Multi-mode and dynamic stable integrated floating device and high-altitude wind power system

Abstract

The invention relates to a multi-mode and dynamic stability integrated floating device and a high-altitude wind power system. The floating device comprises a floating balloon, a shirt, a main mooring rope and a plurality of side hanging mooring ropes. The floating air ball is filled with air with the density smaller than that of air. A hole is formed in the central area of the shirt, and the floating balloon is connected with the shirt at the hole. The upper end of the main cable is connected with the floating air ball, and the lower end is used for being connected with air wind catching equipment. The upper ends of a plurality of side hanging mooring ropes are connected to the edge area, away from the floating balloon, of the shirt respectively and distributed in the circumferential direction of the shirt at intervals, and the lower ends of the side hanging mooring ropes are connected with the main mooring rope respectively; the jersey is configured to droop when in a lift-off mode, to unfold when in a working mode, and to turn up when in a recovery mode. The high-altitude wind power generation system comprises a floating device. According to the floating device, the reliability and the safety in each mode can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of wind power generation, and in particular, to a multi-modal and dynamic stability integrated floating device and a high-altitude wind power system. Background Art

[0002] As a clean and renewable energy source, wind energy has become an important part of the global energy transformation. Wind power generation technology has made remarkable progress in the past few decades, especially in onshore and offshore wind power systems, which have been widely used. However, due to the instability of near-surface wind speeds, onshore and offshore wind power systems are also restricted, and subsequently, high-altitude wind power technology emerged.

[0003] High-altitude wind power technology also faces difficulties and challenges. Taking the umbrella-ladder type land-based high-altitude wind power system as an example, the system includes a floating device, an air wind-catching device, and a ground generator. The floating device can capture the wind energy in the air. The air wind-catching device is connected to the floating device and the ground generator. The floating device drags the air wind-catching device and then can drag the cable of the ground generator to realize the conversion of wind energy to mechanical energy and then to electrical energy.

[0004] The system undergoes three processes: ascent, operation, and recovery. During the ascent process, it is a fundamental problem for the floating device to safely and reliably lift the air wind-catching device into the air. During the operation process of capturing wind energy, when encountering extreme working conditions such as sudden wind speed changes or drops, ensuring the dynamic stability of the system is another problem. During the recovery process, if there is a lack of continuous aerodynamic resistance or buoyancy compensation, the system may become unstable and fall, causing unpredictable dangers and losses. Summary of the Invention

[0005] The present application provides a multi-modal and dynamic stability integrated floating device and a high-altitude wind power system, which can improve the reliability and safety in each mode.

[0006] A floating device includes:

[0007] A floating balloon filled with a gas having a density less than that of air inside;

[0008] A jersey with a hole provided in the central area thereof, and the floating balloon is connected to the jersey at the hole;

[0009] A main cable, the upper end of which is connected to the floating balloon, and the lower end of which is used to be connected to an air wind-catching device;

[0010] Multiple side-hanging cables, the upper ends of the multiple side-hanging cables are respectively connected to the edge area of the jersey away from the floating balloon, and are spaced apart in the circumferential direction of the jersey, and the lower ends of the multiple side-hanging cables are respectively connected to the main cable, wherein the jersey is configured to droop when in the ascending mode, unfold when in the working operation mode, and flip up when in the recovery mode.

[0011] Optionally, the floating balloon includes a main airbag and an additional airbag communicated with the main airbag. The main airbag is connected to the jersey at the hole, the additional airbag protrudes towards the periphery of the main airbag, and is connected to the jersey.

[0012] Optionally, the additional airbag extends from the main airbag to the edge of the jersey.

[0013] Optionally, there are multiple additional airbags, and the multiple additional airbags are spaced apart in the circumferential direction of the main airbag and are all connected to the jersey.

[0014] Optionally, the additional airbag includes an upper side sub-airbag and / or a lower side sub-airbag. The upper side sub-airbag is communicated with the main airbag and is connected to the upper surface of the jersey, and the lower side sub-airbag is communicated with the main airbag and is connected to the lower surface of the jersey.

[0015] Optionally, the jersey is also provided with air guiding holes penetrating along its own thickness direction.

[0016] Optionally, there are multiple air guiding holes, and the multiple air guiding holes are arranged in the central area of the jersey close to the floating balloon and are spaced apart in the circumferential direction of the floating balloon.

[0017] Optionally, the floating device further includes an upper limiter fixed to the upper end of the main cable, a lower limiter fixed to the lower end of the main cable, and a sliding locking device that can move along the main cable. The sliding locking device is controlled to move between the upper limiter and the lower limiter, and tighten or release the multiple side-hanging cables.

[0018] Optionally, when the jersey is fully unfolded, it is in a hemispherical shape, and the lower end is circular. The radius of the circle is set to be 2 to 2.5 times the radius of the floating balloon at the connection with the jersey.

[0019] An airborne wind power generation system, comprising:

[0020] A generator, including a rotor;

[0021] An airborne wind-catching device; and

[0022] The floating device as described in any one of the above, the airborne wind-catching device connects the floating device and the rotor. Brief Description of the Drawings

[0023] Figure 1 FIG. is a schematic diagram of the integrated multi-modal and dynamic stability floating device shown in an exemplary embodiment of the present application in the lifting mode;

[0024] Figure 2 is Figure 1 a schematic diagram of the integrated multi-modal and dynamic stability floating device shown in [reference] in the working operation mode;

[0025] Figure 3 is Figure 1 a schematic diagram of the integrated multi-modal and dynamic stability floating device shown in [reference] in the recovery mode. Detailed Description of the Embodiments

[0026] Here, the technical solutions in the embodiments (or "embodiment modes") of the present application will be clearly and completely described in conjunction with the accompanying drawings. When the following description involves the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0027] If there are terms related to directional indications or positional relationships in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, lateral, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), then such terms are only used to explain the relative positional relationships and movement conditions between components in a specific posture (as shown in the accompanying drawings); if the specific posture changes, then the directional indication or positional relationship also changes accordingly. In addition, the terms "first", "second", etc. involved in the embodiments of the present application are only for the purpose of convenient description and cannot be understood as indicating or implying relative importance.

[0028] Please refer to Figures 1 to 3 , Figure 1 which is a schematic diagram of the integrated multi-modal and dynamic stability floating device 100 shown in an exemplary embodiment of the present application in the lifting mode. Figure 2 is Figure 1 a schematic diagram of the floating device 100 shown in [reference] in the working operation mode. Figure 3 is Figure 1 a schematic diagram of the floating device 100 shown in [reference] in the recovery mode.

[0029] The present application provides a multi-modal and dynamic stability integrated floating device 100 (hereinafter referred to as the floating device 100). The floating device 100 includes a floating balloon 10, a jersey 20, a main cable 30, and multiple side hanging cables 40. The floating balloon 10 can be made of elastic or flexible materials and is filled with a gas having a density less than that of air, such as helium or a mixed gas. A hole is provided in the central region of the jersey 20, and the floating balloon 10 is connected to the jersey 20 at the hole. For example, the floating balloon 10 and the jersey 20 can be connected by a hot pressing composite process to closely connect the two into an integrated structure, reducing the risk of detachment under extreme environmental conditions. The jersey 20 can be configured as an annular jersey having a circular hole and a circular outer contour, but is not limited thereto.

[0030] The upper end of the main cable 30 is connected to the floating balloon 10, specifically, it can be connected to the lowermost end of the floating balloon 10. The lower end of the main cable 30 is used to connect to an air wind-catching device. The upper ends of the multiple side hanging cables 40 are respectively connected to the edge region of the jersey 20 away from the floating balloon 10 and are spaced apart in the circumferential direction of the jersey 20. The lower ends of the multiple side hanging cables 40 are respectively connected to the main cable 30. The specific number of the side hanging cables 40 can be determined according to the size of the jersey 20. The floating device 100 has different modes. The jersey 20 is configured to droop when in the liftoff mode, expand when in the working operation mode, and flip up when in the recovery mode.

[0031] According to the above description, during the initial liftoff process, the floating device 100 can move upward by the buoyancy of the floating balloon 10. At this time, the jersey 20 droops (refer to Figure 1 ), and the jersey 20 adheres to the lower side surface of the floating balloon 10, without hindering the ascent of the floating device 100, enabling the floating device 100 to lift off reliably. When the floating device 100 rises to the target height, the jersey 20 can expand under the action of wind (refer to Figure 2 ). At this time, the air resistance and the buoyancy act together to keep the floating device 100 in the working operation mode. For example, for the floating device 100 applied to a high-altitude wind power generation system, the floating device 100 can continuously capture wind energy in the working operation mode, convert the wind energy into mechanical energy and then into electrical energy. It should be noted that the expansion angle of the jersey 20 changes according to the current wind force at any time. During the recovery process, the floating device 100 can move downward under the action of an external force. At this time, by using the resistance provided when the jersey expands and the buoyancy of the floating balloon 10 acting together, the rapid fall of the floating device 100 can be avoided, ensuring the stability and safety during the recovery stage. The jersey 20 can be controlled to gradually convert from the expanded state to the flipped-up state (refer to Figure 3 ). After flipping up, the jersey 20 can adhere to the upper side surface of the floating balloon 10, keeping the floating device 100 at a certain height. The flipping up of the jersey 20 can reduce energy consumption and prepare for the next liftoff.

[0032] In one embodiment, the floating balloon 10 includes a main airbag 11 and an additional airbag 12 communicated with the main airbag 11. The main airbag 11 is connected to the jersey 20 at the hole, and the additional airbag 12 protrudes towards the periphery of the main airbag 11 and is connected to the jersey 20. With such a setting, the additional airbag 12 can increase the volume of the floating balloon 10, so as to be used to compensate the lifting buoyancy. On the other hand, the additional airbag 12 in the inflated state has a certain strength and can also provide assistance for the initial deployment of the jersey 20.

[0033] In a specific embodiment, the additional airbag 12 extends from the main airbag 11 to the edge of the jersey 20. That is to say, the size of the additional airbag 12 protruding from the main airbag 11 is approximately equal to the radial size of the jersey 20. In this way, the additional airbag 12 can better provide assistance for the deployment of the jersey 20 and at the same time enable the jersey 20 to be deployed more fully.

[0034] In Figure 2 In the illustrated embodiment, a plurality of additional airbags 12 are provided. The plurality of additional airbags 12 are spaced apart in the circumferential direction of the main airbag 11 and are all connected to the jersey 20, so that the forces on each part of the jersey 20 in the circumferential direction are relatively uniform. Moreover, the plurality of additional airbags 12 and the jersey 20 together form an umbrella-like structure, and the plurality of additional airbags 12 form flexible umbrella ribs of the jersey 20, which is more conducive to the full deployment of the jersey 20 and maintaining the fully deployed state. When encountering extreme working conditions such as sudden changes or drops in wind speed, the dynamic stability of the floating device 100 can still be ensured, and the risk of attitude instability can be reduced.

[0035] It should be noted that the present application does not specifically limit the number of the additional airbags 12. The plurality of additional airbags 12 can be configured to be arranged at uniform intervals in the circumferential direction of the jersey 20.

[0036] In an alternative embodiment, the additional airbag 12 includes an upper-side sub-airbag and / or a lower-side sub-airbag. The upper-side sub-airbag is communicated with the main airbag 11 and is connected to the upper surface of the jersey 20, and the lower-side sub-airbag is communicated with the main airbag 11 and is connected to the lower surface of the jersey 20. For example, the upper-side sub-airbag or the lower-side sub-airbag can be set separately according to actual needs, or the upper-side sub-airbag and the lower-side sub-airbag can be set at the same time. Configuring the upper-side sub-airbag and the lower-side sub-airbag at the same time can further increase the volume of the floating balloon 10 and further improve the lifting buoyancy and the reliability during operation. The upper-side sub-airbag and the lower-side sub-airbag can be arranged opposite to each other on the upper and lower sides of the jersey 20.

[0037] The floating balloon 10 can adopt a multi-layer composite film structure. The inner layer is an anti-leakage airtight layer, which can be made of organic polymer materials such as polyimide, etc. The middle layer is a stress-enhancing layer, which can be made of organic polymer materials such as aramid, etc. The outer layer is an anti-aging and ultraviolet coating of fluoropolymer. The size of the floating balloon 10 can be designed according to the weight of the air-catching device of the power generation system, and the present application does not make specific limitations on this.

[0038] Please continue to refer to Figure 2 ,the jersey 20 is also provided with air guiding holes 21 penetrating through its own thickness direction. When the air flow flows on the surface of the jersey 20, the speed of the air flow will change greatly due to the curved surface of the jersey 20. When the wind speeds on the upper and lower sides of the jersey 20 are inconsistent, it will cause the pressures on the upper and lower sides of the jersey 20 to be inconsistent, thus causing the jersey 20 to deform or even be damaged. The setting of the air guiding holes 21 can improve the air flow circulation, enabling the air flow to flow from the lower side of the jersey 20 to the upper side of the jersey 20, or from the upper side of the jersey 20 to the lower side of the jersey 20, so as to adjust the pressure difference between the upper and lower sides of the jersey 20. With such a setting, although the aerodynamic resistance is weakened to a certain extent, it can reduce the damage of the air flow to the jersey 20 and also reduce the operation risk brought by the structural swing. The air guiding holes 21 can be set as circular holes to avoid stress concentration, but it is not limited to this.

[0039] In Figure 2 In the shown embodiment, there are a plurality of the air guiding holes 21, and the plurality of air guiding holes 21 are arranged in the central area of the jersey 20 close to the floating balloon 10 and are spaced apart in the circumferential direction of the floating balloon 10. That is to say, each air guiding hole 21 is closer to the floating balloon 10, which can reduce the overturning moment formed by the aerodynamic force generated when the air flow passes through the air guiding hole 21 on the floating device 100. In addition, the plurality of air guiding holes 21 can provide multiple channels for the up and down flow of the air flow, making the air flow distribution more uniform, and also enabling the overturning moments formed by the aerodynamic forces at each air guiding hole 21 on the floating device 100 to cancel each other out.

[0040] In Figure 2 In the shown embodiment, there is an air guiding hole 21 between every two adjacent additional air bags 12, which enables the additional air bags 12 to increase the stiffness of the jersey 20 at the air guiding holes 21 and enhance the ability of the jersey 20 to resist deformation at the air guiding holes 21.

[0041] The jersey 20 can be prepared from composite materials, for example, it can be made of lightweight and high-strength composite materials. The jersey 20 is thermally pressed and compounded with the joint surface of the floating balloon 10 at 360° at the holes. The air guiding holes 21 can be processed by laser cutting technology. A number of side hanging cable connection holes can also be provided at the edge of the jersey 20, and the side hanging cables 40 are respectively connected in the side hanging cable connection holes to ensure the reliability of the connection.

[0042] In one embodiment, the jersey 20 is hemispherical when fully unfolded, and the lower end is circular, and the radius of the circle is set to 2 to 2.5 times the radius of the floating balloon 10 at the connection with the jersey 20. This can make the size of the jersey 20 match the size of the floating balloon 10, ensuring better coordination in each mode. The "radius of the floating balloon 10 at the connection with the jersey 20" here refers to the radius of the floating balloon 10 after it is filled with gas, and is the radius of the connection with the jersey 20.

[0043] In one embodiment, Figure 2 As shown, a plurality of side hanging cables 40 can be fixed to the main cable 30 by a fixing device 50. In this scheme, the length of the plurality of side hanging cables 40 can be increased to achieve smooth unfolding and flipping of the jersey 20.

[0044] In another embodiment, Figure 3 As shown, the floating device 100 also includes an upper stopper 60 fixed to the upper end of the main cable 30, a lower stopper 70 fixed to the lower end of the main cable 30, and a sliding lock 80 movable along the main cable 30. The sliding lock 80 is controlled to move between the upper stopper 60 and the lower stopper 70 to tighten or release the multiple side-hanging cables 40. When the sliding lock 80 moves to the upper stopper 60, each side-hanging cable 40 is relaxed, and when the sliding lock 80 moves to the lower stopper 70, each side-hanging cable 40 is tightened, so that the jersey 20 can be smoothly unfolded and turned up.

[0045] Exemplarily, the sliding locker 80 is also configured to have a long-distance wireless communication function, and is equipped with a signal receiving unit, an autonomous power supply unit, a driving unit, and an engagement unit. The signal receiving unit can receive a remote control instruction to control the driving unit to drive the engagement unit to move. The engagement unit can be a gear rack engagement unit. For example, the main cable 30 is provided with a rack, and the sliding locker 80 includes a gear. The driving unit drives the gear to rotate and engage with the rack for transmission, so that the sliding locker 80 can move along the main cable 30. Of course, the implementation of the engagement unit is not limited to this.

[0046] The floating device 100 can change its own mode according to the stage it is in. The three basic modes are: lift mode (buoyancy compensation mode), recovery mode (aerodynamic balance mode) and working mode (deceleration balance mode). Different modes can be switched depending on wind speed conditions and the sliding lock 80.

[0047] When the floating device 100 initially ascends, its moving direction is upward. At this time, the floating device 100 is in the buoyancy compensation mode. The jersey 20 droops under the action of wind force and is in the closed state. The jersey 20 adheres to the lower surface of the floating balloon 10. The buoyancy generated by the floating balloon 10 lifts the air-catching device of the high-altitude wind power generation system to the target height. At this time, the floating device 100 is switched to the deceleration balance mode for power generation. During recovery, the floating device 100 moves downward. A remote control instruction is sent through the ground system to move the sliding lock 80 to the middle of the upper limiter 60 and the lower limiter 70. The side hanging cables 40 on each side are relaxed. The jersey 20 unfolds under the action of wind force and is switched to the deceleration balance mode. When the floating device 100 descends to the target height, in order to reduce energy consumption, a remote control instruction is sent through the ground system to move the sliding lock 80 to the upper limiter 60. At this time, the floating device 100 is switched to the pneumatic balance mode.

[0048] This application also provides a high-altitude wind power generation system, which includes a generator, an air-catching device (not shown), and the floating device 100 described above. The generator is fixed on the ground and includes a rotor. The air-catching device is connected to the main cable 30 of the floating device 100 and is also connected to the rotor of the generator. The air-catching device may include a working parachute, and the wind captured by the working parachute can drive the rotor of the generator to rotate.

[0049] The above are only the preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this application shall be included within the scope of protection of this application.

Claims

1. A multi-modal and dynamically stable integrated floating device, characterized in that, Comprising: A floating balloon filled with a gas having a density less than that of air inside; A jersey, a hole is provided in the central area of the jersey, and the floating balloon is connected to the jersey at the hole; A main cable, the upper end of which is connected to the floating balloon, and the lower end of which is used to be connected to an air wind-catching device; A plurality of side-hanging cables, the upper ends of the plurality of side-hanging cables are respectively connected to the edge area of the jersey away from the floating balloon and are spaced apart in the circumferential direction of the jersey, and the lower ends of the plurality of side-hanging cables are respectively connected to the main cable. Wherein, the jersey is configured to droop when in the ascending mode, unfold when in the working operation mode, and turn up when in the recovery mode.

2. The multi-modal and dynamic stability integrated floating device according to claim 1, characterized in that, The floating balloon includes a main airbag and an additional airbag communicated with the main airbag. The main airbag is connected to the jersey at the hole. The additional airbag protrudes towards the periphery of the main airbag and is connected to the jersey.

3. The multi-modal and dynamically stable integrated floating device according to claim 2, characterized in that, The additional airbag extends from the main airbag to the edge of the jersey.

4. The multimodal and dynamically stable integrated floating device according to claim 3, wherein, There are a plurality of the additional airbags, and the plurality of additional airbags are spaced apart in the circumferential direction of the main airbag and are all connected to the jersey.

5. The integrated multimodal and dynamically stable floating device according to any one of claims 2 to 4, characterized in that The additional airbag includes an upper side sub-airbag and / or a lower side sub-airbag. The upper side sub-airbag is communicated with the main airbag and is connected to the upper surface of the jersey. The lower side sub-airbag is communicated with the main airbag and is connected to the lower surface of the jersey.

6. The multi-modal and dynamic stability integrated floating device according to any one of claims 1 to 4, characterized in that The jersey is also provided with air guiding holes penetrating in its own thickness direction.

7. The multimodal and dynamically stable integrated floating device according to claim 6, characterized in that, There are a plurality of the air guiding holes, and the plurality of air guiding holes are arranged at the central area of the jersey close to the floating balloon and are spaced apart in the circumferential direction of the floating balloon.

8. The multimodal and dynamically stable integrated floating device according to claim 1, characterized in that The floating device further includes an upper limiter fixed to the upper end of the main cable, a lower limiter fixed to the lower end of the main cable, and a sliding locking device that can move along the main cable. The sliding locking device is controlled to move between the upper limiter and the lower limiter to tighten or release the plurality of side-hanging cables.

9. The multimodal and dynamically stable integrated floating device according to any one of claims 1 to 4, characterized in that, When the jersey is fully unfolded, it is in a hemispherical shape and the lower end is circular. The radius of the circle is set to be 2 to 2.5 times the radius of the floating balloon at the connection with the jersey.

10. A high-altitude wind power generation system, characterized in that, Comprising: A generator including a rotor; An air wind-catching device; And The multi-modal and dynamic stability integrated floating device according to any one of claims 1 to 9, wherein the air wind-catching device connects the floating device and the rotor.

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