Surface Charges on Cylindrical Polymeric Insulators
Artikel i vetenskaplig tidskrift, 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

Författare

Sarath Kumara

Chalmers, Material- och tillverkningsteknik, Högspänningsteknik

Imtiaz Rifanul Hoque

Chalmers, Material- och tillverkningsteknik, Högspänningsteknik

Shahid Alam

Chalmers, Material- och tillverkningsteknik, Högspänningsteknik

Yuriy Serdyuk

Chalmers, Material- och tillverkningsteknik, Högspänningsteknik

Stanislaw Gubanski

Chalmers, Material- och tillverkningsteknik, Högspänningsteknik

IEEE Transactions on Dielectrics and Electrical Insulation

1070-9878 (ISSN)

Vol. 19 1076-1083

Styrkeområden

Energi

Materialvetenskap

Ämneskategorier

Elektroteknik och elektronik

DOI

10.1109/TDEI.2012.6215115