Title :
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
fDate :
8/1/1997 12:00:00 AM
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;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
