Influence of Nanoparticles on the Degradation Processes of Ester-Based Transformer Insulation Systems

The use of nanofluids as dielectric liquids for transformer insulation has been widely investigated during the last decade. A number authors have performed extensive studies on produced from different types nanoparticles and base fluids, providing evidence their good properties. Nevertheless, nanodielectric fluids are still at research stage, they far being a solution that can be applied to real transformers. One aspects might clarified is compatibility with rest materials present in behavior throughout life equipment. This paper aging process cellulose impregnated an ester-based nanofluid compares it takes place when impregnation liquid natural ester. Accelerated experiments were performed, physical chemical characterization several analytical techniques was carried out. mechanical degradation studied terms tensile strength, evolution moisture oil monitored process. study completed FTIR XPS tests aimed studying changes experimental results suggest rate not significantly affected by presence nanoparticles. However, revealed reactions involved processes both differ. Several mechanisms proposed this work.