A wind power plant and system

Abstract

The application relates to the field of wind power generation, and discloses a wind power generation device and system, which comprises a sensor, a controller and a wind power conversion device; the wind power conversion device comprises a captive wind cylinder, a generator and a support frame; the support frame comprises a support rod with an extension device; the first end of the support rod is connected with the captive wind cylinder; the second end of the support rod is connected with the generator; the controller is connected with the sensor to acquire wind speed information sent by the sensor and determine a target rigidity according to the wind speed information; the controller is connected with the wind power conversion device to acquire rigidity influencing factors of the wind power conversion device and adjust the rigidity influencing factors according to the target rigidity. According to the application, the controller determines the target rigidity of the wind power conversion device according to the wind speed information, and adjusts the rigidity influencing factors of the wind power conversion device according to the target rigidity, so that the rigidity of the wind power conversion device corresponds to the wind speed, and the wind power generation device can normally work under different wind speeds, and the power generation efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wind power generation, in particular to a wind power generation device and system. BACKGROUND

[0002] Wind energy as a clean energy has a very large use prospect in the current era of environmental protection problems. With the development of energy storage technology, wind energy is increasingly valued by people, and fully utilizing wind energy for power generation is a very meaningful measure. Current wind power generation devices are mainly large wind turbine generators, which have large power generation capacity, but have high requirements for the environment, high equipment investment costs and high maintenance costs. Therefore, the technical personnel in the field gradually turn their attention to vortex-induced vibration power generation technology.

[0003] The vortex-induced vibration generator is a kind of bladeless wind turbine that uses the Karman vortex street phenomenon. Compared with the traditional wind turbine, it has the advantages of low manufacturing and maintenance cost, compact structure, and low noise. The vortex-induced vibration generator uses the periodic vortex shedding behind the energy-capturing column when the wind passes through the energy-capturing column to produce vortex-induced vibration, so that the energy-capturing column is subjected to alternating transverse force and vibrates, and then the mechanical energy is converted into electrical energy. However, the power generation capacity of the vortex-induced vibration generator is related to the wind speed, and the range of wind speed that it can adapt to is relatively narrow. When the wind speed changes, the generator may not work normally, affecting the power generation efficiency of the generator set.

[0004] Therefore, how to provide a wind power generation device that can adapt to different wind speeds to improve the power generation efficiency of the power generation device and reduce the power generation cost is a problem that needs to be solved by the technical personnel in the field. SUMMARY

[0005] The purpose of the present application is to provide a wind power generation device and system to adapt the wind power generation device to different wind speeds, thereby providing power generation efficiency and reducing power generation cost.

[0006] In order to solve the above technical problems, the present application provides a wind power generation device, comprising:

[0007] a sensor, a controller, and a wind power conversion device;

[0008] The wind power conversion device comprises an energy-capturing wind cylinder, a generator and a support frame, the support frame comprises a support rod with an extension device, the first end of the support rod is connected with the energy-capturing wind cylinder, and the second end of the support rod is connected with the generator;

[0009] The controller is connected with the sensor to obtain the wind speed information sent by the sensor, and determines the target stiffness according to the wind speed information;

[0010] The controller is connected to the wind power conversion device to obtain a rigidity influencing factor affecting the wind power conversion device and adjust the rigidity influencing factor according to the target rigidity.

[0011] Preferably, the rigidity influencing factor of the wind power conversion device comprises the length of the support rod, the outer diameter of the energy-capturing wind cylinder and the rigidity of the generator.

[0012] Preferably, the support rod comprises a first support rod and a second support rod with telescopic devices.

[0013] The first end of the first support rod is connected to the energy-capturing wind cylinder, and the second end of the first support rod is hingedly connected to the first end of the second support rod.

[0014] The second end of the second support rod is connected to the generator.

[0015] Preferably, the generator is a variable-rigidity generator.

[0016] The permanent magnet rotor of the generator is connected to the base of the generator through a variable-rigidity spring.

[0017] Preferably, the variable-rigidity spring is an air spring.

[0018] Preferably, the controller is further configured to adjust the rigidity of the air spring according to the target rigidity to change the rigidity of the wind power conversion device.

[0019] Preferably, the support frame further comprises a mounting flange, a central support column with telescopic devices and a spherical hinge.

[0020] The spherical hinge is arranged on the ground, and the mounting flange is arranged on the central support column.

[0021] The first end of the central support column is connected to the spherical hinge, and the central support column is further provided with a third support rod and a hydraulic oil cylinder, the first end of the third support rod is connected to the hydraulic oil cylinder, and the second end of the third support rod is connected to the inner wall of the energy-capturing wind cylinder.

[0022] The mounting flange is used to fix the energy-capturing wind cylinder.

[0023] Preferably, the energy-capturing wind cylinder is a cylindrical structure with adjustable inner diameter.

[0024] Preferably, the sensor comprises a wind speed sensor and a vibration sensor.

[0025] To solve the above technical problems, the application also provides a wind power generation system comprising the wind power generation device.

[0026] The application provides a wind power generation device, comprising a sensor, a controller, a wind power conversion device; the wind power conversion device comprises a wind energy trapping cylinder, a generator and a support frame; the support frame comprises a support rod with an extension device; a first end of the support rod is connected with the wind energy trapping cylinder, and a second end of the support rod is connected with the generator; the controller is connected with the sensor to obtain wind speed information sent by the sensor and determine a target rigidity according to the wind speed information; the controller is connected with the wind power conversion device to obtain rigidity influencing factors of the wind power conversion device and adjust each rigidity influencing factor according to the target rigidity, so that the rigidity of the wind power conversion device is changed to adapt to the current wind speed. Therefore, the technical scheme provided by the application can determine the target rigidity of the wind power conversion device according to the wind speed information through the controller, adjust each rigidity influencing factor of the wind power conversion device according to the target rigidity, so that the rigidity of the wind power conversion device corresponds to the wind speed, the wind power generation device can work normally under different wind speeds, and the power generation efficiency of the wind power generation device is improved.

[0027] To solve the above technical problems, the application further provides a wind power generation system comprising the wind power generation device, and the effect is the same as above. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the application, the drawings needed in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0029] Figure 1 A structural diagram of the wind power generation device provided by the embodiments of the application;

[0030] Figure 2 A structural diagram of the wind power conversion device provided by the embodiments of the application;

[0031] Figure 3 A structural diagram of the first support rod and the second support rod provided by the embodiments of the application;

[0032] Figure 4 A structural diagram of the adjustable rigidity generator provided by the embodiments of the application;

[0033] Figure 5 A top view of the wind energy trapping cylinder provided by the embodiments of the application;

[0034] Figure 6 A side view of the wind energy trapping cylinder provided by the embodiments of the application;

[0035] The reference signs are as follows: 1 is a sensor, 2 is a controller, 3 is a wind power conversion device, 4 is a wind energy capturing cylinder, 5 is a generator, 51 is a permanent magnet rotor S pole, 52 is a permanent magnet stator N pole, 53 is an induction coil, 54 is a stator fixing flange, 55 is an air spring, 56 is a motor base, 6 is a first support rod, 61 is a telescopic support rod first arm, 62 is a telescopic support rod second arm, 63 is a sliding block, 64 is a telescopic support rod hydraulic cylinder, 7 is a second support rod, 8 is a mounting flange, 9 is a central support column, 10 is a spherical hinge, and 11 is a third support rod. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0037] The core of the present application is to provide a wind power generation device and system, so that the wind power generation device is adapted to different wind speeds, thereby providing power generation efficiency and reducing power generation cost.

[0038] In order to enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0039] Figure 1 The structural diagram of the wind power generation device provided by the embodiments of the present application is shown in Figure 1 The wind power generation device includes a sensor 1, a controller 2, and a wind power conversion device 3. The wind power conversion device 3 includes a wind energy capturing cylinder 4, a generator 5, and a support frame. The support frame includes a support rod with a telescopic device. The first end of the support rod is connected with the wind energy capturing cylinder 4, and the second end of the support rod is connected with the generator 5. The controller 2 is connected with the sensor 1 to obtain the wind speed information sent by the sensor 1, and to determine the target stiffness according to the wind speed information. The controller 2 is connected with the wind power conversion device 3 to obtain the stiffness influencing factors affecting the wind power conversion device 3, and to adjust each stiffness influencing factor according to the target stiffness.

[0040] It can be understood that the stiffness influencing factors of the wind power conversion device 3 include the structure of the support frame, the stiffness of the generator 5, and the outer diameter of the wind energy capturing cylinder 4.

[0041] In the embodiment, the sensor 1 is used to acquire the wind speed information at the wind power conversion device 3, so that the controller 2 adjusts the structure of the wind power conversion device 3 according to the wind speed information. When the natural wind with a certain wind speed flows through the energy-capturing wind cylinder 4, the vortex is periodically detached, which brings a transverse periodic excitation. When the periodic excitation is consistent with the natural frequency of the structure, resonance phenomenon occurs. The wind speed at which the frequency is equal to the natural frequency of the structure is called the critical wind speed, and the expression is as follows:

[0042]

[0043] wherein v crit is the critical wind speed, d is the outer diameter at the height of the energy-capturing wind cylinder 3 / 4, f i is the i-th order natural frequency of the energy-capturing system structure, in the embodiment, usually only the first order natural frequency is considered, S t is the Strouhal number.

[0044] When the natural frequency of the structure is adjustable, and always satisfies the above expression with the real-time wind speed, the energy-capturing system is always in the critical wind speed area, and the power generation system is in the highest efficiency power generation state.

[0045] In the embodiment, the telescopic device is arranged in the support rod, and the structure of the wind power conversion device 3 is adjusted by controlling the telescopic device to work, so as to change the natural frequency, so as to achieve the purpose of changing the critical wind speed. It can be understood that the support rod can be linear or zigzag, which is not limited here. When the linear support rod is selected, the length and the angle with the ground of the support rod are adjusted, so as to adjust the structure of the support frame and the height of the energy-capturing wind cylinder from the ground; when the zigzag support rod is selected, the support rod parallel to the ground is adjusted to adjust the structure of the support frame, and the support rod perpendicular to the ground is adjusted to adjust the structure of the support frame and the height of the energy-capturing wind cylinder from the ground.

[0046] In the embodiment, when the telescopic device of the support rod is controlled to work, the length of the support rod changes, and the volume of the support frame of the wind power conversion device 3 and / or the height of the energy-capturing wind cylinder 4 also changes, so as to change the critical wind speed of the wind power conversion device 3.

[0047] The embodiment provides a wind power generation device, which comprises a sensor, a controller, a wind power conversion device; the wind power conversion device comprises a captive wind cylinder, a generator and a support frame; the support frame comprises a support rod with a telescopic device; a first end of the support rod is connected with the captive wind cylinder; a second end of the support rod is connected with the generator; the controller is connected with the sensor to acquire wind speed information sent by the sensor and determine a target rigidity according to the wind speed information; the controller is connected with the wind power conversion device to acquire rigidity influencing factors of the wind power conversion device and adjust each rigidity influencing factor according to the target rigidity, so that the rigidity of the wind power conversion device is changed to adapt to the current wind speed. As can be seen, the technical scheme provided by the application determines the target rigidity of the wind power conversion device according to the wind speed information through the controller, adjusts each rigidity influencing factor of the wind power conversion device according to the target rigidity, so that the rigidity of the wind power conversion device corresponds to the wind speed, and the wind power generation device can normally work under different wind speeds, thereby improving the power generation efficiency of the wind power generation device.

[0048] Figure 2 A structural diagram of a wind power conversion device provided by the embodiment of the application, Figure 3 A structural diagram of a first support rod and a second support rod provided by the embodiment of the application, Figure 4 A structural diagram of a rigidity-adjustable generator provided by the embodiment of the application; as Figure 2 Or Figure 3 、 Figure 4 The support rod comprises a first support rod 6 and a second support rod 7 with telescopic devices; a first end of the first support rod 6 is connected with the captive wind cylinder 4; a second end of the first support rod 6 is hingedly connected with a first end of the second support rod 7; a second end of the second support rod 7 is connected with the generator 5. The generator 5 is a rigidity-variable generator; a permanent magnet rotor of the generator 5 is connected with a base of the generator 5 through a variable rigidity spring.

[0049] The adaptive wind-induced vortex-induced vibration power generation device is as shown in Figure 1 , Figure 2 4 is the captive wind cylinder, 8 is the mounting flange, 6 is the first support rod, 7 is the second support rod, the first support rod 6 and the second support rod 7 are both telescopic support rods, 9 is the central support column, and 10 is the spherical hinge. The telescopic support rod is as shown in Figure 3 : 61 is a first-stage arm of the telescopic support rod, 62 is a second-stage arm of the telescopic support rod, 7 is the second support rod, 63 is a sliding block, and 64 is a telescopic support rod hydraulic oil cylinder. The second support rod 7 can have the same structure as the first support rod 6 or can be a simple support foot. The telescopic support rod hydraulic oil cylinder is connected with the controller 2; when it is necessary to adjust the rigidity influencing factors of the wind power conversion device 3, the controller 2 determines target lengths of the first support rod 6 and the second support rod 7 according to the target rigidity and controls the telescopic support rod hydraulic oil cylinder to act to adjust the support rod lengths.

[0050] The longitudinal section of the adjustable stiffness generator 5 is shown in Figure 4 , Figure 3 51 is a permanent magnet mover S-pole, 52 is a permanent magnet stator N-pole, 53 is an induction coil, 54 is a stator fixing flange, 55 is an air spring, and 56 is a motor base. In a specific implementation, the variable stiffness spring can be an oil-gas spring, an air spring, etc. In a specific application scenario, the energy-capturing wind cylinder 4 is fixed to the mounting flange 8, the telescopic support rod first arm is fixed to the mounting flange 8, the permanent magnet mover is fixed to the bottom of the support rod support foot, the bottom of the motor permanent magnet mover is fixed to the air spring, and the bottom of the air spring is fixed to the motor base. As a preferred embodiment, the variable stiffness spring is an air spring. The controller 2 is further configured to adjust the stiffness of the air spring according to the target stiffness to change the stiffness of the wind power conversion device 3. The controller 2 is connected to the air spring, and when the controller 2 needs to adjust the stiffness of the generator 5, the target stiffness of the air spring is first determined according to the target stiffness, and the air charge of the air spring is determined according to the target stiffness of the air spring.

[0051] On the basis of the above embodiment, the stiffness adjustment of the method can be achieved in the following three ways: telescopic support rod, telescopic support rod and air spring inflation and deflation, to adjust the stiffness.

[0052] The stiffness formula of the support rod is as follows:

[0053]

[0054] In the formula, E is the elastic modulus, I is the bending section moment of the support rod, l is the support rod span, and k is the stiffness of the support rod. As can be seen from the above formula, the stiffness of the energy-capturing device can be greatly adjusted by changing the span through telescopic support rod.

[0055] The vertical static stiffness formula of the air spring is as follows:

[0056]

[0057] In the formula, k vs is the stiffness of the air spring, m is the gas variable coefficient, p is the air spring pressure, p0 is the reference atmospheric pressure, S is the effective bearing area of the air spring, V is the volume of the air spring, and a is a constant.

[0058] Figure 5 is a top view of an energy-capturing wind cylinder provided by an embodiment of the present application, Figure 6 is a side view of an energy-capturing wind cylinder provided by an embodiment of the present application, as shown in Figure 5 or Figure 6As shown, the support frame further comprises: a mounting flange 8, a central support column 9 with a telescopic device and a spherical hinge; wherein the spherical hinge is arranged at the ground, the mounting flange 8 is arranged on the central support column 9; the first end of the central support column 9 is connected with the spherical hinge; the mounting flange 8 is used for fixing the energy-capturing wind cylinder 4. The energy-capturing wind cylinder 4 is a cylindrical structure with adjustable inner diameter. The central support column 9 is further provided with a third support rod 11 and a hydraulic oil cylinder; the first end of the third support rod 11 is connected with the hydraulic oil cylinder, and the second end of the third support rod 11 is connected with the inner wall of the energy-capturing wind cylinder 4. The controller 2 can change the length of the third support rod 11 by controlling the action of the hydraulic oil cylinder, so as to change the outer diameter of the energy-capturing wind cylinder 4. Figure 5 The energy-capturing wind cylinder shown is one case of the energy-capturing wind cylinder provided in the present application, which has an overlapping part, and the length of the third support rod 11 can be adjusted by the hydraulic oil cylinder, so as to change the outer diameter of the energy-capturing wind cylinder. In addition to the structure shown, the energy-capturing wind cylinder can also have other structures, such as being composed of a plurality of arc-shaped iron sheets, and each arc-shaped iron sheet overlaps with each other, and the like, which will not be described here. Figure 5 In addition to the structure shown, the energy-capturing wind cylinder can also have other structures, such as being composed of a plurality of arc-shaped iron sheets, and each arc-shaped iron sheet overlaps with each other, and the like, which will not be described here.

[0059] In specific implementation, the sensor 1 comprises: a wind speed sensor and a vibration sensor. The wind speed sensor is arranged at the energy-capturing wind cylinder to obtain wind speed information at the energy-capturing wind cylinder, and the vibration sensor is arranged at the generator to further obtain wind speed information according to the influence of wind speed on the generator. In the wind power generation scene using the energy-capturing wind cylinder, when wind passes through the energy-capturing wind cylinder, periodic vortex shedding is generated behind the energy-capturing wind cylinder, vortex-induced vibration occurs, so that the energy-capturing wind cylinder is vibrated by alternating transverse force, and then the mechanical energy is utilized and converted into electric energy. Therefore, by arranging the vibration sensor at the generator, vibration data of the generator can be collected, and in combination with the data obtained by the wind speed sensor arranged at the energy-capturing wind cylinder, wind speed information can be more accurately obtained.

[0060] In addition, the application further provides a wind power generation system, which comprises the wind power generation device and further comprises power transmission equipment, wind power conversion device maintenance equipment and the like. The wind power generation device comprises a sensor, a controller and a wind power conversion device. The wind power conversion device comprises a captive wind cylinder, a generator and a support frame. The support frame comprises a support rod with an extension device. The first end of the support rod is connected with the captive wind cylinder, and the second end of the support rod is connected with the generator. The controller is connected with the sensor to obtain the wind speed information sent by the sensor and determine the target rigidity according to the wind speed information. The controller is connected with the wind power conversion device to obtain the rigidity influencing factors of the wind power conversion device and adjust each rigidity influencing factor according to the target rigidity, so as to change the rigidity of the wind power conversion device to adapt to the current wind speed. It can be seen that the technical scheme provided by the application determines the target rigidity of the wind power conversion device according to the wind speed information through the controller, adjusts each rigidity influencing factor of the wind power conversion device according to the target rigidity, so that the rigidity of the wind power conversion device corresponds to the wind speed, and the wind power generation device can work normally under different wind speeds, thereby improving the power generation efficiency of the wind power generation device.

[0061] The wind power generation device and system provided by the application are described in detail above. Each embodiment in the specification is described in a progressive manner, and each embodiment mainly describes the difference from other embodiments. The same or similar parts of each embodiment can be referred to each other. For the device disclosed by the embodiment, since it corresponds to the method disclosed by the embodiment, the description is relatively simple, and the related parts can be referred to the method part. It should be pointed out that for ordinary skilled in the art, without departing from the principle of the application, some improvements and modifications can be made to the application, and these improvements and modifications also fall within the protection scope of the claims of the application.

[0062] It should be further noted that in the specification, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitation, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or equipment including the element.

Claims

1. A wind power plant, characterized in that The wind power generation device comprises a sensor (1), a controller (2), and a wind power conversion device (3). The wind power conversion device (3) comprises a wind energy capturing cylinder (4), a generator (5), and a support frame, wherein the support frame comprises a support rod with a telescopic device, the first end of the support rod is connected with the wind energy capturing cylinder (4), and the second end of the support rod is connected with the generator (5). The controller (2) is connected with the sensor (1) to obtain the wind speed information sent by the sensor (1) and determine the target stiffness according to the wind speed information. The controller (2) is connected with the wind power conversion device (3) to obtain the stiffness influencing factors of the wind power conversion device (3) and adjust the stiffness influencing factors according to the target stiffness. The stiffness influencing factors of the wind power conversion device (3) include the length of the support rod, the outer diameter of the wind energy capturing cylinder (4), and the stiffness of the generator (5). The support frame further comprises a central support column (9) with a telescopic device. The central support column (9) is further provided with a third support rod (11) and a hydraulic oil cylinder, the first end of the third support rod (11) is connected with the hydraulic oil cylinder, and the second end of the third support rod (11) is connected with the inner wall of the wind energy capturing cylinder (4); wherein the controller (2) changes the length of the third support rod (11) by controlling the hydraulic oil cylinder to adjust the outer diameter of the wind energy capturing cylinder (4). The support rod comprises a first support rod (6) and a second support rod (7) with telescopic devices. Wherein, based on the expression The outer diameter of the wind catcher (4) and the structure of the energy capturing system are regulated to make the energy capturing system in the critical wind speed area. The natural frequency of the second order is regulated to make the energy capturing system in the critical wind speed area. wherein, Vcr is the critical wind speed, D is the outer diameter at 3 / 4 height of the wind turbine 3, f is the natural frequency of the structure of the energy capturing system, f is the natural frequency of the structure of the energy capturing system, Str is the Strouhal number; the critical wind speed is the wind speed at which the vortex shedding period is equal to the natural frequency of the structure.

2. The wind power plant according to claim 1, characterized in that The first end of the first support rod (6) is connected with the wind energy capturing cylinder (4), and the second end of the first support rod (6) is hingedly connected with the first end of the second support rod (7). The second end of the second support rod (7) is connected with the generator (5). The generator (5) is a stiffness variable generator.

3. The wind power plant according to claim 1, characterized in that The permanent magnet rotor of the generator (5) is connected with the base of the generator (5) through a variable stiffness spring. The variable stiffness spring is an air spring.

4. The wind power plant according to claim 3, characterized in that The controller (2) is further used to adjust the stiffness of the air spring according to the target stiffness to change the stiffness of the wind power conversion device (3).

5. The wind power plant according to claim 4, characterized in that The support frame further comprises a mounting flange (8) and a spherical hinge (10).

6. The wind power plant according to any of claims 1 to 5, characterized in that The spherical hinge (10) is arranged on the ground, and the mounting flange (8) is arranged on the central support column (9). The mounting flange (8) is used to fix the wind energy capturing cylinder (4). The wind energy capturing cylinder (4) is a cylindrical structure with adjustable inner diameter.

7. The wind power plant according to claim 6, characterized in that The sensor (1) comprises a wind speed sensor and a vibration sensor.

8. The wind power plant according to claim 1, characterized in that The wind power generation device according to any one of claims 1 to 8.

9. A wind power system characterized by The wind power generation device according to any one of claims 1 to 8.

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