DocumentCode :
1599075
Title :
Influence of temperature to developing processes of surface discharges in oil-paper insulation
Author :
Wang, Hui ; Li, Chengrong ; He, Huimin
Author_Institution :
Beijing Key Lab. of High Voltage & EMC, North China Electr. Power Univ., Beijing, China
fYear :
2010
Firstpage :
1
Lastpage :
4
Abstract :
In order to study the influence of temperature on the developing processes of surface discharges in oil-paper insulation, a discharge test assembly is established to simulate the surface discharges in transformers. It consists of a surface discharge model, a test rig and a PD detection system. Long-term laboratory tests under 60 °C and 100 °C were conducted to observe the entire evaluation process of surface partial discharges from its inception to the eventual occurrence of flashover, using boosting voltage application. PD was detected by conventional impulse current (CIC) signals. Phenomena and features of surface discharges at different developing stages were observed and captured. As a result, the flashover-voltage is much lower, the initial voltage is a lot lower, and the destruction is much serious at 100°C. These features could be used as effective criteria to infer different evolutionary stages of surface discharges under different temperatures.
Keywords :
paper; partial discharges; surface discharges; transformer oil; CIC signals; PD detection system; conventional impulse current signals; discharge test assembly; flashover voltage; long-term laboratory tests; oil-paper insulation; surface discharge developing processes; surface discharge model; temperature 100 degC; temperature 60 degC; transformers; Assembly; Flashover; Insulation testing; Laboratories; Oil insulation; Partial discharges; Power transformer insulation; Surface discharges; System testing; Temperature; developing Processes; surface discharge; temperature;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electrical Insulation (ISEI), Conference Record of the 2010 IEEE International Symposium on
Conference_Location :
San Diego, CA
ISSN :
1089-084X
Print_ISBN :
978-1-4244-6298-8
Type :
conf
DOI :
10.1109/ELINSL.2010.5549771
Filename :
5549771
Link To Document :
بازگشت