern 31 to flow through the water diversion pipe fittings and flow to the lower space of the accommodating chamber and the lower cavern 32 under the action of gravity. During the flow of seawater inside the water diversion pipe fittings 51, the turbine generator 22 placed inside the water diversion pipe fittings can be operated to generate electricity.

[0056] In addition, due to the installation of the upper cave reservoir, more seawater can be stored before power generation, so that the seawater used in the power generation process will act on the hydro-generator 22 more stably over a longer period of time, allowing the hydro-generator 22 to generate electricity stably, providing necessary electric energy supplement for wind power generation in the wind farm, and providing it to the power grid together, effectively solving the problem of slightly low power quality in the wind farm due to low wind force or unstable wind force.

[0057] Furthermore, in the present application, a water inlet pipe 27 is provided between the upper cavern 31 and the water intake end 121 to facilitate direct drainage of seawater to the upper space of the accommodating chamber and to the upper cavern 31 .

[0058] It can be explained that, in this embodiment, the first body 11 is provided with a drainage end 122; the single pile foundation for improving the power quality of the wind farm also includes a water pump 23, the water pump 23 is installed inside the accommodating chamber, and a pumping pipe 24 is installed at the water intake end of the water pump 23, and the pumping pipe 24 extends to the bottom of the second body 12, that is, the lower space of the accommodating chamber and the lower cave 32, and a water delivery pipe 25 is installed at the drainage end of the water pump 23, which is used to transport the extracted seawater to the drainage end 122 of the first body 11; wherein the water pump 23 is electrically connected to the power transmission and transformation equipment 21 through a cable 26.

[0059] By utilizing the single pile foundation of this embodiment for improving the power quality of a wind farm, by providing a water pump 23, a water pumping pipe 24 and a water delivery pipe 25, it is convenient to pump out the water temporarily stored in the lower space of the accommodating chamber and the lower cavern 32 to the drainage end 122 and discharge it to the ocean; the seawater in the lower space of the accommodating chamber and the lower cavern 32 can be emptied in advance to prepare for the next time that the electricity generated by the turbine and the electricity generated by the wind turbine are provided to the power grid.

[0060] Preferably, in this embodiment, at least two water intake ends 121 are provided along the height direction, at least two drainage ends 122 are provided along the height direction, and at least two water intake ends 121 and at least two drainage ends 122 are spaced apart along the circumference of the steel pipe pile 1 .

[0061] Similarly, in the single pile foundation for improving the power quality of a wind farm provided in this embodiment, the top of the steel pipe pile 1 is in an open state, serving as an exhaust port of the first body 11 or the second body 12; the single pile foundation for improving the power quality of a wind farm also includes an exhaust pipe fitting 6, which is arranged inside the accommodating chamber; wherein the water pump 23 is located inside the exhaust pipe fitting 6, the upper end of the exhaust pipe fitting 6 along the axial direction thereof is connected to the environment where the exhaust port is located, and the lower end of the exhaust pipe fitting 6 along the axial direction thereof extends to below the water-proof working platform 41.

[0062] In the single pile foundation for improving the power quality of a wind farm using the present embodiment, the top of the steel pipe pile 1 is in an open state, serving as an exhaust port for the first body 11 and the second body 12, and an exhaust pipe fitting 6 is provided. Since the exhaust pipe fitting 6 is installed inside the accommodating chamber, it is convenient to discharge the air inside the accommodating chamber in time during the process of seawater flowing into the accommodating chamber, thereby ensuring that seawater flows smoothly into the lower space of the accommodating chamber and avoiding excessive air pressure in the lower space of the accommodating chamber, which may affect power generation, damage equipment or structure, or even cause safety accidents.

[0063] Furthermore, in this embodiment, one end of the exhaust pipe 6 is located in the first body 11 , and the lower end extends to below the watertight working platform 41 .

[0064] It can be explained that the accommodating chamber extends through the end of the second body away from the first body.

[0065] like Figure 1 As shown, the single pile foundation for improving the power quality of a wind farm provided in the present application also includes a construction and operation maintenance channel 42, which is installed inside the accommodating chamber, and the construction and operation maintenance channel 42 is divided into sections to reach the water-proof working platform 41, the construction and operation maintenance platform 43 and the sealing member 7.

[0066] The single pile foundation of this embodiment is used to improve the power quality of the wind farm. A construction and maintenance passage 42 is provided inside the accommodating chamber, which is segmented to reach the waterproof working platform 41, the construction and maintenance platform 43 and the sealing member 7, so that the operator can move to the area requiring construction and maintenance in the accommodating chamber.

[0067] It can be explained that, in the monopile foundation for improving the power quality of a wind farm provided in the present application, the accommodating chamber extends to the end of the second body 12 away from the first body 11, such as Figure 1 The bottom of the steel pipe pile 1 is shown; the single pile foundation for improving the power quality of the wind farm also includes a plugging member 7, which is installed at the bottom of the steel pipe pile 1 to seal the bottom of the pile to form a watertight environment in the lower part of the pile body to prevent water in the seabed from seeping into the lower space inside the pile body and affecting operation and maintenance.

[0068] It can be explained that the single pile foundation for improving the power quality of wind farms provided in the present application also includes a construction and operation and maintenance platform 43, which is arranged inside the accommodating chamber and at the elevation of the bottom of the upper cavern 31 and the lower cavern 32.

[0069] It can be explained that the single pile foundation for improving the power quality of a wind farm provided in the present application does not specifically limit the number of upper caverns 31 and lower caverns 32 .

[0070] As one of the implementation modes, the lower caverns 32 are provided with one or more groups. When provided with multiple groups, two adjacent groups of lower caverns 32 are arranged at intervals along the height direction.

[0071] By utilizing the single pile foundation for improving the power quality of a wind farm according to this embodiment and providing one or more groups of lower caverns 32 , the energy storage capacity of the wind farm can be increased.

[0072] Furthermore, in the present application, the layout of each group of upper caverns 31 and lower caverns 32 is not specifically limited.

[0073] Preferably, at least one lower hole library 32 is provided in any group of lower hole library 32. When the number of lower hole library 32 in each group is two or more, two or more lower hole library 32 can be evenly installed around the circumference of the steel pipe pile 1. At this time, the angle between two adjacent lower hole library 32 in each group of lower hole library 32 is (360 / N)°, N≥2, and N is a positive integer.

[0074] For example, Figure 2 As shown, when two lower caverns 32 are provided in each group, the angle between the two lower caverns 32 is 180°; Figure 3 As shown, when three lower caverns 32 are provided in each group, the angle between two adjacent lower caverns 32 is 120°; of course, it can also be as shown in FIG. Figure 4 As shown, when four lower caverns 32 are provided in each group, the angle between two adjacent lower caverns 32 is 90°.

[0075] In addition, the shape of each upper cave storehouse 31 and lower cave storehouse 32 is not specifically limited.

[0076] Preferably, if Figure 5 As shown, the distal end of any lower cavern 32 can be connected to the distal end of the adjacent lower cavern 32, and enclosed to form an annular tunnel. In this way, the underground space can be flexibly utilized, the space of the lower cavern 32 can be expanded, and it is helpful to increase the water storage space. At the same time, the area of ​​the lower cavern 32 with a higher pressure bearing degree can be set in an arc shape to form an annular tunnel, which is helpful to improve the stability of the overall structure and its pressure bearing capacity.

[0077] Preferably, the shape and arrangement of the upper cavern 31 refer to the lower cavern 32 .

[0078] Preferably, if Figure 1 As shown, in this embodiment, one upper cave storehouse 31 and two lower cave storehouses 32 are provided.

[0079] Furthermore, a construction and operation platform 43 is provided inside the steel pipe pile 1 at the bottom of each lower cavern 32 .

[0080] It can be explained that the single pile foundation for improving the power quality of the wind farm provided in the present application, the above-mentioned water-proof working platform 41 can also serve as a construction and operation and maintenance platform 43, which is convenient for operators to construct and operate at the upper cavern 31.

[0081] like Figure 1 As shown, the monopile foundation for improving the power quality of a wind farm provided in the present application further includes an equipment platform 44 , which is arranged inside the accommodating chamber and located inside the first body 11 , wherein the power transmission and transformation equipment 21 is installed on the equipment platform 44 .

[0082] By using the monopile foundation for improving the power quality of a wind farm in this embodiment, the equipment platform 44 is arranged inside the first body 11, so that the equipment installed on the equipment platform 44 is separated from the open-air environment of the sea area, thereby protecting the equipment.

[0083] Preferably, the power transmission and transformation equipment 21 is arranged on the equipment platform 44 , above the sea surface 91 .

[0084] like Figure 1 As shown, the monopile foundation for improving the power quality of a wind farm provided in the present application also includes an offshore wind power tower and a generator set 8 , which are installed at the end of the first body 11 away from the second body 12 .

[0085] By using the monopile foundation for improving the power quality of a wind farm according to this embodiment, the offshore wind power tower and the generator set 8 are installed at the end of the first body 11 away from the second body 12, thereby facilitating wind power generation.

[0086] It can be explained that the upper cavern 31 and the lower cavern 32 mentioned in the above embodiments are both located below the seabed surface 92 .

[0087] It can be explained that the height direction mentioned above is Figure 1 The vertical direction is shown, and "horizontal" refers to Figure 1 Horizontal direction shown.

[0088] It can be explained that, for a newly built offshore wind farm, the newly built upper cavern 31 and lower cavern 32 can also help to enhance the horizontal bearing capacity of the offshore wind power large-diameter steel pipe piles 1 .

[0089] The single pile foundation for improving the power quality of the wind farm provided in the above-mentioned embodiment, during the previous power generation process, because the seawater in the upper space of the accommodating chamber and the upper cavern 31 has flowed into the lower space of the accommodating chamber and the lower cavern 32, when it is in the time period when wind power needs to be abandoned in the past, the wind power in this period can be used to extract the seawater in the lower space of the accommodating chamber and the lower cavern 32 to the drain outlet and discharge it to the ocean, so as to empty the seawater in the lower space of the accommodating chamber and the lower cavern 32 for use in the next power generation. In the preparation stage for the next power generation, the water intake end 121 is opened to allow seawater to enter the upper space of the accommodating chamber and the upper cavern 31. When power generation is required, the switch at the water intake end 121 and the water diversion switch 52 in the water diversion pipe 51 are opened to allow seawater to continue to enter the interior of the accommodating chamber and continue to flow from the upper cavern 31 to the interior of the lower cavern 32. When the hydro-turbine generator 22 is driven, power generation is performed, and the electric energy generated by the hydro-turbine generator 22 can be provided to the power grid together with the electric energy generated by the wind turbine.

[0090] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A single pile foundation for improving the power quality of a wind farm, characterized in that: include: A steel pipe pile (1), the steel pipe pile (1) comprising a first body (11) located above a seabed surface (92), a second body (12) located below the seabed surface (92), and a receiving chamber extending from the first body (11) to the second body (12), the first body (11) being provided with a water discharge end (122) and at least one water intake end (121); A power transmission and transformation device (21), the power transmission and transformation device (21) being installed in the accommodating chamber, and the power transmission and transformation device (21) being located inside the first body (11); A switch component, wherein at least two groups of the switch components are provided, and the at least two groups of the switch components are respectively arranged at the water intake end (121) and the water discharge end (122), and are used to connect or separate the accommodating chamber with the ocean or atmosphere outside the steel pipe pile (1); A hydro-turbine generator (22), the hydro-turbine generator (22) is arranged inside the accommodating chamber, the hydro-turbine generator (22) is located below the water intake end (121), and the hydro-turbine generator (22) is electrically connected to the power transmission and transformation equipment (21) via a cable (26).

2. The monopile foundation for improving the power quality of a wind farm according to claim 1, characterized in that: Also includes: A water-proof working platform (41), the water-proof working platform (41) is arranged inside the accommodation chamber, separates the accommodation space into upper and lower parts, and is used as a working platform for some equipment and facilities and a construction and operation and maintenance platform (43); An upper cavern (31), the upper cavern (31) being installed on the second body (12), the temporary water storage chamber of the upper cavern (31) being connected to the accommodating chamber, and the upper cavern (31) being arranged at a height above the water-proof working platform (41); A lower cavern (32), the lower cavern (32) being installed on the second body (12), the temporary water storage chamber of the lower cavern (32) being communicated with the accommodating chamber, and the lower cavern (32) being located on a side of the water-proof working platform (41) away from the upper cavern (31) along the height direction; A water diversion pipe (51), the water diversion pipe (51) passes through the water-blocking working platform (41) and extends in a height direction toward the bottom of the steel pipe pile (1); A water diversion switch (52), the water diversion switch (52) being installed on the water diversion pipe (51) and used to control the seawater in the accommodating chamber to stay on the side of the upper cavern (31) or flow to the side of the lower cavern (32); Wherein, the water turbine generator (22) is located inside the water diversion pipe (51).

3. The monopile foundation for improving the power quality of a wind farm according to claim 2, characterized in that: The monopile foundation for improving the power quality of a wind farm further comprises a water pump (23), the water pump (23) being installed inside the accommodating chamber, a water pumping pipe (24) being installed at the water intake end of the water pump (23), the water pumping pipe (24) extending to the bottom of the second body (12), and a water delivery pipe (25) being installed at the water discharge end of the water pump (23) for delivering the extracted seawater to the water discharge end (122) of the first body (11); Wherein, the water pump (23) is electrically connected to the power transmission and transformation equipment (21) via a cable (26).

4. The monopile foundation for improving the power quality of a wind farm according to claim 3, characterized in that: The top end of the steel pipe pile (1) is in an open state, serving as an exhaust port for the first body (11) and the second body (12); The monopile foundation for improving the power quality of a wind farm further comprises an exhaust pipe (6), wherein the exhaust pipe (6) is arranged inside the accommodating chamber, wherein the upper end of the exhaust pipe (6) along the axial direction thereof is in communication with the environment where the exhaust port is located, and the lower end of the exhaust pipe (6) along the axial direction thereof extends to below the water-proof working platform (41); Wherein, the water pump (23) is located inside the exhaust pipe (6).

5. The monopile foundation for improving the power quality of a wind farm according to claim 2, characterized in that: The accommodating chamber extends through the end of the second body (12) away from the first body (11); The single pile foundation for improving the electric energy quality of a wind farm further comprises a blocking member (7), wherein the blocking member (7) is installed at the bottom of the steel pipe pile (1) to block the pile bottom.

6. The monopile foundation for improving the power quality of a wind farm according to claim 2, characterized in that: Also includes: A construction and operation maintenance passage (42), wherein the construction and operation maintenance passage (42) is installed inside the accommodating chamber, and reaches the water-proof working platform (41), the construction and operation maintenance platform (43) and the blocking member (7) in sections through the construction and operation maintenance passage (42).

7. The monopile foundation for improving the power quality of a wind farm according to claim 2, characterized in that: The construction and operation and maintenance platform (43) is arranged inside the accommodating chamber and at the elevation where the bottoms of the upper cavern (31) and the lower cavern (32) are located.

8. The monopile foundation for improving the power quality of a wind farm according to any one of claims 2 to 7, characterized in that: The lower hole storehouses (32) may be arranged in one group or in multiple groups. When multiple groups are arranged, two adjacent groups of the lower hole storehouses (32) are arranged at intervals along the height direction.

9. The monopile foundation for improving the power quality of a wind farm according to any one of claims 1 to 7, characterized in that: Also includes: an equipment platform (44), the equipment platform (44) being arranged inside the accommodating chamber, and the equipment platform (44) being located inside the first body (11); Wherein, the power transmission and transformation equipment (21) is installed on the equipment platform (44).

10. The monopile foundation for improving the power quality of a wind farm according to any one of claims 1 to 7, characterized in that: Also includes: An offshore wind power tower and a generator set (8), wherein the offshore wind power tower and a generator set (8) are installed at an end of the first body (11) away from the second body (12).

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