Plasma spectroscopy and diagnosis lab
Paper
Study of spatial and temporal evolution of Ar and F atoms in SF6/Ar microsecond pulsed discharge by optical emission spectroscopy
Release Time:2020-06-02
Hits:
Indexed by:
Journal Article
First Author:
Li, Hongyue
Correspondence Author:
Li, C (reprint author), Dalian Univ Technol, Sch Phys, Minist Educ, Key Lab Mat Modificat Laser Ion & Electron Beams, Dalian 116024, Peoples R China.
Co-author:
Liu, Jiamin,Feng, Chunlei,Ding, Hongbin,Wu, Xingwei,Li, Cong,Wang, Yong,Wu, Ding
Date of Publication:
2019-07-01
Journal:
PLASMA SCIENCE & TECHNOLOGY
Included Journals:
SCIE、EI
Document Type:
J
Volume:
21
Issue:
7
ISSN:
1009-0630
Key Words:
optical emission spectroscopy; partial discharge; SF6-insulated
equipment; spatial and temporal evolution
Abstract:
The study of sulfur hexafluoride (SF6) discharge is vital for its application in gas-insulated equipment. Direct current partial discharge (PD) may cause SF6 decomposition, and the decomposed products of SF6, such as F atoms, play a dominant role in the breakdown of insulation systems. In this study, the PD caused by metal protrusion defects is simulated by a needle-plate electrode using pulsed high voltage in SF6/Ar mixtures. The spatial and temporal characteristics of SF6/Ar plasma are analyzed by measuring the emission spectra of F and Ar atoms, which are important for understanding the characteristics of PD. The spatial resolved results show that both F and Ar atom spectral intensities increase first from the plate anode to the needle and then decrease under the conditions of a background pressure of 400 Pa, peak voltage of -1000 V, frequency of 2 kHz, pulse width of 60 mu s, and electrode gap of 5-9 mm. However, the distribution characteristics of F and Ar are significantly different. The temporal distribution results show that the spectral intensity of Ar decreases first and then increases slowly, while the spectral intensity of F increases slowly for the duration of the pulsed discharge at the electrode gap of 5 mm and the pulse width of 40-80 mu s.
Public QR code