Surface Charges on Cylindrical Polymeric Insulators
Journal article, 2012

Distributions of charges are investigated on surfaces of polymeric cylindrical insulators that emerge due to dc corona discharges in surrounding air and by stressing with dc voltage. The studied model insulator consisted of a glass fiber reinforced epoxy core covered with a sheath of silicone rubber, terminated by metallic electrodes with rounded smooth edges. Surface potential distributions were measured 1 min after completing the charging process by means of a Kelvin electrostatic probe connected to an electrostatic voltmeter. The measured surface potential profiles were utilized to calculate corresponding charge density distributions. The obtained results demonstrated significant differences in the surface charge patterns for different charging conditions, which in turn may affect flashover withstand of the insulator.

Φ -matrix method

dc voltage

surface potential

surface charging

electric filed

electrostatic probe

Corona charging

Author

Sarath Kumara

Chalmers, Materials and Manufacturing Technology, High Voltage Engineering

Imtiaz Rifanul Hoque

Chalmers, Materials and Manufacturing Technology, High Voltage Engineering

Shahid Alam

Chalmers, Materials and Manufacturing Technology, High Voltage Engineering

Yuriy Serdyuk

Chalmers, Materials and Manufacturing Technology, High Voltage Engineering

Stanislaw Gubanski

Chalmers, Materials and Manufacturing Technology, High Voltage Engineering

IEEE Transactions on Dielectrics and Electrical Insulation

1070-9878 (ISSN)

Vol. 19 3 1076-1083

Areas of Advance

Energy

Materials Science

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1109/TDEI.2012.6215115

More information

Created

10/6/2017