Experimental characterisation of positive creeping discharges propagating along an insulating surface immersed in vegetable and mineral oil

Jiosseu, Jean Lambert; Mengounou, Ghislain Mengata; Imano, Adolphe Moukengue

doi:10.1016/j.elstat.2022.103753

Cited by 7 publications

(4 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Their results establish a direct link between the physico-chemical characteristics of the materials used for insulation and the propagation of creeping discharges. This result was confirmed by similar work carried out with solid insulators such as simple glass, hardened glass and porcelain 11 , 12 . The main aim of this work was to establish the relationship between the type of insulation system and the propagation of creeping discharges.…”

Section: Introductionsupporting

confidence: 80%

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

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionsupporting

confidence: 80%

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

Self Cite

View full text Add to dashboard Cite

show abstract

“…The maximum length of the discharge is taken as the distance from the tip to the end of the longest branch of the discharge. An illustrative description of the length calculation process is detailed in a previous articles [ 31 , 32 ]. Similarly, the total length of the discharges is obtained after binarisation of the original image.…”

Section: Methodsmentioning

confidence: 99%

Effect of the relaxation time of mineral oil and monoesters on the fractal dimension and mutual information of creeping discharges propagating along a pressboard

Jiosseu

Mengounou

Nkouetcha

et al. 2023

Heliyon

Self Cite

View full text Add to dashboard Cite

“…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%

“…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

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Experimental characterisation of positive creeping discharges propagating along an insulating surface immersed in vegetable and mineral oil

Cited by 7 publications

References 20 publications

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

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

Effect of the relaxation time of mineral oil and monoesters on the fractal dimension and mutual information of creeping discharges propagating along a pressboard

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

Contact Info

Product

Resources

About

Experimental characterisation of positive creeping discharges propagating along an insulating surface immersed in vegetable and mineral oil

Cited by 7 publications

References 20 publications

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

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

Effect of the relaxation time of mineral oil and monoesters on the fractal dimension and mutual information of creeping discharges propagating along a pressboard

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

Contact Info

Product

Resources

About

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