Flashover dynamic model of polluted insulators under ac voltage

被引:75
作者
Dhahbi-Megriche, N [1 ]
Beroual, A [1 ]
机构
[1] Ecole Cent Lyon, Ctr Genie Elect Lyon, Lyon, France
关键词
D O I
10.1109/94.841822
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
This paper presents a dynamic model allowing the prediction of discharge activity leading to flashover of polluted insulators. It takes into account the instantaneous changes of the discharge (arc) parameters. For a given voltage, geometry and pollution severity, the model enables one to determine the following parameters: temporal evolution of the current, are resistance, propagation velocity, charge injection and flashover time lag. The flashover voltage characteristic as a function of the surface conductivity of insulators calculated by this model is quite satisfactory in contrast to the empirical and semi-empirical models reported in the literature. The leakage currents computed by our model are found to be in a good agreement with those measured in the laboratory.
引用
收藏
页码:283 / 289
页数:7
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