The dielectric breakdown strength of transformer oil based magnetic fluids: effect of magnetic field strength and exposure time

Study on the Anti-Aging Performance of Different Nano-Modified Natural Ester Insulating Oils Based on Molecular Dynamics

“…It was found that different nanomaterials have different effects on the performance of insulating oils. The authors of [ 6 ] prepared four nanofluids of Al 2 O 3 , Fe 3 O 4 , SiO 2 , and SiC for dielectric strength and thermal conductivity measurements; magnetic Fe 3 O 4 nanomaterials-modified mineral insulating oil can increase the dielectric loss factor of insulating oil [ 7 ]; the charge transfer rate and breakdown performance of semiconductor nanoparticle-modified insulating oils were improved [ 8 ]; when Fe 3 O 4 nanoparticles-modified plant insulating oil was used in [ 9 ], it was found that the viscosity of the modified oil increased continuously with the increase in the nanoparticle concentration, and the nanoparticles should be modified with surfactants or modified to improve the dispersion stability; experiments verified that nano-Al 2 O 3 -modified insulating oils are better than pure oils in terms of the thermal conductivity and viscosity of nano-transformer oil [ 10 ]; the authors of [ 11 ] conducted a systematic study on the physicochemical and dielectric properties of Fe 3 O 4 nano-plant insulating oil; the authors of [ 12 ] investigated the structural evolution of cement paste with nano-Fe 3 O 4 under a magnetic field and found the influence law of nano- Fe 3 O 4 particles on the structure formation of cement paste; the properties and relaxation times of Fe 3 O 4 , ZnO, Al 2 O 3 , and SiO 2 nanoparticle materials were summarized in [ 13 ]; the authors of [ 14 ] compared the effect of Fe 3 O 4 and Al 2 O 3 nanoparticles at different concentrations on the dielectric strength of transformer oil at various concentrations; regarding the study of the dielectric breakdown performance of transformer nano-modified insulating oil, the authors of [ 15 , 16 ], respectively, prepared Fe 2 O 3 magnetic nanofluid and T-oil-based magnetic fluid containing Mn-Zn ferrite nanoparticles for experiments, and they found that the presence of nanoparticles could significantly improve the dielectric breakdown performance of transformer insulating oil.…”