Method for reducing lightning ground potential of lightning arrester

An air-termination and ground potential technology, applied in circuits, electrical components, corona discharge devices, etc., can solve the problems of high grounding resistance construction cost and unreasonable grounding resistance value technology and economy, so as to reduce construction costs and limit lightning strikes. The effect of overvoltage and lightning current reduction

Pending Publication Date: 2021-09-17
张安斌
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Lightning protection measures are ultimately an economic issue. The smaller the resistance value of the grounding resistance, the higher the construction cost. Especially in the soil area with high resistivity, it is extremely unreasonable in terms of technology and economy to require the grounding body to meet the specified grounding resistance value.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for reducing lightning ground potential of lightning arrester
  • Method for reducing lightning ground potential of lightning arrester
  • Method for reducing lightning ground potential of lightning arrester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] This embodiment is to apply the method of the present invention to reduce the lightning strike ground potential of the lightning receptor to the building. One end of the lightning arresting device is grounded through the metal body in the building, and the other end is connected to the lightning receptor, so that when the lightning receptor is struck by lightning, The potential of the whole building does not exceed the set value, so as to realize the lightning protection of the building and the electrical and electronic equipment in the building; the lightning receptor is a lightning protection belt, a lightning protection line or a lightning rod. In this embodiment, the resistance value of the lightning arresting device is set to 10 kΩ, which can effectively ensure that the protected buildings are not struck by lightning, and fundamentally solve the damage to electronic equipment caused by the rise in ground potential caused by lightning strikes.

Embodiment 2

[0047] In this embodiment, the method for reducing the lightning strike ground potential of the lightning-termination device of the present invention is applied to an overhead line with a lightning protection line, the tower of the overhead line is grounded, and the lightning arresting device is connected between the lightning protection line and the earth. When the lightning protection line is struck by lightning, Make the potential of the grounding part of the tower and the tower body not exceed the set value, eliminate the lightning strike, and the lightning protection line is a lightning receptor. This embodiment can ensure that the potential of the tower ground and the tower does not exceed the set value when lightning strikes, so that the potential of the tower does not exceed the insulation value of the tower and the transmission wire, thereby avoiding the occurrence of lightning strikes; especially for overhead lines in mountainous areas, soil resistance The rate is ver...

Embodiment 3

[0050] This embodiment is to apply the method of the present invention to reduce the lightning strike ground potential of the lightning-termination device to an overhead line without a lightning-protection wire, the tower of the overhead line is grounded, the lightning arresting device is connected between the overhead line and the earth, and the overhead line is used as a lightning-termination device ; When the overhead line is directly struck by lightning, the amplitude of the lightning current is limited to not exceed the set value to limit the overvoltage of the direct lightning strike and protect the overhead line and the tower; when the thundercloud discharge disappears, the charge induced by the overhead line passes through the prisoner lightning The device returns to the earth; set the power frequency impedance of the prison mine device to not less than 10000 ohms.

[0051] The overhead lines without lightning conductors in the prior art are all medium-voltage overhead ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for reducing lightning stroke ground potential of a lightning arrester, which is characterized in that a lightning imprisoning device is connected between the lightning arrester and a ground grounding body, and when a thundercloud approaches the lightning arrester, the lightning imprisoning device transmits charges with polarity opposite to that of the thundercloud to the lightning arrester from the ground to form electrostatic induction of the lightning arrester to the thundercloud. A protected body is prevented from generating electrostatic induction due to thundercloud in a manner of shielding the protected body; when the thundercloud discharges the lightning arrester to form lightning stroke, the lightning imprisoning device is in high impedance to suppress the lightning stroke current amplitude, and the situation that the ground potential of the position where the ground grounding body connected with the lightning imprisoning device is located exceeds a set value is avoided. In the prior art, lightning stroke ground potential rise is always solved in a mode of singly reducing grounding resistance, the invention provides another method for solving the problem, the method is applied to the overhead line to realize lightning protection before and during lightning, and direct lightning, counterattack lightning and inductive lightning hazards of the overhead line can be eliminated from the source.

Description

technical field [0001] The invention relates to a lightning protection method, in particular to a method for reducing the lightning strike ground potential of a lightning receptor. Background technique [0002] For lightning, the lightning damage can be reduced by reducing the grounding resistance. After the lightning damage occurs, it is further required to reduce the grounding resistance. From the perspective of the grounding resistance requirements, the smaller the grounding resistance, the better. Grounding technology is just a protective measure taken to prevent electrical or electronic equipment from being struck by lightning. It is to introduce the lightning strike current generated by lightning into the earth through the lightning rod to protect the building. [0003] In the prior art, lightning receptors include lightning rods, lightning protection belts, lightning conductors, and lightning protection nets that directly receive lightning strikes, and metal roofs and...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H01T19/04H01R4/66
CPCH01T19/04H01R4/66
Inventor 张安斌
Owner 张安斌
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap