A wind power tower with adjustable height and adjustment method thereof

Abstract

The invention discloses a wind power tower with adjustable height and an adjustment method thereof, which belongs to the technical field of wind power generation, and solves the problem that the existing wind power tower cannot maximize the utilization of wind energy resources due to the fixed height; the wind power tower comprises a wind power tower body, the wind power tower body comprises a tower assembly, at least one lifting assembly is arranged at the bottom of the tower assembly, a plurality of wind speed measuring assemblies are arranged on the tower assembly in the vertical direction, and the top of the tower assembly is connected to a wind turbine. The controller of the invention collects wind condition data at different heights in real time through a plurality of wind speed measuring assemblies, and obtains the height and wind direction of the current maximum wind speed in real time. Compared with directly using the wind condition data fed back by the wind turbine, the wind speed measuring assembly has a wider measurement range and higher measurement accuracy; the controller changes the height of the tower assembly through the lifting assembly, moves the wind turbine to the height of the maximum wind speed, and uses a yaw device to make the wind turbine face the wind direction of the maximum wind speed, so as to maximize the utilization of wind energy resources.

Description

Technical Field

[0001] The invention relates to the technical field of wind power generation, and in particular to a wind power tower with adjustable height and an adjustment method thereof. Background Art

[0002] With the rapid development of wind power, the demand for wind power is also gradually increasing. However, there are still some urgent problems to be solved in the wind power field, such as the instability of wind speed. Under different weather conditions, the wind speed at different heights will vary greatly. Traditional wind towers are fixed in height and are greatly affected by the wind speed at the current location. They cannot maximize the use of wind energy resources and reduce the power generation efficiency of wind towers.

[0003] In order to solve the above problems, a Chinese patent with publication number CN117231428A discloses an offshore floating wind turbine with adjustable height and a control method thereof, including a wind turbine, a semi-submersible floating platform, a multifunctional pumped water lifting pile, and a hydraulic power lifting system. The control method formulates a wind turbine height control strategy based on the wind condition data of the wind turbine, which can ensure the maximum utilization of wind energy resources and marine resources under the stable operation of the offshore floating wind turbine with adjustable height.

[0004] However, this invention obtains wind condition data through the rotation speed or power generation of the wind turbine to determine the wind force, and is unable to directly collect wind force data at different heights. Summary of the invention

[0005] In view of the above problems in the prior art, the present invention provides a wind power tower with adjustable height and an adjustment method thereof, which solves the problem that the existing wind power tower cannot maximize the utilization of wind energy resources due to its fixed height.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] On the one hand, a height-adjustable wind tower is provided, comprising a wind tower body, the wind tower body comprising a tower assembly, at least one lifting assembly is arranged at the bottom of the tower assembly, a plurality of wind speed measuring assemblies are arranged on the tower assembly in a vertical direction, and the top of the tower assembly is connected to a wind turbine set; the wind turbine set comprises a cabin rotatably connected to the tower assembly through a yaw device, a control system and a generator are arranged inside the cabin, the control system comprises a controller, a vibration sensor and a temperature sensor, the vibration sensor and the temperature sensor are arranged on the generator, and the controller is electrically connected to each lifting assembly, each wind speed measuring assembly, the generator, the vibration sensor and the temperature sensor, respectively.

[0008] In this solution, the controller collects wind data at different heights in real time through multiple wind speed measurement components, and obtains the height and wind direction of the current maximum wind speed in real time. Compared with directly using the wind data fed back by the wind turbine, the wind speed measurement component has a wider measurement range and higher measurement accuracy; the controller changes the height of the tower assembly through the lifting assembly, moves the wind turbine to the height of the maximum wind speed, and uses the yaw device to make the wind turbine face the wind direction of the maximum wind speed, so as to maximize the use of wind energy resources and solve the problem of inaccurate wind prediction affecting the power generation efficiency of wind turbine towers. The controller can monitor the status of the generator in real time through vibration sensors and temperature sensors to avoid overload of the generator in extreme weather and ensure the safe operation of the wind turbine.

[0009] Furthermore, the tower assembly comprises at least two slidably connected tower sections, and a lifting assembly is arranged between the bottoms of two adjacent tower sections. The two adjacent tower sections can be telescoped and retracted to change height through the lifting assembly.

[0010] Furthermore, the lifting assembly is a scissor-type hydraulic lifting platform, and the top and bottom of the hydraulic lifting platform are respectively fixed on the bottoms of two adjacent tower sections.

[0011] Furthermore, a slot for engaging with the hydraulic lifting platform is provided on the bottom of each tower section, and the provision of the slot facilitates the fixed connection between the tower section and the hydraulic lifting platform.

[0012] Furthermore, a plurality of receiving grooves are provided on all sides of the tower section at the top in the vertical direction, each receiving groove corresponds to each wind speed measuring assembly, and each wind speed measuring assembly is installed in the corresponding receiving groove. The arrangement of the receiving grooves provides installation space for the wind speed measuring assembly without affecting the extension and retraction of the tower section.

[0013] Furthermore, each wind speed measurement assembly includes a telescopic member, the fixed end of the telescopic member is fixed in the receiving groove, an L-shaped electric shaft is provided on the telescopic end of the telescopic member, a wind speed sensor is fixed on the free end of the electric shaft, and the electric shaft is used to drive the wind speed sensor to rotate to change the measuring position of the wind speed sensor. The telescopic member stores the wind speed sensor in the receiving groove when the tower section is retracted, and can also move the wind speed sensor to the outside when the tower section is extended. The electric shaft is used to rotate and move the wind speed sensor thereon on a horizontal plane to change the measuring position of the wind speed sensor, and the controller can obtain the rotation angle of the wind speed sensor at the maximum wind speed in the rotation range to obtain the wind direction.

[0014] Furthermore, the wind speed sensor is a three-cup mechanical wind speed sensor.

[0015] In another aspect, a method for adjusting a height-adjustable wind turbine tower is provided, comprising the following steps:

[0016] S1. Multiple wind speed measurement components collect wind condition data at different heights in real time, and obtain the height corresponding to the maximum wind speed and the wind direction of the maximum wind speed in real time;

[0017] S2, moving the wind turbine generator set to the height in step S1, and making the blades of the wind turbine generator set face the wind direction in step S1.

[0018] Furthermore, the method for obtaining the wind direction of the wind speed in step S1 is: using a telescopic part to move the wind speed sensor outside the accommodating groove, and using an automatic rotating shaft to rotate the wind speed sensor on the horizontal plane, obtaining the rotation angle of the wind speed sensor with the maximum wind speed in the rotation range, and using the rotation angle to obtain the wind direction.

[0019] Furthermore, vibration sensors and temperature sensors are used to monitor the vibration data and temperature data of the generator in real time. If the vibration data and temperature data exceed the threshold, the controller stops the generator and sounds an alarm, and at the same time causes the lifting assembly to drive the tower assembly to move to the lowest position, otherwise it operates normally.

[0020] The present invention discloses a wind power tower with adjustable height and an adjustment method thereof, and the beneficial effects thereof are:

[0021] The controller of the present invention collects wind condition data at different heights in real time through multiple wind speed measurement components, and obtains the height and wind direction of the current maximum wind speed in real time. Compared with directly using the wind condition data fed back by the wind turbine set, the wind speed measurement component has a wider measurement range and higher measurement accuracy; the controller changes the height of the tower assembly through the lifting assembly, moves the wind turbine set to the height of the maximum wind speed, and uses the yaw device to make the wind turbine set face the wind direction of the maximum wind speed, thereby maximizing the utilization of wind energy resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of a wind power tower;

[0023] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0024] Figure 3 for Figure 1 The enlarged view of point B in the middle;

[0025] Figure 4 is a schematic diagram of the structure of the lifting assembly;

[0026] Figure 5 It is a schematic diagram of the connection between the tower section and the lifting assembly;

[0027] Among them: 1. Wind turbine; 11. Nacelle; 12. Main shaft; 121. Main bearing seat; 13. Hub; 14. Blade; 15. Gearbox; 16. Generator; 2. Yaw device; 3. Tower assembly; 31. Tower section; 311. Receiving groove; 312. Card slot; 4. Wind speed measurement assembly; 41. Telescopic part; 42. Electric shaft; 43. Wind speed sensor; 5. Lifting assembly; 51. Support platform; 52. Scissor bracket; 53. Hydraulic cylinder; 54. Safety leg. DETAILED DESCRIPTION

[0028] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0029] Example 1

[0030] refer to Figure 1 This embodiment provides a height-adjustable wind tower, including a wind tower body, wherein the wind tower body includes a wind turbine group 1, a yaw device 2, a tower assembly 3, a plurality of wind speed measurement assemblies 4 and a lifting assembly 5.

[0031] The wind turbine generator set 1 is used to convert wind energy into electrical energy and is disposed on the top of a tower assembly 3. The wind turbine generator set 1 comprises a nacelle 11, and a control system and a generator 16 are disposed inside the nacelle 11.

[0032] The control system includes a controller, a vibration sensor and a temperature sensor, which are arranged on the generator 16. The controller is electrically connected to each lifting assembly 5, each wind speed measuring assembly 4, the generator 16, the vibration sensor and the temperature sensor. The controller can monitor the status of the generator 16 in real time through the vibration sensor and the temperature sensor, avoid overloading of the generator 16 in extreme weather, and ensure the safe operation of the wind turbine 1.

[0033] The yaw device 2 is used to make the wind turbine 1 face the wind direction, and the nacelle 11 is rotatably connected to the tower assembly 3 through the yaw device 2.

[0034] The tower assembly 3 is used to support the wind turbine 1 , and the top of the tower assembly 3 is connected to the wind turbine 1 via the yaw device 2 .

[0035] The multiple wind speed measuring components 4 are used to collect wind condition data at different heights in real time. The multiple wind speed measuring components 4 are fixed around the tower component 3 in the vertical direction.

[0036] The lifting assembly 5 is used to change the height of the tower assembly 3 to move the wind turbine 1 to a height position where the wind speed is maximum. The lifting assembly 5 is arranged in the inner bottom of the tower assembly 3 .

[0037] In this embodiment, the controller collects wind condition data at different heights in real time through multiple wind speed measurement components 4, and obtains the height and wind direction of the current maximum wind speed in real time. Compared with directly using the wind condition data fed back by the wind turbine 1, the wind speed measurement component 4 has a wider measurement range and higher measurement accuracy. The height of the tower component 3 is changed by the lifting component 5 to move the wind turbine 1 to the height of the maximum wind speed, and the yaw device 2 is used to make the wind turbine 1 face the wind direction of the maximum wind speed, thereby maximizing the utilization of wind energy resources and solving the problem of affecting the power generation efficiency of the wind tower due to inaccurate wind force prediction.

[0038] Specifically, refer to Figure 3 A main shaft 12 is rotatably arranged inside the nacelle 11 through a main bearing seat 121, a hub 13 is arranged on one end of the main shaft 12, and a plurality of blades 14 are arranged on the hub 13; the other end of the main shaft 12 is meshedly connected to the input end of a gear box 15, and the output end of the gear box 15 is meshedly connected to a generator 16.

[0039] Specifically, the tower assembly 3 includes at least two slidably connected tower sections 31, and a lifting assembly 5 is disposed between the bottoms of two adjacent tower sections 31. The two adjacent tower sections 31 can be telescoped to change height through the lifting assembly 5. Of the two adjacent tower sections 31, the diameter of the tower section 31 located at the upper side is smaller than the diameter of the tower section 31 located at the lower side.

[0040] Preferably but not limited to, the tower assembly 3 of this embodiment includes three slidingly connected tower sections 31 .

[0041] Specifically, the lifting assembly 5 is a scissor-type hydraulic lifting platform, and the top and bottom of the hydraulic lifting platform are respectively fixed on the bottoms of two adjacent tower sections 31 .

[0042] The hydraulic lifting platform includes two supporting platforms 51, which are respectively fixedly connected to the top and bottom of two adjacent tower sections 31. The two supporting platforms 51 are fixedly connected via a scissor bracket 52, and the scissor bracket 52 is provided with at least one hydraulic cylinder 53 for unfolding the scissor bracket 52, and the hydraulic cylinder 53 is connected to the hydraulic system. A safety leg 54 is provided at the bottom of the supporting platform 51 at the bottom.

[0043] As a further solution of this embodiment, refer to Figure 5 A slot 312 for engaging with the hydraulic lifting platform is provided at the bottom of each tower section 31. The arrangement of the slot 312 facilitates the fixed connection between the tower section 31 and the hydraulic lifting platform.

[0044] As a further solution of this embodiment, refer to Figure 2 A plurality of accommodating grooves 311 are provided on all sides of the tower section 31 at the top in the vertical direction, and each accommodating groove 311 corresponds to each wind speed measuring assembly 4 one by one, and each wind speed measuring assembly 4 is installed in the corresponding accommodating groove 311. The arrangement of the accommodating grooves 311 provides installation space for the wind speed measuring assembly 4 without affecting the telescopic movement of the tower section 31.

[0045] Specifically, refer to Figure 2 Each wind speed measuring assembly 4 includes a telescopic member 41, a fixed end of the telescopic member 41 is fixed in the accommodating groove 311, an L-shaped electric shaft 42 is provided on the telescopic end of the telescopic member 41, a wind speed sensor 43 is fixed on the free end of the electric shaft 42, and the electric shaft 42 is used to drive the wind speed sensor 43 to rotate to change the measuring position of the wind speed sensor 43.

[0046] The telescopic member 41 accommodates the wind speed sensor 43 in the receiving groove 311 when the tower section 31 is retracted, and can also move the wind speed sensor 43 to the outside when the tower section 31 is extended. The electric rotating shaft 42 is used to rotate the wind speed sensor 43 on the horizontal plane to change the measurement position of the wind speed sensor 43. The controller can obtain the rotation angle of the wind speed sensor 43 with the maximum wind speed in the rotation range to obtain the wind direction.

[0047] As a further solution of this embodiment, the telescopic member 41 can be an electric telescopic rod or a scissor-type telescopic rod. Preferably, the telescopic member 41 of this embodiment includes a plurality of hinged connecting rods, and the hinges of two adjacent connecting rods are provided with a steering gear electrically connected to the controller, and the steering gear is used to change the deployment angle of the two adjacent connecting rods. In this embodiment, multiple steering gears rotate simultaneously, which can not only move the wind speed sensor 43 in the horizontal direction, so that the wind speed sensor 43 can be extended or retracted into the accommodating groove 311; multiple steering gears use different rotation angles, and while moving the wind speed sensor 43 in the horizontal direction, the vertical position of the wind speed sensor 43 can be changed when the tower section 31 does not move, thereby increasing the detection range of a single wind speed sensor 43 in the vertical direction, and facilitating the controller to update the height position of the maximum wind speed in real time through the wind speed sensor 43.

[0048] As a further solution of this embodiment, the electric rotating shaft 42 includes a base fixed in the accommodating groove 311, a rotating shaft arranged on the base, a rotating disk installed on the upper part of the rotating shaft, and a cylinder arranged on the rotating disk. A driving motor is installed in the cylinder, and the driving motor is in transmission connection with the rotating disk installed on the upper part of the rotating shaft. When the driving motor rotates, the cylinder arranged on the rotating disk can be driven to rotate with the rotating disk. The use of the electric rotating shaft 42 increases the horizontal movement range of the wind speed sensor 43, thereby increasing the detection range of the wind speed sensor 43, which is conducive to the controller obtaining the wind direction of the maximum wind speed through the wind speed sensor 43.

[0049] In this embodiment, the wind speed sensor 43 is a three-cup mechanical wind speed sensor 43. The three-cup mechanical wind speed sensor 43 has a simple structure, is easy to manufacture and maintain, works stably and reliably, is not easily affected by environmental changes, and the cooperation of the three-cup mechanical wind speed sensor 43 with the electric rotating shaft 42, the telescopic member 41 and the controller can find the position with the maximum wind speed and the wind direction of the maximum wind speed. Compared with the wind direction and wind speed integrated sensor that can directly measure the maximum wind speed and wind direction, the manufacturing and maintenance costs of the three-cup mechanical wind speed sensor 43 are lower.

[0050] Example 2

[0051] This embodiment is further limited on the basis of the embodiment 1, and the specific improvement lies in how to adjust the height of a wind turbine tower based on an adjustable height. For other parts not mentioned, refer to the embodiment 1 or the prior art.

[0052] This embodiment provides a method for adjusting a wind turbine tower with adjustable height, comprising the following steps:

[0053] S1, multiple wind speed measurement components 4 collect wind condition data at different heights in real time, and obtain the height corresponding to the maximum wind speed and the wind direction of the maximum wind speed in real time;

[0054] S2, moving the wind turbine generator set 1 to the height in step S1, and making the blades 14 of the wind turbine generator set 1 face the wind direction in step S1.

[0055] The above adjustment method can make the wind power tower face the position of maximum wind speed in real time, so as to maximize the utilization of wind energy resources.

[0056] Specifically, the method for obtaining the wind speed and direction in step S1 is: using the telescopic part 41 to move the wind speed sensor 43 outside the accommodating groove 311, and using the automatic rotating shaft to rotate the wind speed sensor 43 on the horizontal plane, obtaining the rotation angle of the wind speed sensor 43 with the maximum wind speed in the rotation range, and using the rotation angle to obtain the wind direction.

[0057] As a further solution of this embodiment, during the operation of the wind power tower, vibration sensors and temperature sensors are used to monitor the vibration data and temperature data of the generator 16 in real time. If both the vibration data and the temperature data exceed the threshold, the controller stops the generator 16 and issues an alarm, and at the same time, the lifting assembly 5 drives the tower assembly 3 to move to the lowest position, otherwise it operates normally. The coordination of the vibration sensor, the temperature sensor and the control can prevent the generator 16 from being damaged due to excessive rotation speed in extreme weather, thereby reducing maintenance costs.

[0058] Although the specific implementation of the invention is described in detail in conjunction with the drawings, it should not be understood as limiting the scope of protection of this patent. Within the scope described in the claims, various modifications and variations that can be made by those skilled in the art without creative work still fall within the scope of protection of this patent.

Claims

1. A wind power tower with adjustable height, characterized in that: The wind turbine tower comprises a main body, the main body comprising a tower assembly (3), the tower assembly (3) comprising at least two slidably connected tower sections (31), a lifting assembly (5) being arranged between the bottoms of two adjacent tower sections (31); the lifting assembly (5) being a scissor-type hydraulic lifting platform, the top and bottom of the hydraulic lifting platform being respectively fixed on the bottoms of two adjacent tower sections (31); At least one lifting assembly (5) is arranged at the bottom of the tower assembly (3), a plurality of wind speed measuring assemblies (4) are arranged on the tower assembly (3) in a vertical direction, and the top of the tower assembly (3) is connected to the wind turbine set (1); The wind turbine generator set (1) comprises a nacelle (11) rotatably connected to a tower assembly (3) via a yaw device (2); a control system and a generator (16) are arranged inside the nacelle (11); the control system comprises a controller, a vibration sensor and a temperature sensor; the vibration sensor and the temperature sensor are arranged on the generator (16); the controller is electrically connected to each lifting assembly (5), each wind speed measurement assembly (4), the generator (16), the vibration sensor and the temperature sensor respectively; A plurality of accommodating grooves (311) are provided on all sides of the tower section (31) located at the top in a vertical direction, each of the accommodating grooves (311) is in a one-to-one correspondence with each of the wind speed measuring components (4), and each wind speed measuring component (4) is installed in a corresponding accommodating groove (311); Each of the wind speed measurement components (4) comprises a telescopic member (41), the fixed end of the telescopic member (41) being fixed in the accommodating groove (311), an L-shaped electric rotating shaft (42) being arranged on the telescopic end of the telescopic member (41), a wind speed sensor (43) being fixed on the free end of the electric rotating shaft (42), the electric rotating shaft (42) being used to drive the wind speed sensor (43) to rotate so as to change the measuring position of the wind speed sensor (43); the telescopic member (41) comprises a plurality of hinged connecting rods, the hinges of two adjacent connecting rods being provided with a steering gear electrically connected to a controller, the steering gear being used to change the deployment angle of the two adjacent connecting rods and to change the vertical position of the wind speed sensor (43) when the tower section (31) is stationary.

2. The height-adjustable wind power tower according to claim 1, characterized in that: A slot (312) for engaging with the hydraulic lifting platform is provided on the bottom of each tower section (31).

3. The height-adjustable wind power tower according to claim 1, characterized in that: The wind speed sensor (43) is a three-cup type mechanical wind speed sensor (43).

4. A method for adjusting a height-adjustable wind power tower according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1. Multiple wind speed measurement components collect wind condition data at different heights in real time, and obtain the height corresponding to the maximum wind speed and the wind direction of the maximum wind speed in real time; S2, moving the wind turbine generator set to the height in step S1, and making the blades of the wind turbine generator set face the wind direction in step S1.

5. The adjustment method according to claim 4, characterized in that: The method for obtaining the wind speed direction in step S1 is: using a telescopic member to move the wind speed sensor outside the accommodating groove, and using an automatic rotating shaft to rotate the wind speed sensor on the horizontal plane, obtaining the rotation angle of the wind speed sensor with the maximum wind speed in the rotation range, and using the rotation angle to obtain the wind direction.

6. The adjustment method according to claim 4, characterized in that: Vibration sensors and temperature sensors are used to monitor the vibration and temperature data of the generator in real time. If both the vibration and temperature data exceed the threshold, the controller stops the generator and sounds an alarm, and at the same time causes the lifting assembly to drive the tower assembly to the lowest position, otherwise it operates normally.

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