Improved method for measuring moisture content of mineral-oil-impregnated cellulose pressboard based on dielectric response
Sign Up to like & getrecommendations! Published in 2018 at "Cellulose"
DOI: 10.1007/s10570-018-1988-8
Abstract: The moisture content in transformer insulation pressboards is an important index to evaluate the insulation aging in the transformer. The dielectric-response technique based on frequency domain spectroscopy is used to accurately measure the moisture content… read more here.
Keywords: moisture; method; cellulose pressboard; oil impregnated ... See more keywords
Durable omniphobicity of oil-impregnated anodic aluminum oxide nanostructured surfaces.
Sign Up to like & getrecommendations! Published in 2019 at "Journal of colloid and interface science"
DOI: 10.1016/j.jcis.2019.06.068
Abstract: Recently, various types of porous surfaces have been demonstrated for lubricant (e.g., oil) impregnated omniphobic surfaces. However, the retention of the lubricating liquid within the porous layer and the omniphobic durability still remain challenges. Here,… read more here.
Keywords: anodic aluminum; aluminum oxide; durable omniphobicity; oil impregnated ... See more keywords
Effects of surface pore size on the tribological properties of oil-impregnated porous polyimide material
Sign Up to like & getrecommendations! Published in 2021 at "Wear"
DOI: 10.1016/j.wear.2021.204042
Abstract: Abstract The friction properties of oil-impregnated porous polyimide (PPI) material are closely related to surface pore size which is subject to changes during processing. Though the pores inside PPI, designed according to requirements of applications,… read more here.
Keywords: surface; oil impregnated; oil; surface pores ... See more keywords
Unique ice dendrite morphology on state-of-the-art oil-impregnated surfaces.
Sign Up to like & getrecommendations! Published in 2022 at "Proceedings of the National Academy of Sciences of the United States of America"
DOI: 10.1073/pnas.2214143120
Abstract: Due to its multifaceted impact in various applications, icing and ice dendrite growth has been the focus of numerous studies in the past. Dendrites on wetting (hydrophilic) and nonwetting (hydrophobic) surfaces are sharp, pointy, branching,… read more here.
Keywords: ice dendrite; oil; oil impregnated; morphology ... See more keywords
Modified α-Al2O3/oil-impregnated monomer casting nylon nanocomposite with both improved friction and mechanical properties
Sign Up to like & getrecommendations! Published in 2021 at "Polymer-Plastics Technology and Materials"
DOI: 10.1080/25740881.2021.1876880
Abstract: ABSTRACT For shock-absorbing and wear-resistant devices, there is an urgent need for monomer casting nylon (MC nylon) with excellent friction properties and mechanical properties simultaneously. Liquid lubricating oil is known to reduce friction effectively, but… read more here.
Keywords: friction; casting nylon; mechanical properties; monomer casting ... See more keywords
Origin of dielectric processes in aged oil impregnated paper
Sign Up to like & getrecommendations! Published in 2017 at "IEEE Transactions on Dielectrics and Electrical Insulation"
DOI: 10.1109/tdei.2017.006136
Abstract: Oil impregnated paper in power transformers deteriorates in long-term operation, which leads to the variations of its dielectric characteristics. This paper focuses on investigating the generation mechanism of the dielectric processes in oil impregnated paper… read more here.
Keywords: impregnated paper; paper; generation; dielectric processes ... See more keywords
Influence of moisture content on cellulose structure and breakdown strength of vegetable oil-impregnated paper
Sign Up to like & getrecommendations! Published in 2019 at "IEEE Transactions on Dielectrics and Electrical Insulation"
DOI: 10.1109/tdei.2019.007987
Abstract: The performance of oil-impregnated paper significantly affects the safety and reliability of transformers. Previous studies on water reducing the breakdown strength of oil-impregnated paper have been mainly due to increasing charge carriers and conductivity. However,… read more here.
Keywords: impregnated paper; breakdown strength; oil impregnated;
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
A Multinomial DGA Classifier for Incipient Fault Detection in Oil-Impregnated Power Transformers
Sign Up to like & getrecommendations! Published in 2021 at "Algorithms"
DOI: 10.3390/a14040128
Abstract: This study investigates the use of machine-learning approaches to interpret Dissolved Gas Analysis (DGA) data to find incipient faults early in oil-impregnated transformers. Transformers are critical pieces of equipment in transmitting and distributing electrical energy.… read more here.
Keywords: dga; multinomial dga; power; dga data ... See more keywords
Experimental Study on Breakdown Characteristics of Transformer Oil Influenced by Bubbles
Sign Up to like & getrecommendations! Published in 2018 at "Energies"
DOI: 10.3390/en11030634
Abstract: Bubbles will reduce the electric strength of transformer oil, and even result in the breakdown of the insulation. This paper has studied the breakdown voltages of transformer oil and oil-impregnated pressboard under alternating current (AC)… read more here.
Keywords: transformer oil; impregnated pressboard; plan; study breakdown ... See more keywords
Space charge modulated electrical breakdown of oil impregnated paper insulation subjected to AC-DC combined voltages
Sign Up to like & getrecommendations! Published in 2018 at "Energies"
DOI: 10.3390/en11061547
Abstract: Based on the existing acknowledgement that space charge modulates AC and DC breakdown of insulating materials, this investigation promotes the related investigation into the situations of more complex electrical stress, i.e., AC-DC combined voltages. Experimentally,… read more here.
Keywords: space; space charge; insulation; combined voltages ... See more keywords