Construction power supply system based on multi-pile steel bearing platform type offshore wind turbine foundation

Abstract

The invention relates to the technical field of offshore power supply, and discloses a construction power supply system based on a multi-pile steel bearing platform type offshore wind turbine foundation, which comprises a wind turbine foundation unit, a power generation unit and a power supply unit. The fan foundation assembly comprises a first pipe pile, a second pipe pile and a bearing platform arranged at the tops of the pipe piles, wherein the bottoms of the first pipe pile and the second pipe pile are communicated. The power generation unit comprises a wind power generation module and a hydroelectric generation module, an energy conversion sub-module in the hydroelectric generation module can utilize seawater entering the first pipe pile to generate power, and a drainage sub-module is arranged on the second pipe pile and used for draining water in the pipe piles. The construction power supply unit is connected with the wind power generation module and the hydroelectric generation module, and is also connected with a construction power utilization facility through a power supply cable. Power can be supplied to construction power utilization facilities built in an offshore wind plant, the hydroelectric generation module utilizes seawater as a working medium for power generation, the power generation process is clean and free of pollution, the seawater can be obtained locally and is easy to obtain, and the cost is low.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore power supply, and in particular to a construction power supply system based on a multi-pile steel cap type offshore wind turbine foundation. Background Art

[0002] As the global demand for clean energy continues to increase, offshore wind power has become an important direction for global wind power development due to its advantages such as rich resources, high power generation efficiency and no occupation of onshore land resources. It is also conducive to promoting the transformation of energy structure.

[0003] Multi-pile steel cap-type offshore wind turbine foundation is widely used because of its good bearing capacity and moderate construction ship requirements. Multi-pile steel cap-type offshore wind turbine foundation includes: cap and multiple foundation piles. Now the cap is mostly made of steel, and the foundation piles are mostly made of steel pipe piles. Multiple steel pipe piles are driven into the seabed, and then the steel cap plug is inserted into the top of the steel pipe pile. High-strength grouting material is injected between the steel cap and the top of the steel pipe pile to form a stable wind turbine foundation. Then the tower of the wind turbine is set on the steel cap, and the wind turbine can be stably connected to the grid for power generation.

[0004] During the construction phase of an offshore wind farm, a construction power supply system needs to be set up. For example, wind farm equipment commissioning, engineering equipment (small cranes, welders, grouting material mixers, air compressors, etc.), handheld power tools, as well as temporary lighting equipment, temporary communication base stations, and construction monitoring equipment all require electricity. During the construction phase of an offshore wind farm, there is usually no condition for using shore power. Currently, temporary power supply is generally provided by the power supply system of a construction ship or a mobile diesel generator. However, on the one hand, the cost of transportation and use of diesel power generation is relatively high; on the other hand, the diesel used by diesel generators is not a clean energy source and will cause pollution. Summary of the invention

[0005] In view of this, the present invention provides a construction power supply system based on a multi-pile steel cap type offshore wind turbine foundation to solve the problem of lack of conditions for using shore power during the construction phase of the offshore wind farm, and the need for temporary power supply through construction ships or diesel generators, the high transportation cost of diesel, the difficulty of transporting diesel and the pollution it will cause.

[0006] In a first aspect, the present invention provides a construction power supply system based on a multi-pile steel cap type offshore wind turbine foundation, comprising:

[0007] A wind turbine foundation unit, the wind turbine foundation unit comprising: a first pipe pile, a second pipe pile and a cap, the bottoms of the first pipe pile and the second pipe pile are connected through a connecting pipe, and the cap is connected to the tops of the first pipe pile and the second pipe pile;

[0008] A power generation unit, the power generation unit comprises: a wind power generation module and a hydropower generation module, the wind power generation module is arranged on the foundation, the hydropower generation module comprises: an energy conversion submodule and a drainage submodule, a water inlet is opened on the first pipe pile, and the water inlet is located above the energy conversion submodule, the energy conversion submodule is suitable for generating electricity by using seawater entering the first pipe pile from the water inlet, the drainage submodule is arranged on the second pipe pile, and comprises: a pumping facility and a drainage facility connected, and one end of the drainage facility extends out of the outside of the wind turbine foundation unit, the pumping facility is used to pump the seawater in the second pipe pile to the drainage facility, and the drainage facility is used to discharge the seawater to the outside of the wind turbine foundation unit;

[0009] A construction power supply unit is arranged on the foundation, the construction power supply unit is connected to the wind power generation module and the hydropower generation module, and the construction power supply unit is connected to the construction power facilities through a power supply cable.

[0010] Beneficial Effects

[0011] The wind power generation module in the power generation unit can generate electricity using offshore wind energy, the energy conversion submodule in the hydropower generation module can generate electricity using seawater, and the drainage submodule can discharge the seawater in the pipe pile, so that the hydropower generation module can achieve adjustable intermittent multiple power generation. The electric energy generated by the wind power generation module and the hydropower generation module is transmitted to the construction power supply unit, which is uniformly distributed by the construction power supply unit. During the conventional operation stage of the offshore wind farm, the electric energy generated by the wind power generation module is supplied to the relevant power facilities and booster stations, and then transmitted to the power grid. In this application, during the construction stage of the offshore wind farm, the electric energy generated by the wind power generation module and the hydropower generation module is supplied to the tools, equipment, facilities, etc. that need electricity during the construction of the offshore wind farm, so as to meet various temporary electricity needs during the construction process. Moreover, the energy conversion submodule and its drainage submodule reasonably utilize the internal space of the pipe pile and the cap, and the construction of the construction power supply system is relatively small for the modification of the existing multi-pile steel cap type offshore wind turbine foundation and electrical equipment. The hydropower generation module uses seawater to generate electricity, and the power generation process is clean and pollution-free. Moreover, seawater can be obtained locally, is relatively easy to obtain, and has a low cost.

[0012] In an optional embodiment, the energy conversion submodule includes: a hydroelectric generator and a water-proof platform, the water-proof platform is arranged in the first pipe pile and is located below the water inlet, the water-proof platform has a water pipe, and the hydroelectric generator is arranged in the water pipe.

[0013] In an optional embodiment, the energy conversion submodule further includes: a control gate valve, wherein the control gate valve is arranged at the water outlet end of the water pipe.

[0014] Beneficial Effects

[0015] After setting the control gate valve, the water pipe can be opened and closed by controlling the opening and closing of the gate valve, and then the hydroelectric generator can be controlled to generate electricity, making the hydroelectric power generation process controllable. In addition, by setting up a water-blocking platform, a part of seawater can be pre-stored above the hydroelectric generator to form a head difference, which is beneficial to the start-up and operation of the hydroelectric generator.

[0016] In an optional embodiment, the energy conversion sub-module also includes: a first cavern and a second cavern, the first cavern is arranged on the first pipe pile and connected to the first pipe pile, and the first cavern is located between the seabed surface and the hydroelectric generator, the second cavern is arranged on the first pipe pile and connected to the first pipe pile, and the second cavern is located below the hydroelectric generator.

[0017] Beneficial Effects

[0018] The first cavern can store some seawater in advance, so that when hydroelectric power is generated, the first cavern cooperates with the water inlet to increase the power generation time and power generation of the hydroelectric generator. At the same time, in some cases where the demand for electricity is large, it can avoid the water inlet flow being too small to meet the technical requirements for the operation of the hydroelectric generator.

[0019] In an optional embodiment, the pumping facility includes: a plurality of pumping components spaced apart along a height direction of the second pipe pile, and the construction power supply unit is electrically connected to the pumping components.

[0020] Beneficial Effects

[0021] Multiple pumping parts at different heights can work together to meet the lift requirements and achieve higher pumping efficiency.

[0022] In an optional embodiment, the drainage facility includes: a drainage pipe, the drainage pipe is connected to the pumping member, and one end of the drainage pipe extends out of the fan base unit.

[0023] Beneficial Effects

[0024] When the construction power load is low, the energy conversion module does not work, and the seawater pumped out by the pumping device can be discharged in time through the drainage pipe to ensure that the seawater flowing through the hydroelectric generator can be temporarily stored in the space below the water-blocking platform when the energy conversion module generates electricity next time.

[0025] In an optional embodiment, the bottom ends of the first pipe pile and the second pipe pile are provided with a waterproof bottom seal.

[0026] Beneficial Effects

[0027] The waterproof bottom seal can prevent seawater from penetrating into the interior of the pile and occupying the internal space of the pile. In addition, the waterproof bottom seal can also serve as a working platform, providing convenience for workers in construction and operation and maintenance.

[0028] In an optional embodiment, the foundation 13 is provided with an operation and maintenance channel entrance 1312 within the top end range of the first pipe pile 11 and the second pipe pile 12 .

[0029] Beneficial Effects

[0030] By setting up the entrance of the operation and maintenance channel, the staff can enter the pipe pile from the foundation. The entrance of the operation and maintenance channel also serves as a vent, which can adjust the air pressure in the pipe pile when the hydropower module is working, thereby ensuring the smooth operation of the hydropower module.

[0031] In an optional embodiment, the construction power supply system based on the multi-pile steel cap type offshore wind turbine foundation also includes an operation and maintenance component arranged on the first pipe pile and the second pipe pile, and the operation and maintenance component includes: an operation and maintenance channel and an operation and maintenance platform, and the operation and maintenance channel and the operation and maintenance platform arranged in the same pipe pile are connected.

[0032] Beneficial Effects

[0033] By setting up operation and maintenance channels and platforms, it is convenient for workers to enter the pipe piles to carry out some construction and operation and maintenance work.

[0034] In an optional embodiment, the construction power supply system based on the multi-pile steel cap type offshore wind turbine foundation also includes ancillary facilities arranged on the wind turbine foundation unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 It is a schematic diagram of a construction power supply system based on a multi-pile steel cap type offshore wind turbine foundation according to an embodiment of the present invention.

[0037] Description of reference numerals:

[0038] 11. first pipe pile, 12. second pipe pile, 13. cap, 131. cap plug tip, 1311. plug tip hollow bottom plate, 1312. operation and maintenance channel entrance, 132. main platform, 14. connecting pipe, 15. water-proof bottom seal, 16. hollow mounting plate, 17. sealing element;

[0039] 21. Wind power generation module, 221. Energy conversion submodule, 2211. Water inlet, 2212. Hydroelectric generator, 2213. Water-blocking platform, 2214. Water pipe, 2215. Control gate valve, 2216. First cave reservoir, 2217. Second cave reservoir, 2221. Pumping unit, 2222. Drain pipe;

[0040] 3. Construction power supply unit, 31. Power supply cable, 32. Wind turbine collector cable, 33. Hydropower generator collector cable;

[0041] 41. Operation and maintenance channel, 42. Operation and maintenance platform;

[0042] 51. Boat fender, 52. Ladder, 53. Railing;

[0043] 6. Seabed;

[0044] 7. Sea surface. DETAILED DESCRIPTION

[0045] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0047] In the description of the present invention, 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 the present invention can be understood according to specific circumstances.

[0048] 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.

[0049] Combine the following Figure 1 An embodiment of the present invention is described. An embodiment of the present invention provides a construction power supply system based on a multi-pile steel cap type offshore wind turbine foundation. The construction power supply system includes a wind turbine foundation unit and a power generation unit. The wind turbine foundation unit includes: a first pipe pile 11, a second pipe pile 12 and a cap 13, the bottoms of the first pipe pile 11 and the second pipe pile 12 are connected through a connecting pipe 14, and the cap 13 is connected to the tops of the first pipe pile 11 and the second pipe pile 12. The power generation unit includes: a wind power generation module 21 and a hydropower generation module. The wind power generation module 21 is arranged on the foundation 13. The hydropower generation module includes: an energy conversion submodule 221 and a drainage submodule. The first pipe pile 11 is provided with a water inlet 2211, and the water inlet 2211 is located above the energy conversion submodule 221. The energy conversion submodule 221 is suitable for generating electricity by using seawater entering the first pipe pile 11 from the water inlet 2211. The drainage submodule is arranged on the second pipe pile 12. The drainage submodule includes: connected pumping facilities and drainage facilities, and one end of the drainage facility extends out of the outside of the wind turbine foundation unit. The pumping facility is used to pump the seawater in the second pipe pile 12 to the drainage facility, and the drainage facility is used to discharge the seawater to the outside of the wind turbine foundation unit. The construction power supply unit 3 is arranged on the foundation 13. The construction power supply unit 3 is connected to the wind power generation module 21 and the hydropower generation module, and the construction power supply unit 3 is connected to the power facilities through the power supply cable 31.

[0050] Specifically, the wind turbine foundation unit in this embodiment adopts the cap 13 and multiple pipe piles in the multi-pile steel cap type offshore wind turbine foundation, wherein the first pipe pile 11 is used to arrange the energy conversion submodule 221, and the second pipe pile 12 is used to arrange the drainage submodule. The number of the first pipe pile 11 and the second pipe pile 12 can be one or more. The first pipe pile 11 and the second pipe pile 12 will be driven into the seabed 6 to provide a stable support for the cap 13. And the internal space of the pipe pile is large enough for the energy conversion submodule 221 and the drainage submodule.

[0051] In addition, in order to cooperate with the energy conversion submodule 221 and the drainage submodule to achieve adjustable interval multiple power generation and simplify the equipment layout in each pipe pile, the bottom ends of the first pipe pile 11 and the second pipe pile 12 are connected through a connecting pipe 14 to achieve the flow of seawater between the pipe piles. Specifically, the connecting pipe 14 is buried in the seabed 6, and its setting position is close to the bottom ends of the first pipe pile 11 and the second pipe pile 12, so that the seawater in the first pipe pile 11 can be led to the second pipe pile 12, and the seawater retained in the first pipe pile 11 is reduced as much as possible. The connecting pipe 14 can be made of steel pipe or reinforced concrete pipe, and can be constructed by jacking or trenchless directional drilling. When the connecting pipe 14 is set, the axial direction of the connecting pipe 14 can be arranged horizontally, and the connecting pipe 14 can also be tilted downward at a certain angle to the side of the second pipe pile 12, so as to guide the seawater into the second pipe pile 12. The connecting pipe 14 is set to connect the internal space between the two pipe piles, and the energy conversion submodule 221 and the drainage submodule can be respectively set in different pipe piles, simplifying the equipment layout in each pile. The connecting pipe 14 also plays an auxiliary role in containing seawater, thereby increasing the power generation and power generation duration of hydroelectric power generation.

[0052] The connection mode of the cap 13 and the pipe pile is that the cap plug 131 is inserted from the top of the pipe pile. Specifically, the bottom end of the cap plug 131 is provided with a plug hollow bottom plate 1311, and the tops of the first pipe pile 11 and the second pipe pile 12 are both provided with a hollow mounting plate 16. After the cap plug 131 is inserted into the pipe pile, a seal 17 is provided between the plug hollow bottom plate 1311 and the hollow mounting plate 16, and grouting is performed between the plug hollow bottom plate 1311, the hollow mounting plate 16 and the seal 17 to connect the cap 13 and the pipe pile together.

[0053] The wind power generation module 21 in the power generation unit utilizes offshore wind energy to generate electricity, while the hydropower generation module utilizes seawater to generate electricity. The wind power generation module 21 is disposed on the support 13, and the wind power generation module 21 can select a conventional offshore wind power generation set.

[0054] The energy conversion submodule 221 and the drainage submodule in the hydroelectric power generation module need to work in coordination. Specifically, the water inlet 2211 is provided on the side wall of the first pipe pile 11, and a valve needs to be provided at the water inlet 2211 to control the on-off of the water inlet 2211 and the flow of seawater. The water inlet 2211 is located between the energy conversion submodule 221 and the sea surface 7, which means that the water inlet 2211 should be located below the sea surface 7 to facilitate direct access to seawater, and should also be located above the hydroelectric generator 2212 to facilitate the hydroelectric generator 2212 to generate electricity using the potential energy and kinetic energy of seawater. When hydroelectric power generation is needed, the water inlet 2211 is opened, and seawater flows into the first pipe pile 11 from the water inlet 2211, and the seawater drives the hydroelectric generator 2212 to generate electricity. After the water level in the first pipe pile 11 rises to the hydroelectric generator 2212, the power generation efficiency of the energy conversion submodule 221 begins to decrease. Therefore, after each hydroelectric power generation is completed, the seawater below the water-blocking platform 2213 in the first pipe pile 11 needs to be drained away through the drainage submodule to facilitate the next power generation of the hydroelectric generator 2212. Since the energy conversion submodule 221 has been set up in the first pipe pile 11, and the space below the water-blocking platform 2213 is limited, the drainage submodule is set up in the second pipe pile 12, and the first pipe pile 11 and the second pipe pile 12 are connected by a connecting pipe 14, so that the seawater in the first pipe pile 11 can flow into the second pipe pile 12, and the pumping facilities in the drainage submodule can pump the seawater into the drainage facilities, and the drainage facilities discharge the seawater to the outside of the fan base unit.

[0055] The construction power supply unit 3 is connected to the wind power generation module 21 through the wind turbine group collector cable 32, and is connected to the hydropower generation module 22 through the hydropower group collector cable 33. Wind power generation and hydropower generation are mutually complementary, and are controlled and regulated by the construction power supply unit 3 to transmit stable electric energy to meet the construction power demand and technical requirements. The construction power supply unit 3 is connected to the construction power facilities through the power supply cable 31 to provide electric energy for the construction power facilities. The electric energy generated by the wind power generation module 21 and the hydropower generation module 22 are all transmitted to the construction power supply unit 3, and are distributed to each construction power facility by the construction power supply unit 3. Specifically, the construction power supply unit 3 includes: a control device and a power transmission and transformation device connected thereto, and the control device preferably has an energy storage function. The control device is connected to the wind power generation module 21 and the hydropower generation module, that is, the wind power generation module 21 and the hydropower generation module transmit electric energy to the control device, and the control device then transmits the electric energy to the power transmission and transformation device, and the power transmission and transformation device provides relatively stable electric energy to the construction power facilities at other nearby operating locations for their use.

[0056] This construction power supply system can apply and adjust wind power generation and hydropower generation during the construction phase of the offshore wind farm, and can provide relatively stable electricity for welding, lighting, equipment debugging, etc. In the early stage of offshore wind turbine foundation construction, after the construction of the pipe piles and the cap 13 is completed, the wind power generation module 21 and the construction power supply unit 3 can be installed, and wind power generation can be used to provide electricity for subsequent construction including the construction of the hydropower module; immediately after the construction of the hydropower module is completed, wind power generation and hydropower generation can be used to provide electricity for subsequent construction. This construction power supply system solves the temporary construction power demand under the condition that the shore power is not available during the conventional offshore construction phase of the offshore wind farm, and this construction power supply system is based on the multi-pile steel cap type offshore wind turbine foundation for transformation, which will not occupy additional sea area, but reasonably utilizes the space inside the pipe pile. The structural changes and electrical equipment changes to the multi-pile steel cap type offshore wind turbine foundation are relatively small, which is convenient for construction. Among them, the hydropower module uses the most easily available and cheapest seawater in the ocean to generate electricity, and the entire power generation and power supply process is clean and pollution-free, and the cost is extremely low.

[0057] In one embodiment, a waterproof bottom seal 15 is disposed at the bottom ends of the first pipe pile 11 and the second pipe pile 12 .

[0058] The bottom ends of the first pipe pile 11 and the second pipe pile 12 are both located on the seabed 6. After the soil inside the pipe pile is removed, water in the soil of the seabed will seep out, and there is a possibility that seawater will seep into the pipe pile. A waterproof bottom seal 15 is provided at the bottom ends of the first pipe pile 11 and the second pipe pile 12 to prevent seawater from seeping into the pipe pile and occupying the internal space of the pipe pile. In addition, the waterproof bottom seal 15 can also serve as a working platform for construction and maintenance by workers, or as a support platform for arranging some equipment.

[0059] In one embodiment, the base 13 is provided with an operation and maintenance channel entrance 1312 within the top range of the first pipe pile 11 and the second pipe pile 12. By setting the operation and maintenance channel entrance 1312, the staff can enter the pipe piles from the base 13. The operation and maintenance channel entrance 1312 also serves as a vent, which can adjust the air pressure in the pipe pile when the hydropower module is working, thereby ensuring the smooth operation of the hydropower module.

[0060] In one embodiment, the energy conversion submodule 221 includes: a hydroelectric generator 2212 and a water-blocking platform 2213. The water-blocking platform 2213 is arranged in the first pipe pile 11 and is located below the water inlet 2211. The water-blocking platform 2213 is sealed and connected to the first pipe pile 11 to prevent seawater leakage. The water-blocking platform 2213 has a water pipe 2214, and the hydroelectric generator 2212 is arranged in the water pipe 2214. The arrangement of the hydroelectric generator 2212 in the water pipe 2214 can realize that all seawater flows from the water pipe 224 through the hydroelectric generator 2212, and the seawater drives the hydroelectric generator 2212 to generate electricity.

[0061] In one embodiment, the energy conversion submodule 221 further includes: a control gate valve 2215 , which is disposed at the water outlet end of the water pipe 2214 .

[0062] The water pipe 2214 is provided with a control gate valve 2215, so that the on-off of the water outlet of the water pipe 2214 can be controlled. Specifically, when the diameter of the water pipe is small, the control gate valve 2215 can be a valve, and when the diameter of the water pipe is large, the control gate valve 2215 can be a gate.

[0063] The control gate valve 2215 can be set to control whether the hydroelectric generator 2212 can generate electricity. Even if seawater flows in from the water inlet 2211, the hydroelectric generator 2212 cannot continue to generate electricity after the control gate valve 2215 is closed. In this way, when the power generation is stopped, a part of seawater can be stored above the water-blocking platform 2213 to form a head difference when hydroelectric power generation is needed, which is conducive to the start-up and operation of the hydroelectric generator 2212.

[0064] In one embodiment, the pumping facility includes: a plurality of pumping components 2221 spaced apart along the height direction of the second pipe pile 12 , and the construction power supply unit 3 is electrically connected to the pumping components 2221 .

[0065] Specifically, a plurality of pumping parts 2221 can be arranged at different heights in the second pipe pile 12, and the pumping parts 2221 are preferably water pumps. In the present embodiment, two water pumps are arranged, one of which is arranged on the waterproof bottom 15 at the bottom end of the second pipe pile 12, and the other is arranged on the operation and maintenance platform 42 above it, and is roughly at the same horizontal position as the hydroelectric generator 2212. Starting the water pump can pump out the water in the second pipe pile 12. Since the water pump needs to be driven by electricity, each water pump can be connected to the construction power supply unit 3, and the construction power supply unit 3 uses the electric energy of the wind power generation module 21 for power supply.

[0066] The combined use of multiple pumps can meet the lift requirements and smoothly discharge the seawater to the outside of the fan foundation assembly. Moreover, it can be powered by the construction power supply unit 3 without external power supply.

[0067] In one embodiment, the drainage facility includes: a drainage pipe 2222 , the drainage pipe 2222 is connected to the water outlet of the pumping member 2221 , and one end of the drainage pipe 2222 extends out of the second pipe pile 12 .

[0068] Specifically, the drain pipe 2222 is arranged in the vertical direction, and the drain pipe 2222 is connected to each pumping member 2221 (i.e., a pump), and the other end extends upward, passes through the hollow mounting plate 16 of the second pipe pile 12, the hollow bottom plate 1311 of the plug tip 131 of the cap 13, and finally passes through the operation and maintenance channel entrance 1312 of the cap 13. The pump can discharge seawater back into the ocean after pumping seawater into the drain pipe 2222, and a valve can also be provided at the outlet of the drain pipe 2222.

[0069] After the drainage pipe 2222 is set, seawater can be transported from the bottom to the top of the second pipe pile 12, and the seawater used for power generation by the energy conversion module 221 can be discharged, ensuring that there is enough space inside the first pipe pile 11 and the second pipe pile 12 to temporarily store the seawater flowing through the hydroelectric generator 2212, so as to facilitate the next power generation work of the energy conversion module 221.

[0070] In one embodiment, the energy conversion submodule 221 further includes: a first cavern 2216 and a second cavern 2217, wherein the first cavern 2216 is disposed on and communicated with the first pipe pile 11, and the first cavern 2216 is located between the surface of the seabed 6 and the energy conversion submodule 221, the second cavern 2217 is disposed on and communicated with the first pipe pile 11, and the second cavern 234 is located below the hydropower generation module 22. The first cavern 2216 generally retains some seawater inside, but the second cavern 2217 is generally in an empty state.

[0071] Seawater enters the first pipe pile 11 from the water inlet 2211. When the control gate valve 2215 is closed, the seawater can be retained in the first cavern 2216. In this way, during the next hydroelectric power generation, the first cavern 2216 cooperates with the water inlet 2211 to increase the power generation time and power generation of the hydroelectric generator 2212. At the same time, when the power demand is large and the flow rate of the water inlet 2211 is relatively small and cannot meet the technical requirements for the operation of the hydroelectric generator, the seawater pre-stored in the first cavern 2216 can have the effect of buffering and regulating.

[0072] In one embodiment, the construction power supply system also includes an operation and maintenance component arranged on the first pipe pile 11 and the second pipe pile 12, and the operation and maintenance component includes: an operation and maintenance channel 41 and an operation and maintenance platform 42, and the operation and maintenance channel 41 and the operation and maintenance platform 42 arranged in the same pipe pile are connected.

[0073] The maintenance channel 41 enables the staff to enter the pile from the maintenance channel entrance 1312 of the foundation 13, and the staff can carry out relevant work when they arrive at the maintenance platform 42. Since both the water-proof platform 2213 and the water-proof bottom 15 can also serve as the maintenance platform 42, in this embodiment, the maintenance channel 41 is set in both the first pile 11 and the second pile 12, and only one maintenance platform 42 is set in the second pile 12 as the bearing platform of the pumping unit 231.

[0074] In one embodiment, the construction power supply system further includes auxiliary facilities arranged on the wind turbine base unit.

[0075] Specifically, the auxiliary facilities include: a fender 51, a ladder 52 and a railing 53. The fender 51 is arranged on the outer wall of the first pipe pile 11 and the second pipe pile 12 to facilitate the docking of the ship. The ladder 52 is arranged on the foundation 13 and the pipe pile. The railing 53 is arranged on the main platform 132 of the foundation 13 to play a protective role.

[0076] The working process of the construction power supply system provided in this embodiment is described below:

[0077] The power generation process of the wind power generation module 21 is the same as the power generation process of a conventional offshore wind turbine generator set using wind energy, which will not be described in detail here. The electric energy generated by the wind power generation module 21 can be transmitted to the construction power supply unit 3 through the wind turbine generator set collector cable 32.

[0078] The power generation process of the hydroelectric power generation module is as follows:

[0079] Normally, the water inlet 2211 is opened to allow some seawater to be pre-stored in the space above the water-blocking platform 2213 in the first pipe pile 11 and in the first cavern 2216 .

[0080] When hydroelectric power generation is needed, the water inlet 2211 is opened to allow seawater to enter the first pipe pile 11. The seawater drives the hydroelectric generator 2212, which generates electricity using the kinetic energy and potential energy of the seawater and transmits the electric energy to the construction power supply unit 3 through the hydroelectric unit collector cable 24. The construction power supply unit 3 transmits the electric energy to the power facilities at the construction location.

[0081] During hydroelectric power generation, seawater falls from the hydroelectric generator 2212 to the bottom of the first pipe pile 11, and flows into the second pipe pile 12 through the connecting pipe 14. When the construction power load is low, the pumping member 2221 works to extract seawater and transport it to the drain pipe 2222, and then discharges it to the outside of the foundation 13 through the drain pipe 2222.

[0082] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A construction power supply system based on a multi-pile steel cap type offshore wind turbine foundation, characterized in that: include: A wind turbine foundation unit, the wind turbine foundation unit comprising: a first pipe pile (11), a second pipe pile (12) and a cap (13), the bottoms of the first pipe pile (11) and the second pipe pile (12) being connected via a connecting pipe (14), and the cap (13) being connected to the tops of the first pipe pile (11) and the second pipe pile (12); A power generation unit, the power generation unit comprising: a wind power generation module (21) and a hydropower generation module, the wind power generation module (21) being arranged on the foundation (13), the hydropower generation module comprising: an energy conversion submodule (221) and a drainage submodule, the energy conversion submodule (221) being arranged in the first pipe pile (11), the first pipe pile (11) being provided with a water inlet (2211), and the water inlet (2211) being located above the energy conversion submodule (221), the energy conversion submodule (221) being suitable for generating electricity by using seawater entering the first pipe pile (11) from the water inlet (2211), the drainage submodule being arranged on the second pipe pile (12), comprising: a pumping facility and a drainage facility connected to each other, and one end of the drainage facility extending out of the outside of the wind turbine foundation unit, the pumping facility being used to pump the seawater in the second pipe pile (12) to the drainage facility, and the drainage facility being used to discharge the seawater to the outside of the wind turbine foundation unit; A construction power supply unit (3), the construction power supply unit (3) is arranged on the support platform (13), the construction power supply unit (3) is connected to the wind power generation module (21) and the hydropower generation module, and the construction power supply unit (3) is connected to construction power facilities at other nearby working locations through a power supply cable (31).

2. The construction power supply system based on multi-pile steel cap type offshore wind turbine foundation according to claim 1 is characterized in that: The energy conversion submodule (221) comprises: a hydroelectric generator (2212) and a water-blocking platform (2213); the water-blocking platform (2213) is arranged in the first pipe pile (11) and is located below the water inlet (2211); the water-blocking platform (2213) has a water pipe (2214); and the hydroelectric generator (2212) is arranged in the water pipe (2214).

3. The construction power supply system based on multi-pile steel cap type offshore wind turbine foundation according to claim 2 is characterized in that: The energy conversion submodule (221) further comprises: a control gate valve (2215), wherein the control gate valve (2215) is arranged at the water outlet end of the water pipe (2214).

4. The construction power supply system based on multi-pile steel cap type offshore wind turbine foundation according to claim 3 is characterized in that: The energy conversion submodule (221) further comprises: a first cavern (2216) and a second cavern (2217), wherein the first cavern (2216) is arranged on the first pipe pile (11) and is connected to the first pipe pile (11), and the first cavern (2216) is located between the surface of the seabed (6) and the hydroelectric generator (2212), and the second cavern (2217) is arranged on the first pipe pile (11) and is connected to the first pipe pile (11), and the second cavern (2217) is located below the hydroelectric generator (2212).

5. The construction power supply system based on multi-pile steel cap type offshore wind turbine foundation according to claim 1 is characterized in that: The water pumping facility comprises: a plurality of water pumping parts (2221) arranged at intervals along the height direction of the second pipe pile (12); the construction power supply unit (3) is electrically connected to the water pumping parts (2221).

6. The construction power supply system based on multi-pile steel cap type offshore wind turbine foundation according to claim 5 is characterized in that: The drainage facility comprises: a drainage pipe (2222), the drainage pipe (2222) is connected to the water pumping member (2221), and one end of the drainage pipe (2222) extends out of the fan base unit.

7. The construction power supply system based on multi-pile steel cap type offshore wind turbine foundation according to claim 1 is characterized in that: The bottom ends of the first pipe pile (11) and the second pipe pile (12) are provided with water-proof bottom seals (15).

8. The construction power supply system based on multi-pile steel cap type offshore wind turbine foundation according to claim 1 is characterized in that: The foundation (13) is provided with an operation and maintenance passage entrance (1312) within the top end range of the first pipe pile (11) and the second pipe pile (12).

9. The construction power supply system based on multi-pile steel cap type offshore wind turbine foundation according to claim 1 is characterized in that: It also includes an operation and maintenance component arranged on the first pipe pile (11) and the second pipe pile (12), the operation and maintenance component including: an operation and maintenance channel (41) and an operation and maintenance platform (42), and the operation and maintenance channel (41) and the operation and maintenance platform (42) arranged in the same pipe pile are connected.

10. The construction power supply system based on a multi-pile steel cap type offshore wind turbine foundation according to any one of claims 1 to 9, characterized in that: It also includes auxiliary facilities arranged on the wind turbine base unit.

Images