Wind power plant and control method

Abstract

The application discloses a wind power generation device and a control method. The device comprises: a ventilation pipeline arranged in a hollow brick of a building wall, forming a through air duct in adjacent hollow bricks for collecting and transporting natural wind; a wind power generator assembly unit arranged in the ventilation pipeline and composed of multiple blade units, a coaxial transmission device and a gearbox; each blade unit is connected to a corresponding sleeve of the coaxial transmission device; and each sleeve is connected to the gearbox through a terminal sawtooth. The method comprises: collecting wind speed data of the area where each wind power generator assembly unit is arranged in the ventilation pipeline; when the area wind speed V reaches a minimum power generation wind speed V1 and is lower than a maximum bearing wind speed V2, the blade rotating speed of the wind power generator assembly unit is controlled by a power signal feedback method to obtain maximum wind energy; when the area wind speed exceeds the maximum bearing wind speed V2, the blade rotating speed of the previous wind power generator assembly unit is adjusted to the maximum bearing wind speed V2, so that the area wind speed V is reduced to below the maximum bearing wind speed V2.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wind power generation technology, in particular to a wind power generation device and a control method. BACKGROUND

[0002] Wind power generation occupies an increasingly important position in the energy structure of our country. In the face of the increasingly serious environmental pollution and greenhouse gas emissions caused by fossil energy, wind power generation has developed rapidly. Our country is rich in wind energy resources, but the distribution is extremely uneven. Wind power development is mostly concentrated in the northeast, north and northwest regions, far from the densely populated and highest power load eastern regions. Looking at the development trend of the wind power industry, it is the trend of the times to build wind power generation devices in cities. Large wind turbine generators have long blades, which sweep a large area, leading to bird ecological damage. When extreme winds occur, although the wind turbine is in a shutdown state, due to the limited bending moment, torque, shear strength and extrusion strength that the root of the blade can withstand, the entire blade may fly out, causing personnel casualties and building damage on the road. Blade surface corrosion, lightning strikes, cracks, and icing are all prone to cause blade fractures and accidents. Large wind turbine generators occupy a large area and rotate for a long time in densely populated areas, which can cause dizziness. The large volume of large wind turbine generators also produces thickness noise, load noise and pulse noise when the blades rotate.

[0003] Based on the above reasons, it is not realistic to build large wind turbine generators in cities. Small wind turbines are currently commonly used in combination with photovoltaic panels to power streetlights and other facilities, and the power supply capacity needs to be improved. There are also small wind turbine generators designed outside the walls of high-rise buildings in the prior art. Chinese patent application CN203035458U utilizes the air convection generated at the top and bottom of a high-rise building to provide a ducted wind turbine. The small wind turbine is installed on the outside of the wall body through a fixing frame, and a wind power enhancement cover is installed below the wind turbine. The wind turbine is connected to an energy storage device. This scheme enhances the hot air flow at the top and bottom of the high-rise building through the wind power enhancement cover to drive the wind turbine to generate electricity, and the energy is stored in the energy storage device for use inside the building.

[0004] Due to the low wind energy utilization rate and the high safety risk outside the wall, there is an urgent need for a small wind turbine generator in the building wall to generate electricity and power the electrical equipment inside the building, reducing the construction and loss of large power grid transmission and distribution networks, and improving the wind energy utilization rate in cities.

[0005] The information disclosed in this BACKGROUND section is only intended to increase an understanding of the general context in which the present application can be practiced. It should not be taken as an acknowledgement that this information forms a prior art that was known to those skilled in the art, before the filing date of the application. SUMMARY

[0006] The present application aims to provide a wind power generation device, which realizes effective power supply by means of the space in the wall and greatly reduces the cost of the generator set.

[0007] Another object of the present application is to provide a control method of the wind power generation device, which realizes the maximization of wind energy utilization.

[0008] To achieve the above object, according to the first aspect of the present application, the present application provides a wind power generation device, comprising: a ventilation duct arranged in the hollow brick of the building wall, forming a through wind channel in the adjacent hollow bricks for collecting and conveying natural wind; a wind power generator assembly unit arranged in the ventilation duct and composed of a plurality of blade units, a coaxial transmission device and a gearbox; each blade unit is connected to the corresponding sleeve of the coaxial transmission device; each sleeve is connected to the gearbox through the end serration.

[0009] Further, in the above technical solution, the sleeve can be a coaxially sealed hollow pipe, and the number of hollow pipes matches the number of blade units.

[0010] Further, in the above technical solution, the gap between the hollow pipes that are mutually sleeved is filled with a liquid for lubrication and heat dissipation, and dynamic sealing members are arranged at both ends of the gap.

[0011] Further, in the above technical solution, the support and relative rotation between the innermost hollow pipe and the center shaft and between the adjacent hollow pipes are formed by the ball bearings and the corresponding annular grooves.

[0012] Further, in the above technical solution, the hollow bricks and the ventilation duct are filled with light steel keels and hard soundproof asbestos for shock absorption and noise reduction.

[0013] Further, in the above technical solution, the material of the ventilation duct can be metal, plastic, glass steel or composite material; the ventilation duct is coated with polyurethane or epoxy resin for corrosion protection.

[0014] Further, in the above technical solution, the wind power generator assembly unit can be multiple and arranged in the through wind channel in sequence.

[0015] Further, in the above technical solution, the number of blade units can be two or three; the swept cross-sectional diameter of the blades on each blade unit is smaller than the cross-sectional diameter of the ventilation duct.

[0016] Further, in the above technical solution, the wind power generation device can be installed in the wall of a high-rise building of 10 floors or more.

[0017] According to the second aspect of the present application, the present application provides a wind power generation control method for controlling the aforementioned wind power generator assembly unit, comprising the following steps: A, collecting the wind speed data of the area where each wind power generator assembly unit arranged in sequence in the ventilation duct is located; B, when the area wind speed V reaches the minimum power generation wind speed V1 and is lower than the maximum bearing wind speed V2, the blade rotating speed of the wind power generator assembly unit is controlled by the power signal feedback method to obtain the maximum wind energy; C, when the area wind speed exceeds the maximum bearing wind speed V2, the blade rotating speed of the previous wind power generator assembly unit is adjusted to the maximum bearing wind speed V2, so as to reduce the area wind speed V to below the maximum bearing wind speed V2.

[0018] Further, in the above technical solution, after step C, it can further comprise: when the area wind speed V is less than a certain threshold value after a preset time, the blade rotating speed of the previous wind power generator assembly unit is adjusted to below the maximum bearing wind speed V2, and the maximum wind energy at the previous wind power generator assembly unit is obtained by the power signal feedback method; otherwise, the blade of the previous wind power generator assembly unit continues to run at the maximum bearing wind speed V2.

[0019] Further, in the above technical solution, the threshold value can be preset to 70% to 80% of the maximum bearing wind speed V2.

[0020] Compared with the prior art, the present application has the following beneficial effects:

[0021] 1) The present application can generate wind power in the wall of a high-rise building, and the wind power generator assembly unit is arranged in the ventilation duct in the hollow brick wall, which not only does not occupy the use space of the building facade, but also can fully capture wind energy, so that the power generation capacity achieves an optimal value, and the basic electrical facilities in the building can be effectively powered;

[0022] 2) The wind power generation device of the present application is provided with multiple blade units in the same wind power generator assembly unit and is independently driven, which not only can reduce the number of generators and thus reduce the cost, but also can reduce the lateral force resistance borne by the support structure and the failure rate of the wind power generation device and the harm of its own vibration to other facilities by setting multiple blade units in the same wind power generator assembly unit, and the cost and replacement cost of a single blade unit are lower than those of a conventional large wind power generator, which can effectively improve the economy of wind power generation of the present application;

[0023] 3) The control method of the present application can obtain the maximum wind energy and achieve the optimal power generation capacity by adjusting the blade rotating speed according to the principle of the power signal feedback method. By adjusting the blade rotating speed of the previous wind power generator assembly unit to reduce the wind speed at the area of the present wind power generator assembly unit, the area wind speed can be reduced to below the maximum bearing wind speed value, so that the wind energy can be fully utilized and the power generation efficiency can be improved.

[0024] 4) After the wind speed in the unit area of the wind power assembly is reduced and the wind power assembly is working normally, in order to further improve the economy of the previous wind power assembly unit and reduce the security risks, the blade rotating speed of the previous wind power assembly unit can be adjusted by further judging the wind speed threshold, so that the blade rotating speed is normally operated between the minimum power generation wind speed V1 and the maximum wind speed V2.

[0025] 5) In combination with the structural design of the coaxial hollow pipe of the application, the three blade units in the same wind power assembly unit can be individually adjusted, but only one blade speed data needs to be collected to adjust the three blades, which can effectively improve the data collection efficiency.

[0026] The above description is only a summary of the technical solutions of the application. In order to more clearly understand the technical means of the application and can be implemented according to the content of the specification, at the same time, in order to make the above and other purposes, technical features and advantages of the application more easily understood, one or more preferred embodiments are listed as follows, and the details are described as follows with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a schematic diagram of the ventilation duct structure in the wind power generation device of the application (showing the ventilation duct in the single monomer outer wall hollow brick).

[0028] Figure 2 It is a schematic diagram of the ventilation duct structure in the wind power generation device of the application (showing the ventilation duct through the arrangement of multiple outer wall hollow bricks).

[0029] Figure 3 It is a schematic diagram of the structure of the wind power assembly unit in the wind power generation device of the application.

[0030] Figure 4 It is a schematic diagram of the internal structure of the coaxial transmission device in the wind power assembly unit of the application.

[0031] Figure 5 It is a schematic diagram of the flow of the control method of the wind power generation device of the application.

[0032] MAIN REFERENCE SIGN DESCRIPTION:

[0033] 1-outer wall hollow brick, 2-ventilation duct, 3-shock absorption and noise reduction filler, 4-duct coating, 5-wind power assembly unit, 51A-first blade unit, 51B-second blade unit, 52-coaxial transmission device, 52A-first hollow pipe, 52B-second hollow pipe, 52C-center shaft, 520-rolling ball, 521-annular groove, 522-lubricating liquid, 523-moving sealing element, 524-sawtooth, 53-speed changer, 54-fixing device. DETAILED DESCRIPTION

[0034] The specific embodiments of the present application will be described in detail below with reference to the drawings, but the scope of the present application is not limited to the specific embodiments.

[0035] Unless otherwise clearly indicated, throughout the description, the word "comprise" and variations such as "comprises" or "comprising" will be understood to imply the inclusion of a stated element or group of elements but not the exclusion of any other element or group of elements.

[0036] In this document, spatially relative terms, such as "beneath", "below", "lower", "above", "upper", and the like, can be used to describe one element's or feature's relationship to another element or feature as illustrated in the figures. The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0037] In this document, the terms "first", "second", etc. are used to distinguish between two different elements or components, and are not used to define a particular position or relative relationship. In other words, the terms "first", "second", etc. can be interchanged with each other in some embodiments.

[0038] Example 1

[0039] As Figures 1 to 4 shown, the wind power generation device of the present application comprises a ventilation duct 2 and a wind turbine assembly unit 5 (i.e. a group of wind turbine generators). Referring to Figure 1 , the ventilation duct 2 is arranged in the hollow brick 1 of the outer wall of the building wall, further referring to Figure 2, the outer wall hollow brick 1 is arranged according to certain rules (that is, in the same direction) to form a through air duct in adjacent hollow bricks, which is used for collecting and conveying natural wind. The opening facing the outer side of the wall serves as an air inlet, and the through air duct inside the wall is used for installing a wind power assembly unit 5. In order to ensure sufficient power generation, preferably but not limitedly, the wind power assembly unit 5 can be multiple and arranged in sequence in the through air duct. The wind power assembly unit 5 is used to convert the kinetic energy of natural wind entering the ventilation duct into mechanical energy, and then into electrical energy. The wind power assembly unit 5 is composed of multiple blade units, a coaxial transmission device 52 and a gearbox 53, each blade unit is connected to the corresponding sleeve of the coaxial transmission device 52, and the blade unit and the sleeve can be connected in a fixed manner or a detachable manner. Each sleeve is connected to the gearbox 53 through a sawtooth at the end or other similar structure, and the rotation of the blade drives the sleeve to rotate, converting wind energy into mechanical energy, and then obtaining the required rotating speed of the generator rotor through the gearbox to generate electricity.

[0040] Further as shown in Figure 1 , due to the seismic requirements of high-rise buildings, the outer wall hollow brick 1 and the ventilation duct 2 can be filled with materials for shock absorption and noise reduction, preferably but not limitedly, the shock absorption and noise reduction materials can be selected as light steel keels filled with hard sound insulation asbestos. The material of the ventilation duct 2 can be selected as metal, plastic, glass steel or composite material, and the inner wall of the duct can be coated with a corrosion-resistant coating, which can use polyurethane or epoxy resin material.

[0041] Further as shown in Figure 3 , each blade unit of the present application is composed of three blades, and the number of blade units of a complete structure of a wind power assembly unit (as shown in Figure 3 ) can be multiple, preferably two or three (as shown in Figure 3 , two, that is, the first blade unit 51A and the second blade unit 51B). The blade sweeping cross-sectional diameter on each blade unit is slightly smaller than the cross-sectional diameter of the ventilation duct 2, so as to ensure that the blade can rotate smoothly on the basis of utilizing wind energy to the maximum extent. Preferably but not limitedly, the corresponding sleeve connecting each blade unit can adopt a coaxial sealed hollow pipe (that is, Figure 3The number of hollow pipes is matched with the number of blade units (i.e. in the embodiment, the first blade unit 51A is connected to the first hollow pipe 52A, and the second blade unit 51B is connected to the second hollow pipe 52B). If the number of blade units is increased, the number of sleeve-connected hollow pipes is correspondingly increased. The arrangement of multiple blade units in one wind power assembly unit and independent transmission has the following beneficial effects: first, the number of generators can be reduced to reduce the cost; second, by arranging multiple blade units in one wind power assembly unit, the turning direction of each group of blade units depends on the blade structure and installation mode, which can reduce the lateral force resistance borne by the support structure, reduce the failure rate of the wind power generation device and the damage of its own vibration to other facilities; third, if a single group of blade units is damaged, the cost and replacement cost of the blade are lower than those of conventional large wind turbines, which can effectively improve the economy of the wind power generation of the present application.

[0042] Further as shown in Figure 4 The first hollow pipe 52A is sleeved on the center shaft 52C, the center shaft 52C is fixed in the ventilation pipe 2 through the fixing device 54 at both ends, and the gap formed after the first hollow pipe 52A is sleeved on the center shaft 52C can be filled with a liquid for lubrication and heat dissipation (i.e. lubricating liquid 522). Since the hollow pipe and the center shaft 52C will rotate relative to each other, dynamic seals 523 are used to seal the gap at both ends. Similarly, the second hollow pipe 52B is sleeved on the first hollow pipe 52A, and the gap formed between the two can also be filled with lubricating liquid 522, and dynamic seals 523 are also used to seal the gap at both ends. Further, the first hollow pipe 52A and the center shaft 52C, and the first hollow pipe 52A and the second hollow pipe 52B (i.e. at the gap) are each provided with annular grooves 521 arranged at uniform intervals, and the annular grooves are provided with balls 520, which form a mutual support of the sleeve structure through the balls and the corresponding annular grooves, and can ensure the free rotation between the hollow pipes and the center shaft and between the hollow pipes.

[0043] Example 2

[0044] Embodiment 2 is a specific example of the technical solution of Embodiment 1: the wind power assembly unit 5 of Embodiment 1 is installed above the 10th floor of a high-rise building. The size of the hollow brick of the outer wall is 50x50x50 cm. The cross-sectional diameter of the ventilation duct is 24 cm, and the ventilation duct is made of metal material. The filler between the hollow brick and the ventilation duct is a small grid made of steel keel and then hard soundproof asbestos is added. The coating on the inner wall of the duct is polyurethane material. When the brick is laid, the ventilation duct is aligned, the cement used for fixing cannot affect the ventilation of the duct, and the wind power assembly unit 5 of the application is installed and fixed at the same time. Each group of wind power assembly units connects two adjacent speed changers. The cross-sectional diameter swept by each group of blades is slightly smaller than the cross-sectional diameter of the ventilation duct, and the blades are detachably connected with the hollow pipe for easy cleaning, maintenance and replacement. The windward surface is designed to have small wind resistance, which can slightly affect the air flow quality of the ventilation duct. The flow rate of the wind flowing through the blade unit and the speed changer will inevitably decrease, but since each hollow brick can collect natural wind, it will not affect the normal work of the next group of wind power assembly units, ensuring the feasibility of the facility.

[0045] Example 3

[0046] This embodiment is a control method for the wind power generation device of Embodiment 1. The control method controls the device of Embodiment 1 according to the principle of power signal feedback method, captures the maximum wind energy by controlling the rotating speed of the blades of the wind power assembly unit, and thus realizes the optimal power generation. This embodiment takes two wind power assembly units arranged in the ventilation duct in sequence and each containing three blade units as an example for illustration, i.e. the first blade unit 51A, the second blade unit 51B and the third blade unit 51C (not shown in the figure). Figure 3

[0047] The principle of the power signal feedback method is as follows:

[0048] Firstly, the calculation formula of the mechanical power generated by the wind turbine is: P=0.5C p ρsV 3 ; since this embodiment adopts three blade units to output power respectively, the existing formula can be expressed as (taking the mechanical power generated by the second blade unit 51B as an example):

[0049] P=1 / 6C p ρsV 3 formula (1);

[0050] C p in formula (1) is the wind energy utilization coefficient, ρ is the air density, s is the blade swept area, and V is the wind speed. The tip speed ratio λ of the blade and the blade pitch angle control the size of the wind energy utilization coefficient C p . ​

[0051] Tip speed ratio λ = ωR / V equation (2);

[0052] The mechanical angular velocity of the blade in equation (2), R is the blade radius.

[0053] The wind power assembly unit (i.e. wind turbine) in the embodiment has no pitch and yaw functions. Since the wind power assembly unit has a certain structure and model, its characteristic curve can express the functional relationship between C p and λ. The tip speed ratio λ determines the wind energy utilization coefficient C p , and further determines the electrical energy output by the second blade unit 51B. Since the power obtained by the wind power assembly unit is related to the wind energy utilization coefficient C p , if the maximum output power is desired, the wind power assembly unit can be operated at C pmax . According to the characteristic curve, when the wind speed at which the wind power assembly unit operates is less than the rated wind speed (i.e. the maximum withstand wind speed), the blade speed is adjusted so that the tip speed ratio λ reaches the optimal value. Then the wind power assembly unit can output the maximum mechanical power. When the wind speed changes, in order to keep the tip speed ratio at the optimal value, the blade speed needs to be continuously adjusted. When the wind power assembly unit is at the optimal tip speed ratio and also has the maximum wind energy utilization coefficient C pmax , the maximum output mechanical power can be obtained, and the optimal power generation amount is achieved.

[0054] For the three blade units of the embodiment, after the rotational speed ω B of the second blade unit 51B is obtained, the corresponding maximum output power P max is calculated according to the maximum power curve of the wind power assembly unit. The maximum output power P bmax =1 / 3P max is defined as the reference value of the output power, which is compared with 1 / 3 of the actual output power P. According to the deviation generated by the comparison, the rotational speed of the blade is adjusted, so that the control effect of maximum power tracking is achieved, and the maximum output power P bmax is obtained. According to the rotational speed ω B of the second blade unit 51B, the rotational speed ω A of the first blade unit 51A and the rotational speed ω C of the third blade unit 51C can be determined, i.e. ω A =k BA ω B , ω C =k BC ω B , where k BA , k BC are constants, and k BA +k BC=2. Therefore, three blade units can be individually speed-regulated, but only one blade speed data is needed to regulate the three blades.

[0055] The control principle of the embodiment is described above, and the specific control method is described in detail below.

[0056] The wind power generation control method of the embodiment is used to control the wind power assembly units of Embodiment 1, each of which is arranged in sequence (in a similar series mode) in the ventilation duct. The control method comprises the following steps:

[0057] In step S101, the data collection and detection module collects the wind speed data of the area where each wind power assembly unit arranged in sequence in the ventilation duct is located. For ease of description, taking one wind power assembly unit as an example, the wind power assembly unit is referred to as “the wind power assembly unit”.

[0058] After receiving the aforementioned wind speed data, the data processing module determines whether the wind speed value reaches the minimum wind speed value that can generate electricity. If yes, step S102 is performed; if no, step S103 is performed, i.e., the blades of the wind power assembly unit are parked and do not work.

[0059] In step S102, the wind power assembly unit normally works according to the power signal feedback control strategy. Specifically, when the regional wind speed V reaches the minimum power generation wind speed V1 and is lower than the maximum bearing wind speed V2, the blade speed of the wind power assembly unit is controlled by the power signal feedback method to obtain the maximum wind energy. Specifically, the external SCADA system interface sends remote parameter control data to the PLC controller, and the PLC controller adjusts the blade speed so that the tip speed ratio λ reaches the optimal value. At this time, the wind power assembly unit can output the maximum mechanical power. Since the wind speed changes in real time, in order to keep the tip speed ratio always optimal, only the blade speed needs to be continuously adjusted. When the wind power assembly unit is at the optimal tip speed ratio and also obtains the maximum wind energy utilization coefficient C pmax (according to the characteristic curve), the maximum output mechanical power can be obtained, and the optimal power generation amount is realized.

[0060] After receiving the real-time wind speed data, the data processing module determines whether the wind speed at the wind power assembly unit is greater than the maximum bearing wind speed value. If yes, step S104 is performed; if no, step S105 is performed, i.e., the blades of the wind power assembly unit continue to work.

[0061] Step S104, when the data processing module determines that the regional wind speed exceeds the maximum bearing wind speed V2, the PLC controller adjusts the blade rotating speed of the previous wind power assembly unit to the maximum bearing wind speed V2, so as to reduce the regional wind speed V. It should be noted that, since the wind power assembly unit of the present application is installed in a narrow ventilation duct, and the cross-sectional area swept by the blade is basically equal to the cross-sectional area of the ventilation duct, only in this application scenario, changing the blade rotating speed of the previous wind power assembly unit can change the regional wind speed V.

[0062] After receiving the real-time wind speed data, the data processing module determines whether the wind speed at the present wind power assembly unit is reduced to below the maximum bearing wind speed value. If yes, step S106 is executed; if no, step S107 is executed, i.e. the blades of the present wind power assembly unit are stopped and do not work.

[0063] Step S106, the present wind power assembly unit continues to work according to the power signal feedback control strategy.

[0064] Considering that after step S106 is executed, the blade rotating speed of the previous wind power assembly unit will always remain at the maximum bearing wind speed V2, which is neither economical nor safe, the present embodiment adjusts and optimizes by setting a threshold value in this case, i.e. further determines whether the wind speed at the present wind power assembly unit is less than the threshold value. Preferably but not limitatively, the threshold value is 70% to 80% of the maximum bearing wind speed V2. If yes, step S108 is executed; if no, step S109 is executed, i.e. the blades of the previous wind power assembly unit continue to run at the rotating speed of the maximum bearing wind speed.

[0065] Step S108, when the data processing unit determines that the regional wind speed V is less than the threshold value after a period of pre-set time (which can be set according to actual needs), the blade rotating speed of the previous wind power assembly unit is adjusted to below the maximum bearing wind speed V2, and the maximum wind energy at the previous wind power assembly unit is obtained by the power signal feedback method.

[0066] The embodiment obtains maximum wind energy and realizes optimal power generation by adjusting the blade rotating speed according to the principle of power signal feedback method. By adjusting the blade rotating speed of the previous wind power assembly unit to reduce the wind speed at the region of the present wind power assembly unit, the wind speed at the region is reduced to below the maximum bearing wind speed value, so that the wind energy can be fully utilized and the power generation efficiency is improved. After the wind speed at the region of the present wind power assembly unit is reduced and the present wind power assembly unit is normally operated, in order to further improve the economy of the previous wind power assembly unit and reduce the safety hidden trouble, the blade rotating speed of the previous wind power assembly unit is adjusted back by further judgment of the wind speed threshold, so that the blade rotating speed of the previous wind power assembly unit is normally operated between the minimum power generation wind speed V1 and the maximum bearing wind speed V2. In addition, in combination with the structure design of the coaxial hollow pipe in the aforementioned embodiment 1, the three blade units in the same wind power assembly unit can be individually speed-regulated, but only the speed data of one blade is collected to regulate the speed of the three blades, so that the data collection efficiency is effectively improved.

[0067] The foregoing description of specific exemplary embodiments of the application is presented for the purpose of illustration and description. It is not intended to be a limitation on the present application, as described herein. Many changes and modifications can be made to the exemplary embodiments described above, in light of the above teachings. It is therefore contemplated that, within the scope of the application, that changes and modifications can be made by those of ordinary skill in the art. The exemplary embodiments were chosen and described in order to explain the principles of the application and its practical application, thereby enabling others skilled in the art to understand the application for various embodiments and with various modifications that are suited to the particular use contemplated. Any simple modifications, equivalent changes, and modifications obvious from the foregoing description are intended to be included within the scope of the present application.

Claims

1. A wind power generation device, characterized in that, Installed in the walls of high-rise buildings above the 10th floor, including: Ventilation ducts are installed inside hollow bricks in the building walls to form air ducts that run through adjacent hollow bricks, used to collect and transport natural air. A wind turbine assembly unit is disposed within the ventilation duct and consists of multiple blade units, a coaxial drive device, and a gearbox; each blade unit is connected to a corresponding sleeve of the coaxial drive device; each sleeve is connected to the gearbox via end serrations; there are multiple wind turbine assembly units arranged sequentially within the through-duct; the cross-sectional diameter of the swept blades on each blade unit is smaller than the cross-sectional diameter of the ventilation duct. The sleeve of the coaxial transmission device is a coaxial sealed hollow tube, and the number of hollow tubes matches the number of blade units; the gap between the interlocking hollow tubes is filled with liquid for lubrication and heat dissipation, and dynamic seals are provided at both ends of the gap; the innermost hollow tube and the central shaft, as well as adjacent hollow tubes, are supported and rotate relative to each other through ball bearings and corresponding annular grooves. A control unit is used to control the wind turbine assembly unit, and the control method includes the following steps: A. Collect wind speed data for the area where each wind turbine component unit is located in the ventilation duct; B. When the wind speed V in the area reaches the minimum power generation wind speed V1 and is lower than the maximum withstand wind speed V2, the blade speed of the wind turbine component unit is controlled by the power signal feedback method to obtain the maximum wind energy. C. When the wind speed in the area exceeds the maximum wind speed V2, the blade speed of the previous wind turbine component unit is adjusted to the maximum wind speed V2, thereby reducing the wind speed V in the area to below the maximum wind speed V2. After step C, when the regional wind speed V falls below a certain threshold after a preset time, the blade rotation speed of the previous wind turbine unit is adjusted to below the maximum withstand wind speed V2, and the maximum wind energy at the previous wind turbine unit is obtained through the power signal feedback method; otherwise, The blades of the previous wind turbine unit remain in operation at the maximum wind speed V2.

2. The wind power generation device according to claim 1, characterized in that, The hollow bricks and ventilation ducts are filled with light steel keel for shock absorption and noise reduction, and rigid sound-insulating asbestos.

3. The wind power generation device according to claim 1, characterized in that, The ventilation duct is made of metal, plastic, fiberglass, or composite material; the inside of the ventilation duct is coated with polyurethane or epoxy resin for corrosion protection.

4. The wind power generation device according to claim 1, characterized in that, The threshold is 70% to 80% of the maximum withstand wind speed V2.

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