Partial discharge characteristics of spherical metal particle in mineral oil and PFAE under AC voltage

Azmi, Kiasatina; Zuhairi, Ahmad; Ishak, Dahaman; Muhamad, Nor Asiah; Jamil, Mohamad Kamarol Mohd

doi:10.1109/tencon.2017.8228298

Cited by 3 publications

(1 citation statement)

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“…The oils were poured into the test cell first and allowed to stand for at least 15 min before application of the voltage. A wideband 50 Ω Impedance Matching Circuit (IMC) was used in this study to monitor the occurrences of discharges whereby it has the ability to match the load and source for maximum power transfer as well as to transform the impedances for PD measurement [ 36 , 37 , 38 ]. Next, voltage was applied to the cell, increasing at a constant rate of 1 kV/step ± 0.5 kV/step from 10 kV till a PD occurred with apparent charge equivalent to or higher than 100 pC.…”

Section: Methodsmentioning

confidence: 99%

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

et al. 2021

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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.

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Section: Methodsmentioning

confidence: 99%