Step Propagation Mechanism of Impulse Creepage Discharge in N2/SF6 Gas Mixtures
SF6 gas has been applied to the gas insulated power apparatus like gas insulated switchgears (GIS) and gas insulated transformers because of its excellent insulation performance and high reliability. However, SF6 gas has a high global warming potential and its consumption and emission are required to be reduced from the viewpoint of mitigating global warming by SF6 gas. Many studies have been carried out to develop novel insulating gases or gas mixtures alternative to SF6 gas1–3, while few studies have so far focused on creepage discharge characteristics on solid dielectrics in the alternative gases, which is important for insulation design of gas insulated power equipment.
KeywordsElectric Field Strength Streak Camera Solid Dielectric Streamer Propagation Streak Image
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