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

Author

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

Author_Institution

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

Volume

20

Issue

3

fYear

2013

fDate

Jun-13

Firstpage

876

Lastpage

886

Abstract

The non-breakdown and breakdown streamers in paraffinic model oil were investigated under negative "step" voltages. Experiments were performed with the point-plane gap of 8 cm and voltage up to 540 kV. Streamer behaviors were observed with shape, stopping length, velocity, current and light emission pulses. Carbon particles markedly reduce inception and breakdown voltages of streamers, while dissolved gases have a little effect on these voltages. Both low ionization potential and electron scavenging additives accelerate the streamers. However, the electron scavenger shows a much stronger influence on streamers than the low ionization potential additive.

Keywords

additives; discharges (electric); impurities; ionisation; oils; breakdown streamer; carbon particle; dissolved gas; distance 8 cm; electron scavenging additive; impurity influence; ionization potential additive; light emission pulse; negative step voltage; negative streamer; nonbreakdown streamer; paraffinic model oil; point-plane gap; voltages breakdown; Additives; Breakdown voltage; Carbon; Electric breakdown; Gases; Shape; Streaming media; Streamers; initiation; propagation; 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.2013.6518957

Filename

6518957