Natural Esters for Green Transformers: Challenges and Keys for Improved Serviceability

The service of mineral insulating oils for power transformer insulation and cooling aspects cannot be disavowed. However, the continued use is questionable due to environmental unfriendliness divestment from fossil fuels. This has provoked quest green alternative liquids high-voltage insulation. Natural esters are among remaining alternatives that renewable environmentally friendly. Regardless their technical merits, natural have some limitations slowing down total acceptance by owners utilities. Critical concerns include esters’ pour point, viscosity, oxidative stability, ionization resistance. In this work, state art “natural transformers” explored with aim potential improvements. sections article geared towards viewpoints on improving overall workability serviceability in applications. A comprehensive review existing literature achieved, based performance improvements ester using “additives” “chemical modification”. authors hope report may helpful as well influence progression