Pregled bibliografske jedinice broj: 747361
Improvement of thermal performance of generator step-up transformers
Improvement of thermal performance of generator step-up transformers // Applied thermal engineering, 78 (2015), 516-524 doi:10.1016/j.applthermaleng.2014.12.052 (međunarodna recenzija, članak, znanstveni)
CROSBI ID: 747361 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Improvement of thermal performance of generator step-up transformers
Autori
Sitar, Robert ; Janić, Žarko ; Štih, Željko
Izvornik
Applied thermal engineering (1359-4311) 78
(2015);
516-524
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
Aluminum shield; High current; Power transformer; Stray loss; Heat transfer
Sažetak
Generator step-up transformers have high losses in structural parts due to high current leads. As distribution of magnetic field is nonuniform it may easily cause high local losses and high temperature rises. This paper studies impact of aluminum shields on losses and temperature rise. Using a 3D finite element method (FEM) software, calculations for five different leads arrangement are done on a model of a 220 MVA transformer with phase current of 4.4 kA. Influence on results of non-linear magnetic property and non-linear thermal parameters are studied as well. Finally, calculation results are verified by measurements. Experiment has confirmed that aluminum shield is a correct measure for reducing tank local overheating.
Izvorni jezik
Engleski
Znanstvena područja
Elektrotehnika
POVEZANOST RADA
Projekti:
HRZZ-IP-2013-11-1118 - Numeričko modeliranje složenih elektromagnetskih pojava u transformatorima (NM_TRAF) (Štih, Željko, HRZZ ) ( CroRIS)
Ustanove:
KONČAR - Institut za elektrotehniku d.d.,
Fakultet elektrotehnike i računarstva, Zagreb
Citiraj ovu publikaciju:
Časopis indeksira:
- Current Contents Connect (CCC)
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
- Scopus
