Pregled bibliografske jedinice broj: 1271788
Experience with biodegradable liquids in instrument transformers with an emphasis on dielectric testing
Experience with biodegradable liquids in instrument transformers with an emphasis on dielectric testing // Joint CIGRE SC B3 & A3 Colloquium 2023
Birmingham: CIGRÉ, 2023. str. 1-11 (predavanje, međunarodna recenzija, cjeloviti rad (in extenso), stručni)
CROSBI ID: 1271788 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Experience with biodegradable liquids in
instrument transformers with an emphasis on
dielectric testing
(Experience with biodegradable liquids in instrument
transformers with an emphasis on dielectric testing)
Autori
Koprivec, Krešimir ; Žiger, Igor ; Ivanović, Darko ; Župan, Tomislav
Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), stručni
Izvornik
Joint CIGRE SC B3 & A3 Colloquium 2023
/ - Birmingham : CIGRÉ, 2023, 1-11
Skup
Joint CIGRE SC B3 & A3 Colloquium 2023
Mjesto i datum
Birmingham, Ujedinjeno Kraljevstvo, 09.05.2023. - 12.05.2023
Vrsta sudjelovanja
Predavanje
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
Instrument transformers, Biodegradable liquids, Dielectric performance, Simulated aging, Partial discharge, Impulse testing, Paper-liquid insulation systems
Sažetak
There is little thorough experience regarding the use of alternative, biodegradable insulation liquids in high-voltage instrument transformers while extensive research exists for power and distribution transformers. Implementation of the mentioned dielectric liquids requires an extensive testing sequence to verify its expected performance. This is why the first aim of the paper is to detail the referent testing sequence which consisted of routine and type tests including increased partial discharge requirements, multiple chopped test, lifetime expectancy test, insulation breakdown test and additional tests such as: temperature rise, cold weather performance, internal arc and material compatibility tests. Each step of the testing sequence was also accompanied by DGA testing. In addition to presenting the proposed testing sequence for qualification of new dielectric liquids, the main emphasis of this paper will be on aspect of dielectric performance. The body of this paper will be presented through actual testing performed on several prototypes. Two biodegradable dielectric liquids were used for this effort: MIDEL 7131, a synthetic ester and Nynas NYTRO BIO 300X, a bio-hydrocarbon based isoparaffinic oil. The main parameters considered include but are not limited to: tgδ, insulation capacitance, partial discharge inception voltage, gas increases, etc.
Izvorni jezik
Engleski
Znanstvena područja
Elektrotehnika
