Reduction of Power Grid Losses by Using Energy Efficient Distribution Transformers

Themistoklis D. Kefalas; Antonios Kladas

doi:10.4028/www.scientific.net/MSF.721.269

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HomeMaterials Science ForumMaterials Science Forum Vol. 721Reduction of Power Grid Losses by Using Energy...

Reduction of Power Grid Losses by Using Energy Efficient Distribution Transformers

Abstract:

The importance of distribution transformer no-load loss on the operation of modern electrical grids is often underestimated. Internationally, distribution transformer no-load loss constitutes nearly 25% of the transmission and distribution losses of electrical grids. The losses in European Union distribution transformers are estimated at about 33 TWh/year whereas, reactive power and harmonic losses add a further 5 TWh/year. In the Greek electrical grid the no-load losses of 140,000 distribution transformers are estimated at about 490 GWh/year. This paper has two goals the first one is to illustrate the significance of distribution transformer no-load loss in periods of high electric energy cost and the second goal is the presentation of a novel numerical methodology for wound core transformers no-load loss analysis, enabling to determine the economically and technically optimum transformer for every use.

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Periodical:

Materials Science Forum (Volume 721)

Pages:

269-274

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.721.269

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Online since:

June 2012

Authors:

Themistoklis D. Kefalas, Antonios Kladas

Keywords:

Computer Aided Analysis, Finite Element Method (FEM), Magnetic Core, Nonlinear Magnetics, Numerical Analysis, Power Transformer

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