Study On The Mechanism Affecting The Stability Of Vegetable Oil Modified By Different Nanoparticles

Due to the influence of mineral oil extraction and leakage,the ecological environment is increasingly damaged.As a sustainable resource,vegetable insulating oil meets the strategic demand of power grid transformation to green low-carbon energy and has a broad application prospect in the future.Compared with traditional transformer oil,vegetable insulating oil has the characteristics of wide source,no pollution and high temperature resistance,but its insulation performance is still inadequate.The current application of nano-modification methods in liquid dielectric provides an effective way to improve the insulation performance of vegetable oil.Firstly,in order to study the effect of different nanoparticles on plant insulating oil,a preliminary study was conducted using molecular simulation technique.nanoparticles can effectively reduce the diffusion behavior of temperature on plant insulating oil molecules.As the temperature increases the inhibitory effect of nanoparticles on water molecules in vegetable oil gradually decreases Al2O3 has the most pronounced effect.Further,from the test results,it can also be seen that the modification effect of different nanoparticles varies as the concentration of nanoparticles in the oil increases,and the effect of nanoparticles modifying vegetable insulating oil at a concentration of 0.001%is considered to be more appropriate.All three materials have significant effect on modified vegetable oil to some extent,but different materials have different effects on different indexes.At the concentration of 0.001%,metal nano Fe3O4 shows more obvious effects on electrical properties and acid value reduction,and can improve the insulating properties of insulating grease more effectively;insulating nano Al2O3 has stronger effects on inhibiting the moisture of insulating oil The insulating nano Al2O3 has a stronger advantage in inhibiting the moisture of the insulating oil.In the electrical and physicochemical properties of the modified vegetable insulating oil,the modification effect of TiO2 nanoparticles is in the middle,and the insulating nanoparticles are relatively weak.In order to study the nano-modification effect under different temperature conditions,the nano-modified oil showed superior performance with the increase of temperature.When the temperature increased to 130℃ on the sixth day of aging,the fluctuation of common vegetable oil was relatively large,and the samples were in a stable state for aging time more than 6 days.The nano-modified vegetable insulating oil showed a more stable effect and the electrical performance was greatly improved.In summary,the extremely easy oxidation of vegetable insulating oil poses a serious threat to the long-term stable use of oil-immersed electrical equipment.The research content of this paper is to modify the long-term stability of vegetable insulating oil and effectively improve the insulation stability of vegetable insulating oil,which is important to improve the long-term stable operation of the equipment,etc.