Investigation on enhancing breakdown voltages of transformer oil nanofluids using multi‐nanoparticles technique

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

doi:10.1049/iet-gtd.2017.1183

Cited by 40 publications

(22 citation statements)

References 19 publications

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“…These authors compared the behaviour of this nanofluid with the pure oil measuring power frequency breakdown voltage and relative permittivity. The breakdown voltage of nanofluids has also been measured by Thabet et al [57], nevertheless, in that work the insulation liquid was based on mineral oil and different nanoparticles (ZnO, MgO, Al 2 O 3 , TiO 2 , SiO 2 , LiTaO 3 ,F e 3 O 4 , graphite), as well as multi-nanoparticles collections, which were combination of two of the nanoparticles studied previously. These dielectric properties and other such as dissipation factor, dielectric constant or electrical resistivity have been studied by many authors [58,59], analysing the effect of different nanoparticles (CaCu 3 Ti 4 O 12 , TiO 2 , Al 2 O 3 ).…”

Section: Accelerated Thermal Ageing In Laboratorymentioning

confidence: 86%

Assessment of Dielectric Paper Degradation through Mechanical Characterisation

Fernández-Diego¹,

Fernández²,

Fernández³

et al. 2018

Simulation and Modelling of Electrical Insulation Weaknesses in Electrical Equipment

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Power transformers life is limited fundamentally by the insulation paper state, which can be analysed through different techniques such as furanic compound concentration, dissolved gases, methanol concentration, Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscope, refractive index of cellulose fibres, degree of polymerisation or tensile strength. The two last techniques provide the best way to evaluate mechanical resistance of insulation paper. This chapter describes briefly the most remarkable studies about post-mortem assessment and thermal ageing tests in which mechanical properties are some of the characteristics evaluated to determine paper degradation. This work also gathers the main relationships developed until now to relate different by-products generated during transformer operation with loss of paper mechanical properties. Finally, this chapter defines the future approaches, which could be used to study paper degradation.

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Section: Accelerated Thermal Ageing In Laboratorymentioning

confidence: 86%

Assessment of Dielectric Paper Degradation through Mechanical Characterisation

Fernández-Diego¹,

Fernández²,

Fernández³

et al. 2018

Simulation and Modelling of Electrical Insulation Weaknesses in Electrical Equipment

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“…Extensive research activity on NFs has been devoted over the last decade, as the addition of a few nano-sized particles in the medium not just strengthen the existing characteristics of fluid but also introduce new properties that enhance its applicability [28], [29]. Recently, many techniques have been employed to improve the dielectric property of transformer oil with the addition of NPs to improve quality and enhance the dielectric fluid [30]. The enhanced dielectric and thermal properties of NFs as compared to the corresponding base liquid insulation are the reason for its futuristic applications in power transformers.…”

Section: A Background Of Nanofluidmentioning

confidence: 99%

Dielectric Performance of Magneto-Nanofluids for Advancing Oil-Immersed Power Transformer

Hussain

Khan

et al. 2020

IEEE Access

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Recently, nanofluids are introduced in the power utilities for the dielectric performance enhancement of power transformer oil. The compactness and fault improvement of the power transformers has resulted in the necessity of next-generation insulating fluid with inflated dielectric properties. This paper investigates the dielectric performance of the novel ester oil-based magnetic nanofluids with different nanoparticles under different electric stress conditions. Two biodegradable fluids used as the base liquid for the experiment are synthetic ester oil and natural ester oil while three magnetic nanoparticles used to synthesize nanofluids are iron (II, III) oxide, cobalt (II, III) oxide, and iron phosphide. The concentrations of the nanoparticles are varied to optimize the characteristics of the prepared nanofluids. The dielectric breakdown and relative permittivity of the nanofluids have been experimentally investigated. Further, the breakdown predictions have been performed using Weibull statistical distribution-based regression analysis. The experimental results show the improvement in the characteristics of prepared nanofluids with the change in nanoparticle concentration as compared with the host fluids.

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“…The field of nanodielectrics is the future for the development of insulating oil with improved critical parameters that make it possible to operate for longer periods, with less cost and maintenance. In this paper, AC electrical breakdown voltage, lightning impulse tests for positive and negative polarity, thermal properties, and dielectric properties have been discussed further in the section below: [78], who studied the electrical breakdown behaviour of multinanoparticles (ZnO, TiO 2 , LiTaO 3 , Fe 3 O 4 , MgO, SiO 2 , and graphite) after dispersion in the transformer oil, found that nanoparticles accumulate as electron scavengers in nanofluids that hinder the occurrence of breakdown by making highly charged shallow traps to slow the fast-moving electron [79][80][81][82][83]. Based on the study, multinanoparticles are more efficient than individual nanoparticles for trapping electrons while increasing the amount of nanoparticles that was deposited in the transformer oil.…”

Section: Performance Of Nanofluidsmentioning

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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Investigation on enhancing breakdown voltages of transformer oil nanofluids using multi‐nanoparticles technique

Cited by 40 publications

References 19 publications

Assessment of Dielectric Paper Degradation through Mechanical Characterisation

Assessment of Dielectric Paper Degradation through Mechanical Characterisation

Dielectric Performance of Magneto-Nanofluids for Advancing Oil-Immersed Power Transformer

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

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