Title :
The effects of prolonged exposure of paper insulation to fast repeating transients
Author :
Koltunowicz, T. ; Bajracharya, G. ; Djairam, D. ; Al-Suhaily, Muhannad ; Smit, J.
Author_Institution :
High Voltage Eng. & Manage., Delft Univ. of Technol., Delft, Netherlands
Abstract :
Paper insulation impregnated with oil has been stressed with fast repeating transients. the frequency was set to 5 kHz, 8kHz and 10 kHz and the times to failure showed a much faster breakdown rate then when compared with a clean AC waveform at 50 Hz. The times to failure were also different for each frequency showing that repetition frequency has a major effect on the failure time. The material was also analyzed with tan δ measurements and these measurements have shown that the paper sample has degraded much faster with the addition of transients.
Keywords :
insulating oils; paper; power system transients; breakdown rate; clean AC waveform; fast repeating transient; insulating oil; paper insulation; tan δ measurement; Aging; Electric breakdown; Insulation; Power transformer insulation; Time frequency analysis; Transient analysis; Windings;
Conference_Titel :
High Voltage Engineering and Application (ICHVE), 2010 International Conference on
Conference_Location :
New Orleans, LA
Print_ISBN :
978-1-4244-8283-2
DOI :
10.1109/ICHVE.2010.5640836
