Lightning arrester visual monitoring device based on leakage current monitoring

Abstract

The invention discloses a lightning arrester visual monitoring device based on leakage current monitoring, which adopts a cross-core current transformer to detect the leakage current of a lightning arrester and the number of lightning protection actions, display the current value and the number of actions, and transmit wireless transmission data to realize on-line monitoring, so that the degraded lightning arrester can be found in time, and serious faults can be avoided. The maintenance efficiency is improved; a lightning arrester visual monitoring device based on leakage current monitoring comprises a shell, a power supply, a display screen, an antenna, a cross-core current transformer and a circuit board, the shell is composed of a bottom plate, a box body and a cover plate, the circuit board is arranged in the shell, one side of the shell is provided with the antenna, the other side of the shell is provided with an access power supply, and the output end of the power supply is connected with the circuit board. The circuit board is connected with the antenna; the straight-through current transformer is arranged on a threading pipe in the box body in a sleeving manner, the straight-through current transformer is connected with the bottom plate through a fixing clamp, and the output end of the straight-through current transformer is connected with the circuit board; and a display screen is arranged on the cover plate.

Description

Technical Field

[0001] The invention relates to the technical field of lightning arrester leakage current monitoring, and in particular to a lightning arrester visual monitoring device based on leakage current monitoring. Background Art

[0002] Zinc oxide lightning arrester is one of the most widely used lightning arresters at present. It uses zinc oxide as a varistor material and has the advantages of fast response speed, strong impact resistance, and high cost performance. It is suitable for the protection of power systems, communication equipment, buildings, and important industrial equipment.

[0003] The leakage current of zinc oxide arrester can determine whether the performance of arrester is normal. When the leakage current is too large, it indicates that the arrester is faulty and measures need to be taken for maintenance or replacement. The number of lightning protection actions of the arrester can timely detect the action of the arrester in the lightning event to avoid lightning accidents caused by arrester failure. Therefore, monitoring the leakage current (effective value) and lightning protection action number of zinc oxide arrester can timely detect the deteriorated arrester and avoid the serious failure caused by it, which is of great significance for the safe operation of power system and equipment.

[0004] There are some monitoring methods in the existing technology, but there is no device that can provide real-time online monitoring and intuitive readings at the maintenance site to meet the needs of existing smart substations. Summary of the invention

[0005] The present invention aims to address the technical defects of the prior art and discloses a visual monitoring device for lightning arresters based on leakage current monitoring. A through-hole current transformer is used to detect the leakage current of the lightning arrester and the number of lightning protection actions, and the current value and the number of actions are displayed. Wireless transmission data is sent to realize online monitoring, so as to timely discover the deteriorated lightning arrester and avoid causing serious faults, thereby improving the maintenance efficiency.

[0006] The present invention provides the following technical solutions: A visual monitoring device for lightning arresters based on leakage current monitoring, comprising a housing, a power supply, a display screen, an antenna, a through-core current transformer and a circuit board; The housing comprises a bottom plate, a box body and a cover plate, a circuit board is arranged in the housing, an antenna is arranged on one side of the housing, and an access power supply is arranged on the other side of the housing, an output end of the access power supply is connected to the circuit board, and the circuit board is connected to the antenna; The box body is provided with a through hole, the through hole forms an opening on both sides of the box body, a threading tube for passing the arrester grounding wire is provided in the through hole, both ends of the threading tube are sealed and connected with the through hole of the box body, the through-core current transformer is sleeved on the threading tube inside the box body, the through-core current transformer is connected to the bottom plate through a fixing clip, and the output end of the through-core current transformer is connected to the circuit board; The cover plate is provided with a display screen, and the display screen is electrically connected to the circuit board.

[0007] As a preferred embodiment of the present invention: Waterproof joints are arranged at the opening positions on both sides of the box body.

[0008] As a preferred embodiment of the present invention: The fixing clip is provided with mounting ears on both sides, and the fixing clip is fixed to the bottom plate through the mounting ears. A space for accommodating the through-core current transformer is provided in the middle of the fixing clip.

[0009] As a preferred embodiment of the present invention: A clamp seat is installed on the surface of the base plate away from the cover plate. The clamp seat is integrally formed, and grooves are set on both sides of the clamp seat. Mounting holes are respectively set at the bottom of the grooves. A trapezoidal protrusion is set in the middle part of the clamp seat, and strip holes for the clamp to pass through are opened on both sides of the trapezoidal protrusion.

[0010] Further: The access power source is a battery pack, which includes a solar panel and a battery. The solar panel is arranged on the cover plate, the solar panel is electrically connected to the battery, the output end of the battery is connected to the circuit board, and a debugging port, an air release valve and a power switch are provided at the bottom of the box body. The debugging port is a 6-core aviation plug.

[0011] Further: The display screen is an LED screen.

[0012] Further: The access power source is a DC24V external power source, and the bottom of the box body is provided with two groups of bellows connectors, a debugging port, and a power switch, wherein the DC24V external power source is supplied in series through the two groups of bellows connectors.

[0013] Further: The display screen is a digital tube.

[0014] Further: The circuit board includes an MCU control module, a LORA wireless communication module, a current acquisition module, an EEPROM module, and a power module; The MCU control module uses the LoRa470MHz wireless frequency band to interact with the LORA wireless communication module through SPI, and the LORA wireless communication module transmits the collected data to an external concentrator through wireless transmission; The display screen receives the display control instruction of the MCU control module, and displays the leakage current value of the lightning arrester and the number of lightning strike protection actions in segments.

[0015] Further: A temperature and humidity sensor is arranged at the bottom of the box body.

[0016] Compared with the prior art, the present invention has the following beneficial effects: In the above technical scheme, the visual monitoring device for lightning arresters based on leakage current monitoring disclosed by the present invention has a compact structure and is easy to install. When in use, after the grounding wire of the lightning arrester passes through the threading tube of the device, it also passes through the through-core current transformer of the device. When working, the through-core current transformer collects the leakage current of the grounding wire of the lightning arrester in real time; The device can be reliably installed on the arrester or the surrounding position of the arrester equipment through a clamp, can realize on-site digital display and has a remote transmission function, adopts a through-core current transformer to detect the leakage current of the arrester and the number of lightning protection actions, displays the current value and the number of actions, and realizes online monitoring through wireless transmission data transmission, so as to timely discover the deteriorated arrester and avoid causing serious faults, thereby improving the maintenance efficiency; it can carry out continuous real-time or periodic automatic monitoring of the leakage current and the number of lightning protection actions of the metal zinc oxide arrester in real time, realize automatic measurement and data collection, reduce manual operation, and improve work efficiency. At the same time, a display screen is set on site to intuitively display the current value and the number of actions, so that the on-site maintenance personnel can observe these data at the first time, so as to quickly judge the working condition of the arrester, discover potential problems in time, and take technical measures for maintenance.

[0017] The device's power supply supplies power for the entire device, the antenna transmits data wirelessly, and the grounding wire passes through a through-core current transformer to monitor the arrester's leakage current. Through a combination of on-site visual maintenance and online monitoring, deteriorated arresters can be discovered in a timely manner to avoid causing serious failures, thereby improving maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a circuit control diagram of the present invention; Figure 2 It is a schematic diagram of a three-dimensional structure of a specific embodiment of the present invention; Figure 3 for Figure 1 A schematic diagram of a three-dimensional structure from another angle; Figure 4 for Figure 1 A partial cross-sectional view of Figure 5 Schematic diagram of the three-dimensional structure of the clamp; Figure 6 is a schematic diagram of the three-dimensional structure of the fixing clip; Figure 7 It is a schematic diagram of the three-dimensional structure of another specific embodiment of the present invention; Figure 8 for Figure 7 A schematic diagram of a three-dimensional structure from another angle; Fig. 9for Figure 7 A partial cross-sectional view of .

[0019] Description of reference numerals: 1. Bottom plate; 2. Box body; 3. Cover plate; 4. Display screen; 5. Antenna; 6. Solar panel; 7. Through-core current transformer; 8. Circuit board; 9. Clamp seat; 10. Power switch; 11. 6-core aviation plug; 12. Air release valve; 13. Bellows joint; 14. Waterproof joint; 15. Battery; 16. Fixing clip; 901. Clamp. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. All other embodiments obtained by ordinary technicians in the field without making creative work based on the embodiments of the present invention shall fall within the scope of protection of the present invention.

[0021] The present invention discloses a visual monitoring device for lightning arresters based on leakage current monitoring. A through-hole current transformer is used to detect the leakage current of the lightning arrester and the number of lightning protection actions, and the current value and the number of actions are displayed. The magnitude of the leakage current reflects the performance of the lightning arrester on the one hand, and the lightning protection actions of the lightning arrester can be counted through the leakage current value on the other hand. The present invention realizes online monitoring through wireless transmission of data, timely discovers deteriorated lightning arresters, and avoids causing serious faults. The organic combination of on-site visual maintenance and online monitoring improves the maintenance efficiency.

[0022] The present invention realizes visual online monitoring of the leakage current (effective value) and the number of lightning protection actions of the zinc oxide lightning arrester, is easy to install, and has significant technical advantages.

[0023] In a specific embodiment of the present invention: Visual monitoring device for lightning arresters based on leakage current monitoring, such as Figures 1 to 6As shown, it includes a shell, a power supply, a display screen 4, an antenna 5, a through-current transformer 7, and a circuit board 8, wherein the shell is composed of a bottom plate 1, a box body 2 and a cover plate 3, a circuit board 8 is arranged in the shell, an antenna 5 is arranged on one side of the shell, and an access power supply is arranged on the other side of the shell, the output end of the power supply is connected to the circuit board 8, and the circuit board 8 is connected to the antenna 5; a through hole is arranged on the box body 2, a threading tube for inserting a ground wire is arranged on the through hole, and both ends of the threading tube are sealed and connected to the through hole on the shell, the through-current transformer 7 is sleeved on the threading tube inside the box body 2, and the through-current transformer 7 The bottom plate 1 is connected to the output end of the through-core current transformer 7 by a fixing clamp 16, and the output end of the through-core current transformer 7 is connected to the circuit board 8; the cover plate 3 is provided with a display screen 4, and the display screen 4 is electrically connected to the circuit board 8; waterproof joints 14 are provided on the through holes on both sides of the box body 2; mounting ears are provided on both sides of the fixing clamp 16, and the fixing ears are fixed to the bottom plate 1, and a space for accommodating the through-core current transformer 7 is provided in the middle of the fixing clamp 16; a clamp seat 9 is provided on the rear side of the bottom plate 1, and the clamp seat 9 is integrally formed, and grooves are provided on both sides of the clamp seat 9, and mounting holes are provided at the bottom of the grooves, and a trapezoidal protrusion is provided in the middle part of the clamp seat 9, and the trapezoidal protrusions on both sides A strip hole for the clamp 901 to pass through is opened on the side; the access power supply is powered by a battery 15 group, and the battery 15 group includes a solar panel 6 and a battery 15, the solar panel 6 is arranged on the cover plate 3, the solar panel 6 is electrically connected to the battery 15, and the output end of the battery 15 is connected to the circuit board 8, and a debugging port, a venting valve 12, and a power switch 10 are provided at the bottom of the box body 2, and the debugging port is a 6-core aviation plug 11; the display screen 4 is an LED screen, and the circuit board 8 includes an MCU control module, a LORA wireless communication module, a current acquisition module, an EEPROM module (EEPROM memory), and a power module; The MCU control module uses the LoRa MHz wireless frequency band to exchange data with the LORA wireless communication module through SPI (serial peripheral interface), and the LORA wireless communication module transmits the collected data to the concentrator through wireless transmission; the display screen 4 receives the display control instruction of the MCU control module, and displays the arrester leakage current value and the number of lightning strike protection actions in segments; the segmented display in this embodiment can be to divide the display screen 4 into two left and right areas, the left area displays the arrester leakage current value, and the right area displays the arrester lightning strike protection number, and a temperature and humidity sensor is provided at the bottom of the box body 2.

[0024] The structural features of this embodiment are as follows: The device is sustainably powered by the solar panel and does not require on-site power access, which solves the problem of poor on-site power supply. The battery 15 is divided into a rechargeable battery 15 and a backup battery 15. The main and backup parts are switched according to the situation. Since the LED screen is preferably powered by solar energy, it is energy-saving and power-saving. It is a passive wireless visual monitoring device for lightning arresters based on leakage current monitoring. It has a compact structure and is easy to install. It uses a through-core current transformer 7 to detect the leakage current of the lightning arrester and the number of lightning protection actions, displays the current value and the number of actions, and transmits data wirelessly to achieve online monitoring, so as to promptly detect deteriorated lightning arresters and avoid causing serious failures, thereby improving maintenance efficiency. The wireless transmission mode of the RS485 bus interface circuit is adopted. The waterproof connector 14 is selected for the installation of the ground wire. The waterproof connector 14 has good waterproof performance and can prevent liquids such as water and moisture from penetrating, thereby ensuring the normal operation of the device; the design of the fixing clamp 16 makes the through-core current transformer 7 firmly fixed in the appropriate position to prevent it from being affected by vibration, collision or displacement, so as to ensure the normal operation and measurement accuracy of the current transformer; the unique design of the clamp seat 9 makes the clamp 901 easily pass through the bar hole and fix the device on the equipment. This design makes the installation process simpler and faster, and reduces the installation time. Time and labor costs, at the same time, the use of the clamp seat 9 and the clamp 901 can provide a better fixing effect. After the clamp 901 passes through the clamp seat 9, it can effectively prevent the movement and loosening of the device, ensuring the stability and safety of the device; the debugging port set at the bottom of the box body 2 is used for debugging and printing, and the air release valve 12 is mainly used to maintain the gas pressure inside the system within a certain range, ensuring that the pressure in the device is not affected by external changes, and further ensuring the accuracy of the monitoring data; in order to further optimize the monitoring data, a temperature and humidity sensor is set at the bottom of the box body 2 to test the real-time temperature and humidity for data processing, thereby improving the accuracy of the monitoring data.

[0025] Another specific embodiment of the present invention: Visual monitoring device for lightning arresters based on leakage current monitoring, such as Figure 1 , Figures 5 to 9As shown, it includes a shell, a power supply, a display screen 4, an antenna 5, a through-current transformer 7, and a circuit board 8, wherein the shell is composed of a bottom plate 1, a box body 2 and a cover plate 3, a circuit board 8 is arranged in the shell, an antenna 5 is arranged on one side of the shell, and an access power supply is arranged on the other side of the shell, the output end of the power supply is connected to the circuit board 8, and the circuit board 8 is connected to the antenna 5; a through hole is arranged on the box body 2, and a threading tube for inserting a grounding wire is arranged on the through hole, and both ends of the threading tube are sealed and connected to the through hole on the shell, and the through hole The current transformer 7 is sleeved on the threading tube inside the box body 2. The through-current transformer 7 is connected to the bottom plate 1 through a fixing clip 16. The output end of the through-current transformer 7 is connected to the circuit board 8. The cover plate 3 is provided with a display screen 4, and the display screen 4 is electrically connected to the circuit board 8. Waterproof connectors 14 are provided on the through holes on both sides of the box body 2. Mounting ears are provided on both sides of the fixing clip 16, which is fixed to the bottom plate 1 through the mounting ears. A space for accommodating the through-current transformer 7 is provided in the middle of the fixing clip 16. A card is provided on the rear side of the bottom plate 1. The clamp seat 9 is integrally formed, and the two sides of the clamp seat 9 are set as grooves, and the bottom of the grooves is respectively provided with mounting holes. The middle part of the clamp seat 9 is provided with a trapezoidal protrusion, and the two sides of the trapezoidal protrusion are provided with strip holes for the clamp 901 to pass through; the access power supply is DC24V, and the bottom of the box body 2 is provided with two groups of bellows joints 13, a debugging port, and a power switch 10, wherein the DC24V power supply adopts a series power supply mode through a group of bellows joints 13; the display screen 4 is a digital tube; the circuit board 8 includes an MCU control module, a LORA wireless communication module, a current acquisition module, a storage EEPROM module, and a power module; the MCU control module uses the LoRa470MHz wireless frequency band to interact with the LORA wireless communication module through SPI, and the LORA wireless communication module transmits the collected data to the concentrator through wireless transmission; the display screen 4 receives the display control instruction of the MCU control module, and displays the leakage current value of the lightning arrester and the number of lightning strike protection actions in segments; a temperature and humidity sensor is provided at the bottom of the box body 2.

[0026] The structural features of this embodiment are as follows: This embodiment discloses a method for on-site power supply, using DC24V, to realize on-site wireless active visual lightning arrester online monitoring, avoid causing serious faults, and improve maintenance efficiency. The power supply adopts a series power supply mode, enters through a bellows connector 13 as an input port, then passes through the device, and then outputs from another bellows connector 13, and the on-site power supply uses a digital tube as the display screen 4, which consumes power but has a clear display effect.

[0027] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the field without departing from the purpose of the present invention. These changes involve related technologies well known to those skilled in the art, which all fall within the scope of protection of the patent of the present invention.

[0028] Many other changes and modifications may be made without departing from the concept and scope of the present invention.It should be understood that the present invention is not limited to the specific embodiments, and the scope of the present invention is defined by the appended claims.

Claims

1. A visual monitoring device for lightning arresters based on leakage current monitoring, characterized in that: It includes a housing, a power supply, a display screen (4), an antenna (5), a through-hole current transformer (7) and a circuit board (8); The housing comprises a bottom plate (1), a box body (2) and a cover plate (3); a circuit board (8) is arranged inside the housing; an antenna (5) is arranged on one side of the housing; an access power supply is arranged on the other side of the housing; an output end of the access power supply is connected to the circuit board (8); and the circuit board (8) is connected to the antenna (5); The box body (2) is provided with a through hole, the through hole forms an opening on both sides of the box body, a threading tube for passing the arrester grounding wire is provided in the through hole, both ends of the threading tube are sealed and connected to the through hole of the box body, the through-hole current transformer (7) is sleeved on the threading tube inside the box body (2), the through-hole current transformer (7) is connected to the bottom plate (1) via a fixing clip (16), and the output end of the through-hole current transformer (7) is connected to the circuit board (8); A display screen (4) is provided on the cover plate (3), and the display screen (4) is electrically connected to the circuit board (8).

2. The visual monitoring device for lightning arrester based on leakage current monitoring according to claim 1 is characterized in that: Waterproof joints (14) are provided at the openings on both sides of the box body (2).

3. The visual monitoring device for lightning arrester based on leakage current monitoring according to claim 2 is characterized in that: The fixing clip (16) is provided with mounting ears on both sides, and the fixing clip is fixed to the base plate (1) via the mounting ears. A space for accommodating a through-hole current transformer (7) is provided in the middle of the fixing clip (16).

4. The visual monitoring device for lightning arrester based on leakage current monitoring according to any one of claims 1 to 3, characterized in that: A clamp seat (9) is mounted on the surface of the bottom plate (1) away from the cover plate. The clamp seat (9) is integrally formed. Two sides of the clamp seat (9) are provided with grooves. The bottoms of the grooves are provided with mounting holes. A trapezoidal protrusion is provided in the middle of the clamp seat (9). Strip holes for the clamp (901) to pass through are provided on two sides of the trapezoidal protrusion.

5. The visual monitoring device for lightning arrester based on leakage current monitoring according to claim 4 is characterized in that: The access power source is a battery pack, the battery pack comprising a solar panel (6) and a battery (15), the solar panel (6) being arranged on the cover plate (3), the solar panel (6) being electrically connected to the battery (15), the output end of the battery (15) being connected to the circuit board (8), and a debugging port, an air release valve (12) and a power switch (10) being provided at the bottom of the box body (2), the debugging port being a 6-core aviation plug (11).

6. The visual monitoring device for lightning arrester based on leakage current monitoring according to claim 4, characterized in that: The display screen (4) is an LED screen.

7. The visual monitoring device for lightning arrester based on leakage current monitoring according to claim 4, characterized in that: The access power source is a DC24V external power source, and the bottom of the box body (2) is provided with two groups of bellows connectors (13), a debugging port, and a power switch (10), wherein the DC24V external power source is connected in series to supply power via the two groups of bellows connectors (13).

8. The visual monitoring device for lightning arrester based on leakage current monitoring according to claim 4, characterized in that: The display screen (4) is a digital tube.

9. The visual monitoring device for lightning arrester based on leakage current monitoring according to claim 4, characterized in that: The circuit board (8) comprises an MCU control module, a LORA wireless communication module, a current acquisition module, an EEPROM module, and a power supply module; The MCU control module uses the LoRa470MHz wireless frequency band to interact with the LORA wireless communication module through SPI, and the LORA wireless communication module transmits the collected data to an external concentrator through wireless transmission; The display screen (4) receives display control instructions from the MCU control module, and displays the arrester leakage current value and the number of lightning strike protection actions in segments.

10. The visual monitoring device for lightning arrester based on leakage current monitoring according to claim 4, characterized in that: A temperature and humidity sensor is provided at the bottom of the box body (2).

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