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Multi-interspace self-expanding strong-airflow arc extinguishing lightning protection device

A lightning protection and multi-gap technology, applied to electrical components, insulators, circuits, etc., can solve the problems of unfavorable power grid economy, safety, stable operation, expensive line arresters, high use and maintenance costs, and improve the reliability of power supply , simple structure and less maintenance

Inactive Publication Date: 2012-06-06
GUANGXI POWER GRID CO LTD NANNING POWER SUPPLY BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Secondly, line arresters are expensive, use and maintenance costs are high, leakage current is large, service life is short, and replacements are frequent, and the zinc oxide module used in line arresters is prone to explosion due to the obvious skin effect under lightning impact, resulting in long-term maintenance of the line. Faults are not conducive to the economical, safe and stable operation of the power grid

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Embodiment Construction

[0011] The implementation of the multi-gap self-expanding strong flow arc extinguishing lightning protection device of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0012] see figure 1 , this multi-gap self-expanding strong gas flow arc extinguishing and lightning protection device includes a grounding side electrode connector (1), a signal acquisition device (3), a gas generating device (4), a strong magnet fixing device (5), a grounding side electrode (6), Auxiliary discharge protection gap (8) of multi-gap structure, lead side electrode (9), lead side electrode connecting body (11), the whole device passes through lead side connecting body (11), grounding side connecting body (1) Suspended together in parallel with the insulator string (12). One end of the wire connecting body (11) connected to the main discharge protection gap for connecting the insulator connecting plate (10) and forming a reliable connection wit...

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Abstract

The invention relates to a lightning protection device and especially relates to a multi-interspace self-expanding strong-airflow arc extinguishing lightning protection device used in power transmission lines with different voltage grades. The device is installed in parallel on one side of a line insulator substring. Insulation strength of a main discharge protection gap and an auxiliary discharge gap is less than the insulation strength of the protected insulator substring so that an overvoltage generated when lightning stroke is generated on the line punctures the protection gap preferentially. When the protection gap is punctured so as to discharge, high temperature arc is generated in the auxiliary discharge gap, air is rapidly heated and expanded in a semi-closed space of the auxiliary discharge gap so that the arc is elongated and is erupted along a gas guidance hole. Simultaneously, a signal acquisition device automatically collects signals and starts a gas generation apparatusso as to instantly generate high speed airflow to extinguish the arc. The protection device of the invention has a simple structure. Installation is convenient. When the lightning stroke is generatedon the line, the lightning current can be rapidly leaked to the ground and simultaneously the high speed airflow is generated to extinguish the arc. Therefore, electric power equipment can be effectively protected and power supply reliability can be increased.

Description

technical field [0001] The invention relates to a lightning protection device, in particular to a multi-gap self-expanding strong airflow arc extinguishing lightning protection device for power transmission lines of various voltage levels. Background technique [0002] Lightning protection of transmission lines has always been an important part of the lightning protection work of the power sector, and lightning faults are still one of the important factors affecting the safety of the power grid. The impact flashover caused by lightning strike on the transmission line will cause the line insulator to flash over, and then generate a large power frequency continuous current, damage the insulator string and fittings, and cause a line accident. The traditional "blocking" lightning protection method cannot fundamentally solve the lightning strike problem due to its limitations. Therefore, the power sector generally adopts the installation of parallel protection gaps or line arres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B17/46H01B17/48
Inventor 王巨丰王嬿蕾
Owner GUANGXI POWER GRID CO LTD NANNING POWER SUPPLY BUREAU
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