Eco-friendly gas insulating medium for next-generation SF6 -free equipment
iEnergy(2023)
Abstract
Gas-insulated equipment (GIE) that utilizes the most potent greenhouse gas sulfur hexafluoride (SF
6
) 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 SF
6
-free GIE is significant for the “net-zero” goal and sustainable development. In this paper, the utilization, emission, and reduction policies of SF
6
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.
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Key words
Eco-friendly insulating gas,net-zero,dielectric insulation,arc-quenching,SF6-free gas-insulated equipment (GIE)
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