Influence of pressboard ionizable groups on static electrification in power transformers

Author

Paillat, T. ; Charvet, N. ; Moreau, Olivier ; Mortha, G. ; Bertrand, Y. ; Touchard, G.

Author_Institution

Electrofluidodynamics Group, Poitiers Univ., France

fYear

2002

fDate

2002

Firstpage

180

Lastpage

183

Abstract

As a part of a research program in the field of flow electrification in power transformers, some fundamental studies have been engaged on the chemistry of this phenomenon. Previous works have shown that chemical composition of pressboards is highly involved in the kinetics and magnitude of the charge accumulation process. Present studies consist in focusing on the influence of the hydroxyl or carboxyl groups with regard to charge accumulation, measured from capacitive currents on insulated electrodes facing pressboard ducts. Special manufactured and modified pressboards have thus revealed that the phenomenon is highly related to carboxylic and hydroxyl groups content and also probably to the hydrophilicity of the oil/board.

Keywords

power transformer insulation; power transformer testing; static electrification; transformer oil; capacitive currents; charge accumulation process; ducts; flow electrification; hydrophilicity; insulated electrodes; kinetics; power transformers; pressboard ionizable groups; static electrification; Charge measurement; Chemical processes; Chemistry; Current measurement; Ducts; Electrodes; Insulation; Kinetic theory; Manufacturing; Power transformers;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 2002 Annual Report Conference on

Print_ISBN

0-7803-7502-5

Type

conf

DOI

10.1109/CEIDP.2002.1048765

Filename

1048765