Effect of temperature on surface discharge in oil

Author

Niasar, M. Ghaffarian ; Clemence, R. ; Wang, X. ; Nikjoo, R. ; Edin, H.

Author_Institution

Sch. of Electr. Eng., KTH R. Inst. of Technol., Stockholm, Sweden

fYear

2012

fDate

14-17 Oct. 2012

Firstpage

96

Lastpage

99

Abstract

In this paper surface discharge along the oil-pressboard interface was investigated. Surface discharges were measured both in time domain by means of an oscilloscope and as phase resolve patterns. The effect of temperature from 20 °C to 90 °C on surface discharge inception, extinction and surface flashover voltage were investigated. Trend of number and maximum magnitude of PD was compared for 20 °C and 90 °C over time. The effect of voltage rise and surface flashover on number and maximum magnitude of PD were investigated. The results show that PD inception voltage is lower for higher temperature but surface flashover voltage is higher for higher temperature. However for 90 °C the final damage due to surface discharge is much severe compared to 20 °C.

Keywords

flashover; oscilloscopes; power transformer insulation; surface discharges; time-domain analysis; transformer oil; PD inception voltage; PD magnitude; oil surface discharge; oil-pressboard interface; oscilloscope; phase resolve patterns; surface discharge extinction; surface discharge inception; surface flashover; surface flashover voltage; temperature 20 degC to 90 degC; temperature effect; time domain; voltage rise; Discharges (electric); Flashover; Partial discharges; Surface discharges; Surface treatment; Temperature; Temperature measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena (CEIDP), 2012 Annual Report Conference on

Conference_Location

Montreal, QC

ISSN

0084-9162

Print_ISBN

978-1-4673-1253-0

Electronic_ISBN

0084-9162

Type

conf

DOI

10.1109/CEIDP.2012.6378731

Filename

6378731