Partial discharges and streamers in liquid dielectrics-the significance of the inception voltage

Author

Forster, Eric O.

Author_Institution

Dept. of Phys., Rutgers Univ., Newark, NJ, USA

Volume

28

Issue

6

fYear

1993

fDate

12/1/1993 12:00:00 AM

Firstpage

941

Lastpage

946

Abstract

Recent studies have determined the partial discharge inception voltage (PDIV) of several practical insulating oils using conventional PD measurements. They show that the PDIV is a reasonably reproducible quantity. Independently, using electrooptical techniques, the streamer inception voltages (SIVs) in these liquids have been measured. These SIV values are found to be reproducible, within experimental error. Both techniques yield similar inception values. These results suggest that the PD and streamer phenomena are closely related. It is shown that the PDIV is independent of the gap and hence the average electric field. The SIV is found to be independent of the applied voltage. These observations suggest that the inception of both phenomena is controlled by the local rather than the average applied field. The experimental observations are interpreted and a theory is advanced to explain them

Keywords

discharges (electric); electric breakdown of liquids; insulating oils; insulation testing; partial discharges; transformer insulation; PDIV; SIV; average electric field; capacitor insulation; electrooptical techniques; inception voltage; insulating oils; liquid dielectrics; local applied field; partial discharge; streamers; transformer insulation; Capacitors; Dielectric liquids; Dielectrics and electrical insulation; Electric variables measurement; Gain measurement; Oils; Partial discharges; Pulse measurements; Time measurement; Voltage;

fLanguage

English

Journal_Title

Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

0018-9367

Type

jour

DOI

10.1109/14.249367

Filename

249367