Behavior of alternative electro insulating liquid at solidification process

Trnka, Pavel; Hornak, Jaroslav; Mentlík, Václav; Harvanek, Lukas; Pihera, Josef

doi:10.1109/icd.2016.7547827

Cited by 3 publications

(2 citation statements)

References 6 publications

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“…This parameter has been implemented in accordance with (5) where the λ represents thermal conductivity, ϑ still means the temperature and a λ , b λ , c λ are the regression coefficients.…”

Section: Thermal Conductivitymentioning

confidence: 99%

“…Reference [1] along with [2], [3], [4], [5] also points out several benefits of natural esters such as significantly higher biodegradability, fire resistance and water saturation point compared to the mineral oil. Moreover, the lower price might be also mentioned in comparison to the mineral oils [5]. Nonetheless, few disadvantage can be noticed according to aforementioned references as well.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Natural Ester Insulating Fluid Properties and Thermal Model of a Transformer in Wide Temperature Range

Leffler¹,

Sobotka

Mokra³

et al. 2022

2022 International Conference on Diagnostics in Electrical Engineering (Diagnostika)

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Currently, a significant number of transformers are designed and used in the electricity distribution network. Since these machines are commonly based on an oil-paper electrical insulation system, it is crucial to know how certain important parameters of an oil behave within a wide range of ambient temperatures. Therefore, the range of temperatures should also include low temperature region as these conditions might occur in real application. The aim of this paper is to focus on the temperature dependent viscosity, density, thermal conductivity and specific heat of an oil in order to develop a strongly coupled thermal model of a transformer which is filled with biodegradable natural ester insulation fluid. Obtained results can be well applied within the design, operation and diagnostics phase of these types of electrical machines.

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Section: Thermal Conductivitymentioning

confidence: 99%