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

Wang, Yanlei; Huang, Pengcheng; Luo, Yaojing; Chen, Yuning; Wang, Jufeng

doi:10.1063/5.0034735

Cited by 2 publications

(2 citation statements)

References 26 publications

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“…where Cp is the current-control coefficient. Considering that an air gap of approximately 11.5 cm separates the HV electrode from the grounded electrode, the peak of P(t) is set at approximately 23 kA [27], [28]. A(t) and P(t) at different current settings are plotted in Figures 5(b) and 5(c), respectively.…”

Section: B Npap and Pfa Simulation Conditionsmentioning

confidence: 99%

A Comparative Study of Power Frequency Arcs Influenced by Negative-Polarity Artificial Pulses

Luo

Wang

et al. 2022

IEEE Access

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In this paper, we propose a method to guide power frequency arcs (PFAs) and investigate the electric potential and temperature characteristics of PFAs when a negative-polarity artificial pulse (NPAP) is applied from an artificial pulse generator. Based on a two-dimensional finite-element geometrical simulation model, we acquire and analyze numerical simulation results for the electric-potential and temperature distributions in the presence and absence of NPAPs. The simulation results indicate that the NPAPs accelerate the air ionization and streamer breakdown processes, which physically affects the electric potential and temperature distributions. In addition, to determine how the NPAPs affect the PFA discharge process, we qualitatively compare the arc plasma-coupling simulation results, which suggest that the NPAPs either modify the path of the PFA or change the discharge characteristics. Moreover, we use a PFA generator to experimentally investigate the PFA voltage. These experiments enable direct observation of the PFA path produced by NPAP guides. Finally, the simulation and experimental results demonstrate that the NPAPs provide innovative, simple, and cost-effective improvements in the efficiency of arc-extinguishing devices. This technique is suitable for use with arc-extinguishing devices and has significant prospects for applications in other fields. INDEX TERMSArtificial pulse generator, electric potential, negative polarity artificial pulses, arc plasmacoupling simulation, power frequency arc.

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Section: B Npap and Pfa Simulation Conditionsmentioning

confidence: 99%

A Comparative Study of Power Frequency Arcs Influenced by Negative-Polarity Artificial Pulses

Luo

Wang

et al. 2022

IEEE Access

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“…The relationship between shock pressure and cut-off arc radial tolerance pressure impact is analyzed by comparing the cut-off pressure with the overpressure reflection pressure to determine whether the arc can be cut off [24].…”

Section: Discharge Channel Cut-off Mechanismmentioning

confidence: 99%

Mechanism Analysis and Multiphysics Validation of Lightning Attenuation in Constrained Space

Wang

et al. 2022

IEEE Access

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The problem of resistance reduction has always been the key and difficult point of lightning protection. However, the problem of reducing the grounding resistance efficiently has not been solved. A method is introduced in this paper to solve this problem from the lightning current attenuation. The lightning discharge shock wave mechanism, shock overpressure reflection mechanism, and arc truncation mechanism are included to theoretically analyze the lightning current attenuation mechanism. The overpressure of the lightning discharge is much higher than the cut-off arc radial tolerance pressure, which contributes to the temporarily closing of discharge channel. Moreover, a lightning discharge model is established in COMSOL to simulate the process of discharge in lightning current. The results show that the pressure in the tube reaches up to 4×10 8 Pa rapidly, and the velocity in the mouth of the tube could reach as high as 4200 m/s. Finally, the current attenuation experiments are designed to validate the lightning current attenuation effect. The results show that the current is attenuated by the action of the prototype, the amplitude of the impulse current decreased from 66.95 kA to 35.10 kA, and the steepness of the impulse current decreased from 18.49 kA/µs to 4.14 kA/µs. All of the results show that this method could efficiently attenuate lightning currents. INDEX TERMSGrounding resistance, lightning current, lightning protection, current attenuation. YANG LU received the B.S. degree in electrical engineering and its automation from Jiangsu University, China, in 2020. He is currently pursuing the master's degree with Guangxi University, Nanning, China. His research interests include high voltage technology and modern lightning protection technology. JUFENG WANG received the M.Sc. and Ph.D. degrees in high voltage engineering from Wuhan

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

Cited by 2 publications

References 26 publications

A Comparative Study of Power Frequency Arcs Influenced by Negative-Polarity Artificial Pulses

A Comparative Study of Power Frequency Arcs Influenced by Negative-Polarity Artificial Pulses

Mechanism Analysis and Multiphysics Validation of Lightning Attenuation in Constrained Space

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