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New Insulation Materials for Smart Power Equipment

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "D1: Advanced Energy Materials".

Deadline for manuscript submissions: 10 August 2024 | Viewed by 4612

Special Issue Editors


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Guest Editor
Department of Electrical and Electronic Engineering, Glasgow Caledonian University, Glasgow G4 0BA, UK
Interests: insulation coordination; outdoor insulators; electromagnetic transients in power systems

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Guest Editor
LIMES, Department of Electrical, Electronic and Information Engineering, University of Bologna, Bologna, Italy
Interests: electrical technologies; nanomaterials; diagnosis of electrical apparatus; electrospinning
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Special Issue Information

Dear Colleagues,

Considering the rapid technological advancement, smart dielectric materials are expected to be designed, manufactured, and utilized for the next generation of power system equipment and networks. In addition to the traditional characteristics of insulation materials, which are necessary for reliable operation of the power network, these materials provide extra benefits that make them attractive for the next generation of power systems to accommodate better use of renewable energies and integration into a smart, self-healing power grid.

Considering the fast growth of research and development in these dielectric materials, this Special Issue will be focused on all aspects of design, manufacturing, and utilization of new insulation materials proposed for use in the smart power equipment and network.

Researchers from relevant field are encouraged to submit their original papers related to the above topics, particularly including but not restricted to:

  • Smart materials for energy applications, e.g., electroactive polymers, electrets, piezoelectric materials for energy harvesting and sensing;
  • Functional materials for both HVDC and HVAC applications, with the purpose of space charge reduction and better withstanding of partial discharge activity;
  • Advanced self-healing materials for high voltage applications.

Dr. Shahab Farokhi
Dr. Davide Fabiani
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

  • Dielectric and electrical insulation
  • Smart insulation materials
  • Self-healing dielectrics

Published Papers (2 papers)

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Review

23 pages, 4582 KiB  
Review
Electrical Conduction in Thin-Film Polypropylene Capacitors
by Marco Michelazzi and Davide Fabiani
Energies 2023, 16(18), 6631; https://0-doi-org.brum.beds.ac.uk/10.3390/en16186631 - 15 Sep 2023
Cited by 3 | Viewed by 1001
Abstract
Thin polypropylene films have played a strategic role in recent years because they are the dielectric of choice for high-energy-density and high-power-density DC-link capacitors, and have been extensively used in renewable energy and electric mobility applications. Currently, these capacitors operate at temperatures of [...] Read more.
Thin polypropylene films have played a strategic role in recent years because they are the dielectric of choice for high-energy-density and high-power-density DC-link capacitors, and have been extensively used in renewable energy and electric mobility applications. Currently, these capacitors operate at temperatures of up to 105 °C with electric fields of up to 200 V/µm, allowing high efficiency due to their low dissipation figures compared to other capacitor technologies. The rapid evolution of green energy applications demands higher energy and power density, with expected operating temperatures and electric fields of up to 115 °C and above 250 V/µm, respectively. Under such conditions, the insulation resistance of the capacitor becomes a key factor, as it may start to contribute to the dissipation of energy. A correct understanding of conduction phenomena within the dielectric is necessary for the design of new high-performance capacitors based on polypropylene film with reduced conduction losses. The scope of this review is to present and evaluate the theoretical and experimental works on thin biaxially oriented polypropylene (BOPP) films for capacitor applications with a focus on electrical conductivity at high electric field and temperature. Full article
(This article belongs to the Special Issue New Insulation Materials for Smart Power Equipment)
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23 pages, 4181 KiB  
Review
Natural Esters for Green Transformers: Challenges and Keys for Improved Serviceability
by Samson Okikiola Oparanti, Ungarala Mohan Rao and Issouf Fofana
Energies 2023, 16(1), 61; https://0-doi-org.brum.beds.ac.uk/10.3390/en16010061 - 21 Dec 2022
Cited by 10 | Viewed by 3208
Abstract
The service of mineral insulating oils for power transformer insulation and cooling aspects cannot be disavowed. However, the continued use of mineral oils is questionable due to environmental unfriendliness and the divestment from fossil fuels. This has provoked the quest for green alternative [...] Read more.
The service of mineral insulating oils for power transformer insulation and cooling aspects cannot be disavowed. However, the continued use of mineral oils is questionable due to environmental unfriendliness and the divestment from fossil fuels. This has provoked the quest for green alternative insulating liquids for high-voltage insulation. Natural esters are among the remaining alternatives that are renewable and environmentally friendly. Regardless of their environmental and technical merits, natural esters have some limitations that are slowing down their total acceptance by transformer owners and utilities. Critical limitations and concerns include esters’ pour point, viscosity, oxidative stability, and ionization resistance. In this work, the state of the art of “natural esters for transformers” is explored with the aim of potential improvements. The sections of the article are geared towards technical viewpoints on improving the overall workability and serviceability of natural esters in high-voltage applications. A comprehensive review of the existing literature is achieved, based on performance improvements of the natural ester using “additives” and “chemical modification”. The authors hope that this report may be helpful to transformer owners as well as influence the progression of natural esters for power transformer applications. Full article
(This article belongs to the Special Issue New Insulation Materials for Smart Power Equipment)
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