Study on impulse quenching based multichamber arc quenching structure

Li, Zijian; Wang, Jufeng; Zhou, Xin; Huang, Shangshi; Xia, Zhijian

doi:10.1063/1.5113853

Cited by 11 publications

(1 citation statement)

References 12 publications

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“…For special electric loads such as motor groups and computing cluster control loads, the restart time of lightning tripping is up to tens of hours. The uncontrolled quantities in the restart process cause serious consequences [11]. The problem of a high lightning tripping rate become a great challenge.…”

Section: Introductionmentioning

confidence: 99%

Electric Arc Recoil–A Novel Method for Reducing Lightning Strike Potential Difference for Transmission Line

et al. 2021

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Increasing arc pressure by tens of times with fine pouring tube, a positive shock wave by the pouring arc entering the closed space of the thin tube (electric arc recoil wave). The pressure of electric arc recoil wave is 8 to 23 times than that of the arc tube pouring wave. Since the recoil wave has more pressure than the arc tube pouring wave, and their directions are opposite, the tube poring arc is driven away from the tube channel by the recoil wave. The arc completely emptying and a large scale truncation to the electric arc are formed. Therefore, the truncation arc interrupts the lightning current, and recombusts to form a new tube pouring wave and backwash wave. The arc truncation and recombustion are caused by arc tube pouring and electric arc recoil alternately, and forming the intermittent lightning discharge, a large decrease in the amplitude of lightning current, steepness and discharge time. The results show that the amplitude of lightning current can reduce from 67.14 kA to 35.1 kA, and the lightning current steepness can decrease 77.3%. This attenuation method of lightning current amplitude could significantly reduce the lightning current flowing into the ground, the induced overvoltage and the ohm potential difference. Additionally, the problem of lightning strike step voltage in high soil specific resistivity areas and electromagnetic induced overvoltage can be solved by the method in this paper. The probability of original fault is reduced, and the operation reliability is enhanced. The method can lower the cost of ground network and improve the lightning protection performance.INDEX TERMS Electric arc recoil, arc fine tube pouring, grounding, lightning current, lightning protection.

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Section: Introductionmentioning

confidence: 99%

Electric Arc Recoil–A Novel Method for Reducing Lightning Strike Potential Difference for Transmission Line

et al. 2021

Self Cite

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Influence of an explosion air shock wave on arc quenching inside a cylinder

Huang

Wang

et al. 2020

AIP Advances

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To avoid the restriction of the arc energy on the energy quenching of an arc and rapidly quench the arc to restore the insulation characteristics of the gas, the process of arc quenching by an explosion air shock wave is studied in this paper. The interaction between an explosion air shock wave and an arc is considered inside a cylinder structure so that concentrated pressure and airflow velocity can be produced. First, a coupling model of the explosion air shock wave and arc is developed theoretically. Second, according to the model, the explosion air shock wave and arc are simulated by finite element simulation software. It is found that the interaction between the explosion air shock wave and arc is most intense at 0.04 ms, the arc is driven out of the cylinder at 0.087 ms, and then, the arc is gradually quenched. Finally, the test results show that the arc is completely quenched at approximately 0.80 ms, and the value of the peak current is 1 kA. Although there is error between the simulation and test results, the effectiveness of the explosion air shock wave in quenching the arc is still verified, and the arc is quenched over a time scale of milliseconds.

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The effect of a multi-fracture compression airflow arc-extinguishing structure interrupting the power frequency follow current

Huang

Wang

et al. 2020

AIP Advances

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To reduce the damage from the power frequency follow current of distribution lines, a multi-fracture compression airflow arc-extinguishing structure is studied. The structure is mainly composed of a compression tube, a metal electrode, and metal connection fittings, and the multi-fracture compression airflow arc-extinguishing body is formed by the combination of packaging and insulation fittings. The body and the air gap are parallel to both ends of the insulator. When lightning strikes, the internal short gap of the main body and the air gap break down, and the lightning arc enters the arc-extinguishing body through the breakdown channel. In the structure, the arc is compressed by force to form internal and external gradients of temperature and to produce jet airflow. The jet airflow acts on the subsequent power frequency follow current arc, which is suppressed and extinguished. In this paper, a model coupling an arc and a compressed jet airflow in a multi-fracture compression airflow arc-extinguishing structure is established theoretically and simulated by simulation software. Finally, a power frequency follow current interruption test is carried out. The simulation results show that a high-speed airflow of 600 m/s is formed around the fracture at approximately 0.99 ms, and the airflow is proportional to the rate of temperature variation. The test results show that the power frequency follow current of 1.289 kA is cut off within approximately 3 ms without a reburning phenomenon. The effect of power frequency follow current interruption is obvious in the structure.

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Study on impulse quenching based multichamber arc quenching structure

Cited by 11 publications

References 12 publications

Electric Arc Recoil–A Novel Method for Reducing Lightning Strike Potential Difference for Transmission Line

Electric Arc Recoil–A Novel Method for Reducing Lightning Strike Potential Difference for Transmission Line

Influence of an explosion air shock wave on arc quenching inside a cylinder

The effect of a multi-fracture compression airflow arc-extinguishing structure interrupting the power frequency follow current

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