Investigation of critical properties of the highly mono-unsaturated natural esters with nanocomposites

Over the past ten decades the power transformers insulation mainly depends on the insulating fluid which is derived from the mineral oil and synthetic oil. But these oils are not environmentally friendly due to their biodegradability behavior. And also the availability of mineral oil will meet its extinction in the future. There are several researches going on in the properties of natural esters which are the probable alternative for the Mineral oil. This work is based on the natural insulating fluid selection for the power transformers insulation by finding their critical properties and checks their properties with the addition of suitable mass function of Nanocomposites. Mustard oil (MO), Rice bran oil (RBO) and Sunflower oil (SFO) is taken as the samples according to their Monounsaturated fatty acid (MUFA) composition for thermal aging process. They are categorized as High level, Medium level and Low level MUFA composition in the oil. This work has been carried out in the laboratory which results as the Mustard oil which is highly monounsaturated in nature shows better performance than the other two oils after thermally heating the oil for 60 hours. By blending the inorganic compounds like silica and zinc oxide Nano particles into the oils there is considerable increment in the breakdown voltage. The silica plays a dominant role in the breakdown voltage increment of the rice bran oil and sunflower oil.