Paper Details

Transformers are classified among the most important building blocks of any electric powersystem network. Transmission and Distribution losses are among the main thing that is emphasized and istaken into consideration by demands of the customer. The T & D loss varies in a range of 10 to 40% which isconsidered to be significant high. In a process of reducing total T & D losses, Loss capitalization for themodern age transformers has increased in a great extent. This indicates necessity of reducing losses (i.e. noload loss and load loss).Stray losses in the transformer contribute around 15 to 40% in the load losses which is considered to be asignificant amount. Hence to match the loss capitalization stray losses shall be reduced. This is achieved bycontrolling the leakage field. Large rating transformers are with strong electromagnetic field; If the field isnot controlled it links with the various structural parts of the transformer and will result in to excessive lossconcentration, local heating (i.e. hot spots) and further gasification during service conditions. Variousmeasures e.g. magnetic and nonmagnetic shields are known to control the stray field in the transformers.Effective solution needs to be selected to make shielding measure more optimum. This paper presents a casestudy involving estimation of stray losses in a 200 MVA, 220/132/11kV Auto transformer using an IntegralEquation Method (IEM) and Finite Element Method (FEM) based EDMAG-3D software program.

Ankit M. Patel, Aniruddha S. Jhala, Hitesh M. Karkar, “Analysis of Stray Losses Calculation in Auto-Transformer Using Coupled IEM and FEM Technique”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 1, Issue 3, pp. 152-159, March 2014.