Assessment of Individual and Multiple Nanoparticles on Electrical Insulation of Power Transformers Nanofluids

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

doi:10.1080/15325008.2019.1609624

Cited by 9 publications

(4 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The model can be further improvised in several directions. Recently, there is growing interest in the development of nanofluids [30,31]. Using the developed model, the effect of nano-particles on condition properties of oilimpregnated pressboard i.e.…”

Section: Discussionmentioning

confidence: 99%

Ageing of DC conduction in thermally aged oil‐impregnated pressboard

Haque

Dalai

Chatterjee

et al. 2021

IET Science Measure & Tech

View full text Add to dashboard Cite

Ageing of the conduction process in a dielectric allows a better understanding of the phenomena. Available literature shows that the DC conductivity of oil impregnated pressboard increases with applied electric stress, particularly above 40 °C. However, the reason for this conductivity behaviour is not well understood. This paper attempts to understand the conduction mechanism of oil‐pressboard insulation and the effect of thermal ageing on it. For this purpose, DC conductivity measurements have been performed on oil impregnated pressboard specimens with varied ageing status at the electric field range 1 kV mm−1–15 kV mm−1 at 40 °C temperature. After a critical analysis, a new electric field dependent non‐linear conduction model was developed based on charge injection and thermally assisted “hopping” of charge carriers from one site to another site to explain charge transport in oil‐pressboard. The developed model fitted well with the measured experimental values of conductivity. It was also observed that certain model parameters, that is charge carrier density, charge mobility and potential barrier for charge hopping are dependent on the ageing status of the insulation that clearly affects the conduction process.

show abstract

Section: Discussionmentioning

confidence: 99%

Ageing of DC conduction in thermally aged oil‐impregnated pressboard

Haque

Dalai

Chatterjee

et al. 2021

IET Science Measure & Tech

View full text Add to dashboard Cite

show abstract

“…Thabet et al [20] have compared the enhancement achieved in electrical conductivity for the TO modified by single and multiple NPs (SiO 2 , ZnO, TiO 2 , and graphite). The study was carried out at different concentration and temperature ranges.…”

Section: Literature Reviewmentioning

confidence: 99%

“…The increase in electrical conductivity can effectively reduce the NP relaxation time constant (the rate at which the NP can absorb the electrons from the ionized space). This will help in reducing the streamer propagation and rising the DS [20][21].…”

Section: Literature Reviewmentioning

confidence: 99%

Finite Element Based Comparative Analysis of Positive Streamers in Multi Dispersed Nanoparticle Based Transformer Oil

Bhatt

2021

Int. j. eng. technol. innov.

View full text Add to dashboard Cite

The dispersion of dissimilar nanoparticles (NPs) in transformer oil (TO) has a major impact on fast propagating positive streamers. This work investigates the positive streamer dynamics in TO modified by dispersing both Fe3O4 and Al2O3 NPs at a homogenous concentration. The hydrodynamic drift diffusion model of positive streamer evolution and propagation are solved using the commercial software package COMSOL Multiphysics. The impact of multiple NPs (MNPs) has been analysed for streamer propagation, electric field intensity, electron density, and space charge density of modified TO. MNPs successfully reduce streamer propagation velocity by 50%, 17%, and 37.5% comparing to pure oil, Fe3O4 based nanodielectric fluids (NDFs), and Al2O3 based NDFs, respectively. The spatial distribution of electron density reveals the loss of electrons from the ionization region until the saturation of NPs. A comparative study demonstrates that MNPs significantly alter the streamer dynamics and augment the dielectric strength of TO compared to individual NPs.

show abstract

“…Thabet et al [20] investigates on the impacts of individual and multi-nanoparticles on effective conductivity of transformer oils. Also, it has been investigated on the main effective factors of effective electrical conductivity for transformer oil nanofluids like; concentration of nanoparticles, applied electric field, and thermal conditions.…”

mentioning

confidence: 99%

Experimental Studies on Breakdown Strength of Transformer Oil Based Nanofluids: An Overview

Krishnan S.

2020

IJAR

View full text Add to dashboard Cite

The advent of nanotechnology opens up several research avenues. One of the promising outcomes of it is nanofluids. Remarkable research progress has been evidenced in recent years in this arena.Recently scientists have used nanoparticles as additives in transformer oils due to its enhanced thermophysical and excellent dielectric properties. This article portrays an overview of recentexperimental studies on the potentials of nanofluids as transformer oils. The effect of particle type and particle concentrations on the dielectric break down voltage and heat transfer characteristics is summarized.It has been observed that use of nanofluids could improve the efficiency of existing high voltage infrastructures with a low financial cost.

show abstract

Assessment of Individual and Multiple Nanoparticles on Electrical Insulation of Power Transformers Nanofluids

Cited by 9 publications

References 23 publications

Ageing of DC conduction in thermally aged oil‐impregnated pressboard

Ageing of DC conduction in thermally aged oil‐impregnated pressboard

Finite Element Based Comparative Analysis of Positive Streamers in Multi Dispersed Nanoparticle Based Transformer Oil

Experimental Studies on Breakdown Strength of Transformer Oil Based Nanofluids: An Overview

Contact Info

Product

Resources

About