Title :
Electrical charges generated by a flow of oil in power transformers
Author :
Touchard, G. ; Grimaud, P.O. ; Romat, H. ; Moreau, O.
Author_Institution :
Lab. de Physique et Mecanique des Fluides, CNRS, Poitiers, France
Abstract :
An attempt has been made to gain a better understanding of the formation of electrical charge appearing within oil circulating inside a rectangular pressboard channel. Experiments confirm that the charge accumulated on the surface of the pressboard does not limit the process of charge generation. It is concluded that the roughness of the surface and its nonhomogeneity are factors that must be taken into account in order to explain the high-energy level of the discharges occurring in power transformers
Keywords :
transformer oil; charge generation; discharges; electrical charges; oil flow; power transformers; rectangular pressboard channel; surface roughness; Coatings; Contacts; Ducts; Electrical equipment industry; Geometry; Industrial accidents; Petroleum; Power generation; Power transformers; Space charge;
Conference_Titel :
Conduction and Breakdown in Dielectric Liquids,1993., ICDL '93., IEEE 11th International Conference on
Conference_Location :
Baden-Dattwil
Print_ISBN :
0-7803-0791-7
DOI :
10.1109/ICDL.1993.593993
