Numerical analysis of local hot-spot temperatures in transformer windings by using alternative dielectric fluids

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Numerical analysis of local hot-spot temperatures in transformer windings by using alternative dielectric fluids

Tae-Won Park - Nama Orang; Seong Ho Han - Nama Orang;

This paper deals with the thermal characteristics of traditional mineral oil and alternative dielectric fluids. Candidates of alternative dielectric fluids used in the transformer were silicon oil, HMWH, synthetic ester and natural ester. In this study, the transformer which uses synthetic ester and natural ester was focused. 3 ph, 66 kV, 16.5 MVA power transformer and 3 ph, 22 kV, 2.3 MVA distribution transformer were considered and compared the hot-spot temperatures
and top oil temperatures by using the computational fluid dynamics (CFD). Kinematic viscosities of natural ester and synthetic ester were four times and three times higher than the mineral oil at the working temperature of 60 ◦C respectively. The flow rate of natural ester and synthetic ester was 50–40%decreased. Therefore, the hot-spot temperature of natural ester and synthetic ester was 24 and 14 % higher than the use of mineral oil respectively.

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Judul Seri: ELECTRICAL ENGINEERING
No. Panggil: -
Penerbit: Berlin : Springer-Verlag Berlin Heidelberg., 2015
Deskripsi Fisik: Electr Eng (2015) 97:261–268
Bahasa: English
ISBN/ISSN: DOI 10.1007/s00202-0
Klasifikasi: -
Tipe Isi: -
Tipe Media: -
Tipe Pembawa: -
Edisi: (2015) 97:261–268
Subjek: ELECTRICAL ENGINEERING
Info Detail Spesifik: -
Pernyataan Tanggungjawab: deliza

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