The Relationship Between the Physical, Chemical, and Functional Properties of Insulating Liquids

Casserly, Edward

doi:10.1109/icdl.2019.8796726

Cited by 3 publications

(1 citation statement)

References 10 publications

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“…It is believed that molecular structure plays a significant role in charge transport in dielectric liquids [ 16 ]. Knowledge of the chemical composition of insulating liquids is important to revealing the relationship between the compositions and the functional properties of the liquid [ 17 ]. However, the insulating oils usually consist of a variety of components mixed in specific proportions, whether they are part of paraffinic, iso-paraffinic, naphthenic, synthetic ester, or natural ester liquids.…”

Section: Introductionmentioning

confidence: 99%

Structure–Activity Relationship Models to Predict Properties of the Dielectric Fluids for Transformer Insulation System

Zhang,

Hou,

Wang

2024

IJMS

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Mineral oils and synthetic and natural esters are the predominant insulating liquids in electrical equipment. Structure–activity relationship models to predict the key properties of pure insulating liquids, including pulse breakdown strengths, AC breakdown voltages, dielectric constants, flash points, and kinematic viscosities, have been proposed for the first time. Dependence of the specific properties on the molecular structures has been illustrated quantitatively in terms of surface area, statistical total variance, and average deviation of positive and negative electrostatic potentials, as augmented by molecular weight, volume, and ovality. Moreover, the individual contribution of the functional groups to viscosity has been revealed by an additive approach. The predicted properties are in good agreement with the experimental data. The present theoretical work provides new insights on the development of novel dielectric fluids.

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Section: Introductionmentioning

confidence: 99%

Structure–Activity Relationship Models to Predict Properties of the Dielectric Fluids for Transformer Insulation System

Zhang,

Hou,

Wang

2024

IJMS

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Structure-Activity Relationship Models for Properties of the Dielectric Fluids

Zhang,

Hou,

Wang

2024

2024 IEEE Electrical Insulation Conference (EIC)

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Review on Gassing Tendency of Different Insulating Fluids towards Transformer Applications

et al. 2023

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This paper reports the critical reviews on the gassing tendency of different insulating fluids along with the precautionary measures to be considered during their fault diagnosis in transformer insulation. The experimental techniques and procedures for identifying the gassing due to electrical and thermal stress along with the stray gassing phenomenon has been elucidated. The different interpretation schemes used for determining the faults in transformers results in unexpected errors when the historical data relating to mineral oil is used for the other alternative fluids. Mineral oil and natural ester show a positive gassing tendency compared to synthetic ester which exhibit a negative gassing tendency. The stray gases are mostly due to breakage of C-C bonds under normal operating temperature of transformer. Among the different hydrocarbons, hydrogen and ethylene are more predominantly formed under lower temperatures. The silicone oil and ester fluids are more stable even under localised hot spots simulated observing a lesser gassing compared to the mineral oil. The impact of additives along with the oxygen and water content in the insulating fluids can lead to the stray gas’s causing confusion towards the identification of actual faults occurring in transformers. Furthermore, the regeneration of insulating fluids using different adsorbents reduces the gassing tendency depending on the number of cycles used for its reclamation.

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The Relationship Between the Physical, Chemical, and Functional Properties of Insulating Liquids

Cited by 3 publications

References 10 publications

Structure–Activity Relationship Models to Predict Properties of the Dielectric Fluids for Transformer Insulation System

Structure–Activity Relationship Models to Predict Properties of the Dielectric Fluids for Transformer Insulation System

Structure-Activity Relationship Models for Properties of the Dielectric Fluids

Review on Gassing Tendency of Different Insulating Fluids towards Transformer Applications

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