An intelligent ground rod system

Abstract

The present invention discloses an intelligent grounding rod system, comprising a conductive upper clamp, a conductive lower clamp, and a support rod, wherein the upper clamp and the lower clamp are insulated and connected to each other to form an insulated grounding wire clamp, which is installed on the support rod, and further comprises a grounding wire 1, a grounding wire 2, a grounding rod 2, and a loop resistance measuring and transmitting device, wherein the upper clamp and the lower clamp are connected to the grounding rod 2 through the grounding wire 1 and the grounding wire 2, respectively, and the loop resistance measuring and transmitting device is installed on the grounding wire 2. The present invention can directly measure the loop resistance of the grounding rod system, not only to determine whether the wire clamp is in reliable contact, but also to make a real-time judgment on the contact effect, effectively avoiding misjudgment of the grounding wire rod caused by poor contact effect, debris on the cable surface, or an insulating layer, and ensuring the safety of on-site operators.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power maintenance operation equipment, and in particular to an intelligent grounding rod system. Background Art

[0002] Ground rods are essential tools in the operation, maintenance and inspection of power transmission lines, and are an important guarantee for personal safety. Current ground rods do not effectively monitor the grounding effect. Even if the ground rod is connected to the cable, there is no clear indication of the connection effect, and it can only be observed by the naked eye of on-site workers. However, the on-site conditions are relatively complex, and there are often situations of inadequate observation and human negligence, which cause safety risks in on-site operations.

[0003] Although some grounding rods currently have added the judgment of whether the cable contacts the mechanical position, such as a high-voltage grounding rod disclosed in a Chinese patent application (publication number CN110768034A) that adds a pressure sensor, a mechanical displacement sensor, etc., if there is dirt, debris, an insulating layer, etc. on the cable, even if the surface is in contact, the reliability of its grounding cannot be guaranteed, which also brings safety risks to the operators.

[0004] Therefore, directly monitoring the resistance of the grounding rod and judging the grounding status are of great significance to ensure the safety of on-site workers. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an intelligent grounding rod system for directly monitoring the grounding resistance of the field operation grounding rod system in real time, so as to solve the problem of personal safety risk of field workers caused by the current inability to monitor the grounding rod resistance in real time.

[0006] The technical solution adopted by the present invention is: an intelligent grounding rod system, including a conductive upper clamp, a conductive lower clamp, and a support rod. The upper clamp and the lower clamp are insulated and connected to each other to form an insulated grounding wire clamp, which is installed on the support rod. It also includes grounding wire one, grounding wire two, grounding rod two, grounding rod one and a loop resistance measuring and transmitting device. The upper clamp and the lower clamp are connected to grounding rod one and grounding rod two through grounding wire one and grounding wire two respectively, and the loop resistance measuring and transmitting device is installed on grounding wire two.

[0007] An intelligent grounding rod system comprises a conductive upper clamp, a conductive lower clamp and a support rod. The upper clamp and the lower clamp are insulated and connected to each other to form an insulating grounding wire clamp, which is installed on the support rod. The system also comprises a first grounding wire, a second grounding wire, a second grounding rod and a loop resistance measuring and transmitting device. The upper clamp and the lower clamp are connected to the second grounding rod through the first grounding wire and the second grounding wire respectively, and the loop resistance measuring and transmitting device is installed on the second grounding wire.

[0008] Preferably, the upper clamp, the second grounding wire, the second grounding rod, the first grounding rod, the first grounding wire, the lower clamp and the cable clamped by the grounding wire clamp form a loop or the upper clamp, the second grounding wire, the second grounding rod, the first grounding wire, the lower clamp and the cable clamped by the grounding wire clamp form a loop, and the loop resistance is:

[0009] R r =R1+R7+R8+R 10 +R6+R3+R 23 +R 21 or

[0010] R r =R1+R7+R8+R6+R3+R 23 +R 21 (1)

[0011] In the formula, R r is the loop resistance, R1 is the resistance of the upper clamp, R7 is the resistance of the second connecting wire, R8 is the resistance between the two connecting wires of the connecting rod 2 or the resistance between the connecting wire 2, R 10 is the resistance between the connecting rod 1 and the connecting wire 1, R6 is the resistance of the connecting wire 1, R3 is the resistance of the upper clamp, R 23 is the contact resistance between the lower clamp (3) and the cable (2), R 21 is the contact resistance between the upper clamp and the cable, the resistances between the upper clamp, the lower clamp (3), the second connecting rod, the first grounding rod and the two connecting wires are all negligible, and equation (1) is simplified to:

[0012] R r =R7+R6+R 23 +R 21 (2)

[0013] R t =R r -R7-R6 (3)

[0014] R t is the contact resistance between the cable and the two clamps, when R t >R d When the grounding state of the grounding rod is S g With R t The relationship is:

[0015]

[0016] In the formula, R d To design the maximum contact resistance, when S g =1, the system is well grounded and ready for the next step. g =0, the system grounding needs to be reprocessed.

[0017] Preferably, the above-mentioned loop resistance measuring and transmitting device includes a loop resistance sensor module, a sensor data acquisition and processing module, a sensor data transmission module, a power supply module, and a positioning module, including a loop resistance sensor module, a sensor data acquisition and processing module, a sensor data transmission module, a power supply module, and a positioning module. The loop resistance sensor module is connected to the sensor data acquisition and processing module, and the sensor data acquisition and processing module is connected to the sensor data transmission module, the power supply module, and the positioning module.

[0018] Preferably, the above-mentioned sensor data transmission module adopts a LoRa module, a WiFi module, a radio frequency module, a Bluetooth module, a GPRS module, a 4G module or a 5G module.

[0019] Preferably, the support rod is connected to the lower clamp, and an insulating threaded structure is provided at the upper end of the support rod. When the support rod is rotated, the lower clamp can move up and down.

[0020] Preferably, the lower clamp is rotatably connected to the support rod, and an insulating horizontal U-shaped groove is provided on one side of the lower clamp, and the horizontal U-shaped groove is movably clamped on the upper clamp.

[0021] Preferably, the ground rod 2 or the ground rod 1 is made of copper-plated stainless steel, stainless zinc-plated steel or stainless steel.

[0022] Beneficial effects of the present invention: Compared with the prior art, the present invention can directly measure the loop resistance of the grounding rod system, not only to determine whether the wire clamp is in reliable contact, but also to make a real-time judgment on the contact effect, effectively avoiding misjudgment of the grounding rod due to poor contact effect, debris on the cable surface or the insulation layer, and ensuring the safety of on-site workers. The present invention also transmits the grounding system status to the remote service center in real time, provides guidance and assistance for the next work arrangement, and saves maintenance time while ensuring the safety of personnel and equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of Example 1;

[0024] Figure 2 is a schematic diagram of the structure of the loop resistance measurement and transmission device in Embodiment 1 or 2;

[0025] Figure 3 It is a structural schematic diagram of the feeder switch fault current loop diagram of Example 2. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0027] Example 1: Figure 1 and 3As shown, an intelligent grounding rod system includes a conductive upper clamp 1, a conductive lower clamp 3, and a support rod 4. The upper clamp 1 and the lower clamp 3 are both provided with insulating layers on the inside and outside, and the cable clamping side is a bare metal clamping surface. The upper clamp 1 and the lower clamp 3 are insulated and connected to each other to form an insulating grounding wire clamp, which is installed on the support rod 4. It also includes a grounding wire 1 6, a grounding wire 2 7, a grounding rod 2 8 and a loop resistance measuring and transmitting device 5. The upper clamp 1 and the lower clamp 3 are connected to the grounding rod 2 8 through the grounding wire 1 6 and the grounding wire 2 7 respectively. The loop resistance measuring and transmitting device 5 is installed on the grounding wire 2 7. The insulating grounding wire clamp is similar to a grounding wire clamp disclosed in a Chinese patent application (application number CN201720654000.2).

[0028] Preferably, the upper clamp 1, the grounding wire 2 7, the grounding rod 2 8, the grounding rod 10, the grounding wire 1 6, the lower clamp 3 and the cable 2 clamped by the grounding clamp form a loop or the upper clamp 1, the grounding wire 2 7, the grounding rod 2 8, the grounding wire 1 6, the lower clamp 3 and the cable 2 clamped by the grounding clamp form a loop, and the loop resistance is:

[0029] R r =R1+R7+R8+R6+R3+R 23 +R 21 (1)

[0030] In the formula, R r is the loop resistance, R1 is the resistance of the upper clamp 1, R7 is the resistance of the connecting wire 7, R8 is the resistance between the connecting rod 8 and the connecting wire 2, R 10 is the resistance between the connecting rod 1 and the connecting wire 1, R6 is the resistance of the connecting wire 1 6, R3 is the resistance of the upper clamp 3, R 23 is the contact resistance between the lower clamp (3) and the cable (2), R 21 is the contact resistance between the upper clamp 1 and the cable 2. Since the resistances between the upper clamp 1, the lower clamp 3, the connecting rod 8 and the two connecting wires are small, they can be ignored. Formula (1) is simplified to:

[0031] R r =R7+R6+R 23 +R 21 (2)

[0032] R t =R r -R7-R6 (3)

[0033] R t is the contact resistance between the cable and the two clamps, when R t >R d When the grounding state of the grounding rod is S g With R t The relationship is:

[0034]

[0035] In the formula, R d To design the maximum contact resistance, when S g =1, the system is well grounded and ready for the next step. g =0, the system grounding needs to be reprocessed.

[0036] Preferably, the loop resistance measuring and transmitting device 5 comprises a loop resistance sensor module 55, a sensor data acquisition and processing module 51, a sensor data transmission module 52, a power supply module 53 and a positioning module 54, wherein the loop resistance sensor module 55 is connected to the sensor data acquisition and processing module 51, the sensor data acquisition and processing module 51 is connected to the sensor data transmission module 52, the power supply module 53 and the positioning module 54, and the wiring 7 is connected to the wiring 7. The loop resistance sensor module 55 passes through the loop resistance sensor module 55, which measures the loop resistance connected to the connecting wire 2 7 in real time. The data acquisition and processing module 51 acquires the loop resistance data measured by the loop resistance sensor module 55 in real time, and transmits it through the sensor data transmission module 52. The positioning module 54 obtains the position information in real time and transmits it through the sensor data transmission module 52. The power supply module 53 is connected to the loop resistance sensor module 55, the sensor data acquisition and processing module 51, the sensor data transmission module 52, the power supply module 53, and the positioning module 54, and provides power for the above modules.

[0037] Preferably, the sensor data transmission module 52 adopts a LoRa module, a WiFi module, a radio frequency module, a Bluetooth module, a GPRS module, a 4G module or a 5G module.

[0038] Preferably, the support rod 4 is connected to the lower clamp 3, and an insulating thread structure is provided at the upper end of the support rod 4. When the support rod 4 is rotated, the lower clamp 3 can move up and down.

[0039] Preferably, the lower clamp 3 is rotatably connected to the support rod 4 , and an insulating horizontal U-shaped groove is provided on one side of the lower clamp 3 , which is movably clamped on the upper clamp 1 .

[0040] Preferably, the grounding rod 2 8 or the grounding rod 1 8 is made of copper-plated stainless steel, stainless zinc-plated steel or stainless steel.

[0041] Example 2: Figure 2 and 3As shown, an intelligent grounding rod system includes a conductive upper clamp 1, a conductive lower clamp 3, and a support rod 4. The upper clamp 1 and the lower clamp 3 are both provided with insulating layers on the inside and outside, and the cable clamping side is a bare metal clamping surface. The upper clamp 1 and the lower clamp 3 are insulated and connected to each other to form an insulating grounding wire clamp, which is installed on the support rod 4. It also includes a grounding wire 1 6, a grounding wire 2 7, a grounding rod 2 8, a grounding rod 1 10 and a loop resistance measuring and transmitting device 5. The upper clamp 1 and the lower clamp 3 are respectively connected to the grounding rod 10 and the grounding rod 2 8 through the grounding wire 1 6 and the grounding wire 2 7, and the loop resistance measuring and transmitting device 5 is installed on the grounding wire 2 7.

[0042] Preferably, the upper clamp 1, the grounding wire 2 7, the grounding rod 2 8, the grounding rod 10, the grounding wire 1 6, the lower clamp 3 and the cable 2 clamped by the grounding clamp form a loop or the upper clamp 1, the grounding wire 2 7, the grounding rod 2 8, the grounding wire 1 6, the lower clamp 3 and the cable 2 clamped by the grounding clamp form a loop, and the loop resistance is:

[0043] R r =R1+R7+R8+R 10 +R6+R3+R 23 +R 21 (1)

[0044] In the formula, R r is the loop resistance, R1 is the resistance of the upper clamp 1, R7 is the resistance of the connecting wire 7, R8 is the resistance between the two connecting wires of the connecting rod 2 and 8, R6 is the resistance of the connecting wire 6, R3 is the resistance of the upper clamp 3, R 23 is the contact resistance between the lower clamp 3 and the cable 2, R 21 is the contact resistance between the upper clamp 1 and the cable 2. Since the resistances between the upper clamp 1, the lower clamp 3, the second connecting rod 8, the grounding rod 10 and the two connecting wires are small and can be ignored, equation (1) is simplified to:

[0045] R r =R7+R6+R 23 +R 21 (2)

[0046] R t =R r -R7-R6 (3)

[0047] R t is the contact resistance between the cable and the two clamps, when R t >R d When the grounding state of the grounding rod is S g With R t The relationship is:

[0048]

[0049] In the formula, R d To design the maximum contact resistance, when S g =1, the system is well grounded and ready for the next step. g =0, the system grounding needs to be reprocessed.

[0050] Preferably, the loop resistance measuring and transmitting device 5 comprises a loop resistance sensor module 55, a sensor data acquisition and processing module 51, a sensor data transmission module 52, a power supply module 53 and a positioning module 54, wherein the loop resistance sensor module 55 is connected to the sensor data acquisition and processing module 51, the sensor data acquisition and processing module 51 is connected to the sensor data transmission module 52, the power supply module 53 and the positioning module 54, and the wiring 7 is connected to the wiring 7. The loop resistance sensor module 55 passes through the loop resistance sensor module 55, which measures the loop resistance connected to the connecting wire 2 7 in real time. The data acquisition and processing module 51 acquires the loop resistance data measured by the loop resistance sensor module 55 in real time, and transmits it through the sensor data transmission module 52. The positioning module 54 obtains the position information in real time and transmits it through the sensor data transmission module 52. The power supply module 53 is connected to the loop resistance sensor module 55, the sensor data acquisition and processing module 51, the sensor data transmission module 52, the power supply module 53, and the positioning module 54, and provides power for the above modules.

[0051] Preferably, the sensor data transmission module 52 adopts a LoRa module, a WiFi module, a radio frequency module, a Bluetooth module, a GPRS module, a 4G module or a 5G module.

[0052] Preferably, the support rod 4 is connected to the lower clamp 3, and an insulating thread structure is provided at the upper end of the support rod 4. When the support rod 4 is rotated, the lower clamp 3 can move up and down.

[0053] Preferably, the lower clamp 3 is rotatably connected to the support rod 4 , and an insulating horizontal U-shaped groove is provided on one side of the lower clamp 3 , which is movably clamped on the upper clamp 1 .

[0054] Preferably, the grounding rod 2 8 or the grounding rod 1 8 is made of copper-plated stainless steel, stainless zinc-plated steel or stainless steel.

[0055] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An intelligent grounding rod system, comprising a conductive upper clamp (1), a conductive lower clamp (3), and a support rod (4), wherein the upper clamp (1) and the lower clamp (3) are insulated and connected to each other to form an insulating grounding wire clamp, and the insulating grounding wire clamp is installed on the support rod (4), characterized in that: It also includes a grounding wire 1 (6), a grounding wire 2 (7), a grounding rod 2 (8), a grounding rod 1 (10) and a loop resistance measuring and transmitting device (5). The upper clamp (1) and the lower clamp (3) are connected to the grounding rod 1 (10) and the grounding rod 2 (8) through the grounding wire 1 (6) and the grounding wire 2 (7), respectively. The loop resistance measuring and transmitting device (5) is installed on the grounding wire 2 (7). The upper clamp (1), grounding wire 2 (7), grounding rod 2 (8), grounding rod 1 (10), grounding wire 1 (6), lower clamp (3) and the cable (2) clamped by the grounding clamp form a loop, and the loop resistance is: R r =R1+R7+R8+R 10 +R6+R3+R 23 +R 21 (1) In the formula, R r is the loop resistance, R1 is the resistance of the upper clamp (1), R7 is the resistance of the second grounding wire (7), R8 is the resistance between the second grounding rod (8) and the second grounding wire, R 10 is the resistance between ground rod 1 and ground wire 1, R6 is the resistance of ground wire 1 (6), R3 is the resistance of lower clamp (3), R 23 is the contact resistance between the lower clamp (3) and the cable (2), R 21 is the contact resistance between the upper clamp (1) and the cable (2), and the resistances between the upper clamp (1), the lower clamp (3), the second grounding rod (8), the first grounding rod (10) and the two grounding wires are all negligible. Formula (1) is simplified to: R r =R7+R6+R 23 +R 21 (2) R t =R r -R7-R6 (3) R t is the contact resistance between the cable and the two clamps, when R t >R d When the grounding state of the grounding rod is S g With R t The relationship is: In the formula, R d To design the maximum contact resistance, when S g =1, the system is well grounded and ready for the next step. g =0, the system grounding needs to be reprocessed.

2. An intelligent grounding rod system, comprising a conductive upper clamp (1), a conductive lower clamp (3), and a support rod (4), wherein the upper clamp (1) and the lower clamp (3) are insulated and connected to each other to form an insulating grounding wire clamp, and the insulating grounding wire clamp is installed on the support rod (4), characterized in that: It also includes a grounding wire 1 (6), a grounding wire 2 (7), a grounding rod 2 (8) and a loop resistance measuring and transmitting device (5), wherein the upper clamp (1) and the lower clamp (3) are connected to the grounding rod 2 (8) through the grounding wire 1 (6) and the grounding wire 2 (7) respectively, and the loop resistance measuring and transmitting device (5) is installed on the grounding wire 2 (7); The upper clamp (1), the second grounding wire (7), the second grounding rod (8), the first grounding wire (6), the lower clamp (3) and the cable (2) clamped by the grounding clamp form a loop, and the loop resistance is: R r =R1+R7+R8+R6+R3+R 23 +R 21 (1) In the formula, R r is the loop resistance, R1 is the resistance of the upper clamp (1), R7 is the resistance of the second grounding wire (7), R8 is the resistance between the second grounding rod (8) and the two grounding wires, R6 is the resistance of the first grounding wire (6), R3 is the resistance of the lower clamp (3), R 23 is the contact resistance between the lower clamp (3) and the cable (2), R 21 is the contact resistance between the upper clamp (1) and the cable (2), and the resistances between the upper clamp (1), the lower clamp (3), the second grounding rod (8) and the two grounding wires are all negligible. Formula (1) is simplified to: R r =R7+R6+R 23 +R 21 (2) R t =R r -R7-R6 (3) R t is the contact resistance between the cable and the two clamps, when R t >R d When the grounding state of the grounding rod is S g With R t The relationship is: In the formula, R d To design the maximum contact resistance, when S g =1, the system is well grounded and ready for the next step. g =0, the system grounding needs to be reprocessed.

3. An intelligent grounding rod system according to claim 1 or 2, characterized in that: The loop resistance measuring and transmitting device (5) comprises a loop resistance sensor module (55), a sensor data acquisition and processing module (51), a sensor data transmission module (52), a power supply module (53), and a positioning module (54); the loop resistance sensor module (55) is connected to the sensor data acquisition and processing module (51), and the sensor data acquisition and processing module (51) is connected to the sensor data transmission module (52), the power supply module (53), and the positioning module (54).

4. The intelligent grounding rod system according to claim 3, characterized in that: The sensor data transmission module (52) adopts a LoRa module, a WiFi module, a radio frequency module, a Bluetooth module, a GPRS module, a 4G module or a 5G module.

5. An intelligent grounding rod system according to claim 1 or 2, characterized in that: The support rod (4) is connected to the lower clamp (3), and an insulating thread structure is arranged on the upper end of the support rod (4). When the support rod (4) is rotated, the lower clamp (3) can move up and down.

6. An intelligent grounding rod system according to claim 1 or 2, characterized in that: The lower clamp (3) is rotatably connected to the support rod (4), and an insulating horizontal U-shaped groove is arranged on one side of the lower clamp. The horizontal U-shaped groove is movably clamped on the upper clamp (1).

7. An intelligent grounding rod system according to claim 1 or 2, characterized in that: The grounding rod 2 (8) or the grounding rod 1 (10) is made of copper-plated stainless steel, zinc-plated stainless steel or stainless steel.

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