Review on the Addition of Antioxidants and Nanoparticles to Natural Ester as an Alternative to Transformer Oil

The power transformer is a critical equipment in the transmission and distribution network that must be managed to ensure uninterrupted power service. Progress of reliable, ecologically harmless insulating oil for the transformer is a boundless exertion of the electrical industry. Current investigation is based on natural ester fluid, which displays exceptional dielectric presentation and environment friendly characteristics. To overcome the disadvantages of natural esters addition of antioxidants and nanoparticles to natural esters was introduced which showed an improved insulating properties in natural esters. Natural esters with addition of antioxidant and nanoparticles are the emerging trend as the potential replacement for the conventional mineral oil. This study details the overview of the effect of adding antioxidants and nanoparticles to the natural esters on the critical properties of natural esters. Natural esters studied in this work are sunflower oil (SFO), rice bran oil (RBO), neem oil (NO), castor oil (CO), mahua oil (MO), and coconut oil (CCO).