Comparison of partial discharge behavior in mineral oil and PFAE under influence of spherical metal particle

Azmi, Kiasatina; Ishak, Dahaman; Jamil, Mohamad Kamarol Mohd; Zuhairi, Ahmad

doi:10.1109/ichveps.2017.8225902

Cited by 5 publications

(3 citation statements)

References 21 publications

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“…The experi-ment setup was depicted in Figure 1, while its realization at the laboratory was shown in Figure 2. The test circuit consisted of a high voltage transformer (1), a diode (2), a smoothing capacitor (3), two measuring resistors (4), a damping resistor (5), a grounding switch (6), a set of the test object (7), an arrester tube (8), a resistor 56 Ω (9), an oscilloscope (10), a digital measuring instrument (11), and a camera (12). The specification for each component of the high voltage generator can be seen in Table 1.…”

Section: Experimental Setup Of Oil Insulation Testing With Floating Metallic Particlesmentioning

confidence: 99%

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Effect of Floating Metallic Particles in Pre-Breakdown and Breakdown Characteristics of Oil Transformer under DC Voltage

et al. 2021

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Contaminants in transformer oil insulation can float when meeting several conditions. Then, the presence of floating contaminants affects the electrical characteristics of oil insulation. Therefore, the pre-breakdown (corona) and breakdown characteristics due to metallic floating particles in transformer oil insulation would be investigated. This test used DC high voltage stress. A 56 Ω resistor was connected to the oscilloscope to detect the corona currents. The camera was used to capture the images of corona light emission. In addition, the electric field between the electrode and particles was simulated. The variables were the particle size, including its shape, and the distance between the particles and the grounded electrode. The experimental results show that the average value of corona inception and breakdown was inversely proportional to the size of floating particles. The peak value of corona current was directly proportional to the particle size. The lowest breakdown voltage was found when the particle was close to the electrode, but they were not in contact.

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Section: Experimental Setup Of Oil Insulation Testing With Floating Metallic Particlesmentioning

confidence: 99%

“…The contamination can cause overstress to the oil insulation, which will initiate localized partial discharge (PD). Recently, several studies have been conducted to analyze PD activity in transformer oil [4][5][6][7]. Moreover, the effect of solid contaminant as a source of PD 2 of 13 is deeply investigated [3,8,9].…”

Section: Introductionmentioning

confidence: 99%

Effect of Floating Metallic Particles in Pre-Breakdown and Breakdown Characteristics of Oil Transformer under DC Voltage

et al. 2021

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“…PD is usually initiated at conductor-dielectric interfaces within solid or dielectric insulating fluids, bubbles within insulation fluids and particle contaminants in insulation fluids. Materials defect could also enhance local electric field and lead to the inception of PD [ 1 , 2 ]. Once the discharge is initiated, it can accelerate the degradation of insulation materials, allowing its propagation from local areas into bulk oils, leading to breakdowns [ 3 ].…”

Section: Introductionmentioning

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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Partial Discharge Activity Under Influence of Metal Particle Number in Mineral Oil and PFAE

Azmi

Ishak

Muhamad

et al. 2022

Lecture Notes in Electrical Engineering

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Comparison of partial discharge behavior in mineral oil and PFAE under influence of spherical metal particle

Cited by 5 publications

References 21 publications

Effect of Floating Metallic Particles in Pre-Breakdown and Breakdown Characteristics of Oil Transformer under DC Voltage

Effect of Floating Metallic Particles in Pre-Breakdown and Breakdown Characteristics of Oil Transformer under DC Voltage

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

Partial Discharge Activity Under Influence of Metal Particle Number in Mineral Oil and PFAE

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