Title :
PD time sequential and light emission properties as pre-breakdown phenomena of SF6/N2/CO2 gas mixture
Author :
Ohtsuka, S. ; Koumura, M. ; Cho, M. ; Nakamura, M. ; Hikita, M.
Author_Institution :
Kyushu Inst. of Technol., Kitakyushu, Japan
Abstract :
This paper describes partial discharge (PD) properties of the SF6/N2/CO2 ternary gas mixture which has higher breakdown voltage than an SF6/N2 gas mixture by composing CO2 and N2 with a suitable rate. PD time sequential properties under a positive DC voltage application and PD light emission properties under a positive lightning impulse voltage application are investigated to clarify the effect of adding CO2 from the viewpoint of pre-breakdown phenomena. Based on the PD phenomena, we discuss the mechanism of an increase in breakdown voltage due to the addition of CO2.
Keywords :
SF6 insulation; carbon compounds; gas insulated switchgear; gas mixtures; luminescence; nitrogen; partial discharges; CO2; GIS; N2; PD light emission properties; PD time sequential properties; SF6; SF6-N2-CO2; SF6/N2/CO2 gas mixture; breakdown voltage increase; partial discharge properties; positive DC voltage application; positive lightning impulse voltage application; pre-breakdown phenomena; ternary gas mixture; Coaxial components; Electrodes; Flashover; Lightning; Needles; Optical pulses; Partial discharges; Pulse measurements; Testing; Voltage;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 2002 Annual Report Conference on
Print_ISBN :
0-7803-7502-5
DOI :
10.1109/CEIDP.2002.1048917
