Performance analysis of natural esters as transformer liquid insulation &amp;#x2014; Coconut, castor and sesame oils

Naranpanawe, W. M. L. B.; Fernando, M. A. R. M.; Kumara, J. R. S. S.; Naramapanawa, E. M. S. N.; Kalpage, C. S.

doi:10.1109/iciinfs.2013.6731964

Cited by 24 publications

(12 citation statements)

References 7 publications

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“…Adeolu et al stated that raw castor oil is not appropriate to be applied for HV applications since its BDVs are less than the lowest necessary for the application [ 153 ]. However, Naranpanawa et al (2013) concluded that castor oil has suitable BDV however, also presents an exceptional pour point with the only associated shortcoming of large viscosity [ 154 ]. Lately, Banumathi et al studied that castor oil indicates greater BDV and good fire point than MO.…”

Section: New and Innovative Technologies For Environmentally Frienmentioning

confidence: 99%

Sustainable, Renewable and Environmental-Friendly Insulation Systems for High Voltages Applications

et al. 2020

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With the inception of high voltage (HV), requisites on the insulating permanence of HV equipment is becoming increasingly crucial. Mineral/synthetic oil liquid insulation—together with solid insulation materials (paper, pressboard)—is the fundamental insulation constituent in HV apparatuses; their insulation attributes perform a substantial part in a reliable and steady performance. Meanwhile, implications on the environment, scarcity of petroleum oil supplies and discarding complications with waste oil have stimulated investigators to steer their attention towards sustainable, renewable, biodegradable and environmentally friendly insulating substances. The contemporary insulating constituent’s evolution is driven by numerous dynamics—in particular, environmental obligations and other security and economic issues. Consequently, HV equipment manufacturers must address novel specifications concerning to these new standards. Renewable, sustainable and environmentally friendly insulating materials are continuously substituting conventional insulating items in the market place. These are favorable to traditional insulating materials, due to their superior functionality. The also offer explicit security and eco-friendly advantages. This article discusses cutting-edge technology of environmentally friendly insulating materials, including their fabrication, processing and characterization. The new renewable, insulating systems used in HV equipment are submitted and their fundamental gains stated in comparison with conventional insulating materials. Several experimental efforts carried out in various parts of the world are presented, offering an outline of the existing research conducted on renewable insulating systems. The significance of this article lies in summarizing prior investigations, classifying research essence, inducements and predicting forthcoming research trends. Furthermore, opportunities and constraints being experienced in the field of exploration are evidently reported. Last but not least, imminent research proposals and applications are recommended.

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Section: New and Innovative Technologies For Environmentally Frienmentioning

confidence: 99%

Sustainable, Renewable and Environmental-Friendly Insulation Systems for High Voltages Applications

et al. 2020

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“…The new oils' characteristics and lifetimes were studied and further compared with mineral oils [4][5]12]. It was remarked that the ageing rates of transformer paper are lower in vegetable oil, respectively that the lifetimes of paper aged in vegetable oil are higher than those aged in mineral oil [4-5, 10, 12-16].…”

Section: Vegetable Oil's Ageingmentioning

confidence: 99%

“…Therefore, starting with 1990, research efforts aimed to develop a fully biodegradable insulating fluid, the vegetable oils being considered the most likely candidates [2]. Canola, corn, cotton seed, peanut, olives, safflower, soybean, sunflower [2], coconut, castor, sesame [4], rapeseed, palm, Indian beech oils etc. were obtained and tested [5].…”

Section: Introductionmentioning

confidence: 99%

Lifetime estimation of vegetable oil for transformers

Ciuriuc

Notingher

Setnescu

et al. 2014

2014 ICHVE International Conference on High Voltage Engineering and Application

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In this paper the results of an experimental study concerning the vegetable oil's (subjected to thermal ageing) lifetime estimation based on the activation energy and IEC 60216-1/2001 methods are presented. Three accelerated thermal ageing tests were performed on transformer vegetable oil samples at 135, 155 and 175 °C. The lifetime curves were drawn for three diagnostic factors, namely loss factor, conductivity and total acid number. Using DSC (Differential Scanning Calorimetry) method, the activation energy corresponding to the oxidation reaction has been determined. Subsequently, using the results of thermal ageing at 175 °C, the lifetime curves have been drawn. It is concluded that the activation energy method is quicker and less expensive therefore it could be useful to obtain new information about a new vegetable oil for paper/oil insulations.

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“…On the other hand, a few thermal ageing studies have been carried out on CO that focussed on the oil properties such as interfacial tension, acidity, AC breakdown voltage and dielectric properties [ 49 , 50 ]. Other studies cover on the conductivity, frequency dielectric spectroscopy analysis, and gassing characteristics of CO under thermal/electrical faults [ 11 , 51 ]. There have also been a few studies on the lightning breakdown voltages of both RBDPO and CO [ 51 , 52 , 53 , 54 ].…”

Section: Introductionmentioning

confidence: 99%

“…Other studies cover on the conductivity, frequency dielectric spectroscopy analysis, and gassing characteristics of CO under thermal/electrical faults [ 11 , 51 ]. There have also been a few studies on the lightning breakdown voltages of both RBDPO and CO [ 51 , 52 , 53 , 54 ]. This paper will focus not only on the general ageing characteristics of PO and CO; it will also focus on the mechanical strength performance of the transformer’s insulation paper in the presence of moisture.…”

Section: Introductionmentioning

confidence: 99%

Ageing Study of Palm Oil and Coconut Oil in the Presence of Insulation Paper for Transformers Application

et al. 2018

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This paper presents a sealed ageing study of palm oil (PO) and coconut oil (CO) in the presence of insulation paper. The type of PO under study is refined, bleached, and deodorized palm oil (RBDPO) olein. Three different variations of RBDPO and one sample of CO are aged at temperatures of 90 °C, 110 °C, and 130 °C. The properties of RBDPO and CO as well as paper under ageing are then analysed through dielectric and physicochemical measurements. It is found that the effect of ageing is not significant on the alternating current (AC) breakdown voltages and relative permittivities of RBDPO and CO. There is a slight increment trend of the resistivity for CO, while for all of the RBDPO, the resistivity slightly decreases as the ageing progresses. Only CO shows an apparent reduction of the dielectric dissipation factor. Throughout the ageing time, the acidities of all of the RBDPO and CO remain at low level, while the moisture in oils decreases. The tensile index (TI) of the papers for all of the RBDPO and CO retain more than 50% of the TI. A significant increment of the paper ageing rates of all of the RBDPO and CO is observed at an ageing temperature of 130 °C.

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Performance analysis of natural esters as transformer liquid insulation — Coconut, castor and sesame oils

Cited by 24 publications

References 7 publications

Sustainable, Renewable and Environmental-Friendly Insulation Systems for High Voltages Applications

Sustainable, Renewable and Environmental-Friendly Insulation Systems for High Voltages Applications

Lifetime estimation of vegetable oil for transformers

Ageing Study of Palm Oil and Coconut Oil in the Presence of Insulation Paper for Transformers Application

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