Experimental Study on the Partial Discharge Characteristics of Palm Oil and Coconut Oil Based Al2O3 Nanofluids in the Presence of Sodium Dodecyl Sulfate

Abstract

This experimental study aims to examine the partial discharge (PD) properties of palm oil and coconut oil (CO) based aluminum oxide (Al2O3) nanofluids with and without surfactants. The type of surfactant used in this study was sodium dodecyl sulfate (SDS). The volume concentrations range of Al2O3 dispersed in oil samples was varied from 0.001% to 0.05%. The ratio of surfactants to nanoparticles was set to 1:2. In total, two different types of refined, bleached and deodorized palm oil (RBDPO) and one type of CO were measured for PD. Mineral oil (MO) was also examined for comparison purpose. PDIV measurements for all samples were carried out based on rising voltage method whereby a needle-sphere electrode configuration with a gap distance of 50 mm was chosen in this study. Al2O3 improves the PDIVs of RBDPO, CO and MO whereby the highest improvements of PDIVs are 34%, 39.3% and 27%. The PD amplitude and repetition rate of RBDPO improve by 38% and 81% while for CO, it can increase up to 65% and 80% respectively. The improvement of PD amplitude and repetition rate for MO are 18% and 95%, regardless with and without SDS. Without SDS, the presence of Al2O3 could cause 26%, 75% and 65% reductions of the average emission of light signals for RBDPOA, RBDPOB and CO with the improvement of PD characteristics but both events do not correlate at the same volume concentration of Al2O3. On the other hand, the average emission of light signal levels of the oils increases with the introduction of SDS. The emission of light signal in MO does not correlate with the PD characteristics improvement either with or without SDS.

Electric partial discharges in biodegradable oil-based ferrofluids: A study on effects of magnetic field and nanoparticle concentration

“…The positive effect of nanoparticles on PD activity was described also in Ref. [ 13 ] where enhancement of PD inception voltage in natural ester (NE) due to the addition of Al 2 O 3 nanoparticles reached values up to 39.3 %. In another study by Sun et al [ 14 ], the PD inception voltage was enhanced by 13.4 % before and 23.8 % after accelerated ageing in mineral oil with TiO 2 nanoparticles.…”

Statistical analysis of the impact of FeO3 and ZnO nanoparticles on the physicochemical and dielectric performance of monoester-based nanofluids

“…This suggests that other important parameters need to be taken into account in this process. Indeed, using a surfactant, Mohamad et al 59 carried out a study on the impact of nanofluid stability on PDIV. Their work shows that nanofluids with greater stability have a much higher percentage increase in PDIV, and that the aggregation of nanoparticles in the liquid produces a drop in PDIV.…”

Breakdown Performance and Partial Discharge Development in Transformer Oil-Based Metal Carbide Nanofluids

“…Furthermore, the efficiency of the combination of oil-paper insulation is evaluated with the non-destructive PD test. Beyond that, defining the PD activity in dielectric fluids is very important to retain suitable kinds of NPs inside the liquid insulation to suppress the PD activity and therefore delay the aging process of the oil [43,44] 6b). The test cell consists of two plate electrodes with the gap between them set at 0.75 mm.…”