摘要详情

ID / 提交时间

120 / 2024-04-13 18:16:55

标题

Study on Dynamic Behavior of SF6/N2 Discharge under Narrow-gap Uniform Electric Field

关键字

SF6/N2,hydrodynamic model,narrow-gap configuration,seed electron cluster,spatio-temporal scale

主题及专题

1)Emerging HV Switching Technologies

状态

终稿

作者

Yingli Wang / Harbin University of Science and Technology；College of Measurement and Communication

Dongyue Cao / Harbin University of Science and Technology；College of Measurement and Communication

MingQuan Zhang / Harbin University of Science and Technology;College of Measurement and Communication

Qiming Lu / Harbin University of Science and Technology;College of Measurement and Communication

Dianchun Zheng / Harbin University of Science and Technology；School of Electrical and Electronic Engineering

摘要

Although the sulfur hexafluoride (SF₆) is a gaseous dielectric widely used in the field of high voltage insulation, due to its extremely high greenhouse effect, its gradual use is replaced by the SF₆/N₂ gas mixture. Therefore, the study of the discharge mechanism of SF₆/N₂ gas mixture under special application conditions has theoretical significance and practical application value.

In this paper, a hydrodynamic model of narrow-gap SF₆/N₂ gas discharge with flat electrode configuration was established, and the microscopic behavior characteristics of sulfur hexafluoride gas discharge under uniform electric field conditions were strictly studied, and the whole process of discharge triggering, generation of charged particles, particle adhesion, particle recombination, and evolution of discharge trajectory until gap breakdown was revealed. What's more, different discharge triggering conditions were further explored, and the influence mechanism of the initial seed electron density on the model discharge process was investigated in detail. The research results showed that the initial seed electron group density peak N₀ was closely related to the spatial charged particles, the gap electric field distribution, and the evolution of the discharge trajectory. Although the initial seed electron group position Z₀ has a certain effect on the microscopic behavior of discharge, it is mainly reflected in the spatio-temporal scale of the streamer development process.

The research results of this paper will provide a theoretical basis and technical support for the scientific application of SF₆/N₂ gas.