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Title: Plasma model of discharge along a dielectric surface in N{sub 2}/O{sub 2} mixtures

Abstract

Surface discharge phenomena often occur across the insulator in power systems, damaging the electrical equipment, but the mechanism of the electron multiplication stage during surface discharge is not yet fully understood. As such, it is necessary to investigate the mechanism of discharge along a dielectric surface. In this paper, we develop a numerical fluid model, analyzing the dynamic characteristics of discharge including the electron density, electron temperature, surface charge density, and electric field. Our results show that the electron density peaks in the head of the streamer channel, at which time the electron temperature also reaches its maximum. A thin layer of plasma can be formed, filled with a mix of positive and negative charges, so the space normal electric field in the streamer channel can be positive or negative. In addition, the surface tangential electric field and electric potential are closely related, and the potential steadily increases because there is a steady tangential electric field in the streamer channel.

Authors:
; ; ; ; ;  [1]
  1. State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing 400044 (China)
Publication Date:
OSTI Identifier:
22600148
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 23; Journal Issue: 6; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CHARGE DENSITY; DIELECTRIC MATERIALS; ELECTRIC FIELDS; ELECTRIC POTENTIAL; ELECTRICAL EQUIPMENT; ELECTRON DENSITY; ELECTRON TEMPERATURE; ELECTRONS; FLUIDS; MIXTURES; NITROGEN; OXYGEN; PLASMA; POWER SYSTEMS; SURFACES; THIN FILMS

Citation Formats

Sima, Wenxia, E-mail: cqsmwx@cqu.edu.cn, Liu, Chunxiang, Yang, Ming, Shao, Qianqiu, Xu, Hang, and Liu, Sanwei. Plasma model of discharge along a dielectric surface in N{sub 2}/O{sub 2} mixtures. United States: N. p., 2016. Web. doi:10.1063/1.4949767.
Sima, Wenxia, E-mail: cqsmwx@cqu.edu.cn, Liu, Chunxiang, Yang, Ming, Shao, Qianqiu, Xu, Hang, & Liu, Sanwei. Plasma model of discharge along a dielectric surface in N{sub 2}/O{sub 2} mixtures. United States. doi:10.1063/1.4949767.
Sima, Wenxia, E-mail: cqsmwx@cqu.edu.cn, Liu, Chunxiang, Yang, Ming, Shao, Qianqiu, Xu, Hang, and Liu, Sanwei. Wed . "Plasma model of discharge along a dielectric surface in N{sub 2}/O{sub 2} mixtures". United States. doi:10.1063/1.4949767.
@article{osti_22600148,
title = {Plasma model of discharge along a dielectric surface in N{sub 2}/O{sub 2} mixtures},
author = {Sima, Wenxia, E-mail: cqsmwx@cqu.edu.cn and Liu, Chunxiang and Yang, Ming and Shao, Qianqiu and Xu, Hang and Liu, Sanwei},
abstractNote = {Surface discharge phenomena often occur across the insulator in power systems, damaging the electrical equipment, but the mechanism of the electron multiplication stage during surface discharge is not yet fully understood. As such, it is necessary to investigate the mechanism of discharge along a dielectric surface. In this paper, we develop a numerical fluid model, analyzing the dynamic characteristics of discharge including the electron density, electron temperature, surface charge density, and electric field. Our results show that the electron density peaks in the head of the streamer channel, at which time the electron temperature also reaches its maximum. A thin layer of plasma can be formed, filled with a mix of positive and negative charges, so the space normal electric field in the streamer channel can be positive or negative. In addition, the surface tangential electric field and electric potential are closely related, and the potential steadily increases because there is a steady tangential electric field in the streamer channel.},
doi = {10.1063/1.4949767},
journal = {Physics of Plasmas},
number = 6,
volume = 23,
place = {United States},
year = {Wed Jun 15 00:00:00 EDT 2016},
month = {Wed Jun 15 00:00:00 EDT 2016}
}