Vertical axis breeze power generation network system arranged in cluster mode

Abstract

The invention relates to the technical field of breeze generators, and discloses a clustered vertical axis breeze power generation network system, which comprises a generator module and a breeze detection module, the generator module comprises gentle breeze generators which are arranged in a clustered manner; the breeze generator comprises a vertical axis wind turbine and a generator; the vertical axis wind turbine comprises a wind wheel, a strategy unit and a control unit. The wind wheel comprises a central shaft and a blade group; the blade group comprises two blades; each blade comprises a convex surface and a concave surface; a first guide plate is arranged on the convex surface, and a second guide plate is arranged on the concave surface; the breeze detection module comprises a breeze sensor used 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 guide plate and the second guide plate and the effective radius of the wind wheel; integrated power generation in the breeze environment is achieved, the system stability is enhanced, and the wind energy utilization rate is increased.

Description

Technical Field

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

[0002] The clustered vertical axis micro-wind power generation network system is a power generation system that arranges multiple vertical axis wind turbines in a cluster in the same area and works together. This system can effectively improve the overall power generation efficiency by integrating multiple wind turbines, while reducing the operating cost and maintenance difficulty of a single generator. The clustered vertical axis micro-wind power generation network system has some shortcomings and challenges in its actual application.

[0003] The low utilization rate of wind energy is an important reason that restricts the development of vertical axis wind turbines. In the clustered vertical axis breeze power generation network system, 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 equipping of high-precision sensors and controllers. However, due to the uncertainty and complexity of changes in wind speed and wind direction, the formulation and implementation of control strategies face great challenges. The lower speed of the breeze means that its kinetic energy is smaller, so it is more susceptible to interference from external factors (such as terrain, temperature differences, etc.). These factors will cause more frequent and drastic changes in wind speed and wind direction, thereby affecting the operating efficiency and stability of wind turbines.

[0004] For example, a 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. The double-layer improved Savonius wind wheel can change the state of the wind wheel being opened or closed according to the real-time wind speed, thereby ensuring that the switched reluctance generator itself has excellent starting performance and can have a larger starting torque, and greatly reduces the wind resistance caused by the traditional Savonius wind wheel when the wind speed is high, thereby achieving 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 small and medium-sized distributed micro-wind power generation occasions.

[0005] For example, the patent application with the publication number CN102220937A discloses a vertical axis magnetic suspension wind turbine with breeze start and lightning protection functions, including a vertical axis, a disc-shaped shell composed of an upper shell cover, a short axial cylindrical shell in the middle and a lower shell cover, a stator, an outer rotor and a load-bearing flange arranged at the bottom of the vertical axis. An S-shaped wind tube with two or four sections and openings on the upper and lower sides made of more than two semicircular metal sheets is provided, and the S-shaped wind tube is arranged on the vertical axis; a lightning rod ball is provided at the top of the vertical axis, and the root of the lightning rod ball is connected to the entire wind turbine and is made into a grounding electrode under the ground. Rotating around the vertical axis, the wind turbine is downward as a whole, and there is no friction or resistance between them. As long as there is a breeze of any wind direction, the wind turbine can rotate, thereby generating electricity, and it runs smoothly, without shaking or noise. When a lightning strike occurs, the lightning rod ball directly shunts the strong current formed by the lightning strike to the earth to avoid the wind turbine from being struck by lightning and ensure the normal use of the wind power system.

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

[0007] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgement or any form of suggestion that the information constitutes the prior art already known to ordinary technicians in this field. 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 cluster-arranged vertical axis breeze power generation network system to achieve integrated power generation in a breeze environment, enhance system stability, and improve wind energy utilization.

[0009] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0010] A cluster-arranged vertical axis breeze power generation network system comprises a generator module and a breeze detection module; the generator module comprises M breeze generators arranged in a cluster, where M is a positive integer; wherein any breeze generator comprises a vertical axis wind turbine and a generator;

[0011] Any vertical axis wind turbine includes a wind rotor, a strategy unit, and a control unit; the wind rotor includes a central axis and N blade groups, where N is a positive integer; wherein the blade group is used to capture wind energy and generate mechanical energy by 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 includes a fixed axis and a rotating axis; any blade group includes two blades that are mirror-symmetrical about the rotating axis; any blade includes a convex surface and a concave surface; wherein a first guide plate is provided on the convex surface, and a second guide plate is provided on the concave surface;

[0012] 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;

[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 guide plate and the second guide plate and the effective radius of the wind wheel based on the control strategy.

[0014] As a preferred solution of the clustered vertical axis breeze power generation network system described in 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 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; 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 a 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 to control the opening angle of the second guide plate and the effective radius of the wind wheel.

[0015] As a preferred solution of the cluster-arranged vertical axis micro-wind power generation network system of the present invention, wherein: the first control strategy includes the opening angle of the second guide plate and the effective radius of the wind wheel; the method for the strategy unit to determine the opening angle of the second guide plate is as follows:

[0016] 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 of the wind wheel to the wind at different wind direction angles and opening angles of the second guide plate 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 of the wind wheel to the wind corresponding to the current wind direction angle, and obtains the opening angle of the second guide plate that makes the resistance coefficient of the concave surface of the wind wheel to the wind reach the maximum value at the current wind direction angle, as the opening angle of the second guide plate in the first control strategy.

[0017] As a preferred solution of the cluster-arranged vertical axis micro-wind power generation network system described in the present invention, the method for formulating 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 drag coefficient of the concave surface to the wind at different opening angles of the second guide plate to obtain the first comparison table.

[0018] As a preferred solution of the cluster-arranged vertical axis micro-wind power generation network system of the present invention, the method in which the strategy unit determines the effective radius of the wind wheel in the first control strategy is as follows:

[0019] 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.

[0020] As a preferred solution of the cluster-arranged vertical axis micro-wind power generation network system described in the present invention, a guide rail is arranged on the fixed axis, and the control unit is equipped with an electric drive device, and the electric drive device controls the two blades of the blade group to move in opposite directions on the guide rail. 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 axis.

[0021] As a preferred solution of the cluster-arranged vertical axis micro-wind power generation network system of the present invention, the method for formulating the second comparison table is as follows: setting different wind speeds to conduct power generation experiments on the wind wheel; for any wind speed, measuring the wind energy utilization rate of the micro-wind generator at different effective radii of the wind wheel 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:

[0022]

[0023] Among them, C p represents the wind energy utilization rate, P out represents the output power of the breeze generator; ρ represents the air density; A represents the swept area of ​​the wind wheel; V represents the wind speed.

[0024] As a preferred solution of the clustered vertical axis microwind power generation network system described in the present invention, the control strategy also includes a second control strategy. When the wind speed at the wind wheel is greater than the rated wind speed, the strategy unit formulates a second control strategy based on the wind speed at the wind wheel; the control unit responds to the second control strategy to control the opening angle of the first guide plate and the effective radius of the wind wheel.

[0025] As a preferred solution of the cluster-arranged vertical axis micro-wind power generation network system of the present invention, wherein: 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; the method for the strategy unit to determine the opening angle of the first guide plate is as follows:

[0026] The strategy unit is also configured with a third comparison table; the third comparison table includes the opening angle of the first guide plate 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 microwind 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 corresponding to the current wind speed and the current wind direction angle as the opening angle of the first guide plate in the second control strategy.

[0027] As a preferred solution of the cluster-arranged vertical axis breeze power generation network system of the present invention, the method for formulating the third comparison table is as follows:

[0028] 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 a torque-wind speed curve;

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

[0030]

[0031] Among them, n a Indicates the rated speed of the wind wheel per minute at any wind speed; P 0 represents the rated power of the micro-wind generator; π represents the arc of a circle; η represents the transmission efficiency of the micro-wind generator; T w Indicates the torque of the generator rotor at the corresponding wind speed;

[0032] 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 to be changed in each experiment;

[0033] S4: At each wind speed, find and record the opening angle of the corresponding first guide plate when the rotation speed of the wind wheel reaches the corresponding rated rotation speed, and obtain the third comparison table.

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

[0035] Through clustered arrangement of micro-wind generators, wind energy can be captured and utilized in a micro-wind environment, thereby improving the overall power generation efficiency. According to the changes in wind speed and wind direction angle, the opening angles of the first guide plate and the second guide plate and the effective radius of the wind wheel are dynamically adjusted to optimize the capture and utilization of wind energy and further improve the power generation efficiency. The wind speed and wind direction angle at each wind wheel are detected in real time, and a sophisticated control strategy is formulated and implemented based on the real-time wind speed and wind direction angle data to ensure that the wind wheel can operate stably under various wind speed and wind direction conditions, reducing efficiency losses or mechanical failures caused by changes in wind direction. By adjusting the effective radius of the wind wheel, wind energy can be maximized at different wind speeds. Whether in light wind or strong wind conditions, the present invention can maintain stable power generation efficiency by adjusting the wind wheel parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing 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 labor. Among them:

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

[0038] Figure 2 A schematic diagram of the rotation direction of the wind wheel provided by the present invention;

[0039] Figure 3 A schematic diagram of the structure of the wind wheel when the first guide plate provided by the present invention is opened;

[0040] Figure 4 A schematic diagram of the structure of the wind wheel when the second guide plate provided by the present invention is opened;

[0041] Figure 5 A schematic diagram of the structure of the wind wheel after adjusting the blade position provided by the present invention;

[0042] Figure 6 A flow chart of the method for formulating the third comparison table provided by the present invention.

[0043] Figure numerals: 1, fixed axis; 2, rotating axis; 3, convex surface; 4, concave surface; 301, first guide plate; 401, second guide plate. DETAILED DESCRIPTION

[0044] The technical solution of the present invention is described in detail below through 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. The embodiments of the present invention and the technical features in the embodiments may be combined with each other unless there is a conflict.

[0045] This embodiment introduces a cluster-arranged vertical axis breeze power generation network system, including a generator module and a breeze detection module;

[0046] The generator module includes M micro-wind generators arranged in clusters, where M is a positive integer; wherein any micro-wind generator includes a vertical axis wind turbine and a generator; the vertical axis wind turbine is used to capture wind energy and convert the wind energy into mechanical energy; the generator is used to convert the mechanical energy into electrical energy;

[0047] Any vertical axis wind turbine includes a wind rotor, a strategy unit, and a control unit; Figure 1 As shown, the wind wheel includes a central axis and N blade groups, where N is 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; specifically, the central axis is connected to the blade group and the rotor of the generator respectively, and the blade group drives the rotor to rotate through the central axis, and inside the generator, the rotation of the rotor generates electrical energy through the principle of electromagnetic induction. The central axis includes a fixed axis 1 and a rotating axis 2; wherein the fixed axis 1 and the rotating axis 2 are perpendicular to each other; the fixed axis 1 is used to fix the blade group, and the rotating axis 2 is the rotating central axis of the blade group.

[0048] Any blade group includes two blades that are mirror-symmetrical about the rotation axis 2; any blade includes 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; when the wind speed is small and less than the rated wind speed, the second guide plate 401 arranged on the concave surface 4 is opened to increase the thrust of the wind on the concave surface 4 to improve the power generation efficiency. When the wind speed is greater than the rated wind speed, the first guide plate 301 arranged on the convex surface 4 needs to be opened to increase the thrust of the wind on 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 breeze detection module includes a breeze sensor installed at each vertical axis wind turbine rotor, which is used to detect the wind speed and wind direction angle at each rotor in real time; the wind direction angle represents the angle between the wind direction and the horizontal plane;

[0050] A clustered breeze power generation network means that multiple breeze generators work together in the same area to improve the overall power generation efficiency. Since they work in a breeze environment, these generators need to have high sensitivity and adaptability. In a breeze environment, changes in wind speed and direction may be more frequent and drastic. This instability places higher demands on the operating efficiency and stability of the generator. Strong winds usually have greater kinetic energy and a more stable flow direction; the lower speed of breezes means that their kinetic energy is smaller, so they are more susceptible to interference from external factors (such as terrain, temperature differences, etc.). Therefore, it is necessary to monitor the wind direction and wind speed at each wind wheel separately, and adjust the working parameters of each wind wheel based on the wind direction and wind speed, which helps to maintain the stable operation of the generator and reduce efficiency losses or mechanical failures caused by changes in wind direction.

[0051] 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 guide plate 301 and the second guide plate 401 and the effective radius of the wind wheel 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 rotor from a breeze sensor installed at the corresponding wind rotor in real time; the control strategy includes a first control strategy, when the wind speed at the wind rotor is less than or equal to the rated wind speed, the strategy unit formulates a first control strategy based on the wind speed and wind direction angle at 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 wind rotor after the second guide plate 401 is opened is as follows Figure 4 shown.

[0053] The first control strategy includes the opening angle of the second guide plate 401 and the effective radius of the wind wheel;

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

[0055] 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 reach the maximum value at the current wind direction angle, as the opening angle of the second guide plate 401 in the first control strategy.

[0056] In the first comparison table, each wind direction angle corresponds to an opening angle of the second guide plate 401, which can maximize the wind resistance of the concave surface 4. When the wind speed is less than the rated wind speed, it is necessary to constantly adjust the opening angle of the second guide plate 401 so that the wind resistance of the concave surface 4 is always maximized to maximize the power generation efficiency. Figure 2 As shown, the driving force of the resistance-type S-type 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, and the thrust received by the wind is large, while the convex surface 3 has a small resistance to the wind, and the thrust received by the wind is small; the asymmetry of the thrust received by the convex and concave blades of the wind wheel forms a driving force for the blades to rotate around the rotating shaft 2. The control unit is provided with an electromagnetic controller for controlling the second guide plate 401, which can control the opening angle of the second guide plate 401 according to the first control strategy.

[0057] The method for formulating 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 resistance coefficient of the concave surface 4 to the wind at different opening angles of the second guide plate 401, to obtain the first comparison 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 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.

[0060] A guide rail is provided on the fixed shaft 1, and the control unit is equipped with an electric drive device. The electric drive device controls the two blades of the blade group to move in opposite directions on the guide rail (the two blades of the same blade group are always mirror-symmetrical about the rotating shaft 2 during the movement). 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.

[0061] The biggest drawback of vertical axis wind turbines is the low wind energy utilization rate. The wind energy utilization rate of an ideal horizontal axis wind turbine can reach 0.593, while the wind energy utilization rate 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 reason that restricts 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 proportional to the effective radius of the wind rotor, at each ambient wind speed, the wind energy utilization rate can be maximized by setting the effective radius of the wind rotor.

[0062] 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:

[0063]

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

[0065] The effective radius of the wind wheel is the vertical distance between the tip of any blade and the rotation axis 2; Figure 5 As shown, Figure 5 R represents the effective radius of the wind wheel.

[0066] 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. The control unit responds to the second control strategy to control the opening angle of the first guide plate 301 and the effective radius of the wind rotor. After the first guide plate 301 is opened, the wind rotor is 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 wheel to the rated radius; the second control strategy also includes an opening angle of the first guide plate 301; the method by which the strategy unit determines the opening angle of the first guide plate 301 is as follows:

[0068] 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 microwind 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.

[0069] like Figure 6 As shown, the method for formulating the third comparison table is as follows:

[0070] 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 a torque-wind speed curve;

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

[0072]

[0073] Among them, n a Indicates the rated speed of the wind wheel per minute at any wind speed; P 0 represents the rated power of the micro-wind generator; π represents the arc of a circle; η represents the transmission efficiency of the micro-wind generator, based on experimental determination; T w Indicates the torque of the generator rotor at the corresponding wind speed, which is read based on the torque-wind speed curve;

[0074] 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 in each experiment;

[0075] S4: At each wind speed, find and record the opening angle of the first guide plate 301 corresponding to the time when the rotation speed of the wind wheel reaches the corresponding rated rotation speed, and obtain the third comparison table.

[0076] When the wind speed is greater than the rated wind speed, the second guide plate 401 provided on the concave surface 4 of the blade is closed, and the radius of the wind wheel 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 guide plate 301. Since the output power of the power generation cannot be directly controlled, the rated speed is calculated based on the rated power, and an experiment is conducted to keep the rated speed unchanged; when the wind speed is too large, the wind wheel speed is controlled based on the wind speed, thereby indirectly controlling the power and stabilizing the output power at the rated power. The control unit is provided with an electromagnetic controller for controlling the first guide plate 301, which can control the opening angle of the first guide plate 301 according to the second control strategy.

[0077] Furthermore, the vertical axis wind turbine also includes a bearing and a tower; wherein the bearing is used to support the rotational movement of the wind rotor; the bearing can reduce the energy loss caused by friction and ensure that the wind rotor can rotate smoothly and efficiently. Good bearing design is essential to improve the efficiency of the system and extend its service life. The tower is used to fix the bearing and the wind rotor; the tower provides structural support for the wind turbine to ensure that the wind turbine works stably at an appropriate height. The tower needs to be strong enough to withstand the 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.

[0078] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may 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 are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the purpose and scope of protection of the present invention, which are all within the protection 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 by 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 wheel; 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 wheel based on the 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; 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 a 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 to control the opening angle of the second guide plate (401) and the effective radius of the wind wheel.

3. The cluster-arranged vertical axis micro-wind power generation network system according to claim 2, characterized in that: The first control strategy includes the opening angle of the second guide plate (401) and the effective radius of the wind wheel; 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.

4. The cluster-arranged vertical axis micro-wind power generation network system according to claim 3, 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.

5. The cluster-arranged vertical axis micro-wind power generation network system according to claim 4, 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).

6. The cluster-arranged vertical axis micro-wind power generation network system according to claim 5, characterized in that: A guide rail is arranged on the fixed shaft (1), and the control unit is equipped with an electric drive device, which controls two blades of the blade group to move on the guide rail in opposite directions. 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).

7. The cluster-arranged vertical axis micro-wind power generation network system according to claim 6, 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: Among them, C p represents the wind energy utilization rate, P out represents the output power of the breeze generator; ρ represents the air density; A represents the swept area of ​​the wind wheel; V represents the wind speed.

8. The cluster-arranged vertical axis micro-wind power generation network system according to claim 7, 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; the control unit responds to the second control strategy to control the opening angle of the first guide plate (301) and the effective radius of the wind rotor.

9. The cluster-arranged vertical axis micro-wind power generation network system according to claim 8, 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.

10. The cluster-arranged vertical axis micro-wind power generation network system according to claim 9, 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: Among them, n a It represents the rated speed of the wind wheel per minute at any wind speed; P0 represents the rated power of the micro-wind generator; π represents the arc of a circle; η represents the transmission efficiency of the micro-wind generator; T w 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 in 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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