Gas dynamics of the pulsed electric arc in the transversal magnetic field

Moralev, I. A.; Kazanskii, P N; Bityurin, V. A.; Bocharov, A. N.; Firsov, Alexander A.; Dolgov, Eugenii; Leonov, Sergey B.

doi:10.1088/1361-6463/ab9d5a

Cited by 25 publications

(12 citation statements)

References 43 publications

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“…In other words, the selfinduced magnetic field may have a negative influence on the sub-arc splitting. The corresponding technique identified is the externally applied transversal magnetic field [34], which is expected to compensate the self-induced magnetic field with reversed direction on two sides of the steel plates. Such external magnetic field can be applied by the coils connected to the concerned circuit with the circuit breaker installed as shown in Figure 3b.…”

Section: Challengesmentioning

confidence: 99%

Rapid and Safe Arc Quench by Using External Magnetic Coil in Power Interruption

Wang¹,

Liang²,

Zhou³

2022

AJST

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Low-voltage arc quench is one of the most processes for a successful power interruption in circuit breakers. Typical circuit breakers are designed to switch off the fault current within half a cycle, less than 10 milliseconds, which requires an efficient arc quench and thus poses great challenges in power interruption. Apart from using power electronics, which is very expensive and of low capacity, the classical circuit breakers that uses a stack of steel plates to split the fault-current arc into many sub-arcs are still dominant for both industry and residential installations. Due to the high current, the self-induced magnetic field will drive the arc towards to the steel plates and force the arc being spitted into many sub-arcs, from which the arc-steel plate interfaces generates multiple voltage drops. Once the sum of all voltage drops increases and exceeds the source voltage, the arc will extinguish and quench. Due to the ferromagnetic effect, the magnetic field increases dramatically during arc splitting by steel plates. However, the self-induced magnetic field have reversed direction on both sides of the steel plates which pushes the sub-arcs to opposite directions and prevents concurrent and even arc splitting. In this report, we report a new technique to compensate the self-induced the magnetic field by using a background magnetic coil, thus, to give an even and simultaneous arc splitting and guarantee the power interruption.

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Section: Challengesmentioning

confidence: 99%

Rapid and Safe Arc Quench by Using External Magnetic Coil in Power Interruption

Wang¹,

Liang²,

Zhou³

2022

AJST

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“…Some techniques like imposing a gas flow [69] or using an ablative material to interact with the arc are proposed to expedite the power interruption. From this study, another approach identified is the externally applied transversal magnetic field [70,71], which is expected to compensate the self-induced magnetic field with reversed direction on two sides of the steel plates, which will be further investigated in the future.…”

Section: Driving Force For Arc Splittingmentioning

confidence: 99%

3D computational study of arc splitting during power interruption: the influence of metal vapor enhanced radiation on arc dynamics

Huo¹,

Wang²,

Cao³

2020

J. Phys. D: Appl. Phys.

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Arc splitting is one of the most important processes in accomplishing a power interruption by multiplying the number of voltage drops. During arc-plate interaction, the arc roots erode and vaporize the metals which significantly alters the gas composition and plasma properties, such as the radiation absorption coefficient. In this work, we perform a 3D computational study of arc splitting in a circuit breaker. In order for the study to be systematic, the metal vaporization, species transport, and radiative heat transfer are integrated into the magnetohydrodynamics modeling with some special considerations. Firstly, the simulation considers the ferromagnetic effect of steel plates. Secondly, the metal-vapor-enhanced radiation is numerically implemented by the discrete ordinate method with consideration given to the banded radiation spectrum. Thirdly, the simulation model incorporates a near-electrode layer to implement the voltage drop and imposes additional heat flux on the arc spots. The simulation results show that the metal vaporization not only influences the arc dynamics (via Stefan flow) but also enhances the local radiation intensity. Besides, due to the ferromagnetic effect, the magnetic field increases dramatically during arc splitting. However, the self-induced magnetic force has quite a different influence on the motion of sub-arcs, which prevents even and concurrent arc splitting. This simulation reveals that the magnetic-field-induced uneven splitting can be compensated by the enhanced pressure wave or externally applied transversal magnetic field. This study is expected to explore more applications in simulating arc interruption and improve the design of highly-efficient circuit breakers.

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“…Thus, the amplitude of the predominant tone decreases by 10 dB. The velocity field was investigated by using the LaVision FlowMaster PIV system described in detail in [16]. The resulting velocity field was obtained by averaging over 400 instantaneous frames.…”

mentioning

confidence: 99%

Flow visualization in cavity with dielectric barrier discharge actuator control

Kazanskii

Selivonin

Moralev

2022

Technical Physics Letters

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The results of hydrodynamic pressure fluctuations control by means of a dielectric barrier discharge plasma actuator in a rectangular cavity with sharp edges are presented. The study was carried out at the free flow velocity V=37 m/s. The discharge was organized near the leading edge of the cavity. The average energy of the discharge pulse was 0.03 J, its duration was 1 ms, and frequency modulation was implemented at the natural cavity resonant frequencies of 500, 817, 1317 Hz and at a high frequency of 2160 Hz which did not correspond to the natural resonant pressure peak. Pressure pulsations were measured with a Kulite pressure transducer. It is established that the discharge regime affects the pressure fluctuations in the cavity. The pressure amplitude at the downstream wall of the cavity can be either increased from 117 dB to 128 dB or decreased to 110 dB if, respectively, if either the dominant or higher modes are pumped by the discharge. The PIV visualization was organized in the phase-locked mode. The pressure spectrum corresponds to the magnitude of coherent structures in the shear layer of the cavity. Keywords: plasma actuator, cavity, active control, DBD, boundary layer, mixing layer, closed loop.

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Gas dynamics of the pulsed electric arc in the transversal magnetic field

Cited by 25 publications

References 43 publications

Rapid and Safe Arc Quench by Using External Magnetic Coil in Power Interruption

Rapid and Safe Arc Quench by Using External Magnetic Coil in Power Interruption

3D computational study of arc splitting during power interruption: the influence of metal vapor enhanced radiation on arc dynamics

Flow visualization in cavity with dielectric barrier discharge actuator control

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