【摘要】 为了探讨SF6 /N2 混合气体代替纯SF6 气体作为气体绝缘开关装置 (GIS)绝缘介质的可行性 ,阐述了SF6 /N2 混合气体放电的基本参数 ,给出了Wieland插值的适用条件 ,并对SF6 /N2 混合气体在不同混合比、电压波形及气压下的放电特性进行了试验研究 .研究结果表明 :SF6 /N2 的电晕稳化作用比纯SF6 中的要强 ,当气压较高时 ,混合气体在高频率快速暂态过电压作用下的击穿电压比低频率作用下的要低 ,而且均匀场中混合气体的击穿电压与气压基本呈线性关线 .所以 ,在不改变现有GIS结构及尺寸的情况下 ,可增加混合气体的压强来保证GIS的绝缘强度 .更多还原

【Abstract】 To study the feasibility of the SF 6/N 2 gas mixture as the insulating dielectric in GIS to replace SF 6 gas, the discharge parameters are discussed, and the condition for the Wieland approximation to be applicable is provided.The discharge characteristics of SF 6/N 2 for different mixture ratios with different gas pressures under different applied voltage waveforms are studied. The results show that the corona stabilization in SF 6/N 2 mixtures is higher than that in SF 6, and the breakdown voltage under higher frequency VFTO are lower than that under lower frequency. The results also show the nearly linear relationship betwen the breakdown voltage and gas mixture pressure, so an increase of SF 6/N 2 pressure without changing the GIS dimension and structure can ensure its insulation strength .更多还原