Lightning arrester state monitoring device

Abstract

The utility model relates to a lightning arrester state monitoring device, which comprises a leakage current monitoring module and a grounding resistance monitoring module sleeved on a grounding copper bar of a lightning arrester, and is characterized in that the leakage current monitoring module comprises a first shell and a first mainboard arranged on the first shell; and the grounding resistance monitoring module is electrically connected with the first mainboard, so that a leakage current value detected by the leakage current monitoring module and a grounding resistance value detected by the grounding resistance monitoring module are sent to the first mainboard. The lightning arrester state monitoring device provided by the utility model solves the problem that the existing lightning arrester monitoring equipment cannot monitor the grounding resistance of the lightning arrester, so that the electrical equipment has the risk of damage.

Description

Technical Field

[0001] This utility model relates to the technical field of surge arrester monitoring equipment, and in particular to a surge arrester status monitoring device. Background Technology

[0002] Surge arresters are one of the important protective devices for ensuring the safe operation of power systems. Their main function is to limit lightning overvoltages transmitted through lines or internal overvoltages caused by operation. After prolonged use, surge arresters may experience problems such as moisture absorption, aging, and partial discharge. Therefore, it is necessary to monitor various parameters of the surge arresters to detect potential problems in a timely manner.

[0003] Existing surge arrester condition monitoring equipment can only monitor the leakage current during the operation of the surge arrester, but cannot monitor the grounding resistance of the surge arrester. When the grounding resistance of the surge arrester is too high, the surge arrester will not be able to conduct the overvoltage to the ground in time, which will lead to the risk of damage to the power equipment. Utility Model Content

[0004] The main purpose of this invention is to propose a surge arrester status monitoring device, which aims to solve the problem that existing surge arrester monitoring equipment cannot monitor the grounding resistance of the surge arrester, thus posing a risk of damage to power equipment.

[0005] To achieve the above objectives, this utility model proposes a surge arrester status monitoring device, including a leakage current monitoring module and a grounding resistance monitoring module sleeved on the grounding copper busbar of the surge arrester. The leakage current monitoring module includes a first housing and a first main board disposed on the first housing. The grounding resistance monitoring module is electrically connected to the first main board so that the leakage current value detected by the leakage current monitoring module and the grounding resistance value detected by the grounding resistance monitoring module are sent to the first main board.

[0006] According to some embodiments of the present invention, the grounding resistance monitoring module includes a second housing, a second main board, and a voltage and current sensor. The second main board and the voltage and current sensor are both disposed inside the second housing. The voltage and current sensor is electrically connected to the second main board, and the second main board is electrically connected to the first main board. The voltage and current sensor has a detection port through which the grounding copper busbar of the surge arrester passes.

[0007] According to some embodiments of the present invention, the voltage and current sensor includes a first sensor component and a second sensor component, wherein the first sensor component and the second sensor component are arranged in a semi-circular manner and are spliced ​​together to form a ring-shaped voltage and current sensor.

[0008] According to some embodiments of the present invention, the second housing includes two half-housings, and the first sensor component and the second sensor component are respectively disposed in the two half-housings.

[0009] According to some embodiments of the present invention, the inner wall of the semi-shell is provided with reinforcing ribs, and the outer wall of each sensor component is provided with mounting grooves at corresponding positions for the reinforcing ribs to extend into and be fixed.

[0010] According to some embodiments of the present invention, a plurality of reinforcing ribs are provided, and the plurality of reinforcing ribs are spaced apart in the thickness direction of the semi-shell, and each of the sensor components has a corresponding number of mounting slots at corresponding positions.

[0011] According to some embodiments of the present invention, conductive bumps are provided at both ends of the first sensor component and the second sensor component.

[0012] According to some embodiments of the present invention, the grounding resistance monitoring module further includes a mounting bracket connected to the second housing, the mounting bracket having a clamping groove for the grounding copper busbar of the surge arrester to extend into and be fixed.

[0013] According to some embodiments of the present invention, the first motherboard and the second motherboard are electrically connected by a wire, and a corrugated tube is sleeved on the wire.

[0014] According to some embodiments of the present invention, the leakage current monitoring module further includes a display panel and a current detection component. The display panel and the current detection component are both disposed inside the first housing and are electrically connected to the first motherboard. The first housing is provided with a low-voltage terminal for connecting the low-voltage end of the surge arrester. One end of the current detection component is electrically connected to the low-voltage terminal, and the other end is grounded.

[0015] This utility model has at least the following beneficial effects:

[0016] In this invention, the leakage current of the surge arrester is detected by the detection component on the leakage current monitoring module, and the grounding resistance of the surge arrester is detected by the grounding resistance monitoring module. Since the grounding resistance monitoring module is electrically connected to the first main board, the leakage current value detected by the detection component and the grounding resistance value detected by the grounding resistance monitoring module are sent to the first main board to realize the detection of leakage current and grounding resistance. When the operator detects that the grounding resistance value is too high, the surge arrester can be repaired in time to prevent the surge arrester from failing to conduct overvoltage to the ground in time, which would lead to the risk of damage to the power equipment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the structure of a surge arrester condition monitoring device provided in an embodiment of this utility model;

[0019] Figure 2 for Figure 1 A schematic diagram of the internal structure of the leakage current monitoring module in the diagram;

[0020] Figure 3 for Figure 1 A top view of the grounding resistance monitoring module in the system;

[0021] Figure 4 for Figure 1 A schematic diagram of the internal structure of the grounding resistance monitoring module in the diagram;

[0022] Figure 5 for Figure 4 A schematic diagram of the voltage and current sensor in the diagram.

[0023] Explanation of reference numerals in the attached figures:

[0024] 100-Surge arrester status monitoring device; 1-Leakage current monitoring module; 11-First housing; 12-First main board; 13-Display panel; 14-Current detection component; 15-Low voltage terminal; 2-Grounding resistance monitoring module; 21-Second housing; 211-Half housing; 2111-Reinforcing rib; 22-Voltage and current sensor; 221-First sensor component; 2211-Mounting groove; 222-Second sensor component; 223-Conductive bump; 23-Mounting bracket; 3-Wire; 200-Surge arrester grounding copper busbar. Detailed Implementation

[0025] The technical solutions in the embodiments of this utility model are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0027] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0028] This utility model provides a surge arrester status monitoring device. Figures 1 to 5 This invention provides a specific embodiment of a surge arrester condition monitoring device.

[0029] like Figure 1 and Figure 2 As shown, this utility model embodiment provides a surge arrester status monitoring device 100, including a leakage current monitoring module 1 and a grounding resistance monitoring module 2 sleeved on the surge arrester grounding copper busbar 200. The leakage current monitoring module 1 includes a first housing 11 and a first main board 12 disposed on the first housing 11. The grounding resistance monitoring module 2 is electrically connected to the first main board 12 so that the leakage current value detected by the leakage current monitoring module 1 and the grounding resistance value detected by the grounding resistance monitoring module 2 are sent to the first main board 12.

[0030] In this invention, the leakage current of the surge arrester is detected by the detection component on the leakage current monitoring module 1, and the grounding resistance of the surge arrester is detected by the grounding resistance monitoring module 2. Since the grounding resistance monitoring module 2 is electrically connected to the first main board 12, the leakage current value detected by the detection component and the grounding resistance value detected by the grounding resistance monitoring module 2 are sent to the first main board 12 to realize the detection of leakage current and grounding resistance. When the operator detects that the grounding resistance value is too high, the surge arrester can be repaired in time to prevent the surge arrester from failing to conduct the overvoltage to the ground in time, which would lead to the risk of damage to the power equipment.

[0031] Specifically, such as Figure 1 and Figure 2 As shown, the leakage current monitoring module 1 further includes a display panel 13 and a current detection component 14. Both the display panel 13 and the current detection component 14 are housed within the first housing 11 and are electrically connected to the first main board 12. The first housing 11 has a low-voltage terminal 15 for connecting the low-voltage end of the surge arrester. One end of the current detection component 14 is electrically connected to the low-voltage terminal 15, and the other end is grounded. With this configuration, the current detection component 14 detects the leakage current of the surge arrester and sends it to the first main board 12. The first main board 12 then sends the leakage current value and the grounding resistance value to the display panel 13, so that the leakage current value and the grounding resistance value are displayed on the display panel 13 in real time, facilitating real-time monitoring by staff.

[0032] Furthermore, in some embodiments, the leakage current monitoring module 1 further includes a lightning strike counting detection component, one end of which is electrically connected to the low-voltage terminal 15, and the other end is grounded. By recording the number of times the surge arrester operates under overvoltage conditions through the lightning strike counting detection component, the surge arrester's ability to withstand overvoltage impacts can be reflected. An excessive number of operations may indicate a decline in surge arrester performance or a more serious system overvoltage problem.

[0033] The specific structure of the grounding resistance monitoring module 2 is not limited, as long as it ensures that the grounding resistance monitoring module 2 can detect the grounding resistance of the surge arrester and send it to the first motherboard 12. Preferably, in some embodiments, such as Figures 3 to 5 As shown, the grounding resistance monitoring module 2 includes a second housing 21, a second main board, and a voltage and current sensor 22. Both the second main board and the voltage and current sensor 22 are housed within the second housing 21. The voltage and current sensor 22 is electrically connected to the second main board, and the second main board is electrically connected to the first main board 12. The voltage and current sensor 22 has a detection port through which the surge arrester grounding copper busbar 200 passes. With this configuration, the voltage and current sensor 22 detects the grounding resistance of the surge arrester and sends the detected grounding resistance value to the second main board, which then sends it to the first main board 12, thus achieving grounding resistance monitoring. It should be noted that the detection port of the voltage and current sensor 22 does not make contact with the surge arrester grounding copper busbar 200; detection is performed through induction.

[0034] The grounding resistance monitoring module 2 needs to be periodically removed for calibration after prolonged use. Since the voltage and current sensor 22 must be wrapped around the surge arrester grounding copper busbar 200, which is fixed during construction, removing the module requires damaging the grounding copper busbar before restoring it after sensor calibration. This significantly increases the workload. Therefore, in some embodiments, such as... Figure 5 As shown, the voltage and current sensor 22 includes a first sensor component 221 and a second sensor component 222. The first sensor component 221 and the second sensor component 222 are arranged in a semi-circular shape and are spliced ​​together to form a ring-shaped voltage and current sensor 22. By setting the voltage and current sensor 22 to be composed of two spliced ​​sensor components, when it is necessary to remove the voltage and current sensor 22, it is only necessary to disassemble the spliced ​​state of the first sensor component 221 and the second sensor component 222, which greatly reduces the workload of disassembling the voltage and current sensor 22.

[0035] Furthermore, in some embodiments, such as Figure 3 and Figure 4 As shown, the second housing 21 includes two half-housings 211, with the first sensor component 221 and the second sensor component 222 respectively disposed within the two half-housings 211. This arrangement allows for the assembly of the first sensor component 221 and the second sensor component 222 by directly splicing and fixing the two half-housings 211, simplifying the assembly and disassembly of the voltage and current sensor 22 and the second housing 21 into a single step, thus improving the efficiency of assembling and disassembling the grounding resistance monitoring module 2.

[0036] Preferably, in some embodiments, such as Figure 4 As shown, the inner wall of the semi-shell 211 is provided with a reinforcing rib 2111, and the outer wall of each sensor component has a mounting groove 2211 at a corresponding position for the reinforcing rib 2111 to extend into and be fixed. This arrangement, by providing the reinforcing rib 2111 on the semi-shell 211, improves the structural strength of the semi-shell 211. Furthermore, the cooperation between the reinforcing rib 2111 and the mounting groove 2211 ensures the connection and fixation between the semi-shell 211 and the sensor component, preventing the sensor component from moving within the semi-shell 211 and affecting the detection results.

[0037] Furthermore, in some embodiments, such as Figure 4As shown, multiple reinforcing ribs 2111 are provided, and the multiple reinforcing ribs 2111 are spaced apart in the thickness direction of the semi-shell 211. Each sensor component has a corresponding number of mounting slots 2211 at corresponding positions. In order for the surge arrester grounding copper busbar 200 to pass through, the semi-shell 211 has an area loss in its thickness direction, resulting in a lower structural strength in the thickness direction. By providing multiple reinforcing ribs 2111 in the thickness direction of the semi-shell 211, the structural strength of the semi-shell 211 in the thickness direction can be improved, and the movement of the sensor component in the thickness direction can also be restricted.

[0038] For safety reasons, the voltage and current sensor 22 is covered with an insulating layer. To avoid the insulating layer affecting the detection results, in some embodiments, such as... Figure 5 As shown, both ends of the first sensor component 221 and the second sensor component 222 are provided with conductive bumps 223. This arrangement, through the contact of the conductive bumps 223 on the two sensor components, makes the electrical conduction within the voltage and current sensor 22 more stable, avoiding any impact on the detection results.

[0039] The connection between the grounding resistance monitoring module 2 and the surge arrester grounding copper busbar 200 is not limited; for example, in some embodiments, such as... Figure 1 As shown, the grounding resistance monitoring module 2 also includes a mounting bracket 23 connected to the second housing 21. The mounting bracket 23 has a clamping groove for the surge arrester grounding copper busbar 200 to extend into and be fixed. With this configuration, the second housing 21 is fixed to the surge arrester grounding copper busbar 200 via the clamping groove on the mounting bracket 23, and the second housing 21 does not contact the surge arrester grounding copper busbar 200. This avoids contact between the inner wall of the detection port of the voltage and current sensor 22 inside the second housing 21 and the surge arrester grounding copper busbar 200, which could affect the detection results.

[0040] The electrical connection between the first motherboard 12 and the second motherboard can be a wireless communication module such as Bluetooth, or a wired connection, for example, in some embodiments, such as... Figure 1 As shown, the first motherboard 12 and the second motherboard are electrically connected via a wire 3, and a corrugated tube is fitted onto the wire 3. This configuration provides a wired connection between the first motherboard 12 and the second motherboard via the wire 3, which offers more stable signal transmission compared to wireless connections. Furthermore, the corrugated tube on the wire 3 protects any exposed wires.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A surge arrester condition monitoring device, characterized in that, The device includes a leakage current monitoring module and a grounding resistance monitoring module mounted on the grounding copper busbar of the surge arrester. The leakage current monitoring module includes a first housing and a first main board mounted on the first housing. The grounding resistance monitoring module is electrically connected to the first main board so that the leakage current value detected by the leakage current monitoring module and the grounding resistance value detected by the grounding resistance monitoring module can be sent to the first main board.

2. The surge arrester condition monitoring device as described in claim 1, characterized in that, The grounding resistance monitoring module includes a second housing, a second main board, and a voltage and current sensor. The second main board and the voltage and current sensor are both located inside the second housing. The voltage and current sensor is electrically connected to the second main board, and the second main board is electrically connected to the first main board. The voltage and current sensor has a detection port through which the grounding copper busbar of the surge arrester passes.

3. The surge arrester condition monitoring device as described in claim 2, characterized in that, The voltage and current sensor includes a first sensor component and a second sensor component, which are arranged in a semi-circular shape and are spliced ​​together to form a ring-shaped voltage and current sensor.

4. The surge arrester condition monitoring device as described in claim 3, characterized in that, The second housing includes two half-housings, with the first sensor component and the second sensor component respectively disposed within the two half-housings.

5. The surge arrester condition monitoring device as described in claim 4, characterized in that, The inner wall of the semi-shell is provided with reinforcing ribs, and the outer wall of each sensor component is provided with mounting grooves at corresponding positions for the reinforcing ribs to extend into and be fixed.

6. The surge arrester condition monitoring device as described in claim 5, characterized in that, The reinforcing ribs are provided in multiple ways, and the multiple reinforcing ribs are spaced apart in the thickness direction of the half shell. Each of the sensor components has a corresponding number of mounting slots at corresponding positions.

7. The surge arrester condition monitoring device as described in claim 3, characterized in that, Both ends of the first sensor component and the second sensor component are provided with conductive bumps.

8. The surge arrester condition monitoring device as described in claim 2, characterized in that, The grounding resistance monitoring module also includes a mounting bracket connected to the second housing, the mounting bracket having a clamping groove for the grounding copper busbar of the surge arrester to extend into and be fixed.

9. The surge arrester condition monitoring device as described in claim 2, characterized in that, The first motherboard and the second motherboard are electrically connected by wires, and the wires are fitted with corrugated tubes.

10. The surge arrester condition monitoring device as described in claim 1, characterized in that, The leakage current monitoring module also includes a display panel and a current detection component. The display panel and the current detection component are both located inside the first housing and are electrically connected to the first motherboard. The first housing is provided with a low-voltage terminal for connecting the low-voltage end of the surge arrester. One end of the current detection component is electrically connected to the low-voltage terminal, and the other end is grounded.

Images