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Chen, Lujia; Kamarudin, Muhammad Saufi; Griffiths, Huw; Haddad, Abderrahmane (2016)
Publisher: IEEE
Languages: English
Types: Article
Subjects: TA
SF6 is widely used in modern transmission and distribution networks because of its outstanding dual qualities: arc quenching and dielectric insulation. As a gas medium, SF6 is chemically inert, non-toxic, and non-flammable, which makes possible the construction of compact SF6 switchgear. One major known disadvantage of the gas is that it has a global warming potential which is 23,900 times higher than CO2. This has led to research into alternative gases with a much lower environmental impact, and one of the emerging candidates is CF3I. The high boiling temperature of CF3I means that it has to be used as part of a mixture inside gas-insulated equipment. To carry out the investigation on CF3I, a scaled-down coaxial system that replicates the maximum electric field of a 400 kV GIL system was designed and fabricated. The insulation performances of CF3I/CO2 and CF3I/N2 gas mixtures were then examined by measuring the 50% breakdown voltage, U50, using a standard lightning impulse waveform (1.2/50) under absolute pressures of 1 to 4 bar. The experimental results show that CF3I gas mixtures have promising potential as an insulation medium for application in gasinsulated lines.
  • The results below are discovered through our pilot algorithms. Let us know how we are doing!

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    • L. Chen (M'13) obtained a B.Eng. (Hons) degree in Electrical & Electronic Engineering in 2012 and then a Ph.D. in High Voltage Engineering in 2015 from Cardiff University, UK. He is currently working on the characterisation of CF3I in a gas-insulated line (GIL) demonstrator. His research interests are concerned with the feasibility of replacing SF6 with an environmentally friendly insulation medium in gas-insulated equipment.
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