Gas-blast arc extinction lightning protection gap for power equipment

Abstract

The invention relates to a lightning protection device for power equipment, in particular to a gas-blast arc extinction lightning protection gap for the power equipment of various voltage classes. The gas-blast arc extinction lightning protection gap for the power equipment comprises parts such as a high-pressure side connecting body, a grounding connecting body, a gas generator, a signal detection unit, a high-voltage electrode, a grounding electrode and the like, wherein the gas generator is arranged nearby the high-voltage electrode or the grounding electrode; the signal detection unit generates a trigger signal after lightning current passes through the signal detection unit; the gas generator is started so as to generate airflow sufficient to blow an electric arc out; in the gas generator, compressed gas is packaged by gas pellets which are packaged by gas bombs; a plurality of gas bombs are sequentially arranged and packaged in the gas generator; and actuated gas bomb frameworks are replaced by unactuated gas bombs automatically, and the action times of the gas generator are determined by the number of the gas bombs. In the lightning protection device, the electric arc can be rapidly blown out, the reclosing success rate is improved and the lightning protection reliability of the power equipment is improved.

Description

technical field [0001] The invention relates to a lightning protection device, in particular to a gas blowing arc extinguishing lightning protection gap suitable for power equipment of various voltage levels. Background technique [0002] In order to avoid damage to the insulation of power equipment caused by lightning strikes or flashovers caused by induction lightning, current power production departments generally use lightning protection gaps or various lightning arresters to protect power equipment. [0003] 1 guard gap [0004] When the power equipment is subjected to lightning overvoltage impact, the protection gap is first broken down due to the overvoltage, and a large amount of lightning current is leaked into the ground, which greatly reduces the overvoltage amplitude of the power equipment, thereby protecting the power equipment. Because the protection gap has no arc extinguishing ability, it cannot cut off the power frequency continuous current caused by short ...

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the disadvantages of the existing lightning protection means, such as the short service life of ordinary lightning protection gaps and ordinary line arresters, frequent maintenance and replacement, and high operating costs, the invention provides a new type of lightning protection gap, which can not only be ahead of the insulator Breakdown, and has the function of gas blowing arc extinguishing

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