Fabrication technique of permittivity graded materials (FGM) for disk-type solid insulator

摘要

For the electric field control, relaxation and optimization in a solid insulator of electric power apparatus, we have been investigating functionally graded materials (FGM) with spatial distribution of dielectric permittivity (εr). We have so far developed the fabrication and simulation techniques of FGM with a cylindrical shape for post-type solid insulator of gas insulated switchgears (GIS). In this paper, we extended our FGM techniques to the coaxial shape for disk-type solid insulator. We succeeded to fabricate and simulate FGM with εr-grading to lower permittivity (GLP-FGM) and with U-shape εr-distribution (U-FGM) along the radius of disk-type GIS spacer.