Discharge and breakdown mechanism transition in the conditioning process between plane-plane copper electrodes in vacuum

Li, Shimin; Geng, Yingsan; Wang, Jianhua; Yamano, Yasushi; Okura, Tetsuya; Kyosu, Ryota; Nishiyama, Masashi

doi:10.1109/tdei.2018.007505

Cited by 18 publications

(2 citation statements)

References 10 publications

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“…After analyzing the presented breakdown initiation mechanism, it can be concluded that the increase in the electrical strength of the vacuum insulating system at AC voltage is possible by reducing the field emission electron current in the system. This can be done by preventing the formation of micro-sharpeners on the electrode surfaces, using thin coatings to suppress the field emission of electrons from the electrode surfaces, and performing conditioning processes [26][27][28].…”

Section: Initiation Of An Electrical Discharge In a Vacuum At Ac Voltagementioning

confidence: 99%

Breakdown Initiation and Electrical Strength of a Vacuum Insulating System in the Environment of Selected Noble Gases at AC Voltage

Lech¹,

Węgierek²

2022

Energies

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This paper presents the results of testing the electrical strength of an insulating system in a vacuum obtained from three noble gases: argon, neon, helium, and air. The breakdown voltages were measured for contact gaps of 1 mm and 2 mm. A difference was observed in the pressure range where the electrical strength was kept constant. The chamber filled with helium residual gases lost its insulating properties at the highest pressure among the tested gases (2.00 × 100 Pa at contact gap d = 2 mm), while the chamber filled with argon gas lost its insulating properties at the lowest pressure among the tested gases (2.00 × 10−1 Pa at contact gap d = 2 mm). After a decrease in electrical strength, an intense glow discharge was observed. A theoretical description related to the initiation of an electrical breakdown in vacuum insulating systems is also presented. The situation in which the discharge chamber with a contact system was filled with the mentioned gases was analyzed. The mean free paths of the electrons and molecules as well as the velocities and energies of the electrons accelerated by the voltage applied to electrodes were calculated. The obtained results were related to the measurement parameters and analyzed in terms of the discharge development. The results of the research suggest alternatives for the further development of vacuum-extinguishing chambers used in environmentally-friendly electrical switchgear by increasing the rated operating pressure, maintaining the required electrical strength values, and thus facilitating the operation due to greater certainty in regard tomaintaining the integrity of such a vacuum interrupter.

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Section: Initiation Of An Electrical Discharge In a Vacuum At Ac Voltagementioning

confidence: 99%

Breakdown Initiation and Electrical Strength of a Vacuum Insulating System in the Environment of Selected Noble Gases at AC Voltage

Lech¹,

Węgierek²

2022

Energies

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“…Actually, this is a phenomenon related to electrostatic forces, and it can occur in vacuum conditions as well as in air. Corona discharge can occur under variable air pressures [32][33][34][35], either below the standard atmospheric pressure [36], or even in vacuum conditions [37][38][39][40]. The precursor and trigger of vacuum discharges and breakdowns is the field emission [41].…”

Section: History Of Ionic Windmentioning

confidence: 99%

A review on recent advances and challenges of ionic wind produced by corona discharges with practical applications

Qu¹,

Zeng²,

Zhang³

et al. 2021

J. Phys. D: Appl. Phys.

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Ionic wind, an induced phenomenon during corona discharge, possessing the features of silent operation and no moving parts, has a wide range of applications. Ionic wind generation is accompanied by complex physical processes, involving gas ionization, ion recombination, flow, and various chemical reactions, as well as mutual couplings between some of them. Therefore, understanding the corona discharge process and ionic wind generation is crucial for researchers and engineers to better utilize this phenomenon in practical applications. In this review, the principles of corona discharge and its induced ionic wind are presented. Subsequently, ionic wind generators (IWGs) are discussed according to their applications, and the corresponding advances based on experimental studies and numerical simulations are also reviewed. Moreover, the challenges of transitioning the ionic wind technology from laboratory studies to practical applications are discussed. These challenges include the excessively high onset voltage of the corona, ozone emission, and influence of environmental conditions. Furthermore, the mechanisms of these barriers and several effective approaches for mitigating them are provided. Finally, some future research prospects and the conclusions are presented.

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Simulation of the prebreakdown processes in a cathode microprotrusion with the tip shape varying due to melting

Uimanov,

Shmelev,

Barengolts

2024

Vacuum

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Discharge and breakdown mechanism transition in the conditioning process between plane-plane copper electrodes in vacuum

Cited by 18 publications

References 10 publications

Breakdown Initiation and Electrical Strength of a Vacuum Insulating System in the Environment of Selected Noble Gases at AC Voltage

Breakdown Initiation and Electrical Strength of a Vacuum Insulating System in the Environment of Selected Noble Gases at AC Voltage

A review on recent advances and challenges of ionic wind produced by corona discharges with practical applications

Simulation of the prebreakdown processes in a cathode microprotrusion with the tip shape varying due to melting

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