Coupling model of AC filter branch in SF<sub>6</sub> circuit breaker during the break process

Peng, Zaixing; Li, Kai; Nan, Yanwei; Wang, Song; Yang, Fei; Sun, Hao; La, Yuan

doi:10.1088/2058-6272/abb4c1

Cited by 3 publications

(1 citation statement)

References 13 publications

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“…generally, the calculated arc motion is faster than the measured results [20]. Therefore, in this work, the turbulence effect inside the arc chamber is considered and the k-epsilon turbulence equation is used to model the shear stress transport [3,44]. The k-ε model contains two transport equations for k and e [45].…”

Section: Governing Equations and Boundary Conditionsmentioning

confidence: 99%

Research on arc root stagnation when small current is interrupted in self-excited circuit breaker

Peng¹,

Li²,

Cao³

et al. 2022

Plasma Sci. Technol.

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Self-excited DC air circuit breaker(SE-DCCB) has been widely used in urban rail transit for its excellent stability. It can realize forward and reverse interrupting, but has difficulty in interrupting small current due to the phenomenon of arc root sticking at the entrance of the arc chamber in the splitting process which is known as arc root stagnation. A coupling model of self-excited magnetic field and magnetohydrodynamics (MHD) is established for the SE-DCCB with the traditional structure. The magnetic field, temperature and airflow distribution in the arc chamber are investigated with interrupting current 150 A. The simulation results show that the direction and magnitude of magnetic blowout force are the dominant factors of the arc root stagnation. The local high temperature of the arc chamber due to arc root stagnation increases the obstruction effect of airflow vortex on the arc root movement which increases the arc duration time of small current interrupting seriously. Based on the research, the structure of magnetic conductance plate of the actual product is improved which can improve the direction and magnitude of the magnetic blowout force at the arc root, so as to restrain the development of airflow vortex effectively, and solve the problem of the arc root stagnation when small current is interrupted. The simulation results show that the circuit breaker with improved structure has a better performance for small current interrupting range from 100 A to 350 A.

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Section: Governing Equations and Boundary Conditionsmentioning

confidence: 99%

Research on arc root stagnation when small current is interrupted in self-excited circuit breaker

Peng¹,

Li²,

Cao³

et al. 2022

Plasma Sci. Technol.

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Research on the Influence of Harmonics on Interruption Performance of High-Voltage Circuit Breaker

Zhang,

Wang,

et al. 2024

Lecture Notes in Electrical Engineering

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Mechanisms for insulation recovery during repetitive breakdowns in gas gaps

Li,

Chen,

et al. 2023

Physics of Plasmas

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The insulation recovery during repetitive breakdowns in gas gaps is a fundamental scientific issue in both traditional and emerging electrical technology fields, which has received extensive attention over the years. This paper provides a systematic review of research methods for insulation recovery in repetitive breakdowns of gas gaps, progress made in understanding the thermal–hydrodynamic processes involved in this recovery (dissipation of deposited energy and restoration of neutral gas density), as well as the memory effect resulting from repetitive discharges and breakdowns (dominant factors and their underlying mechanisms). Based on current results, it is proposed that the insulation recovery of repetitive gas gaps breakdowns results from the synergistic effect between post-breakdown thermal-hydrodynamic processes and memory effects. This review aims to clarify the boundary and interplay between hydrodynamic processes and memory effects, as well as reveal their coupling relationship and synergistic mechanism. It also seeks to overcome barriers between related research fields, ultimately facilitating a resolution to the issue.

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Coupling model of AC filter branch in SF₆ circuit breaker during the break process

Cited by 3 publications

References 13 publications

Research on arc root stagnation when small current is interrupted in self-excited circuit breaker

Research on arc root stagnation when small current is interrupted in self-excited circuit breaker

Research on the Influence of Harmonics on Interruption Performance of High-Voltage Circuit Breaker

Mechanisms for insulation recovery during repetitive breakdowns in gas gaps

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Coupling model of AC filter branch in SF6 circuit breaker during the break process

Cited by 3 publications

References 13 publications

Research on arc root stagnation when small current is interrupted in self-excited circuit breaker

Research on arc root stagnation when small current is interrupted in self-excited circuit breaker

Research on the Influence of Harmonics on Interruption Performance of High-Voltage Circuit Breaker

Mechanisms for insulation recovery during repetitive breakdowns in gas gaps

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Product

Resources

About

Coupling model of AC filter branch in SF₆ circuit breaker during the break process