Relevant bibliographies by topics / Natural ester insulating oil

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Natural ester insulating oil'

Author: Grafiati
Published: 5 June 2025
Last updated: 1 August 2025

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Journal articles on the topic "Natural ester insulating oil"

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Nadolny, Zbigniew. "Evaluation of Thermal Properties of Various Insulating Liquids Used in Power Transformers." Energies 17, no. 12 (2024): 3037. http://dx.doi.org/10.3390/en17123037.

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This article is a summary of many years of work by the author, in which the thermal properties of various types of insulating liquids, used in power transformers, were evaluated. Recently, esters have been displacing mineral oil. There is a common view that mineral oil has better thermal properties than esters. This claim is supported by comparative results of tests of both materials as a liquid only filling the remaining volume of the transformer. The effect of the type of liquid on the thermal properties of the paper–oil insulation has not been analyzed so far. On this basis, the conclusions
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ZOU, PING, JIAN LI, CAI-XIN SUN, ZHAO-TAO ZHANG, and RUI-JIN LIAO. "DIELECTRIC PROPERTIES AND ELECTRODYNAMIC PROCESS OF NATURAL ESTER-BASED INSULATING NANOFLUID." Modern Physics Letters B 25, no. 25 (2011): 2021–31. http://dx.doi.org/10.1142/s0217984911027285.

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Natural ester is currently used as an insulating oil and coolant for medium-power transformers. The biodegradability of insulating natural ester makes it a preferable insulation liquid to mineral oils. In this work, Fe 3 O 4 nanoparticles were used along with oleic acid to improve the performance of insulating natural ester. The micro-morphology of Fe 3 O 4 nanoparticles before and after surface modification was observed through transmission electron microscopy. Attenuated total reflection-Fourier transform infrared spectroscopy, thermal gravimetric analysis, and differential thermal analysis
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Lyutikova, M. N., S. M. Korobeynikov, and A. A. Konovalov. "Electrophysical properties of mixtures of mineral oil and synthetic ester dielectric liquid." Safety and Reliability of Power Industry 14, no. 2 (2021): 132–41. http://dx.doi.org/10.24223/1999-5555-2021-14-2-132-141.

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Power transformers are key equipment in power generation, transmission, and distribution systems. The reliability of power transformers is based on the performance of the insulation system, which includes solid cellulose insulation and a liquid dielectric. Modern power engineering requires liquid insulation to have excellent insulating properties, high fire resistance, and biodegradability. Mineral oil that has been in use for over 100 years does not meet certain requirements. Therefore, various methods of enhancing the insulating properties of the oil are currently being considered, including
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Münster, Tobias, Peter Werle, Kai Hämel, and Jörg Preusel. "Thermally Accelerated Aging of Insulation Paper for Transformers with Different Insulating Liquids." Energies 14, no. 11 (2021): 3036. http://dx.doi.org/10.3390/en14113036.

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The article presents issues related to the aging behavior of oil-paper insulations in transformers using different oil- and ester-based insulating fluids. Despite numerous conducted studies on the subject of oil-paper aging, the use of new insulating fluids is creating open questions. In addition, new liquids such as synthetic and natural esters, as well as oil of the newest generation, are being used. Furthermore, there is still little research on the formation of aging markers with this form of the dielectric. For this reason, in this contribution, oil-paper insulations with mineral oil-base
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Maneerot, Sakda, Norasage Pattanadech, Yannaphol Kittikhuntharadol, Phethai Nimsanong, and Chanin Bunlaksananusorn. "Polarization and Conduction Characteristics of Mineral Oil and Natural Ester Mixed with Nanoparticles." Advances in Materials Science and Engineering 2022 (March 19, 2022): 1–12. http://dx.doi.org/10.1155/2022/9225170.

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Mineral oil (MO) has been widely used in transformers because of its reasonable price and acceptable properties. Currently, alternative liquid insulations have been proposed with some excellent properties. Therefore, the mineral oil characteristics need to be enhanced for high performance to compete with such alternative liquid insulations. This paper aims to study the power frequency dielectric dissipation factor (tanδ) along with polarization and depolarization current (PDC) characteristics of the mineral oil-based nanofluid and natural ester (NE)-based nanofluid. Besides, Fourier-transform
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Zdanowski, Maciej. "Electrostatic Charging Tendency Analysis Concerning Retrofilling Power Transformers with Envirotemp FR3 Natural Ester." Energies 13, no. 17 (2020): 4420. http://dx.doi.org/10.3390/en13174420.

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Natural and synthetic esters are liquids characterized by insulating properties, high flash point, and biodegradability. For this reason, they are more and more often used as an alternative to conventional mineral oils. Esters are used to fill new or operating transformers previously filled with mineral oil (retrofilling). It is technically unfeasible to completely remove mineral oil from a transformer. Its small residues create with esters a mixture with features significantly different from those of the base liquids. This article presents electrostatic charging tendency (ECT) tests for mixtu
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Lingvay, Iosif, Ion Patru, Livia Carmen Ungureanu, Valerica Stanoi, and Adriana Mariana Bors. "Electro-insulating Paper Degradation in Various Electro-insulating Fluids." Revista de Chimie 69, no. 1 (2018): 91–95. http://dx.doi.org/10.37358/rc.18.1.6050.

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The durability and safe operation of electrical equipment and devices with mixed insulation systems (solid/fluid - electro-insulating paper/oil) is determined by the insulation aging under simultaneous and synergic actions of electrical, thermal and chemical stress factors etc. In this context, degradations of insulating paper exposed to thermal aging in 5 different types of electro-insulating fluid have been studied experimentally. Liquid chromatography determinations have shown that the total content in furan products (resulting from cellulose degradation) in mineral oils is substantially hi
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Sharin, Ab Ghani, Shahril Ahmad Khiar Mohd, Sutan Chairul Imran, and Imran Zamir Muhammad. "Effect of repeated electrical breakdowns on mineral and natural ester insulating oils." Bulletin of Electrical Engineering and Informatics 10, no. 6 (2021): 2989–96. https://doi.org/10.11591/eei.v10i6.3258.

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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 increasing demand for alternative insulating oils for oilimmersed transformers, it is worthy to compare the performance of different types of insulating oils (conventional mineral-based insulating oil and natural ester-based insulating oil) under repeated electrical breakdown. In this paper, the AC breakdown voltage of different mineral-based and natur
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Zhang, Tao, Min Chen, Haohan Zhou, Guangrui Shi, Xiping Fan, and Qian Wu. "Study on the Anti-Aging Performance of Different Nano-Modified Natural Ester Insulating Oils Based on Molecular Dynamics." Nanomaterials 13, no. 4 (2023): 653. http://dx.doi.org/10.3390/nano13040653.

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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 using molecular simulation techniques. Three models were established: an oil–water model without the addition of nanoparticles and two which contained nano-Fe3O4 and nano-Al2O3 particles, where the concentration of water was 1 wt.%. The research found that the diffusion of water molecules in the nano-modified model was slow, and the water molecul
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Chairul, Imran Sutan, Sharin Ab Ghani2, Nur Hakimah Ab Aziz, Mohd Shahril Ahmad Khiar, Muhammad Syahrani Johal, and Mohd Aizzat Azmi. "Effect of electrical discharge on the properties of natural esters insulating fluids." Indonesian Journal of Electrical Engineering and Computer Science 23, no. 3 (2021): 1281–88. https://doi.org/10.11591/ijeecs.v23.i3.pp1281-1288.

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Vegetable oils have been an alternative to mineral oil for oil-immersed transformers due to concern on less flammable, environmental-friendly, biodegradable, and sustainable resources of petroleum-based insulating oil. This paper presents the effect of electrical discharges (200 up to 1000 discharges) under 50 Hz inhomogeneous electric field on the properties (acidity, water content, and breakdown voltage) of two varieties of vegetablebased insulating oils; i) natural ester (NE) and ii) low viscosity insulating fluids derived from a natural ester (NELV). Results show the water content, acidity
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Dissertations / Theses on the topic "Natural ester insulating oil"

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Jurčák, Tomáš. "Komparace elektrických vlastností alternativních elektroizolačních kapalin a minerálních olejů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-254473.

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Master thesis deals with electrical insulating fluids in electrical engineering. It includes the distribution of liquids by ISO standard, distribution of oils and the current state of research into alternative electrical insulating liquids and description of selected dielectric properties. Furthermore, measurements were taken of selected electrical properties of the samples, and later their evaluation.
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Liu, Qiang. "Electrical performance of ester liquids under impulse voltage for application in power transformers." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/electrical-performance-of-ester-liquids-under-impulse-voltage-for-application-in-power-transformers(3702b3a2-ec5f-4674-ab11-1032906e8c0c).html.

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Ester liquids including both natural ester and synthetic ester are being considered as potential alternatives to mineral oil, due to their better environmental performance and for some liquids their higher fire point. Although these liquids have been widely used in distribution and traction transformers, it is still a significant step to adopt ester liquids in high-voltage power transformers because the high cost and severe consequence of a factory test failure and the high level of safety and reliability required in service for these units, tend to lead to a cautious approach to any step chan
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Koide, Hidenobu, Keizo Kawanishi, Katsumi Kato, Hitoshi Okubo, Naoki Hayakawa, and Hiroki Kojima. "Charge behavior in Palm Fatty Acid Ester Oil (PFAE) / pressboard composite insulation system under voltage application." IEEE, 2012. http://hdl.handle.net/2237/20736.

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Tran, Duy Chau. "Propriétés diélectriques de liquides isolants d'origine végétale pour applications en haute tension." Grenoble 1, 2009. http://www.theses.fr/2009GRE10017.

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Pour des raisons autant écologiques qu'économiques ou techniques, des huiles de base d'esters naturels ont été utilisées pour remplacer de l'huile minérale dans les appareillages basse et moyenne tensions. Ce travail consiste en étude de caractérisation d'un mélange des esters naturels de faible viscosité (RS50) basant sur l'huile de colza pour les applications dans les transformateurs haute tension. L'influence des facteurs humidité, température, teneur en particules ainsi que vieillissement thermique sur ses propriétés diélectriques telles que : permittivité, conductivité, pertes et rigidité
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Δημακοπούλου, Παναγιώτα. "Διηλεκτρικές δοκιμές ελαίων φυτικής προέλευσης". Thesis, 2011. http://hdl.handle.net/10889/4913.

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Η μόνωση του εξοπλισμού και των εγκαταστάσεων υψηλής τάσης είναι απαραίτητη προκειμένου να διατηρηθεί η διαφορά δυναμικού μεταξύ των υπό υψηλή τάση αγώγιμων μερών. Παράλληλα με τον κύριο προορισμό της, η μόνωση μπορεί να έχει και άλλους ρόλους, όπως η μηχανική στήριξη των αγωγών, η ανταλλαγή θερμότητας κ.ά. Στην παρούσα εργασία ασχοληθήκαμε με τα ηλεκτροτεχνικά υγρά τόσο θεωρητικά όσο και πειραματικά. Σε θεωρητικό επίπεδο, περιγράφουμε το ρόλο των μονωτικών λαδιών, τις χρήσεις, τις ιδιότητες τους και τους παράγοντες που τα επηρεάζουν. Σε πειραματικό επίπεδο πραγματοποιούμε πλήθος μετρήσεων μ
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Book chapters on the topic "Natural ester insulating oil"

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Zhang, Youqin, Jinhui Man, Haoyong Song, et al. "Simulation and Verification of the Temperature Field of 220 kV Natural Ester Insulating Oil Transformer." In Lecture Notes in Electrical Engineering. Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-1870-4_59.

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Kumar, Amit, Indra Jeet Pal, Omkar Yadav, and Deepak Kumar. "Renewable natural ester oil an alternative resource to mineral oil and their physical chemical dielectric properties for transformer insulation oil." In Emerging Trends in IoT and Computing Technologies. Routledge, 2023. http://dx.doi.org/10.1201/9781003350057-90.

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Chen, Liangyuan, Fangyuan Han, Yekang Qin, Zongchang Luo, and Jianxin Li. "Research on Space/Interface Charge Characteristics of Natural Ester Oil-Paper Insulation Under Different Electric Field Strengths and Temperatures." In Lecture Notes in Electrical Engineering. Springer Nature Singapore, 2024. https://doi.org/10.1007/978-981-97-8824-8_72.

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Liu, Daosheng, Hengcen Zhu, and Chele Cui. "Investigation on the Effect of Micro Water Content on the Dielectric Properties of Natural Ester Insulation Oil by Molecular Dynamics Simulation." In Lecture Notes in Electrical Engineering. Springer Nature Singapore, 2025. https://doi.org/10.1007/978-981-96-1387-8_58.

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Qian, Yihua, Ran Zhuo, Yaohong Zhao, Meng Gao, and Qing Wang. "Effect of Adsorption Treatment on Oil Flow Electricity of Synthetic Ester Insulating Oil." In Lecture Notes in Electrical Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-1674-6_7.

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Bakrutheen, M., M. Willjuice Iruthayarajan, and S. Senthil Kumar. "Investigation on the Properties of Natural Esters Blended with Mineral Oil and Pyrolysis Oil as Liquid Insulation for High Voltage Transformers." In Lecture Notes in Electrical Engineering. Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-4852-4_17.

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Wang, Qing, Meng Gao, Yihua Qian, Ran Zhuo, and Yaohong Zhao. "Study on the Influence of Aging Degree and Test Flow Velocity on Electrification of Ester Insulating Oil." In Lecture Notes in Electrical Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-1674-6_9.

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Deepa, S. N., A. D. Srinivasan, M. Anusha, K. T. Veeramanju, and M. R. Chaitra. "Review on the Addition of Antioxidants and Nanoparticles to Natural Ester as an Alternative to Transformer Oil." In Lecture Notes in Electrical Engineering. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-6151-1_15.

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Liu, Zengshe, Jing Li, Gerhard Knothe, Brajendra K. Sharma, and Jiangchung Jiang. "A Novel Application of Chemically Modified Eleostearic Acid Methyl Ester (EAME) for Improving Diesel Lubricity." In Green Chemistry and Green Materials from Plant Oils and Natural Acids. Royal Society of Chemistry, 2023. http://dx.doi.org/10.1039/bk9781837671595-00159.

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Ultra-low-sulfur diesel (ULSD) fuels require addition of higher concentrations of additives or blending with another material of enough lubricity, thereby increasing the cost. Herein, a tung oil-based fatty acid methyl ester (eleostearic acid methyl ester, EAME) and a maleation compound (EAME/MA) were synthesized by reacting with maleic anhydride (MA) via the Diels–Alder reaction. EAME/MA further reacts with short chain alcohols by opening cyclic anhydride to form esters such as methanol and butanol, i.e., EAME/MA/ME and EAME/MA/BU. The EAMA/MA/ME and EAME/MA/BU compounds effectively enhanced
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Kolayli, Sevgi. "A Miracle Food Supplement Obtained from Beehives: Propolis." In Herbs and Spices - New Perspectives in Human Health and Food Industry [Working Title]. IntechOpen, 2024. http://dx.doi.org/10.5772/intechopen.1004254.

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In recent years, propolis has garnered substantial global attention as a dietary supplement, owing to its multifaceted nature and diverse biological properties. Derived from beehives, this natural product, characterized by its sticky, waxy consistency, and aromatic scent, is a complex amalgamation of plant and animal origins. Produced by honeybees through the enzymatic processing of resinous substances from herbal extracts, propolis serves an array of structural and functional roles, from insulating beehives to fortifying their defense against diseases. Raw propolis, collected from hives, is h
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Conference papers on the topic "Natural ester insulating oil"

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Wang, Chaofan, Zhengyong Huang, Kai Zhang, et al. "Study on Dielectric Properties of Natural Ester Based Synthetic Insulating Oil." In 2024 IEEE International Conference on High Voltage Engineering and Applications (ICHVE). IEEE, 2024. http://dx.doi.org/10.1109/ichve61955.2024.10676044.

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Yinwei, Wang, Thaweewat Nantiruj, Surapon Soponkanaporn, and Arporn Paitoon. "Insulation Design Analysis for Natural Ester Oil Power Transformers." In 2024 IEEE 14th International Conference on the Properties and Applications of Dielectric Materials (ICPADM). IEEE, 2024. http://dx.doi.org/10.1109/icpadm61663.2024.10750607.

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Fadillah, Aris, Unzhil Latif Jayyid, Mashudan Kurniawan, et al. "Evaluating the Insulating Performance of Natural Ester Oil in Comparison to Mineral Oil and GTL Oil for Transformer." In 2024 6th International Conference on Power Engineering and Renewable Energy (ICPERE). IEEE, 2024. https://doi.org/10.1109/icpere63447.2024.10845256.

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Zeng, Ningyu, Juyi Pu, Zhengyong Huang, Bowen Lu, and Jian Li. "The Effect of Air Bubbles on Streamer in Natural Ester Insulating Oils." In 2024 IEEE International Conference on High Voltage Engineering and Applications (ICHVE). IEEE, 2024. http://dx.doi.org/10.1109/ichve61955.2024.10676299.

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Kanumuri, Deepak, Ambuj Kumar, Subhendu Sekhar Sahu, Satyajeet Anand, Niharika Baruah, and Sisir Kumar Nayak. "Degradation Study of Oxidatively Aged Natural Ester Oil Immersed Pressboard Insulation." In 2024 IEEE 7th International Conference on Condition Assessment Techniques in Electrical Systems (CATCON). IEEE, 2024. https://doi.org/10.1109/catcon60527.2024.10831956.

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Jayyid, Unzhil Latif, Aris Fadillah, Mashudan Kurniawan, et al. "Comparative Study of Mineral Oil, Synthetic Ester, and Natural Ester as Liquid Insulation in Transformers." In 2024 6th International Conference on Power Engineering and Renewable Energy (ICPERE). IEEE, 2024. https://doi.org/10.1109/icpere63447.2024.10845535.

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Tian, Kaiyi, Jian Li, Zhengyong Huang, et al. "Simulation of the Effect of Fiber Impurity Particles on Streamer Branching in Natural Ester Insulating Oil." In 2024 IEEE International Conference on High Voltage Engineering and Applications (ICHVE). IEEE, 2024. http://dx.doi.org/10.1109/ichve61955.2024.10676040.

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Sahu, Subhendu Sekhar, Deepak Kanumuri, Thirumurugan Chandrasekaran, and Sisir Kumar Nayak. "Partial Discharge Analysis of Natural Ester Oil Based Nanofluid Impregnated Pressboard Insulation." In 2025 IEEE International Conference on Dielectric Liquids (ICDL). IEEE, 2025. https://doi.org/10.1109/icdl63868.2025.11068274.

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Jiang, Yizhou, Zhengyong Huang, Jian Li, Feipeng Wang, Chen Zhao, and Haoyu Guo. "Study on Physicochemical Properties of Liquid Crystal Based Natural Ester Insulation Oil." In 2025 IEEE International Conference on Dielectric Liquids (ICDL). IEEE, 2025. https://doi.org/10.1109/icdl63868.2025.11068234.

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Wang, Qing, Yuting Cai, Ting Deng, Yihua Qian, and Siwei Pan. "Study on the Performance Change of Mineral oil Mixed Natural Ester Insulating Liquid for Long-term Service Transformer." In 2025 8th International Conference on Energy, Electrical and Power Engineering (CEEPE). IEEE, 2025. https://doi.org/10.1109/ceepe64987.2025.11033934.

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