Influence of chamber structure on arc quenching in multigap system

Li, Zijian; Wang, Jufeng; Zhou, Xin; Huang, Shangshi; Yan, Renbao; Xia, Zhijian

doi:10.1049/hve.2019.0064

Cited by 13 publications

(4 citation statements)

References 17 publications

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“…However, we can see that the negative streamer of the PFA channel does not vanish because the ionized particles remain airborne, and the PFA energy increases. The temperature of the arc plasma is highest at the longitudinal center line (>14 000 K), very close to the values reported in the arc-extinguishing literature [7]− [9].…”

Section: Analysis Of Temperature Chacteristicssupporting

confidence: 85%

See 1 more Smart Citation

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: Analysis Of Temperature Chacteristicssupporting

confidence: 85%

“…In recent years, arc-extinguishing devices (AEDs) [7]- [9] have emerged to prevent lightning overvoltage in powerline systems. AEDs should be installed in parallel gaps near insulators (usually on 10-kV and 35-kV grade transmission lines).…”

Section: Introductionmentioning

confidence: 99%

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

Luo

Wang

et al. 2022

IEEE Access

Self Cite

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“…Such multi-physical field coupling may also lead to the relevant parameters between different physical fields interact. To simplify the model, the following assumptions are made [25]: a) Arc plasma involved in this paper is a high heat and long arc plasma that satisfies the thermodynamic local thermodynamic equilibrium; b) Thermal conductivity, kinetic viscosity, electrical conductivity, constant pressure heat capacity are all functions of temperature.…”

Section: Arc Multi-physics Field Simulation a Arc Simulation Modelmentioning

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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“…Literature [14] established a vacuum arc model under an axial magnetic field, studied current density distribution under different magnetic fields and different currents, and analysed the shrinkage effect of currents in a vacuum arc. Literature [15] established an arc model of a multi-gap system, simulated the arc behaviour in a semi-closed chamber, and analysed the influence of the chamber structure on the arc. Literature [16] established a nozzle arc model, studied the morphology and energy exchange mechanism of N 2 , CO 2 , and SF 6 when the arc was extinguished, and compared and analysed the three gases' breaking capacity.…”

Section: Introductionmentioning

confidence: 99%

Research of simulation and experiment on arc characteristics of gas mechanical switch

Jiang,

Qu,

et al. 2024

High Voltage

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An arc is the high‐temperature discharge plasma produced in the opening process of mechanical switches, which directly affects the breaking capability of a hybrid DC circuit breaker. According to the physical mechanism of an electric arc, the construction of an arc model for simulation analysis is an important technical means in the electrical field. In this study, based on the theory of magneto hydrodynamics (MHD), a gas mechanical switch model of a natural commutation DC circuit breaker with a compound gap is established. The arc motion process under different conditions is simulated and calculated. The influence of different initial pressures, different opening speeds, and different striking currents on the arc voltage characteristics is analysed. The results show that the larger the gas pressure, the smaller the arc volume and the higher the arc voltage. The faster the opening speed, the longer the arc and the higher the arc voltage; with the increase of the current, the arc voltage increases rapidly at a low current, while the arc voltage increases slowly at a high current.

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Influence of chamber structure on arc quenching in multigap system

Cited by 13 publications

References 17 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

Research of simulation and experiment on arc characteristics of gas mechanical switch

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