Measuring device for online monitoring of lightning arrester

Abstract

The utility model discloses a measuring device for on-line monitoring of a lightning arrester. The measuring device comprises the lightning arrester, a fixed seat, a lightning rod, a voltage reduction block, an integrated cable, a fixed column, a junction box, a lightning arrester measuring device, a bus voltage monitor and an insulation monitoring host. The lightning arrester measuring device is arranged, the mounting box is bound to the outer side of the fixing column through the binding belt, and the fixing stud and the fixing block are used for threaded fixation, so that the mounting box can be fixed, and data scanned by the sensor can be transmitted to the cloud platform through the Internet by the mounting box; according to the invention, a worker can conveniently and regularly check through the insulated monitoring host, so that the operation state of the lightning arrester can be measured through the lightning arrester measuring device, the current flowing condition in the power supply cable can be judged, and the worker can timely find the potential fault of the metal zinc oxide lightning arrester. And an important data basis is provided for state maintenance.

Description

Technical Field

[0001] This utility model relates to the field of surge arrester monitoring technology, and in particular to a measuring device for online monitoring of surge arresters. Background Technology

[0002] Zinc oxide surge arresters are one of the key components of power equipment, and the resistive current flowing through the arrester is an important indicator of its insulation performance. Real-time online monitoring of the arrester's total current, resistive current, capacitive current, number of lightning strikes, and timing of lightning strikes allows for real-time monitoring of the insulation status of high-voltage electrical equipment.

[0003] Meanwhile, by analyzing monitoring data, potential faults in metal oxide surge arresters can be detected in a timely manner, providing important data basis for condition-based maintenance. This provides a strong and reliable guarantee for the safe, reliable, stable, and economical operation of the power system, and provides reliable equipment insulation information and scientific maintenance basis for operation and maintenance personnel. As a result, the goal of reducing accidents, extending maintenance intervals, reducing the number and duration of power outages for maintenance, and improving equipment utilization and overall economic benefits can be achieved. Utility Model Content

[0004] Therefore, in order to overcome the above-mentioned shortcomings, this utility model provides a measuring device for online monitoring of surge arresters.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a measuring device for online monitoring of surge arresters, comprising a surge arrester, a fixed base, a lightning rod, a step-down block, an integrated cable, a fixed column, a junction box, a surge arrester measuring device, a bus voltage monitor, and an insulation monitoring host. The surge arrester is fixed to the top of the step-down block, the lightning rod is installed on the top of the surge arrester, the step-down block is installed on the top of the fixed base, an integrated cable is provided at the bottom of the step-down block, the integrated cable is connected to the rear end of the junction box, the fixed column is fixed to the bottom of the fixed base, the fixed column is deeply buried underground, the surge arrester measuring device is fixed to the outside of the fixed column, the bottom of the surge arrester measuring device is buried below the fixed column, the bus voltage monitor is mounted on the same cable, and the insulation monitoring host is telecommunicationly connected to the surge arrester measuring device and the bus voltage monitor via the Internet.

[0006] Preferably, the surge arrester measuring device includes a rain cover, a mounting box, a fixing block, a restraining strap, a conductor cable, a diffusion net, a dilution component, and a sensor. The rain cover is installed on the top of the mounting box, and a fixing block is installed at the rear end of the mounting box. The fixing block is fixed to the rear end of the fixing column with fixing bolts. The conductor cable is connected to the bottom of the mounting box, and a diffusion net is installed at the bottom of the conductor cable. A dilution component is installed inside the diffusion net, and the sensor is installed at the bottom of the mounting box.

[0007] In a further preferred embodiment, the dilution assembly includes a housing, an electromagnet, an adsorption magnet, an electric discharge cone, a transmission wire, and a warning device. The electromagnet is installed inside the housing, and the top of the electromagnet is magnetically attracted to the top of the adsorption magnet. The adsorption magnet is fixed to the top of the electric discharge cone. The transmission wire is laid inside the diffusion net and connected to the interior of the electromagnet. The warning device is fixed to the top of the housing.

[0008] In a further preferred embodiment, the conductors and integrated cables are encased inside the fixed post, thereby enabling them to better resist airflow erosion.

[0009] In a further preferred embodiment, the binding size of the restraint strap is consistent with the outer perimeter size of the fixing post.

[0010] In a further preferred embodiment, the diffusion network is provided with multiple sets of dilution components arranged in parallel within the diffusion network.

[0011] In a further preferred embodiment, the electromagnet, the adsorption magnet, and the discharge cone are arranged perpendicularly to the housing.

[0012] In a further preferred embodiment, the top of the electromagnet is provided with a through hole, and the transmission wire is ensured to be able to penetrate through the top of the electromagnet.

[0013] In a further preferred embodiment, the diffusion mesh can be made of insulating material to prevent current from flowing outward through the diffusion mesh, ensuring that the current flows downward under the guidance of the discharge cone.

[0014] In a further preferred embodiment, the CTGJ-SW surge arrester online monitoring device monitors the insulation performance of the zinc oxide surge arrester. The surge arrester online monitoring requires two devices: CTGJ-SM and CTGJ-S. CTGJ-SM is used to collect the three-phase leakage current of one group of surge arresters, and CTGJ-S is used to collect the three-phase voltage of the PT on the busbar where the surge arrester is located.

[0015] In a further preferred embodiment, the CTGJ-SW surge arrester online monitoring main IED and the status monitoring integrated server together constitute a surge arrester online monitoring system, the system composition of which is as follows: Figure 3 As shown, the surge arrester online monitoring system adopts an advanced hierarchical distributed structure, applies bus control technology and modular design principles, which greatly improves the system's anti-interference performance, measurement accuracy and stability, meeting the practical requirements of industrial sites. It also uses a unique expert diagnostic system to scientifically analyze and diagnose the collected data, making it convenient and timely to understand and grasp the health status of the power equipment.

[0016] In a further preferred embodiment, the CTGJ-SW surge arrester online monitoring main IED and the status monitoring integrated server together constitute a surge arrester online monitoring system. The surge arrester online monitoring system adopts an advanced hierarchical distributed structure, applies bus control technology and modular design principles, which greatly improves the system's anti-interference performance, measurement accuracy and stability, meets the practical requirements of industrial sites, and uses a unique expert diagnostic system to scientifically analyze and diagnose the collected data, making it convenient and timely to understand and grasp the health status of the power equipment.

[0017] In a further preferred embodiment, the sensor is a high-precision active sensor that automatically selects the amplification factor according to the magnitude of the measured current to achieve high-precision measurement.

[0018] In a further preferred embodiment, the mounting box employs a dynamic phasor compensation algorithm to achieve high-precision measurement signal analysis, and uses a digital filtering algorithm to eliminate the "zero drift problem" caused by analog filters.

[0019] In a further preferred embodiment, the surge arrester measuring device adopts a distributed measuring structure, i.e., local measurement and digital transmission; it can be installed while energized, i.e., installation does not require power outage of the main equipment, and it can be conveniently and quickly connected to the system.

[0020] The beneficial effects of this utility model are:

[0021] This invention incorporates a surge arrester measuring device. The mounting box is secured to the outside of a fixed column using straps and threaded onto a fixing block with studs, ensuring its stability. The mounting box then transmits the current and voltage from the integrated cable to the diffuser network via wires and cables. The diffuser network, through a dilution component, dilutes the current and voltage deep underground, allowing the sensor to scan and monitor the temperature of the dilution component. The mounting box transmits the sensor data to a cloud platform via the internet, enabling staff to periodically check the data through a source monitoring host. This allows for the measurement of the surge arrester's operating status using the surge arrester measuring device, thereby determining the current flow in the power cable. This ensures that staff can promptly detect potential faults in the metal oxide surge arrester and provides crucial data for condition-based maintenance.

[0022] This invention incorporates a dilution component. By transmitting current and voltage into the transmission conductor, the transmission conductor can transmit current to the electromagnet, allowing the electromagnet to pass through normally. This ensures that the electromagnet generates magnetic force, which interacts with the attracting magnet. The attracting magnet causes the current-discharging cone to rise downwards, thereby allowing the current-discharging cone to discharge the current from the electromagnet and the transmission conductor. By diluting the current in the integrated cable through multiple sets of current-discharging cones, the current in the integrated cable is simultaneously diluted by multiple sets of dilution components, thus preventing excessive current pressure. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the planar structure of this utility model;

[0025] Figure 3 This is a schematic diagram of the monitoring system in this utility model;

[0026] Figure 4 This is a three-dimensional structural diagram of the surge arrester measuring device of this utility model;

[0027] Figure 5 This is a schematic diagram of the dilution component structure of this utility model;

[0028] Figure 6 This is a schematic diagram of the algorithm synchronization principle in this utility model.

[0029] Among them: surge arrester-1, mounting base-2, lightning rod-3, voltage reducing block-4, integrated cable-5, fixing column-6, junction box-7, surge arrester measuring device-8, bus voltage monitor-9, insulation monitoring host-10, rain cover-81, mounting box-82, fixing block-83, restraint strap-84, conductor cable-85, diffusion net-86, dilution component-87, sensor-88, housing-871, electromagnet-872, adsorption magnet-873, discharge cone-874, transmission wire-875, early warning device-876. Detailed Implementation

[0030] To further explain the technical solution of this utility model, a detailed description is provided below through specific embodiments.

[0031] Please see Figures 1-3 , Figure 6This utility model provides a measuring device for online monitoring of surge arresters, including 1, a fixed base 2, a lightning rod 3, a voltage-reducing block 4, an integrated cable 5, a fixed column 6, a junction box 7, a surge arrester measuring device 8, a bus voltage monitor 9, and an insulation monitoring host 10. The surge arrester 1 is fixed to the top of the voltage-reducing block 4, the lightning rod 3 is installed on the top of the surge arrester 1, the voltage-reducing block 4 is installed on the top of the fixed base 2, the integrated cable 5 is provided at the bottom of the voltage-reducing block 4, the integrated cable 5 is connected to the rear end of the junction box 7, the fixed column 6 is fixed to the bottom of the fixed base 2, the fixed column 6 is deeply buried underground, the surge arrester measuring device 8 is fixed to the outside of the fixed column 6, the bottom of the surge arrester measuring device 8 is buried below the fixed column 6, the bus voltage monitor 9 is built on the same cable, and the insulation monitoring host 10 is telecommunicationly connected to the surge arrester measuring device 8 and the bus voltage monitor 9 via the Internet.

[0032] Please see Figure 4 This utility model provides a measuring device for online monitoring of surge arresters. The surge arrester measuring device 8 includes a rain cover 81, a mounting box 82, a fixing block 83, a restraint strap 84, a wire cable 85, a diffusion net 86, a dilution component 87, and a sensor 88. The rain cover 81 is installed on the top of the mounting box 82. The fixing block 83 is installed at the rear end of the mounting box 82. The fixing block 83 is fixed to the rear end of the fixing column 6 with fixing bolts. The wire cable 85 is connected to the bottom of the mounting box 82. The diffusion net 86 is installed at the bottom of the wire cable 85. The dilution component 87 is installed inside the diffusion net 86. The sensor 88 is installed below the mounting box 82.

[0033] In this embodiment, the wire cable 85 and the integrated cable 5 are wrapped inside the fixing post 6, so that the wire cable 85 and the integrated cable 5 can better resist the erosion of the airflow. The binding size of the binding strap 84 is consistent with the outer size of the fixing post 6.

[0034] Please see Figure 5 This utility model provides a measuring device for online monitoring of surge arresters. The dilution assembly 87 includes a housing 871, an electromagnet 872, an adsorption magnet 873, a discharge cone 874, a transmission wire 875, and an early warning device 876. The electromagnet 872 is installed inside the housing 871. The top of the electromagnet 872 is magnetically attracted to the top of the adsorption magnet 873. The adsorption magnet 873 is fixed to the top of the discharge cone 874. The transmission wire 875 is laid inside the diffusion net 86 and is connected to the inside of the electromagnet 872. The early warning device 876 is fixed to the top of the housing 871.

[0035] In this embodiment, the electromagnet 872, the adsorption magnet 873, and the discharge cone 874 are vertically arranged on the housing 871. The top of the electromagnet 872 is provided with a wire hole, and the transmission wire 875 is ensured to be able to pass through the top of the electromagnet 872. The diffusion net 86 can be made of insulating material to prevent current from flowing outward through the diffusion net 86, and to ensure that the current can flow downward under the guidance of the discharge cone 874.

[0036] See Figures 1-6 In use, surge arrester 1 is fixed to the top of the fixed column 6, providing stable support for the equipment. Surge arrester 1 is positioned outside the power supply cable to ensure its protective function. During operation, lightning rod 3 works in conjunction with surge arrester 1 to protect the power supply cable. Surge arrester 1 protects electrical equipment from transient overvoltage damage by releasing overvoltage energy from lightning or power system operation. The surge arrester is connected in parallel with the protected equipment. When the grid voltage rises to the operating voltage of the surge arrester, it will quickly activate, limiting the voltage amplitude and ensuring the safety of the equipment insulation.

[0037] When the voltage of surge arrester 1 is too high, the step-down block 4 can use its own material to start and reduce the excessive voltage and current of surge arrester 1. Subsequently, the integrated cable 5 is placed at the bottom of the step-down block 4 so that the current and voltage in the integrated cable 5 can be transmitted downward to the inside of the surge arrester measuring device 8.

[0038] When testing is required, maintenance personnel can open junction box 7 to test the current flow in junction box 7, ensuring that the equipment testing can be completed through junction box 7;

[0039] Meanwhile, the mounting box 82 is secured to the outside of the fixing post 6 by the binding strap 84, and the fixing studs are used to fix it to the fixing block 83 by thread to ensure that the mounting box 82 can be fixed. Then, the mounting box 82 can transmit the current and voltage in the integrated cable 5 to the inside of the diffusion net 86 through the wire cable 85, so that the diffusion net 86 dilutes the current and voltage to the depth of the ground through the dilution component 87.

[0040] Subsequently, by transmitting current and voltage to the inside of the transmission wire 875, the transmission wire 875 can transmit current to the inside of the electromagnet 872. The electromagnet 872 can pass electricity normally, ensuring that the electromagnet 872 can generate magnetic force and cooperate with the adsorption magnet 873. The adsorption magnet 873 carries the current discharge cone 874 downward, thereby allowing the current discharge cone 874 to discharge the current inside the electromagnet 872 and the transmission wire 875. The current in the integrated cable 5 is diluted by multiple sets of current discharge cones 874, and then the current in the integrated cable 5 is diluted synchronously by multiple sets of dilution components 87, thereby avoiding excessive current pressure.

[0041] By setting up sensor 88, the sensor 88 can scan and monitor the temperature of the dilution component 87. This ensures that the installation box 82 can transmit the data scanned by sensor 88 to the cloud platform via the Internet. This allows staff to check the data periodically through the insulation monitoring host 10, thereby measuring the operating status of the surge arrester 1 through the surge arrester measuring device 8. This helps determine the current flow in the power supply cable, ensuring that staff can promptly detect potential faults in the metal oxide zinc surge arrester and provide important data for condition-based maintenance.

[0042] The control method of this utility model is to control the device by manually starting and stopping the switch. The wiring diagram of the power element and the supply of power are common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and wiring layout will not be explained in detail.

[0043] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail.

[0044] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 measuring device for online monitoring of surge arresters, comprising a surge arrester (1), a mounting base (2), a lightning rod (3), a step-down block (4), an integrated cable (5), a fixing post (6), a junction box (7), a surge arrester measuring device (8), a bus voltage monitor (9), and an insulation monitoring host (10), wherein the surge arrester (1) is fixed to the top of the step-down block (4), and the lightning rod (3) is installed on the top of the surge arrester (1); Its features are: The surge arrester measuring device (8) includes a rain cover (81), a mounting box (82), a fixing block (83), a restraint strap (84), a wire and cable (85), a diffusion net (86), a dilution component (87), and a sensor (88). The rain cover (81) is installed on the top of the mounting box (82). The fixing block (83) is installed at the rear end of the mounting box (82). The fixing block (83) is fixed to the rear end of the fixing column (6) with fixing bolts. The wire and cable (85) is connected to the bottom of the mounting box (82). The diffusion net (86) is installed at the bottom of the wire and cable (85). The dilution component (87) is installed inside the diffusion net (86). The sensor (88) is installed below the mounting box (82).

2. The measuring device for online monitoring of surge arresters according to claim 1, characterized in that: The dilution assembly (87) includes a housing (871), an electromagnet (872), an adsorption magnet (873), a discharge cone (874), a transmission wire (875), and a warning device (876). The electromagnet (872) is installed inside the housing (871). The electromagnet (872) is magnetically attracted to the top of the adsorption magnet (873). The adsorption magnet (873) is fixed to the top of the discharge cone (874). The transmission wire (875) is laid inside the diffusion net (86) and is connected to the inside of the electromagnet (872). The warning device (876) is fixed to the top of the housing (871).

3. The measuring device for online monitoring of surge arresters according to claim 1, characterized in that: The step-down block (4) is installed on the top of the fixed base (2). An integrated cable (5) is provided at the bottom of the step-down block (4). The integrated cable (5) is connected to the rear end of the junction box (7). The fixed column (6) is fixed to the bottom of the fixed base (2). The fixed column (6) is buried deep underground. The surge arrester measuring device (8) is fixed to the outside of the fixed column (6). The bottom of the surge arrester measuring device (8) is buried below the fixed column (6). The bus voltage monitor (9) is built on the same cable. The insulation monitoring host (10) is connected to the surge arrester measuring device (8) and the bus voltage monitor (9) via the Internet.

4. The measuring device for online monitoring of surge arresters according to claim 1, characterized in that: The wires and cables (85) and the integrated cable (5) are encased inside the fixed post (6) so that the wires and cables (85) and the integrated cable (5) can better resist the erosion of airflow.

5. The measuring device for online monitoring of surge arresters according to claim 1, characterized in that: The binding size of the binding strap (84) is consistent with the outer size of the fixing post (6).

6. The measuring device for online monitoring of surge arresters according to claim 1, characterized in that: The diffusion network (86) is provided with multiple sets of dilution components (87) inside, which are arranged in parallel inside the diffusion network (86).

7. The measuring device for online monitoring of surge arresters according to claim 2, characterized in that: The electromagnet (872), the adsorption magnet (873), and the discharge cone (874) are vertically arranged on the housing (871).

8. The measuring device for online monitoring of surge arresters according to claim 2, characterized in that: The top of the electromagnet (872) is provided with a wire hole, and the transmission wire (875) is guaranteed to be able to penetrate the top of the electromagnet (872).

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