A grounding device for a wind farm booster station

Abstract

This utility model relates to the technical field of lightning protection equipment for wind farms, and discloses a grounding device for a wind farm booster station, including a lightning protection component. The lightning protection component is installed at the top of a support rod, which has an internal hollow structure. A connecting support is detachably installed at the bottom of the support rod, and the connecting support is installed on a concrete base. A line assembly connected to the grounding grid is installed on the concrete base, and the line assembly is located inside the connecting support. The down conductor of the lightning protection component passes through the inside of the support rod and connects to the line assembly inside the connecting support. This utility model can provide a unified connection point for the down conductor of the lightning protection component to connect to the line assembly of the grounding grid, improving the convenience of inspection and maintenance and reducing safety hazards.

Description

Technical Field

[0001] This utility model relates to the technical field of lightning protection equipment for wind farms, and in particular to a grounding device for a wind farm booster station. Background Technology

[0002] In the power system of a wind farm, the substation serves as a crucial node for energy collection and conversion, and its safe and stable operation directly affects the power generation efficiency and operational safety of the entire wind farm. The grounding device, as a core component of the substation's lightning protection grounding system, plays a vital role in rapidly introducing lightning current into the earth and preventing equipment damage from lightning strikes. It is a fundamental facility ensuring the insulation safety of the substation's electrical equipment and the operational safety of personnel.

[0003] Currently, in the grounding systems used in wind farm substations, lightning protection components (such as lightning rods and lightning wires) are generally electrically connected to the grounding grid through down conductors to form a complete lightning protection circuit. However, existing grounding systems have significant shortcomings in their structural design: the line components (such as connecting wires and terminals) connecting the down conductors of the lightning protection components to the grounding grid do not have a unified connection point; their connection positions are relatively scattered and not fixed.

[0004] This lack of standardized connection points creates significant inconvenience for subsequent inspection and maintenance. During routine inspections or fault repairs, maintenance personnel find it difficult to quickly and accurately locate the connection points between the down conductors and line components. Due to the inconsistent connection points, different grounding devices or different components of the same device may have different connection methods and locations. Maintenance personnel need to spend a considerable amount of time checking all possible connection points, which undoubtedly increases the workload and difficulty of maintenance.

[0005] Moreover, because the connection points are scattered and not fixed, it is easy to miss or misdiagnose during maintenance. For example, when a grounding device has a grounding problem, maintenance personnel may not be able to find the key connection points and thus cannot find the cause of the fault in time, delaying the fault handling time and affecting the normal operation of the grounding device. At the same time, this situation will also significantly reduce the efficiency of maintenance work and increase the operating costs of the wind farm. In addition, because there are no unified connection points between the down conductor and the line components, these connection points may loosen or oxidize due to uneven stress and environmental erosion during long-term operation. Since the connection points are not clear, these problems are difficult to detect and deal with in a timely manner, thus affecting the reliability of lightning protection grounding and potentially causing safety hazards such as increased grounding resistance and poor lightning current discharge.

[0006] Therefore, there is an urgent need for a wind farm substation grounding device that optimizes the structure of the grounding device and provides a unified connection point for the line components that connect the down conductor of the lightning protection component to the grounding grid, thereby improving the convenience and accuracy of inspection and maintenance. Utility Model Content

[0007] The purpose of this invention is to provide a grounding device for a wind farm booster station, which can provide a unified connection point for the line components that connect the down conductor of the lightning protection component to the grounding grid, thereby improving the convenience of inspection and maintenance and reducing safety hazards.

[0008] The present invention adopts the following technical solution:

[0009] A grounding device for a wind farm substation includes a lightning arrester assembly. The lightning arrester assembly is mounted on the top of a support rod, which has an internally hollow structure. A connecting bracket is detachably mounted on the bottom of the support rod, and the connecting bracket is mounted on a concrete base. A line assembly connected to a grounding grid is mounted on the concrete base, and the line assembly is located inside the connecting bracket. The down conductor of the lightning arrester assembly passes through the inside of the support rod and connects to the line assembly inside the connecting bracket.

[0010] Preferably, the connecting support is detachably connected to the concrete base.

[0011] Preferably, flanges are provided at both ends of the connecting support and at the bottom of the support rod, and the connecting support is fixedly connected to the concrete base and the supporting rod by bolts.

[0012] Preferably, the grate frame is composed of several separate fan-shaped supports.

[0013] Preferably, the connecting support is frustum-shaped.

[0014] Preferably, the connecting support is provided with an openable and closable inspection port.

[0015] Preferably, the connecting support includes a plurality of reinforcing rods spaced apart along the circumferential direction, and a sealing plate is detachably provided between two adjacent reinforcing rods.

[0016] Preferably, the bolt includes a screw rod, on which a nut is provided. The bottom end of the nut has a screw hole that matches the screw rod. Above the screw hole, a limiting hole with a diameter larger than that of the screw rod is formed. A locking sleeve is threaded onto the screw rod above the limiting hole.

[0017] Preferably, the locking sleeve includes a threaded ring that is threadedly connected to the screw, and a plurality of clamping pieces are spaced apart around the circumference of the threaded ring, the plurality of clamping pieces forming a frustum-shaped structure with a small bottom and a large top.

[0018] Preferably, the limiting hole is a frustum-shaped structure with a small opening at the bottom and a large opening at the top.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting a connecting support and placing the line assembly connected to the grounding grid inside the connecting support, and allowing the down conductor of the lightning arrester to pass through the hollow support rod inside and connect to the line assembly inside the connecting support, the connection position of the down conductor and the line assembly is limited to this specific space of the connecting support. This provides a unified and fixed connection point for the down conductor of the lightning arrester to the line assembly connected to the grounding grid, effectively solving the problem of scattered and unstable connection positions in the prior art, and making the line connection structure of the entire grounding device more regular and orderly.

[0020] Because the connection points are all concentrated within the connection supports, maintenance personnel can focus their attention directly on the connection supports during routine inspections or fault repairs, eliminating the need to spend a significant amount of time searching for scattered connection points. This allows for quick and accurate location of the connection between the down conductor and the line components, significantly reducing the workload and difficulty of maintenance. Simultaneously, this centralized connection design reduces the occurrence of missed or false inspections, facilitating timely identification of faults such as poor grounding by maintenance personnel. This shortens fault handling time, ensures the normal operation of the grounding device, and ultimately improves the efficiency of maintenance work, reducing the operating costs of the wind farm.

[0021] Furthermore, the support rod and connecting bracket are detachable, allowing for convenient disassembly and installation when maintenance or replacement of the support rod, lightning protection components, or internal wiring components is required, thus improving the flexibility and convenience of device maintenance. Simultaneously, the connecting bracket is mounted on a concrete base, ensuring the overall stability of the device and providing a solid foundation for its long-term reliable operation. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of an embodiment of this application;

[0023] Figure 2 This is a schematic diagram of the structure of the connecting support without a sealing plate in an embodiment of this application;

[0024] Figure 3 for Figure 1 A magnified view of A in the middle. Detailed Implementation

[0025] The present invention will now be described clearly and completely with reference to the accompanying drawings and embodiments:

[0026] like Figures 1 to 3 As shown, the grounding device for a wind farm booster station according to this utility model includes a lightning protection component 1, which is installed on the top of a support rod 2. The support rod 2 is made of non-metallic insulating material and has a hollow internal structure. A connecting support 3 is detachably installed at the bottom of the support rod 2, and the connecting support 3 is installed on a concrete base 4. A line assembly connected to the grounding grid is installed on the concrete base 4. The grounding grid is the core of the grounding device and needs to be connected to the down conductor to diffuse the lightning current into the soil. The grounding grid specifically includes grounding electrodes and grounding main / branch lines. Since the grounding grid is existing technology, its specific layout and working principle are well known to those skilled in the art and will not be described in detail here. The line assembly is located inside the connecting support 3. The down conductor on the lightning protection component 1 passes through the inside of the support rod 2 and is connected to the line assembly inside the connecting support 3. This invention, by setting a connecting support 3 and placing the wiring assembly connected to the grounding grid inside the connecting support 3, allows the down conductor of the lightning arrester assembly 1 to pass through the hollow support rod 2 and connect to the wiring assembly inside the connecting support 3. This confines the connection position of the down conductor and the wiring assembly to this specific space of the connecting support 3. This provides a unified and fixed connection point for the down conductor of the lightning arrester assembly 1 to the wiring assembly connected to the grounding grid, effectively solving the problem of scattered and unstable connection positions in existing technologies, making the wiring connection structure of the entire grounding device more regular and orderly. It also significantly improves the convenience and accuracy of inspection and maintenance, and enhances the reliability and safety of the wiring connection.

[0027] Furthermore, the connecting support 3 is frustum-shaped. The frustum-shaped connecting support 3 has a larger contact area with the concrete base 4, which can more evenly transfer the load borne by the support rod 2 and the top lightning protection component 1 to the concrete base 4. This provides an extremely stable support foundation for the support rod 2, effectively enhancing the overturning resistance of the entire grounding device when facing external environmental factors such as strong winds and earthquakes, and further ensuring the overall structural stability of the device.

[0028] In this embodiment, the connecting support 3 and the concrete base 4 are detachably connected for easy replacement. Preferably, flanges 5 are provided at both ends of the connecting support 3 and the bottom of the support rod 2. The connecting support 3 and the concrete base 4, as well as the connecting support 3 and the support rod 2, are fixedly connected by bolts. The bolts 6 on the concrete base 4 are integrally cast with it, which ensures the stability of the connecting support 3 installation and thus improves the stability of the support rod 2.

[0029] In this embodiment, the bolt includes a screw rod 6, on which a nut 7 is mounted. The bottom end of the nut 7 has a threaded hole matching the screw rod 6. Above the threaded hole, a limiting hole 8 with a diameter larger than the screw rod 6 is coaxially mounted. A locking sleeve 9 is threaded onto the screw rod 6 above the limiting hole 8. The locking sleeve 9 includes a threaded ring 9-1 connected to the screw rod 6. Multiple clamping pieces 9-2 are spaced apart around the circumference of the threaded ring 9-1, forming a frustum-shaped structure with a smaller bottom and a larger top. The limiting hole 8 is also a frustum-shaped structure with a smaller bottom opening and a larger top opening. When tightening the locking sleeve 9, the nut 7 is installed first, followed by the locking sleeve 9. The threaded ring 9-1 on the locking sleeve 9 moves along the axis of the screw rod 6, causing the clamping pieces 9-2 to gradually enter the limiting hole 8. Because the limiting hole 8 and the clamping plate 9-2 have a beveled fit, the limiting hole 8 exerts an inward squeezing force on the clamping plate 9-2, causing multiple clamping plates 9-2 to tightly hug the screw 6, forming a secondary locking. This double locking structure can effectively counteract the effects of external vibrations and further improve the stability of the connection.

[0030] Furthermore, the connecting support 3 is also equipped with an openable and closable inspection port, facilitating the inspection and maintenance of its internal wiring components without disassembling the support rod 2, thus improving operational convenience. Specifically, the connecting support 3 includes multiple reinforcing rods 3-1 spaced apart along the circumference. Each reinforcing rod 3-1 has a fixing plate 3-2 extending from both sides, with fixing holes 3-3 on it. A sealing plate 3-4 is detachably installed between the two fixing plates 3-2 on two adjacent reinforcing rods 3-1 via bolts. The removal of the sealing plate 3-4 forms an inspection port. The multiple sealing plates 3-4 allow construction personnel to work at different locations as needed, improving operational convenience. The reinforcing rods 3-1 are preferably fixedly connected to the upper and lower flanges 5 by welding, ensuring the structural strength of the entire connecting support 3 and enhancing its stability.

Claims

1. A grounding device for a wind farm substation, comprising a lightning protection assembly, wherein the lightning protection assembly is disposed at the top of a support rod, characterized in that: The support rod has an internal hollow structure, and a connecting bracket is detachably provided at the bottom of the support rod. The connecting bracket is set on a concrete base. A line assembly connected to the grounding grid is provided on the concrete base, and the line assembly is located inside the connecting bracket. The down conductor of the lightning protection assembly passes through the inside of the support rod and is connected to the line assembly inside the connecting bracket.

2. The grounding device for a wind farm substation according to claim 1, characterized in that: The connecting support is detachably connected to the concrete base.

3. The grounding device for a wind farm substation according to claim 2, characterized in that: Flanges are provided at both ends of the connecting support and at the bottom of the support rod. The connecting support is fixedly connected to the concrete base and to the support rod by bolts.

4. The grounding device for a wind farm substation according to claim 3, characterized in that: The bolt on the concrete base is integrally cast with it.

5. The grounding device for a wind farm substation according to any one of claims 1-4, characterized in that: The connecting support is frustum-shaped.

6. The grounding device for a wind farm substation according to claim 5, characterized in that: The connecting support is provided with an openable and closable maintenance port.

7. The grounding device for a wind farm substation according to claim 6, characterized in that: The connecting support includes a plurality of reinforcing rods spaced apart along the circumference, and a sealing plate is detachably provided between two adjacent reinforcing rods.

8. The grounding device for a wind farm substation according to any one of claims 3-4, characterized in that: The bolt includes a screw rod, on which a nut is provided. The bottom end of the nut has a screw hole that matches the screw rod. Above the screw hole, a limiting hole with a diameter larger than that of the screw rod is formed. A locking sleeve is threaded onto the screw rod above the limiting hole.

9. The grounding device for a wind farm substation according to claim 8, characterized in that: The locking sleeve includes a threaded ring that is threaded to the screw. Multiple clamping pieces are spaced apart around the threaded ring, and the multiple clamping pieces enclose a frustum-shaped structure with a smaller bottom and a larger top.

10. The grounding device for a wind farm substation according to claim 9, characterized in that: The limiting hole is a frustum-shaped structure with a small opening at the bottom and a large opening at the top.

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