Jacket floating type fan foundation capable of automatically rectifying inclination

Abstract

The invention provides an automatic rectification jacket floating type fan foundation, and relates to the technical field of offshore wind power, the automatic rectification jacket floating type fan foundation comprises a jacket, an automatic rectification system is arranged at the bottom of the jacket, and the automatic rectification system comprises a first buoy, a second buoy, a third buoy and a fourth buoy which are arranged on the same horizontal plane and face four directions; water is preloaded in the first buoy, the second buoy, the third buoy and the fourth buoy, and the first buoy, the second buoy, the third buoy and the fourth buoy are connected through a water pipe and a water pump; the fan tower drum is fixedly mounted at the top end of the jacket; the anchor chain is connected with the bottom of the jacket and is fixed on the seabed; and the deviation rectifying sensor is arranged at the bottom of the fan tower drum and is electrically connected with the automatic deviation rectifying system. The inclination rectification sensor is arranged to sense the inclination direction of the draught fan, and water in the buoy is transferred to form a restoring torque surface to rectify the deviation of the draught fan foundation.

Description

Technical Field

[0001] The invention relates to the technical field of offshore wind power, in particular to an automatically tilt-correcting pipe frame floating wind turbine foundation. Background Art

[0002] With the large-scale commissioning of offshore wind power in my country, offshore resources are gradually becoming saturated, and offshore wind power is gradually moving towards the "deep blue". At the same time, the form of offshore wind power support structure also changes with the water depth, evolving from fixed support structure to floating support structure. Floating offshore wind power, as a technology that can develop deeper and farther offshore wind resources, helps to expand the scope of utilization of offshore wind resources, break through the limitations of water depth on column-type offshore wind power construction, and can also effectively reduce the negative impact of construction on the marine environment.

[0003] my country's current offshore wind power projects mainly use fixed foundations, which are usually installed in shallow sea areas with a water depth of less than 30 meters. With the increase of water depth, the construction and installation costs of fixed wind turbines increase significantly. When the water depth exceeds 50 to 60 meters, the construction cost of floating wind turbine systems will be significantly reduced. Therefore, in sea areas with a water depth of more than 50 meters, floating foundations are usually selected as the supporting structure of wind turbines. However, floating offshore wind power currently faces several problems: floating wind turbines have relatively poor stability and are prone to capsizing or collapse under extreme weather conditions; because the buoys are located near the water surface, they bear large wave loads and current loads, making it difficult to resist extreme waves and ocean currents, and unable to adapt to harsh environmental conditions; in addition, the distance between the buoys and the center of gravity of the structure is short, resulting in a small moment of buoyancy provided by the buoys to counteract overturning, thereby affecting the stability of the overall structure. Summary of the invention

[0004] The present invention provides a floating wind turbine foundation with an automatic tilt-correcting jacket, the purpose of which is to solve at least one technical problem existing in the prior art mentioned in the background technology.

[0005] The present invention provides the following technical solutions to achieve the above objectives:

[0006] An automatic tilt-correcting pipe frame floating wind turbine foundation, comprising:

[0007] The catheter frame is a lattice structure, and the cross-sectional area of ​​the catheter frame gradually decreases upward in the height direction;

[0008] An automatic deviation correction system, which is arranged at the bottom of the conductor frame, and includes four buoys, namely, buoy 1, buoy 2, buoy 3 and buoy 4, which are arranged in the same horizontal plane and face four directions. Buoy 1, buoy 2, buoy 3 and buoy 4 are pre-filled with water, and buoy 1, buoy 2, buoy 3 and buoy 4 are connected by water pipes and water pumps;

[0009] A fan tower, wherein the fan tower is fixedly mounted on the top of the pipe frame;

[0010] An anchor chain connected to the bottom of the jacket and fixed to the seabed;

[0011] The tilt correction sensor is arranged at the bottom of the wind turbine tower and is electrically connected to the automatic deviation correction system.

[0012] Furthermore, the amount of pre-filled water in the buoy 1, buoy 2, buoy 3 and buoy 4 is determined according to the extreme working condition, and the overturning moment M of the wind turbine subjected to the external load is calculated based on the extreme working condition. AE , then the pre-filled water volume V in buoy 1, buoy 2, buoy 3 and buoy 4 is determined by the following formula:

[0013] Where β is the design safety factor; L is the distance between the buoy and the centroid of the wind turbine foundation; [M] is the total overturning moment of the wind turbine foundation corresponding to the allowable tilt angle.

[0014] Furthermore, the height of the jacket is determined according to the peak and trough heights of the maximum wave height under extreme working conditions. The jacket height is equal to the maximum wave height once in 50 years in the sea area where the wind turbine is located plus a safety air gap of 1 meter.

[0015] Furthermore, the buoy one, buoy two, buoy three and buoy four are cross-connected through water pipes.

[0016] Furthermore, the wind turbine tower is connected to the conductor pipe frame through a transition section.

[0017] Furthermore, the conductor frame is in a quadrangular pyramid structure, and the four vertices of the bottom of the quadrangular pyramid are respectively provided with buoy 1, buoy 2, buoy 3 and buoy 4.

[0018] Furthermore, the tilt correction sensor comprises a conical bottom plate, a plurality of signal receivers are evenly spaced around the conical bottom plate, a signal ball is movably arranged inside the conical bottom plate, and the conical bottom plate is gradually concave from the periphery to the center.

[0019] Furthermore, the concave angle of the conical bottom plate is 0.5 degrees.

[0020] Furthermore, the signal receiver includes signal receiver one, signal receiver two, signal receiver three, signal receiver four, signal receiver five, signal receiver six, signal receiver seven and signal receiver eight, wherein the setting directions of signal receiver one, signal receiver three, signal receiver five and signal receiver seven are consistent with the setting directions of buoy one, buoy two, buoy three and buoy four.

[0021] An automatic deviation correction method for a floating wind turbine foundation with an automatic tilt correction jacket is characterized by comprising the following steps:

[0022] Step 1: When the wind turbine foundation is tilted by external force, the tilt sensor will tilt accordingly. When the tilt angle reaches or exceeds the maximum tilt angle allowed by the wind turbine, the tilt sensor is triggered.

[0023] Step 2: The tilt correction sensor then sends out a water transfer signal in the opposite direction of the tilt, transferring the water in the buoy in the tilt direction to the buoy in the opposite direction, thereby generating a restoring torque;

[0024] Step 3: Under the action of the restoring torque, the inclination angle of the fan foundation is restored to a safe range, the tilt correction sensor is disconnected, the water supply signal stops, the water supply process is terminated, and the automatic tilt correction process is completed.

[0025] Beneficial Effects

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The tilt sensor is set at the bottom of the wind turbine tower to sense the tilt direction of the wind turbine. The tilt sensor outputs a pumping signal to the tilted water pump. The water pump transfers the water in the buoy in the tilted direction to the buoy in the opposite direction of the tilt. The change of water volume in the buoy generates a restoring torque. The restoring torque increases linearly with the change of water volume. When M is satisfied, AE =M A -M B When ≤[M], the rolling ball of the automatic tilt correction sensor will return to the center of the conical bottom plate, automatically disconnecting the water supply signal, the water supply is terminated, and the tilt correction is completed.

[0028] For deep seas with large waves, the extreme wave height is often above 20m, and the height difference between the wave crest and the wave trough is more than 40m. The jacket has good rigidity and small force area. The jacket is set within the wave action range, the wave load is small, the overturning moment of the structure is reduced, and the influence of waves on the floating foundation is avoided, reducing the overturning moment of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the vertical structure of the floating wind turbine of the jacket frame of the present invention;

[0030] Figure 2 It is a schematic diagram of the top view of the structure of the jacket floating wind turbine of the present invention;

[0031] Figure 3 This is a schematic diagram of the automatic tilt correction control system of the present invention;

[0032] Figure 4 Schematic diagram of the internal structure of the automatic tilt correction sensor of the present invention (top view);

[0033] Figure 5 Schematic diagram of the internal structure of the automatic tilt correction sensor of the present invention (side view);

[0034] Figure 6 It is a flowchart of the automatic tilt correction of the present invention;

[0035] Figure markings: 1-buoy one; 2-buoy two; 3-buoy three; 4-buoy four; 5-pipe frame; 6-transition section; 7-wind turbine tower; 8-tilt correction sensor; 9-water pump signal wire; 10-signal control system; 11-water pump one; 12-water pump two; 13-water pump three; 14-water pump four; 15-water pipe; 16-anchor chain; 17-wave schematic line; 18-seabed; 801-signal receiver one; 802-signal receiver two; 803-signal receiver three; 804-signal receiver four; 805-signal receiver five; 806-signal receiver six; 807-signal receiver seven; 808-signal receiver eight; 809-signal ball; 810-conical bottom plate; 811-signal transmission line. DETAILED DESCRIPTION

[0036] To facilitate the understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the drawings show preferred embodiments of the present invention, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosed content of the present invention.

[0037] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0039] Embodiment. A floating wind turbine foundation with an automatic tilt correction jacket, the structure of which is referenced Figures 1 to 5 The conductor frame 5 is a lattice structure, and the cross-sectional area of ​​the conductor frame 5 is gradually reduced upward in the height direction; by adopting the conductor frame 5 with a lattice structure, the cross-sectional area is reduced, ensuring that the wave load and ocean current load are kept at a low level.

[0040] An automatic deviation correction system, which is arranged at the bottom of the conductor frame 5, and includes four buoys 1, 2, 3 and 4 arranged in the same horizontal plane and facing four directions, wherein the buoys 1, 2, 3 and 4 are pre-filled with water, and the buoys 1, 2, 3 and 4 are connected by water pipes and water pumps;

[0041] A wind turbine tower 7, wherein the wind turbine tower 7 is fixedly mounted on the top of the pipe frame 5;

[0042] An anchor chain 16, the anchor chain 16 is connected to the bottom of the jacket 5 and fixed on the seabed 18;

[0043] The tilt correction sensor 8 is arranged at the bottom of the wind turbine tower 7 and is electrically connected to the automatic correction system. The tilt correction sensor is arranged at the bottom of the wind turbine tower to sense the tilt direction of the wind turbine. The tilt correction sensor outputs a pumping signal to the tilted water pump. The water pump transfers the water in the buoy in the tilted direction to the buoy in the opposite direction of the tilt. The change in the amount of water in the buoy generates a restoring torque. The restoring torque increases linearly with the change in the amount of water. When the restoring torque is greater than or equal to the overturning torque, the rolling ball of the automatic tilt correction sensor returns to the center of the conical bottom plate, automatically disconnects the water transfer signal, and the water transfer is terminated, and the tilt correction is completed.

[0044] The wind turbine tower 7 is connected to the pipe frame 5 via a transition section 6 .

[0045] The pre-filled water volume in the buoy 1, buoy 2, buoy 3 and buoy 4 is determined according to the extreme working condition, and the overturning moment M of the wind turbine subjected to the external load is calculated based on the extreme working condition. AE , then the pre-filled water volume V in buoy 1, buoy 2, buoy 3, and buoy 4 is determined by the following formula:

[0046] Where β is the design safety factor; L is the distance between the buoy and the centroid of the wind turbine foundation; [M] is the total overturning moment of the wind turbine foundation corresponding to the allowable tilt angle;

[0047] The tilt of the wind turbine is caused by the overturning moment. When the total overturning moment of the wind turbine foundation does not exceed the overturning moment corresponding to the allowable inclination angle, the structure is safe. The relationship is as follows:

[0048] M AE =M A -M B ≤[M]

[0049] M B =2×ΔV×L

[0050] M AE ─Total overturning moment of wind turbine foundation;

[0051] M A ─The overturning moment of the fan under external load;

[0052] M B ─ Restoring torque caused by the change of water volume in the buoy;

[0053] [M]─Total overturning moment of the wind turbine foundation corresponding to the allowable tilt angle;

[0054] ΔV─ is the total change in water volume in the buoy on one side;

[0055] The height of the jacket 5 is determined according to the peak and trough heights of the maximum wave height under extreme working conditions, and the height of the jacket 5 is equal to the maximum wave height of the sea area where the wind turbine is located once in 50 years plus a safety air gap of 1 meter. By setting the height of the jacket 5 equal to the sum of the maximum wave height of the sea area where the wind turbine is located once in 50 years plus a safety air gap of 1 meter, it is ensured that when the wind turbine is installed in the sea area, the buoy is always below the waves, and the stability of the wind turbine foundation is maintained.

[0056] The conductor frame 5 is a quadrangular pyramid structure, and the four vertices at the bottom of the quadrangular pyramid are respectively provided with buoy 1, buoy 2, buoy 3, and buoy 4; the buoy 1, buoy 2, buoy 3, and buoy 4 are cross-connected by water pipes 15, and adjacent buoys are not connected by water pipes 15. The structure is referenced Figure 3 , buoy one 1 and buoy three 3 are connected by a pair of water pipes 15, and a water pump one 11 is provided in buoy one 1, and water pump one 11 pumps water from buoy one 1 into buoy three 3 through a water pipe 15; buoy three 3 is provided with a water pump three 13, and water pump three 13 pumps water from buoy three 3 into buoy one 1 through another water pipe 15; buoy two 2 and buoy four 4 are connected by another pair of water pipes 15, and buoy two 2 is provided with a water pump two 12, and water pump two 12 pumps water from buoy two 2 into buoy four 4 through a water pipe 15; buoy four 4 is provided with a water pump four 14, and water pump four 14 pumps water from buoy four 4 into buoy two 2 through another water pipe 15. By cross-arranging the water pipe 15 and cooperating with the water pump 1 11, the water pump 2 12, the water pump 3 13 and the water pump 4 14, it is ensured that when the fan capsizes, water is quickly pumped from the buoy into the relative buoy to ensure the generation of the restoring torque.

[0057] The tilt correction sensor 8 includes a conical bottom plate 810, and a plurality of signal receivers are evenly spaced around the conical bottom plate 810. A signal ball 809 is movably arranged inside the conical bottom plate 810. The conical bottom plate 810 is gradually concave from the periphery to the center; the concave angle of the concave bottom plate 810 is 0.5 degrees; the signal ball 809 is connected to the signal control system 10 through the signal conduction line 811 and the water pump signal wire 9, and the signal control system 10 is connected to water pump one 11, water pump two 12, water pump three 13 and water pump four 14.

[0058] The signal receiver includes signal receiver one 801, signal receiver two 802, signal receiver three 803, signal receiver four 804, signal receiver five 805, signal receiver six 806, signal receiver seven 807 and signal receiver eight 808, wherein the setting direction of signal receiver one 801, signal receiver three 803, signal receiver five 805 and signal receiver seven 807 is consistent with the setting direction of buoy one 1, buoy two 2, buoy three 3 and buoy four 4. By arranging the signal receiver 1 801, the signal receiver 2 802, the signal receiver 3 803, the signal receiver 4 804, the signal receiver 5 805, the signal receiver 6 806, the signal receiver 7 807 and the signal receiver 8 808 in the aforementioned manner, when the wind turbine overturns, the signal ball 809 of the tilt correction sensor 8 rolls synchronously with the wind turbine in the same direction until the tilt angle is greater than the maximum allowable tilt angle, and the signal ball 809 contacts the signal receiver in the corresponding direction. At this time, the signal ball 809 sends a pumping signal to the water pump in the direction, so that the water in the buoy is output in the opposite direction of the tilt direction, generating a restoring torque, and finally maintaining the balance of the wind turbine; for example, when the tilt angle of the wind turbine foundation in the direction of the signal receiver 1 801 is greater than the maximum allowable tilt angle, the signal ball 809 contacts the signal receiver in the corresponding direction, and then ... generating a restoring torque, and finally maintaining the balance of the wind turbine; for example, when the tilt angle of the wind turbine foundation in the direction of the signal receiver 1 801 is greater than the maximum allowable tilt angle, the signal ball 809 contacts the signal receiver in the corresponding direction, and then When the maximum allowable inclination angle is reached or exceeded, the signal ball 809 will roll toward the signal receiver 801 and contact the signal receiver 801. When the signal control system 10 receives the signal from the signal receiver 801, it will control the water pump 11. The water pump 11 will pump the water from the float 1 to the float 3, so that the buoyancy of the float 1 increases and the buoyancy of the float 3 decreases. The buoyancy change value will generate a restoring moment. The restoring moment is opposite to the overturning moment of the fan under the external load, so that the total overturning moment of the fan foundation is reduced, and the inclination angle of the fan is also reduced. When the pumping process is corrected to within the maximum allowable inclination angle, the signal ball 809 will return to the center of the conical bottom plate 810, the tilt correction sensor 8 is disconnected, the water supply is terminated, and the automatic tilt correction is completed.

[0059] When the inclination angle of the wind turbine foundation toward the signal receiver 2 802 reaches or exceeds the maximum allowable inclination angle, the signal ball 809 will roll toward the signal receiver 2 802 and contact the signal receiver 2 802. When the signal control system 10 receives the signal receiver 2 802, it will control the water pump 1 11 and the water pump 2 12. The water pump 1 11 pumps the water in the buoy 1 1 into the buoy 3 3, and the water pump 12 pumps the water in the buoy 2 2 into the buoy 4 4, so that the buoys 1 1 and 2 2 are in a stable state. The force increases, the buoyancy of buoy three 3 and buoy four 4 decreases, and the buoyancy change value will generate a restoring torque. The restoring torque is opposite to the overturning moment of the fan subjected to the external load, so that the total overturning moment of the fan foundation is reduced, and the inclination angle of the fan is also reduced accordingly. When the pumping process is corrected to within the maximum allowable inclination angle, the signal ball 809 will return to the center of the conical bottom plate 810, the tilt correction sensor 8 is disconnected, the water supply is terminated, and the automatic tilt correction is completed; the tilt correction principles in other directions are the same as the above case.

[0060] An automatic correction method for the foundation of a floating wind turbine with an automatic correction jacket, the process is referenced Figure 6 , including the following steps:

[0061] Step 1: When the wind turbine foundation is tilted by external force, the tilt correction sensor (8) will tilt accordingly. At this time, the signal ball will roll outward. Once the tilt angle reaches or exceeds the maximum tilt angle allowed by the wind turbine, that is, 0.5 degrees, the signal ball will trigger the tilt correction sensor.

[0062] Step 2: The tilt correction sensor then sends out a water transfer signal in the opposite direction of the tilt, transferring the water in the buoy in the tilt direction to the buoy in the opposite direction, thereby generating a restoring torque;

[0063] Step 3: Under the action of the restoring torque, the inclination angle of the fan foundation can be restored to a safe range; at this time, the signal ball will return to the center position of the conical bottom plate, the tilt correction sensor will be disconnected, the water supply signal will stop, the water supply process will terminate, and the automatic tilt correction process will be completed.

[0064] Obviously, the above is only a part of the embodiments of the present invention, not all of the embodiments. The above embodiments are not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and variations. Any combination, modification, equivalent replacement, improvement and all other embodiments that can be made by those of ordinary skill in the art within the spirit and principle of the present invention should be within the protection scope of the present invention.

Claims

1. A floating wind turbine foundation with an automatic tilt correction jacket, characterized in that: include: The catheter frame (5) is a lattice structure, and the catheter frame (5) is arranged with a cross-sectional area gradually decreasing upward along the height direction; An automatic deviation correction system is arranged at the bottom of a conductor frame (5), and comprises four buoys, namely, buoy 1 (1), buoy 2 (2), buoy 3 (3) and buoy 4 (4), which are arranged on the same horizontal plane and facing four directions. Buoy 1 (1), buoy 2 (2), buoy 3 (3) and buoy 4 (4) are pre-filled with water, and buoy 1 (1), buoy 2 (2), buoy 3 (3) and buoy 4 (4) are connected by a water pipe (15). A water pump is arranged at the connection end between the water pipe (15) and the buoy, and the water pump is connected to a signal control system (10); A fan tower (7), wherein the fan tower (7) is fixedly mounted on the top of the pipe frame (5); An anchor chain (16), the anchor chain (16) being connected to the bottom of the jacket (5) and fixed on the seabed (18); A tilt correction sensor (8), wherein the tilt correction sensor (8) is arranged at the bottom of the wind turbine tower (7) and is electrically connected to the automatic deviation correction system.

2. The automatic tilt-correcting jacket floating wind turbine foundation according to claim 1 is characterized in that: The pre-filled water volume in the buoy 1 (1), buoy 2 (2), buoy 3 (3) and buoy 4 (4) is determined according to the extreme working condition, and the overturning moment M of the wind turbine subjected to the external load is calculated based on the extreme working condition. AE , then the pre-filled water volume V in buoy 1 (1), buoy 2 (2), buoy 3 (3) and buoy 4 (4) is determined by the following formula: Where β is the design safety factor; L is the distance between the buoy and the centroid of the wind turbine foundation; [M] is the total overturning moment of the wind turbine foundation corresponding to the allowable tilt angle.

3. The automatic tilt-correcting jacket floating wind turbine foundation according to claim 1 is characterized in that: The height of the conductor frame (5) is determined according to the wave crest and wave trough heights of the maximum wave height under extreme working conditions. The height of the conductor frame (5) is equal to the maximum wave height of the sea area where the wind turbine is located once in 50 years plus a safety air gap of 1 meter.

4. The automatic tilt-correcting jacket floating wind turbine foundation according to claim 1 is characterized in that: The buoy one (1), the buoy two (2), the buoy three (3) and the buoy four (4) are cross-connected via a water pipe (15).

5. The automatic tilt-correcting jacket floating wind turbine foundation according to claim 1 is characterized in that: The wind turbine tower (7) is connected to the conductor pipe frame (5) via a transition section (6).

6. The automatic tilt-correcting jacket floating wind turbine foundation according to claim 1 is characterized in that: The conductor frame (5) is in the form of a quadrangular pyramid structure, and the four vertices at the bottom of the quadrangular pyramid are respectively provided with a buoy one (1), a buoy two (2), a buoy three (3) and a buoy four (4).

7. The automatic tilt-correcting jacket floating wind turbine foundation according to claim 1 is characterized in that: The tilt correction sensor (8) comprises a conical bottom plate (810), a plurality of signal receivers are evenly spaced around the conical bottom plate (810), a signal ball (809) is movably arranged inside the conical bottom plate (810), and the conical bottom plate (810) is gradually concave from the periphery to the center.

8. The automatic tilt-correcting jacket floating wind turbine foundation according to claim 7 is characterized in that: The concave angle of the conical bottom plate (810) is 0.5 degrees.

9. The automatic tilt-correcting jacket floating wind turbine foundation according to claim 7 is characterized in that: The signal receiver includes a signal receiver one (801), a signal receiver two (802), a signal receiver three (803), a signal receiver four (804), a signal receiver five (805), a signal receiver six (806), a signal receiver seven (807) and a signal receiver eight (808), wherein the arrangement direction of the signal receiver one (801), the signal receiver three (803), the signal receiver five (805) and the signal receiver seven (807) is consistent with the arrangement direction of the buoy one (1), the buoy two (2), the buoy three (3) and the buoy four (4).

10. The automatic deviation correction method of the automatically tilt-correcting jacket floating wind turbine foundation according to claim 1, characterized in that: The following steps are involved: Step 1: When the wind turbine foundation is tilted by external force, the tilt correction sensor (8) will tilt accordingly. When the tilt angle reaches or exceeds the maximum tilt angle allowed by the wind turbine, the tilt correction sensor is triggered. Step 2: The tilt correction sensor then sends out a water transfer signal in the opposite direction of the tilt, transferring the water in the buoy in the tilt direction to the buoy in the opposite direction, thereby generating a restoring torque; Step 3: Under the action of the restoring torque, the inclination angle of the fan foundation is restored to a safe range, the tilt correction sensor is disconnected, the water supply signal stops, the water supply process is terminated, and the automatic tilt correction process is completed.

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