Effect of ageing of monoesters and mineral oil on the propagation of creeping discharges

Jiosseu, Jean Lambert; Mengounou, Ghislain Mengata; Nkouetcha, Emeric Tchamdjio; Imano, Adolphe Moukengue

doi:10.1016/j.elstat.2023.103810

Cited by 7 publications

(3 citation statements)

References 36 publications

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“…The experimental setup is the same as that presented in the previous work [28–30]. It consists of a Marx generator (200 kV–1.25 kJ) which provides a standard negative and positive lightning pulse voltage (1.2/50 μs), a control box and a capacitive voltage divider.…”

Section: Methodsmentioning

confidence: 99%

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Improvement of the flashover threshold of TUK pressboard by using FeO₃‐based nanofluid of monoesters

Jiosseu,

Mengounou,

Tchamdjio Nkouetcha

et al. 2023

IET Nanodielectrics

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This article deals with the improvement of the dielectric properties of TUK cellulose paper by impregnation. The experiment was carried out using a nanofluid based on vegetable oil esters and iron nanoparticles (FeO3). The insulating liquids used are palm kernel oil methyl ester (PKOME) and castor oil methyl ester (COME). The evaluation of the improvement is based on the analysis of the flashover voltage of the creeping discharges produced on the immersed paper. The tests were carried out under a positive lightning impulse voltage and for two electrode configurations. The concentrations of nanoparticles used in the experiment are 0.10 wt.%, 0.15 wt.% and 0.20 wt.%. The experimental results show that the 0.10 wt.% concentration gives the best improvement for the two electrode configurations used. The improvements are 53% for the inclined tip and 56.90% for the vertical tip in the case of COME + FeO3. For PKOME + FeO3, the results are 59.90% and 64.60%, respectively, for the two configurations.

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Section: Methodsmentioning

confidence: 99%

“…The experimental setup is the same as that presented in the previous work [28][29][30] [24] and nanoparticles [25].…”

Section: Experimental Set-upmentioning

confidence: 99%

Improvement of the flashover threshold of TUK pressboard by using FeO₃‐based nanofluid of monoesters

Jiosseu,

Mengounou,

Tchamdjio Nkouetcha

et al. 2023

IET Nanodielectrics

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“…This work also shows that the results of the analysis of the propagation of discharges in the vegetable oils investigated are close to 97%. Another of these papers focuses on the impact of ageing of the solid/liquid insulation system on the propagation of creeping discharges 13 . The liquids investigated include palm kernel oil methyl esters and mineral oil.…”

Section: Introductionmentioning

confidence: 99%

Combined effect of lightning impulse voltage and temperature stress on the propagation of creeping discharge of oil-impregnated paper

Jiosseu,

Foumi Nkwengwa,

Mengata Mengounou

et al. 2024

Sci Rep

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This article presents the results of an experiment designed to study the impact of temperature on the characteristic parameters of creeping discharges. The insulating interfaces consist of a thermally enhanced cellulose surface immersed in mineral oil, palm kernel oil methyl ester (PKOME) and castor oil methyl ester (COME). The study was carried out under a standard negative lightning impulse voltage (1.2/50 μs). The article also presents the complete algorithms for calculating the maximum extension of the discharges, the ionisation rate and the charge produced by them. The results of the study show that temperature favors the propagation of discharges and the ionisation rate. It was observed that liquids with a higher dielectric constant and high electrical conductivity were more exposed to the impact of temperature. The results show ionisation increments of 0.973%/°C, 1.093%/°C and 1.076%/°C in mineral oil (MO), COME and PKOME respectively. The maximum extension of the discharges shows a linear evolution with the applied voltage and temperature but a non-linear increment with the temperature. As for the charge produced, it shows a constant increment with temperature and voltage in each liquid. These values are (5.839%/°C, 1.977%/kV), (6.047%/°C, 2.082%/kV) and (6.177%/°C, 2.113%/kV) respectively in MO, COME and PKOME.

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Comparison of negative streamer development in synthetic ester and mineral oil in a point-sphere gap divided by a pressboard barrier

Rózga¹,

Stuchala²,

Pasternak³

et al. 2023

Journal of Electrostatics

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Effect of ageing of monoesters and mineral oil on the propagation of creeping discharges

Cited by 7 publications

References 36 publications

Improvement of the flashover threshold of TUK pressboard by using FeO₃‐based nanofluid of monoesters

Improvement of the flashover threshold of TUK pressboard by using FeO₃‐based nanofluid of monoesters

Combined effect of lightning impulse voltage and temperature stress on the propagation of creeping discharge of oil-impregnated paper

Comparison of negative streamer development in synthetic ester and mineral oil in a point-sphere gap divided by a pressboard barrier

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Effect of ageing of monoesters and mineral oil on the propagation of creeping discharges

Cited by 7 publications

References 36 publications

Improvement of the flashover threshold of TUK pressboard by using FeO3‐based nanofluid of monoesters

Improvement of the flashover threshold of TUK pressboard by using FeO3‐based nanofluid of monoesters

Combined effect of lightning impulse voltage and temperature stress on the propagation of creeping discharge of oil-impregnated paper

Comparison of negative streamer development in synthetic ester and mineral oil in a point-sphere gap divided by a pressboard barrier

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Improvement of the flashover threshold of TUK pressboard by using FeO₃‐based nanofluid of monoesters

Improvement of the flashover threshold of TUK pressboard by using FeO₃‐based nanofluid of monoesters