Adapting the IEEE C57.91 Standard for Underground Transformers With Natural Ester Insulating: Analysis, Thermal Modeling, and Life Expectancy Estimation
Sign Up to like & getrecommendations! Published in 2025 at "IEEE Access"
DOI: 10.1109/access.2025.3540592
Abstract: Transformers are among the most expensive components of the distribution networks in the Electric Power System, and one of the challenges for energy utilities is to assess the real operating conditions of these devices. Various… read more here.
Keywords: natural ester; c57 standard; standard; life expectancy ... See more keywords
Influence of Thermal Aging on Dielectric Properties of Natural Ester Oil-Impregnated Paper
Sign Up to like & getrecommendations! Published in 2023 at "IEEE Transactions on Dielectrics and Electrical Insulation"
DOI: 10.1109/tdei.2023.3268039
Abstract: Mineral oil is widely used as a dielectric liquid in high-voltage direct-current (HVDC) converter transformers because of its excellent electrical insulating and cooling properties. Due to the low biodegradability and high fire risk of mineral… read more here.
Keywords: ester oil; oil; oil impregnated; natural ester ... See more keywords
Experimental Research on Deterioration Effect of Transition Metals on Natural Ester
Sign Up to like & getrecommendations! Published in 2024 at "IEEE Transactions on Dielectrics and Electrical Insulation"
DOI: 10.1109/tdei.2023.3294367
Abstract: Natural ester insulating oil has the advantages of excellent electrical properties, a high ignition point, and is renewable and degradable. Transition metal materials, such as iron and copper used in transformer cores and windings, can… read more here.
Keywords: ester; degradation; natural ester; electrical properties ... See more keywords
Quantitative Estimation of the Gelling in Thermally Aged Natural Ester Dielectric Liquid
Sign Up to like & getrecommendations! Published in 2024 at "IEEE Transactions on Dielectrics and Electrical Insulation"
DOI: 10.1109/tdei.2023.3340632
Abstract: One of the major issues with natural ester fluid as transformer insulation is encountered in the oxidation process, which forms a thin gel layer due to polymerization. This latter can hinder the electrical and heat… read more here.
Keywords: iodine index; thermally aged; aged oil; natural ester ... See more keywords
Surge Current Withstand Capability of Natural Ester Oil: A Comparison to Gas-to-Liquid Transformer Oil
Sign Up to like & getrecommendations! Published in 2024 at "IEEE Transactions on Industry Applications"
DOI: 10.1109/tia.2024.3454232
Abstract: The basic electrical characteristics of a natural ester oil are experimentally investigated and compared to gas-to-liquid transformer oil with emphasis given to the endurance against surge events. An accelerated degradation test is conducted using a… read more here.
Keywords: ester oil; gas liquid; natural ester; oil ... See more keywords
Sensitive and Rapid Extraction-Free Detection of Furfural in Mineral and Natural Ester Oils by 4-ATP Modified SERS Substrate
Sign Up to like & getrecommendations! Published in 2025 at "IEEE Transactions on Instrumentation and Measurement"
DOI: 10.1109/tim.2025.3581665
Abstract: Furfural serves as a significant indicator of the aging process of oil-paper insulated transformer. However, the commonly used liquid chromatography (LC) method is cumbersome, time-consuming, and can only be analyzed in a laboratory. Surface-enhanced Raman… read more here.
Keywords: detection; natural ester; sers substrate; rapid extraction ... See more keywords
Effect of repeated electrical breakdowns on mineral and natural ester insulating oils
Sign Up to like & getrecommendations! Published in 2021 at "Bulletin of Electrical Engineering and Informatics"
DOI: 10.11591/eei.v10i6.3258
Abstract: Transformer insulating oils are exposed to repeated electrical discharge or breakdowns inside power transformers. Durability tests are conducted to analyze the ability of oil to resist decomposition due to such high electrical stresses. With the… read more here.
Keywords: breakdown voltage; repeated electrical; oil; natural ester ... See more keywords
Compatibility of transformer construction materials with mineral, natural ester, and synthetic ester insulating oils
Sign Up to like & getrecommendations! Published in 2025 at "Bulletin of Electrical Engineering and Informatics"
DOI: 10.11591/eei.v14i3.8391
Abstract: This paper presents the experimental findings on the compatibility of kraft paper strips and gasket materials (fluoroelastomer (FE) and nitrile butadiene rubber (NBR)) with mineral (MO), natural ester (NE), and synthetic ester (SE) insulating oils.… read more here.
Keywords: ester; kraft paper; natural ester; insulating oils ... See more keywords
Dielectric Properties and Fire Safety of Mineral Oil and Low-Viscosity Natural Ester Mixtures in Various Concentrations
Sign Up to like & getrecommendations! Published in 2023 at "Energies"
DOI: 10.3390/en16104195
Abstract: This paper presents the results of testing the electrical and fire properties of mineral oil and low-viscosity natural ester mixtures. Properties such as breakdown voltage, relative permeability, dispersion coefficient, conductivity, flash and burn point, and… read more here.
Keywords: low viscosity; oil; natural ester; mineral oil ... See more keywords
Study on the Anti-Aging Performance of Different Nano-Modified Natural Ester Insulating Oils Based on Molecular Dynamics
Sign Up to like & getrecommendations! Published in 2023 at "Nanomaterials"
DOI: 10.3390/nano13040653
Abstract: In order to investigate the anti-aging performance of nano-modified natural ester insulating oils, in this paper, two different types of nanoparticles are selected to modify insulating oils. We studied the microscopic mechanism of nano-modified models… read more here.
Keywords: anti aging; ester; natural ester; ester insulating ... See more keywords