Title :
Negative corona discharges in SF6
Author :
Liu, Jianfen ; Raju, G. R Govinda
Author_Institution :
Dept. of Electr. Eng., Windsor Univ., Ont., Canada
Abstract :
Corona discharge in SF6 is analyzed avoiding the equilibrium assumption. This is accomplished by a Monte Carlo simulation of electrons, considering the ionization, attachment, and photoionization processes, and finding the solution to Poisson´s equation for the space charge field. The current pulses simulated at various voltages are found to have more than one peak. This agrees with experimental observation. The current lasts several nanoseconds depending on the voltage. The development of electron avalanches due to ionization and photoionization are displayed in great detail. The quenching of the electrons at later surges is due to space-charge field suppression
Keywords :
Monte Carlo methods; SF6 insulation; corona; electron avalanches; photoionisation; space charge; Monte Carlo simulation; Poisson´s equation; SF6; attachment; current pulses; electron avalanches; equilibrium assumption; ionization; negative corona discharges; photoionization processes; quenching; space charge field; Corona; Electrodes; Electrons; Ionization; Monte Carlo methods; Nonuniform electric fields; Permittivity; Poisson equations; Space charge;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1993. Annual Report., Conference on
Conference_Location :
Pocono Manor, PA
Print_ISBN :
0-7803-0966-9
DOI :
10.1109/CEIDP.1993.378949
