Partial Discharge Behaviour within Palm Oil-based Fe<sub>2</sub>O<sub>3</sub>Nanofluids under AC Voltage

Makmud, Mohamad Zul Hilmey; Illias, Hazlee Azil; Chee, Ching Yern

doi:10.1088/1757-899x/210/1/012034

Cited by 8 publications

(5 citation statements)

References 6 publications

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“…Therefore, it will trap the passing electrons and consequently lead to an enhancement of dielectric strength [11]. In spite of this, it has been reported that the addition of conductive nanoparticles in a certain amount reduces the dielectric strength of base oil [12][13][14]. When the number of nanoparticles is increased, the collision rate between the particles increases due to Brownian motion, but it appears as bridging between two conductors and could lead to breakdown [15].…”

Section: Introductionmentioning

confidence: 99%

Influence of Conductive and Semi-Conductive Nanoparticles on the Dielectric Response of Natural Ester-Based Nanofluid Insulation

et al. 2018

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Nowadays, studies of alternative liquid insulation in high voltage apparatus have become increasingly important due to higher concerns regarding safety, sustainable resources and environmentally friendly issues. To fulfil this demand, natural ester has been extensively studied and it can become a potential product to replace mineral oil in power transformers. In addition, the incorporation of nanoparticles has been remarkable in producing improved characteristics of insulating oil. Although much extensive research has been carried out, there is no general agreement on the influence on the dielectric response of base oil due to the addition of different amounts and conductivity types of nanoparticle concentrations. Therefore, in this work, a natural ester-based nanofluid was prepared by a two-step method using iron oxide (Fe 2 O 3 ) and titanium dioxide (TiO 2 ) as the conductive and semi-conductive nanoparticles, respectively. The concentration amount of each nanoparticle types was varied at 0.01, 0.1 and 1.0 g/L. The nanofluid samples were characterised by visual inspection, morphology and the dynamic light scattering (DLS) method before the dielectric response measurement was carried out for frequency-dependent spectroscopy (FDS), current-voltage (I-V), and dielectric breakdown (BD) strength. The results show that the dielectric spectra and I-V curves of nanofluid-based iron oxide increases with the increase of iron oxide nanoparticle loading, while for titanium dioxide, it exhibits a decreasing response. The dielectric BD strength is enhanced for both types of nanoparticles at 0.01 g/L concentration. However, the increasing amount of nanoparticles at 0.1 and 1.0 g/L led to a contrary dielectric BD response. Thus, the results indicate that the augmentation of conductive nanoparticles in the suspension can lead to overlapping mechanisms. Consequently, this reduces the BD strength compared to pristine materials during electron injection in high electric fields.

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Section: Introductionmentioning

confidence: 99%

Influence of Conductive and Semi-Conductive Nanoparticles on the Dielectric Response of Natural Ester-Based Nanofluid Insulation

et al. 2018

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“…5(a) shows the unsymmetrical PRPD pattern of the pure LDPE sample because the positive PD pulse count is higher than negative pulse count for A0 sample and it has the highest PD magnitude was recorded up to 1800 pC. This is due to the unbalanced electric field at the LDPE nanocomposites sample surface of the positive and negative cycles during PD measurements [9] [10]. In general, the samples containing treated nanosilica show better PD resistance which resulting in lower PD magnitude compared to the A0 sample.…”

Section: B Phase-resolved Partial Discharge Patternsmentioning

confidence: 99%

Partial Discharge and Breakdown Strength of Plasma Treated Nanosilica/LDPE Nanocomposites

Awang¹,

Ahmad²,

Abdul-Malek³

et al. 2018

EECSI

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Nanocomposites have been actively studied in recent years as an insulating material due to their excellent in electrical, mechanical and thermal properties. Even though, the addition of nanoparticles into polymer matrices showed better performance in relation to partial discharge (PD) and AC breakdown strength tests. However, the introduction of nanoparticles could lead to the formation of agglomeration of the fillers which may nullify the true capabilities of the composites. Therefore, silane coupling agent was introduced for surface functionalization treatment of the nano filler but among the issues associated are toxicity and complexity. In the present study, atmospheric pressure plasma is proposed to enhance the surface functionalization of the nano filler. This proposed method was used to treat the nanosilica (SiO2) surfaces to enhance the interfacial interaction between the host (LDPE) and nano filler. SiO2 nano filler was added into the LDPE at weight percentages of 1, 3 and 5%. The phase-resolved PD behaviour and Weibull analysis of AC breakdown strength of untreated and plasma-treated LDPE nanocomposites were measured to evaluate the performance of the samples. As results, the plasma treated LDPE nanocomposites experience apparent increments of the PD resistance and AC breakdown strength as compared to the untreated nanocomposites. It is implied that the plasma treatment of nanosilica has contributed to the enhancement of the filler dispersion and eventually reducing the agglomeration.

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“…However, the nonconductive magnetic nanoparticles are able to convert such fast-moving electrons into slow-moving negatively charged particles [16]. Some researchers studied that the addition of conductive nanoparticles such as oxonickel (Fe 2 NiO 4 ), ferric oxide (Fe 2 O 3 ), and copper at a certain amount of concentrations may reduce the dielectric strength of insulating oil [6,[17][18][19][20]. While zinc oxide (ZnO) [21] and copper oxide (CuO) [22] are categorized as classical semiconductive nanoparticles that are often used by researchers worldwide, they are also trusted as the main contributor to the enhancement of transformer oil performance [23,24].…”

Section: Nanomaterialsmentioning

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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Partial Discharge Behaviour within Palm Oil-based Fe₂O₃Nanofluids under AC Voltage

Cited by 8 publications

References 6 publications

Influence of Conductive and Semi-Conductive Nanoparticles on the Dielectric Response of Natural Ester-Based Nanofluid Insulation

Influence of Conductive and Semi-Conductive Nanoparticles on the Dielectric Response of Natural Ester-Based Nanofluid Insulation

Partial Discharge and Breakdown Strength of Plasma Treated Nanosilica/LDPE Nanocomposites

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

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Partial Discharge Behaviour within Palm Oil-based Fe2O3Nanofluids under AC Voltage

Cited by 8 publications

References 6 publications

Influence of Conductive and Semi-Conductive Nanoparticles on the Dielectric Response of Natural Ester-Based Nanofluid Insulation

Influence of Conductive and Semi-Conductive Nanoparticles on the Dielectric Response of Natural Ester-Based Nanofluid Insulation

Partial Discharge and Breakdown Strength of Plasma Treated Nanosilica/LDPE Nanocomposites

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

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Partial Discharge Behaviour within Palm Oil-based Fe₂O₃Nanofluids under AC Voltage