新型 SF₆替代气体全氟甲基乙烯基醚的绝缘性能研究

Sulfur hexafluoride（SF₆）gas，which is widely used in high-voltage power equipment，has a strong greenhouse effect. Driven by the goal of ‘double carbon’，it is an urgent task for the power industry to study new environmentally friendly SF₆ alternative gas. Firstly，170 potential alternative gases to SF₆ are screened by high-throughput virtual screening，and a potential insulating alternative gas database consisting of 19 compounds is set up. It is found that CF₃OCF=CF₂ gas has good comprehensive properties，high insulation strength，with boiling point about -22 ℃ and GWP is less than 1. Then，focusing on the insulation properties of CF₃OCF=CF₂ gas，the pulsed Townsend experiment and lightning impact breakdown experiment are performed. The experimental results show that the insulation strength of CF₃OCF=CF₂ gas is about 0.96~1.02 that of SF₆. Therefore，from the perspective of insulation performance of CF₃OCF=CF₂ gas，it has the potential to replace SF₆，which verifies the feasibility of the virtual screening method. The work in this paper has strongly promoted the theoretical exploration and innovative development of new environmentally friendly insulating gases.