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Review | Open Access

Eco-friendly gas insulating medium for next-generation SF6-free equipment

Yi Li1,2, Shuangshuang Tian1, Linlin Zhong3, Geng Chen4, Song Xiao2, Yann Cressault5, Yuwei Fu6, Yu Zheng2, Christophe Preve7, Zhaolun Cui8, Yin Zhang1, Fanchao Ye1, Daniel Piccoz7, Gang Wang7, Yalong Li1, Youping Tu4, Wenjun Zhou2, Ju Tang2, Xiaoxing Zhang1( )
Hubei Engineering Research Center for Safety Monitoring of New Energy and Power Grid Equipment, Hubei University of Technology, Wuhan 430068, China
School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China
School of Electrical Engineering, Southeast University, Nanjing 210096, China
State Key Laboratory of Alternate Electric Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China
LAPLACE (Laboratoire Plasma et Conversion d'Energie), Université de Toulouse, Toulouse 31013, France
Department of Electrical Engineering, Xi’an University of Technology, Xi’an 710048, China
Schneider Electric, Reuil-Malmaison 92500, France
School of Electric Power Engineering, South China University of Technology, Guangzhou 510006, China
Show Author Information

Abstract

Gas-insulated equipment (GIE) that utilizes the most potent greenhouse gas sulfur hexafluoride (SF6) as insulation and arc-quenching medium has been widely used in the power industry. Seeking eco-friendly insulating gas with advanced performance for next-generation SF6-free GIE is significant for the “net-zero” goal and sustainable development. In this paper, the utilization, emission, and reduction policies of SF6 around the world were summarized first. Then, we systematically reviewed the latest progress in comprehensive performance evaluation of eco-friendly insulating gas in terms of molecular design, dielectric insulation, arc-quenching, stability and decomposition, materials compatibility, biosafety, etc. Further, the representative applications of eco-friendly insulating gas in medium-voltage, high-voltage GIE as well as relevant maintenance-related technologies were highlighted. Accordingly, the existing challenges and future perspectives were proposed, presenting a roadmap to hopefully steer the development of eco-friendly insulating gas and GIE.

Keywords

Eco-friendly insulating gasnet-zerodielectric insulationarc-quenchingSF6-free gas-insulated equipment (GIE)

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iEnergy
Volume 2 Issue 1,
March 2023
Pages 14-42
DOI: 10.23919/IEN.2023.0001
Cite this article:
Li Y, Tian S, Zhong L, et al. Eco-friendly gas insulating medium for next-generation SF6-free equipment. iEnergy, 2023, 2(1): 14-42. https://doi.org/10.23919/IEN.2023.0001

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Received: 16 December 2022
Revised: 05 January 2023
Accepted: 15 January 2023
Published: 01 March 2023
© The author(s) 2023.

This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
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