Comparative study of AC and DC breakdown voltages in Jatropha methyl ester oil, mineral oil, and their mixtures

Béroual, Abderrahmane; Sitorus, Henry B. H.; Setiabudy, Rudy; Bismo, Setijo

doi:10.1109/tdei.2018.007219

Cited by 51 publications

(16 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Some authors recommend blended oil (80:20) for applications in transformers to achieve an effective techno-economical balance. Recently, the performance of mixtures of olive oil and Jatropha oil with mineral oil in different proportions has been investigated [63], [64]. The physicochemical, dielectric, and electric properties were reported for different ratios of mineral oil and olive oil.…”

Section: B Retrofilling and Miscibilitymentioning

confidence: 99%

Alternative Dielectric Fluids for Transformer Insulation System: Progress, Challenges, and Future Prospects

et al. 2019

View full text Add to dashboard Cite

Ester-based dielectric fluids have gained widespread popularity for applications in high voltage apparatus. Synthetic and natural esters have been subjected to research for decades vis-à-vis mineral insulating oils around the world. Although many researchers favor the application of ester fluids, utilities are still uncertain and application of these alternatives remains a challenge. The intent of this survey is to present recent research progress and highlight the state of the art of key aspects that should be emphasized in future research. The contemporary research scenarios pertaining to the performance of ester fluids versus mineral oils, miscibility, and retrofilling of insulating fluids are discussed. In addition, pre-breakdown phenomena, usage of esters in on-load tap changers, environmental and fire resistance properties, and use of esters in cold climates are also discussed. Importantly, challenges and future aspects that should be investigated to improve the existing knowledge of ester dielectric fluids for applications in transformer technology are highlighted.

show abstract

Section: B Retrofilling and Miscibilitymentioning

confidence: 99%

Alternative Dielectric Fluids for Transformer Insulation System: Progress, Challenges, and Future Prospects

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Considering the large consumption of insulating fluids in power transformers, using edible oils for this purpose will negatively impact the food crisis. Few studies have investigated the usage of nonedible oils as electrically insulating fluids [18][19][20]. In [18], Jatropha curcas methyl ester oil and its mixtures with mineral oil were investigated for BDV under AC and DC voltage application.…”

Section: Introductionmentioning

confidence: 99%

“…Few studies have investigated the usage of nonedible oils as electrically insulating fluids [18][19][20]. In [18], Jatropha curcas methyl ester oil and its mixtures with mineral oil were investigated for BDV under AC and DC voltage application. In [19] cottonseed oil (CSO) based nanofluids were developed using h-BN nanoparticles resulting in enhancements in both thermal and dielectric properties.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Effect of Sonication Time on Dispersion Stability, Dielectric Properties, and Heat Transfer of Graphene Based Green Nanofluids

et al. 2021

View full text Add to dashboard Cite

Natural ester oils are the current target of many industries and electrical utilities as electrically insulating fluids to replace the conventional mineral oils. However, previously investigated most natural ester oils are based on edible products, causing a negative impact on the food crisis. Accordingly, nonedible green nanofluids based on cottonseed oil have been targeted in the present study. Additive graphene nanoparticles (0.0015 wt%, 0.003 wt%, 0.006 wt%, and 0.01 wt%) along with surfactant sodium dodecylbenzene sulfonate (SDBS) were used (1:1) due to their promising impact on dielectric and thermal properties. Experimental methods introduced were including characterization of graphene and preparation of dielectric nanofluids (DNFs). The main concern for any nanofluid to be usable in transformer applications is its long-term stability. The effect of various ultrasonication period (10, 20, 30 and 60minute) on short-term stability of nanofluids was preliminary investigated by visual inspection, highest short-term stability was obtained at 30-min and 60-min. Considering short-term stability results, the two most stable samples were investigated and compared for long-term stability through Ultraviolet visible (UV-Vis) spectroscopy to find the suitable ultrasonication time. In addition, dielectric and thermal properties of these samples were investigated and compared. Physical mechanisms were discussed for the obtained enhancements considering the effect of ultrasonication period on the number of dispersed nanoparticle sheets per unit volume and the corresponding effect on dielectric and thermal properties.

show abstract

“…In 2018, Beroual et al [12] found both natural ester and synthetic ester mixed with mineral oil can increase the DC and AC breakdown voltages of mineral oil, and natural ester mixed oil has a larger increase extent. Dombek and Gielniak [13] studied the flash point and ignition point of synthetic ester-mineral oil mixed oil and found that flash point and ignition point of the mixed oil gradually increase with the addition of synthetic esters proportion.…”

Section: Introductionmentioning

confidence: 99%

Comparison of AC breakdown characteristics on insulation paper (pressboard) immersed by three‐element mixed insulation oil and mineral oil

et al. 2020

View full text Add to dashboard Cite

Insulation oil is an important dielectric in power devices, and many studies on mixed insulation oil have been conducted in recent years to improve the performance of insulation oils. To replace mineral oil directly, the authors previously developed a novel three-element mixed insulation oil successfully; the main parameters of which satisfy the IEC 60296-2012 standard for mineral oil. In the present study, the AC breakdown properties of insulation paper (pressboard) immersed by the new mixed oil and naphthenic mineral oil were compared. For both insulation oils, the increase in temperature cannot significantly reduce the breakdown strength of oil-immersed insulation paper (pressboard) at a low moisture content, and the increment of moisture content cannot reduce the breakdown voltage at a low temperature (25°C). The breakdown voltage decreases only when the two factors increase simultaneously. For the mixed and mineral oils, the AC breakdown voltage of oilimmersed paper (pressboard) with different thicknesses has significant difference. The mineral oil has a high breakdown voltage for the thin insulation paper, whereas the mixed oil has a high breakdown voltage when the thickness of the insulation paper (pressboard) exceeds 0.2 mm. This phenomenon is mainly caused by the breakdown field strength that varies with the increase of dielectric thickness and the different change trends of paper (pressboard) immersed with the mixed and the mineral oils. Moreover, the stack of thin multilayer insulation paper enables the mixed oil-immersed paper to have a higher breakdown strength than the mineral oil-immersed paper. For the AC breakdown voltage of oil-immersed pressboard with an oil-gap structure, the mixed oil is comprehensively superior to the mineral oil due to its larger relative permittivity.

show abstract

Comparative study of AC and DC breakdown voltages in Jatropha methyl ester oil, mineral oil, and their mixtures

Cited by 51 publications

References 9 publications

Alternative Dielectric Fluids for Transformer Insulation System: Progress, Challenges, and Future Prospects

Alternative Dielectric Fluids for Transformer Insulation System: Progress, Challenges, and Future Prospects

Investigation of the Effect of Sonication Time on Dispersion Stability, Dielectric Properties, and Heat Transfer of Graphene Based Green Nanofluids

Comparison of AC breakdown characteristics on insulation paper (pressboard) immersed by three‐element mixed insulation oil and mineral oil

Contact Info

Product

Resources

About