Studies of Electrical and Thermal Characteristics of Natural Ester Immersed Transformer Compared with Mineral Oil Immersed and Palm Oil Immersed Transformer

Maneerot, Sakda; Jariyanurat, K.; Nimsanong, P.; Bunlaksananusor, C.; Kunakorn, A.; Pattanadech, Norasage

doi:10.1109/cmd.2018.8535807

Cited by 11 publications

(6 citation statements)

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“…Chemically, IVO, used in transformers, is formed by molecules of acylglycerols, which originate from the condensation between fatty acids and glycerol (tri-alcohol), forming esters of fatty acids [8,12,36,37]. In the case of IVO, three fatty acid molecules covalently associate with glycerol, forming esters of fatty acid called triacylglycerol [12,12,[37][38][39][40]. Figure 5 shows the chemical structure of triacylglycerol.…”

Section: Insulating Vegetable Oil (Ivo)mentioning

confidence: 99%

“…An important chemical characteristic of IVO are natural esters, which have a high affinity for water, contributing to the increase in the useful life of solid insulation, which is directly related to the reduction of costs for electric utilities [26,28,37,39,40,46,47]. This statement regarding the chemical characteristics of IVO was made through the results of IVO aging studies, which showed that the insulating paper has its life extended in the presence of vegetable-based oils [23,28,48].…”

Section: Insulating Vegetable Oil (Ivo)mentioning

confidence: 99%

“…And yet, according to [28,49], the fluids of natural esters present different dielectric performance, with a dielectric strength of the same magnitude as that of IMO. However, water does not significantly affect the dielectric strength of IVO, unlike IMO due to its chemical properties, giving superiority to IVO with greater resistance to high temperatures [8,28,35,39,40,49].…”

Section: Insulating Vegetable Oil (Ivo)mentioning

confidence: 99%

“…In a transformer, the winding insulation system makes the distribution of requests inversely proportional to the material's electrical permittivity [4,45]. Thus, the greater the electrical permissiveness of the esters, the lower the electrical demand on the windings as the winding insulation system consists of paper and oil [39,46]. This characteristic allows isolated transformers with IVO to withstand greater overloads than those using IMO [35,36].…”

Section: Insulating Vegetable Oil (Ivo)mentioning

confidence: 99%

“…This guide is intended to standardize the indexes for maintaining the IVO after using and energizing electrical equipment containing oil [46]. This IEEE Guide also includes the description of the tests to be carried out, filling practices, handling and maintenance of insulating fluids during use, in addition to bringing all the reference values for the IVO specifically after energizing new equipment, such as also during use [27,39,40,46,49,56].…”

Section: Standardization For Insulating Oilsmentioning

confidence: 99%

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Analysis of the application of Insulating Vegetable Oil in electric power distribution transformers

Silva

2020

Acad. Journal on Comp., Eng. and Appl. Math.

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Distribution transformers are present in large quantities in the electrical system, in addition to being essential equipment for delivering quality and reliable energy to consumers. This distribution transformers have a dielectric insulation and refrigeration system, with Insulating Mineral Oil (IMO) being the most used. However, the large-scale use of IMO entails a very high environmental risk, because in addition to its fossil origin (petroleum), it also has low biodegradability and is highly toxic and polluting to the environment. In view of this, substitution alternatives for the IMO began to be sought, where, over the years and with technological advances, Insulating Vegetable Oil (IVO) with characteristics similar to the IMO emerged, in addition to being highly biodegradable and providing an alternative sustainable development for the construction of transformers. Thus, the objective of this work is to carry out an analytical study about the characteristics and benefits of using the vegetable fluid for the equipment and for the environment, in addition to comparing the efficiency and cost parameters of IVO and IMO according to current standards. As a contribution, this paper seeks to provide a broad theoretical foundation on IVO and IMO in order to provide conceptualization to agroenergy researchers.

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