誘電率傾斜機能材料(ε-FGM)を用いたGISスペーサモデルの作製とSF₆ガス中絶縁破壊電圧の理論的推定

抄録

For the relaxation and optimization of electric field distribution around Gas insulated switchgear (GIS) spacers, the application of functionally graded materials (FGM) with spatial distribution of dielectric permittivity (ε) can be one of the effective solutions. In this paper, we fabricated the coaxial disk-type ε-FGM using SrTiO₃/SiO₂ particles by the centrifugal force method. We also proposed the coaxial cone-type ε-FGM by the flexible mixture casting method and evaluated its electric field reduction effect and breakdown voltage in SF₆ gas by the volume-time theory.