Review of the decomposition characteristics of eco‐friendly insulation gas

As one of the major concerns of climate change, identifying a proper eco‐friendly insulation gas for replacing sulphur hexafluoride (SF6) becomes a prominent research topic in recent years. c‐C4F8, CF3I, C5F10O, C6F12O and C4F7N are some potential alternatives that are proved to have excellent chara...

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Bibliographic Details
Published in:High voltage 2021-10, Vol.6 (5), p.733-749
Main Authors: Yang, Yuan, Gao, Keli, Ding, Lijian, Bi, Jiangang, Yuan, Shuai, Yan, Xianglian
Format: Article
Language:English
Subjects:
Atoms & subatomic particles
Carbon
Climate change
Decomposition
Electric power
Electricity distribution
Emissions
Energy
Fault diagnosis
Feasibility studies
Fluorine
gas insulated switchgear
global warming
Greenhouse gases
Insulation
Process controls
Product safety
Sulfur hexafluoride
Toxicity
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Summary:As one of the major concerns of climate change, identifying a proper eco‐friendly insulation gas for replacing sulphur hexafluoride (SF6) becomes a prominent research topic in recent years. c‐C4F8, CF3I, C5F10O, C6F12O and C4F7N are some potential alternatives that are proved to have excellent characteristics, including high insulation strengths and low Global Warming Potentials (GWPs). Beyond these key factors, the decomposition products of these alternatives are closely related to the gases' insulation performance, as well as the safety of operators and the compatibility with other materials. In addition, the type and content of decomposition products can be used for fault diagnosis. Therefore, a number of studies were carried out to reveal the decomposition mechanism of these alternative gases, and then to explore the gases' application feasibility and strategy. The recent advances obtained in these studies, including theoretical calculation methods, detection of gas decomposition products, decomposition mechanism are reviewed, and some perspectives for future works are proposed. It is concluded that the phenomenon of solid matter precipitation in c‐C4F8 and CF3I gas decomposition cannot be ignored and that more research is needed to reveal the influence of buffer gases, micro‐aerobic, micro‐water and other impurities on the gas decomposition process.
ISSN:2397-7264
2397-7264
DOI:10.1049/hve2.12125