Liquid recoil arc extinguishing and lightning protection method

Abstract

The invention discloses a liquid recoil arc extinguishing and lightning protection method, and belongs to the technical field of arc extinguishing and lightning protection. The method comprises the following steps: placing a liquid in a recoil pipe, when an electric arc enters the recoil pipe, at the moment when the electric arc pre-breaks down the liquid, generating a liquid-electric detonation effect due to that the lightning arc impact time is extremely short and the liquid cannot instantly deform and displace, enabling the peak value of the recoil arc extinguishing pressure to be synchronous with the pre-breakdown time of an impact steepness arc, immediately cutting off the impact arc when being formed, after the arc conducts liquid, enabling the arc and the liquid to exchange heat to generate an electro-hydraulic heat exchange effect, enabling liquid bubbles generated by arc heat and a heat evaporation effect to store kinetic energy, releasing the arc extinguishing pressure, and reflecting back downward shock waves generated by the electro-hydraulic detonation effect and the electro-hydraulic heat exchange effect back by the bottom of the recoil pipe to form shock wave regular reflection effect arc extinguishing. The arc is cut off early, the recoil arc extinguishing pressure peak value is synchronous with the impact large-gradient arc pre-breakdown time, the impact arc is cut off immediately when the impact arc is just formed, and the pressure of the cut-off arc is huge.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a liquid recoil arc extinguishing and lightning protection method. Background technique [0002] Lightning strikes will bring different forms of damage and destruction to power facilities, and thundercloud discharge will cause lightning strike overvoltage in the power system. Lightning overvoltage may cause damage to insulators and transmission lines; the impact flashover caused by lightning strikes on transmission lines will cause flashover of line insulators, and then generate a large power frequency continuous current, damage insulator strings and fittings, and cause line accidents; Electric shock on the transmission line or lightning protection line may cause broken strands or even rupture, making the power transmission work impossible. [0003] The gas recoil arc extinguishing device can effectively reduce the lightning current and make the volt-second characteristic of...

AI Technical Summary

Problems solved by technology

Lightning overvoltage may cause damage to insulators and transmission lines; the impact flashover caused by lightning strikes on transmission lines will cause flashover of line insulators, and then generate a large power frequency continuous current, damage insulator strings and fittings, and cause line accidents; Electric shock on the transmission line or lightning protection line may cause broken strands or even rupture, making the power transmission work impossible

[0003]The gas recoil arc extinguishing device can effectively reduce the lightning current and make the volt-second characteristic of the active arc extinguishing parallel gap more flat, but the existing gas recoil The recoil pressure of the arc extinguishing device is low, which can only reduce the steepness of the wave head of the lightning current, and cannot further attenuate the amplitude of the lightning current. The attenuation rate of the lightning current is low, and the arc current interception capability is not large enough.

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