Fan lightning protection grounding resistance regulator

Abstract

The utility model relates to the technical field of resistance regulator, specifically relates to fan lightning protection grounding resistance regulator, the inner column department is located in the bottom of outer tube department, and can slide along the up and down of outer tube department, the inner column department includes several convex cone parts, the convex cone part is used for increasing the contact area of inner column department and soil, when the inner column department slides downward along the outer tube department, the area of outer tube department and inner column department contact soil is greater, and the contact resistance with soil is smaller, when the inner column department slides upward along the outer tube department, the area of outer tube department and inner column department contact soil is smaller, and the contact resistance with soil is greater, through setting the inner column department of sliding in the outer cylinder, the size of grounding resistance is changed, when the inner column department slides into the outer cylinder, the surface area of grounding resistance is smaller, and the contact resistance with soil is greater, when the inner column department slides out of the outer cylinder, the surface area of grounding resistance is greater, and the contact resistance with soil is smaller, the convex cone body and convex cone block increase the surface area of inner column department, and expand the adjustment range of grounding resistance.

Description

Technical Field

[0001] This utility model relates to the field of resistance regulator technology, and in particular to a wind turbine lightning protection grounding resistance regulator. Background Technology

[0002] A wind turbine (wind power generator set) is a device that converts wind energy into electrical energy. Due to their prominent height, wind turbines are susceptible to lightning strikes. A wind turbine lightning protection grounding resistance regulator is used in the lightning protection grounding system of a wind power generator set to dynamically adjust or optimize the grounding resistance, ensuring that the grounding system always meets lightning protection requirements.

[0003] Chinese Patent Application No. CN202120732407.9 discloses a wind turbine lightning protection grounding structure. This structure includes a lightning protection wire, a first support rod, a second support rod, and a rotating connection mechanism. The first support rod is fixed to the blade root, and the second support rod is fixed inside the hub. The rotating connection mechanism connects the first and second support rods. The lightning protection wire runs along the first support rod, the rotating connection mechanism, and the second support rod. The rotating connection mechanism is a hollow structure. The lightning protection wire is first tied to the first support rod, then passes through the rotating connection mechanism, and finally ties to the second support rod. Because the lightning protection wire between the first and second support rods is confined within the rotating connection mechanism, the hollow structure prevents the lightning protection wire from deforming as the blades rotate, eliminating the risk of deformation and breakage.

[0004] However, this lightning protection grounding structure cannot adjust the grounding resistance, and cannot adjust the resistance to a suitable value according to the conductivity of the soil at different times, so as to safely conduct the lightning current to the ground. Utility Model Content

[0005] The main purpose of this utility model is to provide a grounding resistance regulator for wind turbine lightning protection, so as to solve the problem in related technologies that the grounding resistance cannot be adjusted and the resistance cannot be adjusted to a suitable value according to the conductivity of the soil at different times, so as to safely guide the lightning current to the ground.

[0006] To achieve the above objectives, according to one aspect of the present invention, a wind turbine lightning protection grounding resistance adjuster is provided, comprising an outer cylinder and an electric cylinder disposed within the outer cylinder, and further comprising an inner column, wherein the inner column is disposed within the bottom of the outer cylinder and can slide up and down along the outer cylinder, the inner column comprising a plurality of convex cones, the convex cones being used to increase the contact area between the inner column and the soil; when the inner column slides downward along the outer cylinder, the larger the contact area between the outer cylinder and the inner column and the soil, the smaller the contact resistance with the soil; when the inner column slides upward along the outer cylinder, the smaller the contact area between the outer cylinder and the inner column and the soil, the larger the contact resistance with the soil.

[0007] Furthermore, the outer cylinder portion includes an outer cylinder body, an outer cylinder cavity, and several slide rails. The bottom of the outer cylinder body is open, the outer cylinder cavity is located inside the outer cylinder body, and the slide rails are all vertically arranged on the inner surface of the outer cylinder body.

[0008] Furthermore, the electric cylinder is located inside the outer cylinder cavity and is fixedly connected to the inner surface of the top of the outer cylinder.

[0009] Furthermore, the inner column portion also includes an inner column body, the top of which is fixedly connected to the electric cylinder.

[0010] Furthermore, the outer ring of the inner cylinder is provided with a plurality of slide bars fixed vertically, and the slide bars are slidably connected to the slide rail.

[0011] Furthermore, the convex cone portion includes a convex cone body and several convex cone blocks.

[0012] Furthermore, each of the convex cones is fixedly connected to the inner cylinder. The convex cones are conical with their tips pointing downwards, and the angle between the convex cones and the inner cylinders is 10° to 15°.

[0013] Furthermore, each of the convex cone blocks is fixedly disposed on the outer surface of the convex cone body. The convex cone block is conical with the cone tip pointing downwards, and the angle between the convex cone block and the convex cone body is 12° to 18°.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This invention changes the grounding resistance by setting a sliding inner column inside the outer cylinder. When the inner column slides into the outer cylinder, the smaller the grounding resistance surface area, the greater the contact resistance with the soil. When the inner column slides out of the outer cylinder, the larger the grounding resistance surface area, the smaller the contact resistance with the soil. The convex cone and convex cone block increase the surface area of ​​the inner column, expanding the adjustment range of the grounding resistance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall design of this utility model;

[0017] Figure 2 This is a cross-sectional view of the present invention;

[0018] Figure 3 This is a schematic diagram of the inner column structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the convex cone structure of this utility model;

[0020] Figure 5 This is the circuit diagram for the lightning protection grounding of the wind turbine of this utility model.

[0021] Illustration:

[0022] 1. Outer cylinder part; 11. Outer cylinder body; 12. Outer cylinder cavity; 13. Slide rail;

[0023] 2. Inner column; 21. Inner column; 22. Sliding bar; 23. Convex cone; 24. Convex cone; 25. Convex cone block;

[0024] 3. Electric cylinder. Detailed Implementation

[0025] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0026] Please see Figures 1 to 5 This embodiment provides a wind turbine lightning protection grounding resistance adjuster, including an outer cylinder 1 and an electric cylinder 3 disposed inside the outer cylinder 1, and also includes an inner column 2, which is disposed inside the bottom of the outer cylinder 1 and can slide up and down along the outer cylinder 1. The inner column 2 includes several convex cones 23, which are used to increase the contact area between the inner column 2 and the soil. When the inner column 2 slides downward along the outer cylinder 1, the larger the contact area between the outer cylinder 1 and the inner column 2 and the soil, the smaller the contact resistance with the soil. When the inner column 2 slides upward along the outer cylinder 1, the smaller the contact area between the outer cylinder 1 and the inner column 2 and the soil, the larger the contact resistance with the soil.

[0027] The outer cylinder 1 includes an outer cylinder body 11, an outer cylinder cavity 12, and several slide rails 13. The bottom of the outer cylinder body 11 is open, the outer cylinder cavity 12 is located inside the outer cylinder body 11, and the slide rails 13 are all vertically arranged on the inner surface of the outer cylinder body 11.

[0028] The electric cylinder 3 is located inside the outer cylinder cavity 12 and is fixedly connected to the inner surface of the top of the outer cylinder 11. It is used to push the inner column 2 to extend or retract into the outer cylinder cavity 12.

[0029] The inner column 2 also includes an inner column 21, the top of which is fixedly connected to the electric cylinder 3. The inner column 21 increases the contact area between the outer cylinder 11 and the soil, and the piston rod end of the electric cylinder 3 is fixed to the top of the inner column 21.

[0030] The outer ring of the inner column 21 is fixed with several slide bars 22 along the vertical direction, and the slide bars 22 are slidably connected to the slide rail 13.

[0031] The cone portion 23 includes a cone body 24 and several cone blocks 25.

[0032] The convex cones 24 are all fixedly connected to the inner column 21. The convex cones 24 are conical with the cone tip pointing downwards, which reduces the resistance to the soil and makes it easier to insert into the soil. The convex cones 24 increase the contact area between the inner column 21 and the soil. The angle between the convex cones 24 and the inner column 21 is 10° to 15°, and in this embodiment, 12° is preferred to facilitate its insertion into the soil.

[0033] The convex cone blocks 25 are all fixedly disposed on the outer surface of the convex cone 24. The convex cone blocks 25 are conical with the cone tip pointing downwards, which reduces the resistance with the soil and makes it easier to insert into the soil. The convex cone blocks 25 increase the contact area between the convex cone 24 and the soil. The angle between the convex cone blocks 25 and the convex cone 24 is 12° to 18°. In this embodiment, 15° is preferred to facilitate its insertion into the soil.

[0034] The outer cylinder 11, inner column 21, convex cone 24 and convex cone block 25 are all made of copper, which has low resistivity and low price.

[0035] The slider 22 slides within the slide rail 13, connecting the outer cylinder 11 and the inner column 21 to form a passage for current to pass through.

[0036] The bottom of the wind turbine houses a low-voltage switchgear, control unit, and communication unit. The resistor regulator is connected to the wind turbine body through the low-voltage switchgear, control unit, and communication unit and is buried in the ground to safely conduct the lightning strike current received by the wind turbine body to the earth.

[0037] When encountering rainy weather, the soil moisture content increases, and the soil resistivity decreases. A shorter resistance regulator can reduce the grounding resistance to ensure effective current discharge. Operating the electric cylinder 3 retracts its piston rod, pulling the inner column 2 into the outer cylinder cavity 12, thus shortening the length of the resistance regulator. Conversely, when encountering dry weather, the soil moisture content decreases, and the soil resistivity increases. A longer resistance regulator is needed to reduce the grounding resistance and ensure effective current discharge. Operating the electric cylinder 3 extends its piston rod, pushing the inner column 2 out of the outer cylinder cavity 12 and into the soil. Both the convex cone 24 and the convex cone block 25 are inserted into the soil, increasing the contact area between the inner column 21 and the soil, thereby increasing the conductivity between the resistance regulator and the soil, safely guiding the lightning current received by the wind turbine to the ground.

[0038] The lightning arrester, located at the very top of the wind turbine, is the first component to receive lightning strikes. Utilizing its elevated position above the turbine, it attracts the lightning to itself, directing the current through a down conductor to a resistor regulator. The regulator then guides the current to the ground, preventing direct lightning strikes to other critical parts of the turbine. The surge arrester, installed at the junction of LPZ0B and LPZ1 / LPZ0B, exhibits high impedance under normal voltage, exhibiting almost no conductivity. When a lightning overvoltage strikes, the arrester quickly becomes low impedance, guiding the overvoltage to ground, limiting the overvoltage amplitude on the equipment, and protecting internal components such as the engine and gearbox from excessive overvoltage impact. The resistor regulator is a key parameter in the grounding system. The 400 / 690V power cable and the grounding resistor form a grounding loop, safely guiding the lightning current to the ground. Lower grounding resistance results in faster and more uniform lightning current dissipation, lower equipment potential rise, and greater safety for equipment and personnel. The wind turbine lightning protection grounding resistance regulator adjusts the grounding resistance value to ensure stable grounding system performance.

[0039] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A wind turbine lightning protection grounding resistance regulator, comprising an outer cylinder (1) and an electric cylinder (3) disposed within the outer cylinder (1), characterized in that, Also includes: The inner column (2) is located inside the bottom of the outer cylinder (1) and can slide up and down along the outer cylinder (1). The inner column (2) includes several convex cones (23). The convex cones (23) are used to increase the contact area between the inner column (2) and the soil. When the inner column (2) slides down along the outer cylinder (1), the larger the contact area between the outer cylinder (1) and the inner column (2) and the soil, the smaller the contact resistance with the soil. When the inner column (2) slides up along the outer cylinder (1), the smaller the contact area between the outer cylinder (1) and the inner column (2) and the soil, the larger the contact resistance with the soil.

2. The wind turbine lightning protection grounding resistance regulator according to claim 1, characterized in that, The outer cylinder (1) includes an outer cylinder body (11), an outer cylinder cavity (12) and several slide rails (13). The bottom of the outer cylinder body (11) is open. The outer cylinder cavity (12) is located inside the outer cylinder body (11). The slide rails (13) are all vertically arranged on the inner surface of the outer cylinder body (11).

3. The wind turbine lightning protection grounding resistance regulator according to claim 2, characterized in that, The electric cylinder (3) is located inside the outer cylinder cavity (12) and is fixedly connected to the inner surface of the top of the outer cylinder (11).

4. The wind turbine lightning protection grounding resistance regulator according to claim 3, characterized in that, The inner column (2) also includes an inner column (21), the top of which is fixedly connected to the electric cylinder (3).

5. The wind turbine lightning protection grounding resistance regulator according to claim 4, characterized in that, The outer ring of the inner column (21) is fixed with several slide bars (22) along the vertical direction, and the slide bars (22) are slidably connected to the slide rail (13).

6. The wind turbine lightning protection grounding resistance regulator according to claim 4, characterized in that, The convex cone portion (23) includes a convex cone body (24) and a plurality of convex cone blocks (25).

7. The wind turbine lightning protection grounding resistance regulator according to claim 6, characterized in that, The convex cones (24) are all fixedly connected to the inner cylinders (21). The convex cones (24) are conical with the cone tip pointing downwards. The angle between the convex cones (24) and the inner cylinders (21) is 10° to 15°.

8. The wind turbine lightning protection grounding resistance regulator according to claim 6, characterized in that, The convex cone blocks (25) are all fixed on the outer surface of the convex cone body (24). The convex cone blocks (25) are cone-shaped with the cone tip pointing downwards. The angle between the convex cone blocks (25) and the convex cone body (24) is 12° to 18°.

Images