Naslov
Prediction of local temperature rise in power transformer tank by FEM

Autori
Sitar, Robert ; Šulc, Ivan ; Janić, Žarko

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
4th International Colloquium "Transformer Research and Asset Management", Pula, Croatia, May 10 – 12, 2017 / - Pula : Hrvatski komitet međunarodne konferencije za velike električne sisteme (CIGRE), 2017, NM_4-NM_4

Skup
4th International Colloquium "Transformer Research and Asset Management", Pula, Croatia, May 10 – 12, 2017

Mjesto i datum
Pula, Hrvatska, 10.05.2017. - 12.05.2017

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
power transformer ; coupled calculation ; local overheating

Sažetak
Paper presents research on experimental model for tank local overheating. By using an experimental model, phenomena of tank local overheating is investigated without need of expensive experiments on real transformer unit. This first step of research is made with reliable measurements of losses and temperatures in tank on a simple experimental setup. Using commercial numerical tools based on finite element method (FEM) for coupled electromagnetic-thermal calculation, temperatures on experimental model are calculated. Both electromagnetic and thermal model have nonlinear parameters that can have high influence on value of stray losses and cooling conditions. Calculated temperatures are compared to measurement results. In the last part of the paper, measurements of tank temperatures with infrared camera on real three-phase power transformer are presented. 3D nonlinear numerical model of power transformer is created in FEM. Numerical model includes core, windings, LV leads and metal parts. Obtained temperatures are compared to calculation results by FEM and give good agreement.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

POVEZANOST RADA