Comparative analysis of the impact of dissolved decay products on the dielectric performances of natural monoesters and mineral oil for power transformers

Nkouetcha, Emeric Tchamdjio; Mengounou, Ghislain Mengata; Imano, Adolphe Moukengue

doi:10.1016/j.sciaf.2021.e00977

Cited by 8 publications

(2 citation statements)

References 22 publications

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“…However, in a study on the compatibility of vegetable oils as an insulating medium for power transformers, Stefan Tenbohlen 5 shows that the total AI in natural esters is much higher than in mineral oil. A similar result is reported in the work of Nkouetcha et al 6 who make a comparative analysis of this data in mineral oil, palm kernel oil methyl ester and castor oil methyl ester. This work shows that, even after a chemical treatment of these oils, the AI is greater than or equal to that of mineral oil.…”

Section: Introductionsupporting

confidence: 90%

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

Jiosseu

Jean-Bernard

Mengounou

et al. 2023

Sci Rep

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This article deals with a comparative study of the physicochemical and electrical properties of monoesters of castor oil compared with their counterparts based on FeO3 and ZnO nanoparticles. The results are also compared with those in the literature on triesters, and also with the recommendations of the IEEE C 57.14 standard. The data is analysed statistically using a goodness-of-fit test. The analysis of the viscosity data at 40 °C shows an increase in viscosity. For concentrations of 0.10 wt%, 0.15 wt% and 0.20 wt% these are respectively 5.4%, 9.69%, 12.9% for FeO3 NFs and 7.6%, 9.91% and 12.7% for ZnO NFs. For the same concentrations, the increase in acid number is respectively 3.2%, 2.9%, 2.5% for FeO3 samples and 3.18%, 2.0%, 1.2% for ZnO samples. For the same concentrations, the fire point shows an increment of 4%, 3% and 2% for FeO3 samples and a regression of 8.75%, 6.88% and 5.63% for ZnO samples. As for the breakdown voltage, for the same concentrations we observe respectively an increment of 43%, 27%, 34% for the FeO3. The results show an improvement on partial discharge inception voltage with FeO3 of 24%, 8.13% and 15.21% respectively for the concentrations 0.10 wt%, 0.15 wt% and 0.20 wt%.

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Section: Introductionsupporting

confidence: 90%

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

Jiosseu

Jean-Bernard

Mengounou

et al. 2023

Sci Rep

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“…The technique involves adding a basic catalyst such as potassium hydroxide (KOH) to the liquid and decanting for 24 h. The esters obtained are then dried at 80°C for 24 h [13,22]. Table 1 presents the physicochemical characteristics of T A B L E 1 Physicochemical characteristics of the insulating liquids used [23]. the insulating liquids used.…”

Section: Samples Preparationmentioning

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 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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Contribution to the use of palm kernel oil methyl esters as liquid bio-insulators in distribution transformers: Experimentation and simulation of heat transfer

Kamhoua,

Mengata Mengounou,

Monkam

et al. 2024

Results in Engineering

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Comparative analysis of the impact of dissolved decay products on the dielectric performances of natural monoesters and mineral oil for power transformers

Cited by 8 publications

References 22 publications

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

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

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

Contribution to the use of palm kernel oil methyl esters as liquid bio-insulators in distribution transformers: Experimentation and simulation of heat transfer

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Comparative analysis of the impact of dissolved decay products on the dielectric performances of natural monoesters and mineral oil for power transformers

Cited by 8 publications

References 22 publications

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

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

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

Contribution to the use of palm kernel oil methyl esters as liquid bio-insulators in distribution transformers: Experimentation and simulation of heat transfer

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