Investigation of effectiveness of gas flow action on arc discharge initiated in contact breaking

In order to reduce the lightning trip-out rate of grid power lines, a kind of impulse quenching based multichamber arc quenching structure (IQBMAS) is developed by the authors. This kind of MAS can attract the lightning impulse arc into its arc quenching channel and truncate the impulse arc into multiple parts rapidly. In this case, the impulse arc will not develop into steady power frequency current, so the lightning trip-out can be avoided. In this paper, simulations and experiments are conducted to verify the arc-quenching effect of IQBMAS on the basis of expounding the operating principle of IQBMAS, establishing the arc model in the channel as well as deriving the relevant numerical equations. The test result shows that IQBMAS can extinguish the power frequency arc of 10 kV lines within 1.5 ms with no reignition.

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Study on impulse quenching based multichamber arc quenching structure

Wang

Zhou

et al. 2019

AIP Advances

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Mechanism for truncating power-frequency continuation and reburning by means of a super-strong arc-extinguishing gas

et al. 2021

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The process of arc suppression with a super-strong arc-extinguishing gas (AEG) includes arc truncation and reburning suppression. In this paper, the plasma mechanics, the mechanics of the super-strong AEG, and the arc-reburning suppression by the AEG are all modeled. Combined with test data, the characteristics of arc truncation, pressure characteristics, and time characteristics of the AEG are analyzed, and the law of medium recovery and reignition suppression of arc fracture under the action of the super-strong AEG are discussed. The test results show that with a super-strong AEG, the arc-extinguishing threshold and time are 40 kA and less than 0.5 ms, respectively.

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Mechanism and experimental study of arc suppression by polyphase longitudinal airflow

Zhou

Feng

et al. 2021

AIP Advances

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An arc extinguishing lightning protection device with a multi-arc extinguishing chamber structure has been gradually applied to the overhead line lightning protection, but the process and key factors of the arc building of the internal multi-phase flow suppression arc still need to be studied. In this paper, based on the theory of arc magnetohydrodynamics and Euler’s high velocity flow field model, a simplified model of arc coupled polyphase longitudinal air flow in a multi-pipe structure is established, the approximate solution of the model is made, and the development process of polyphase air flow and the extinction mechanism of the arc are obtained. At the same time, the arc quenching process of polyphase longitudinal air flow is also studied experimentally. The experimental results show that the continuous arc of power frequency can be stopped quickly and will not be reignited under the condition of polyphase air flow.

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Investigation of effectiveness of gas flow action on arc discharge initiated in contact breaking

Cited by 4 publications

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Study on impulse quenching based multichamber arc quenching structure

Study on impulse quenching based multichamber arc quenching structure

Mechanism for truncating power-frequency continuation and reburning by means of a super-strong arc-extinguishing gas

Mechanism and experimental study of arc suppression by polyphase longitudinal airflow

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