Breakdown characteristics in air gaps with artificial floating metals under DC voltage

Author

Kubuki, Mamoru ; Yoshimoto, Ryuichi ; Tanoue, Kazuki ; Hara, Masanori

Author_Institution

Dept. of Electr. Eng., Kyushu Univ., Fukuoka, Japan

Volume

2

Issue

1

fYear

1995

fDate

2/1/1995 12:00:00 AM

Firstpage

155

Lastpage

166

Abstract

The DC breakdown characteristics of a sphere-to-sphere gap with conducting objects supported by an insulator rod in atmospheric air are investigated experimentally to provide fundamental parameters determining the breakdown voltage in the presence of floating objects around DC power apparatus by an air insulation. The shape of tested floating objects made of metal is plate, needle or sphere. Experimental results show that the main factors affecting the breakdown voltage are the shape and size of floating objects, the object location and the gap length. If the object is placed at the location giving the lowest breakdown voltage, any object lowers the breakdown voltage below that without the relevant objects

Keywords

HVDC power transmission; air gaps; corona; insulator testing; DC breakdown characteristics; DC power apparatus; air gaps; artificial floating metals; atmospheric air; conducting objects; corona; gap length; insulator rod; needle; object location; plate; sphere; sphere-to-sphere gap; Air gaps; Breakdown voltage; Corona; Dielectrics and electrical insulation; Electric breakdown; Electrodes; Metal-insulator structures; Needles; Shape; Testing;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/94.368691

Filename

368691