Dielectric Relaxation Spectroscopy of Modern Hybrid Insulation Systems

Abstract

The constant optimization of the properties of insulating materials, is currently highly topical, at a global scale, as it directly concerns the efficiency of the operation of electrical equipment. This study includes research on modern insulation systems based on hybrid and non-hybrid nanofluid-paper. Cellulose insulation is impregnated with Shell Diala S4 ZX-1 transformer oil, enriched with two types of Fe3O4 and C60 nanoparticles, with varying nanoparticle concentrations. Samples of insulating materials are subjected to analysis using the method of dielectric relaxation spectroscopy in the frequency domain. The results point to electrophysical processes, of a conductive and polarizing nature. The increasing concentration of Fullerene nanoparticles, causes a decrease in dielectric losses and reduces the influence of interfacial polarization and electric double layer polarization in the hybrid nanofluid-paper system. The loss spectra of the complex electric modulus are the same as the spectra of the complex permittivity in the liquid-paper system. The Havriliak-Negami function reveals the dominance of polarization losses over conduction losses in the studied frequency spectrum and their origin when an external alternating electric field is applied.