A method for preventing lightning strikes continuously for multiple times and a lightning arrester

Abstract

A method for preventing lightning strikes continuously for multiple times, which uses the method of rotating multiple groups of lightning arresters to prevent lightning strikes; when being struck by lightning, when being struck by lightning, the lightning arresters in the first working area and the lightning arresters in the second working area are simultaneously impacted by high voltage. The lightning arresters in the first working area work normally and discharge to the ground; the capacitor connected in parallel with the lightning arresters in the second working area is charged through the first lightning strike. When being struck by the second lightning strike, the lightning arresters in the second working area discharge to the ground; after discharging to the ground, the moving contact support rotates to rotate the working area, and the above process is repeated. By using the lightning protection method and lightning arresters of the present invention, the lightning arresters rotate and are detected during the rotation process, and the lightning arresters that have failed can be cut out in time, and the qualified lightning arresters can be placed in front to receive lightning strikes, which can effectively cope with multiple consecutive lightning strikes and avoid losses caused by reasons such as the failure of lightning arresters during multiple consecutive lightning strikes.

Description

Technical Field

[0001] The present invention relates to the technical field of lightning protection methods, and specifically relates to a method for multiple consecutive lightning strikes protection and a method for on-line screening of lightning arresters. Background Art

[0002] The uniformity of raw materials and components of lightning arresters is poor, mainly due to unstable production processes, including both technical and management factors. Due to the particularity of lightning arrester products, the quality inspection process is destructive and only sampling inspection can be carried out, resulting in certain contingency and ultimately poor uniformity of lightning arrester products.

[0003] With the progress of research means and technical equipment, it is currently found that most lightning strike phenomena are multiple consecutive lightning strikes within a short period of time, with short intervals and high frequencies. After the first lightning strike and ground discharge, the lightning protection effect of lightning arresters on subsequent lightning strikes is very poor. Due to the large difference between the design standards followed by lightning arresters in China and the actual lightning strike phenomena, combined with the poor uniformity of lightning arrester product quality, the lightning protection effect is not obvious. Summary of the Invention

[0004] In view of the above technical problems, the present invention provides a method for multiple consecutive lightning strikes protection and a method for on-line screening of lightning arresters. The specific technical solutions are as follows:

[0005] A method for multiple consecutive lightning strikes protection uses a method of rotating multiple groups of lightning arresters for lightning protection; multiple groups of lightning arresters are arranged on a moving contact support, and each lightning arrester serves as a working area; a static contact support is arranged on the lightning arrester, the static contact support straddles two adjacent working areas, and a capacitor is connected in parallel on one of the working areas; the moving contact support can rotate relative to the static contact support to rotate the working areas;

[0006] When being struck by lightning, the lightning arresters in the first working area and the second working area are simultaneously subjected to a high-voltage impact. The lightning arrester in the first working area works normally and discharges to the ground; the capacitor connected in parallel with the lightning arrester in the second working area is charged through the first lightning strike. When being struck by the second lightning strike, the lightning arrester in the second working area discharges to the ground;

[0007] After the ground discharge, the moving contact support rotates to rotate the working areas and repeats the above process.

[0008] Preferably, it further includes lightning arrester detection and screening;

[0009] The detection method is as follows: it is qualified if the temperature of the lightning arrester drops below 60 degrees Celsius within 1 minute after the lightning strike, it is qualified if it can form a ground discharge during the lightning strike, and it is qualified if it is open-circuited to the ground without lightning strike; if all three indicators are qualified, it is judged as intact, and if one of them is unqualified, it is judged as faulty. The unqualified lightning arresters detected are cut out and not rotated.

[0010] Preferably, it also includes arrester detection and screening;

[0011] The detection method is as follows: use a comprehensive arrester characteristic tester to detect the arrester, and cut out the arresters that fail the detection without rotation.

[0012] A multiple consecutive lightning strike arrester includes a static contact bracket and a moving contact bracket. The static contact bracket is connected to a lightning lead wire. Multiple groups of arresters are arranged on the moving contact bracket. Each arrester serves as a working area. The static contact bracket straddles two adjacent working areas;

[0013] A grounding wire is arranged below the moving contact bracket. A lightning sensor is arranged on the grounding wire. A gear is arranged on the moving contact bracket. The gear is connected to a motor;

[0014] The static contact bracket is divided into a first area and a second area. Static contacts are arranged on the static contact bracket. Arrester wires are arranged on the static contacts. Capacitor wires are also arranged on the second area. One end of the capacitor wire is connected to the static contact on the second area, and the other end is connected to a capacitor.

[0015] Preferably, a temperature sensor is arranged on the arrester.

[0016] Preferably, the arrester is connected to a comprehensive arrester characteristic tester.

[0017] The principle of this lightning protection method is as follows: when a lightning strike is received, the first group of main arresters and the second group of standby arresters (i.e., the arresters in parallel with the capacitor) will simultaneously receive a high-voltage impact. Since the second group of standby arresters is connected in parallel with a capacitor and the capacitor has a charging process, the voltage at the capacitor terminal will not change significantly. The first lightning strike is not sufficient to cause the second group of standby arresters to discharge. When there are consecutive lightning strikes, the capacitor of the second group of standby arresters is fully charged after the first lightning strike, the working conditions are formed, and it discharges to the ground. After the capacitor discharges, the terminal voltage is reset to zero.

[0018] By using the lightning protection method and arrester of the present invention, the arresters are rotated and detected during the rotation process. The failed arresters can be cut out in time, and the qualified arresters can be placed in front to receive lightning strikes, which can effectively cope with multiple consecutive lightning strikes and avoid losses caused by the failure of arresters during multiple lightning strikes. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the arrester of the present invention;

[0020] Figure 2 It is a schematic structural diagram of the static contact bracket of the present invention;

[0021] Figure 3 It is a schematic structural diagram of the moving contact bracket of the present invention;

[0022] Figure 4 This is a working diagram of the arrester of the present invention;

[0023] In the figure, 1-lightning conductor, 2-lightning arrester, 3-temperature sensor, 4-static contact bracket, 5-moving contact bracket, 6-lightning sensor, 7-motor, 8-gear, 9-grounding wire; 401-static contact, 402-lightning arrester wire, 403-capacitor wire, 404-first zone, 405-second zone, 501-moving contact, 502-first working zone, 503-second working zone, 504-third working zone, 505-area identification, 506-touch switch. DETAILED DESCRIPTION Example 1

[0024] like Figures 1 to 3 As shown, a multiple lightning strike arrester includes a static contact bracket 4 and a dynamic contact bracket 5. The static contact bracket 4 is connected to the lightning conductor 1. Three lightning arresters 2 are provided on the dynamic contact bracket 5. Each lightning arrester 2 serves as a working area. The dynamic contact bracket 5 is divided into a first working area 502, a second working area 503 and a third working area 504. Each working area corresponds to a lightning arrester 2. A grounding wire 9 is provided below the dynamic contact bracket 5. A lightning sensor 6 is provided on the grounding wire 9. A gear 8 is provided on the dynamic contact bracket 5. The gear 8 is connected to a motor 7 and can be driven to rotate by the motor 7.

[0025] A static contact 401 is provided on the static contact bracket 4. The static contact bracket 4 spans two adjacent working areas on the dynamic contact bracket 5. The static contact bracket 4 is divided into a first area 404 and a second area 405. The first area 404 is provided with a static contact 401, and the second area 405 is provided with two static contacts 401. The static contacts 401 are provided with a lightning arrester wire 402. One of the static contacts 401 in the second area 405 is also provided with a capacitor wire 403, and the capacitor wire 403 is connected to a capacitor.

[0026] Each working area on the dynamic touch bracket 5 is provided with an area identification 506 , and a touch switch 506 is also provided on the outside of the dynamic touch bracket 5 .

[0027] like Figure 4 As shown, the working process of the device is as follows: the device performs self-test after power is turned on. When the lightning sensor 6 outputs a valid signal and the device is struck by lightning, the motor 7 rotates the dynamic contact bracket 5, and the first group of lightning arresters 2 that originally took on the main lightning protection are cut out for inspection. The original second group of lightning arresters 2 become the main lightning arresters, and the third group of lightning arresters 2 become the backup lightning arresters with capacitors.

[0028] If the lightning arrester 2 is intact and the lightning strikes continue, the above actions will be cycled. If the lightning arrester 2 in the first working area 502 fails, the moving contact support 5 will rotate clockwise to cut the failed lightning arrester into the area to be inspected in the third zone. If the lightning arrester 2 in the second working area 503 fails, the moving contact support 5 will rotate counterclockwise to cut the failed lightning arrester into the area to be inspected in the third zone. If the lightning arrester in the third working area 504 fails, the moving contact support will not rotate.

[0029] The touch switch 506 and the area identification 506 cooperate to identify and determine the rotation of the moving contact support 5, ensuring accurate rotation and switching. Its principle is to use digital signals to determine the area position and then define the area serial numbers in the corresponding management system.

[0030] A temperature sensor 3 is provided on the lightning arrester 2. The temperature sensor 3 and the lightning sensor 6 cooperate to detect the lightning arrester 2.

[0031] The detection standard for the lightning arrester 2 is that it is qualified if the temperature drops below 60 degrees Celsius within 1 minute after a lightning strike, it is qualified if it can form a ground discharge during a lightning strike, and it is qualified if it is open-circuited to the ground without a lightning strike. If all three indicators are fully qualified, it is determined to be intact; if one of them is unqualified, it is determined to be faulty.

[0032] The selection and setting of the temperature sensor are all prior arts in this field and will not be described here. Embodiment 2

[0033] As Figures 1 to 3 shown, a lightning arrester for multiple lightning strikes includes a static contact support 4 and a moving contact support 5. The static contact support 4 is connected to the lightning lead 1. Three lightning arresters 2 are provided on the moving contact support 5. Each lightning arrester 2 serves as a working area, dividing the moving contact support 5 into a first working area 502, a second working area 503, and a third working area 504. Each working area corresponds to a lightning arrester 2. A grounding wire 9 is provided below the moving contact support 5, and a lightning sensor 6 is provided on the grounding wire 9. A gear 8 is provided on the moving contact support 5, and the gear 8 is connected to the motor 7 and can be rotated by the motor 7;

[0034] A static contact 401 is provided on the static contact support 4. The static contact support 4 straddles two adjacent working areas on the moving contact support 5. The static contact support 4 is divided into a first area 404 and a second area 405. One static contact 401 is provided on the first area 404, and two static contacts 401 are provided on the second area 405. A lightning arrester wire 402 is provided on the static contact 401, and a capacitor wire 403 is also provided on one of the static contacts 401 on the second area 405. The capacitor wire 403 is connected to a capacitor;

[0035] An area identification 506 is provided in each working area on the moving contact support 5, and a touch switch 506 is also provided outside the moving contact support 5.

[0036] AsFigure 4 As shown in Figure 4 , the working process of the device is as follows: After the device is powered on, it performs self-check. When the lightning sensor 6 outputs a valid signal and the device is struck by lightning, the motor 7 rotates the moving contact support 5, cutting out the first group of lightning arresters 2 that originally assumed the main lightning protection for inspection. The original second group of lightning arresters 2 becomes the main lightning arrester, and the third group of lightning arresters 2 becomes the standby lightning arrester with capacitance.

[0037] If the lightning arrester 2 is intact and the lightning strike continues, the above actions will be cycled. If the lightning arrester 2 in the first working area 502 fails, the moving contact support 5 rotates clockwise to cut the failed lightning arrester into the third area for inspection. If the lightning arrester 2 in the second working area 503 fails, the moving contact support 5 rotates counterclockwise to cut the failed lightning arrester into the third area for inspection. If the lightning arrester in the third working area 504 fails, the moving contact support will not rotate.

[0038] The touch switch 506 and the area recognition 506 cooperate to identify and determine the rotation of the moving contact support 5, ensuring accurate rotation and switching. Its principle is to use digital signal to determine the area position, and then define the area serial number in the corresponding management system.

[0039] In this embodiment, the lightning arrester 2 is detected by a comprehensive lightning arrester tester to detect the state and integrity of the live lightning arrester.

Claims

1. A method for preventing lightning strikes continuously for multiple times, characterized in that Lightning protection is carried out by rotating multiple groups of lightning arresters; multiple groups of lightning arresters are arranged on the moving contact support, and each lightning arrester serves as a working area; a static contact support is arranged on the lightning arrester, the static contact support straddles two adjacent working areas, and a capacitor is connected in parallel on one of the working areas; the moving contact support can rotate relative to the static contact support to rotate the working areas. When being struck by lightning, the lightning arresters in the first working area and the second working area are simultaneously impacted by high voltage. The lightning arrester in the first working area works normally and discharges to the ground; the capacitor connected in parallel with the lightning arrester in the second working area is charged through the first lightning strike, and when being struck by the second lightning strike, the lightning arrester in the second working area discharges to the ground. After discharging to the ground, the moving contact support rotates to rotate the working areas and repeats the above process.

2. The method for preventing lightning strikes continuously for multiple times according to claim 1, characterized in that, It also includes lightning arrester detection and screening. The detection method is as follows: it is qualified if the temperature of the lightning arrester drops below 60 degrees Celsius within 1 minute after being struck by lightning, it is qualified if it can form a discharge to the ground during lightning strike, and it is qualified if it is open-circuited to the ground without lightning strike; if all three indicators are qualified, it is judged to be in good condition, and if one of them is unqualified, it is judged to be faulty, and the unqualified lightning arrester is cut out and not rotated.

3. A method for lightning protection against multiple consecutive lightning strikes according to claim 1, characterized in that, It also includes lightning arrester detection and screening. The detection method is as follows: a lightning arrester comprehensive characteristic tester is used to detect the lightning arrester, and the unqualified lightning arrester is cut out and not rotated.

4. A multiple consecutive lightning strike arrester, characterized in that, It includes a static contact support and a moving contact support. The static contact support is connected to the lightning-leading wire, and multiple groups of lightning arresters are arranged on the moving contact support. Each lightning arrester serves as a working area, and the static contact support straddles two adjacent working areas. A grounding wire is arranged below the moving contact support, a lightning sensor is arranged on the grounding wire, and a gear is arranged on the moving contact support. The gear is connected to the motor. The static contact support is divided into a first area and a second area. Static contacts are arranged on the static contact support, lightning arrester wires are arranged on the static contacts, and a capacitor wire is also arranged on the second area. One end of the capacitor wire is connected to the static contact on the second area, and the other end is connected to the capacitor. A temperature sensor is arranged on the lightning arrester. The lightning arrester is connected to the lightning arrester comprehensive characteristic tester.

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