Title :
A model for calculating the field distribution of polluted post insulators during flashovers
Author :
Alame, N. ; Shihab, S.
Author_Institution :
Dept. of Electr. & Manuf. Syst. Eng., R. Melbourne Inst. of Technol., Vic., Australia
Abstract :
A model has been developed for calculating the field distribution of polluted post insulators during flashover under AC voltage. The field distribution is calculated with an efficient finite-element method and verified by measurement. The effect of the field pattern on the propagation of local arc is analyzed and a modified mechanism of pollution flashover process is presented. This takes into account not only the tangential electric field component but also the contribution of the normal field component to the flashover process. The potential use of the model for analyzing the pollution performance of other high-voltage power equipment such as bushings, surge arresters, and current transformers is discussed in the light of the results obtained
Keywords :
air pollution; finite element analysis; flashover; insulators; AC voltage; bushings; current transformers; field distribution; field pattern; finite-element method; flashovers; local arc; normal field component; polluted post insulators; pollution performance; surge arresters; tangential electric field component; Electric fields; Finite element methods; Flashover; Insulation; Insulators; Pattern analysis; Performance analysis; Pollution measurement; Urban pollution; Voltage;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1992. Annual Report. Conference on
Conference_Location :
Victoria, BC
Print_ISBN :
0-7803-0565-5
DOI :
10.1109/CEIDP.1992.283195
