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 grid economy, safety, and stable operation, expensive line arresters, high use and maintenance costs, and improve the reliability of power supply , simple structure and less maintenance
CN102486954BInactive Publication Date: 2013-08-07GUANGXI POWER GRID CO LTD NANNING POWER SUPPLY BUREAU
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GUANGXI POWER GRID CO LTD NANNING POWER SUPPLY BUREAU
Publication Date
2013-08-07
Estimated Expiration
Not applicable · inactive patent

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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.
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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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