Agglomeration Effect of Fe3O4 and TiO2 Based Nanofluids on Dielectric Strength of Liquid Insulation

Abstract

In this study, the effect of agglomeration nanofluid based on Fe3O4 and TiO2 on the AC dielectric strength of liquid insulation was investigated. The effect of surfactant added to stabilize the homogeneity of the solution was also studied. AC breakdown voltage of transformer oil-based nanofluids was investigated under agglomerated conditions for a day and 7 days according to IEC 60156. The results show that a certain amount of nanoparticles added to transformer oil can increase its dielectric strength. The highest breakdown voltage was observed if the concentration of Fe3O4-based nanofluid was about 0.003 % and about 0.016 % of TiO2-based nanofluid. Surfactant was added in both nanofluids.