Aerostat, wind power generation system and control method with built-in pressure regulating structure

Abstract

The present invention discloses an airship with a built-in pressure regulation structure, a wind power generation system, and a control method. In one embodiment, the airship includes an auxiliary airbag, a pressure regulation structure disposed inside the auxiliary airbag, and a pressure control structure disposed outside the auxiliary airbag. The pressure regulation structure includes an air duct, a first valve disposed at one end of the air duct, a second valve disposed at the other end of the air duct, and a blower disposed in the air duct between the first and second valves. The pressure control structure includes a controller and a pressure differential sensor. The controller is configured to control the blower, the first valve, and the second valve to exhaust or inflate the auxiliary airbag based on the air pressure of the airbag sensed by the pressure differential sensor. The embodiments provided by the present invention have the advantages of a compact structure and good airtightness by integrally disposing the pressure regulation structure of the airship inside the auxiliary airbag. This significantly improves the stability and reliability of the airship and has practical application value.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to an aerostat with a built-in pressure regulating structure, a wind power generation system and a control method. Background Art

[0002] The high-altitude wind power generation system brings wind turbines to an altitude of 500m to 10,000m through a floating platform. It takes advantage of the high-altitude wind energy, high wind speed, large power generation capacity, and stable output power. It is a wind power generation product with broad application prospects.

[0003] The pressure regulating device for the floating platform of a high-altitude wind turbine system consists of a fan assembly and a valve. The fan assembly consists of a fan, a check valve, and a flange. During installation, holes are drilled in the corresponding locations of the bladder, and the fan and valve assemblies are mounted on the bladder via flange connections. This presents the following problems:

[0004] 1. The problem of fan flow and static pressure loss: The fan assembly uses a one-way valve. When the one-way valve is not started, it is sealed by spring force. After the fan is started, the airflow will open the one-way valve cover and inflate the airbag. The airflow needs to overcome the elastic force of the one-way valve, resulting in the loss of fan static pressure and flow.

[0005] 2. The pressure regulating device has poor sealing and rapid leakage, and is unable to adapt to the problem of high-pressure ring wing pressure regulation. In order to reduce the loss of static pressure and flow of the fan, the spring force of the one-way valve cannot be set too high, resulting in poor sealing performance of the one-way valve. Under high-pressure conditions, the gas leakage is too fast. It is only suitable for bladders with a pressure within 1000Pa and cannot be used for bladder pressure regulation exceeding 1000Pa.

[0006] 3. Split structure, inconvenient installation: The fan assembly and valve assembly are independent structures, and the flange and the bladder are connected. Two flanges need to be installed separately during assembly, which makes the installation more complicated.

[0007] 4. There is no dehumidification structure, and the condensed water accumulated in the bladder cannot be discharged automatically. It needs to be manually discharged after retrieving the anchor, which is a complicated operation. Summary of the Invention

[0008] In order to solve at least one of the above problems, the first embodiment of the present invention provides an aerostat based on a built-in pressure regulating structure, comprising an auxiliary airbag, a pressure regulating structure arranged inside the auxiliary airbag, and a pressure control structure arranged outside the auxiliary airbag, wherein:

[0009] The pressure regulating structure includes an air duct, a first valve provided at one end of the air duct, a second valve provided at the other end of the air duct, and a fan provided in the air duct between the first valve and the second valve;

[0010] The pressure control structure includes a controller and a pressure differential sensor. The controller is used to control the blower, the first valve and the second valve to exhaust or inflate the auxiliary airbag according to the air pressure of the airbag sensed by the pressure differential sensor.

[0011] For example, in the aerostat provided in some embodiments of the present application, the pressure regulating structure further includes a valve motor, a reduction gear, a valve connecting rod, a first bevel gear and a second bevel gear arranged outside the air duct, wherein

[0012] The valve connecting rod comprises a first end and a second end, the first end of the valve connecting rod drives the first valve via the first bevel gear, and the second end of the valve connecting rod drives the second valve via the second bevel gear;

[0013] The valve motor drives the valve connecting rod through the reduction gear box.

[0014] For example, in the aerostat provided in some embodiments of the present application, the pressure regulating structure further includes a first valve driving device and a second valve driving device arranged outside the air duct, wherein

[0015] The first valve driving device includes a first valve motor that drives the first valve;

[0016] The second valve driving device includes a second valve motor for driving the second valve.

[0017] For example, in some embodiments of the present application, the aerostat includes the first valve, the air duct, and the fan forming a first cavity. The aerostat further includes a first drying chamber disposed on a wall of the air duct of the first cavity. The first drying chamber includes a first desiccant, a first heating film, and a first drying valve cover covering the first drying chamber.

[0018] The second valve, the air duct and the fan form a second cavity, the aerostat further comprising a second drying chamber disposed on a tube wall of the air duct of the second cavity, the second drying chamber comprising a second desiccant, a second heating film, and a second drying valve cover covering the second drying chamber;

[0019] The aerostat further includes a drying push rod disposed outside the air duct, and a drying connecting rod respectively connecting the first drying valve cover and the second drying valve cover, wherein the drying push rod drives the first drying valve cover and the second drying valve cover through the drying connecting rod.

[0020] For example, in the aerostat provided in some embodiments of the present application, the auxiliary airbag includes a plurality of sub-airbags;

[0021] The pressure control structure includes sub-control structures corresponding to each sub-airbag, and each sub-control structure is arranged at the bottom of the corresponding sub-airbag.

[0022] For example, in the aerostat provided in some embodiments of the present application, the auxiliary airbag includes a plurality of sub-airbags;

[0023] The pressure control structure includes sub-control structures corresponding to each sub-airbag respectively. The aerostat includes a control console, and each sub-control structure is arranged in the control console.

[0024] For example, in some embodiments of the present application, the auxiliary airbag includes a first opening, the first opening is provided with a first flange, and the first flange includes a first mounting portion;

[0025] The air duct further includes a second flange disposed on a side close to the first valve, and the second flange includes a second mounting portion for fixing to the first mounting portion.

[0026] A second embodiment of the present invention provides a wind power generation system, comprising the aerostat as described in the first embodiment, and a wind turbine generator mounted on the aerostat.

[0027] A third embodiment of the present invention provides a control method applied to the wind power generation system described in the second embodiment, comprising:

[0028] The controller of the pressure control structure controls the blower, the first valve and the second valve to exhaust or inflate the auxiliary airbag according to the air pressure of the airbag sensed by the pressure difference sensor.

[0029] For example, in the control methods provided in some embodiments of the present application, the controller of the pressure control structure controls the blower, the first valve, and the second valve to exhaust or inflate the auxiliary airbag according to the air pressure of the airbag sensed by the pressure differential sensor, further comprising:

[0030] If the air pressure in the airbag is greater than a preset first threshold, the controller controls the first valve and the second valve to open and controls the blower to reverse to discharge the gas in the auxiliary airbag until the air pressure in the airbag is less than or equal to a second threshold;

[0031] If the air pressure in the bag is less than a preset third threshold, the controller controls the first valve and the second valve to open and controls the blower to rotate forward to fill the auxiliary air bag with ambient air until the air pressure in the bag is greater than or equal to a fourth threshold.

[0032] For example, in the control method provided in some embodiments of the present application, the first valve, the air duct pipe and the fan form a first cavity, the airship further includes a first drying chamber provided on the tube wall of the air duct pipe of the first cavity, the first drying chamber including a first desiccant, a first heating film, and a first drying valve cover covering the first drying chamber; the second valve, the air duct pipe and the fan form a second cavity, the airship further includes a second drying chamber provided on the tube wall of the air duct pipe of the second cavity, the second drying chamber including a second desiccant, a second heating film, and a second drying valve cover covering the second drying chamber; the airship further includes a drying push rod provided on the outside of the air duct pipe, and a drying connecting rod respectively connecting the first drying valve cover and the second drying valve cover, the drying push rod driving the first drying valve cover and the second drying valve cover via the drying connecting rod, and the control method further includes:

[0033] In the static working mode, the controller controls the first valve and the second valve to be closed, controls the fan to be closed, and controls the first drying valve cover and the second drying valve cover to be closed;

[0034] In the dehumidification mode, the controller controls the first valve and the second valve to close, controls the fan to reverse, and controls the first drying valve cover and the second drying valve cover to open, so that the gas of the auxiliary airbag passes through the first desiccant of the first drying chamber and the second desiccant of the second drying chamber in sequence to dehumidify the gas of the auxiliary airbag;

[0035] In the desiccant dehumidification mode, the controller controls the first valve and the second valve to be closed, controls the fan to be closed, controls the first drying valve cover and the second drying valve cover to be closed, controls the first heating film to heat the first desiccant, and controls the second heating film to heat the second desiccant, so that moisture in the first desiccant and the second desiccant evaporates.

[0036] The beneficial effects of the present invention are as follows:

[0037] To address existing issues, the present invention provides an aerostat, wind power generation system, and control method with a built-in pressure-regulating structure. By integrating the first and second valves of the aerostat's pressure-regulating structure with a fan within an air duct, which is then positioned within an auxiliary airbag, the pressure-regulating structure responds to control from a controller within a pressure control structure located outside the auxiliary airbag, thereby venting or inflating the auxiliary airbag. This embodiment, integrating the pressure-regulating structure within the auxiliary airbag, features a compact structure, high pressure, excellent airtightness, easy installation, excellent maintainability, and superior protection. This overcomes existing issues in the prior art, significantly improving the stability and reliability of high-altitude wind power generation systems and possessing practical application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 A structural block diagram of an aerostat according to an embodiment of the present invention is shown;

[0040] Figure 2 A schematic structural diagram of an air duct according to an embodiment of the present invention is shown;

[0041] Figure 3 A schematic diagram illustrating a static operating mode according to an embodiment of the present invention;

[0042] Figure 4 A schematic diagram illustrating an inflation mode according to an embodiment of the present invention;

[0043] Figure 5 A schematic diagram showing a dehumidification mode according to an embodiment of the present invention;

[0044] Figure 6 A structural block diagram of a wind power generation system according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0045] In order to more clearly illustrate the present invention, the present invention is further described below in conjunction with preferred embodiments and accompanying drawings. Similar components in the accompanying drawings are represented by the same reference numerals. It should be understood by those skilled in the art that the following detailed description is illustrative rather than restrictive and should not be used to limit the scope of protection of the present invention.

[0046] In response to the problems existing in the prior art, an embodiment of the present invention provides an aerostat based on a built-in pressure regulating structure, comprising an auxiliary airbag, a pressure regulating structure arranged inside the auxiliary airbag, and a pressure control structure arranged outside the auxiliary airbag, wherein:

[0047] The pressure regulating structure includes an air duct, a first valve provided at one end of the air duct, a second valve provided at the other end of the air duct, and a fan provided in the air duct between the first valve and the second valve;

[0048] The pressure control structure includes a controller and a pressure differential sensor. The controller is used to control the blower, the first valve and the second valve to exhaust or inflate the auxiliary airbag according to the air pressure of the airbag sensed by the pressure differential sensor.

[0049] In this embodiment, if Figure 1 The figure shows a block diagram of the structure of the aerostat of the present invention. The aerostat includes a main airbag (not shown) and auxiliary airbags. The auxiliary airbags include, for example, auxiliary airbags, tail airbags, and ring airbags. The main airbag is helium-filled and used to provide buoyancy and, when the aerostat is used in a wind power generation system, to support the installation of the wind turbine generator. The other airbags are air-filled auxiliary airbags. The auxiliary airbag is used to maintain the shape of the main airbag, while the tail airbag and ring airbags are used to improve the airborne stability and positioning ability of the aerostat. Each airbag is an airtight independent airbag. The tail airbag includes four airbags arranged at a 90° angle to the rear of the main airbag; the ring airbags include four airbags fixed to the top of the tail airbag.

[0050] In this embodiment, if Figure 2The figure shows a partial schematic diagram of an auxiliary airbag, wherein the auxiliary airbag 30 includes a first opening 31, which is provided with a first flange 32, and the first flange 32 includes a first mounting portion 321. A pressure regulating structure is disposed within the first opening 31 of the auxiliary airbag and includes an air duct 10, a first valve 11 disposed at one end of the air duct 10, a second valve 12 disposed at the other end of the air duct 10, and a fan 13 disposed in the air duct 10 between the first valve 11 and the second valve 12. The fan 13 in the air duct 10 responds to the controller of the external pressure control structure and operates according to the air pressure in the airbag sensed by the pressure differential sensor. For example, the fan 13 rotates in the forward or reverse direction according to the applied voltage, and the first valve 11 and the second valve 12 open or close in response to the control of the controller, thereby exhausting or inflating the auxiliary airbag through the fan 13, the first valve 11, and the second valve 12 integrated in the air duct 10. The pressure differential sensor includes a first end and a second end. The first end collects the ambient air pressure, and the second end is connected to the airbag of the auxiliary airbag to measure the pressure difference between the internal air pressure of the auxiliary airbag and the ambient air pressure. The pressure control structure of this embodiment is arranged on a circuit board or control board outside the auxiliary airbag. At the same time, in this embodiment, the air duct 10 also includes a second flange 19 arranged on the side near the first valve 11. The second flange 19 includes a second mounting portion 191 for fixing to the first mounting portion 321. Specifically, the air duct 10 is mounted and secured via the second mounting portion 191 of the second flange 19 to the first mounting portion 321 of the first flange 32 at the outlet of the first opening 31 of the auxiliary airbag 30. Compared to related art techniques that utilize separate blower and valve assemblies within the auxiliary airbag for exhaust or inflation, each mounted using flanges according to its structure, this embodiment integrates the first valve, second valve, and blower within the air duct, effectively simplifying the pressure regulation structure while offering advantages such as easy installation and maintenance. This effectively improves the overall stability and assembly performance of the aerostat and reduces its manufacturing costs.

[0051] In a specific embodiment, Figure 2 As shown, the pressure regulating structure also includes a valve motor 14, a reduction gear 15, a valve connecting rod 16, a first bevel gear 17 and a second bevel gear 18 arranged outside the air duct, wherein the valve connecting rod 16 includes a first end and a second end, the first end of the valve connecting rod 16 drives the first valve 11 through the first bevel gear 17, and the second end of the valve connecting rod 16 drives the second valve 12 through the second bevel gear 18; the valve motor 14 drives the valve connecting rod 16 through the reduction gear 15.

[0052] In this embodiment, considering the overall manufacturing cost and control requirements of the aerostat, a set of interlocking actuating devices is installed outside the air duct 10 to synchronously drive the operation of the first valve 11 and the second valve 12. Specifically, the first valve 11 is connected to a first bevel gear 17, which drives the opening and closing of the first valve 11. Similarly, the second valve 12 is connected to a second bevel gear 18, which drives the opening and closing of the second valve 12. A valve connecting rod 16 is also provided, with its ends connected to the first bevel gear 17 and the second bevel gear 18, respectively. The valve connecting rod is connected to a reduction gear 15, which is driven by the valve blower 14.

[0053] In actual operation, when the pressure differential sensor of the pressure control structure provided outside the auxiliary airbag senses the air pressure of the airbag, the controller transmits a control signal to the fan 13 and the valve motor 14 according to the sensed air pressure of the airbag. For example, when the air pressure in the bag is greater than a preset first threshold, for example, greater than a high-pressure maximum threshold for the safe operation of the auxiliary airbag, the controller sends an exhaust signal to the fan 13 to reverse the fan, and sends a valve opening signal to the valve motor 14. The valve motor 14 drives the reducer 15 to control the movement of the valve connecting rod 16, and opens the first valve 11 and the second valve 12 respectively through the first bevel gear 17 and the second bevel gear 18. The air in the bag is discharged through the second valve 12, the fan 13 and the first valve 11 until the air pressure in the bag is less than or equal to a preset second threshold, for example, less than or equal to the high-pressure minimum threshold for the safe operation of the auxiliary airbag; the controller sends a closing signal to the fan 13 to stop the fan, and sends a valve closing signal to the valve motor 14. The valve motor 14 drives the reducer 15 to control the movement of the valve connecting rod 16, and closes the first valve 11 and the second valve 12 respectively through the first bevel gear 17 and the second bevel gear 18.

[0054] Similarly, when the air pressure in the bag is lower than the preset minimum low-pressure threshold for the safe operation of the auxiliary airbag, the controller sends an inflation signal to the fan 13 to make the fan rotate forward, and sends a valve opening signal to the valve motor 14. The valve motor 14 drives the reducer 15 to control the movement of the valve connecting rod 16, and opens the first valve 11 and the second valve 12 respectively through the first bevel gear 17 and the second bevel gear 18. The ambient air is filled into the auxiliary bag through the first valve 11, the fan 13 and the second valve 12 until the air pressure in the bag is greater than or equal to the preset maximum low-pressure threshold for the safe operation of the auxiliary airbag; the controller sends a closing signal to the fan 13 to stop the fan, and sends a valve closing signal to the valve motor 14. The valve motor 14 drives the reducer 15 to control the movement of the valve connecting rod 16, and closes the first valve 11 and the second valve 12 respectively through the first bevel gear 17 and the second bevel gear 18.

[0055] In order to further finely control each valve, in an optional embodiment, the pressure regulating structure also includes a first valve driving device and a second valve driving device arranged outside the air duct, wherein the first valve driving device includes a first valve motor driving the first valve; the second valve driving device includes a second valve motor driving the second valve.

[0056] In this embodiment, two actuators are provided to drive the first and second valves, respectively. Each actuator includes a valve motor. The valve motors respond to control signals from a controller to control the opening and closing of the corresponding valves, thereby achieving independent control of each valve. For example, the first valve motor responds to the control signal to drive a connected reduction gearbox via a bevel gear to control the opening and closing of the first valve. The second valve motor responds to the control signal to drive a connected reduction gearbox via a bevel gear to control the opening and closing of the second valve.

[0057] Considering that the condensed water in the auxiliary airbag cannot be automatically discharged, in an optional embodiment, as Figure 2 As shown, the first valve 11, the air duct 10 and the fan 13 form a first cavity, that is, Figure 2 The aerostat further comprises a first drying chamber 21 provided on the wall of the air duct 10 of the first cavity, the first drying chamber 21 comprising a first desiccant, a first heating film, and a first drying valve cover covering the first drying chamber; correspondingly, the second valve 12, the air duct 10 and the fan 13 form a second cavity, i.e. Figure 2 The airship further comprises a second drying chamber 22 arranged on the wall of the air duct tube 10 of the second cavity, the second drying chamber 22 comprising a second desiccant, a second heating film, and a second drying valve cover covering the second drying chamber; the airship further comprises a drying push rod 23 arranged outside the air duct tube 10, and a drying connecting rod 24 respectively connecting the first drying valve cover and the second drying valve cover, the drying push rod 23 drives the first drying valve cover and the second drying valve cover through the drying connecting rod 24 in response to a control signal transmitted by the controller.

[0058] Due to the temperature difference between the air in the auxiliary airbag and the ambient air, moisture in the air condenses inside the airbag during the inflation and deflation process, making it difficult to discharge. Long-term accumulation of moisture can affect the safe operation of the auxiliary airbag. This embodiment is based on an integrated blower, first valve, and second valve structure integrated into the air duct. By setting two symmetrical drying chambers on the pipe walls of the upper and lower chambers of the air duct, the blower, first valve, second valve, first drying valve cover, and second drying valve cover are controlled to absorb and discharge moisture from the air in the auxiliary airbag, thereby achieving automatic dehumidification and dehumidification of the gas inside the airbag. Specifically, on the basis of closing the first and second valves, the air inside the airbag is automatically dehumidified by controlling the blower, first drying valve cover, and second drying valve cover; or the desiccant in each drying chamber is dried and dehumidified by controlling the blower, first drying valve cover, and second drying valve cover, first valve, and second valve.

[0059] In a specific example, multiple working modes of the auxiliary airbag are described separately, and the auxiliary airbag includes a static working mode, an inflation mode, an exhaust mode, a dehumidification mode, and a desiccant dehumidification mode.

[0060] like Figure 3 The figure shows the auxiliary airbag's static operating mode. In this mode, the auxiliary airbag's air pressure, as measured by the pressure control structure's differential pressure sensor, is within the normal operating range. Neither inflation nor deflation is required, and the auxiliary airbag's first opening is closed to the outside. Specifically, the blower 13 stops, and the first and second valves 12 close when the valve motor 14 drives the valve connecting rod 16 through the corresponding bevel gear via the reduction gear 15. The drying valve covers of the first and second drying chambers 21 and 22 close when the drying push rod 23 drives the drying connecting rod 24.

[0061] like Figure 4 The figure shows the auxiliary airbag inflation mode. In this mode, when the air pressure within the auxiliary airbag, as measured by the pressure control structure's differential pressure sensor, falls below the preset minimum pressure threshold for safe operation, inflation is required. Specifically, fan 13 rotates forward, and valve motor 14 drives reduction gearbox 15 to control valve connecting rod 16. This opens the first and second valves 12, respectively, via the first and second bevel gears. Ambient air then flows through the first valve, fan 13, and second valve 12 into the auxiliary airbag. The drying valve covers of the first and second drying chambers 21 and 22 are then closed by the drying push rod 23, driven by the drying connecting rod 24.

[0062] In the auxiliary airbag's exhaust mode, exhaust is required when the air pressure within the auxiliary airbag, as measured by the pressure control structure's differential pressure sensor, exceeds the preset maximum high-pressure threshold for safe operation. Specifically, the fan rotates in reverse, and the valve motor drives the reduction gearbox to control the valve linkage. This opens the first and second valves, respectively, via the first and second bevel gears. Air within the airbag is discharged through the second valve, the fan, and the first valve. The drying valve covers of the first and second drying chambers are then closed by the drying push rod, driven by the drying linkage.

[0063] like Figure 5 The figure shows the auxiliary airbag's dehumidification mode. In this mode, the auxiliary airbag's air pressure, as measured by the pressure control structure's differential pressure sensor, is within the normal operating range, requiring neither inflation nor exhaust. Specifically, the first and second valves 12 are closed when the valve motor 14, via the reduction gear 15, drives the valve connecting rod 16 through the corresponding bevel gears. The fan 13 rotates forward or reverse, and the drying valve covers of the first and second drying chambers 21 and 22 are driven open by the drying push rod 23 and the drying connecting rod 24. For example, when the fan rotates reversely, air in the airbag enters the first drying chamber 21, is dried by the first desiccant in the first drying chamber 21, then flows through the fan to the second drying chamber 22, where it is dried by the second desiccant before being discharged. In this manner, the air in the airbag circulates through the first and second desiccant, removing moisture from the air. When the fan rotates forward, air in the airbag enters the second drying chamber and exits the first drying chamber, removing moisture from the airbag.

[0064] In the desiccant dehumidification mode of the auxiliary airbag, in this mode, the air pressure of the auxiliary airbag body sensed by the pressure differential sensor of the pressure control structure meets the normal operating range and does not require inflation or exhaust. Specifically, when the first valve and the second valve are driven by a set of linked actuating devices, the first valve and the second valve are closed when the valve motor drives the valve connecting rod through the corresponding bevel gear through the reduction gear box, the fan stops, and the drying valve covers of the first drying chamber and the second drying chamber are driven to close by the drying connecting rod under the drive of the drying push rod. The heating film in each drying chamber heats the desiccant, causing the moisture absorbed by the desiccant to evaporate into water vapor, which slowly leaks into the external environment through the first valve. When the first valve and the second valve are driven by independent actuating devices respectively, the first valve is controlled to open, and the water vapor is directly discharged into the external environment, thereby achieving the removal of moisture from the desiccant.

[0065] In an optional embodiment, the auxiliary airbag includes a plurality of sub-airbags; the pressure control structure includes a sub-control structure corresponding to each sub-airbag, and each sub-control structure is arranged at the bottom of the corresponding sub-airbag.

[0066] In this embodiment, the pressure control structures of the multiple sub-airbags of the auxiliary airbag are separately set, for example, respectively set at the bottom of each sub-airbag, wherein the pressure difference sensor measures the pressure difference between the internal air pressure of the corresponding sub-airbag and the ambient air pressure, so that the controller can control the pressure regulating structure according to the air pressure of the airbag, such as controlling the fan, the first valve and the second valve to inflate or exhaust the auxiliary airbag.

[0067] In another optional embodiment, the auxiliary airbag includes a plurality of sub-airbags; the pressure control structure includes a sub-control structure corresponding to each sub-airbag, and the aerostat includes a control console, and each sub-control structure is arranged in the control console.

[0068] In this embodiment, the pressure control structures for the auxiliary airbag's multiple sub-airbags are centrally located, for example, within a control console at the bottom of the aerostat, facilitating installation and maintenance. Each differential pressure sensor measures the pressure difference between the internal pressure of the corresponding sub-airbag and the ambient pressure, allowing the corresponding controller to control the pressure regulation structure based on the airbag pressure, such as controlling the blower, first valve, and second valve to inflate or deflate the auxiliary airbag.

[0069] Based on the aerostat of the above embodiment, Figure 6 As shown, the present application also provides a wind power generation system, comprising the aerostat of the above embodiment and a wind turbine generator mounted on the aerostat.

[0070] The wind power generation system of this embodiment integrates the first and second valves of the pressure regulation structure of the aerostat's auxiliary airbag, along with the fan, into an air duct. The air duct is then positioned within the auxiliary airbag. The pressure regulation structure responds to control from a controller of a pressure control structure located outside the auxiliary airbag, thereby deflating or inflating the auxiliary airbag. This embodiment, with the pressure regulation structure integrated within the auxiliary airbag, offers a compact structure, high pressure, excellent airtightness, easy installation, improved maintainability, and superior protection. This significantly improves the stability and reliability of high-altitude wind power generation systems.

[0071] Based on the wind power generation system of the above embodiment, the present application further provides a pressure control method for a wind power generation system, wherein the wind power generation system includes an airship and a wind turbine mounted on the airship, wherein the airship includes an auxiliary airbag, a pressure regulating structure disposed inside the auxiliary airbag, and a pressure control structure disposed outside the auxiliary airbag, the pressure regulating structure including an air duct, a first valve disposed at one end of the air duct, a second valve disposed at the other end of the air duct, and a fan disposed in the air duct between the first valve and the second valve; the pressure control structure includes a controller and a pressure differential sensor, and the pressure control method includes:

[0072] The controller of the pressure control structure controls the blower, the first valve and the second valve to exhaust or inflate the auxiliary airbag according to the air pressure of the airbag sensed by the pressure difference sensor.

[0073] This embodiment integrates the pressure regulation structure of the auxiliary airbag of a wind turbine aerostat into an integrated arrangement. Specifically, the first and second valves of the pressure regulation structure, along with the fan, are integrated into an air duct, which is then positioned within the auxiliary airbag. The first and second valves, along with the fan, are controlled by a controller within a pressure control structure located outside the auxiliary airbag to deflate or inflate the auxiliary airbag. This embodiment, integrating the pressure regulation structure within the auxiliary airbag, offers advantages such as a compact structure, high pressure, excellent airtightness, easy installation, improved maintainability, and superior protection. This significantly improves the stability and reliability of high-altitude wind turbine systems.

[0074] In a specific embodiment, the controller of the pressure control structure controls the blower, the first valve, and the second valve to exhaust or inflate the auxiliary airbag according to the air pressure of the airbag sensed by the pressure difference sensor, further comprising:

[0075] If the air pressure in the airbag is greater than a preset first threshold, the controller controls the first valve and the second valve to open and controls the blower to reverse to discharge the gas in the auxiliary airbag until the air pressure in the airbag is less than or equal to a second threshold;

[0076] If the air pressure in the bag is less than a preset third threshold, the controller controls the first valve and the second valve to open and controls the blower to rotate forward to fill the auxiliary air bag with ambient air until the air pressure in the bag is greater than or equal to a fourth threshold.

[0077] In this embodiment, different pressure thresholds are set for each auxiliary airbag, such as maximum and minimum high-pressure thresholds, as well as maximum and minimum low-pressure thresholds, based on the design requirements. Specifically, the controller obtains the airbag pressure sensed by the differential pressure sensor in real time and compares it with the maximum and minimum high-pressure thresholds to inflate and deflate the auxiliary airbag.

[0078] Specifically, when the air pressure in the bag is greater than the maximum threshold of high pressure, it indicates that the auxiliary air bag needs to be exhausted to reduce the air pressure inside the bag. At this time, the controller controls the fan to reverse, opens the first valve and the second valve to discharge the gas in the auxiliary air bag for exhaust, and detects the air pressure in the bag in real time. When the air pressure in the bag is less than or equal to the minimum threshold of high pressure, it will no longer be exhausted, and the fan, the first valve and the second valve will be closed at the same time.

[0079] Similarly, when the air pressure in the bag is lower than the minimum low-pressure threshold, it indicates that the corresponding auxiliary air bag needs to be inflated to increase the air pressure inside the bag. At this time, the controller controls the fan to rotate forward, opens the first valve and the second valve to inflate the auxiliary air bag, and detects the air pressure in the bag in real time. When the air pressure in the bag is greater than or equal to the maximum low-pressure threshold, it will no longer be inflated, and the first valve and the second valve will be closed first, and then the fan will be turned off.

[0080] This embodiment pre-sets pressure thresholds for different airbags. A controller compares the airbag pressure sensed by the differential pressure sensor with the pressure threshold. The airbags are then inflated or deflated according to specific circumstances using a blower, a first valve, and a second valve integrated into the air duct within the auxiliary airbag. This embodiment integrates the pressure regulation structure within the auxiliary airbag, resulting in a compact structure, high pressure, excellent airtightness, easy installation, improved maintainability, and superior protection. This significantly improves the stability and reliability of high-altitude wind power generation systems.

[0081] In an optional embodiment, the first valve, the air duct pipe and the fan form a first cavity, the aerostat further includes a first drying chamber provided on the tube wall of the air duct pipe of the first cavity, the first drying chamber including a first desiccant, a first heating film, and a first drying valve cover covering the first drying chamber; the second valve, the air duct pipe and the fan form a second cavity, the aerostat further includes a second drying chamber provided on the tube wall of the air duct pipe of the second cavity, the second drying chamber including a second desiccant, a second heating film, and a second drying valve cover covering the second drying chamber; the aerostat further includes a drying push rod provided on the outside of the air duct pipe, and a drying connecting rod respectively connected to the first drying valve cover and the second drying valve cover, the drying push rod driving the first drying valve cover and the second drying valve cover via the drying connecting rod, and the control method further includes:

[0082] In the static working mode, the controller controls the first valve and the second valve to be closed, controls the fan to be closed, and controls the first drying valve cover and the second drying valve cover to be closed;

[0083] In the dehumidification mode, the controller controls the first valve and the second valve to close, controls the fan to reverse, and controls the first drying valve cover and the second drying valve cover to open, so that the gas of the auxiliary airbag passes through the first desiccant of the first drying chamber and the second desiccant of the second drying chamber in sequence to dehumidify the gas of the auxiliary airbag;

[0084] In the desiccant dehumidification mode, the controller controls the first valve and the second valve to be closed, controls the fan to be closed, controls the first drying valve cover and the second drying valve cover to be closed, controls the first heating film to heat the first desiccant, and controls the second heating film to heat the second desiccant, so that moisture in the first desiccant and the second desiccant evaporates.

[0085] Considering the temperature difference between the air in the auxiliary airbag and the ambient air, during the inflation and deflation process of the auxiliary airbag, moisture in the air condenses inside the airbag and is difficult to discharge. Long-term accumulation will affect the safe operation of the auxiliary airbag. This embodiment is based on an integrated blower, a first valve, and a second valve structure integrated on the air duct. By setting two symmetrical drying chambers on the tube walls of the upper and lower chambers of the air duct, the blower, the first valve, the second valve, the first drying valve cover, and the second drying valve cover are controlled to absorb and discharge the moisture in the air of the auxiliary airbag, thereby achieving automatic dehumidification and dehumidification of the gas inside the airbag. Specifically, on the basis of closing the first valve and the second valve, the air inside the airbag is automatically dehumidified by controlling the blower, the first drying valve cover, and the second drying valve cover; or the desiccant in each drying chamber is dried and dehumidified by controlling the blower, the first drying valve cover, the second drying valve cover, the first valve, and the second valve. The specific implementation of this embodiment refers to the previous embodiment and will not be repeated here.

[0086] To address existing issues, the present invention provides an aerostat, wind power generation system, and control method with a built-in pressure-regulating structure. By integrating the first and second valves of the aerostat's pressure-regulating structure with a fan within an air duct, which is then positioned within an auxiliary airbag, the pressure-regulating structure responds to control from a controller within a pressure control structure located outside the auxiliary airbag, thereby venting or inflating the auxiliary airbag. This embodiment, integrating the pressure-regulating structure within the auxiliary airbag, features a compact structure, high pressure, excellent airtightness, easy installation, excellent maintainability, and superior protection. This overcomes existing issues in the prior art, significantly improving the stability and reliability of high-altitude wind power generation systems and possessing practical application value.

[0087] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. An aerostat based on a built-in pressure regulating structure, characterized in that: It includes an auxiliary airbag, a pressure regulating structure arranged inside the auxiliary airbag, and a pressure control structure arranged outside the auxiliary airbag, wherein: The pressure regulating structure includes an air duct, a first valve provided at one end of the air duct, a second valve provided at the other end of the air duct, and a fan provided in the air duct between the first valve and the second valve; The pressure control structure includes a controller and a pressure differential sensor, wherein the controller is used to control the blower, the first valve and the second valve to exhaust or inflate the auxiliary airbag according to the air pressure of the airbag sensed by the pressure differential sensor; The pressure regulating structure further includes a valve motor, a reduction gear, a valve connecting rod, a first bevel gear, and a second bevel gear, all of which are arranged outside the air duct, wherein the valve connecting rod includes a first end and a second end, the first end of the valve connecting rod drives the first valve via the first bevel gear, and the second end of the valve connecting rod drives the second valve via the second bevel gear, and the valve motor drives the valve connecting rod via the reduction gear; alternatively, the pressure regulating structure further includes a first valve driving device and a second valve driving device, all of which are arranged outside the air duct, wherein the first valve driving device includes a first valve motor that drives the first valve, and the second valve driving device includes a second valve motor that drives the second valve; The first valve, the air duct and the fan form a first cavity, the aerostat further comprising a first drying chamber disposed on a tube wall of the air duct of the first cavity, the first drying chamber comprising a first desiccant, a first heating film, and a first drying valve cover covering the first drying chamber; The second valve, the air duct and the fan form a second cavity, the aerostat further comprising a second drying chamber disposed on a tube wall of the air duct of the second cavity, the second drying chamber comprising a second desiccant, a second heating film, and a second drying valve cover covering the second drying chamber; The aerostat further includes a drying push rod disposed outside the air duct, and a drying connecting rod respectively connecting the first drying valve cover and the second drying valve cover, wherein the drying push rod drives the first drying valve cover and the second drying valve cover through the drying connecting rod.

2. The aerostat according to claim 1, wherein: The auxiliary airbag includes a plurality of sub-airbags; The pressure control structure includes a sub-control structure corresponding to each sub-airbag, and each sub-control structure is arranged at the bottom of the corresponding sub-airbag; or The pressure control structure includes sub-control structures corresponding to each sub-airbag respectively. The aerostat includes a control console, and each sub-control structure is arranged in the control console.

3. The aerostat according to claim 1, wherein: The auxiliary airbag includes a first opening, the first opening is provided with a first flange, and the first flange includes a first mounting portion; The air duct further includes a second flange disposed on a side close to the first valve, and the second flange includes a second mounting portion for fixing to the first mounting portion.

4. A wind power generation system, characterized in that: The invention comprises an aerostat according to any one of claims 1 to 3, and a wind turbine generator mounted on the aerostat.

5. A control method applied to the wind power generation system according to claim 4, characterized in that: include: The controller of the pressure control structure controls the blower, the first valve and the second valve to exhaust or inflate the auxiliary airbag according to the air pressure of the airbag sensed by the pressure difference sensor; The first valve, the air duct pipe and the fan form a first cavity, the airship further includes a first drying chamber arranged on the tube wall of the air duct pipe of the first cavity, the first drying chamber including a first desiccant, a first heating film, and a first drying valve cover covering the first drying chamber; the second valve, the air duct pipe and the fan form a second cavity, the airship further includes a second drying chamber arranged on the tube wall of the air duct pipe of the second cavity, the second drying chamber including a second desiccant, a second heating film, and a second drying valve cover covering the second drying chamber; the airship further includes a drying push rod arranged outside the air duct pipe, and a drying connecting rod respectively connecting the first drying valve cover and the second drying valve cover, the drying push rod driving the first drying valve cover and the second drying valve cover through the drying connecting rod, and the control method further includes: In the static working mode, the controller controls the first valve and the second valve to be closed, controls the fan to be closed, and controls the first drying valve cover and the second drying valve cover to be closed; In the dehumidification mode, the controller controls the first valve and the second valve to close, controls the fan to reverse, and controls the first drying valve cover and the second drying valve cover to open, so that the gas of the auxiliary airbag passes through the first desiccant of the first drying chamber and the second desiccant of the second drying chamber in sequence to dehumidify the gas of the auxiliary airbag; In the desiccant dehumidification mode, the controller controls the first valve and the second valve to be closed, controls the fan to be closed, controls the first drying valve cover and the second drying valve cover to be closed, controls the first heating film to heat the first desiccant, and controls the second heating film to heat the second desiccant, so that moisture in the first desiccant and the second desiccant evaporates.

6. The control method according to claim 5, characterized in that: The controller of the pressure control structure controls the blower, the first valve and the second valve to exhaust or inflate the auxiliary airbag according to the air pressure of the airbag sensed by the pressure difference sensor, further comprising: If the air pressure in the airbag is greater than a preset first threshold, the controller controls the first valve and the second valve to open and controls the blower to reverse to discharge the gas in the auxiliary airbag until the air pressure in the airbag is less than or equal to a second threshold; If the air pressure in the bag is less than a preset third threshold, the controller controls the first valve and the second valve to open and controls the blower to rotate forward to fill the auxiliary air bag with ambient air until the air pressure in the bag is greater than or equal to a fourth threshold.

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