摘要详情

ID / 提交时间

171 / 2024-04-15 15:37:37

标题

INFLUENCE OF H2O AND O2 ON THE DECOMPOSITION CHARACTERISTICS OF C4F7N/CO2 MIXED GAS

关键字

WATER AND OXYGEN,REACTIVE FORCE FIELD,C4F7N/CO2,DECOMPOSITION RATE

主题及专题

1)Emerging HV Switching Technologies

状态

摘要录用

作者

Yu Di / Shanghai University of Electric Power

Zhousheng Zhang / Shanghai University of Electric Power

摘要

C₄F₇N/CO₂ gas mixture is widely considered as a potential replacement gas for SF₆ due to its excellent insulation and environment-friendly. However, the presence of gaseous impurities (such as micro-water and micro-oxygen) in actual operating conditions will result in different decomposition characteristics of the C₄F₇N/CO₂ mixture. In order to study the above problems, this paper comprehensively considers the possible micro-water and micro-oxygen environment in actual operation. Meanwhile, the type and content of decomposition products for 20%C₄F₇N-80%CO₂ mixture is simulated and calculated based on the reactive force field (ReaxFF) molecular dynamics. The results show that: H₂O can promote the decomposition of mixed gases, and the promoting effect of O₂ is weaker than H₂O.Furthermore, O₂ is found to inhibit the decomposition of H₂O. For the case that O₂ content is kept constant at 2%,the decomposition rate of C₄F₇N increased with the increase of H₂O content (2%, 4%, 6%, respectively).For another case that H₂O content was kept at 2%, the decomposition rate of C₄F₇N did not decrease significantly with the increase of O₂ content (2%, 4%, 6%, respectively). This indicates that H₂O mainly promotes the decomposition of C₄F₇N/CO₂, and O₂ has an inhibitory effect on the decomposition of C₄F₇N. This study provides theoretical support for the effect of H₂O and O₂ on the decomposition of C₄F₇N/CO₂.