Title :
Influence of additives and pressboard degradation on flow electrification in high power transformers
Author :
Paillat, T. ; Moreau, E. ; Touchard, G.
Author_Institution :
Lab. d´´Etudes Aerodynamiques, CNRS, Poitiers, France
Abstract :
The aim of this work is a better understanding of the flow electrification process occurring in high power transformers. In order to characterize the effect of the pressboard degradation and the additive benzotriazol, the experiments consist in measuring the streaming currents generated by an oil flow through a pressboard sample. Two main results have been obtained: the addition of several ppm of benzotriazol in oil permits to reduce significantly the flow electrification process whereas the degradation of the pressboard by electrical discharges induces a high increase of the phenomenon
Keywords :
electrohydrodynamics; power transformer insulation; static electrification; transformer oil; benzotriazol additive; electrical discharge; flow electrification; high power transformer; oil; pressboard degradation; streaming current; Chemicals; Degradation; Dielectric liquids; Dielectrics and electrical insulation; Impurities; Laboratories; Petroleum; Power transformer insulation; Power transformers; Solids;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1998. Annual Report. Conference on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-5035-9
DOI :
10.1109/CEIDP.1998.733915
