期刊名称：International Journal on Electrical Engineering and Informatics
印刷版ISSN：2085-6830
出版年度：2012
卷号：4
期号：2
出版社：School of Electrical Engineering and Informatics
摘要：SF6 gas insulated switchgear plays an important role in electric power networks all over the world due to its merits as compared to traditional air insulated switchgear.The mixtures composed of a strongly electronegative gases with high dielectric strength such as SF6 and two ordinary gases such as N2 and Air or CO2 and Air with a various fractional concentrations are used in this paper to reduce the gas price and liquefaction temperature. From this point of view, various types of gas mixtures are used inside gas insulated switchgear (GIS) to give a higher dielectric strength. In this paper, the Finite Elements Method (FEM) is used to evaluate the potential and electric field distributions on and around contaminating filamentary wire particle at two positions, first is resting on the earthed plate and second is hovering inside the gap. The effects of particle dimensions such as (length, radius) and gap spacing on the electric field values are also studied. The breakdown voltage calculations under uniform field in case of clean gap and non-uniform field in case of gap with particle contamination are studied. The effects of gas pressure, SF6 gas concentration in mixture, gap spacing and particle dimensions on the breakdown voltage calculations are also studied.
关键词：Mixtures; GIS; FEM; Electric Field; Breakdown Voltage.
