Improved prediction of temperature distribution in power transformers.

• Autorzy: Wemlader A. , Tenbohlen S.
• Konferencja: APTADM 2007, III International Conference on Advances in Processing Testing and Application of Dielectric Materials., September, 26-28, 2007 Wrocław, Poland
• Języki publikacji: EN

Abstrakty

EN

In modern development of transformers there is a strong requirement for a save thermal calculation on the one hand and - on the other hand not to use more material and further resources than necessary. These aims can only be achieved by a precise calculation of the temperature distribution in the windings. The conventional way of calculating the temperature distribution is to calculate the bulk temperature of the oil in the winding channels by the known losses, the flow rate and the heat capacity of the oil. The temperature in the solid insulation is further calculated by an assumed heat transfer coefficient which is in reality known only very roughly. The topic of this article is a more precise alternative way of calculating the temperature distribution by first calculating the flow field by CFD (Computational Fluid Dynamics) models and therefore get a much more accurate value for the local heat-transfer coefficient between oil and solid insulation.

Słowa kluczowe

EN

thermal behaviour; cooling; oil transformer; CFD; simulation; calculation; coolant; power transformer

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Prace Naukowe Instytutu Podstaw Elektrotechniki i Elektrotechnologii Politechniki Wrocławskiej. Konferencje
• Rocznik: 2007
• Tom: Vol. 46, nr 19
• Strony: 278--281
• Opis fizyczny: Bibliogr. 2 poz.

Twórcy

autor

Wemlader A.

autor

Tenbohlen S.

• University of Stuttgart

Bibliografia

• [1] Jiahui Zhang and Xianguo Li, Coolant flow distribution and pressure loss in ON AN transformer windings - part I: theory and model development, Power Delivery, IEEE Transactions on Power Delivery, Vol. 19, Issue: 1, Jan. 2004, pp. 186-193.
• [2] Jiahui Zhang and Xianguo Li, Coolant flow distribution and pressure loss in ON AN transformer windings - part II: optimization of design parameters, Power Delivery, IEEE Transactions on Power Delivery, Vol. 19, Issue: 1, Jan. 2004, pp. 194-199.