A wind turbine high-low air coordination precise wind-aiming device and a wind-aiming method thereof

Abstract

The application discloses a kind of wind turbine high-low air coordination precision wind alignment device and its wind alignment method, wind alignment device includes wind measurement flying device, cable take-up device, energy storage device and satellite communication device;The cable take-up device, energy storage device and satellite communication device are all installed at the top of wind turbine cabin, the cable take-up device is connected with wind measurement flying device by cable, and the cable take-up device is connected with wind measurement flying device communication, the satellite communication device is connected with wind measurement flying device communication, the wind measurement flying device, cable take-up device, energy storage device and satellite communication device are all connected with the main control system of wind turbine communication;The application effectively reduces the load of the whole machine under strong wind conditions, ensures that the load borne by the wind turbine is minimum, while combining the wind speed conditions of wind turbine operation, further improves the power generation capacity of wind turbine operation under the condition of ensuring the safety of wind turbine, increases power generation and income.

Description

Technical Field

[0001] This invention relates to the technical field of wind turbine yaw, and in particular to a high-low altitude coordinated precision wind-following device and wind-following method for wind turbines. Background Technology

[0002] During operation, wind turbines must maintain a minimal deviation from the wind direction to capture as much energy as possible. Significant yaw errors not only reduce the turbine's power capture performance but also increase the load on structural components. Therefore, improving the turbine's wind alignment accuracy is a prerequisite for maximizing its power output.

[0003] Currently, the main devices used for measuring wind direction changes are mechanical wind vanes and ultrasonic anemometers, which are relatively inexpensive and widely applicable. However, because the wind direction sensor is located at the top of the nacelle, it is affected by the impeller wake, resulting in a deviation between the measured data and the actual airflow direction. Furthermore, physical deviations can sometimes occur during wind direction calibration during turbine commissioning. For ultra-large megawatt-level wind turbines, lidar can be used for advanced wind speed and direction measurement to optimize yaw control accuracy. Lidar remotely senses wind speed and direction far ahead, enabling feedforward control of the turbine, increasing power generation and effectively reducing load. However, given the high cost of adding hardware such as lidar, existing equipment suffers from fixed biases and data acquisition lag, and data accuracy is affected by impeller obstruction and adverse weather conditions such as rain and fog.

[0004] Furthermore, yaw systems are now widely used in large wind turbines. Accurate wind alignment allows the turbine's rotor to capture more wind energy, resulting in significant improvements in power generation. Traditional horizontal-axis wind turbines consist of a rotor, nacelle, and tower. The rotor is connected to the nacelle via a main shaft, and the nacelle is mounted on top of the tower. A yaw system can be used to rotate the rotor around the tower's central axis, ensuring more accurate wind alignment. When the rotor faces the wind, the angle between the nacelle's axis and the actual wind direction (i.e., the yaw error) is minimized, maximizing the turbine's power output while reducing the additional load caused by rotor imbalance.

[0005] At sea or in coastal areas, typhoons pose a significant challenge to the safety of wind turbine generators. Therefore, the design of wind turbine generators for offshore or coastal use must consider how they can withstand typhoon conditions. Currently, existing technologies include strengthening the structural strength of individual components to enhance the typhoon resistance of wind turbine generators. However, this design approach not only increases investment costs but also cannot guarantee that the generator can withstand typhoons of varying intensities. In addition, there are control schemes such as passive or active yaw maneuvers to reduce load and improve the survivability of wind turbine generators under typhoon conditions. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing a high- and low-altitude coordinated precision wind alignment device and method for wind turbines. This provides a reliable and precise wind alignment solution for wind turbines to achieve remote active yaw to resist typhoons, effectively reducing the load on the entire unit under strong wind conditions and ensuring that the wind turbine bears the minimum load. At the same time, combined with the wind speed conditions of the wind turbine, it further improves the power generation capacity of the wind turbine while ensuring the safety of the wind turbine, thereby increasing power generation and revenue.

[0007] This invention is achieved through the following technical solution: a high-low altitude coordinated precision wind-measuring device for wind turbines, comprising a wind-measuring flight device, a cable retraction device, an energy storage device, and a satellite communication device; the cable retraction device, energy storage device, and satellite communication device are all installed on the top platform of the wind turbine nacelle; the cable retraction device is connected to the wind-measuring flight device via a cable, and is used to control the ascent and descent of the wind-measuring flight device by extending or retracting the cable; the cable retraction device is also communicatively connected to the wind-measuring flight device to acquire the attitude and environmental data of the wind-measuring flight device; the cable retraction device is electrically connected to the wind-measuring flight device; the energy storage device is electrically connected to the wind-measuring flight device; and the satellite communication device is communicatively connected to the wind-measuring flight device; the wind-measuring flight device, cable retraction device, energy storage device, and satellite communication device are all communicatively connected to the main control system of the wind turbine.

[0008] Furthermore, the wind measurement flight device has a built-in flight wind stabilization system for achieving stable flight in typhoon conditions.

[0009] Furthermore, the cable retraction device has a built-in wind-following rotation and stop locking mechanism for adjusting to the wind as it follows the wind-measuring flight device.

[0010] Furthermore, the cable retraction device has a built-in angle monitoring mechanism for monitoring its own angle against the wind.

[0011] Furthermore, the cable retraction device is connected to the lightning protection system of the wind turbine through a grounding cable.

[0012] Furthermore, the energy storage device includes an electrically connected photovoltaic solar panel and an energy storage battery, which are used to provide backup power for the wind measurement flight device.

[0013] The wind alignment method provided by the present invention, based on the above-mentioned wind turbine high-low altitude coordinated precision wind alignment device, includes the following steps:

[0014] The wind measurement flight device is preset with an initial wind speed. When the external wind speed is lower than the preset initial wind speed, the wind measurement flight device is in standby mode and is set on one side of the cable retraction device as an auxiliary monitoring device for wind speed and direction. At this time, the wind turbine uses the anemometer on the platform's wind measurement mast as the main wind-measuring device. When the external wind speed reaches the preset initial wind speed, the wind measurement flight device takes flight and enters a hovering state after reaching a preset altitude to perform real-time measurements. This provides data feedback to the wind turbine's main control system, thereby driving the wind turbine's active yaw system to operate, including yaw brake release, yaw drive start, yaw drive stop, and yaw brake, to achieve precise wind alignment of the wind turbine.

[0015] Simultaneously, the cable retraction device acquires attitude and environmental data from the wind-measuring flight device and follows the device to adjust to the wind. The angle of the adjustment is communicated to the main control system of the wind turbine and compared with the angle deviation value of the wind turbine's wind measurement system data. This activates the wind turbine to actively yaw until the angle deviation value is within the preset range, ensuring the accuracy of the turbine's yaw direction. In addition, the satellite communication device provides the wind turbine with accurate wind direction angle and trend information when the wind turbine is powered off, activating the wind turbine to actively yaw to the wind.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0017] This invention provides a reliable and precise wind alignment solution for wind turbines to achieve remote active yaw resistance against typhoons, effectively reducing the load on the entire unit under strong wind conditions and ensuring that the wind turbine bears the minimum load. At the same time, combined with the wind speed conditions of the wind turbine, it further improves the power generation capacity of the wind turbine while ensuring the safety of the wind turbine, thereby increasing power generation and revenue. In addition, by combining the wind speed and direction of the wind turbine with the anemometer on the platform's wind-measuring mast to test the wind alignment when the wind speed is low, the wind direction of the wind turbine can be guaranteed. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a wind turbine unit equipped with a wind-conducting device.

[0019] Figure 2This is a schematic diagram of a high- and low-altitude coordinated precision wind alignment device for wind turbine units. Detailed Implementation

[0020] The present invention will be further described below with reference to specific embodiments.

[0021] See Figures 1 to 2 As shown, the wind turbine high and low altitude coordinated precision wind matching device provided in this embodiment includes a wind measurement flight device 1, a cable reeling device 2, and an energy storage and communication device 3.

[0022] The energy storage and communication device 3 integrates an energy storage device and a satellite communication device; the cable retraction device 2, the energy storage device, and the satellite communication device are all installed on the top platform of the wind turbine nacelle 01; the cable retraction device 2 is connected to the wind measurement flight device 1 via a cable, and is used to control the ascent and descent of the wind measurement flight device 2 by extending or retracting the cable, that is, to control the release, hovering, and shutdown / recovery states of the wind measurement flight device 1. The cable retraction device 2 is also communicatively connected to the wind measurement flight device 1 to acquire the attitude and environmental data of the wind measurement flight device 1. The wind measurement flight device 1 has a built-in flight wind stabilization system to ensure stable flight under super typhoons below 80 m / s; simultaneously, the cable retraction device 2 is electrically connected to the wind measurement flight device 1 to supply power to it. The cable retraction device 2 is connected to the wind turbine's lightning protection system via a grounding cable; the cable retraction device 2 has a built-in... The system includes a wind-following rotation and shutdown locking mechanism for adjusting to the wind direction following the wind-measuring flight device 1; the cable retraction device 2 has a built-in angle monitoring mechanism for monitoring its own wind-following angle; the energy storage device is electrically connected to the wind-following flight device 1, and includes an electrically connected photovoltaic solar panel and an energy storage battery to provide backup power for the wind-following flight device 1, the energy storage battery being a lead-acid battery or a lithium battery; the satellite communication device is communicatively connected to the wind-following flight device 1, and combined with the backup power system of the wind turbine's diesel generator, enables the wind turbine to have the ability to remotely and automatically control the unit to actively yaw to the wind, providing accurate wind direction angle and trend information to the wind turbine when the wind turbine loses power, activating the wind turbine to actively yaw to the wind; the wind-following flight device 1, the cable retraction device 2, the energy storage device, and the satellite communication device are all communicatively connected to the main control system of the wind turbine (not shown in the figure).

[0023] The wind alignment method of the high and low altitude coordinated precision wind alignment device for wind turbines provided in this embodiment includes the following steps:

[0024] The wind measurement flight device 1 is preset to start at a wind speed. When the external wind speed is lower than the preset start wind speed, the wind measurement flight device 1 is in standby mode and is set on one side of the cable retraction device 2 as an auxiliary monitoring device for wind speed and direction. At this time, the wind turbine uses the anemometer on the platform's wind measurement mast as the main wind-measuring device. When the external wind speed reaches the preset start wind speed, the wind measurement flight device 1 takes flight and enters a hovering state after flying to a preset altitude. It performs real-time measurements and provides data feedback to the wind turbine's main control system, thereby driving the wind turbine's active yaw system to operate, including yaw brake release, yaw drive start, yaw drive stop, and yaw brake, to achieve precise wind alignment of the wind turbine.

[0025] Simultaneously, the cable retraction device 2 acquires the attitude and environmental data of the wind measurement flight device 1, and follows the wind measurement flight device 1 to adjust to the wind. The angle of the wind adjustment is communicated to the main control system of the wind turbine, and the angle deviation value is compared with the wind measurement system data of the wind turbine. The wind turbine is then activated to actively yaw until the angle deviation value of the wind turbine is within the preset range, thus ensuring the accuracy of the wind turbine's yaw direction. In addition, the satellite communication device provides the wind turbine with accurate wind direction angle and change trend information when the wind turbine is powered off, activating the wind turbine to actively yaw to the wind.

[0026] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Therefore, any changes made in accordance with the shape and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A wind alignment method for a high- and low-altitude coordinated precision wind alignment device for wind turbine units, characterized in that: The wind turbine high-low altitude coordinated precision wind-following device includes a wind measurement flight device, a cable retraction device, an energy storage device, and a satellite communication device. The cable retraction device, energy storage device, and satellite communication device are all installed on the top platform of the wind turbine nacelle. The cable retraction device is connected to the wind measurement flight device via a cable and is used to control the ascent and descent of the wind measurement flight device by extending or retracting the cable. The cable retraction device is also communicatively connected to the wind measurement flight device to acquire the attitude and environmental data of the wind measurement flight device. At the same time, the cable retraction device is electrically connected to the wind measurement flight device, the energy storage device is electrically connected to the wind measurement flight device, and the satellite communication device is communicatively connected to the wind measurement flight device. The wind measurement flight device, cable retraction device, energy storage device, and satellite communication device are all communicatively connected to the main control system of the wind turbine. The method of wind control includes the following steps: The wind measurement flight device is preset with an initial wind speed. When the external wind speed is lower than the preset initial wind speed, the wind measurement flight device is in standby mode and is set on one side of the cable retraction device as an auxiliary monitoring device for wind speed and direction. At this time, the wind turbine uses the anemometer on the platform's wind measurement mast as the main wind-measuring device. When the external wind speed reaches the preset initial wind speed, the wind measurement flight device takes flight and enters a hovering state after reaching a preset altitude to perform real-time measurements. This provides data feedback to the wind turbine's main control system, thereby driving the wind turbine's active yaw system to operate, including yaw brake release, yaw drive start, yaw drive stop, and yaw brake, to achieve precise wind alignment of the wind turbine. Simultaneously, the cable retraction device acquires attitude and environmental data from the wind-measuring flight device and follows the device to adjust to the wind. The angle of the adjustment is communicated to the main control system of the wind turbine and compared with the angle deviation value of the wind turbine's wind measurement system data. This activates the wind turbine to actively yaw until the angle deviation value is within the preset range, ensuring the accuracy of the turbine's yaw direction. In addition, the satellite communication device provides the wind turbine with accurate wind direction angle and trend information when the wind turbine is powered off, activating the wind turbine to actively yaw to the wind.

2. The wind alignment method of the high-low altitude coordinated precision wind alignment device for wind turbine units according to claim 1, characterized in that: The wind measurement flight device has a built-in flight wind stabilization system for stable flight in typhoon conditions.

3. The wind alignment method of the high-low altitude coordinated precision wind alignment device for wind turbine units according to claim 1, characterized in that: The cable retraction device has a built-in wind-following rotation and stop locking mechanism, which is used to adjust to the wind as the wind measurement flight device follows.

4. The wind alignment method of the high-low altitude coordinated precision wind alignment device for wind turbine units according to claim 1, characterized in that: The cable retraction device has a built-in angle monitoring mechanism to monitor its own angle against the wind.

5. The wind alignment method of the high-low altitude coordinated precision wind alignment device for wind turbine units according to claim 1, characterized in that: The cable retraction device is connected to the lightning protection system of the wind turbine through a grounding cable.

6. The wind alignment method of the high-low altitude coordinated precision wind alignment device for wind turbine units according to claim 1, characterized in that: The energy storage device includes an electrically connected photovoltaic solar panel and an energy storage battery, which is used to provide backup power for the wind measurement flight device.

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