Research and development of new eco-friendly insulation gases is the core technology direction of low carbon electrical equipment under the dual-carbon target. Researchers at home and abroad have conducted a large number of studies on new gas design screening

synthesis

gas integrated performance evaluation and regulation

and proposed a variety of alternative gases. However

the feasibility of most new gases being applied to equipment is still unknown. For this reason

this paper first compares the key performance of the reported new gases

then discusses the necessary performance indicators and their control methods that should be considered when the new gases are adapted to engineering application requirements. Then

trifluoromethylsulfonyl fluoride (CF3SO2F) gas is mainly reviewed

the existing research progress is summarized from the aspects of design screening

preparation technology

key performance

equipment test

and charged check

and the application potentials of CF3SO2F/N2 mixed gas to replace SF6 in 110 kV and above voltage grade GIS bus or GIL equipment are proposed. The conclusion has laid the foundation for research and development of CF3SO2F based eco-friendly equipment and its engineering application.