Electric Field Analysis of High Voltage Condenser
Bushing
Journal:
GRENZE International Journal of Engineering and Technology
Authors:
Anguraja.R, Pradipkumar Dixit
Volume:
3
Issue:
3
Grenze ID:
01.GIJET.3.3.78
Pages:
107-113
Abstract
Porcelain bushings are universally employed for power transformers. However,
non-condenser bushings are unsuitable for high voltage applications owing to their extreme
non-linearity in potential and electric field distribution. High voltage insulated bushings are
required to bring out the electrical energy through earthed barrier. Synthetic resin bonded
paper condenser bushing (SRBP) and oil impregnated paper (OIP) bushing are commonly
used bushings. These bushings have series of dielectric layers with conducting aluminum
foils in between each layer to improve the distribution of electric field. The present paper
discusses analysis of electric field distribution in a 145 kV OIP bushing with varying
number of foils and their thickness using finite element method. Simulation results show
that 9 foils, 4mm thickness each and 2mm gap between the foils is optimum for better
distribution of the field. The paper also discusses the experimental verification of the field
estimated through the simulation.