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Special Issue "6th International Colloquium "Transformer Research and Asset Management""

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "F: Electrical Engineering".

Deadline for manuscript submissions: 20 December 2023 | Viewed by 861

Special Issue Editors

Department of Electrical Engineering Fundamentals and Measurements, University of Zagreb, 10000 Zagreb, Croatia
Interests: computational electromagnetics; FEM; BEM; multiphysics; transformers
Končar Power Transformers, A joint Venture of Siemens Energy and Končar, 10090 Zagreb, Croatia
Interests: electromagnetics; FEM; optimization; power efficiency; Lean
KONČAR - Electrical Engineering Institute Ltd., BU Laboratory Center, Transformers Department, 10000 Zagreb, Croatia
Interests: transformers, transients, EMTP, modelling, measurements, FEM, electromagnetics
KONČAR - Electrical Engineering Institute Ltd., BU Laboratory Center, Transformers Department, 10000 Zagreb, Croatia
Interests: numerical modelling; electromagnetics; FEM; multiphysics; insulation, transients; transformers; measurements

Special Issue Information

Dear Colleagues,

Transformers are a vital part of the electrical transmission network, without which today's life is unthinkable. A demanding task is the development of transformers that, with minimal maintenance, can work for several decades. The scope of the Special Issue is not limited to the knowledge of the most critical aspects of power and instruments transformers and its components, such as: transformer insulating and magnetic materials, transformers oils, load tap changers, bushings and cooling system, but also includes transformer failures, loading, diagnostic testing, and on-line monitoring.

The theme of this Special Issue is, therefore, all aspects of interest to both manufacturers and power system operators.

Topics of interest for publication include, but are not limited to:

  • Power transformers technologies;
  • Instrument transformers technologies;
  • Numerical modelling in transformer design;
  • Properties and behaviours of insulating and magnetic materials and components;
  • Digitalization and smart-grid;
  • Transformer in-service experience;
  • Transformer failures, diagnostics;
  • Transformer monitoring, asset management and resilience.

Dr. Bojan Trkulja
Dr. Žarko Janić
Dr. Bruno Jurišić
Dr. Tomislav Župan
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • power transformers
  • instrument transformers
  • modelling
  • smart-grid
  • insulating and magnetic materials
  • diagnostics
  • failures

Published Papers (1 paper)

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Research

Article
Influence of Cooling Management to Transformer Efficiency and Ageing
Energies 2023, 16(12), 4626; https://doi.org/10.3390/en16124626 - 10 Jun 2023
Viewed by 530
Abstract
Transformer efficiency is a key concern for both transformer operators and regulators, particularly with regards to new transformers. Cooling is a critical factor in preventing overheating and controlling the ageing of transformer insulation. This paper aims to analyse how different cooling setups can [...] Read more.
Transformer efficiency is a key concern for both transformer operators and regulators, particularly with regards to new transformers. Cooling is a critical factor in preventing overheating and controlling the ageing of transformer insulation. This paper aims to analyse how different cooling setups can influence efficiency. Transformer losses depend on the winding temperature, which is affected by load, ambient temperature, and cooling power. In this study, we will take all of these factors into consideration to examine their impact on transformer losses. Using a 520 MVA transformer as an example, we will calculate the loss levels under different realistic ambient temperature and load profiles. We will also apply different cooling system settings to determine the optimization possibilities. Our calculations will consider different turn-on temperatures of the fans and cooling stages and will use steady state calculations over a period of 12 months. Additionally, a novel approach to control cooling by using the loading of the transformer is present, as are the possibilities of using variable speed fans. Finally, we will estimate the influence of cooling settings on transformer ageing by examining their impact on temperature. Full article
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