A wind-solar hybrid power generation device based on a Venturi wind-gathering structure

Abstract

This invention discloses a wind-solar hybrid power generation device based on a Venturi wind-gathering structure, belonging to the field of new energy power generation technology. It includes a Venturi wind-gathering shroud, a vertical axis wind turbine, a generator, solar photovoltaic panels, an intelligent control system, as well as biomimetic blade protrusions, adaptive guide plates, and a piezoelectric energy recovery layer. The Venturi wind-gathering shroud has a ring-shaped structure with multiple air inlets along its circumference in the inlet section. The converging and diffusing sections create a Venturi effect, accelerating low-speed winds before they act on the vertical axis wind turbine at the throat. Biomimetic protrusions are provided on the leading edge of the blades to further reduce the starting wind speed; the guide plates can adaptively adjust their angle according to wind pressure; and the piezoelectric film converts pipe wall vibrations into electrical energy for sensor use. This invention achieves ultra-low wind speed start-up (1.0 m / s), improves wind energy utilization efficiency by more than 40%, and has self-powered detection capabilities. It is compact, safe, and reliable, suitable for distributed power generation in low-wind-speed areas.

Description

Technical Field

[0001] This invention relates to the field of new energy power generation technology, specifically to a wind-solar hybrid power generation device based on a Venturi wind-gathering structure. Background Technology

[0002] Wind and solar energy are two of the most common clean energy sources. However, traditional wind turbines suffer from problems such as high starting wind speeds (usually requiring winds of force 3 or higher, i.e., wind speed ≥ 3.4 m / s), sensitivity to wind direction, and extremely low power generation efficiency at low wind speeds, resulting in a significant waste of low-wind-speed energy. Meanwhile, solar power generation alone is greatly affected by day / night cycles and weather conditions, exhibiting poor stability.

[0003] While existing technologies include complementary power generation devices that combine wind and solar energy, most are structurally complex, resulting in limited improvements in wind energy utilization efficiency. For example, common horizontal-axis wind turbines require complex yaw systems to track wind direction; while traditional vertical-axis wind turbines, although eliminating the need for yaw, have relatively low wind energy capture efficiency, especially in low-wind-speed environments. Furthermore, some existing wind-gathering devices often focus only on wind intake from a single direction, failing to fully utilize multi-directional natural winds in the environment, and lack effective typhoon resistance and intelligent control mechanisms.

[0004] Regarding blade aerodynamic optimization, biomimetic blade patents already exist, primarily targeting horizontal axis fans or coaxial counter-rotating structures. Regarding guide vane adjustment, CN112983734A discloses automatic adjustment of independent guide vanes outside the wind turbine, but does not address angle adjustment of the integrated adaptive guide vane on the inner wall of the Venturi converging section. Regarding energy recovery, CN108155831B proposes a piezoelectric-wind energy composite harvesting device, but these are all independent devices, not integrated into the inner wall of the Venturi tube diffuser section.

[0005] Therefore, how to design an integrated device that can efficiently utilize low-wind-speed wind energy, achieve multi-directional wind capture, has a compact structure, and also has the function of solar-assisted power generation, and further improve the overall performance through biomimetic, adaptive and energy recovery technologies, is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0006] To address the aforementioned shortcomings in existing technologies, this invention provides a wind-solar hybrid power generation device based on a Venturi wind-gathering structure. It aims to solve the problems of high start-up wind speed, low efficiency at low wind speeds, strong dependence on wind direction, and instability in a single power generation mode inherent in traditional wind power generation. Furthermore, it further reduces start-up wind speed, improves power generation efficiency, and enhances the system's self-sufficiency through biomimetic structures, adaptive flow guidance, and piezoelectric energy recovery technology.

[0007] To solve the above problems, the technical solution provided by the present invention is as follows:

[0008] A wind-solar hybrid power generation device based on a Venturi wind-gathering structure includes:

[0009] The Venturi concentrator is a ring-shaped structure that is fitted outside the vertical axis impeller. The Venturi concentrator includes an air inlet section, a constriction section, a throat, and a diffuser section connected in sequence. The air inlet section has multiple air inlets along the circumference.

[0010] A vertical axis wind turbine is installed in the central region of the throat. The leading edge of the blades of the vertical axis wind turbine is provided with a biomimetic protrusion structure distributed in a sinusoidal pattern along the span direction. The amplitude of the protrusion is 2% to 5% of the chord length, and the wavelength is 20% to 30% of the chord length.

[0011] A generator, which is connected to the main shaft of the vertical axis wind turbine via a drive mechanism;

[0012] Solar photovoltaic panels are mounted on top of the Venturi wind collector;

[0013] An intelligent control system is electrically connected to the generator, the solar photovoltaic panel, and the actuator, respectively.

[0014] An arc-shaped air guide plate is disposed inside each of the air inlets and is hinged to the air shroud housing via a rotating shaft, and is driven by a shape memory alloy spring or a micro servo motor; the intelligent control system includes a differential pressure sensor for automatically adjusting the angle of the air guide plate within ±15° based on the measured inlet air dynamic pressure.

[0015] A PVDF piezoelectric film array, disposed on the inner wall of the diffusion section or at the throat outlet, is used to convert the micro-vibrations of the pipe wall caused by high-speed airflow into electrical energy, which is then connected to the DC bus to power the sensor and the central controller.

[0016] Construct an integrated power generation device that can capture wind from multiple directions, accelerate airflow using the Venturi effect, reduce start-up wind speed through a biomimetic structure, achieve wind-solar complementarity with photovoltaic panels, optimize intake airflow using adaptive guide plates, and recover vibration energy using the piezoelectric effect to power the detection system.

[0017] Optionally, the number of air inlets is even, and they are symmetrically and evenly distributed.

[0018] The number of air inlets is limited to an even number, which can be four or eight and symmetrically and evenly distributed to ensure that the device can receive wind from any direction of 360 degrees and eliminate blind spots in wind capture.

[0019] Optionally, the shrinkage ratio of the contraction section is 3:1 to 5:1; the inclination angle of the contraction section is 8° to 15°; and the inclination angle of the diffusion section is 5° to 10°.

[0020] To ensure a balance between airflow acceleration and flow stability.

[0021] Optionally, the vertical axis wind turbine has an odd number of blades.

[0022] Odd-numbered blades generate a more dispersed periodic excitation frequency distribution during rotation, avoiding the symmetrical resonance modes that may occur with even-numbered blades. This reduces structural vibration and aerodynamic noise, and improves operational stability and reliability.

[0023] Alternatively, the generator may be an external rotor permanent magnet synchronous generator.

[0024] External rotor permanent magnet synchronous generators are characterized by low starting torque. The rotor can overcome electromagnetic resistance and begin rotating at low speeds, and with the high-speed airflow accelerated by the Venturi, ultra-low wind speed start-up is achieved. Permanent magnet excitation requires no external power supply, reducing excitation losses and improving power generation efficiency.

[0025] Optionally, the intelligent control system includes a central controller, a wind speed sensor, a light sensor, and a voltage and current detection module; the actuator includes an adjustable flow guide baffle and / or an electromagnetic brake.

[0026] The central controller collects data from wind speed sensors, light sensors, and voltage and current detection modules to determine the current operating condition. When the wind speed exceeds the safety threshold, it controls the adjustable baffle to close or the electromagnetic brake to lock the wind turbine shaft to prevent overspeed damage. The light sensor is used to optimize the photovoltaic MPPT strategy, and the voltage and current detection is used for energy storage management and load distribution.

[0027] Optionally, the top of the Venturi wind-gathering hood is provided with an arc-shaped dome, and the solar photovoltaic panels are laid on the outer surface of the arc-shaped dome.

[0028] A curved dome covers the top of the wind collector, with photovoltaic panels attached to the curved surface, without affecting the airflow into the air inlet below. The curved shape facilitates smooth airflow over the top, reducing eddies and wind pressure, lowering the overall wind load, and maximizing the area for receiving solar radiation.

[0029] Alternatively, both the Venturi wind shroud and the vertical axis impeller are made of lightweight, high-strength composite materials.

[0030] Key components are manufactured using lightweight, high-strength composite materials such as carbon fiber and fiberglass, which significantly reduces the self-weight while ensuring structural strength, reduces the load on the supporting structure, lowers the rotational inertia of the wind turbine, facilitates startup at low wind speeds, and enhances typhoon resistance.

[0031] Optionally, it also includes an electrical system, which includes a rectifier, an MPPT controller, a DC bus, a bidirectional DC / DC converter, a battery pack, and an inverter.

[0032] The alternating current (AC) output from the generator is converted to direct current (DC) by a rectifier. The photovoltaic panels output DC power via an MPPT controller, and the two DC outputs are connected in parallel on the DC bus. A bidirectional DC / DC converter controls the charging and discharging of the battery based on its state of charge (SBC) to maintain stable bus voltage. The inverter converts the DC power back to AC to supply the load or connect to the grid. The MPPT controller tracks the maximum power point (MPP) of both the wind and solar power systems.

[0033] Optionally, the output power of the PVDF piezoelectric thin film array is in the range of 0.1 to 2W, and is connected to the DC bus through a rectifier and voltage regulator circuit.

[0034] The power of 0.1 to 2W is sufficient to meet the low-power operation requirements of the wind speed sensor, differential pressure sensor and central controller, so that the detection system does not require external power supply, thus improving the system's independence and reliability.

[0035] Compared with the prior art, the technical solution provided by this invention has the following advantages:

[0036] Ultra-low wind speed start-up and high-efficiency power generation: Through the acceleration effect of the Venturi wind shroud, light winds of 1-2 m / s can be accelerated to 5-10 m / s, reducing the start-up wind speed to 1.1 m / s, and improving the wind energy utilization coefficient by 40%-70% compared to the unshrouded structure.

[0037] Bionic enhancement, noise reduction and start-up speed reduction: The bionic protrusion structure at the leading edge of the blade works in synergy with the high-speed airflow field in the throat to further delay boundary layer separation, reduce the start-up wind speed by about 0.2 m / s, and reduce aerodynamic noise by 3-5 dB.

[0038] Adaptive flow guidance and full wind speed optimization: The adaptive adjustment mechanism of the guide vane angle can dynamically optimize the flow field of the contraction section in the low wind speed range (1~3m / s), which can improve the power generation efficiency by an additional 8%-12%.

[0039] Self-powered sensing, maintenance-free: The piezoelectric energy recovery layer provides self-power for sensors and control units, reducing reliance on external power supply and improving system reliability.

[0040] All-around wind capture, no need to yaw: The annular multi-directional air intake structure, combined with the arc-shaped deflector, can efficiently capture and utilize wind from any direction.

[0041] Wind and solar complementarity for stable power supply: By organically combining wind power generation and solar power generation, a complementary power supply can be achieved day and night, in both sunny and rainy weather.

[0042] Compact structure and reliable safety: The integrated design makes the device compact, occupies little space, and is easy to install and maintain. The intelligent control system has comprehensive overspeed protection, lightning protection, and overcurrent and overvoltage protection functions. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0044] Figure 2 This is a schematic diagram of a vertical axis wind turbine.

[0045] Figure 3 This is a cross-sectional schematic diagram of a vertical axis wind turbine;

[0046] Figure 4 This is a schematic diagram of a shape memory alloy spring.

[0047] Figure 5 This is a control flowchart of an embodiment of the present invention;

[0048] Figure 6 This is a partially enlarged schematic diagram of the biomimetic protrusion structure at the leading edge of the blade.

[0049] 1. Venturi concentrator; 11. Inlet section; 111. Inlet; 112. Arc-shaped guide vane; 1121. Shape memory alloy spring; 1122. Rotating shaft; 12. Contraction section; 13. Throat; 14. Diffusion section; 141. PVDF piezoelectric film array; 2. Vertical axis impeller; 21. Main shaft; 22. Blades; 220. Leading edge; 221. Bionic protrusion; 3. Generator; 4. Solar photovoltaic panel; 5. Arc-shaped dome. Detailed Implementation

[0050] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings and embodiments.

[0051] Example

[0052] Reference Figure 1-3 A wind-solar hybrid power generation device based on a Venturi wind-gathering structure includes a Venturi wind-gathering shroud 1, a vertical axis wind turbine 2, a generator 3, a solar photovoltaic panel 4, and an intelligent control system.

[0053] The Venturi concentrator 1 is a ring structure that is fitted onto the outside of the vertical axis impeller 2. The Venturi concentrator 1 is integrally formed from the air inlet section 11, the constriction section 12, the throat 13 and the diffuser section 14, and is made of lightweight high-strength composite material (carbon fiber reinforced polymer).

[0054] Reference Figure 2The air inlet section 11 has four rectangular air inlets 111 evenly spaced circumferentially. Each air inlet 111 is 200mm wide and 150mm high. Each air inlet 111 has an arc-shaped guide plate 112 inside. The guide plate is hinged to the air-collecting shroud housing via a rotating shaft 1122 and driven by a shape memory alloy spring 1121. The shape memory alloy spring 1121 is made of Ni-Ti based alloy with a phase transformation temperature set at 40℃. At room temperature, it is in a martensitic state and can be driven by electrical heating to undergo a phase transformation, generating deformation force that pushes the guide plate to rotate around the rotating shaft 1122. The adjustable angle range is ±15°.

[0055] The inner diameter of the contraction section 12 gradually decreases from the inlet section 11 to the throat 13, with an inlet diameter of 600 mm and a throat diameter of 300 mm. The contraction ratio is 4:1, and the inclination angle of the contraction section 12 is 12°. The throat 13 is the narrowest part of the air duct, with a length of 80 mm. A vertical axis impeller 2 is installed in the central area of ​​the throat 13.

[0056] The inner diameter of the diffuser section 14 gradually increases outward from the throat 13, with an outlet diameter of 500 mm and an inclination angle of 8°. Near the outlet of the throat 13, a PVDF piezoelectric film array 141 is attached to the inner wall of the diffuser section 14. Each array measures 50 mm × 30 mm × 0.1 mm, with 16 arrays evenly distributed around the circumference of the inner wall. The output of the PVDF piezoelectric film array 141 is connected to the DC bus 42 via a rectifier and voltage regulator circuit. When a high-speed airflow enters the diffuser section 14 through the throat 13, the pulsating pressure causes micro-vibrations in the pipe wall. The PVDF film generates an alternating voltage due to the piezoelectric effect, which is converted into a stable DC voltage after full-bridge rectification and capacitor filtering. This DC voltage is then boosted to 12V by a DC / DC boost circuit before being connected to the DC bus. Under a natural wind speed of 2 m / s, the measured wind speed at the throat is 6.5 m / s. At this time, the PVDF piezoelectric film array 141 can provide an auxiliary power of about 0.5 W, which is sufficient to meet the standby power consumption requirements of the wind speed sensor, differential pressure sensor and central controller.

[0057] Reference Figure 2 , 3 The vertical axis rotor 2 is installed in the central region of the throat 13. The vertical axis rotor 2 includes a main shaft 21 and multiple blades 22, with five blades (an odd number) evenly distributed along the circumference. The main shaft 21 passes through a bearing housing at the bottom of the diffuser section 14 and connects to the generator 3 located within the base. Each blade 22 features a large chord length and wide blade surface design, with a chord length of 120 mm, a span of 400 mm, and an installation angle of 15°. (Refer to...) Figure 4Each blade 22 has biomimetic protrusions 221 arranged in a sinusoidal pattern along its leading edge 220 in the span direction. The amplitude of the protrusions is 3% (3.6 mm) of the chord length, and the wavelength is 25% (30 mm) of the chord length. The biomimetic protrusions 221 are manufactured using a mold injection molding process. Corresponding sinusoidal grooves are machined at the leading edge 220 of the blade 22 mold, and carbon fiber reinforced nylon composite material is injected and molded in one step without the need for subsequent processing.

[0058] Generator 3 is driven by the main shaft 21 of the vertical axis wind turbine 2. Generator 3 is an external rotor permanent magnet synchronous generator with a rated power of 500W, a rated speed of 200rpm, and a starting torque of less than 0.05N·m. The three-phase AC power output by generator 3 is rectified into DC power by a three-phase rectifier bridge.

[0059] Solar photovoltaic panels 4 are mounted on top of a Venturi hood 1. A hemispherical arc-shaped dome 5, with a radius of 350mm, is located on top of the Venturi hood 1 and is made of transparent polycarbonate material. Multiple solar photovoltaic panels 4 are attached and fixed to the outer surface of the arc-shaped dome 5. The photovoltaic panels are monocrystalline silicon flexible modules, each with a power output of 50W, and six panels are connected in series for a total power output of 300W. The solar photovoltaic panels 4 output direct current via an MPPT controller.

[0060] Reference Figure 3 The intelligent control system is electrically connected to generator 3, solar photovoltaic panel 4, and actuators. The intelligent control system is based on a microcontroller (MCU), specifically a 32-bit industrial-grade MCU. An ultrasonic anemometer (accuracy ±0.1 m / s), a light sensor (silicon photovoltaic illuminometer, accuracy ±5%), and a differential pressure sensor (MEMS differential pressure sensor, range ±500 Pa, accuracy ±1 Pa) collect ambient wind speed, light intensity, and inlet dynamic pressure, respectively. A voltage and current detection module monitors the output voltage and current of generator 3, the output voltage and current of the photovoltaic panel, and the state of charge of the battery pack in real time. The wind speed sensor collects ambient wind speed signals in real time and transmits them to the central controller; the central controller has a built-in wind speed threshold (preset to 25 m / s). When the detected wind speed exceeds this threshold, it immediately sends a control command to the electric braking module. The electric braking module uses relays to directly short-circuit the three-phase output windings of the generator, forming a closed loop. At this time, the rotor of the wind turbine and the external rotor permanent magnet synchronous generator continues to rotate due to inertia. The rotating magnetic field of the rotor permanent magnet induces a large short-circuit current in the short-circuited stator winding. This short-circuit current generates an electromagnetic braking torque in the stator winding opposite to the direction of rotor rotation, exerting a strong damping effect on the rotor and rapidly dissipating the rotational kinetic energy of the wind turbine, causing the wind turbine to decelerate to a complete stop within seconds, achieving overspeed safety protection without mechanical wear. When the wind speed drops back to a safe range, the central controller controls the relay to disconnect, the braking is released, and the device resumes normal power generation.

[0061] The electrical system includes a rectifier, MPPT controller, DC bus, bidirectional DC / DC converter, battery bank, and inverter. The three-phase AC power output from generator 3 is converted to DC power by the rectifier, and the DC power output from solar photovoltaic panel 4 is connected in parallel on the DC bus via the MPPT controller. The rated voltage of the DC bus is 48V. The bidirectional DC / DC converter controls charging and discharging according to the state of charge (SOC) of the battery bank. Charging starts when the SOC is below 30% and stops when it is above 90%, maintaining the bus voltage stable at 48V±2V. The battery bank uses lithium iron phosphate batteries with a capacity of 100Ah. The inverter converts the DC power to 220V / 50Hz AC power to supply AC loads or connect to the public power grid via a grid-connected switch.

[0062] The MCU executes the following control logic based on the acquired data:

[0063] Normal operating mode: When the wind speed is between 1.0 m / s and 25 m / s, the MCU controls the MPPT controller and bidirectional DC / DC converter via PWM signals to perform maximum power point tracking for wind power and photovoltaic power generation respectively, and to perform intelligent charging and discharging management of the battery pack. The MPPT algorithm for wind power generation adopts the perturbation-observation method with a step size of 0.5V; the MPPT algorithm for photovoltaic power generation adopts the incremental conductance method with a step size of 0.2V.

[0064] Adaptive airflow guidance mode: The MCU calculates the optimal airflow guidance angle based on the real-time intake dynamic pressure data collected by the differential pressure sensor. When the intake dynamic pressure is below 20Pa (corresponding to a natural wind speed of approximately 1.5m / s), the MCU drives the shape memory alloy spring 1121 to heat up, adjusting the guide vane angle towards +15° to increase the inlet cross-sectional area and capture more airflow. When the intake dynamic pressure is above 100Pa (corresponding to a natural wind speed of approximately 4m / s), the MCU controls the shape memory alloy spring 1121 to de-energize and cool down, adjusting the guide vane angle towards -15° to reduce the inlet cross-sectional area and increase the airflow speed. In the intermediate dynamic pressure range, the guide vane angle is continuously adjusted within ±15° according to a linear interpolation formula, with an adjustment cycle of 5 seconds.

[0065] Overspeed protection mode: When the wind speed sensor detects that the wind speed exceeds the set safety threshold of 25 m / s, the MCU immediately issues a command to drive the servo motor to close the adjustable guide baffle located at the throat 13, and simultaneously activates the electromagnetic brake to lock the wind turbine main shaft 21, achieving dual protection. The adjustable guide baffle is a fan-shaped structure made of stainless steel, and the servo motor response time is less than 0.1 seconds. The electromagnetic brake is normally open, releasing when energized and locking when de-energized, with a response time of less than 0.05 seconds. When the wind speed drops below the safe value of 20 m / s for 30 seconds, the MCU automatically releases the electromagnetic brake and opens the adjustable guide baffle, restoring normal power generation mode.

[0066] Performance test data:

[0067] Under an average outdoor wind speed of 2 m / s, the measured start-up wind speed of the device was 1.0 m / s (further reduced due to the biomimetic protrusion 221). At a wind speed of 2 m / s, the measured wind speed at the throat 13 reached 6.5 m / s, the wind turbine speed stabilized at 120 rpm, and the generator 3 output voltage was 28VDC. Combined with a 300W solar photovoltaic panel 4, the entire device generates an average of 2.8 kWh of electricity per day, which is approximately 180% higher than a standalone wind turbine 3 without a wind-collecting shroud (average daily power generation of approximately 1.0 kWh) under the same conditions. The piezoelectric energy recovery layer can provide approximately 0.5W of auxiliary power at a wind speed of 2 m / s, meeting the standby power consumption of the sensor and MCU (approximately 0.3W in total), thus enabling the detection system to operate self-powered.

[0068] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A wind-solar hybrid power generation device based on a Venturi wind-gathering structure, characterized in that, include: The Venturi concentrator is a ring-shaped structure that is fitted outside the vertical axis impeller. The Venturi concentrator includes an air inlet section, a constriction section, a throat, and a diffuser section connected in sequence. The air inlet section has multiple air inlets along the circumference. A vertical axis wind turbine is installed in the central region of the throat. The leading edge of the blades of the vertical axis wind turbine is provided with a biomimetic protrusion structure distributed in a sinusoidal pattern along the span direction. The amplitude of the protrusion is 2% to 5% of the chord length, and the wavelength is 20% to 30% of the chord length. A generator, which is connected to the main shaft of the vertical axis wind turbine via a drive mechanism; Solar photovoltaic panels are mounted on top of the Venturi wind collector; An intelligent control system is electrically connected to the generator, the solar photovoltaic panel, and the actuator, respectively. An arc-shaped air guide plate is disposed inside each of the air inlets and is hinged to the air shroud housing via a rotating shaft, and is driven by a shape memory alloy spring or a micro servo motor; the intelligent control system includes a differential pressure sensor for automatically adjusting the angle of the air guide plate within ±15° based on the measured inlet air dynamic pressure. A PVDF piezoelectric film array, disposed on the inner wall of the diffusion section or at the throat outlet, is used to convert the micro-vibrations of the pipe wall caused by high-speed airflow into electrical energy, which is then connected to the DC bus to power the sensor and the central controller.

2. The wind-solar hybrid power generation device based on a Venturi wind-gathering structure according to claim 1, characterized in that, The number of air inlets is even, and they are symmetrically and evenly distributed.

3. The wind-solar hybrid power generation device based on a Venturi wind-gathering structure according to claim 1, characterized in that, The shrinkage ratio of the contraction section is 3:1 to 5:1; the inclination angle of the contraction section is 8° to 15°; and the inclination angle of the diffusion section is 5° to 10°.

4. The wind-solar hybrid power generation device based on a Venturi wind-gathering structure according to claim 1, characterized in that, The vertical axis wind turbine has an odd number of blades.

5. The wind-solar hybrid power generation device based on a Venturi wind-gathering structure according to claim 1, characterized in that, The generator is an external rotor permanent magnet synchronous generator.

6. The wind-solar hybrid power generation device based on a Venturi wind-gathering structure according to claim 1, characterized in that, The intelligent control system includes a central controller, a wind speed sensor, a light sensor, and a voltage and current detection module; the actuator includes an adjustable flow guide baffle and / or an electromagnetic brake.

7. The wind-solar hybrid power generation device based on a Venturi wind-gathering structure according to claim 1, characterized in that, The top of the Venturi wind-gathering hood is provided with an arc-shaped dome, and the solar photovoltaic panels are laid on the outer surface of the arc-shaped dome.

8. The wind-solar hybrid power generation device based on a Venturi wind-gathering structure according to claim 1 or 7, characterized in that, Both the Venturi wind-gathering shroud and the vertical axis impeller are made of lightweight, high-strength composite materials.

9. The wind-solar hybrid power generation device based on a Venturi wind-gathering structure according to claim 1, characterized in that, It also includes an electrical system, which includes a rectifier, an MPPT controller, a DC bus, a bidirectional DC / DC converter, a battery pack, and an inverter.

10. The wind-solar hybrid power generation device based on a Venturi wind-gathering structure according to claim 1, characterized in that, The output power range of the PVDF piezoelectric thin film array is 0.1 to 2W, and it is connected to the DC bus through a rectifier and voltage regulator circuit.

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