Performance studies on dielectric and physical properties of eco‐friendly based natural ester oils using semi‐conductive nanocomposites for power transformer application

Thirugnanam, A.; Siluvairaj, Willjuice Iruthayarajan Maria; Rajendran, Karthik

doi:10.1049/iet-smt.2017.0467

Cited by 20 publications

(5 citation statements)

References 19 publications

(24 reference statements)

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“…In 2018, researchers studied the electrical breakdown performance effect towards nanofluids. Such a study was done by Ram et al [87] who studied the breakdown performance combination of two nanoparticles, Al 2 O 3 (50 nm) and ZnO (20 nm), after dispersion in three types of natural ester oil (sunflower oil, rice bran oil, and corn oil) at different percentages of volume concentration. The natural ester oil and both nanoparticles react positively in the electrical breakdown value for all ranges of concentrations as illustrated in Figure 6 [88].…”

Section: Performance Of Nanofluidsmentioning

confidence: 99%

A Review on Oil-Based Nanofluid as Next-Generation Insulation for Transformer Application

Suhaimi

Rahman

Din

et al. 2020

Journal of Nanomaterials

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Due to the increasing demand on developing good insulation, several researchers have performed experimental studies to prove the effectiveness and capabilities of transformer oil. This is done by suspending nanosized solid particles in the oil (nanofluid) for transformer applications. In brief, this paper presents a compilation of research studies which is divided into three parts. Part I discuss the preparation of the nanofluid which involves different types of nanomaterials, the optimal amount of concentrations, and applicable synthesisation methods for producing stably suspended nanofluids. In Part II, the nanofluid’s performances including the electrical breakdown voltages, impulse tests, and thermal and dielectric behaviour are reviewed in depth and compared. Part III emphasizes the limitation of nanofluids. Most researchers have agreed that appropriate concentrations of nanomaterials and the preparation method for nanofluids mainly affect the performance of nanofluids especially in terms of electrical properties. Meanwhile, types of nanomaterials and base oil also play a vital role in producing nanofluids as a better alternative transformer oil. However, among a few researchers, there are concerns regarding the issue of agglomeration and inconsistencies of findings that need to be resolved. Therefore, a few aspects must be taken into consideration to produce the next generation of high heat dissipation insulation.

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Section: Performance Of Nanofluidsmentioning

confidence: 99%

A Review on Oil-Based Nanofluid as Next-Generation Insulation for Transformer Application

Suhaimi

Rahman

Din

et al. 2020

Journal of Nanomaterials

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“…Insulation oil is the main insulating and cooling medium for oil-immersed transformers, which are filled with large quantities of combustible transformer oil inside and on top of the oil pillow. Oil-immersed power transformers in the long-term operation process, its internal insulating oil paper will be affected by electrical, thermal, mechanical stress and other factors and gradually deteriorate, resulting in its insulation performance decline, in the fault, high temperature conditions fire, often leading to oil-immersed transformers themselves and other adjacent electrical equipment damage, serious damage to substations, once a fire will not only affect the safe and stable operation of the power grid, and even to the safety of society has a great impact [6][7][8][9][10][11][12]. In a 220kV transformer fire true type experiment, the temperature around the fire was up to 800℃, causing serious damage to the facilities around the substation [13].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of 35kV Oil-Immersed Transformer Fire and Extinguishing Effects of High-Pressure Fine Water Mist

Yao¹,

Lv²,

Shi³

et al. 2023

IJHT

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Oil-immersed transformer is the key equipment of power transmission, the fire caused by its failure will cause huge economic losses. The aim of this study is to investigate the combustion characteristics of oil-immersed transformer fires under different environmental conditions, and the effectiveness of high-pressure fine water spray on transformer fires under different parameters. Numerical simulation of transformer fires using PyroSim software simulation of high-pressure fine water mist fire extinguishing effect -parameter optimisation, focusing on the combustion characteristics of transformer fires at different ambient temperatures (-5℃, 0℃, 5℃, 10℃, 20℃) and wind speeds (0 m/s, 1 m/s, 2 m/s, 4 m/s) and the suppression effect of high-pressure fine water mist on transformer fires at different spray flows (0.3 L/min, 0.6 L/min) and ambient wind speeds (0 m/s, 1 m/s, 2 m/s, 4 m/s). The simulation results show a negative correlation between the temperature variation above the flame and the spatial height. Changes in ambient temperature with insignificant changes in flue gas concentration and mean changes in flue gas temperature between 800℃ and 900℃. Changing the ambient wind speed deflects the flame along the wind direction and has a greater effect on the temperature field distribution above the flame. When the spray flow rate is 0.6L/min, the high-pressure fine water mist system has a better cooling effect on transformer fires. This study has shown that high pressure fine water mist systems can effectively extinguish oil-immersed transformer fires under the appropriate parameters. However, the effectiveness of the high-pressure fine water mist in extinguishing fires is reduced in the presence of increased ambient wind speeds. This paper provides the corresponding theoretical support for the development.

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“…Its excellent performance ensures its popularity, but the problem of non-biodegradability remains. It is also feared that mineral oil may become increasingly scarce in the future and as a result there is growing interest in natural alternatives that offer better biodegradability [9]. Studies have recently been performed to examine natural esters, while palm oil has also drawn increasing interest since its qualities may be suitable for use in transformers [10].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Temperature on the Electrical Characteristics of Nanofluids Based on Palm Oil

Muangpratoom

2021

J. Eng. Technol. Sci.

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This study sought to apply nanotechnology to develop the electrical characteristics of palm oil. Experiments were conducted using three types of nanoparticles: zinc oxide (ZnO), titanium dioxide (TiO2), and barium titanate (BaTiO3). The nanofluid samples were prepared by mixing the nanoparticles with palm oil using various processes. In the first scenario, a combination of palm oil with nanoparticles at 0.01 vol% was created, while the next sample had 0.03 vol% of nanoparticles. The samples were then fully dispersed using a magnetic stirrer, followed by ultrasonic dispersal in order to ensure homogeneity of the nanofluid. The electrodes were set 2.5 mm apart and the test was performed six times on each test sample in compliance with the IEC 60156 standard. The voltage breakdown characteristics were recorded for each of the liquids at temperatures varying from 35 °C to 90 °C. The results showed that for the palm oil samples containing nanoparticles, the voltage breakdown was greater than for the samples containing unmodified palm oil.

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Performance studies on dielectric and physical properties of eco‐friendly based natural ester oils using semi‐conductive nanocomposites for power transformer application

Cited by 20 publications

References 19 publications

A Review on Oil-Based Nanofluid as Next-Generation Insulation for Transformer Application

A Review on Oil-Based Nanofluid as Next-Generation Insulation for Transformer Application

Numerical Simulation of 35kV Oil-Immersed Transformer Fire and Extinguishing Effects of High-Pressure Fine Water Mist

The Effect of Temperature on the Electrical Characteristics of Nanofluids Based on Palm Oil

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