Experimental Study of Magnetic Field Effect on dc Corona Discharge in Low Vacuum

Elabbas, K.

doi:10.1007/s40031-014-0100-5

Cited by 8 publications

(3 citation statements)

References 22 publications

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“…The experimental results reported in this study refer to the impact of a magnetic field on a corona in point-plane setup. The investigation of a magnetic field on DC corona discharges in a low vacuum was shown in Elabbas et al [20] and in an ultrahigh frequency (UHF) band in Bhangaonkar et al [21]. It was demonstrated that the effect of a magnetic field on a discharge current was most significant with negative corona discharges rather than with positive ones, which was due to field coverage on an ionization zone [22].…”

Section: Introductionmentioning

confidence: 99%

“…Previous research has reported on either the qualitative impact of a magnetic field on PDs or the effects occurring at a very high magnetic field [19][20][21][22][23][24][25][26][27][28][29][30][31]. In this article, a rather low magnetic field was applied to investigate the early stages of the magnetic effects that may take place in power cables, motors, or generators or be caused by leakage flux in the insulation of power transformers.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Interplay between Parallel and Perpendicular Magnetic and Electric Fields on Partial Discharges

Florkowski

2023

Energies

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This paper reports on the influence of a magnetic field on the dynamics of partial discharges (PDs) in two distinct configurations with respect to the mutual orientation of electric fields. The broad application areas include electrical insulation systems of both high-voltage grids and industrial network devices as well as emerging segments such as electric vehicles or more electric aircraft. Traditionally, PD measurements are only carried out in an electric field. In all current-carrying power equipment, magnetic fields are also superimposed onto electric ones, thus influencing partial discharge behavior. It has been observed that the interplay between electric and magnetic fields influences the dynamics of PDs; parallel and perpendicular mutual orientations were specifically investigated. The measurement technique allowed us to quantitively detect the effect of magnetic fields on PDs in a corona point–plane arrangement. The novel element presented in this article is a detection of PD intensity modulated by a magnetic field, with both perpendicular and parallel orientations with respect to electric one, and a quantitative visualization in the form of the time-sequence diagrams. The simulation of electron trajectories in the presence of electric and magnetic fields revealed the elongation of the pathways and differentiation of the charged particle propagation times. The perpendicularly oriented magnetic field led to a twisting effect, whereas the parallel alignment reflected the propagation along a helical trajectory. A slightly stronger PD intensity amplification effect was observed in the case of a parallel alignment of electric versus magnetic fields as compared with the perpendicular orientation. The presented results may contribute to PD measurement methodology in both electric and magnetic fields as well as a better understanding of the underlying physical mechanisms. The observed effect of the modulation of the magnetically based PD dynamics may be relevant for the insulation systems of power equipment.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Interplay between Parallel and Perpendicular Magnetic and Electric Fields on Partial Discharges

Florkowski

2023

Energies

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“…It was shown that the power spectral density in the corona is reduced in the UHF band of 650–800 MHz in the presence of a magnetic field (250–300 Gauss), for gaps ranging from 15 to 40 mm. The study of a magnetic field on DC corona discharges in a low vacuum was shown in 3 . It was demonstrated that the effect of a magnetic field on a discharge current was most significant with negative corona discharges rather than with positive ones.…”

Section: Introductionmentioning

confidence: 99%

Magnetic field modulated dynamics of partial discharges in defects of high voltage insulating materials

Florkowski

2022

Sci Rep

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This paper presents original measurement methodology and detection approach to determine the influence of the magnetic field on the partial discharge (PD) dynamics. The application areas refer to insulation systems of both grid and industrial network devices and emerging segments such as high-speed rail, electric vehicles or more electric aircrafts. Conventionally PD measurements are executed only in electric field, however the interaction of magnetic and electric fields influences the dynamics of PDs. The measurement technique allowed to detect quantitatively the effect of magnetic fields on PDs in two representative arrangements: in gaseous void in dielectric material and in corona point-plane setup. Measurements in both configurations have revealed amplification of PDs intensity. The quantitative comparison of PDs evolution in the magnetic field is a novel aspect shown in this paper. Combination of phase resolved images and time-sequence intensity diagrams obtained at magnetic field switching allowed to visualize and determine quantitatively this impact. This effect is attributed to the extension of the charged particle trajectory and the amplification of the electron energy due to acceleration. Thus, the investigated impact of a magnetic field can be perceived as an additional element that influences the PD dynamics.

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Electrohydrodynamic thruster for near-space applications

2021

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Experimental Study of Magnetic Field Effect on dc Corona Discharge in Low Vacuum

Cited by 8 publications

References 22 publications

Effect of Interplay between Parallel and Perpendicular Magnetic and Electric Fields on Partial Discharges

Effect of Interplay between Parallel and Perpendicular Magnetic and Electric Fields on Partial Discharges

Magnetic field modulated dynamics of partial discharges in defects of high voltage insulating materials

Electrohydrodynamic thruster for near-space applications

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