Partial Discharge Behavior of Potential Green Alternative Nanomodified Pongamia Oil for Transformer

The potential utilization of Pongamia oil (PO)-based nanofluid (NF) as an insulating material for electrical purposes is examined in this study through an analysis of its partial discharge (PD) characteristics. The experiments involve testing modified with Fe3O4, TiO2, and ZnO nanoparticles (NPs) PO at varying mass fractions 0.1%, 0.2%, and 0.3%, utilizing different electrode configurations to generate PDs in the form of corona, internal, and surface discharges. The dependence of PD inception voltage (PDIV) on electrode geometry is investigated. In addition, phase-resolved PD (PRPD) pattern analysis under different conditions is carried out to gain insights into the real-time impact of element geometry on PD occurrences. With a focus on comprehending the effect of the nanofiller volume fraction in PO, the Weibull statistical technique is used to evaluate PD characteristic values such as scale and shape parameters, repetition rate, and skewness. The results of the experiments showed how significantly Fe3O4, TiO2, and ZnO NPs added to PO affect PD properties. It is noted from the experiments that the Fe3O4 NPs blended PO-based NFs recorded lesser PD activities than the TiO2 and ZnO NPs blended PO-based NFs.