| Title |
Analysis of Medium Effect by Gas Pressure and Gap at Surface Discharge of Dry Air |
| Authors |
Dong-Young Lim ; Gyeong-Jun Min ; He-Rie Park ; Eun-Hyeok Choi ; Sant-Tae Choi ; Sng-Woo Bae ; Sang-Bong Lee ; Won-Ju Park ; Kwang-Sik Lee |
| DOI |
http://dx.doi.org/10.5207/JIEIE.2013.27.10.086 |
| Keywords |
Dry Air ; Gas Insulated Switchgear ; Insulation Technique ; Medium Effect ; Surface Discharge |
| Abstract |
In studies on an alternative insulating gas of SF6 gas, the section of the alternative gas and an insulation technique to improve its low dielectric strength have been reported, but very few attempts have been made at the dependence of a gas pressure and a gap as well as the medium effect in the alternative gas. The purpose of this paper is to analyze the dependence of the gas pressure and the gap at surface flashover voltage in dry air. The dependence is analyzed based on the medium effect. The medium effect by the gas pressure and the gap can be explained by surface roughness of a solid dielectric and an electrode as well as an electric field which decreases due to the correlation between the collision ionization coefficient and the gap, respectively. In addition, an insulation technique which can fabricate a compact eco-friendly gas insulated switchgear is proposed by the results of this paper. |