Experiments and Simulations on Influencing Factors of Pulsed Surface Flashover in Vacuum

Author

Chen, Y. ; Cheng, Y.H. ; Tang, J.P. ; Wu, K. ; Sun, Y. ; Shao, L. ; Chen, Q. ; Yin, W. ; Wang, Z.B. ; Zhou, J.B.

Author_Institution

State Key Lab. of Electrical Insulation and Power Equipment, Xi´´an Jiaotong University, Xi´´an 710049, Shaanxi, P.R.China. E-mail: chenyu@mail.xjtu.edu.cn

fYear

2007

fDate

8-13 July 2007

Firstpage

345

Lastpage

348

Abstract

The pulsed flashover strength of epoxy composite material in vacuum is related to the vacuum level, the electrode material, the relative dielectric constant, and the surface charging quantity of the sample. By using a high power single pulse generator (65ns rise time, 600ns half-height pulse width time and 10Â¿4Pa ultimate vacuum level), the vacuum surface flashover characteristics of epoxy and epoxy/Al2O3Â·3H2O composite material are studied by using the fingertype electrode with different materials (brass, duralumin and stainless steel). In the case of stainless steel-stainless steel fingertype electrode system, the flashover experiments under different vacuum level are investigated. Based on the ANSOFT Maxwell 3D software, E-field distribution of the electrode system, the effect of the relative dielectric constant of the sample on the maximum value of E-field magnitude and the role of surface charging of the sample on the maximum value of E-field magnitude are simulated and discussed.

Keywords

Building materials; Composite materials; Dielectric constant; Dielectric materials; Electrodes; Flashover; Pulse generation; Space vector pulse width modulation; Steel; Surface charging;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid Dielectrics, 2007. ICSD '07. IEEE International Conference on

Conference_Location

Winchester, UK

Print_ISBN

1-4244-0750-8

Electronic_ISBN

1-4244-0751-6

Type

conf

DOI

10.1109/ICSD.2007.4290823

Filename

4290823