This paper formulates a new multi-nanoparticles technique for reducing positive streamer propagation in silicon and vegetable oils nanofluids; transformer oil nanofluids with multi-nanoparticles suspensions are blended to slow the
propagation of positive streamer more than using individual nanoparticles, hence the insulation qualities are improved and
the breakdown voltage of nanofluid is expanded. This study indicated the influence of nanoparticle radius, nanoparticles' polarization, the relative permittivity of oil, applied field, and the charge density of nanoparticles interface. It is deduced that transformer oil-based nanofluids with conductive individuals and multi-nanoparticles suspensions have considerably higher impacts on slowing positive streamer than non-conductive nanoparticles. A comparative study has demonstrated the magnitude of deposited charge and charging time as a result of using individual nanoparticles and multi-nanoparticles inside transformer oil.