Self-circulating wind-driven machine system

Abstract

This invention discloses a self-circulating wind turbine system, belonging to the field of wind power generation technology. It includes: an air inlet duct module connecting a natural wind source to an air inlet gearbox, with a dust filter at the air inlet; and an air inlet gearbox module employing a continuously variable transmission (CVT) with a planetary gear set structure. The meshing state of the sun gear and planetary carrier is dynamically adjusted via an electromagnetic clutch. This invention generates a self-circulating airflow through a built-in wind turbine, combined with a dual-path variable-speed power generation design, eliminating the dependence of traditional wind power generation on the stability of natural wind. In remote scenarios without an external power grid or in emergency power supply needs, the flowing air within the air inlet and outlet ducts can be used to convert power into electricity via the air inlet and outlet gearboxes, respectively, achieving a dual function of "self-sustaining + external power supply," greatly improving the stability and autonomy of power supply.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, and more particularly to a self-circulating wind turbine drive system. Background Technology

[0002] Against the backdrop of ever-increasing energy demand and ever-growing requirements for energy supply stability, wind power, as a clean and renewable energy source, has received widespread attention and has been widely applied. However, existing wind power technologies face many pressing problems in practical applications, which severely limit the further development and large-scale application of wind power.

[0003] Traditional wind power systems are highly dependent on the stability of natural wind. Natural wind is intermittent and unpredictable, with wind speed and direction varying significantly over time, geographical location, and weather conditions. In remote areas without external power grids, such as mountains, islands, and deserts, the instability of natural wind prevents traditional wind power systems from providing a continuous and stable power output, making it difficult to meet the basic electricity needs of local residents and facilities. Furthermore, in emergency power supply scenarios, such as when the power grid collapses after a natural disaster, traditional wind power systems, due to their reliance on natural wind, cannot provide timely and reliable power support, severely impacting rescue efforts and the livelihoods of affected populations. Therefore, how to reduce dependence on the stability of natural wind and improve the stability and autonomy of power supply has become one of the key issues that urgently need to be addressed in the wind power industry.

[0004] Existing wind power systems suffer from significant shortcomings in improving power generation efficiency. On one hand, traditional wind power systems typically employ a single variable speed or transmission design, unable to flexibly adjust to varying wind speeds. Under conditions of significant natural wind speed variations, the transmission system struggles to maintain optimal operating conditions, resulting in low energy conversion efficiency. For example, some wind turbines fail to effectively capture wind energy at low wind speeds, while overload at high wind speeds may limit power generation efficiency. On the other hand, the design and operation of generators are relatively simplistic, lacking differentiated power generation strategies for various operating conditions. Different types of generators differ in power generation frequency and power characteristics, making it difficult for a single generator to meet complex and ever-changing electricity demands, leading to low overall system power generation efficiency.

[0005] Most current wind power systems lack effective dynamic optimization mechanisms for power generation. During actual operation, the system cannot detect changes in key operating parameters such as inlet wind speed, outlet air pressure, and generator output power in real time, and cannot dynamically adjust the transmission ratio and power generation strategy based on these parameters. This makes it difficult for the system to maintain optimal power generation under different operating conditions, thus failing to fully realize its power generation potential.

[0006] To address this, we offer a self-circulating wind turbine system. Summary of the Invention

[0007] The purpose of this invention is to solve the problems in the prior art by proposing a self-circulating wind turbine system.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] The self-circulating wind turbine system includes:

[0010] The air intake duct module connects the natural air source to the air intake gearbox, and its air inlet is equipped with a dust filter.

[0011] The air intake gearbox module adopts a continuously variable transmission device with a planetary gear set structure. It dynamically adjusts the meshing state of the sun gear and planet carrier through an electromagnetic clutch to achieve a continuous transmission ratio adjustment of 0.8-5.2.

[0012] The first-stage generator module is a permanent magnet synchronous generator with a constant power generation frequency of 50Hz. It is driven by the gearbox at the air inlet end to generate electricity and power the wind turbine.

[0013] The wind turbine module is powered by the first-stage generator, which produces a stable high-pressure airflow, which is output through the inlet and outlet pipes respectively.

[0014] The air outlet duct module transmits the airflow generated by the wind turbine to drive the power unit at the air outlet end;

[0015] The air outlet gearbox module uses a stepped transmission device with a fixed-axis gear set, and is set with 3 fixed transmission ratios, which automatically switch according to the airflow pressure of the wind-driven motor.

[0016] The second-stage generator module is an asynchronous generator that converts the mechanical energy at the air outlet into electrical energy. The power generation frequency is dynamically stabilized at 49.5-50.5Hz, and the generated power is supplied to external load equipment after rectification and voltage regulation.

[0017] The load device module, as the power terminal of the system, receives electrical energy provided by the second-stage generator.

[0018] Preferably, the continuously variable transmission (CVT) design of the air inlet gearbox precisely adjusts the transmission ratio according to the real-time changes in natural wind speed, enabling the system to operate efficiently under different wind speed conditions; the stepped transmission design of the air outlet gearbox selects the transmission ratio based on the power generation frequency of the second-stage generator, the number of magnetic pole pairs of the second-stage generator, and the initial speed driven by the air outlet airflow, and optimizes the transmission ratio for the stable airflow of the wind turbine to improve power generation efficiency.

[0019] Preferably, the first-stage generator provides stable and reliable electrical energy to the wind turbine, maintaining the system's self-circulating operation; the second-stage generator, after processing, provides standard-compliant electrical energy to external load equipment, meeting external power demand.

[0020] Preferably, it also includes an intelligent wind speed prediction and adaptive adjustment system. This system introduces advanced meteorological prediction algorithms and sensor technology to monitor and analyze the changing trend of wind speed in real time. Based on the predicted wind speed information, it adjusts the transmission ratio of the gearboxes at the air inlet and outlet in advance so that the system can maintain the best power generation efficiency under different wind speed conditions.

[0021] Preferably, it also includes an energy recovery and reuse device, which is installed at key component locations such as the gearbox and generator to recover energy such as frictional heat and electromagnetic loss generated during system operation and convert it into electrical energy for reuse.

[0022] Preferably, it also includes a remote monitoring and fault diagnosis system, establishing a remote monitoring platform, transmitting system operation data in real time through wireless communication technology, allowing users to view the system's operating status in real time on a remote terminal, and perform remote control and parameter adjustments; the system has fault diagnosis functions, automatically detecting and analyzing fault information in the system, and promptly sending alarm information to users.

[0023] Preferably, during system installation, the piping installation must ensure airtightness, and the dust filter at the air inlet must be cleaned and replaced regularly; during gearbox installation, the coaxiality must be strictly calibrated, and the transmission gears must be coated with special grease and the oil level checked regularly; during commissioning, the first-stage generator is first powered by an external power supply to verify the airflow output stability of the wind turbine, and then the system is switched to natural wind start-up, and the transmission ratio of the two-stage gearbox is gradually adjusted until the load power supply is stable. The power generation rate is verified through a dynamic optimization algorithm to ensure that the system meets the external power supply requirements.

[0024] Preferably, it also includes a multi-mode energy complementarity and intelligent switching system, which includes:

[0025] The energy monitoring module monitors parameters such as natural wind speed, light intensity, and system energy storage status in real time.

[0026] Energy storage modules, including battery packs and supercapacitors, are used to store excess electrical energy;

[0027] The energy switching control module, based on data provided by the energy monitoring module, uses intelligent algorithms to determine the current optimal energy supply mode and automatically controls the energy switching device to switch.

[0028] Auxiliary energy interface, with reserved access interfaces for auxiliary energy sources such as solar energy and diesel generators.

[0029] Preferably, the multi-mode energy complementarity and intelligent switching system has multiple operating modes, including:

[0030] In pure wind power generation mode, when there is sufficient natural wind speed, the system mainly relies on wind power to generate electricity, and supplies power to the load equipment through a self-circulating wind turbine system, and stores the excess electrical energy in the energy storage module;

[0031] In the wind-solar hybrid power generation mode, when there is sufficient sunlight and low wind speed during the day, the system simultaneously utilizes wind power and solar power to integrate the electrical energy of the two energy sources to power the load equipment and store excess electrical energy.

[0032] In the energy storage power supply mode, when natural wind speed and sunlight intensity are insufficient, the system automatically switches to the energy storage power supply mode and uses the electrical energy stored in the energy storage module to power the load equipment.

[0033] In the auxiliary energy power supply mode, when there is no wind or sunlight for a long time and the energy storage device has insufficient power, the system connects to auxiliary energy sources such as diesel generators through the auxiliary energy interface to provide power guarantee for the load equipment.

[0034] Preferably, the energy switching control module adopts an advanced intelligent switching algorithm, which comprehensively considers multiple factors such as natural wind speed, light intensity, load demand, and energy storage status. Through intelligent algorithms such as fuzzy control and neural networks, it determines the current optimal energy supply mode in real time and automatically controls the energy switching device to switch.

[0035] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0036] 1. By creating a self-circulating airflow through a built-in wind turbine and combining it with a dual-path variable-speed power generation design, it eliminates the dependence of traditional wind power generation on the stability of natural wind. In remote scenarios without an external power grid or in emergency power supply needs, it can utilize the airflow within the intake and exhaust ducts, respectively, to convert power into electricity through the intake and exhaust gearboxes, achieving a dual function of "self-sustaining + external power supply," greatly improving the stability and autonomy of power supply.

[0037] 2. The system employs a differentiated transmission and gearbox design at both ends. The inlet gearbox uses a continuously variable transmission (CVT) with a planetary gear set structure, which dynamically adjusts the transmission ratio according to the natural wind speed. The outlet gearbox uses a stepped transmission with a fixed-axis gear set, optimizing the transmission ratio to improve power generation efficiency for the stable airflow of the wind turbine. Simultaneously, the system features differentiated power generation and frequency control with two generators. The first-stage generator is a permanent magnet synchronous generator with a constant frequency of 50Hz, supplying power to the wind turbine. The second-stage generator is an asynchronous generator with a dynamically stable frequency of 49.5-50.5Hz, which, after rectification and voltage regulation, supplies power to external load equipment. This design ensures the system maintains high power generation efficiency under various operating conditions.

[0038] 3. The system collects real-time operating data such as inlet air velocity, outlet air pressure, and generator output power, and uses a PID control algorithm to dynamically adjust the gear ratio of the inlet gearbox to maximize external power supply efficiency. It can also employ algorithms such as genetic algorithms to optimize the gear ratio of the two-stage gearbox. Through continuous iteration and selection, the optimal gear ratio combination is found, further improving the system's power generation rate and ensuring that the system meets external power supply requirements. Attached Figure Description

[0039] Figure 1 This is a framework diagram of the self-circulating wind turbine system proposed in this invention;

[0040] Figure 2 This is a framework diagram of the multi-mode energy complementarity and intelligent switching system proposed in this invention. Detailed Implementation

[0041] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0042] Example, refer to Figure 1-2

[0043] This self-circulating wind turbine system mainly consists of an inlet duct, an inlet gearbox, a first-stage generator, a wind turbine, an outlet duct, an outlet gearbox, a second-stage generator, load equipment, and multiple auxiliary systems (a multi-mode energy complementarity and intelligent switching system, an intelligent wind speed prediction and adaptive adjustment system, an energy recovery and reuse device, and a remote monitoring and fault diagnosis system). It generates a self-circulating airflow through the built-in wind turbine, and combined with a dual-path variable-speed power generation design, it achieves self-sustaining operation and provides stable power to external systems even without stable natural wind.

[0044] The air intake gearbox adopts a planetary gear set structure, and the meshing state of the sun gear and planet carrier is dynamically adjusted by electromagnetic clutch to achieve a continuous transmission ratio adjustment of 0.8–5.2.

[0045] Its core control logic:

[0046]

[0047] in, , , , , .

[0048] The air outlet gearbox uses a fixed-axis gear set with three fixed transmission ratios (2.1, 3.5, 4.8), which automatically switch according to the airflow pressure of the wind-driven motor.

[0049] Selection criteria for transmission ratio:

[0050]

[0051] in, The power generation frequency for the second-stage generator is 50Hz. This refers to the number of pole pairs (2 pairs) of the second-stage generator. The initial rotational speed driven by the exhaust airflow.

[0052] The table below shows the differentiated power generation and frequency control for dual generators:

[0053] characteristic First-stage generator at the air inlet Second-stage generator at the air outlet type Permanent magnet synchronous generator asynchronous generator Power generation frequency A constant 50Hz frequency (achieved through continuously variable transmission). Dynamically stable at 49.5–50.5Hz (with inverter compensation) voltage level DC48V (directly powering the wind turbine) AC220V / 380V (powered to the load after inverter) Power range 0.5–2kW (Self-sustaining only) 5–20kW (Dedicated to external power supply)

[0054] Core calculation model for power generation optimization

[0055] The optimization objective of the system's total power generation rate is to maximize the efficiency of external energy supply. The core formula is:

[0056]

[0057] in, Power consumed by the load Input power to natural wind. Power is consumed by the self-circulating system.

[0058] Dynamic optimization algorithm:

[0059] By collecting real-time data on inlet air velocity, outlet air pressure, and generator output power, a PID control algorithm is used to dynamically adjust the gearbox ratio at the inlet end, so that:

[0060]

[0061] in, To achieve a self-sustaining power coefficient, the optimization objective is... Ensure the power supply to external sources .

[0062] The air intake duct connects the natural air source to the air intake gearbox, and a dust filter is installed at its inlet. The dust filter uses a multi-layered metal wire mesh structure to effectively filter dust, particles, and other impurities from the air, preventing them from entering the system and causing wear on components. The duct is made of high-strength, corrosion-resistant aluminum alloy, and the duct diameter is determined based on the system's design flow rate and air velocity requirements. Assuming the system's design air intake flow rate is... (Unit: m)3 / s), the average air velocity in the air inlet duct is (Unit: m / s), according to the flow rate formula (in The cross-sectional area of ​​the pipe is... , (where the pipe diameter is used), the appropriate pipe diameter can be calculated. For example, when designing the inlet airflow... =0.5m 3 / s, average wind speed When the speed is 5 m / s, the cross-sectional area of ​​the pipeline Then the pipe diameter .

[0063] The air intake gearbox employs a continuously variable transmission (CVT) with a planetary gear set structure. The planetary gear set consists of a sun gear, planet gears, and a ring gear. The meshing state of the sun gear and planet carrier is dynamically adjusted via an electromagnetic clutch, achieving a continuous transmission ratio adjustment from 0.8 to 5.2. The calculation formula is as follows: when the sun gear is the driving gear and the planet carrier is the driven gear, (in This refers to the number of teeth on the gear ring. (This refers to the number of teeth on the sun gear). When the ring gear is the driving gear and the planet carrier is the driven gear... By controlling the on / off state and current magnitude of the electromagnetic clutch, the relative motion state of the sun gear and planet carrier is changed, thereby achieving stepless change of the transmission ratio.

[0064] In actual operation, the transmission ratio is precisely adjusted according to real-time changes in natural wind speed. For example, when the natural wind speed is low, the transmission ratio is increased to allow the gearbox at the air inlet to output a higher speed, driving the first-stage generator to generate electricity; when the natural wind speed is high, the transmission ratio is decreased to prevent the first-stage generator from running too fast, ensuring that the system operates efficiently under different wind speed conditions.

[0065] The first-stage generator is a permanent magnet synchronous generator with a constant generating frequency of 50Hz. Its working principle is based on the law of electromagnetic induction. When the gearbox at the air intake drives the generator rotor to rotate, the magnetic field generated by the permanent magnets on the rotor moves relative to the stator windings, inducing an electromotive force in the stator windings. The relationship between the generator's output power P (unit: W) and the generator's speed n (unit: r / min) and torque T (unit: Nm) is as follows: .

[0066] In practical applications, the first-stage generator is adjusted by the gearbox at the air inlet to operate at a suitable speed, providing stable and reliable electrical energy to the wind turbine and maintaining the system's self-circulating operation.

[0067] The wind turbine is powered by a first-stage generator, producing a stable high-pressure airflow. Internally, it employs a highly efficient impeller design with optimized blade shape and angle to improve airflow conversion efficiency. When the electrical energy output from the first-stage generator drives the wind turbine's motor, the motor rotates the impeller, converting electrical energy into the kinetic energy of the airflow. Assuming the wind turbine's input power is Pin and its output airflow power is Pout, then the efficiency of the wind turbine is... By optimizing the impeller design and motor performance, the efficiency of the wind turbine is improved, enabling it to generate sufficient high-pressure airflow, which is then output through the inlet and outlet ducts respectively.

[0068] The outlet duct is used to transmit the airflow generated by the wind turbine, driving the power unit at the outlet. The duct is also made of high-strength, corrosion-resistant aluminum alloy, and its diameter is designed according to the required airflow rate and pressure. Similar to the inlet duct, it is designed according to the flow rate formula... Determine the appropriate pipe diameter to ensure that airflow can be smoothly transmitted to the power unit at the air outlet.

[0069] The air outlet gearbox employs a stepped transmission device with a fixed-axis gear set, offering three fixed transmission ratios (2.1, 3.5, and 4.8). The fixed-axis gear set consists of multiple gears fixed to a shaft, achieving different transmission ratios through the meshing of different gears. The transmission ratio is selected based on the second-stage generator's power generation frequency (50Hz), the number of pole pairs (2 pairs) of the second-stage generator, and the initial rotational speed driven by the airflow.

[0070] According to the synchronous speed formula of asynchronous generator (in Synchronous rotational speed, unit: r / min; The power generation frequency, in Hz; (where the number of pole pairs is 1), when =50Hz, When =2, synchronous speed The outlet gearbox selects an appropriate transmission ratio based on the initial speed driven by the outlet airflow, so that the input speed of the second-stage generator is close to the synchronous speed, thereby improving power generation efficiency. For example, when the initial speed driven by the outlet airflow is... (Unit: r / min), the selected transmission ratio is Then the input speed of the second-stage generator By adjusting make Approximately 1500 r / min.

[0071] The second-stage generator is an asynchronous generator that converts the mechanical energy at the air outlet into electrical energy. Its power generation frequency is dynamically stable between 49.5 and 50.5 Hz. During operation, the asynchronous generator rotates at a slightly lower speed than the synchronous speed, exhibiting a certain slip. The slip ratio formula is: ×100% (of which (This refers to the actual rotational speed of the generator). By adjusting the gearbox at the air outlet, the generator slip is controlled to keep the power generation frequency within a stable range.

[0072] The electrical energy generated by the second-stage generator is rectified and regulated to supply power to external load equipment. The rectifier circuit converts alternating current (AC) to direct current (DC), while the voltage regulator circuit ensures the stability of the output voltage. For example, using a three-phase bridge rectifier circuit, its output DC voltage U... d The relationship with the effective value of the input AC voltage U2 is as follows: The output voltage is adjusted by the voltage regulator circuit to meet the requirements of the external load equipment.

[0073] The load device, as the power consumption terminal of the system, receives electrical energy from the second-stage generator. The type and power of the load device are determined according to actual application requirements; for example, it could be lighting equipment, power tools, etc. During system operation, the output power of the second-stage generator is adjusted according to the needs of the load device to ensure its normal operation.

[0074] Energy monitoring module: Real-time monitoring of parameters such as natural wind speed, light intensity, and system energy storage status. It employs high-precision wind speed sensors, light intensity sensors, and power sensors to transmit the monitored data to the energy switching control module. For example, the wind speed sensor uses a hot-wire type, whose output signal is proportional to the wind speed; the light intensity sensor uses a photoresistor sensor, whose resistance value changes with light intensity, and a conversion circuit converts the resistance change into a voltage signal output.

[0075] Energy storage module: This includes a battery bank and a supercapacitor, used to store excess electrical energy. The battery bank uses lithium-ion batteries, which have advantages such as high energy density and long lifespan; the supercapacitor features fast charging and discharging speed and high power density. The capacity of the battery bank and supercapacitor is rationally configured according to the system's power generation and load demand. For example, when the system's power generation exceeds the load demand, excess electrical energy is stored in the battery bank and supercapacitor; when the system's power generation is insufficient, electrical energy is released from the battery bank and supercapacitor to power the load equipment.

[0076] Energy Switching Control Module: Based on data provided by the energy monitoring module, the system uses intelligent algorithms to determine the optimal energy supply mode and automatically controls the energy switching device to switch modes. Employing a fuzzy control algorithm, it uses parameters such as natural wind speed, sunlight intensity, load demand, and energy storage status as input variables. Through fuzzy reasoning and decision-making, it outputs the optimal energy supply mode. For example, when natural wind speed is sufficient, the system primarily relies on wind power generation, supplying power to the load equipment through a self-circulating wind turbine system and storing excess energy in the energy storage module. When sunlight is abundant and wind speed is low during the day, the system simultaneously utilizes wind and solar power generation, integrating the power from both energy sources to supply power to the load equipment and storing excess energy.

[0077] Auxiliary Energy Interface: Interfaces are reserved for connecting auxiliary energy sources such as solar power and diesel generators. The solar power interface uses solar photovoltaic panels and an inverter to convert solar energy into electrical energy and connect it to the system. The diesel generator interface connects to a diesel generator via a cable. When a diesel generator needs to be connected, an energy switching device switches the load equipment to diesel generator power supply mode.

[0078] This system incorporates advanced meteorological forecasting algorithms and sensor technology to monitor and analyze wind speed trends in real time. It employs time series analysis algorithms to model and predict historical wind speed data, combining this with real-time monitored data to improve forecast accuracy. For example, it uses an autoregressive moving average (ARMA) model to predict wind speed; the expression for the ARMA model is... (where X) t Let φ be the wind speed value at time t. i For autoregressive coefficients, θ j (where ϵt is the moving average coefficient and ϵt is the white noise sequence).

[0079] Based on predicted wind speed information, the gear ratios of the inlet and outlet gearboxes are adjusted in advance. For example, if an increase in wind speed is predicted, the gear ratio of the inlet gearbox is reduced and the gear ratio of the outlet gearbox is increased in advance, so that the system maintains optimal power generation efficiency under different wind speed conditions.

[0080] Energy recovery devices are installed in key components such as the gearbox and generator to recover energy generated during system operation, such as frictional heat and electromagnetic losses. For example, a thermoelectric conversion device is installed in the gearbox bearings to convert frictional heat into electrical energy; an electromagnetic energy recovery device is installed in the generator windings to recover electromagnetic loss energy. The recovered electrical energy is integrated and converted through energy management circuitry before being fed back into the system to power load equipment or stored in energy storage modules.

[0081] A remote monitoring platform is established to transmit system operating data in real time via wireless communication technologies (such as GPRS and Wi-Fi). A data acquisition module is installed in the system to collect and transmit the operating parameters of each component (such as speed, temperature, voltage, and current) to the remote monitoring platform. Users can view the system's operating status in real time on remote terminals (such as computers and mobile phones) and perform remote control and parameter adjustments.

[0082] The system has fault diagnosis capabilities, employing expert systems and neural network algorithms to automatically detect and analyze fault information within the system. For example, by monitoring the voltage and current waveforms of the generator, it can determine whether there are faults such as short circuits or open circuits; by monitoring the temperature and vibration signals of the transmission, it can determine whether there are problems such as wear or malfunctions in the transmission. When a fault is detected, the system promptly sends alarm information to the user and provides fault diagnosis results and maintenance suggestions.

[0083] Piping Installation: Air inlet and outlet ducts must be installed to ensure airtightness. Flange connections or welding should be used, and sealant should be applied to the joints. After installation, an airtightness test should be performed using either a pneumatic or hydrostatic test to ensure there are no leaks.

[0084] Gearbox Installation: The inlet and outlet gearboxes must be strictly aligned for coaxiality during installation. A laser alignment instrument should be used for calibration to ensure that the coaxiality error of the input and output shafts is within the specified range. The transmission gears must be coated with special grease, and the oil level should be checked regularly to ensure proper gear lubrication.

[0085] Installation of other components: Install the first-stage generator, wind turbine, second-stage generator, load equipment, and other components according to the design requirements, ensuring that the connections between the components are firm and reliable.

[0086] Simulated power supply debugging: First, simulate the power supply of the first-stage generator using an external power source to verify the stability of the airflow output of the wind turbine. Adjust the voltage and frequency of the external power source to make the wind turbine operate under different input power levels, monitor the airflow rate and pressure, and ensure stable airflow output.

[0087] Natural wind start-up and commissioning: Switch to natural wind start-up and gradually adjust the gear ratios of the two-stage gearbox. Adjust the gear ratio of the inlet gearbox in real time according to the changes in natural wind speed to stabilize the power generation frequency of the first-stage generator at 50Hz; at the same time, select an appropriate gear ratio of the outlet gearbox according to the initial speed driven by the outlet airflow to stabilize the power generation frequency of the second-stage generator at 49.5-50.5Hz.

[0088] Power Generation Rate Verification: The power generation rate is verified using a dynamic optimization algorithm to ensure the system meets the power supply requirements. The dynamic optimization algorithm adjusts the operating parameters of each component based on real-time system data (such as wind speed, engine speed, and power) to maximize the system's power generation rate. For example, a genetic algorithm is used to optimize the transmission ratios of a two-stage gearbox. Through continuous iteration and selection, the optimal combination of transmission ratios is found to improve the system's power generation rate.

[0089] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A self-circulating wind turbine drive system, characterized in that, include: The air intake duct module connects the natural air source to the air intake gearbox, and its air inlet is equipped with a dust filter. The air intake gearbox module adopts a continuously variable transmission device with a planetary gear set structure. It dynamically adjusts the meshing state of the sun gear and planet carrier through an electromagnetic clutch to achieve a continuous transmission ratio adjustment of 0.8-5.

2. The first-stage generator module is a permanent magnet synchronous generator with a constant power generation frequency of 50Hz. It is driven by the gearbox at the air inlet end to generate electricity and power the wind turbine. The wind turbine module is powered by the first-stage generator, which produces a stable high-pressure airflow, which is output through the inlet and outlet pipes respectively. The air outlet duct module transmits the airflow generated by the wind turbine to drive the power unit at the air outlet end; The air outlet gearbox module uses a stepped transmission device with a fixed-axis gear set, and is set with 3 fixed transmission ratios, which automatically switch according to the airflow pressure of the wind-driven motor. The second-stage generator module is an asynchronous generator that converts the mechanical energy at the air outlet into electrical energy. The power generation frequency is dynamically stabilized at 49.5-50.5Hz, and the generated power is supplied to external load equipment after rectification and voltage regulation. The load device module, as the power terminal of the system, receives electrical energy provided by the second-stage generator.

2. The self-circulating wind turbine system according to claim 1, characterized in that, The continuously variable transmission (CVT) design of the air inlet gearbox precisely adjusts the transmission ratio according to the real-time changes in natural wind speed, enabling the system to operate efficiently under different wind speed conditions. The stepped transmission design of the air outlet gearbox selects the transmission ratio based on the power generation frequency of the second-stage generator, the number of magnetic pole pairs of the second-stage generator, and the initial speed driven by the airflow. The transmission ratio is optimized for the stable airflow of the wind turbine to improve power generation efficiency.

3. The self-circulating wind turbine system according to claim 1, characterized in that, The first-stage generator provides stable and reliable power to the wind turbine, maintaining the system's self-circulating operation; the second-stage generator, after processing, provides standard-compliant power to external load equipment, meeting external power demands.

4. The self-circulating wind turbine system according to claim 1, characterized in that, It also includes an intelligent wind speed prediction and adaptive adjustment system. This system introduces advanced meteorological prediction algorithms and sensor technology to monitor and analyze wind speed changes in real time. Based on the predicted wind speed information, it adjusts the transmission ratio of the gearboxes at the air inlet and outlet in advance, so that the system can maintain the best power generation efficiency under different wind speed conditions.

5. The self-circulating wind turbine system according to claim 1, characterized in that, It also includes energy recovery and reuse devices, which are installed in key components such as gearboxes and generators to recover energy such as frictional heat and electromagnetic losses generated during system operation and convert it into electrical energy for reuse.

6. The self-circulating wind turbine system according to claim 1, characterized in that, It also includes a remote monitoring and fault diagnosis system, which establishes a remote monitoring platform and transmits system operation data in real time through wireless communication technology. Users can view the system's operating status in real time on a remote terminal and perform remote control and parameter adjustment. The system has a fault diagnosis function, which automatically detects and analyzes fault information in the system and sends alarm information to users in a timely manner.

7. The self-circulating wind turbine system according to claim 1, characterized in that, During system installation, the piping must be airtight, and the dust filter at the air inlet must be cleaned and replaced regularly. The gearbox must be strictly calibrated for coaxiality, and the transmission gears must be coated with special grease and the oil level checked regularly. During commissioning, first, the first-stage generator is powered by an external power supply to verify the stability of the wind turbine's airflow output. Then, the system is switched to natural wind start-up, and the transmission ratios of the two gearboxes are gradually adjusted until the load power supply is stable. The power generation rate is verified through a dynamic optimization algorithm to ensure the system meets the external power supply requirements.

8. The self-circulating wind turbine system according to claim 1, characterized in that, It also includes a multi-mode energy complementarity and intelligent switching system, which includes: The energy monitoring module monitors parameters such as natural wind speed, light intensity, and system energy storage status in real time. Energy storage modules, including battery packs and supercapacitors, are used to store excess electrical energy; The energy switching control module, based on data provided by the energy monitoring module, uses intelligent algorithms to determine the current optimal energy supply mode and automatically controls the energy switching device to switch. Auxiliary energy interface, with reserved access interfaces for auxiliary energy sources such as solar energy and diesel generators.

9. The self-circulating wind turbine system according to claim 8, characterized in that, The multi-mode energy complementarity and intelligent switching system has multiple operating modes, including: In pure wind power generation mode, when there is sufficient natural wind speed, the system mainly relies on wind power to generate electricity, and supplies power to the load equipment through a self-circulating wind turbine system, and stores the excess electrical energy in the energy storage module; In the wind-solar hybrid power generation mode, when there is sufficient sunlight and low wind speed during the day, the system simultaneously utilizes wind power and solar power to integrate the electrical energy of the two energy sources to power the load equipment and store excess electrical energy. In the energy storage power supply mode, when natural wind speed and sunlight intensity are insufficient, the system automatically switches to the energy storage power supply mode and uses the electrical energy stored in the energy storage module to power the load equipment. In the auxiliary energy power supply mode, when there is no wind or sunlight for a long time and the energy storage device has insufficient power, the system connects to auxiliary energy sources such as diesel generators through the auxiliary energy interface to provide power guarantee for the load equipment.

10. The self-circulating wind turbine system according to claim 8, characterized in that, The energy switching control module adopts an advanced intelligent switching algorithm, which comprehensively considers multiple factors such as natural wind speed, light intensity, load demand, and energy storage status. Through intelligent algorithms such as fuzzy control and neural networks, it determines the current optimal energy supply mode in real time and automatically controls the energy switching device to switch.

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