Comparative study of dielectric properties of mineral oil, synthetic ester and natural ester

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F22%3APU147841" target="_blank" >RIV/00216305:26220/22:PU147841 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Comparative study of dielectric properties of mineral oil, synthetic ester and natural ester

Popis výsledku v původním jazyce

The current research of insulating oils for high-voltage applications focuses mainly on biodegradable oils that are in line with sustainable development. Mineral oils may in the future be replaced by more environmentally friendly materials with similar properties. One of the probable options as substitutes in the future will be synthetic or natural esters. This paper presents a comparative experimental study of mineral oil, natural ester, and synthetic ester and their dielectric properties, specifically AC breakdown voltage, lightning breakdown voltage, and thermal dependence of dissipation factor, volume resistivity, and relative permittivity. Measurements of AC and lightning breakdown voltage were performed according to IEC 60156 with a horizontally positioned sphere–sphere electrode system. Synthetic ester reached the mean value of AC breakdown voltage 60.2 kV, lightning breakdown voltage with positive polarity 144.3 kV, and with negative polarity 148.6 kV. Natural ester showed a mean value of AC breakdown voltage 58.4 kV, the lightning breakdown voltage of positive and negative polarity was 149.5 kV and 151.5 kV, respectively. Measurement of dissipation factor, volume resistivity, and relative permittivity was executed in accordance with IEC 60247 2004. The dissipation factor moved from 0.0031 at 20°C to 0.3119 at 140°C for synthetic ester and from 0.0011 at 20°C to 0.0331 at 140°C for natural ester. These results are compared with the dielectric properties of mineral oil. The challenging problem of potential oil substitution in power transformers is discussed.

Název v anglickém jazyce

Comparative study of dielectric properties of mineral oil, synthetic ester and natural ester

Popis výsledku anglicky

The current research of insulating oils for high-voltage applications focuses mainly on biodegradable oils that are in line with sustainable development. Mineral oils may in the future be replaced by more environmentally friendly materials with similar properties. One of the probable options as substitutes in the future will be synthetic or natural esters. This paper presents a comparative experimental study of mineral oil, natural ester, and synthetic ester and their dielectric properties, specifically AC breakdown voltage, lightning breakdown voltage, and thermal dependence of dissipation factor, volume resistivity, and relative permittivity. Measurements of AC and lightning breakdown voltage were performed according to IEC 60156 with a horizontally positioned sphere–sphere electrode system. Synthetic ester reached the mean value of AC breakdown voltage 60.2 kV, lightning breakdown voltage with positive polarity 144.3 kV, and with negative polarity 148.6 kV. Natural ester showed a mean value of AC breakdown voltage 58.4 kV, the lightning breakdown voltage of positive and negative polarity was 149.5 kV and 151.5 kV, respectively. Measurement of dissipation factor, volume resistivity, and relative permittivity was executed in accordance with IEC 60247 2004. The dissipation factor moved from 0.0031 at 20°C to 0.3119 at 140°C for synthetic ester and from 0.0011 at 20°C to 0.0331 at 140°C for natural ester. These results are compared with the dielectric properties of mineral oil. The challenging problem of potential oil substitution in power transformers is discussed.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

<a href="/cs/project/LM2015092" target="_blank" >LM2015092: Výkonové laboratoře CVVOZE</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

ELEKTROENERGETIKA 2022: Proceedings of the 11th International Scientific Symposium on Electrical Power Engineering

ISBN

9788055341040

ISSN

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e-ISSN

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Počet stran výsledku

5

Strana od-do

241-245

Název nakladatele

Technical University of Kosice

Místo vydání

neuveden

Místo konání akce

Stará Lesná

Datum konání akce

12. 9. 2022

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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