Emergency power supply system based on multi-leg offshore wind turbine foundation

Abstract

The present invention relates to the technical field of emergency power supply for offshore platforms, and discloses an emergency power supply system based on a multi-leg type offshore wind turbine foundation. The emergency power supply system includes: a wind turbine foundation assembly, an electrical assembly, and a water guiding and drainage assembly. The central shaft cylinder of the wind turbine foundation assembly is connected to the top of the pipe pile through inclined support pipes, horizontal support pipes, and connecting sleeves; the electrical assembly includes: an emergency power generation device and a power supply device. The emergency power generation device is arranged inside the horizontal support pipe and is adapted to generate electricity by using seawater entering the horizontal support pipe through the water inlet and outlet. The power supply device is arranged in the central shaft cylinder and is electrically connected to the emergency power generation device; the water guiding and drainage assembly is arranged inside the wind turbine foundation assembly and is used for guiding the water flow or draining the seawater in the pipe pile. The present invention uses seawater for power generation, which has low cost and is easy to obtain, and can meet the emergency power supply requirements of the offshore wind farm when the wind turbine generator sets are shut down. The main components are arranged in the internal space of the multi-leg type offshore wind turbine foundation and do not additionally occupy spaces such as the outer platform.

Description

Technical Field

[0001] The present invention relates to the technical field of emergency power supply for offshore platforms, and particularly relates to an emergency power supply system based on a multi-leg type offshore wind turbine foundation. Background Art

[0002] Offshore wind power generation is a clean energy technology that utilizes offshore wind resources. The multi-leg type offshore wind turbine foundation is a commonly used type of wind turbine foundation, with a clear force transmission path, strong stability, and wide application. The multi-leg type offshore wind turbine foundation includes: a central shaft cylinder, inclined support pipes, horizontal support pipes, connecting sleeves, and multiple steel pipe piles (generally not less than three), and the multiple steel pipe piles are dispersedly arranged with the central shaft cylinder as the center. Taking the tripod type wind turbine foundation as an example, the three steel pipe piles are arranged in an equilateral triangle and are respectively located at the three vertices, and the central shaft cylinder is arranged at the center of the equilateral triangle. The central shaft cylinder is connected to the top ends of the steel pipe piles through inclined support pipes, horizontal support pipes, and connecting sleeves to complete the construction of the wind turbine foundation. The tower of the wind power generating set is arranged on the central shaft cylinder to realize the connection with the wind turbine foundation and build an offshore wind power generation platform.

[0003] During the service period of the offshore wind power generation platform, due to human or weather factors, the wind power generating set may stop operating. Human factors such as the need to maintain or repair the wind power generating set, and weather factors such as typhoons, cold snaps, thunderstorms and other bad weather, as well as the influence of no wind or low wind weather, all of which may cause the wind power generating set to stop generating electricity or disconnect from the power grid. During the power outage period of the wind power generating set, in order to maintain the normal operation of the offshore wind power generation platform, there are still some facilities with power consumption requirements, such as wind turbine yaw and pitch (to adjust the wind turbine to the optimal posture to resist typhoons), fire emergency power, hydro-meteorological monitoring equipment (such as anemometers, wave height meters), structural monitoring equipment, video monitoring, navigation assistance systems (navigation safety warning lights, virtual AIS), offshore communication base stations, surveying RTK base stations, etc., which requires the offshore wind power generation platform to be equipped with an emergency power supply device.

[0004] At present, the offshore wind power generation platform realizes emergency power supply by configuring a battery pack or a diesel generator. However, the battery pack stores a limited amount of electricity, usually only able to maintain for a few hours, and has a huge volume; the diesel generator needs to take in air and discharge exhaust gas, and diesel, as a raw material, is not easily replenished at sea, with high operation and maintenance costs, and the diesel generator will cause pollution and carbon emissions during use. In addition, the setting of the battery pack or the diesel generator will occupy the installation space of the outer platform on the multi-leg type offshore wind turbine foundation. Summary of the Invention

[0005] In view of this, the present invention provides an emergency power supply system based on a multi-leg type offshore wind turbine foundation to solve the problems that setting up a battery pack or a diesel generator set for emergency power supply will occupy the installation space of the outer platform on the multi-leg type offshore wind turbine foundation, and the power stored in the battery pack is limited, using diesel power generation will cause pollution, and at the same time, diesel is not easy to replenish at sea and the operation and maintenance cost is relatively high.

[0006] In a first aspect, the present invention provides an emergency power supply system based on a multi-leg type offshore wind turbine foundation, including:

[0007] A wind turbine foundation assembly, the wind turbine foundation assembly includes: a central shaft cylinder, a diagonal brace pipe, a connecting sleeve, a horizontal brace pipe and a pipe pile. An inlet and outlet is provided at the bottom end of the central shaft cylinder. The connecting sleeve is connected to the top end of the pipe pile. One end of the diagonal brace pipe is connected to the central shaft cylinder, and the other end is connected to the connecting sleeve. One end of the horizontal brace pipe is connected to the central shaft cylinder, and the other end is connected to the connecting sleeve. And the central shaft cylinder, the diagonal brace pipe, the connecting sleeve, the horizontal brace pipe and the pipe pile are internally connected and communicated;

[0008] An electrical assembly, the electrical assembly includes: an emergency power generation device and a power supply device. The emergency power generation device is arranged inside the horizontal brace pipe. The emergency power generation device is adapted to generate electricity by using seawater entering the horizontal brace pipe from the inlet and outlet. The power supply device is arranged in the central shaft cylinder and is electrically connected to the emergency power generation device;

[0009] A water guiding and draining assembly, the water guiding and draining assembly is used for guiding water flow or draining the seawater in the pipe pile. It includes: a pumping member, a drain pipe and a water guiding pipe. The pumping member is arranged inside the pipe pile. The water inlet end of the drain pipe is connected to the pumping member, and its water outlet end passes through the pipe pile, the connecting sleeve, the diagonal brace pipe and extends to the central shaft cylinder. One end of the water guiding pipe is located inside the horizontal brace pipe, on the tail water side of the emergency power generation device, and the other end extends into the pipe pile. And a gate is arranged on the water guiding pipe.

[0010] Beneficial effects

[0011] The emergency power generation equipment generates electricity by using the seawater that enters the horizontal support pipe from the water inlet and outlet of the central shaft cylinder, and transmits the electric energy to the power supply equipment. The power supply equipment distributes the electricity. During the emergency stage, the continuous operation of the emergency power generation equipment is ensured. That is, in the case of power failure of the wind turbine generator set, emergency power generation and power supply can be carried out through the electrical components. During the non-emergency stage, the seawater can be drained away through the water guiding and drainage components to prepare for the next operation of the emergency power generation equipment. Moreover, the working medium used for power generation is seawater, which is easy to obtain, has sufficient water volume, and low cost. In addition, the electrical components and the water guiding and drainage components are basically arranged and installed inside the pipe pile, connecting sleeve, inclined support pipe, horizontal support pipe and central shaft cylinder, that is, the internal space of the multi-leg type offshore wind turbine foundation is utilized, and the installation space outside the wind turbine foundation platform will not be occupied additionally.

[0012] And through the pumping component, the seawater that enters the pipe pile after being used by the emergency power generation equipment can be pumped away to prepare for the next operation of the emergency power generation equipment. The seawater in the pipe pile is discharged into the central shaft cylinder through the drain pipe, and the excess part is discharged into the sea, which can improve the pressure difference of the power generation hydraulic pipeline as much as possible and is beneficial to power generation. The water guiding pipe is arranged on the tail water side of the emergency power generation equipment to guide the water flow. After setting the gate, the on-off and the flow rate of the water guiding pipe can be controlled. Furthermore, the power generation power of the emergency power generation equipment can be assisted to be adjusted.

[0013] In an implementation manner, the connecting sleeve sleeves the top end of the pipe pile, and the connecting sleeve and the pipe pile are connected and fixed by a cementitious material.

[0014] Beneficial effects

[0015] The central shaft cylinder is connected to the pipe pile through the connecting sleeve, inclined support pipe and horizontal support pipe. The connecting sleeve of this structure sleeves the top end of the pipe pile, and the connection is stable and convenient. The pipe pile has a good supporting effect on the central shaft cylinder. And through the connecting sleeve, inclined support pipe and horizontal support pipe, the internal spaces of the pipe pile and the central shaft cylinder can be communicated to provide more space for installing facilities or arranging pipelines.

[0016] In an implementation manner, an exhaust port is opened on the connecting sleeve.

[0017] Beneficial effects

[0018] By setting the exhaust port, the air pressure in the pipe pile can be adjusted to ensure the smooth operation of the power generation components and the water guiding and drainage components.

[0019] In an optional implementation manner, the pumping component is electrically connected to the power supply equipment.

[0020] Beneficial effects

[0021] During the non-emergency stage, the power supply equipment supplies power to the pumping component, and there is no need to additionally equip a power supply equipment for the pumping component.

[0022] In an alternative embodiment, a cave is provided at the bottom of the pipe pile, and the cave communicates with the pipe pile.

[0023] Beneficial effects

[0024] Providing a cave can increase the water storage space inside the pipe pile, prevent the water level in the pipe pile from rising rapidly, and affect the operation of the emergency power generation equipment.

[0025] In an alternative embodiment, a water-proof bottom seal is provided at the bottom end of the pipe pile.

[0026] Beneficial effects

[0027] The water-proof bottom seal improves the sealing performance of the pipe pile, preventing seawater from seeping into the inside of the pipe pile and occupying space. And the water-proof bottom seal can also serve as a working platform, providing convenience for workers' construction and operation and maintenance.

[0028] In an alternative embodiment, the emergency power supply system based on the multi-leg type offshore wind turbine foundation further includes an operation and maintenance passage provided in the central shaft cylinder.

[0029] Beneficial effects

[0030] By providing an operation and maintenance passage, it is convenient for staff to enter for some operation and maintenance work.

[0031] In an alternative embodiment, the emergency power supply system based on the multi-leg type offshore wind turbine foundation further includes auxiliary facilities provided on the wind turbine foundation assembly. Description of the drawings

[0032] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0033] Figure 1 Schematic diagram of the emergency power supply system based on the multi-leg type offshore wind turbine foundation of the present invention using a water turbine generator;

[0034] Figure 2 Schematic diagram of the emergency power supply system based on the multi-leg type offshore wind turbine foundation of the present invention using a pump-turbine.

[0035] Description of the reference numerals:

[0036] 11. Central shaft cylinder, 111. Water inlet and outlet, 12. Inclined support pipe, 13. Connecting sleeve, 131. Exhaust port, 14. Horizontal support pipe, 15. Pipe pile, 151. Water-proof bottom seal;

[0037] 21. Emergency power generation equipment, 22. Power supply equipment;

[0038] 31. Pumping component, 32. Drain pipe, 33. Water guide pipe, 34. Gate, 35. Underground storage;

[0039] 4. Operation and maintenance passage;

[0040] 51. Fender, 52. Ladder, 53. Rail;

[0041] 6. Seabed;

[0042] 7. Sea surface;

[0043] 8. Wind turbine generator set and tower. Detailed implementation manners

[0044] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0045] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is 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 a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0046] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0047] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0048] During the power outage of a wind turbine generator set, in order to maintain the normal operation of an offshore wind power platform, there are still some facilities with power consumption requirements, such as the yaw and pitch of the wind turbine (to adjust the wind turbine to the optimal posture to resist typhoons), emergency power for fire protection, hydro-meteorological monitoring equipment (such as anemometers, wave height gauges), structural monitoring equipment, video monitoring, navigation aids system (navigation safety warning lights, virtual AIS), offshore communication base stations, surveying RTK base stations, etc. This requires the offshore wind power platform to be equipped with an emergency power supply device.

[0049] In the related art, a battery pack or a diesel generator is set on the basis of a multi-legged offshore wind turbine for emergency power supply to cope with the situation of power outage when the wind turbine generator set stops. The battery capacity is limited, and the battery pack is relatively large in volume; to avoid fires caused by battery failures and to cope with the harsh offshore environment, the battery pack is generally placed in a cabin welded by metal profiles on the outer platform, occupying a certain space on the outer platform. The diesel generator and the corresponding power transmission and transformation equipment are used to generate and supply power. The diesel generator uses diesel as the power source, needs to take in air and discharge exhaust gas, and is preferably placed on the outer platform; it is not easy to replenish diesel offshore, and the operation and maintenance cost is relatively high; it will cause certain pollution and carbon emissions.

[0050] In view of the above problems existing in the emergency power supply by setting a battery pack or a diesel generator, the present application proposes an emergency power supply system based on the foundation of a multi-legged offshore wind turbine, which can reasonably utilize the space inside the original multi-legged offshore wind turbine foundation and generate electricity using seawater as the working medium, without causing pollution, being easily accessible, and having extremely low costs.

[0051] The following is combined with Figure 1Describe embodiments of the present invention. Embodiments of the present invention provide an emergency power supply system based on a multi-leg offshore wind turbine foundation, comprising: a wind turbine foundation assembly, an electrical assembly, and a water guiding and drainage assembly. The wind turbine foundation assembly includes: a central shaft cylinder 11, a diagonal bracing pipe 12, a connecting sleeve 13, a horizontal bracing pipe 14, and a pipe pile 15. An inlet and outlet 111 is provided at the bottom end of the central shaft cylinder 11. One end of the diagonal bracing pipe 12 is connected to the central shaft cylinder 11, and the other end is connected to the connecting sleeve 13; the connecting sleeve 13 is connected to the top end of the pipe pile 15; one end of the horizontal bracing pipe 14 is connected to the central shaft cylinder 11, and the other end is connected to the connecting sleeve 13; and the interiors of the central shaft cylinder 11, the diagonal bracing pipe 12, the connecting sleeve 13, the horizontal bracing pipe 14, and the pipe pile 15 are in communication. The electrical assembly includes: an emergency power generation device and a power supply device. The emergency power generation device is disposed inside the horizontal bracing pipe and is adapted to generate electricity using seawater that enters the horizontal bracing pipe from the inlet and outlet. The power supply device is disposed in the upper part of the central shaft cylinder and is electrically connected to the emergency power generation device. A water guiding and drainage assembly, the water guiding and drainage assembly is used to guide water flow or drain the seawater in the pipe pile 15, and it includes: a pumping member 31, a drain pipe 32, and a water guiding pipe 33. The pumping member 31 is disposed inside the pipe pile 15. The inlet end of the drain pipe 32 is connected to the pumping member 31, and its drain end extends through the pipe pile 15, the connecting sleeve 13, and the diagonal bracing pipe 12 to the central shaft cylinder 11. One end of the water guiding pipe 33 is located inside the horizontal bracing pipe 14, on the tail water side of the emergency power generation device 21, and the other end extends into the pipe pile 15, and a gate 34 is provided on the water guiding pipe 33.

[0052] The original structure of the fan foundation component, i.e., the multi-legged offshore fan foundation, has an outer platform built on the central axis cylinder 11, which serves as a construction and maintenance platform for the fan and a storage site for materials. A wind power generation unit and a tower 8 are arranged on the top of the central axis cylinder 11 to generate electricity by using the wind resources on the ocean. Since this type of fan foundation has multiple pipe piles 15, any number of pipe piles can be utilized according to requirements. In this embodiment, two of the pipe piles 15 are utilized. The pipe piles 15 are driven into the seabed 6, and multiple pipe piles 15 are arranged around the central axis cylinder 11. Each pipe pile 15 is connected to the central axis cylinder 11 through an inclined support pipe 12, a connecting sleeve 13, and a horizontal support pipe 14. In this way, the central axis cylinder 11 is supported from multiple directions by multiple horizontal support pipes 14 and multiple pipe piles 15, enabling it to be firmly located on the sea. After the fan foundation is set up, the pipe piles 15, the connecting sleeves 13, and the central axis cylinder 11 are partially below the sea surface 7 and partially above the sea surface 7. An inlet and outlet 111 is arranged at the bottom end of the central axis cylinder 11, that is, the inlet and outlet 111 is below the sea surface 7 to facilitate direct access to seawater, allowing seawater to enter the central axis cylinder 11. Gates, trash racks, etc. can be arranged at the inlet and outlet 111. In addition, the central axis cylinder 11, the inclined support pipe 12, the connecting sleeve 13, the horizontal support pipe 14, and the pipe piles 15 are all hollow pipes, and the joints are reasonably opened and interconnected to facilitate the arrangement of equipment and the laying of pipelines.

[0053] The electrical component has power generation and power supply functions. The power generation function is realized by the emergency power generation equipment 21. The emergency power generation equipment 21 can be a water turbine generator, which is arranged in the horizontal support pipe 14. And the position of the horizontal support pipe 14 is close to the inlet and outlet 111 to facilitate direct access to seawater from the inlet and outlet 111. When seawater flows through, the water turbine generator can convert the mechanical energy of the seawater into electrical energy to achieve hydraulic power generation. Seawater enters from one end of the horizontal support pipe 14 close to the inlet and outlet 111 and enters the pipe pile 15 through the water guide pipe 33. Since two pipe piles 15 in the multi-legged offshore fan foundation are applied in this embodiment, two sets of emergency power generation equipment 21 are also arranged correspondingly. That is, correspondingly, each pipe pile 15 is connected to the central axis cylinder 11 through an inclined support pipe 12 and a horizontal support pipe 14, and the emergency power generation equipment 21 is arranged in the horizontal support pipe 14. The power supply function is realized by the power supply equipment 22. The emergency power generation equipment 21 is connected to the power supply equipment 22 through a cable to send the generated electrical energy to the power supply equipment 22, and the power supply equipment 22 delivers the electrical energy to the electrical equipment. Specifically, the power supply equipment 22 includes a control device and a power transmission and transformation device connected to each other. The electrical energy generated by the emergency power generation equipment 21 is first transmitted to the control device through a cable, and then the power transmission and transformation device distributes and supplies the electrical energy to the electrical equipment.

[0054] In other embodiments, such as Figure 2 shown, the emergency power generation equipment 21 can also be a pump turbine.

[0055] During the non-emergency stage, the water guiding and draining assembly drains the seawater flowing into the pipe pile 15 through the horizontal support pipe 14. If the seawater flowing into the pipe pile 15 continuously from the water guiding pipe 33 after the emergency power generation equipment 21 is used but is not drained, the seawater level in the pipe pile 15 will rise. When the water level rises to the emergency power generation equipment 21, the emergency power generation equipment 21 will no longer be able to generate electricity. Therefore, during the non-emergency stage, it is necessary to drain the seawater through the water guiding and draining assembly to prepare for the next operation of the emergency power generation equipment.

[0056] Specifically, the water pumping member 31 is preferably a water pump, which can pump the seawater in the pipe pile 15 into the drain pipe 32. The number of the water pumping members 31 can be set to one or multiple ones spaced at intervals along the height direction of the pipe pile 15. When one water pumping member 31 is set, it can be directly arranged on the water-proof bottom seal 151 at the bottom end of the pipe pile 15. The combined use of multiple water pumping members 31 can meet the lift requirement and drain the seawater smoothly. The water inlet end of the drain pipe 32 is connected to the water pumping member 31, that is, the water pumped by the water pumping member 31 will be sent into the drain pipe 32. The water outlet end of the drain pipe 32 extends upward from the inside of the pipe pile 15, then enters the connecting sleeve 13 and the inclined support pipe 12 and extends until it reaches the central shaft cylinder 11. That is to say, the drain pipe 32 will finally drain the seawater into the central shaft cylinder 11. After the seawater enters the central shaft cylinder 11, it falls to the bottom of the central shaft cylinder 11 for the next power generation, and the excess seawater is discharged from the water inlet and outlet 111 of the central shaft cylinder 11.

[0057] Furthermore, the water guiding pipe 33 is in an L shape, with one end located inside the horizontal support pipe 14 and the other end located inside the pipe pile 15, guiding the seawater to flow into the pipe pile 15. The water guiding pipe 33 is fixed by the brackets arranged on the horizontal support pipe 14 and the pipe pile 15. In addition, a gate 34 is arranged at one end of the water guiding pipe 33 located inside the pipe pile 15, and the opening and closing of the gate 34 can control whether the water guiding pipe 33 can drain water into the pipe pile 15. In addition, when the emergency power generation equipment 21 is a water turbine generator, as Figure 1 shown, the water guiding pipe 33 only needs to extend to the middle of the pipe pile 15, but when the emergency power generation equipment 21 is a pump-turbine, as Figure 2 shown, the water guiding pipe 33 needs to extend to the bottom of the pipe pile 15; correspondingly, the water pumping member 31 and the drain pipe 32 are omitted, and the water guiding pipe 33 is used for drainage operation.

[0058] This emergency power supply system is transformed based on the multi-leg type offshore wind turbine foundation, reasonably utilizes the internal spaces of the central shaft cylinder 11, the inclined support pipe 12, the connecting sleeve 13, the horizontal support pipe 14 and the pipe pile 15, and improves the space utilization rate. The emergency power generation equipment 21 uses seawater for power generation. The power generation and power supply processes of the emergency power supply system are clean and pollution-free, and the seawater as the working medium is the most easily obtained and utilized resource in the ocean, with a low acquisition cost.

[0059] In one embodiment, the connecting sleeve 13 sleeves the top end of the pipe pile 15, and the connecting sleeve 13 and the pipe pile 15 are fixedly connected by a cementitious material.

[0060] Specifically, the axes of the central shaft cylinder 11 and the pipe pile 15 are both arranged in the vertical direction. The inclined support pipe 12 is in an inclined state, with its upper end connected to the side wall of the central shaft cylinder 11 and its lower end connected to the side wall of the connecting sleeve 13. The axis of the connecting sleeve 13 is also arranged in the vertical direction. The top end of the connecting sleeve 13 is partially open, and there is a rainproof and anti-falling member. The bottom end is open, and its diameter is larger than that of the pipe pile 15. In this way, the connecting sleeve 13 can be sleeved on the top end of the pipe pile 15, and the two can be fixedly connected by a cementitious material between the connecting sleeve 13 and the pipe wall of the pipe pile 15.

[0061] After connecting the pipe pile 15 and the central shaft cylinder 11 through the inclined support pipe 12, the horizontal support pipe 14 and the connecting sleeve 13, the pipe pile 15 provides stable support for the central shaft cylinder 11. At the same time, each connection part is partially open, and the internal space of the pipe pile 15 is communicated with the internal space of the central shaft cylinder 11, so as to facilitate the installation of equipment and the layout of pipelines, and the available space is relatively large.

[0062] In one embodiment, an exhaust port 131 is opened on the connecting sleeve, and the exhaust port 131 is provided with a rainproof member.

[0063] Specifically, the exhaust port 131 is opened on the top surface of the connecting sleeve 13, which can adjust the air pressure in the pipe pile 15 during use and avoid affecting power generation and drainage work.

[0064] In one embodiment, a water-proof bottom seal 151 is provided at the bottom end of the pipe pile 15.

[0065] The bottom ends of the pipe piles 15 are all located on the seabed 6. To prevent seawater from seeping into the pipe piles 15, a water-proof bottom seal 151 is provided at the bottom end of the pipe pile 15, and the water-proof bottom seal 151 can isolate seepage. Secondly, the water-proof bottom seal 151 can also serve as a working platform for workers to construct and maintain, or can also be used as a support member to arrange some equipment.

[0066] In one embodiment, the water pumping member 31 is electrically connected to the power supply device 22.

[0067] Since the power supply device 22 can receive the electric energy of the wind turbine above, and can also receive the electric energy of the emergency power generation system; and then supply power externally, while the water pumping member 31 needs electric power to drive the water pumping, so the water pumping member 31 is connected to the power supply device 22, and the power supply device 22 supplies power to the water pumping member 31, and there is no need to additionally equip a power supply device for the water pumping member 31.

[0068] In one embodiment, a cave depot 35 is provided at the bottom of the pipe pile 15, and the cave depot 35 is communicated with the pipe pile 15.

[0069] The setting of the underground reservoir 35 can improve the water storage capacity of the pipe pile 15, preventing the water level in the pipe pile 15 from rising rapidly and affecting the normal power generation of the emergency power generation equipment 21; thus effectively increasing the power generation duration and power generation amount.

[0070] In one embodiment, the emergency power supply system further includes an operation and maintenance passage 4 provided in the central shaft cylinder 11.

[0071] A common operation and maintenance passage 4 is, for example, a ladder. Through the operation and maintenance passage 4, the staff can enter and exit the central shaft cylinder 11, facilitating the staff to carry out construction, operation, and maintenance work inside the central shaft cylinder 11.

[0072] In one embodiment, the emergency power supply system further includes auxiliary facilities provided on the wind turbine foundation assembly.

[0073] The auxiliary facilities are some auxiliary facilities equipped for the wind turbine foundation. Specifically, the auxiliary facilities include: a fender 51, a ladder 52, and a railing 53. The fender 51 is provided on the outer wall of the pipe pile 15 to facilitate the docking of ships. The ladder 52 is provided on the multi-leg foundation, connecting the outer platform of the multi-leg foundation and the pipe pile 15. The railing 53 is provided on the outer platform of the multi-leg foundation to play a protective role.

[0074] The working process of the emergency power supply system provided in this embodiment is described below:

[0075] When the wind turbine needs to be shut down for maintenance or is forced to shut down due to bad weather, in order to maintain the uninterrupted operation of the offshore wind power platform equipment, emergency power supply can be carried out through the emergency power supply system.

[0076] During emergency power supply, first, open the water inlet and outlet 111 and the gate 34 to allow seawater to enter the central shaft cylinder 11, and the seawater can spread to the horizontal support pipe 14. When the seawater flows through the emergency power generation equipment 21, the emergency power generation equipment 21 can generate electricity, and then the electric energy is transmitted to the power supply equipment 22, and then distributed by the power supply equipment 22 to each electrical facility.

[0077] Synchronously, when the seawater flows out from the horizontal support pipe 14 and the water guide pipe 33 and enters the pipe pile 15, during the non-emergency stage, the pumping member 31 works to pump the seawater to the drain pipe 32. Then, part of the seawater is discharged into the central shaft cylinder 11 through the drain pipe 32, and part is discharged into the sea through the water inlet and outlet 111, which can maximize the pressure difference of the power generation hydraulic pipeline and is beneficial to power generation.

[0078] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An emergency power supply system based on a multi-pod offshore wind turbine foundation, characterized in that: include: A fan foundation assembly, the fan foundation assembly comprising: a central axis cylinder (11), an oblique support pipe (12), a connecting sleeve (13), a horizontal support pipe (14) and a pipe pile (15); a water inlet and outlet (111) is arranged at the bottom end of the central axis cylinder (11); one end of the oblique support pipe (12) is connected to the central axis cylinder (11), and the other end is connected to the connecting sleeve (13); the connecting sleeve (13) is connected to the top end of the pipe pile (15); one end of the horizontal support pipe (14) is connected to the central axis cylinder (11), and the other end is connected to the connecting sleeve (13); and the central axis cylinder (11), the oblique support pipe (12), the connecting sleeve (13), the horizontal support pipe (14) and the pipe pile (15) are internally connected; An electrical component, the electrical component comprising: an emergency power generation device (21) and a power supply device (22), the emergency power generation device (21) being arranged inside the horizontal support pipe (14), the emergency power generation device (21) being suitable for generating electricity by utilizing seawater entering the horizontal support pipe (14) from the water inlet and outlet (111), and the power supply device (22) being arranged on the central axis cylinder (11) and electrically connected to the emergency power generation device (21); A water guide and drainage assembly, the water guide and drainage assembly is used to guide water flow or drain seawater from the pipe pile (15), and comprises: a pumping member (31), a drainage pipe (32) and a water guide pipe (33); the water guide member (31) is arranged in the pipe pile (15); the water inlet end of the drainage pipe (32) is connected to the water guide member (31); the drainage end thereof passes through the pipe pile (15), the connecting sleeve (13), the diagonal support pipe (12) and extends to the central axis cylinder (11); one end of the water guide pipe (33) is located in the horizontal support pipe (14) and on the tail water side of the emergency power generation equipment (21); the other end extends into the pipe pile (15); and a gate (34) is provided on the water guide pipe (33).

2. The emergency power supply system based on a multi-pod offshore wind turbine foundation according to claim 1 is characterized in that: The connecting sleeve (13) covers the top end of the pipe pile (15), and the connecting sleeve (13) and the pipe pile (15) are connected and fixed by a gelling material.

3. The emergency power supply system based on a multi-pod offshore wind turbine foundation according to claim 2 is characterized in that: The connecting sleeve (13) is provided with an exhaust port (131).

4. The emergency power supply system based on a multi-pod offshore wind turbine foundation according to claim 1 is characterized in that: The water pumping member (31) is electrically connected to the power supply device (22).

5. The emergency power supply system based on a multi-pod offshore wind turbine foundation according to claim 1 is characterized in that: A hole (35) is provided at the bottom of the pipe pile (15), and the hole (35) is communicated with the pipe pile (15).

6. The emergency power supply system based on a multi-pod offshore wind turbine foundation according to claim 1, characterized in that: The bottom end of the pipe pile (15) is provided with a water-proof bottom seal (151).

7. The emergency power supply system based on a multi-pod offshore wind turbine foundation according to claim 1 is characterized in that: It also includes an operation and maintenance channel (4) arranged in the central axis cylinder (11).

8. The emergency power supply system based on a multi-pod offshore wind turbine foundation according to any one of claims 1 to 7, characterized in that: It also includes auxiliary facilities arranged on the wind turbine basic assembly.

Images