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Zhouming ZHANG 《等离子体科学和技术》2018,20(10):105405
This paper has researched the insulation characteristics of 10%c-C4F8/N2/CO2 mixtures under lightning impulse voltage by experiment. It is shown that the positive and negative lightning impulse breakdown voltages of 10%c-C4F8/N2/CO2 gas mixtures rise linearly as the electrode gap distance and gas pressure increase and under the same conditions, the positive lightning impulse breakdown voltage of the gas mixtures is always higher than the negative lightning impulse breakdown voltage. As the gas mixtures have a little higher liquefied temperature than SF6 and the comprehensive GWP is about 5% of SF6 , and the positive and negative lightning impulse breakdown voltages can both reach 60% of SF6 , 10%c-C4F8/N2/CO2 gas mixtures can be applied as insulation gas in electrical equipment such as C-GIS, GIT, GIL and so on. 相似文献
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为了寻找SF_6的替代气体,文中对极不均匀电场中的10%~30%CF_3I/CF_4混合气体在不同极间距(5~35 mm)和不同气压(0.1~0.3 MPa)下的工频击穿特性进行了实验研究。结果发现,CF_3I/CF_4混合气体的工频击穿电压随着极间距的增大而近似线性增大,但是其随气压升高和CF_3I体积分数的升高均表现出"驼峰"现象。与SF_6相比,CF_3I/CF_4混合气体的工频耐压水平在它的59%~120%之间。综合考虑,15%~20%CF_3I/CF_4混合气体可以作为SF_6替代气体在合适的电气设备中使用。 相似文献
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