Numerical simulation of vacuum arc movement between transverse magnetic field contacts

Xiu, Shixin; Jiang, Yuzi; Liu, Zixi; Liu, Zhanpeng; Yang, Jinwang; Qu, Chenchen

doi:10.1063/5.0067036

Cited by 2 publications

(2 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…And 𝜂 is the viscosity of the fluid. [1], which means the 10kA high-current arc fluid at the speed of subsonic velocity. The Mach regime was calculated, which was classified into "low Mach number".…”

Section: Mathematical Model Of Plasma Arc In Db DC Vcbmentioning

confidence: 99%

“…The mechanism of the vacuum arc is complicated, the interplay of the double-break circuit breaker is still under investigation. Because of the asynchronous breaking of the opening mechanism, the gaps between the contact of the double-break vacuum circuit breaker different at the same time, which makes the arc-extinguishing time of two breakers different [1][2][3] . At the same time, the dissimilar character of arcs made the magnetic field not quite the same, accordingly, the Lorentz force was different.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Study of plasma-related parameters and self- generated TMF of contact under DB-DC VCB delayed breaking conditions

Yang,

Huang,

Shan

et al. 2024

Preprint

View full text Add to dashboard Cite

Taking the mechanical double-break DC vacuum circuit breaker as the research object, the magnetic field and temperature field distribution between the breaks and the plasma characteristics under the working condition of gap difference caused by actuator dispersion are investigated to explore the difference of arc characteristics between the two breaks with different gaps. Based on the system of equations of Maxwell and magnetohydrodynamic (MHD) equations, a non-simultaneous breaking model of the DB DC VCB is established, and parameters such as magnetic flux density, plasma velocity, inter-contact pressure, and ion and electron temperatures are calculated. The simulation results show that the cathode surface field emission effect is stronger in the small gap break (delayed breaking break). Besides, in the small gap break, the arc temperature in is higher, the rate of decrease of temperature is lower, the electron velocity is higher, the magnetic flux density is lower, the regulatory ability of magnetic field is weaker, and the plasma diffusion speed is slower. In the arc ignition stage, the arc aggregation state duration of small gap break is longer than the normal break, and the arc transition time in small gap break is increased, which means the arc in small gap break get diffusion state later, and it is not conducive to the plasma diffusion and arc energy dissipation. Therefore, the arc energy density between delayed breaking break is greater, the arc morphology transition time is longer, the residual particle concentration after arc extinguishing is higher, and the probability of re-strike breakdown increases with the increase of gap difference. Improving the synchronization of the actuator could improving the breaking ability of DB DC VCB.

show abstract

Section: Mathematical Model Of Plasma Arc In Db DC Vcbmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%