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Section I

Determination of Capitalization Values for No Load Loss and Load Loss in Distribution Transformers

Authors:

W. D. A. S. Wijayapala ,

University of Moratuwa, LK
About W. D. A. S.

Senior Lecturer, Department of Electrical Engineering,

Eng., Int.PEng(SL), CEng, FIE(Sri Lanka), BSc Eng (Hons) (Moratuwa), MEng (Moratuwa),

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S. R. K. Gamage,

Ceylon Electricity Board, LK
About S. R. K.

Deputy General Manager (BOS),

Eng., CEng, MIE(Sri Lanka), BSc Eng (Moratuwa), MSc (Moratuwa), MFE (Colombo),

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H. M. S. L. G. Bandara

Ceylon Electricity Board, LK
About H. M. S. L. G.

Maintenance Engineer (Sabaragamuwa Province),

Eng. , AMIE(Sri Lanka), BSc Eng (Moratuwa), MSc (Moratuwa),

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Abstract

A large number of distribution transformers are being currently used in the electricity distribution network in Sri Lanka. When purchasing them, it is not sufficient to evaluate only the initial price of the transformer. There are no load losses as well as load losses in the transformer during its life span, which is about 35 years. Therefore, a transformer purchaser has to evaluate the total lifetime cost of the transformer, which includes its purchase price, and the cost of losses that can occur during the life of the transformer. Traditionally, this evaluation has been done based on the Total Owning Cost (TOC). This paper discusses setting up of a methodology to calculate capitalization values for losses in distribution transformers used in Sri Lanka, using IEEE loss evaluation guide.

Capitalization values for distribution transformers depend on capacity and energy costs, economic considerations and on their load profiles. In this research, capitalization values are calculated for three different load profiles of the transformers installed in rural, semi-urban and urban areas of Sri Lanka. In future, any utility can purchase distribution transformers by calculating capitalization values using the methodology presented in this study which is based on a set of economic and other parameters suitable for different applications, i.e. rural electrification, loss reduction in urban cities, augmentation of distribution transformers, etc.

DOI: http://doi.org/10.4038/engineer.v49i3.7072
How to Cite: Wijayapala, W.D.A.S., Gamage, S.R.K. & Bandara, H.M.S.L.G., (2016). Determination of Capitalization Values for No Load Loss and Load Loss in Distribution Transformers. Engineer: Journal of the Institution of Engineers, Sri Lanka. 49(3), pp.11–20. DOI: http://doi.org/10.4038/engineer.v49i3.7072
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Published on 29 Jul 2016.
Peer Reviewed

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