Aerostat, wind power generation system and control method with integrated pressure regulating structure

Abstract

The present invention discloses an airship, wind power generation system, and control method with an integrated pressure-regulating structure. In one embodiment, the airship includes an auxiliary airbag, a housing disposed externally of the auxiliary airbag, and an air pressure regulating device for regulating the air pressure in the auxiliary airbag. The air pressure regulating device includes a controller, a pressure differential sensor, a fan and an electric valve integrated into the housing, and a first connecting pipe connecting the fan and the electric valve. The controller controls the electric valve to deflate the auxiliary airbag or to inflate the auxiliary airbag based on the air pressure in the airbag sensed by the pressure differential sensor. The embodiments provided by the present invention integrate the fan and electric valve of the airship's air pressure regulating device into the housing externally of the auxiliary airbag, resulting in a compact structure, good airtightness, easy installation, and excellent maintainability. 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 an integrated 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. The pressure regulating device is not easy to install and has poor maintainability: the installation method of connecting the flange and the bladder is complicated. When a fault occurs, it cannot be repaired online. The maintenance work can only be carried out after the entire system is withdrawn. The reliability and maintainability are poor. Summary of the Invention

[0007] In order to solve at least one of the above problems, the first embodiment of the present invention provides an aerostat based on an integrated pressure regulating structure, comprising an auxiliary airbag, a box arranged outside the auxiliary airbag, and an air pressure regulating device for regulating the air pressure of the auxiliary airbag, wherein:

[0008] The air pressure regulating device includes a controller, a pressure differential sensor, a fan and an electric valve integrated in the box, and a first connecting pipe connecting the fan and the electric valve. The controller is used to control the electric valve to deflate the auxiliary airbag according to the bag air pressure sensed by the pressure differential sensor, or to control the fan and the electric valve to inflate the auxiliary airbag.

[0009] For example, in the aerostat provided in some embodiments of the present application, the first connecting pipe is led out along the air inlet and air outlet of the box body, and is connected to the second connecting pipe connected to the auxiliary airbag by a snap connection at a position preset distance from the air inlet and air outlet.

[0010] For example, in the airship provided in some embodiments of the present application, the differential pressure sensor and the controller are arranged in the box body, and the differential pressure sensor includes a first end and a second end, the first end is used to collect the ambient air pressure, and the second end is used to collect the air pressure of the auxiliary airbag.

[0011] For example, in the aerostat provided in some embodiments of the present application, the box includes a first box and a second box that are isolated from each other.

[0012] The first box includes the exhaust port, a fan, an electric valve, a first connecting pipe, and the controller;

[0013] The second box includes the differential pressure sensor and a communication port.

[0014] For example, in the aerostat provided in some embodiments of the present application, the electric valve is a butterfly valve or a ball valve driven by a DC motor;

[0015] The first connecting tube is a heat shrinkable tube with an adhesive layer, the thickness of the adhesive layer is greater than or equal to 0.8 mm and less than or equal to 1.2 mm, and the wall thickness of the heat shrinkable tube is greater than or equal to 2.75 mm and less than or equal to 3.25 mm.

[0016] For example, in the aerostat provided in some embodiments of the present application, the box is installed at the bottom position of the auxiliary airbag, the auxiliary airbag includes a first mounting portion connected to the box, and the box includes a second mounting portion corresponding to the first mounting portion.

[0017] The first mounting portion includes a plurality of first mounting holes;

[0018] The second mounting portion includes a plurality of second mounting holes corresponding to the first mounting holes;

[0019] The aerostat uses a binding rope to sequentially pass through each first mounting hole and the second mounting hole in a cross manner to fix the box.

[0020] For example, in the aerostat provided in some embodiments of the present application, the auxiliary airbag includes a plurality of sub-airbags, and the aerostat includes a box and an air pressure regulating device corresponding to each sub-airbag.

[0021] The air pressure regulating device is arranged in the box body.

[0022] For example, in some embodiments of the present application, the auxiliary airbag includes a plurality of sub-airbags, and the aerostat includes a control console, and a box and an air pressure regulating device corresponding to each sub-airbag.

[0023] The console includes a controller and a differential pressure sensor for each air pressure regulating device, and each box includes a fan, a first connecting pipe and an electric valve of the air pressure regulating device.

[0024] For example, in some embodiments of the present application, the auxiliary airbag includes a plurality of sub-airbags, the aerostat includes an air pressure regulating device corresponding to each sub-airbag, and the box includes a control sub-box and a regulating sub-box corresponding to each sub-airbag.

[0025] The control sub-box includes a controller and a differential pressure sensor of each air pressure regulating device, and the regulating sub-box includes a fan, a first connecting pipe and an electric valve of each air pressure regulating device.

[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 pressure control method applied to the wind power generation system of the second embodiment, comprising:

[0028] The controller controls the electric valve to deflate the auxiliary airbag according to the air pressure of the airbag sensed by the pressure difference sensor, or controls the fan and the electric valve to inflate the auxiliary airbag.

[0029] For example, in the pressure control method provided in some embodiments of the present application, the controller controls the electric valve to deflate the auxiliary airbag, or controls the fan and the electric valve to 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 electric valve to open, and discharges the gas in the auxiliary airbag to deflate it until the air pressure in the airbag is less than or equal to a second threshold;

[0031] If the air pressure in the airbag is less than a preset third threshold, the controller starts the blower, controls the electric valve to open, introduces ambient air and inflates the auxiliary airbag until the air pressure in the airbag is greater than or equal to a fourth threshold.

[0032] The beneficial effects of the present invention are as follows:

[0033] In response to the current existing problems, the present invention develops an airship, a wind power generation system and a control method with an integrated pressure regulation structure. By integrating the fan and the electric valve of the air pressure regulating device of the auxiliary airbag of the airship into the box, the system has the characteristics of compact structure, high pressure, good airtightness, convenient installation, good maintainability and good protection, thereby compensating for the problems existing in the prior art, significantly improving the stability and reliability of the airship set at high altitude, and having practical application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] 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.

[0035] Figure 1 A structural block diagram of an aerostat according to an embodiment of the present invention is shown;

[0036] Figure 2 A schematic structural diagram of a box according to an embodiment of the present invention is shown;

[0037] Figure 3a A side view of an electric valve according to an embodiment of the present invention is shown;

[0038] Figure 3b A schematic diagram showing the valve opening of the electric valve according to one embodiment of the present invention is shown;

[0039] Figure 3c A schematic diagram showing a valve closing state of an electric valve according to an embodiment of the present invention is shown;

[0040] Figure 4 A schematic diagram showing the connection of a box according to an embodiment of the present invention is shown;

[0041] Figure 5 A schematic structural diagram of a box according to another embodiment of the present invention is shown;

[0042] Figure 6 A schematic structural diagram of a box according to another embodiment of the present invention is shown;

[0043] Figure 7 A structural block diagram of a wind power generation system according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0044] 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.

[0045] In view of the problems existing in the prior art, an embodiment of the present invention provides an aerostat based on an integrated pressure regulating system.

[0046] The invention comprises an auxiliary airbag, a box body arranged outside the auxiliary airbag, and an air pressure regulating device for regulating the air pressure of the auxiliary airbag, wherein:

[0047] The air pressure regulating device includes a controller, a pressure differential sensor, a fan and an electric valve integrated in the box, and a first connecting pipe connecting the fan and the electric valve. The controller is used to control the electric valve to deflate the auxiliary airbag according to the bag air pressure sensed by the pressure differential sensor, or to control the fan and the electric valve to inflate the auxiliary airbag.

[0048] 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.

[0049] To ensure the safe and stable operation of the aerostat, Figure 2 As shown, this embodiment integrates the fan 3 and electric valve 4 of the air pressure regulating device of the aerostat into a housing, and the fan 3 and the electric valve 4 are connected through a first connecting pipe 1. The fan 3 is a high-speed DC brushless axial flow fan, which has the characteristics of high speed, small size, light weight, large flow rate and high static pressure. The electric valve 4 is a butterfly valve or ball valve driven by a DC motor. Figure 3a-3c It is a structural diagram of the butterfly valve, as shown in Figure 3a The figure shows the valve side view of the butterfly valve. Figure 3b The butterfly valve is in the open state. Figure 3c The butterfly valve is in the closed state.

[0050] Specifically, such as Figure 3aAs shown, the electric butterfly valve includes a valve body 21, a communication channel 22, an actuator motor 23, an actuator housing 24, an actuator 25 and a power line 26. Figure 3b and Figure 3c As shown, the electric butterfly valve includes a butterfly plate 27, a sealing ring 28 arranged on the butterfly plate, and a connecting rod 29. The electric butterfly valve includes two working states: open and closed. The power source of the electric butterfly valve is a DC motor. The rotational motion of the DC motor is transmitted to the connecting rod 29 through the connecting channel 22 to meet the torque requirements for opening and closing the butterfly plate 27, so that the connecting rod 29 can smoothly drive the butterfly plate 27 to rotate. By controlling the direction of the input DC motor current, the butterfly plate is driven to perform the opening or closing action. The butterfly plate 27 is embedded with a limit switch. When the valve opening or closing action is in place, the power is automatically cut off, and the open / close position signal is fed back to the actuator 25 to prevent the actuator motor 23 from stalling. In particular, a sealing ring 28 is installed on the butterfly plate 27. After the electric valve is closed, the sealing ring is compressed, which effectively improves the sealing performance of the electric valve, so that the electric valve takes into account the fan sealing performance and the exhaust or venting function. This embodiment utilizes an integrated electric valve and blower housed within a housing. The controller of the pressure regulating device controls the inflation and deflation of the auxiliary airbags, tail fins, and ring fins, ensuring that the pressure of the auxiliary airbags remains within a set range, maintaining the shape and rigidity of each airbag and adapting to changes in the external environment. This embodiment, in other words, features an integrated pressure regulating structure with a blower and electric valve. This structure offers a compact structure, high pressure, excellent airtightness, easy installation, excellent maintainability, and superior protection. It effectively overcomes the issues of flow and static pressure loss associated with the blower, as well as the poor sealing performance and rapid leakage of the pressure regulating device.

[0051] To further ensure the sealing performance between the fan and the electric valve, the first connecting pipe is a heat shrink tube with an adhesive layer, the thickness of the adhesive layer is greater than or equal to 0.8 mm and less than or equal to 1.2 mm, and the wall thickness of the heat shrink tube is greater than or equal to 2.75 mm and less than or equal to 3.25 mm.

[0052] In this embodiment, during the manufacturing and installation process, the first connecting pipe shrinks due to heat, and has good sealing and flexibility, which facilitates the installation and connection of the fan and the electric valve.

[0053] In an optional embodiment, if Figure 2 As shown, the differential pressure sensor 6 and the controller 5 are arranged in the box body. The differential pressure sensor 6 includes a first end 13 and a second end 12. The first end 13 is used to collect ambient air pressure, and the second end 12 is used to collect the air pressure of the auxiliary airbag.

[0054] In this embodiment, if Figure 2As shown, the first end 13 of the differential pressure sensor 6 collects ambient air pressure via a connecting port 14 provided on the housing. The second end 12, connected to the auxiliary airbag body, measures the pressure difference between the internal pressure of the auxiliary airbag and the ambient pressure. This allows the controller of the air pressure regulating device to control the electric valve to deflate the auxiliary airbag or the blower and electric valve to inflate the auxiliary airbag based on the air pressure inside the airbag measured by the differential pressure sensor. This embodiment integrates the air pressure regulating device entirely within the housing, resulting in a more compact structure, higher pressure capability, and improved airtightness compared to conventional pressure regulating devices.

[0055] Furthermore, in an optional embodiment, as Figure 2 As shown, the box body includes a first box body 7 and a second box body 8 isolated from each other, the first box body 7 includes an air inlet and exhaust port (not shown in the figure), the fan 3, the electric valve 4, the first connecting pipe, the first connecting pipe includes a first pipe portion 1 provided to connect the fan and the electric valve, and a second pipe portion 2 of the second connecting pipe connected to the other end of the electric valve and extending out of the box and used to connect to the auxiliary airbag, and the controller 5; the second box body 8 includes a differential pressure sensor 6 and a connecting air port 14.

[0056] In this embodiment, considering the sensitivity and accuracy of the differential pressure sensor, a sealing plate 10 is used to separate the housing into two mutually sealed sections: a mounting housing 7 and a static pressure chamber 8. The larger portion of the housing is the mounting housing 7, which is used to house the fan 3, the electric valve 4, the first connecting pipe, and the control board 5. The smaller portion of the housing is the static pressure chamber 8, which is used to house the differential pressure sensor 6. Ambient air pressure is obtained through a connecting air port 14 provided on the housing, thereby preventing the airflow from the fan 3 and external airflow from affecting the ambient air pressure and improving the accuracy of the differential pressure sensor's pressure differential measurement. The housing of this embodiment utilizes a waterproof aluminum alloy casing, which features light weight, high corrosion resistance, good sealing, and excellent heat dissipation.

[0057] In an optional embodiment, if Figure 4 As shown, the box body 34 is installed at the bottom position of the auxiliary airbag 31, and the auxiliary airbag 31 includes a first mounting portion 41 connected to the box body 34, and the box body 34 includes a second mounting portion 35 corresponding to the first mounting portion 41, and the first mounting portion 41 includes a plurality of first mounting holes; the second mounting portion 35 includes a plurality of second mounting holes corresponding to the first mounting holes; the airship uses a binding rope 40 to pass through each first mounting hole and the second mounting hole in a cross manner to fix the box body 34.

[0058] In this embodiment, the aerostat includes an auxiliary airbag 31, a box body 34 arranged at the bottom of the auxiliary airbag 31, a blower, an electric valve, a control panel and a differential pressure sensor of an air pressure regulating device integrated in the box body 34, and the box body 34 is powered by a cable 33; an air inlet and outlet 36 is provided on the surface of the box body 34 corresponding to the position where the box body is installed, so as to facilitate the air intake or exhaust of the auxiliary airbag, for example, for the blower to intake air to the auxiliary airbag, and for the electric valve to exhaust air to the auxiliary airbag; a connecting air port 37 is provided on the surface of the box body 34 corresponding to the position of the static pressure chamber, so as to facilitate the first end of the differential pressure sensor to pass through The connecting air port collects the ambient air pressure to realize the connection between the static pressure air chamber and the outside world; the first connecting pipe connected to the other end of the electric valve in the box body 34 is connected to the second connecting pipe 32 through at least two clamps 36, and the other end of the second connecting pipe 32 is connected to the auxiliary air bag (not shown in the figure) so as to facilitate the exhaust or inflation of the auxiliary air bag 31 through the second connecting pipe 32; at the same time, the box body 34 is connected to the second end of the differential pressure sensor through a pressure-guiding pipe 38 connected to the auxiliary air bag body so as to measure the air pressure of the bag body, and the other end of the pressure-guiding pipe is connected to the auxiliary air bag (not shown in the figure).

[0059] This embodiment utilizes a first mounting portion provided below the auxiliary airbag and a second mounting portion provided on the housing, along with two rows of fixed mounting holes. The second mounting portion of the housing is then secured to the first mounting portion with lashing ropes, allowing the pressure regulating device integrated into the housing to be mounted on the bottom of the airbag. Simultaneously, one end of the electric valve is connected to the exterior of the first connecting pipe, which extends a certain distance outside the housing. The second connecting pipe, covered with a flexible material, communicates with the interior of the auxiliary airbag. During installation, the second connecting pipe is sleeved over the first connecting pipe and secured with a double clamp. The integrated pressure regulating device, integrated into the housing, is mounted externally and secured with lashing ropes in a cross-shaped pattern, making it easy to assemble and disassemble. If the integrated pressure regulating device malfunctions and requires inspection and repair, the double clamps are loosened, the second connecting pipe is removed, and the second connecting pipe is then secured with lashing ropes to ensure the airbag is leak-proof. The integrated pressure regulating device can then be removed for inspection and repair. This allows for disassembly and repair of the pressure regulating device without disrupting the normal operation of the high-altitude aerostat, effectively improving the reliability and maintainability of the aerostat.

[0060] To further improve the overall sealing performance of the aerostat, in an optional embodiment, the first connecting pipe is led out along the air inlet and air outlet of the box body, and is connected to the second connecting pipe connected to the auxiliary airbag by a snap connection at a position preset distance from the air inlet and air outlet.

[0061] In this embodiment, the housing is positioned externally to the aerostat, for example, at the bottom of the aerostat in the aforementioned embodiment. At high altitude, the housing moves with the floating auxiliary airbag. During this movement, gravity exerts stress on the first connecting tube extending from the housing, thereby affecting the sealing performance of the first connecting tube when connected to the auxiliary airbag. In this embodiment, by positioning the connection between the first and second connecting tubes at a predetermined distance from the housing's inlet and outlet ports, the stress on the first connecting tube caused by the housing's gravity is reduced to a level that does not affect the sealing performance of the first and second connecting tubes, thereby improving the overall sealing performance of the aerostat. In other words, by extending the first connecting tube beyond the housing, the extended first connecting tube alleviates the stress caused by the housing's gravity at the connection point. The predetermined distance is sufficient to ensure that the stress on the first connecting tube during engagement with the second connecting tube does not affect the sealing performance of the connection. In other words, the predetermined distance ensures that the sealing performance of the first and second connecting tubes meets the preset sealing requirements. That is, the preset distance is such that the floating stress borne by the first connecting pipe at the position where it is connected to the second connecting pipe in a clamping manner is less than or equal to the stress threshold that meets the sealing requirement, thereby improving the overall sealing performance of the aerostat.

[0062] In an optional embodiment, the auxiliary airbag includes a plurality of sub-airbags, and the aerostat includes a box body and an air pressure regulating device respectively corresponding to each sub-airbag, and the air pressure regulating device is arranged in the box body.

[0063] In this embodiment, for the multiple sub-airbags of the auxiliary airbag, such as the auxiliary airbag, the tail airbag and the ring wing airbag, as shown in FIG. Figure 2 As shown, the air pressure regulating device for each airbag is integrated and arranged at the bottom position of the corresponding airbag, forming an independent air pressure regulation for each sub-airbag to ensure the shape, rigidity and air pressure of each airbag.

[0064] In another optional embodiment, the auxiliary airbag includes multiple sub-airbags, the airship includes a control console, and a box and an air pressure regulating device corresponding to each sub-airbag respectively, the control console includes a controller and a differential pressure sensor for each air pressure regulating device, and each box includes a fan, an electric valve and a first connecting pipe connecting the fan and the electric valve of the air pressure regulating device.

[0065] In this embodiment, for the multiple sub-airbags of the auxiliary airbag, such as the auxiliary airbag, the tail airbag and the ring wing airbag, a box is set at the bottom position of each sub-airbag, such as Figure 5As shown, the housing 55 contains only the air pressure regulating device's blower 53, electric valve 54, and the first tube portion 51 of the first connecting pipe connecting the two. The second tube portion 52 of the first connecting pipe connects to the second connecting pipe, and the second mounting portion 56 is used to bind the airbag's first mounting portion. The controllers and differential pressure sensors corresponding to each sub-airbag are then integrated into the aerostat's unified control console, enabling centralized control and individual regulation. This embodiment controls the inflation and deflation of each sub-airbag by integrating the electric valve and blower within the housing, along with the centralized controller and differential pressure sensor. This ensures that the pressure of each auxiliary airbag remains within the set pressure range, maintaining the shape and rigidity of each airbag and adapting to changes in the external environment. This embodiment features a compact structure, high pressure, excellent airtightness, easy installation, excellent maintainability, and superior protection. It effectively overcomes issues such as blower flow and static pressure loss, as well as poor sealing and leakage in the pressure regulating device, effectively improving the reliability and maintainability of the aerostat.

[0066] In another optional embodiment, the auxiliary airbag includes a plurality of sub-airbags, the airship includes an air pressure regulating device corresponding to each sub-airbag, the box includes a control sub-box and a regulating sub-box corresponding to each sub-airbag, the control sub-box includes a controller and a pressure difference sensor for each air pressure regulating device, and the regulating sub-box includes a fan, an electric valve and a first connecting pipe for each air pressure regulating device.

[0067] In this embodiment, for the multiple sub-airbags of the auxiliary airbag, such as the auxiliary airbag, the tail airbag and the ring wing airbag, as shown in FIG. Figure 6 As shown, the housing is positioned at the bottom of the aerostat and includes regulating sub-boxes 65, 66, and 67 for each sub-airbag, as well as a unified control sub-box 68. The regulating sub-box integrates only the air pressure regulating device's blower 63, electric valve 64, and the first pipe section 61 of the first connecting pipe connecting the two. The first connecting pipe's second pipe section 62 connects to the corresponding second connecting pipe. The control sub-box 68 includes a control unit 70 that integrates the controllers for each sub-airbag, as well as a differential pressure sensor 71 for each sub-airbag. The control sub-box 68 is connected to the first mounting portion of the aerostat via a second mounting portion 69. This embodiment achieves centralized control of the aerostat's pressure regulation, further improving the ease of installation and maintainability of the aerostat.

[0068] Based on the aerostat of the above embodiment, Figure 7 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.

[0069] The wind power generation system of this embodiment integrates the fan and electric valve of the air pressure regulating device of the auxiliary airbag of the airship into the box, and has the characteristics of compact structure, high pressure, good air tightness, convenient installation, good maintainability, and good protection, which significantly improves the stability and reliability of the wind power generation system installed at high altitude.

[0070] 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, comprising an aerostat and a wind turbine mounted on the aerostat, wherein the aerostat comprises a main airbag, an auxiliary airbag, a box, and an air pressure regulating device for regulating the air pressure of the auxiliary airbag, wherein the air pressure regulating device comprises a controller, a pressure differential sensor, a fan and an electric valve integrated in the box, and a first connecting pipe connecting the fan and the electric valve. The pressure control method comprises:

[0071] The controller controls the electric valve to deflate the auxiliary airbag according to the air pressure of the airbag sensed by the pressure difference sensor, or controls the blower and the electric valve to inflate the auxiliary airbag.

[0072] The pressure control method of this embodiment targets the structural characteristics of the wind power generation system by integrating the fan and electric valve of the air pressure regulating device of the auxiliary airbag of the airship into the box body into an integrated pressure regulating structure. According to the air pressure of the airbag sensed by the pressure difference sensor, the auxiliary airbag is exhausted through the controller and the electric valve integrated in the box body, and the auxiliary airbag is inflated by the fan and electric valve integrated in the box body. The method has the characteristics of compact structure, high pressure, good airtightness, convenient installation, good maintainability, and good protection, thereby compensating for the problems existing in the prior art, significantly improving the stability and reliability of the wind power generation system installed at high altitude, and having practical application value.

[0073] To further improve the effective control of each auxiliary airbag, in an optional embodiment, the controller controls the electric valve to deflate the auxiliary airbag according to the air pressure of the airbag sensed by the pressure differential sensor, or controls the fan and the electric valve to inflate the auxiliary airbag, further comprising:

[0074] If the air pressure in the airbag is greater than a preset first threshold, the controller controls the electric valve to open, and discharges the gas in the auxiliary airbag to deflate it until the air pressure in the airbag is less than or equal to a second threshold;

[0075] If the air pressure in the airbag is less than a preset third threshold, the controller starts the blower, controls the electric valve to open, introduces ambient air and inflates the auxiliary airbag until the air pressure in the airbag is greater than or equal to a fourth threshold.

[0076] 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 and low-pressure thresholds, respectively.

[0077] When the air pressure in the bag is greater than the maximum high-pressure threshold, it indicates that the corresponding auxiliary airbag needs to be exhausted to reduce the air pressure inside the bag. At this time, the controller opens the electric valve to discharge the gas in the auxiliary airbag for deflation, and at the same time 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 high-pressure threshold, it will no longer be deflated and the electric valve will be closed at the same time.

[0078] Similarly, when the air pressure in the bag is lower than the minimum low-pressure threshold, it indicates that the corresponding auxiliary airbag needs to be inflated to increase the air pressure inside the bag. At this time, the controller first turns on the fan and then opens the electric valve to inflate the auxiliary airbag, while detecting 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 electric valve will be closed first and then the fan.

[0079] This embodiment pre-sets the air pressure thresholds for different airbags, compares the air pressure of the airbag sensed by the differential pressure sensor with the air pressure threshold through a controller, and inflates or deflates the airbags according to different situations through an integrated fan and electric valve integrated in the box. That is, this embodiment uses an electric valve and fan that are integrally connected and set in the box, and controls the inflation or deflation of each auxiliary airbag through the controller of the pressure regulating device, ensuring that the pressure of the auxiliary airbag is always maintained within the set pressure range, maintaining the shape and rigidity of each airbag to adapt to changes in the external environment. This embodiment has the characteristics of compact structure, high pressure, good airtightness, convenient installation, good maintainability, and good protection. It can effectively overcome the problems of fan flow and static pressure loss, as well as the problems of poor sealing performance and rapid leakage of the pressure regulating device.

[0080] In response to the current existing problems, the present invention develops an airship, a wind power generation system and a control method with an integrated pressure regulation structure. By integrating the fan and the electric valve of the air pressure regulating device of the auxiliary airbag of the airship into the box, the system has the characteristics of compact structure, high pressure, good airtightness, convenient installation, good maintainability and good protection, thereby compensating for the problems existing in the prior art, significantly improving the stability and reliability of the airship set at high altitude, and having practical application value.

[0081] 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 an integrated pressure regulating structure, characterized in that: The invention comprises an auxiliary airbag, a box body arranged outside the auxiliary airbag, and an air pressure regulating device for regulating the air pressure of the auxiliary airbag, wherein: The air pressure regulating device includes a controller, a pressure differential sensor, a blower and an electric valve integrated in the housing, and a first connecting pipe connecting the blower and the electric valve. The controller is used to control the electric valve to deflate the auxiliary airbag or control the blower and the electric valve to inflate the auxiliary airbag according to the air pressure in the airbag sensed by the pressure differential sensor. The differential pressure sensor and the controller are arranged in the box, and the differential pressure sensor includes a first end and a second end, the first end is used to collect the ambient air pressure, and the second end is used to collect the air pressure of the auxiliary airbag; The box includes a first box and a second box that are isolated from each other. The first box includes an air inlet and an air outlet, a fan, an electric valve, a first connecting pipe, and a controller; The second box includes the pressure difference sensor and the communicating air port; The electric valve is a butterfly valve or a ball valve driven by a DC motor; The first connecting tube is a heat shrinkable tube with an adhesive layer, the thickness of the adhesive layer is greater than or equal to 0.8 mm and less than or equal to 1.2 mm, and the wall thickness of the heat shrinkable tube is greater than or equal to 2.75 mm and less than or equal to 3.25 mm; The box is installed at the bottom of the auxiliary airbag, the auxiliary airbag includes a first mounting portion connected to the box, and the box includes a second mounting portion corresponding to the first mounting portion. The first mounting portion includes a plurality of first mounting holes; The second mounting portion includes a plurality of second mounting holes corresponding to the first mounting holes; The aerostat uses a binding rope to sequentially pass through each first mounting hole and the second mounting hole in a cross manner to fix the box.

2. The aerostat according to claim 1, wherein: The first communicating pipe is led out along the air inlet and air outlet of the box body, and is connected to the second communicating pipe communicating with the auxiliary airbag at a position preset distance away from the air inlet and air outlet by means of a snap connection.

3. The aerostat according to claim 1, wherein: The auxiliary airbag includes a plurality of sub-airbags. The aerostat comprises a box body and an air pressure regulating device respectively corresponding to each sub-airbag, and the air pressure regulating device is arranged in the box body.

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 pressure control method applied to a wind power generation system according to claim 4, characterized in that: include: The controller controls the electric valve to deflate the auxiliary airbag according to the air pressure of the airbag sensed by the pressure difference sensor, or controls the fan and the electric valve to inflate the auxiliary airbag.

6. The pressure control method according to claim 5, characterized in that: The controller controls the electric valve to deflate the auxiliary airbag according to the air pressure of the airbag sensed by the pressure difference sensor, or controls the fan and the electric valve to inflate the auxiliary airbag, further comprising: If the air pressure in the airbag is greater than a preset first threshold, the controller controls the electric valve to open, and discharges the gas in the auxiliary airbag to deflate it until the air pressure in the airbag is less than or equal to a second threshold; If the air pressure in the airbag is less than a preset third threshold, the controller starts the blower, controls the electric valve to open, introduces ambient air and inflates the auxiliary airbag until the air pressure in the airbag is greater than or equal to a fourth threshold.

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