Title :
Mechanism of charge accumulation at flowing oil/pressboard interface based on optical measurement of electric field
Author :
Inoue, N. ; Kato, K. ; Shimizu, R. ; Nakagami, Y. ; Iwai, H. ; Okubo, H.
Author_Institution :
Nagoya Univ., Japan
Abstract :
Electrostatic charging may occur in oil immersed power transformers because of a flow electrification phenomenon. In this paper, we directly measured time dependence of electric field strength in the flowing oil using an electro-optic method based on the Kerr effect, to clarify the mechanism of charge accumulation at the flowing oil/pressboard (PB) interface. We quantitatively discussed measurement results from the viewpoint of charge behavior. Finally, we found the contribution volume of charge movement and quantified the charge density
Keywords :
power transformer insulation; power transformer testing; static electrification; transformer oil; Kerr effect; charge accumulation; charge behavior; charge density; contribution volume; electric field; electric field strength; electrostatic charging; flow electrification phenomenon; flowing oil/pressboard interface; oil immersed power transformers; optical measurement; time dependence; Charge measurement; Current measurement; Dielectrics and electrical insulation; Electric variables measurement; Electrodes; Fluid flow measurement; Kerr effect; Oil insulation; Petroleum; Power transformer insulation;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 2001 Annual Report. Conference on
Conference_Location :
Kitchener, Ont.
Print_ISBN :
0-7803-7053-8
DOI :
10.1109/CEIDP.2001.963599
