Modification of insulating oils and oil-based titanium dioxide nanofluids for transformers: a review

Zhang, Zilong; Zuo, F.; Cai, Tong; Gai, X.Z.; Li, Wan; Lin, Haidan; Wang, Bolin; Zhang, Haifeng

doi:10.1039/d3cp02135a

Cited by 3 publications

(3 citation statements)

References 102 publications

(150 reference statements)

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“…FV interface = FV silastic + FV epoxy − FV all (3) where FV all is the total free volume, FV interface is the interface free volume, FV silastic is the silicone rubber sheath free volume, and FV epoxy is the epoxy free volume. Figure 13 shows the interface free volume.…”

Section: Free Volumementioning

confidence: 99%

“…As operating time increases, these insulators will gradually age and lose performance, which could result in interface breakdown, mandrel brittleness or fracture, and other accidents that could seriously jeopardize the grid's ability to operate safely and steadily [2]. Insulators must function safely and dependably in order to handle increasingly unstable circumstances and a range of dynamic operating conditions [3]. Furthermore, it is imperative to conduct a thorough investigation into the sheath-mandrel interface as it is responsible for up to 40%-50% of the various faults found in composite insulators [4].…”

Section: Introductionmentioning

confidence: 99%

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Temperature effects on the sheath-core bar interface of composite insulators: a molecular dynamics and DFT study

Xie,

Qiao,

Liu

et al. 2024

Modelling Simul. Mater. Sci. Eng.

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The functioning condition of composite insulators is greatly influenced bythe sheath-mandrel interface. In this work, the effects of temperature on thesheath-mandrel system are examined using molecular modeling, taking into accountboth density functional theory (DFT) and molecular dynamics (MD). The system'sinterfacial free volume, HOMO/LUMO, number of hydrogen bonds, bond order, center-of-mass distance, and other characteristics define its degradation mechanism. The findings demonstrate that elevated temperatures have the potential to increase theinterfacial free volume, the center-of-mass distance, and significantly reduce thenumber of hydrogen bonds. In addition, DFT simulations show that the bondingstrength and non-bonding forces between the interfaces weaken with increasingtemperature.High temperatures significantly boost the reactivity of the epoxy resinand silicone rubber chains, indicating that the system's response with some intruderswill be catalyzed by the temperature increase.This work looks at the temperaturedependence of the sheath-core bar interface degradation from a microscopicperspective, which is important for enhancing the overall performance of compositeinsulators.

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Section: Free Volumementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Temperature effects on the sheath-core bar interface of composite insulators: a molecular dynamics and DFT study

Xie,

Qiao,

Liu

et al. 2024

Modelling Simul. Mater. Sci. Eng.

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“…10 Consequently, the detection of these typical dissolved gases becomes crucial to ensure the uninterrupted, normal operation of power transformers. 11–13…”

Section: Introductionmentioning

confidence: 99%

Adsorption of C₂H₂ on heteroatom-decorated graphene

Cai,

Zhang,

Gai

et al. 2024

New J. Chem.

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An investigation of the Behaviour of Copper Electronic State Evolution on the Failure of Oil-paper Insulation Systems

Lin,

Guo,

Zhang

et al. 2024

J. Phys.: Conf. Ser.

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Copper, as one of the most hazardous metals to transformer insulation systems, has attracted a great deal of interest from scholars at home and abroad. Unfortunately, the specific type of copper that causes catalytic aging of oil-paper insulation is still controversial. Therefore, in this paper, the effect of the electronic state evolution of copper in different oxidation states on the aging performance of the insulation systems was investigated by characterization techniques and performance evaluation. Cu2O has a stronger catalytic oxidizing effect on insulation system than CuO. This study elucidates the electronic state evolution of different oxidation states of copper and its influence on the insulation performance, which lays a good foundation for the advancement of transformer fault warning technology.

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Modification of insulating oils and oil-based titanium dioxide nanofluids for transformers: a review

Abstract: In the last decade, oil-based titanium dioxide nanofluids (TiO2 NFs) have attracted great interests due to their unique insulating properties and excellent thermal performance making them potential applications in the...

Cited by 3 publications

References 102 publications

Temperature effects on the sheath-core bar interface of composite insulators: a molecular dynamics and DFT study

Temperature effects on the sheath-core bar interface of composite insulators: a molecular dynamics and DFT study

Adsorption of C₂H₂ on heteroatom-decorated graphene

An investigation of the Behaviour of Copper Electronic State Evolution on the Failure of Oil-paper Insulation Systems

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Modification of insulating oils and oil-based titanium dioxide nanofluids for transformers: a review

Abstract: In the last decade, oil-based titanium dioxide nanofluids (TiO2 NFs) have attracted great interests due to their unique insulating properties and excellent thermal performance making them potential applications in the...

Cited by 3 publications

References 102 publications

Temperature effects on the sheath-core bar interface of composite insulators: a molecular dynamics and DFT study

Temperature effects on the sheath-core bar interface of composite insulators: a molecular dynamics and DFT study

Adsorption of C2H2 on heteroatom-decorated graphene

An investigation of the Behaviour of Copper Electronic State Evolution on the Failure of Oil-paper Insulation Systems

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Adsorption of C₂H₂ on heteroatom-decorated graphene