A surge arrester leakage current detection device based on resistive current measurement and calculation method.

Abstract

This utility model discloses a surge arrester leakage current detection device based on a resistive current measurement and calculation method. It includes a support shell, a support frame connected to the inner wall of the support shell, an electric push rod connected to the upper surface of the support frame, a rotating disk rotatably connected to the upper surface of the telescopic rod, a U-shaped block connected to the upper surface of the rotating disk, a connecting block rotatably connected to the inner wall of the U-shaped block, a rotating rod connected to the inner walls of the U-shaped block and the connecting block, a motor connected to the right side of the U-shaped block, and a solar panel connected to the upper surface of the connecting block. By incorporating a solar panel, the device can automatically extend and charge the solar panel when the external power supply is interrupted. Utilizing components such as the electric push rod, light source sensor, rotating disk, and motor, the device achieves automatic extension, positioning, and angle adjustment of the solar panel. In severe weather or after charging is complete, the solar panel can automatically retract into its placement slot, effectively preventing damage caused by wind or impact from foreign objects in severe weather.

Description

Technical Field

[0001] This utility model relates to the field of power equipment monitoring technology, specifically to a surge arrester leakage current detection device based on a resistive current measurement and calculation method. Background Technology

[0002] A surge arrester is a device used to protect buildings, communication equipment, power transmission lines, and other facilities from damage caused by lightning strikes. Its main function is to provide a low-impedance path for the lightning current when lightning occurs, allowing the lightning current to flow smoothly into the ground, thereby protecting the protected object from damage caused by high voltage. When lightning strikes the lightning arrester's lightning rod, which is usually a pointed metal object protruding above the building, it will guide the lightning to the surge arrester.

[0003] Traditional surge arrester leakage current monitoring devices suffer from high power consumption, poor anti-interference capabilities, and reliance on imported components, leading to insufficient long-term operational stability and high maintenance costs. Furthermore, existing devices mostly employ wired communication methods, making them unsuitable for remote monitoring in complex power scenarios. To address these issues, this invention proposes a surge arrester leakage current detection device based on a resistive current measurement and calculation method. By optimizing the hardware architecture and signal processing algorithms, it achieves high-precision current sampling, lightning strike event statistics, and remote data transmission, significantly improving equipment reliability and operational efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a surge arrester leakage current detection device based on a resistive current measurement and calculation method, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a surge arrester leakage current detection device based on a resistive current measurement and calculation method, comprising a support shell, a support frame connected to the inner wall of the support shell, an electric push rod connected to the upper surface of the support frame, a telescopic rod slidably connected to the inner wall of the electric push rod, the telescopic rod penetrating the inner wall of the support shell and extending to the outside, a rotating disk rotatably connected to the upper surface of the telescopic rod, a U-shaped block connected to the upper surface of the rotating disk, a connecting block rotatably connected to the inner wall of the U-shaped block, a rotating rod connected to the inner walls of the U-shaped block and the connecting block, a motor connected to the right side of the U-shaped block, the output end of the motor penetrating the outer wall of the U-shaped block and fixedly connected to one end of the rotating rod, a solar panel connected to the upper surface of the connecting block, a placement groove formed on the upper surface of the support shell, and a light source sensor connected to the upper surface of the support shell.

[0006] The back of the support shell is connected to a support plate, and the bottom surface of the support plate is connected to two fixing rods.

[0007] The inner wall of the support plate is connected to a data acquisition module, the front of the support plate is connected to a detection block, the front of the support plate is connected to a fixing plate, and the front of the detection block and the fixing plate are connected to a coil.

[0008] The bottom surface of the support shell is provided with a set of heat dissipation holes, and a filter plate is connected to the inner wall of the support shell.

[0009] The inner wall of the support shell is connected to a terminal block, the outer surface of the terminal block is connected to an analysis block, and the left side of the support shell is connected to a conduit.

[0010] The inner wall of the support shell is connected to a computing assembly block, and the inner wall of the support shell is also connected to a wireless communication module.

[0011] An alarm light is connected to the front of the support shell, a display panel is connected to the front of the support shell, and a set of control keys are installed on the front of the display panel.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention utilizes a solar panel to automatically extend and charge the device in the event of an external power outage, ensuring continuous operation of the monitoring device. Components such as an electric push rod, light source sensor, rotating disk, and motor enable automatic extension, positioning, and angle adjustment of the solar panel. In severe weather or after charging is complete, the solar panel automatically retracts into its placement slot, effectively preventing damage from wind or impacts during severe weather and extending its lifespan. Using solar energy as a backup power source reduces reliance on traditional energy sources. Optimized hardware architecture and signal processing algorithms enable high-precision current sampling, lightning strike event statistics, and remote data transmission, significantly improving equipment reliability and operational efficiency. To protect the power supply and other circuits, TVS protection is used at all functional circuit power interfaces. Furthermore, a well-designed PCB layout increases the grounding area, maximizing the preservation of a complete signal reference ground. Attached Figure Description

[0014] Figure 1 This is a frontal three-dimensional structural diagram of a surge arrester leakage current detection device based on a resistive current measurement and calculation method according to the present invention.

[0015] Figure 2 This is a three-dimensional structural diagram of a surge arrester leakage current detection device based on a resistive current measurement and calculation method, taken from an elevation view.

[0016] Figure 3 This is a front cross-sectional three-dimensional structural diagram of a surge arrester leakage current detection device based on a resistive current measurement and calculation method according to this utility model.

[0017] Figure 4 This is a rear cross-sectional three-dimensional structural diagram of a surge arrester leakage current detection device based on a resistive current measurement and calculation method according to this utility model.

[0018] Figure 5 This invention relates to a surge arrester leakage current detection device based on a resistive current measurement and calculation method. Figure 1 Schematic diagram of the three-dimensional structure of section A;

[0019] Figure 6 This utility model presents a power management circuit diagram for a surge arrester leakage current detection device based on a resistive current measurement and calculation method.

[0020] Figure 7 This is a circuit diagram of the display circuit interface of a surge arrester leakage current detection device based on a resistive current measurement and calculation method according to this utility model.

[0021] Figure 8 The present invention relates to a lightning strike count circuit diagram for a surge arrester leakage current detection device based on a resistive current measurement and calculation method.

[0022] Figure 9 This invention relates to a current amplification and sampling circuit diagram for a surge arrester leakage current detection device based on a resistive current measurement and calculation method.

[0023] In the diagram: 1. Support shell; 2. Conduit; 3. Support plate; 4. Light source sensor; 5. Placement slot; 6. Alarm light; 7. Rotating rod; 8. Display panel; 9. Fixing rod; 10. Control key; 11. Acquisition module; 12. Heat dissipation hole; 13. Solar panel; 14. Telescopic rod; 15. Wireless communication module; 16. Computing assembly; 17. Fixing plate; 18. Filter plate; 19. Coil; 20. Detection block; 21. Wiring board; 22. Analysis block; 23. Support frame; 24. Electric actuator; 25. Connecting block; 26. Motor; 27. Rotating disk; 28. U-shaped block. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-9This utility model provides a technical solution: a surge arrester leakage current detection device based on resistive current measurement and calculation method, including a support shell 1, which is made of aluminum alloy with IP67 protection rating. The interior is divided into independent chambers to isolate the power supply, signal processing and communication modules, and reduce electromagnetic interference. A support frame 23 is connected to the inner wall of the support shell 1, and an electric push rod 24 is connected to the upper surface of the support frame 23. A telescopic rod 14 is slidably connected to the inner wall of the electric push rod 24, and the telescopic rod 14 penetrates the inner wall of the support shell 1 and extends... Externally, a rotating disk 27 is rotatably connected to the upper surface of the telescopic rod 14. A U-shaped block 28 is connected to the upper surface of the rotating disk 27. A connecting block 25 is rotatably connected to the inner wall of the U-shaped block 28. A rotating rod 7 is connected to the inner walls of the U-shaped block 28 and the connecting block 25. A motor 26 is connected to the right side of the U-shaped block 28. The output end of the motor 26 passes through the outer wall of the U-shaped block 28 and is fixedly connected to one end of the rotating rod 7. A solar panel 13 is connected to the upper surface of the connecting block 25. The solar panel (5W / 12V) and the lithium iron phosphate battery (12V / 20Ah) are designed with dual power redundancy. A placement groove 5 is opened on the upper surface of the support shell 1. A light source sensor 4 is connected to the upper surface of the support shell 1.

[0026] The back of the support shell 1 is connected to a support plate 3, and the bottom surface of the support plate 3 is connected to two fixing rods 9. The fixing rods 9 can be used to securely install the monitoring device in a suitable position near the surge arrester, ensuring that the device will not move or shake due to external forces during operation, thereby improving the accuracy of the measurement.

[0027] The inner wall of the support plate 3 is connected to a data acquisition module 11, which is located on the inner wall of the support plate 3. The data acquisition module 11 is used to acquire current data. The front of the support plate 3 is connected to a detection block 20. The cooperation between the data acquisition module 11 and the detection block 20 enables data acquisition and detection to be performed and processed at the fastest speed. The front of the support plate 3 is connected to a fixing plate 17. The front of the detection block 20 and the fixing plate 17 are connected to a coil 19.

[0028] The bottom surface of the support shell 1 is provided with a set of heat dissipation holes 12, and the inner wall of the support shell 1 is connected with a filter plate 18. Avoiding the opening of heat dissipation holes 12 can reduce the entry of dust and moisture into the support shell 1. The filter plate 18 further plays the role of filtering particulate matter in the air, protecting the internal electronic components from the influence of dust and humidity, and extending the service life of the equipment.

[0029] The inner wall of the support shell 1 is connected to a terminal block 21, and the outer surface of the terminal block 21 is connected to an analysis block 22. The analysis block 22 is connected to the outer surface of the terminal block 21, which can realize real-time analysis and processing of leakage current signals, making it easy to quickly obtain monitoring data and make corresponding judgments. The left side of the support shell 1 is connected to a conduit 2.

[0030] The inner wall of the support shell 1 is connected to a computing assembly 16. The computing assembly 16 provides an overall metric for system performance, including accuracy, recall, and F1 score. The inner wall of the support shell 1 is also connected to a wireless communication module 15. The wireless communication module 15 integrates a domestic LoRa module (470MHz band), with a communication distance of ≥3km, supports timed wake-up and data pass-through, has a built-in Bluetooth 5.0 module for on-site parameter setting and firmware upgrade, and uses an SPI Flash storage chip (capacity 128MB) to support local storage of lightning strike waveforms and historical current data.

[0031] The front of the support shell 1 is connected to an alarm light 6, which can provide an intuitive visual alarm signal. When an abnormal leakage current is detected, it will immediately notify the maintenance personnel, so as to quickly respond to potential problems. The front of the support shell 1 is connected to a display panel 8, which uses a 1.3-inch OLED display (operating current ≤4μA) to display the leakage current value, the number of lightning strikes and the equipment status in real time. A set of control keys 10 is installed on the front of the display panel 8.

[0032] The low-power MCU uses a domestically produced low-power MCU with a sleep current as low as 3.4uA; the domestic MCU model is GD32LRCT6. The Bluetooth module is used for device parameter configuration, system updates, and operation and maintenance. The Bluetooth module is domestically produced, and its Bluetooth communication function enhances the device's operational capabilities. The power management system uses a domestically produced power management module, and considering the limitations of the device's power supply methods, a solar + lithium battery power supply solution is adopted. The power supply uses a high-efficiency DC-DC power chip to fully utilize the battery's discharge performance.

[0033] To ensure sampling accuracy, the current sampling circuit uses a current transformer for current coupling. To improve the anti-interference capability of weak current signals and ensure that high-order harmonics are not distorted, an IV differential conversion amplifier circuit is used (the amplifier uses a low-power rail-to-rail operational amplifier with an operating current not exceeding 200uA / channel). To ensure sampling accuracy, a 24-bit ADC is used for precise sampling. To enhance the front-end sampling circuit's resistance to current surges, a signal relay is used for isolation protection. In the working state, the signal relay is connected to the amplifier input; in the standby state, the transformer signal terminal is short-circuited.

[0034] Working Principle: During use, the operator first secures the device in a specific position using the fixing rod 9. Then, the acquisition module 11, in conjunction with the detection block 20, collects and detects the generated current in real time. The coil 19 amplifies and processes the current for easy reading and display. During prolonged use, heat dissipation occurs through the heat dissipation holes 12. In conjunction with the filter plate 18, external dust and moisture are isolated from the device, preventing them from entering the internal circuitry and causing damage. External cables are then connected via the conduit 2 and the junction box 21. The maximum allowable leakage current value calculated by the MUC inside the analysis block 22, in conjunction with the wireless communication module 15, is used to analyze and monitor the current. The data is transmitted in real time. If the detected leakage current approaches or exceeds the MUC value, the alarm light 6 will remind the staff. Finally, the current status is observed in real time through the display panel 8 and control key 10. When the external power supply fails and the device cannot work, the telescopic rod 14 inside the electric push rod 24 pushes the solar panel 13 out of the placement slot 5. Using the light source sensor 4, the rotating disk 27 automatically finds the light source. The motor 26 drives the rotating rod 7 to adjust the angle of the solar panel 13. When charging is completed or in bad weather, the electric push rod 24 drives the solar panel 13 back into the placement slot 5. This not only solves the problem of ensuring that the device will not lose power when the external power supply fails, but also avoids the problem of the solar panel 13 being blown away or damaged by debris blown up by bad weather.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lightning arrester leakage current detection device based on a resistive current-based measurement calculation method, comprising a support shell (1), characterized in that: The inner wall of the support shell (1) is connected to a support frame (23), the upper surface of the support frame (23) is connected to an electric actuator (24), the inner wall of the electric actuator (24) is slidably connected to a telescopic rod (14), the telescopic rod (14) penetrates the inner wall of the support shell (1) and extends to the outside, the upper surface of the telescopic rod (14) is rotatably connected to a rotating disk (27), the upper surface of the rotating disk (27) is connected to a U-shaped block (28), and the inner wall of the U-shaped block (28) is rotatably connected to a connecting block (…). 25), the inner wall of the U-shaped block (28) and the connecting block (25) is connected to a rotating rod (7), the right side of the U-shaped block (28) is connected to a motor (26), the output end of the motor (26) passes through the outer wall of the U-shaped block (28) and is fixedly connected to one end of the rotating rod (7), the upper surface of the connecting block (25) is connected to a solar panel (13), the upper surface of the support shell (1) is provided with a placement groove (5), and the upper surface of the support shell (1) is connected to a light source sensor (4).

2. The device for detecting the leakage current of the surge arrester based on the resistive current measurement calculation method according to claim 1, characterized in that: The back of the support shell (1) is connected to a support plate (3), and the bottom surface of the support plate (3) is connected to two fixing rods (9).

3. The device for detecting the leakage current of the surge arrester based on the resistive current measurement calculation method according to claim 2, characterized in that: The inner wall of the support plate (3) is connected to a data acquisition module (11), the front of the support plate (3) is connected to a detection block (20), the front of the support plate (3) is connected to a fixing plate (17), and the front of the detection block (20) and the fixing plate (17) are connected to a coil (19).

4. The surge arrester leakage current detection device based on resistive current measurement and calculation method according to claim 1, characterized in that: The bottom surface of the support shell (1) is provided with a set of heat dissipation holes (12), and the inner wall of the support shell (1) is connected with a filter plate (18).

5. The surge arrester leakage current detection device based on the resistive current measurement and calculation method according to claim 1, characterized in that: The inner wall of the support shell (1) is connected to a terminal block (21), the outer surface of the terminal block (21) is connected to an analysis block (22), and the left side of the support shell (1) is connected to a conduit (2).

6. The surge arrester leakage current detection device based on the resistive current measurement and calculation method according to claim 1, characterized in that: The inner wall of the support shell (1) is connected to a computing assembly (16), and the inner wall of the support shell (1) is connected to a wireless communication module (15).

7. The surge arrester leakage current detection device based on the resistive current measurement and calculation method according to claim 1, characterized in that: An alarm light (6) is connected to the front of the support shell (1), and a display panel (8) is connected to the front of the support shell (1). A set of control keys (10) is installed on the front of the display panel (8).

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