Enhancing dielectric constant of transformer oils using multi-nanoparticles technique under thermal conditions

Thabet, Ahmed; Shaaban, S. A.; Allam, M

doi:10.1109/mepcon.2016.7836894

Cited by 9 publications

(7 citation statements)

References 9 publications

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“…Knowing the capacitance when there is only air in the sample port, the capacitance of the studied oil is measured by calculating the oil permittivity through Equation 2. From the literature, it is known that the permittivity of new transformer oils is around ε≈2.40 [16][17][18] , with oils that fall outside this value being oils that have been used or damaged. The oils analysed in this work vary from new oil to others in different states of conservation and use.…”

Section: Resultsmentioning

confidence: 99%

Novel Planar Capacitive Interdigital Multifinger (IDCM) Sensor for the Detection of the Ageing of Electrical Transformer Oil

Oliveira

Morais

Bessa

et al. 2020

Fine Chemical Engineering

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This work shows a planar interdigital sensor for rapid measurement of oils. The kit is characterised by the impedance meter, a Raspberry Pi3 and a sample port where the planar capacitive interdigital multifinger (IDCM) sensor is stored. For validation of this IDCM sensor, the data was compared with measurements performed by impedance spectroscopy (IS). The measurements show that the measured values of the new and used oils are very close, validating the IDCM sensor for fast oil measurements of oils in transformers and other devices.

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Section: Resultsmentioning

confidence: 99%

Novel Planar Capacitive Interdigital Multifinger (IDCM) Sensor for the Detection of the Ageing of Electrical Transformer Oil

Oliveira

Morais

Bessa

et al. 2020

Fine Chemical Engineering

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“…However, the relative permittivity pattern decreased linearly along with temperature and increased linearly when the nanoparticle volumetric concentration decreased. It is suggested that volumetric concentrations could contribute to the effectiveness of relative permittivity of nanofluids [127].…”

Section: Dielectric Propertiesmentioning

confidence: 99%

A Review on Oil-Based Nanofluid as Next-Generation Insulation for Transformer Application

Suhaimi

Rahman

Din

et al. 2020

Journal of Nanomaterials

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Due to the increasing demand on developing good insulation, several researchers have performed experimental studies to prove the effectiveness and capabilities of transformer oil. This is done by suspending nanosized solid particles in the oil (nanofluid) for transformer applications. In brief, this paper presents a compilation of research studies which is divided into three parts. Part I discuss the preparation of the nanofluid which involves different types of nanomaterials, the optimal amount of concentrations, and applicable synthesisation methods for producing stably suspended nanofluids. In Part II, the nanofluid’s performances including the electrical breakdown voltages, impulse tests, and thermal and dielectric behaviour are reviewed in depth and compared. Part III emphasizes the limitation of nanofluids. Most researchers have agreed that appropriate concentrations of nanomaterials and the preparation method for nanofluids mainly affect the performance of nanofluids especially in terms of electrical properties. Meanwhile, types of nanomaterials and base oil also play a vital role in producing nanofluids as a better alternative transformer oil. However, among a few researchers, there are concerns regarding the issue of agglomeration and inconsistencies of findings that need to be resolved. Therefore, a few aspects must be taken into consideration to produce the next generation of high heat dissipation insulation.

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“…Hence, some other researchers studied around improving electrical properties, dielectric properties and thermal efficiency of mineral and natural ester oil by suspending various types of nanoparticles. Instead, according to a few studies, nanoparticles have the capacity of trapping free electrons due to polarization, which slows down the formation of streamers in the presence of impurities in the oil, and thus increases the dielectric performance of the oil [2,3]. From an economic point of view, nanoparticles added into oil, known as nanofluids, could minimize the weight, size and costs of a transformer.…”

Section: Introductionmentioning

confidence: 99%

Optimum Electrical and Dielectric Performance of Multi-Walled Carbon Nanotubes Doped Disposed Transformer Oil

et al. 2020

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This paper intends to prepare a nanofluid sample by suspending Multi-walled Carbon Nanotubes (MWCNTs) at 0.005g/L concentration and analyze the behavior of electrical and dielectric properties based on the International Electrotechnical Commision test method. In order to validate the effectiveness of MWCNT nanofluid, alternating current breakdown voltage (BDV), negative polarity lightning impulse (LI), dielectric permittivity, dissipation factor (DF), DC resistivity and Raman structural measurement are executed accordingly. In the following, an analysis of the statistical distribution using the two-parameter Weibull distribution law of BDV and LI are evaluated at four experimental conditions to predict the probability of breakdown occurring at different percentages. Based on the observation, the MWCNT filler has a substantial effect in improving the BDV and LI characteristics of disposed mineral oil. The permittivity, DF and resistivity performance of MWCNT nanofluid from 25 °C to 90 °C also produces comparable and reliable performance as a fresh transformer oil. As for Raman structure, the revolution of transformer oil by doping MWCNT does not disrupt the original chemical structure of mineral oil. Hence, this study proves the improvement of the electrical and the behavior of dielectric properties and chemical structure of nanofluid, providing a huge contribution towards the development of insulating materials for transformer application.

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Enhancing dielectric constant of transformer oils using multi-nanoparticles technique under thermal conditions

Cited by 9 publications

References 9 publications

Novel Planar Capacitive Interdigital Multifinger (IDCM) Sensor for the Detection of the Ageing of Electrical Transformer Oil

Novel Planar Capacitive Interdigital Multifinger (IDCM) Sensor for the Detection of the Ageing of Electrical Transformer Oil

A Review on Oil-Based Nanofluid as Next-Generation Insulation for Transformer Application

Optimum Electrical and Dielectric Performance of Multi-Walled Carbon Nanotubes Doped Disposed Transformer Oil

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