Numerical design of HV insulators based on charge accumulation in vacuum

Author

Yamamoto, O. ; Hara, T. ; Takuma, T. ; Matsuura, H. ; Tanabe, Y. ; Konishi, T.

Author_Institution

Dept. of Electr. Eng., Kyoto Univ., Japan

Volume

4

Issue

4

fYear

1997

fDate

8/1/1997 12:00:00 AM

Firstpage

413

Lastpage

417

Abstract

A MCS (Monte Carlo simulation) method of charge accumulation based on the SEEA (secondary emission electron avalanche) mechanism is applied to the design of effective corrugation on an insulator surface used in vacuum. The electric field distribution on the cathode in the vicinity of a triple junction is analyzed taking the SEEA charge accumulation into account. Considerable relaxation of field strength takes places due to negative charge accumulation with appropriate corrugation. The flashover voltage obtained experimentally increases as the field strength decreases. The results of the MCS agree well with experiment

Keywords

Monte Carlo methods; alumina; ceramic insulators; electric fields; flashover; high-voltage engineering; secondary electron emission; surface charging; surface topography; vacuum insulation; Al₂O₃; Al₂O₃ insulators; HV insulators; Monte Carlo simulation; cathode triple junction; charge accumulation; cylindrical insulator; electric field distribution; field strength relaxation; flashover voltage; insulator surface corrugation; numerical design; rib length; secondary emission electron avalanche mechanism; surface charging; vacuum; Cathodes; Corrugated surfaces; Dielectrics and electrical insulation; Electron emission; Flashover; National electric code; Ribs; Shape; Surface charging; Voltage;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/94.625357

Filename

625357