Intelligent vertical axis wind turbine and control algorithm thereof

Abstract

The application provides a kind of intelligent vertical axis wind turbine and its control algorithm, including fan base and rotating main shaft vertically rotatingly arranged on fan base, bottom end of rotating main shaft is connected flexible fan blade through variable pitch device, flexible fan blade is equidistantly distributed around the axis of rotating main shaft, flexible blade control component for controlling the axial length of flexible blade and the shape of windward surface of flexible blade is arranged inside flexible blade, bottom end of rotating main shaft is drivingly connected with input shaft of generator arranged in fan base through transmission speed regulation component.The application produces the effect of improving power generation efficiency and safety of fan power generation.

Description

Technical Field

[0001] This invention relates to the field of vertical axis wind power generation technology, and in particular to an intelligent vertical axis wind turbine and its control algorithm. Background Technology

[0002] Traditional horizontal axis wind turbines are not only bulky and inconvenient to transport and handle, but also require significant maintenance costs. Their fatal flaw is that they can only be used in areas with a single wind direction and high wind speed, making them unsuitable for locations with unstable wind force and direction. Vertical axis wind turbines, on the other hand, solve the problem of inconsistent wind force and direction. They can accept wind from any direction and, with an automatic start-up device, can start and operate slowly even at low wind speeds. Furthermore, they are smaller, lighter, and easier to load and unload, making them more widely applicable and significantly overcoming the inherent limitations of horizontal axis wind turbines.

[0003] However, there are serious technical deficiencies in the relevant technical solutions, especially in the pitch and speed control of wind turbines. Regarding pitch control: the vast majority of vertical axis wind turbines on the market currently lack active pitch control structures and functions. This makes it impossible to adjust the turbine's attitude according to wind speed, easily leading to accidents such as blade stall and damage in strong winds, and difficulty in self-starting in low winds. Regarding speed control: vertical axis wind turbines currently lack this capability, failing to control blade speed through adjustments to the internal turbine structure. This easily leads to excessive generator power due to excessive blade speed, causing circuit burnout. Furthermore, current vertical axis wind turbines lack intelligence; they cannot control blade attitude and speed through intelligent algorithms, nor can they monitor various turbine data in real time, increasing the burden of operation and maintenance. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an intelligent vertical axis wind turbine and its control algorithm, which solves the problem that existing technologies cannot intelligently adjust blade speed and attitude to maintain the wind turbine within the maximum power generation condition within a safe operating range.

[0005] According to an embodiment of the present invention, an intelligent vertical axis wind turbine includes a wind turbine base and a rotating main shaft vertically rotatably mounted on the wind turbine base. The bottom end of the rotating main shaft is connected to flexible fan blades via a pitch control device. The flexible fan blades are equidistantly distributed around the axis of the rotating main shaft. The flexible blades are provided with a blade control assembly inside to control the axial length of the flexible blades and the shape of the windward face of the flexible blades. The bottom end of the rotating main shaft is connected to the input shaft of a generator arranged in the wind turbine base via a transmission speed regulating assembly.

[0006] Preferably, the flexible blade is made of a high-toughness shape memory alloy. The flexible blade includes a central flexible fan blade located in the middle, inner flexible fan blades slidably fitted at both ends of the central flexible fan blade, and outer flexible fan blades slidably fitted on the movable ends of the inner flexible fan blades. The blade control assembly includes a first telescopic link and a second telescopic link driven by a push rod motor. The first telescopic link is located between the two outer flexible fan blades, and the second telescopic link is located between the two inner flexible fan blades. The central flexible fan blade is provided with a primary elastic link and a secondary elastic link driven by a motor. One end of the primary elastic link and the secondary elastic link are connected to the output shaft of the motor through an eccentric structure. The central flexible fan blade includes a planar sidewall and an arc-shaped sidewall. The movable ends of the primary elastic link and the secondary elastic link are respectively connected to the middle and the end of the sidewall of the central flexible fan blade.

[0007] Preferably, the sidewalls of the central flexible fan blade, the inner flexible fan blade, and the outer flexible fan blade are provided with wavy flexible deformation teeth, and the direction of the flexible deformation teeth is parallel to the axis of the flexible blade.

[0008] Preferably, a bracket is provided at the inner middle part of the central flexible fan blade and at the end of the inner flexible fan blade away from the central flexible fan blade, and a rubber cover is provided at the end of the outer flexible fan blade away from the central flexible fan blade. The first telescopic connecting rod is arranged between the rubber cover and the bracket of the central flexible fan blade, and the second telescopic connecting rod is arranged between the bracket of the central flexible fan blade and the bracket of the inner flexible fan blade.

[0009] Preferably, the pitch control device includes a pitch telescopic rod hinged to the rotating main shaft, and the hinge between the pitch telescopic rod and the rotating main shaft is perpendicular to the rotating main shaft. The middle part of the flexible blade is hinged to the movable end of the pitch telescopic rod. A push rod motor is installed inside the pitch telescopic rod, and the hinge pins of the hinges at both ends of the pitch telescopic rod are connected to motors that drive the rotation.

[0010] Preferably, a top angle limiter and a bottom angle limiter are respectively provided at the top and bottom of the connection end between the pitch telescopic rod and the rotating main shaft.

[0011] Preferably, a fixing block is provided at the bottom of the connection end between the pitch telescopic rod and the rotating main shaft, a round rod is movably hinged to the bottom end of the fixing block, a centrifugal speed-increasing ball is connected to the movable end of the round rod, and a gap is provided between the rotating main shaft and the fixing block, and the width of the gap is greater than the length of the round rod.

[0012] Preferably, the transmission speed regulating assembly includes a central toothed bevel coaxially fixedly connected to the bottom end of the rotating main shaft. A connecting rod is horizontally rotatably mounted on the fan base. One end of the connecting rod is coaxially fixedly connected to a front engagement disc. The axis of the front engagement disc is perpendicular to the axis of the central toothed bevel. A continuous groove with annular distribution is provided around the central toothed bevel. The front engagement disc meshes perpendicularly with the central toothed bevel. A gear disc is fixedly connected to the input shaft of the generator. The axis of the gear disc is perpendicular to the axis of the connecting rod. A continuous groove with multiple annular distribution is coaxially provided on the top surface of the gear disc. A telescopic rod is slidably mounted coaxially at the end of the connecting rod away from the rotating main shaft. A rear engagement disc is coaxially fixedly connected to the movable end of the telescopic rod. The rear engagement disc meshes perpendicularly with the continuous groove.

[0013] Preferably, the connecting rod is horizontally rotatably mounted on the fan base via a first central bearing and a second central bearing. The front and rear engagement discs are both composed of ring-shaped gears, which are evenly distributed around the axis of the connecting rod. The gears are rotatably mounted, and each gear can be inserted into a single groove of a continuous groove.

[0014] A novel control algorithm for a smart vertical axis wind turbine employs a multi-objective particle swarm optimization algorithm combining Cauchy mutation and differential evolution. The algorithm includes the following steps: parameter initialization setting, learning factor setting, weight setting, Cauchy mutation operation, differential evolution operation, and local and global optimal update. The latter five operations are the main loop operations, and the optimal value is output after the main loop reaches the maximum number of iterations.

[0015] The learning factor and weights are set as follows: the learning factor and weights are set as a function of fitness, and the optimal value is obtained by iterating through the main loop.

[0016] The Cauchy mutation operation introduces the Cauchy mutation operator and sets it as a function related to the number of iterations to help update the optimal value;

[0017] Differential evolution involves setting an initial population based on previous data, and then performing mutations and crossover selections on it to help update the optimal value.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This vertical axis wind turbine not only enables pitch control but also allows for adjustment of the blades' windward surface. The flexible blades can be adjusted axially to further change the area of ​​the blades' windward surface, adapting to the current wind speed and improving wind energy utilization efficiency. The transmission adjustment component can adjust the speed of the main shaft's transmission to the generator, thus preventing the fan blades from stalling and being damaged due to excessive speed, and also preventing the generator's wiring from burning out due to excessive speed.

[0020] The technical solution of this application innovates the pitch, speed and intelligent control algorithms, which fills a certain technical gap and enables the vertical axis wind turbine to adjust its pitch and speed according to the current wind speed by relying on intelligent algorithms, so as to adapt to the current wind speed and achieve the goal of maximizing the utilization of wind energy. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention.

[0022] Figure 2 This is a schematic diagram of the internal structure of the fan protective shell in an embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram of the structure of the fan protective shell in an embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of the windward side of the flexible blade in an embodiment of the present invention.

[0025] Figure 5 This is a schematic diagram of the windward surface of the flexible blade in an embodiment of the present invention.

[0026] Figure 6 This is a schematic diagram of the internal structure of the flexible blade in an embodiment of the present invention.

[0027] Figure 7 This is a schematic diagram of the flexible blade in a contracted state in an embodiment of the present invention.

[0028] Figure 8 This is a schematic diagram of the speed change device in an embodiment of the present invention.

[0029] Figure 9 This is a schematic diagram of the pitch device in an embodiment of the present invention.

[0030] Figure 10 This is a schematic diagram of the pitch device in a retracted state in an embodiment of the present invention.

[0031] Figure 11 This is a schematic diagram of the pitch device in the extended state in an embodiment of the present invention.

[0032] Figure 12 This is a flowchart of the control algorithm in an embodiment of the present invention.

[0033] In the above attached figures: 1. Wind turbine base; 2. Wind turbine protective shell; 3. Outer flexible fan blade; 4. Inner flexible fan blade; 5. Central flexible fan blade; 6. Pitch telescopic rod; 7. Top angle limiter; 8. Centrifugal speed-increasing ball; 9. Bottom angle limiter; 10. Rotating main shaft; 11. Central toothed bevel; 15. Three-phase squirrel-cage generator; 16. First telescopic connecting rod; 17. Second telescopic connecting rod; 18. Flexible deformable tooth; 19. First-stage elastic connecting rod; 20. Second-stage elastic connecting rod; 21. Front engagement disc; 22. Front fixing disc; 23. Telescopic fixing device; 24. First central bearing; 25. Second central bearing; 26. Connecting rod; 27. Telescopic rod; 28. Rear fixing disc; 29. ​​Rear engagement disc. Detailed Implementation

[0034] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0035] like Figure 1-11 As shown, to achieve stable rotation and high-efficiency power generation of a vertical axis wind turbine under various wind speeds, this invention proposes an intelligent vertical axis wind turbine, including a wind turbine base 1 and a rotating main shaft 10 vertically rotatably mounted on the wind turbine base 1. The bottom end of the rotating main shaft 10 is connected to flexible blades via a pitch control device. The flexible blades are equidistantly distributed around the axis of the rotating main shaft 10. A blade control assembly is provided inside the flexible blades to control the axial length and windward shape of the blades. The bottom end of the rotating main shaft 10 is connected to the input shaft of a generator arranged within the wind turbine base 1 via a transmission speed control assembly.

[0036] Considering the weight and volume of wind turbine components, as well as their different functions, and aiming to improve the flexibility of wind turbine pitch and speed regulation, increase power generation efficiency, reduce power transmission losses, and improve the stability of equipment operation in harsh weather, the implementation plan systematically arranges pitch, speed, and flexible retractable blades on the wind turbine, based on the following principles: First, ensure that the device structure has strong retractability and a high degree of freedom; second, ensure that the device structure has a large range of extension and contraction, allowing for ample space to adjust the blades and speed reducers for different wind speeds; third, ensure the compactness and independence of the device structure, meaning that all components occupy as little space as possible and do not interfere with each other during operation, thus affecting normal power generation.

[0037] A protective shell 2 is installed on the wind turbine base 1, covering the bottom of the rotating main shaft 10, the generator, and the transmission speed control assembly. The protective shell 2 is flat and has a large bottom area to accommodate more internal components. The wind turbine's pitch control device controls the rotation radius of the flexible blades, further limiting their torque and ensuring their rotational characteristics adapt to the current wind speed. The transmission speed control assembly controls the speed transmitted from the rotating main shaft 10 to the generator, preventing the flexible blades from stalling and being damaged due to excessive speed, and also preventing the engine from burning out its wiring due to excessive power. The blade control assembly controls the length of the flexible blades, i.e., their windward area, thus controlling their rotational characteristics. Furthermore, the blade control assembly also controls the structure of the flexible blades, controlling their windward and convex surfaces, further controlling their rotational characteristics.

[0038] A clamp temperature sensor and a tower tilt sensor are installed in the tower head area. The clamp is used to hold the transmission line, and the clamp temperature sensor is used to monitor the temperature of the transmission line to protect the wind turbine. The tower tilt sensor is used to detect the tilt of the tower. When the tower tilt is large, it indicates that the fixing structure in the tower head area has become loose, and it is tightened in time.

[0039] like Figure 4-7 As shown, in order to realize the control of the windward and windward sides of the flexible blade by the blade adjustment assembly, the rotation characteristics of the flexible blade are adjusted. The flexible blades are made of high-toughness shape memory alloy. The flexible blades include a central flexible fan blade 5 located in the middle, inner flexible fan blades 4 slidably fitted at both ends of the central flexible fan blade 5, and outer flexible fan blades 3 slidably fitted on the movable ends of the inner flexible fan blades 4. The blade control assembly includes a first telescopic link 16 and a second telescopic link 17 driven to extend and retract by a push rod motor. The first telescopic link 16 is located between the two outer flexible fan blades 3, and the second telescopic link 17 is located between the two inner flexible fan blades 4. The central flexible fan blade 5 is provided with a primary elastic link 19 and a secondary elastic link 20 driven to rotate by a motor. One end of the primary elastic link 19 and the secondary elastic link 20 are connected to the output shaft of the motor through an eccentric structure. The central flexible fan blade 5 includes a planar sidewall and an arc-shaped sidewall. The movable ends of the primary elastic link 19 and the secondary elastic link 20 are respectively connected to the middle and the end of the sidewall of the central flexible fan blade 5.

[0040] The blades of the flexible blades are made of high-toughness thin-walled alloys, which have good ductility. They can be made of magnesium-aluminum alloys with added nickel and titanium, which are lightweight, high-strength, corrosion-resistant and highly ductile.

[0041] A rubber cap is installed at the movable end of the outer flexible fan blade 3, which can protect the inside of the blade without affecting the elastic deformation of the flexible fan blade.

[0042] By driving the first telescopic link 16 and the second telescopic link 17 to extend or retract respectively through push rod motors respectively equipped on the first telescopic link 16 and the second telescopic link 17, the inner flexible fan blade 4 or the outer flexible fan blade 3 is moved towards the central flexible fan blade 5, thereby realizing the adjustment of the overall wind-receiving area of ​​the flexible fan blade.

[0043] The elastic deformation of the flexible fan blade is mainly achieved by controlling the central flexible fan blade 5. By controlling the rotation of the motor with the eccentric structure, the motor pulls the first-stage elastic link 19 and the second-stage elastic link 20 through the eccentric structure. The first-stage elastic link 19 and the second-stage elastic link 20 pull or push the middle and end of the inner wall of the central flexible fan blade 5, respectively, thereby causing the central flexible fan blade to produce elastic deformation of contraction or expansion.

[0044] like Figure 4-7 As shown. The sidewalls of the central flexible fan blade 5, the inner flexible fan blade 4, and the outer flexible fan blade 3 are provided with wavy flexible deformable teeth 18, and the direction of the flexible deformable teeth 18 is parallel to the axis of the flexible blade.

[0045] The blade itself is a thin-walled hollow structure formed by stretching a symmetrical planar graphic with a rectangular bottom and a streamlined top. It has a set of deformable teeth, namely flexible deformable teeth 18, in both the rectangular and streamlined sections. These teeth are shaped like city wall crenellations, which can increase the limit of elastic deformation of the flexible blade under control.

[0046] like Figure 6 As shown, a first telescopic link 16 and a second telescopic link 17 are provided at both ends of the central flexible fan blade 5. A bracket is provided at the inner middle of the central flexible fan blade 5 and at the end of the inner flexible fan blade 4 away from the central flexible fan blade 5. A rubber cover is provided at the end of the outer flexible fan blade 3 away from the central flexible fan blade 5. The first telescopic link 16 is arranged between the rubber cover and the bracket of the central flexible fan blade 5, and the second telescopic link 17 is arranged between the bracket of the central flexible fan blade 5 and the bracket of the inner flexible fan blade 4.

[0047] like Figure 1 , Figure 9 , Figure 10 and Figure 11As shown, this is to achieve pitch control of a wind turbine. The pitch control device includes a pitch telescopic rod 6 hinged to the rotating main shaft 10, with the hinge between the pitch telescopic rod 6 and the rotating main shaft 10 perpendicular to the rotating main shaft 10. The middle part of the flexible blade is hinged to the movable end of the pitch telescopic rod 6. A push rod motor is installed inside the pitch telescopic rod 6, and the hinge pins at both ends of the pitch telescopic rod 6 are connected to motors that drive rotation. By controlling the rotation of the motor located between the pitch telescopic rod 6 and the rotating main shaft 10, the pitch telescopic rod 6 rotates around the hinge point between it and the rotating main shaft 10, thus achieving pitch adjustment. In addition, during pitch adjustment in the above manner, the angle of the flexible blade is controlled by the motor at the hinge point between the pitch telescopic rod 6 and the flexible blade, keeping the flexible blade in a vertical state. Of course, as a telescopic rod, the pitch telescopic rod 6 can extend or retract to drive the flexible blade to move, thereby achieving pitch adjustment.

[0048] like Figure 9 As shown, to prevent the flexible fan blades from colliding and being damaged by other structures of the generator during pitch adjustment and recovery, a top angle limiter 7 and a bottom angle limiter 9 are respectively provided at the top and bottom of the connection end between the pitch telescopic rod 6 and the rotating main shaft 10.

[0049] like Figure 1 As shown, to increase the rotational inertia of the fan blades, a fixed block is provided at the bottom of the connection end between the pitch telescopic rod 6 and the rotating main shaft 10. A round rod is movably hinged to the bottom end of the fixed block, and a centrifugal speed-increasing ball 8 is connected to the movable end of the round rod. A gap is provided between the rotating main shaft 10 and the fixed block, and the width of the gap is greater than the length of the round rod. The centrifugal speed-increasing ball 8 is driven to rotate when the wind turbine rotates, increasing the additional mass on the connecting rod, thereby increasing the rotational inertia of the flexible fan blades, increasing the torque of the wind turbine, and improving the power generation efficiency.

[0050] like Figure 2 and Figure 8 As shown, stable power generation of the generator is achieved when the input speed of the rotating main shaft 10 is unstable. The transmission speed regulating assembly includes a central toothed bevel 11 coaxially fixedly connected to the bottom end of the rotating main shaft 10. A connecting rod 26 is horizontally rotatably mounted on the fan base 1. One end of the connecting rod 26 is coaxially fixedly connected to a front engagement disc 21. The axis of the front engagement disc 21 is perpendicular to the axis of the central toothed bevel 11. The central toothed bevel 11 is surrounded by annularly distributed continuous grooves. The front engagement disc 21 meshes perpendicularly with the central toothed bevel 11. A gear disc is fixedly connected to the input shaft of the generator. The axis of the gear disc is perpendicular to the axis of the connecting rod 26. The top surface of the gear disc is coaxially provided with multiple annularly distributed continuous grooves. A telescopic rod 27 is coaxially slidably mounted on the end of the connecting rod 26 away from the rotating main shaft 10. A rear engagement disc 29 is coaxially fixedly connected to the movable end of the telescopic rod 27. The rear engagement disc 29 meshes perpendicularly with the continuous grooves.

[0051] like Figure 8 As shown. The connecting rod 26 is horizontally rotatably mounted on the fan base 1 via the first central bearing 24 and the second central bearing 25. The front engagement disc 21 and the rear engagement disc 29 are both composed of ring-shaped gears. The gears are evenly distributed around the axis of the connecting rod 26 and are rotatably mounted. Each gear can be inserted into a single groove of a continuous groove.

[0052] Twelve small bearings are rotatably mounted at equal angles on the outer side of the front engagement disc 21. These small bearings can mesh with the circular grooves at the bottom of the central gear bevel 11. The rotation of the small bearings greatly reduces wear on the parts, improves transmission efficiency, and reduces the probability of gear jamming. The rear engagement disc 29 adopts the same structure as the front engagement disc 21. Multiple circular grooves are arranged on the gear disc of the generator input shaft. The rear engagement disc 29 is driven by the telescopic rod 27 to engage with different numbers of circular grooves, achieving speed regulation. The gears on the front engagement disc 21 and the rear engagement disc 29 are rotatably mounted via the front fixing disc 22 and the rear fixing disc 28, respectively. A telescopic fixing device 23 is fixedly installed on the wind turbine base 1. The front fixing disc 22 is rotatably connected inside the telescopic fixing device 23. A first central bearing 24 and a second central bearing 25 are arranged inside the telescopic fixing device 23.

[0053] The generator adopts a three-phase squirrel-cage generator 15, which is distributed at equal angles around the rotating main shaft 10. There are three three-phase squirrel-cage generators 15 and three transmission speed regulating components.

[0054] A novel control algorithm for intelligent vertical axis wind turbines is proposed, which is an optimization algorithm based on a multi-objective particle swarm optimization model combining Cauchy mutation and differential evolution.

[0055] By setting the learning factors 1 and 2 and the weights as a function of fitness, instead of constant values, local convergence and premature convergence can be avoided during the iteration process, and the iteration can be made as close to the optimal value as possible.

[0056] First, the initialization function and boundary check function are set, followed by initialization of parameters: learning factor, weights, maximum and minimum values ​​of variables, population size, dimension, maximum number of iterations, velocity, and position. Then, the main loop is executed: the first generation population r1 and r2 are randomly generated, and the velocity is updated according to the basic formula during the first iteration.

[0057] v i =v i +c1r1(pbest i -x i )+c2r2(gbest i -x i )

[0058] Then set the learning factor and weight function:

[0059]

[0060]

[0061]

[0062] Where w(1) is the weight of the population r(1), t is the number of iterations in this round, and Maxiter is the maximum number of iterations. Then, the boundary function is called to update the velocity; values ​​exceeding the boundary range are taken (values ​​greater than the maximum are taken, and values ​​less than the minimum are taken). Next is the Cauchy mutation operation. First, the parameters η0 = 1.2 and ε = 0.1 are set, and then the parameter η is calculated:

[0063]

[0064] Then set the parameter div:

[0065]

[0066] If div n If ε < ε, then the updated value xnew is:

[0067] xnew n =xnew n-1 ×(1+W×η×tan((rand-0.5)π))

[0068] The first generation's xnew is the initial position. Then comes the Cauchy mutation operation, which involves mutating, crossovering, and selecting the population to obtain a new position xnew′. The latest position obtained from the Cauchy mutation and differential evolution is then weighted and summed in a 50 / 50 manner to obtain the new position point. The input value is wind speed, and the output values ​​are blade pitch (i.e., extension length), the degree of elastic deformation of the flexible blade, and the blade angle of attack. The specific objective function can be written according to the actual component parameters of the wind turbine. Then, the loop is repeated until the maximum number of iterations is reached, at which point the loop is exited and the optimal solution is obtained.

[0069] From the above specific implementation process, it can be concluded that the technical solution provided by the present invention has the following advantages or strengths compared with the prior art:

[0070] The technical solution of this application innovates the pitch, speed and intelligent control algorithms, which fills a certain technical gap and enables the vertical axis wind turbine to adjust its pitch and speed according to the current wind speed by relying on intelligent algorithms, so as to adapt to the current wind speed and achieve the goal of maximizing the utilization of wind energy.

Claims

1. A smart vertical axis wind turbine, characterized in that: The wind turbine base (1) includes a rotating main shaft (10) that is vertically rotatably mounted on the wind turbine base (1). The bottom end of the rotating main shaft (10) is connected to flexible fan blades through a pitch device. The flexible fan blades are equidistantly distributed around the axis of the rotating main shaft (10). The flexible blades are equipped with a blade control assembly that controls the axial length of the flexible blades and the shape of the windward surface of the flexible blades. The bottom end of the rotating main shaft (10) is connected to the input shaft of the generator arranged in the wind turbine base (1) through a transmission speed regulating assembly. The flexible blades are made of high-toughness shape memory alloy. The flexible blades include a central flexible fan blade (5) located in the middle, inner flexible fan blades (4) slidably fitted at both ends of the central flexible fan blade (5), and outer flexible fan blades (3) slidably fitted on the movable ends of the inner flexible fan blades (4). The blade control assembly includes a first telescopic link (16) and a second telescopic link (17) driven to extend and retract by a push rod motor. The first telescopic link (16) is located between the two outer flexible fan blades (3), and the second telescopic link (17) Located between two inner flexible fan blades (4), the central flexible fan blade (5) is equipped with a primary elastic link (19) and a secondary elastic link (20) that are driven to rotate by a motor. One end of the primary elastic link (19) and the secondary elastic link (20) are connected to the output shaft of the motor through an eccentric structure. The central flexible fan blade (5) includes a planar sidewall and an arc-shaped sidewall. The movable ends of the primary elastic link (19) and the secondary elastic link (20) are respectively connected to the middle part and the end part of the sidewall of the central flexible fan blade (5).

2. The intelligent vertical axis wind turbine generator as described in claim 1, characterized in that: The sidewalls of the central flexible fan blade (5), the inner flexible fan blade (4) and the outer flexible fan blade (3) are provided with wave-shaped flexible deformation teeth (18), and the direction of the flexible deformation teeth (18) is parallel to the axis of the flexible blade.

3. The intelligent vertical axis wind turbine generator as described in claim 1, characterized in that: The central flexible fan blade (5) and the inner flexible fan blade (4) are both provided with brackets at their inner middle parts and at the ends away from the central flexible fan blade (5). The outer flexible fan blade (3) is provided with a rubber cover at the ends away from the central flexible fan blade (5). The first telescopic link (16) is arranged between the rubber cover and the bracket of the central flexible fan blade (5). The second telescopic link (17) is arranged between the bracket of the central flexible fan blade (5) and the bracket of the inner flexible fan blade (4).

4. The intelligent vertical axis wind turbine generator as described in claim 1, characterized in that: The pitch control device includes a pitch telescopic rod (6) hinged to the rotating main shaft (10), and the hinge between the pitch telescopic rod (6) and the rotating main shaft (10) is perpendicular to the rotating main shaft (10). The middle part of the flexible blade is hinged to the movable end of the pitch telescopic rod (6). A push rod motor is installed inside the pitch telescopic rod (6), and the hinge pins of the hinges at both ends of the pitch telescopic rod (6) are connected to motors that drive rotation.

5. The intelligent vertical axis wind turbine generator as described in claim 4, characterized in that: The top and bottom of the connection end between the pitch telescopic rod (6) and the rotating main shaft (10) are respectively provided with a top angle limiter (7) and a bottom angle limiter (9).

6. The intelligent vertical axis wind turbine generator as described in claim 4, characterized in that: A fixed block is provided at the bottom of the connection end between the pitch telescopic rod (6) and the rotating main shaft (10). A round rod is movably hinged to the bottom end of the fixed block. A centrifugal speed-increasing ball (8) is connected to the movable end of the round rod. A gap is provided between the rotating main shaft (10) and the fixed block, and the width of the gap is greater than the length of the round rod.

7. The intelligent vertical axis wind turbine generator as described in claim 1, characterized in that: The transmission speed regulating assembly includes a central toothed bevel (11) coaxially fixedly connected to the bottom end of the rotating main shaft (10). A connecting rod (26) is horizontally rotatably mounted on the fan base (1). One end of the connecting rod (26) is coaxially fixedly connected to a front engagement disc (21). The axis of the front engagement disc (21) is perpendicular to the axis of the central toothed bevel (11). A continuous groove with annular distribution is provided around the central toothed bevel (11). The front engagement disc (21) meshes perpendicularly with the central toothed bevel (11). A toothed disc is fixedly connected to the input shaft of the generator. The axis of the toothed disc is perpendicular to the axis of the connecting rod (26). A continuous groove with multiple annular distribution is coaxially provided on the top surface of the toothed disc. A telescopic rod (27) is coaxially slidably mounted on the end of the connecting rod (26) away from the rotating main shaft (10). A rear engagement disc (29) is coaxially fixedly connected to the movable end of the telescopic rod (27). The rear engagement disc (29) meshes perpendicularly with the continuous groove.

8. The intelligent vertical axis wind turbine generator as described in claim 7, characterized in that: The connecting rod (26) is horizontally rotatably mounted on the fan base (1) via the first central bearing (24) and the second central bearing (25). The front engagement disc (21) and the rear engagement disc (29) are both composed of ring-shaped gears. The gears are evenly distributed around the axis of the connecting rod (26). The gears are rotatably mounted, and each gear can be inserted into a single groove of a continuous groove.

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