电器与能效管理技术 ›› 2025, Vol. 0 ›› Issue (1): 28-32.doi: 10.16628/j.cnki.2095-8188.2025.01.005

• 研究与分析 • 上一篇    下一篇

SF6/N2混合气体的直流小电流开断电弧特性研究

王周晶, 陈诗哲, 赵东旭, 李兴文   

  1. 西安交通大学 电工材料电气绝缘全国重点实验室, 陕西 西安 710049
  • 收稿日期:2024-11-28 出版日期:2025-01-30 发布日期:2025-03-17
  • 作者简介:王周晶(2000—),女,硕士研究生,研究方向为气体放电与高压电器。|陈诗哲(2000—),男,硕士研究生,研究方向为气体放电与高压电器。|赵东旭(1997—),男,硕士研究生,研究方向为气体放电与高压电器。

Study on Arc Characteristics of DC Low Current Interruption in SF6/N2 Gas Mixture

WANG Zhoujing, CHEN Shizhe, ZHAO Dongxu, LI Xingwen   

  1. State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University, Xi’an 710049, China
  • Received:2024-11-28 Online:2025-01-30 Published:2025-03-17

摘要:

为研究SF6/N2混合气体的电弧特性,建立了一套直流小电流开断平台,通过高速摄像机和可视化样机拍摄不同SF6气体含量、不同工况下SF6/N2混合气体的电弧燃烧过程。研究表明,随着充气压力的升高和SF6气体含量的升高,电弧半径减小,弧柱中心亮度增强;随着开断速度的减小和电流的增大,电弧半径增大,电弧亮度整体增强。燃弧时间和电弧电压临界值与混合气体中的SF6气体含量呈负相关关系,而与充气压力呈正相关关系。电弧图像的辅助分析方法,有助于理解SF6/N2混合气体的灭弧机理,推动SF6/N2混合气体在开关设备中的应用。

关键词: SF6/N2混合气体, 电弧图像, 直流, 电弧电压

Abstract:

To investigate the arc characteristics of the SF6/N2 gas mixture,a direct current (DC) lower current interruption platform was developed.A high-speed camera and a visual prototype were used to capture the arc combustion process at various SF6/N2 mixture concentrations and different operating conditions.The research showed that with the increase of filling pressure and SF6 gas content,the arc radius decreased and the center brightness of arc increased.With the decrease of interrupting speed and the rise of current level,arc radiuses and arc brightness both increased.The arc burning time and arc voltage critical value were inversely correlated with SF6 gas content,but positively correlated with filling pressure.The auxiliary analysis of arc images facilitated an understanding of the extinguishing mechanisms associated with SF6/N2 gas mixture,thereby advancing its application in switchgear technology.

Key words: SF6/N2 gas mixture, arc images, DC, arc voltage

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