Progression of Positive Corona on Cylindrical Insulating Surfaces Part II: Effects of Profile on Corona

Author

Allen, N.L. ; Tan, B.H. ; Rodrigo, H.

Author_Institution

Univ. of Manchester Inst. of Sci. & Technol., Manchester

Volume

15

Issue

2

fYear

2008

fDate

4/1/2008 12:00:00 AM

Firstpage

390

Lastpage

398

Abstract

Characteristics of corona discharges over insulating surfaces are described. Two insulating materials, PTFE and porcelain are compared and contrasted using identical insulator surface profiles and dimensions and identical impulse voltage waveforms. The insulators were in the form of right cylinders and of similar shape but with a single shed, of practical dimensions added. Properties studied include the inception conditions, spatial development, light emission and changes in corona pattern. Results are discussed in terms of the relative permittivity of the materials, the surface profile and the physical effects of the surface upon corona properties.

Keywords

ceramic insulation; corona; permittivity; porcelain; PTFE; corona discharges; cylindrical insulating surfaces; impulse voltage waveforms; insulating materials; porcelain; positive corona; relative permittivity; spatial development; Breakdown voltage; Corona; Dielectrics and electrical insulation; Electrodes; Materials science and technology; Pollution measurement; Porcelain; Surface contamination; Surface discharges; Surface waves;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/TDEI.2008.4483457

Filename

4483457