高压电器2018，Vol.54Issue(5)：150-155,6.DOI:10.13296/j.1001-1609.hva.2018.05.024
极不均匀场下SF6/CF4混合气体中环氧树脂绝缘子沿面闪络特性研究
Study on Surface Flashover Characteristics of Epoxy Resin Insulator in SF6/CF4 Mixture Under Uneven Field
摘要
Abstract
Surface flashover characteristic of epoxy resin composite material in SF6/CF4 mixture were studied through experimental method, and the influence of several key parameters were analyzed, such as gas pressure, SF6 mix ratio and voltage polarity. During experiment, the needle-plate electrodes structure to simulate the extremely uneven electric field. The electrode spacing is 5 mm, and the testing pressure is 0. 10. 4 MPa. Results show that, when the mix ratio of SF6 in the mixed gas is 40％, the flashover voltage of epoxy resin insulator can reach over 60％ of the flashover voltage in SF6 with the same pressure. The synergistic effects in needle-plate electrodes system are of large distinguish difference under different polarity, which is much weaker under negative polarity than that under negative polarity. The flashover voltage shows significant polarity effect, but this effect reverses when the gas pressure increases. This reversal is because the distortions of positive and negative particles to the electric field are entirely different under different polarity voltages. Comprehensive environmental requirements and surface flashover characteristics, the results provide a potential SF6 alternative for GIS equipment.关键词
SF6/CF4混合气体/沿面闪络/直流/协同效应/极性效应Key words
SF6/CF4 mixture/flashover/direct current/synergistic effect/polarity reversal引用本文复制引用
翟芷萱,林莘,温苗,李晓龙,徐建源..极不均匀场下SF6/CF4混合气体中环氧树脂绝缘子沿面闪络特性研究[J].高压电器,2018,54(5):150-155,6.基金项目
国家自然科学基金(51777130).Project Supported by National Natural Science Foundation of China(51777130). （51777130）
