Influence of impurities and additives on positive streamers in paraffinic model oil

Author

Dung, N.V. ; Høidalen, H.K. ; Linhjell, D. ; Lundgaard, L.E. ; Unge, M.

Author_Institution

Dept. of Electr. Power Eng., Norwegian Univ. of Sci. & Technol., Trondheim, Norway

Volume

19

Issue

5

fYear

2012

fDate

10/1/2012 12:00:00 AM

Firstpage

1593

Lastpage

1603

Abstract

This paper presents an experimental study of positive streamers in paraffinic model oil in a point-plane gap. The investigation was performed concerning the influence of voltage, impurities and additives. It was seen how increased voltage changes streamer shape and speed resulting in different propagation modes. Carbon particles markedly reduce inception, breakdown and acceleration voltages, while dissolved gases/air have little effect on these voltages. A low ionization potential additive decelerates the streamers, while an electron scavenger shows an increase in streamer velocity. The correlation between propagation velocity and streamer´s branching is discussed.

Keywords

additives; discharges (electric); impurities; insulating oils; ionisation; acceleration voltages; breakdown voltages; carbon particles; electron scavenger; impurities; low ionization potential additive; paraffinic model oil; point-plane gap; positive streamers; propagation velocity; streamer branching; Acceleration; Additives; Breakdown voltage; Carbon; Electric breakdown; Gases; Streaming media; Streamer; breakdown; initiation; stopping length; velocity;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/TDEI.2012.6311505

Filename

6311505