广东电力2026，Vol.39Issue(4)：118-127,10.DOI:10.3969/j.issn.1007-290X.2026.04.011
C4F7N-CO2-O2三元环保混合气体电子群参数研究
Study on Electron Swarm Parameters of C4F7N-CO2-O2 Ternary Environmentally Friendly Mixed Gas
摘要
Abstract
Sulfur hexafluoride(SF6)has become the mainstream insulating medium for medium and high-voltage electrical equipment due to its excellent insulating and arc-extinguishing properties,yet it is in urgent need of replacement because of its strong greenhouse effect characteristics.Heptafluoro-isobutyronitrile(C4F7N),as a highly potential new eco-friendly insulating gas,has become a research hotspot by virtue of its superior electrical performance and low environmental harm.However,existing studies mostly focus on its binary mixture systems with a single buffer gas,and the research on electron swarm parameters of the C4F7N-CO2-O2 ternary mixture gas remains a blank which restricts the plasma simulation and engineering application of this system.Therefore,based on the test method combining the high-precision pulsed Townsend(PT)experimental platform with physical model analysis,this paper carries out experimental verification on the measurement of electron swarm parameters for C4 F7 N-CO2-O2 ternary mixture gases with different ratios under the pressure of 200 Pa.The effective ionization rate coefficients,electron drift velocities and density-normalized longitudinal diffusion coefficients of the mixture gases are obtained,the critical reduced breakdown field strengths of the mixture gases with different ratios are determined and the synergistic effects between C4F7N and CO2-O2 buffer gases are analyzed,providing essential data for C4F7N's engineering applications.关键词
脉冲汤逊实验/电子群参数/C4F7N/临界击穿场强/协同效应Key words
pulsed Townsend experiment/electron swarm parameters/C4F7N/critical reduced breakdown field strength/synergistic effect分类
信息技术与安全科学引用本文复制引用
孙东伟,刘沛琼,唐念,李智,张博雅,李兴文..C4F7N-CO2-O2三元环保混合气体电子群参数研究[J].广东电力,2026,39(4):118-127,10.基金项目
中国南方电网有限责任公司科技项目(GDKJXM20231006) （GDKJXM20231006）
