Cluster-arranged vertical-axis micro-wind power generation network system

Abstract

The present invention relates to the technical field of micro-wind generators, and discloses a vertical-axis micro-wind power generation network system with a cluster layout, which includes a generator module and a micro-wind detection module; the generator module includes micro-wind generators arranged in a cluster; the micro-wind generator includes a vertical-axis wind turbine and a generator; the vertical-axis wind turbine includes a wind wheel, a strategy unit, and a control unit; the wind wheel includes a central shaft and a blade group; the blade group includes two blades; the blade includes a convex surface and a concave surface; a first flow guide plate is arranged on the convex surface, and a second flow guide plate is arranged on the concave surface; the micro-wind detection module includes a micro-wind sensor for detecting the wind speed and the wind direction angle; the strategy unit formulates a control strategy; the control unit controls the opening angles of the first flow guide plate and the second flow guide plate and the effective radius of the wind wheel; the present invention realizes integrated power generation in a micro-wind environment, enhances the system stability, and improves the wind energy utilization rate.

Description

Technical Field

[0001] The present invention relates to the technical field of micro-wind generators, and particularly to a vertical-axis micro-wind power generation network system with a cluster layout. Background Art

[0002] A vertical-axis micro-wind power generation network system with a cluster layout is a power generation system in which multiple vertical-axis wind turbines are arranged in a cluster in the same area and work together. By integrating multiple wind turbines, this system can effectively improve the overall power generation efficiency, while reducing the operating cost and maintenance difficulty of a single generator. However, there are some deficiencies and challenges in the actual application process of the vertical-axis micro-wind power generation network system with a cluster layout.

[0003] Low wind energy utilization rate is an important reason restricting the development of vertical-axis wind turbines. In a vertical-axis micro-wind power generation network system with a cluster layout, each wind turbine needs to adjust its working parameters according to the real-time wind speed and wind direction angle. This requires the formulation of complex control strategies and the installation of high-precision sensors and controllers. However, due to the uncertainty and complexity of the changes in wind speed and wind direction, the formulation and implementation of control strategies face great challenges. The low speed of the micro-wind means that its kinetic energy is small, so it is more vulnerable to external factors (such as terrain, temperature difference, etc.). These factors will cause the changes in wind speed and wind direction to be more frequent and intense, thus affecting the operating efficiency and stability of the wind turbine.

[0004] For example, the Chinese patent application with the authorization announcement number CN114198260B discloses a high-efficiency vertical-axis switched reluctance micro-wind generator, which mainly includes: an improved Savonius wind wheel, a Darrieus wind wheel, an improved Savonius wind wheel shaft servo drive system, and a switched reluctance generator. Among them, the double-layer improved Savonius wind wheel can change the expanded or closed state of the wind wheel according to the magnitude of the real-time wind speed, so as to ensure that under the excellent starting performance of the switched reluctance generator itself, it can have a larger starting torque, and greatly reduce the wind resistance brought by the traditional Savonius wind wheel when the wind speed is large, realizing high-efficiency micro-wind power generation. The high-efficiency vertical-axis switched reluctance micro-wind generator proposes a rotatable double-layer improved Savonius wind wheel, which has a simple structure, is easy to implement, and has high reliability, and is suitable for medium and small-scale distributed micro-wind power generation occasions.

[0005] As disclosed in the patent application with the publication number CN102220937A, a vertical-axis magnetic levitation wind turbine with the functions of starting in gentle breeze and lightning protection is provided, which includes a vertical axis, a disc-shaped housing composed of an upper shell cover, a short-axis cylindrical outer shell in the middle, and a lower shell cover, a stator, an outer rotor, and a load-bearing flange arranged at the bottom end of the vertical axis. There is an S-shaped air duct made of more than two semi-circular metal sheets, with upper and lower sections or four sections and openings at both the upper and lower parts. The S-shaped air duct is arranged on the vertical axis; a lightning rod ball is provided at the top end of the vertical axis. The root of the lightning rod ball is connected to the whole fan, and a grounding electrode is made underground. Rotating around the vertical axis, the whole fan faces downward, with no friction and no resistance between them. As long as there is a gentle breeze in any wind direction, the fan can be rotated, thereby generating electricity, and the operation is stable, without jitter and without noise. When lightning strikes, the lightning rod ball directly diverts the strong current formed by the lightning strike to the ground to avoid the risk of the wind turbine being struck by lightning and ensure the normal use of the wind power system.

[0006] The above patents all have the problems raised in this background technology: Due to the uncertainty and complexity of the changes in wind speed and wind direction, there are great challenges in the formulation and implementation of control strategies.

[0007] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as an admission or any form of implication that this information constitutes the prior art already known to those of ordinary skill in the art. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to overcome the defects of the prior art, and provide a vertical-axis gentle breeze power generation network system with a cluster layout, realizing integrated power generation in a gentle breeze environment, enhancing the system stability, and improving the wind energy utilization rate.

[0009] To solve the above technical problems, the present invention provides the following technical solutions:

[0010] A vertical-axis gentle breeze power generation network system with a cluster layout includes a generator module and a gentle breeze detection module; the generator module includes M gentle breeze generators arranged in a cluster, where M is a positive integer; among them, any one gentle breeze generator includes a vertical-axis wind turbine and a generator.

[0011] Any one vertical-axis wind turbine includes a wind wheel, a strategy unit, and a control unit; the wind wheel includes a central axis and N blade groups, where N is a positive integer; among them, the blade groups are used to capture wind energy and generate mechanical energy through rotation; the central axis is used to fix the blade groups and transfer the mechanical energy generated by the rotation of the blade groups to the generator; the central axis includes a fixed shaft and a rotating shaft; any one blade group includes two blades that are mirror-symmetrical about the rotating shaft; any one blade includes a convex surface and a concave surface; among them, a first deflector is arranged on the convex surface, and a second deflector is arranged on the concave surface.

[0012] The gentle breeze detection module includes gentle breeze sensors installed at the wind wheels of each vertical-axis wind turbine, which are used to detect the wind speed and wind direction angle at each wind wheel in real time;

[0013] The strategy unit formulates a control strategy based on the wind speed and wind direction angle at the wind wheel; the control unit controls the opening angles of the first deflector and the second deflector and the effective radius of the wind wheel based on the control strategy.

[0014] As a preferred embodiment of the vertical-axis gentle breeze power generation network system with cluster arrangement according to the present invention, wherein: the strategy unit is configured with a rated wind speed; the strategy unit reads the wind speed and wind direction angle at the wind wheel from the gentle breeze sensors installed at the corresponding wind wheels in real time; the wind direction angle represents the included angle between the wind direction and the horizontal plane; the control strategy includes a first control strategy. When the wind speed at the wind wheel is less than or equal to the rated wind speed, the strategy unit formulates the first control strategy based on the wind speed and wind direction angle at the wind wheel; the control unit responds to the first control strategy and controls the opening angle of the second deflector and the effective radius of the wind wheel.

[0015] As a preferred embodiment of the vertical-axis gentle breeze power generation network system with cluster arrangement according to the present invention, wherein: the first control strategy includes the opening angle of the second deflector and the effective radius of the wind wheel; the method for the strategy unit to determine the opening angle of the second deflector is as follows:

[0016] The strategy unit is configured with a first look-up table; the first look-up table includes different values of the resistance coefficient of the concave surface of the wind wheel facing the wind at different wind direction angles and opening angles of the second deflector when the wind speed is less than or equal to the rated wind speed; the strategy unit queries the maximum value of the resistance coefficient of the concave surface of the wind wheel facing the wind corresponding to the current wind direction angle based on the first look-up table, and obtains the opening angle of the second deflector that makes the resistance coefficient of the concave surface of the wind wheel facing the wind reach the maximum value at the current wind direction angle, as the opening angle of the second deflector in the first control strategy.

[0017] As a preferred embodiment of the vertical-axis gentle breeze power generation network system with cluster arrangement according to the present invention, wherein: the method for formulating the first look-up table is as follows: different wind direction angles are set to conduct power generation experiments on the wind wheel; for any wind direction angle, the resistance coefficient of the concave surface of the wind facing the wind at different opening angles of the second deflector is measured to obtain the first look-up table.

[0018] As a preferred embodiment of the vertical-axis gentle breeze power generation network system with cluster arrangement according to the present invention, wherein: the method for the strategy unit to determine the effective radius of the wind wheel in the first control strategy is as follows:

[0019] The policy unit is also configured with a second look-up table; the second look-up table includes different values of the wind energy utilization rate of the micro wind turbine at different wind speeds and the effective radius of the wind turbine when the wind speed is less than or equal to the rated wind speed; based on the second look-up table, the policy unit queries the maximum value of the wind energy utilization rate of the micro wind turbine corresponding to the current wind speed, and obtains the effective radius of the wind turbine that makes the wind energy utilization rate of the micro wind turbine reach the maximum value at the current wind speed, as the effective radius of the wind turbine in the first control strategy; the effective radius of the wind turbine is the vertical distance between the tip of any blade and the rotation axis.

[0020] As a preferred embodiment of the cluster-arranged vertical-axis micro wind power network system of the present invention, wherein: a guide rail is provided on the fixed shaft, the control unit is configured with an electric driving device, and the electric driving device controls two blades of the blade group to move in opposite directions on the guide rail, and when the effective radius of the wind turbine meets the requirements of the first control strategy, the electric driving device fixes the blade group on the fixed shaft.

[0021] As a preferred embodiment of the cluster-arranged vertical-axis micro wind power network system of the present invention, wherein: the method for formulating the second look-up table is as follows: different wind speeds are set to conduct power generation experiments on the wind turbine; for any wind speed, the wind energy utilization rate of the micro wind turbine is measured at different effective radii of the wind turbine to obtain the second look-up table; wherein, the wind energy utilization rate of the micro wind turbine is calculated based on the output power and the wind speed, and the formula is as follows:

[0022]

[0023] Wherein, C p represents the wind energy utilization rate, P out represents the output power of the micro wind turbine; ρ represents the air density; A represents the swept area of the wind turbine; V represents the wind speed.

[0024] As a preferred embodiment of the cluster-arranged vertical-axis micro wind power network system of the present invention, wherein: the control strategy further includes a second control strategy, when the wind speed at the wind turbine is greater than the rated wind speed, the policy unit formulates a second control strategy based on the wind speed at the wind turbine; the control unit responds to the second control strategy and controls the opening angle of the first deflector and the effective radius of the wind turbine.

[0025] As a preferred embodiment of the cluster-arranged vertical-axis micro wind power network system of the present invention, wherein: the policy unit is configured with a rated radius; the second control strategy includes setting the effective radius of the wind turbine to the rated radius; the second control strategy further includes the opening angle of the first deflector; the method for the policy unit to determine the opening angle of the first deflector is as follows:

[0026] The strategy unit is also configured with a third look-up table; the third look-up table includes the opening angles of the first deflector at different wind speeds when the wind speed is greater than the rated wind speed, the effective radius of the wind turbine is the rated radius, and the output power of the micro-wind generator is the rated power; the strategy unit queries the value of the opening angle of the first deflector corresponding to the current wind speed and the current wind direction angle based on the third look-up table, and uses it as the opening angle of the first deflector in the second control strategy.

[0027] As a preferred embodiment of the cluster-arranged vertical-axis micro-wind power network system of the present invention, wherein: the method for formulating the third look-up table is as follows:

[0028] S1: Conduct power generation experiments on the micro-wind generator at different wind speeds, measure and record the torque of the generator rotor at different wind speeds, and plot a torque-wind speed curve;

[0029] S2: Calculate the rated speed of the wind turbine at different wind speeds; the formula is as follows:

[0030]

[0031] where n a represents the rated speed of the wind turbine per minute at any wind speed; P0 represents the rated power of the micro-wind generator; π represents the radian of a circle; η represents the transmission efficiency of the micro-wind generator; T w represents the torque of the generator rotor at the corresponding wind speed;

[0032] S3: Set the effective radius to the rated radius, and conduct power generation experiments on the micro-wind generator at different wind speeds; for any wind speed, change the opening angle of the first deflector during each experiment;

[0033] S4: At each wind speed, find and record the opening angle of the first deflector corresponding to when the speed of the wind turbine reaches the corresponding rated speed, and obtain the third look-up table.

[0034] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0035] By means of the cluster - arranged gentle - breeze generators, wind energy can be captured and utilized in a gentle - breeze environment, improving the overall power - generation efficiency. According to the changes in wind speed and wind - direction angle, the opening angles of the first deflector and the second deflector and the effective radius of the wind turbine are dynamically adjusted, optimizing the capture and utilization of wind energy and further enhancing the power - generation efficiency. The wind speed and wind - direction angle at each wind turbine are detected in real time. Based on the real - time wind - speed and wind - direction - angle data, a refined control strategy is formulated and executed to ensure that the wind turbine can operate stably under various wind - speed and wind - direction conditions, reducing the efficiency loss or mechanical failures caused by wind - direction changes. By adjusting the effective radius of the wind turbine, wind energy can be maximally utilized at different wind speeds. Whether in gentle - breeze or strong - wind conditions, the present invention can maintain a stable power - generation efficiency by adjusting the parameters of the wind turbine. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. Among them:

[0037] Figure 1 is a schematic structural diagram of the wind turbine of the vertical - axis wind turbine provided by the present invention;

[0038] Figure 2 is a schematic diagram of the rotation direction of the wind turbine provided by the present invention;

[0039] Figure 3 is a schematic structural diagram of the wind turbine when the first deflector is opened provided by the present invention;

[0040] Figure 4 is a schematic structural diagram of the wind turbine when the second deflector is opened provided by the present invention;

[0041] Figure 5 is a schematic structural diagram of the wind turbine after adjusting the blade position provided by the present invention;

[0042] Figure 6 is a flowchart of the method for formulating the third comparison table provided by the present invention.

[0043] Reference numerals: 1, fixed shaft; 2, rotating shaft; 3, convex surface; 4, concave surface; 301, first deflector; 401, second deflector. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0044] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solution of the present invention, rather than limitations on the technical solution of the present invention. Without conflict, the technical features in the embodiments of the present invention and the embodiments can be combined with each other.

[0045] This embodiment introduces a vertical-axis low-wind power generation network system with a cluster layout, including a generator module and a low-wind detection module.

[0046] The generator module includes M low-wind generators arranged in a cluster, where M is a positive integer. Any one of the low-wind generators includes a vertical-axis wind turbine and a generator. The vertical-axis wind turbine is used to capture wind energy and convert it into mechanical energy. The generator is used to convert mechanical energy into electrical energy.

[0047] Any one of the vertical-axis wind turbines includes a wind wheel, a strategy unit, and a control unit. As Figure 1 shown, the wind wheel includes a central shaft and N blade groups, where N is a positive integer. The blade group is used to capture wind energy and generate mechanical energy through rotation. The central shaft is used to fix the blade group and transfer the mechanical energy generated by the rotation of the blade group to the generator. Specifically, the central shaft is respectively connected to the blade group and the rotor of the generator. The blade group drives the rotor to rotate through the central shaft. Inside the generator, the rotation of the rotor generates electrical energy through the principle of electromagnetic induction. The central shaft includes a fixed shaft 1 and a rotating shaft 2. The fixed shaft 1 and the rotating shaft 2 are perpendicular to each other. The fixed shaft 1 is used to fix the blade group, and the rotating shaft 2 is the rotation central shaft of the blade group.

[0048] Any one of the blade groups includes two blades that are mirror-symmetrical about the rotating shaft 2. Any one of the blades includes a convex surface 3 and a concave surface 4. A first deflector 301 is provided on the convex surface 3, and a second deflector 401 is provided on the concave surface 4. When the wind speed is small, less than the rated wind speed, the second deflector 401 arranged on the concave surface 4 is opened, so that the wind thrust received by the concave surface 4 is increased to improve the power generation efficiency. When the wind speed is greater than the rated wind speed, the first deflector 301 arranged on the convex surface 4 needs to be opened to increase the wind thrust received by the convex surface 3, thereby slowing down the rotation speed of the wind wheel and controlling the power generation power at the rated power.

[0049] The low-wind detection module includes low-wind sensors installed at the wind wheels of each vertical-axis wind turbine, which are used to detect the wind speed and wind direction angle at each wind wheel in real time. The wind direction angle represents the angle between the wind direction and the horizontal plane.

[0050] A cluster - arranged micro - wind power network means that multiple micro - wind generators work together in the same area to improve the overall power generation efficiency. Since they work in a micro - wind environment, these generators need to have high sensitivity and adaptability. In a micro - wind environment, the changes in wind speed and direction may be more frequent and intense. This instability poses higher requirements for the operation efficiency and stability of the generators. Strong winds usually have greater kinetic energy and more stable flow directions; the lower speed of micro - winds means less kinetic energy, so they are more vulnerable to external factors (such as terrain, temperature differences, etc.). Therefore, it is necessary to monitor the wind direction and wind speed at each wind turbine respectively and adjust the working parameters of each wind turbine based on the wind direction and wind speed, which helps to maintain the stable operation of the generator and reduce the efficiency loss or mechanical failures caused by wind direction changes.

[0051] The strategy unit formulates a control strategy based on the wind speed and wind direction angle at the wind turbine; the control unit controls the opening angles of the first deflector 301 and the second deflector 401 and the effective radius of the wind turbine based on the control strategy.

[0052] The strategy unit is configured with a rated wind speed; the strategy unit reads the wind speed and wind direction angle at the wind turbine in real - time from the micro - wind sensors installed at the corresponding wind turbines; the control strategy includes a first control strategy. When the wind speed at the wind turbine is less than or equal to the rated wind speed, the strategy unit formulates the first control strategy based on the wind speed and wind direction angle at the wind turbine; the control unit responds to the first control strategy and controls the opening angle of the second deflector 401 and the effective radius of the wind turbine; the wind turbine after the second deflector 401 is opened is as Figure 4 shown.

[0053] The first control strategy includes the opening angle of the second deflector 401 and the effective radius of the wind turbine;

[0054] The method for the strategy unit to determine the opening angle of the second deflector 401 is as follows:

[0055] The strategy unit is configured with a first look - up table; the first look - up table includes different values of the resistance coefficient of the concave surface 4 of the wind turbine to the wind at different wind direction angles and opening angles of the second deflector 401 when the wind speed is less than or equal to the rated wind speed; the strategy unit queries the maximum value of the resistance coefficient of the concave surface 4 of the wind turbine to the wind corresponding to the current wind direction angle based on the first look - up table and obtains the opening angle of the second deflector 401 that makes the resistance coefficient of the concave surface 4 of the wind turbine to the wind reach the maximum value at the current wind direction angle, as the opening angle of the second deflector 401 in the first control strategy.

[0056] In the first look-up table, each wind direction angle corresponds to an opening angle of the second deflector 401, which can maximize the resistance of the concave surface 4 to the wind. When the wind speed is less than the rated wind speed, it is necessary to adjust the opening angle of the second deflector 401 at all times so that the resistance of the concave surface 4 to the wind always remains the maximum, in order to improve the power generation efficiency as much as possible. As Figure 2 shown, the driving of the drag-type S-shaped wind turbine is generated by the unbalanced force on the concave and convex surfaces facing the wind. The concave surface 4 has a large resistance to the wind, so the thrust received by the wind is large, while the convex surface 3 has a small resistance to the wind, so the thrust received by the wind is small; the asymmetry of the thrust received by the concave and convex blades of the wind wheel forms a driving force for the blades to rotate around the rotation axis 2. The control unit is provided with an electromagnetic controller for controlling the second deflector 401, which can control the opening angle of the second deflector 401 according to the first control strategy.

[0057] The method for formulating the first look-up table is as follows: set different wind direction angles to conduct power generation experiments on the wind wheel; for any wind direction angle, measure the resistance coefficient of the concave surface 4 to the wind at different opening angles of the second deflector 401 to obtain the first look-up table.

[0058] The method for the strategy unit to determine the effective radius of the wind wheel in the first control strategy is as follows:

[0059] The strategy unit is also configured with a second look-up table; the second look-up table includes different values of the wind energy utilization rate of the micro-wind turbine at different wind speeds and effective radii of the wind wheel when the wind speed is less than or equal to the rated wind speed; the strategy unit queries the maximum value of the wind energy utilization rate of the micro-wind turbine corresponding to the current wind speed based on the second look-up table, and obtains the effective radius of the wind wheel that maximizes the wind energy utilization rate of the micro-wind turbine at the current wind speed as the effective radius of the wind wheel in the first control strategy.

[0060] A guide rail is provided on the fixed shaft 1, and the control unit is configured with an electric driving device, which controls the two blades of the blade group to move in opposite directions on the guide rail (during the movement, the two blades of the same blade group are always mirror-symmetrical about the rotation axis 2). When the effective radius of the wind wheel meets the requirements of the first control strategy, the electric driving device fixes the blade group on the fixed shaft 1.

[0061] The biggest drawback of vertical-axis wind turbines is their relatively low wind energy utilization rate. The wind energy utilization rate of an ideal horizontal-axis wind turbine can reach 0.593, while that of a two-blade S-shaped wind turbine is only about 0.3. Even under ideal conditions, its wind energy utilization rate is less than 0.4. Therefore, the low wind energy utilization rate is an important factor restricting the development of vertical-axis wind turbines. At different wind speeds, different tip speed ratios correspond to different wind energy utilization rates. Since the tip speed ratio is directly proportional to the effective radius of the wind turbine, at each ambient wind speed, the effective radius of the wind turbine can be set to maximize the wind energy utilization rate.

[0062] The method for formulating the second look-up table is as follows: Conduct power generation experiments on the wind turbine at different wind speeds. For any wind speed, measure the wind energy utilization rate of the micro wind generator at different effective radii of the wind turbine to obtain the second look-up table. Among them, the wind energy utilization rate of the micro wind generator is calculated based on the output power and wind speed, and the formula is as follows:

[0063]

[0064] Among them, C p represents the wind energy utilization rate, P out represents the output power of the micro wind generator; ρ represents the air density; A represents the swept area of the wind turbine; V represents the wind speed.

[0065] The effective radius of the wind turbine is the vertical distance between the tip of any blade and the rotation axis 2. The wind turbine after adjusting the blade position is as Figure 5 shown, Figure 5 where R represents the effective radius of the wind turbine.

[0066] The control strategy also includes a second control strategy. When the wind speed at the wind turbine is greater than the rated wind speed, the strategy unit formulates the second control strategy based on the wind speed at the wind turbine. The control unit responds to the second control strategy and controls the opening angle of the first deflector 301 and the effective radius of the wind turbine. The wind turbine after the first deflector 301 is opened is as Figure 3 shown.

[0067] The strategy unit is configured with a rated radius. The second control strategy includes setting the effective radius of the wind turbine to the rated radius. The second control strategy also includes the opening angle of the first deflector 301. The method for the strategy unit to determine the opening angle of the first deflector 301 is as follows:

[0068] The strategy unit is also configured with a third look-up table; the third look-up table includes the opening angles of the first deflector 301 at different wind speeds when the wind speed is greater than the rated wind speed, the effective radius of the wind turbine is the rated radius, and the output power of the micro-wind generator is the rated power; the strategy unit queries the value of the opening angle of the first deflector 301 corresponding to the current wind speed and the current wind direction angle based on the third look-up table, and uses it as the opening angle of the first deflector 301 in the second control strategy.

[0069] As Figure 6 shown, the method for formulating the third look-up table is as follows:

[0070] S1: Conduct power generation experiments on the micro-wind generator at different wind speeds, measure and record the torque of the generator rotor at different wind speeds, and plot a torque-wind speed curve;

[0071] S2: Calculate the rated speed of the wind turbine at different wind speeds; the formula is as follows:

[0072]

[0073] where, n a represents the rated speed of the wind turbine per minute at any wind speed; P0 represents the rated power of the micro-wind generator; π represents the radian of a circle; η represents the transmission efficiency of the micro-wind generator, determined based on experiments; T w represents the torque of the generator rotor at the corresponding wind speed, read based on the torque-wind speed curve;

[0074] S3: Set the effective radius to the rated radius, and conduct power generation experiments on the micro-wind generator at different wind speeds; for any wind speed, change the opening angle of the first deflector 301 each time during the experiment;

[0075] S4: At each wind speed, find and record the opening angle of the first deflector 301 corresponding to when the speed of the wind turbine reaches the corresponding rated speed, to obtain the third look-up table.

[0076] When the wind speed is greater than the rated wind speed, the second deflector 401 provided on the concave surface 4 of the blade is closed, and the wind turbine radius is set to a preset value; in this case, in order to maintain the power generation at the rated power, each wind speed corresponds to an opening angle of the first deflector 301. Since the output power of power generation cannot be directly controlled, therefore, based on the rated power, the rated speed is calculated, and an experiment is conducted to keep the rated speed unchanged; when the wind speed is too high, the wind turbine speed is controlled based on the wind speed, thereby indirectly controlling the power and making the output power stable at the rated power. The control unit is provided with an electromagnetic controller for controlling the first deflector 301, which can control the opening angle of the first deflector 301 according to the second control strategy.

[0077] Furthermore, the vertical axis wind turbine further includes a bearing and a tower; wherein, the bearing is used to support the rotational movement of the wind wheel; the bearing can reduce the energy loss caused by friction and ensure that the wind wheel can rotate smoothly and efficiently. A good bearing design is crucial for improving the efficiency of the system and extending its service life. The tower is used to fix the bearing and the wind wheel; the tower provides structural support for the wind turbine and ensures that the wind turbine operates stably at an appropriate height. The tower needs to be strong enough to withstand various forces encountered during the operation of the wind turbine, including wind loads, its own weight, and various mechanical vibrations during the operation of the wind turbine, etc.

[0078] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0079] The embodiments of the present invention have been described above in conjunction with the accompanying drawings. However, the present invention is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present invention, those of ordinary skill in the art can also make many forms without departing from the purpose and scope of the present invention. These all fall within the protection scope of the present invention.

Claims

1. A cluster-arranged vertical axis breeze power generation network system, characterized in that: It includes a generator module and a breeze detection module; the generator module includes M breeze generators arranged in clusters, where M is a positive integer; wherein any breeze generator includes a vertical axis wind turbine and a generator; Any vertical axis wind turbine comprises a wind rotor, a strategy unit, and a control unit; the wind rotor comprises a central axis and N blade groups, N being a positive integer; wherein the blade group is used to capture wind energy and generate mechanical energy through rotation; the central axis is used to fix the blade group and transmit the mechanical energy generated by the rotation of the blade group to the generator; the central axis comprises a fixed axis (1) and a rotating axis (2); any blade group comprises two blades that are mirror-symmetrical about the rotating axis (2); any blade comprises a convex surface (3) and a concave surface (4); wherein a first guide plate (301) is provided on the convex surface (3), and a second guide plate (401) is provided on the concave surface (4); The breeze detection module includes a breeze sensor installed at each vertical axis wind turbine rotor, and is used to detect the wind speed and wind direction angle at each rotor in real time; The strategy unit formulates a control strategy based on the wind speed and wind direction angle at the wind rotor; the control unit controls the opening angles of the first guide plate (301) and the second guide plate (401) and the effective radius of the wind rotor based on the control strategy; The control strategy comprises a first control strategy, and when the wind speed at the wind rotor is less than or equal to the rated wind speed, the strategy unit formulates the first control strategy based on the wind speed and wind direction angle at the wind rotor; the first control strategy comprises an opening angle of the second guide plate (401) and an effective radius of the wind rotor; the control unit controls the opening angle of the second guide plate (401) and the effective radius of the wind rotor in response to the first control strategy; The method for the strategy unit to determine the opening angle of the second guide plate (401) is as follows: The strategy unit is configured with a first comparison table; the first comparison table includes different values ​​of the resistance coefficient of the concave surface (4) of the wind wheel to the wind at different wind direction angles and opening angles of the second guide plate (401) when the wind speed is less than or equal to the rated wind speed; based on the first comparison table, the strategy unit queries the maximum value of the resistance coefficient of the concave surface (4) of the wind wheel to the wind corresponding to the current wind direction angle, and obtains the opening angle of the second guide plate (401) that makes the resistance coefficient of the concave surface (4) of the wind wheel to the wind obtain the maximum value at the current wind direction angle, as the opening angle of the second guide plate (401) in the first control strategy.

2. The cluster-arranged vertical axis micro-wind power generation network system according to claim 1, characterized in that: The strategy unit is configured with a rated wind speed; the strategy unit reads the wind speed and wind direction angle at the wind wheel from a breeze sensor installed at the corresponding wind wheel in real time; the wind direction angle represents the angle between the wind direction and the horizontal plane.

3. The cluster-arranged vertical axis micro-wind power generation network system according to claim 2, characterized in that: The method for preparing the first comparison table is as follows: setting different wind direction angles to conduct power generation experiments on the wind wheel; for any wind direction angle, measuring the wind resistance coefficient of the concave surface (4) at different opening angles of the second guide plate (401), to obtain the first comparison table.

4. The cluster-arranged vertical axis micro-wind power generation network system according to claim 3, characterized in that: The method for the strategy unit to determine the effective radius of the wind wheel in the first control strategy is as follows: The strategy unit is also configured with a second comparison table; the second comparison table includes different values ​​of the wind energy utilization rate of the microwind generator at different wind speeds and effective radii of the wind wheel when the wind speed is less than or equal to the rated wind speed; based on the second comparison table, the strategy unit queries the maximum value of the wind energy utilization rate of the microwind generator corresponding to the current wind speed, and obtains the effective radius of the wind wheel that makes the wind energy utilization rate of the microwind generator reach the maximum value at the current wind speed, as the effective radius of the wind wheel in the first control strategy; the effective radius of the wind wheel is the vertical distance between the tip of any blade and the rotation axis (2).

5. The cluster-arranged vertical axis micro-wind power generation network system according to claim 4, characterized in that: A guide rail is provided on the fixed shaft (1), and the control unit is provided with an electric drive device, the electric drive device controls two blades of the blade group to move on the guide rail in opposite directions, and when the effective radius of the wind wheel meets the requirements of the first control strategy, the electric drive device fixes the blade group on the fixed shaft (1).

6. The cluster-arranged vertical axis micro-wind power generation network system according to claim 5, characterized in that: The method for formulating the second comparison table is as follows: setting different wind speeds to conduct power generation experiments on the wind rotor; for any wind speed, measuring the wind energy utilization rate of the micro-wind generator at different effective radii of the wind rotor to obtain the second comparison table; wherein the wind energy utilization rate of the micro-wind generator is calculated based on the output power and wind speed, and the formula is as follows: ； in, represents the wind energy utilization rate, Indicates the output power of the breeze generator; represents air density; A represents the swept area of ​​the wind wheel; V represents wind speed.

7. The cluster-arranged vertical axis micro-wind power generation network system according to claim 6, characterized in that: The control strategy also includes a second control strategy. When the wind speed at the wind rotor is greater than the rated wind speed, the strategy unit formulates the second control strategy based on the wind speed at the wind rotor; and the control unit controls the opening angle of the first guide plate (301) and the effective radius of the wind rotor in response to the second control strategy.

8. The cluster-arranged vertical axis micro-wind power generation network system according to claim 7, characterized in that: The strategy unit is configured with a rated radius; the second control strategy includes setting the effective radius of the wind wheel to the rated radius; the second control strategy also includes an opening angle of the first guide plate (301); the method for the strategy unit to determine the opening angle of the first guide plate (301) is as follows: The strategy unit is also configured with a third comparison table; the third comparison table includes the opening angles of the first guide plate (301) at different wind speeds when the wind speed is greater than the rated wind speed, the effective radius of the wind wheel is the rated radius, and the output power of the micro-wind generator is the rated power; based on the third comparison table, the strategy unit queries the value of the opening angle of the first guide plate (301) corresponding to the current wind speed and the current wind direction angle, as the opening angle of the first guide plate (301) in the second control strategy.

9. The cluster-arranged vertical axis micro-wind power generation network system according to claim 8, characterized in that: The method for formulating the third comparison table is as follows: S1: Set different wind speeds to conduct power generation experiments on the breeze generator, measure and record the torque of the generator rotor under different wind speeds, and draw the torque-wind speed curve; S2: Calculate the rated speed of the wind rotor at different wind speeds; the formula is as follows: ； in, Indicates the rated speed of the wind wheel per minute at any wind speed; Indicates the rated power of the breeze generator; Represents the arc of a circle; Indicates the transmission efficiency of the micro-wind generator; Indicates the torque of the generator rotor at the corresponding wind speed; S3: setting the effective radius to the rated radius, setting different wind speeds to conduct power generation experiments on the breeze generator; for any wind speed, setting the opening angle of the first guide plate (301) to be changed during each experiment; S4: At each wind speed, find and record the opening angle of the corresponding first guide plate (301) when the rotation speed of the wind wheel reaches the corresponding rated rotation speed, and obtain the third comparison table.

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