Citation

Lopez-Fernandez, X.M. (2012), "Editorial", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 31 No. 2. https://doi.org/10.1108/compel.2012.17431baa.001

Publisher

:

Emerald Group Publishing Limited

Copyright © 2012, Emerald Group Publishing Limited


Editorial

Article Type:Editorial From: COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, Volume 31, Issue 2

This issue contains a Special Section devoted to selected papers from The 3rd International Advanced Research Workshop on Transformers (ARWtr2010) which was held in the Hotel Parador Hostal dos Reis Católicos, in Santiago de Compostela, Spain on October 3-6, 2010.

ARWtr conferences are being organized every third year to provide a meeting of specialists from industrial, academic and research world engaged in an intense exchange of practical knowledge and the establishment of collaboration links on new trends and issues of transformers. It was initiated in 2004 in Vigo, following Baiona in 2007 and this last edition in Santiago de Compostela. The next edition will be held in 2013.

After the ARWtr2004, ARWtr2007 and ARWtr2010, the most important fact is that it gathers a relatively small, but strongly connected and faithful group of outstanding specialists within transformer area. We believe that it is the best guarantee for further flourishing development of this specific workshop, which first objective is the practical application in such sophisticated subject.

The third ARWtr collected into the areas of power, instrument and frequency transformers the following main topics:

  • application;

  • requirements;

  • design and testing;

  • diagnostic;

  • maintenance;

  • materials;

  • economics; and

  • new technology.

Where structure of ARWtr2010 consisted of:

  • oral sessions/key speakers;

  • poster sessions;

  • commercial exhibitions;

  • technical visit and social events; and

  • tutorials.

Those presented works in this edition at poster sessions could be submitted again after the workshop for a second review by ARWtr2010 International Technical Committee/Editorial Board. Therefore, each selected paper was reviewed and improved in a peer-review process by at least two reviewers.

This present issue of COMPEL contains seven selected papers. This selection, however, gave a number of papers much bigger than the number imposed by COMPEL. Thus, it was also took into account a special factor, namely the specific character of COMPEL.

To introduce a prospective reader into this Special Section contents very short descriptions of the papers are listed in the following:

  • Study of very fast transient overvoltages (VFTOs) in the secondary winding of air-cored Tesla transformers.

  • Proposal of a coefficient, time domain severity factor (TDSF), which permits to assess the severity of the internal transient response along transformer windings due to the switching operation.

  • Proposal of an anisotropic model in order to consider laminated wound cores integrated to in the 2D and 3D FEM.

  • Comprehensive presentation of various safety factors that need to be determined while assessing the short-circuit strength of transformers.

  • Application of a 3D methodology to assess the heating hazard on transformer covers and present a practical tool to design amagnetic inserts arrangements.

  • Determination of the external magnetic field density of the traction transformer for electric multiple unit (EMU) and implementation of the model for its computation.

  • Presentation of a new type of equivalent scheme of multi-winding transformers.

Since the final selected papers collected in this issue of COMPEL was possible due to the stimulation created by The International Advanced Research Workshop on Transformers (ARWtr), we would like to thank to the Cigre Spanish and Portuguese National Committees, Cigre Study Committee A2 Transformers and IEEE PES Spanish for their auspice, without forgetting the invaluable support gave by the following institutions and companies: Universidade de Vigo, Technical University of Lodz, Spanish Ministry of Science and Technology, Xunta de Galicia Autonomous Government, EFACEC Energía, ARTECHE, WEIDMANN, REE, REN, MR, ABB, HSP, ENPAY, Gas Natural Fenosa, IBERDROLA, DOBLE, NYNAS, OMICRON, Du Pont, Unitronics Electric, Megger, GE Energy, KELMAN, ENERGY Support, CST, INDIELEC and CEDRAT. And last but not least, our gratitude to Emerald Group Publishing.

Xose M. Lopez-FernandezARWtr General Chairman

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