Title :
Influence of streaming electrification on creeping discharge of oil-paper insulation systems. (Study on dendritic discharge of barrier boards in power transformers)
Author :
Jia-xiang, Yang ; Xiao-Chun, Chi ; Li-Jian, Ding
Author_Institution :
Dept. of Electr. Mater. Eng., Harbin Inst. of Electr. Technol., China
Abstract :
In this paper, in order to investigate failures due to the dendritic discharge on the surface of barrier boards in power transformers, streaming electrification and its influence on creeping discharge of oil-paper insulation systems have been studied using experimental models. According to the experimental results, the reasons of the failures have been revealed. It has been found that the creeping discharge of oil-paper insulation systems are related to streaming electrification and, as the streaming electrification makes the creeping discharge voltage lower, the creeping discharge path is also influenced
Keywords :
electric breakdown; electrostatics; insulating oils; insulation testing; paper; power transformer insulation; power transformer testing; surface discharges; barrier boards; creeping discharge; dendritic discharge; oil-paper insulation systems; power transformers; streaming electrification; testing; Circuits; Control systems; Electrodes; Electron tubes; Leakage current; Oil insulation; Petroleum; Portable media players; Power transformer insulation; Valves;
Conference_Titel :
Properties and Applications of Dielectric Materials, 1994., Proceedings of the 4th International Conference on
Conference_Location :
Brisbane, Qld.
Print_ISBN :
0-7803-1307-0
DOI :
10.1109/ICPADM.1994.414146
