Calculation of optimum dimensions of magnetic shunt elements to reduce stray losses on transformer tank walls

ÇINAR M. A., ALBOYACI B., Curukova S., Sonmez O., Yapici R.

JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY, cilt.32, sa.4, ss.1337-1346, 2017 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 32 Sayı: 4
  • Basım Tarihi: 2017
  • Dergi Adı: JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.1337-1346
  • Anahtar Kelimeler: Transformer, stray losses, magnetic shunts, optimum dimensions, loss reduction
  • Kocaeli Üniversitesi Adresli: Evet

Özet

Stray losses should be carefully considered in loss reduction studies, to increase efficiency of oil immersed transformers. These losses occur due to leakage fluxes and cause local hot-spots and overheating on the tank walls and other structural metal parts. In this study, obtaining an expression of suitable shunt dimensions which satisfactorily reduces the stray losses on tank walls, is aimed. 3D finite element method was intensively used in analyses and main results were also validated by experimental studies. A simple expression of shunt dimensions is proposed. To generalize this expression, obtained shunt dimensions are expressed by means of winding dimensions. Using this optimum shunt dimensions, tank wall losses and total short circuit losses were reduced by 91.43% and 14.9%, respectively.