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Lightning Electromagnetic Fields Research
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Lightning Electromagnetic Fields Research

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Electrical, Electronics and Communications Engineering".

Deadline for manuscript submissions: closed (20 March 2025) | Viewed by 2341

Special Issue Editors

Dr. Daniele Mestriner

E-Mail Website
Guest Editor
Naval, ICT and Electrical Engineering Department (DITEN), University of Genoa, 16145 Genoa, Italy
Interests: lightning; EMC; HVDC
Special Issues, Collections and Topics in MDPI journals
Dr. Massimo Brignone

E-Mail Website
Guest Editor
Naval, ICT and Electrical Engineering Department (DITEN), University of Genoa, 16145 Genoa, Italy
Interests: electromagnetic fields; lightning modelling; optimization; microgrid and renewables
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The evaluation of electromagnetic fields generated by lightning discharges is extremely important in order to guarantee the reliability of electrical and electronic systems as well as the people safety. Modeling, analysis and numerical considerations represent crucial issues to be addressed in order to provide innovative solutions in the lightning protection field.

Researchers around the world are welcomed to provide their contribution in the field, focusing on innovative methods for the computation, analysis on particular frameworks where the protection should be enhanced and new models able to provide better insights in the lightning phenomenon.

Dr. Daniele Mestriner
Dr. Massimo Brignone
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. Applied Sciences 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 2400 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

  • EMC
  • lightning protection
  • numerical analysis
  • FEM
  • FDTD
  • shielding
  • discharges

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Published Papers (2 papers)

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Research

15 pages, 2170 KiB  
Article
Estimation of Effective Length of Type-A Grounding System According to IEC 62305-3 Using a Machine Learning Regression Model
by Dino Lovrić, Ivan Krolo and Ivica Jurić-Grgić
Appl. Sci. 2024, 14(16), 6945; https://doi.org/10.3390/app14166945 - 8 Aug 2024
Cited by 1 | Viewed by 836
Abstract
Two types of grounding systems are recommended for use in the international standard IEC 62305-3, Part 3: Physical damage to structures and life hazard. One of these is a radial-based grounding system (type-A), which is used in soil resistivities of up to 3000 [...] Read more.
Two types of grounding systems are recommended for use in the international standard IEC 62305-3, Part 3: Physical damage to structures and life hazard. One of these is a radial-based grounding system (type-A), which is used in soil resistivities of up to 3000 Ωm and is considered in this paper. It is a well-known fact that during lightning strikes, only a part of the grounding wire contributes to dissipating the lightning current into the surrounding soil. This effective part of the grounding system depends on several features, such as soil resistivity, burial depth, and rise time of the dissipated lightning current. The effect of all of these features on the effective length of the type-A grounding system is explored in this paper. A suitable supervised machine learning regression model is developed, which will enable readers to accurately approximate the effective length of the type-A grounding system for realistic values of input features. The trained model in the paper yielded an R2 value of 0.99998 on the test set. In addition, two simple mathematical formulas are also provided, which produce similar but less accurate results (R2 values of 0.989883 and 0.998557, respectively). Full article
(This article belongs to the Special Issue Lightning Electromagnetic Fields Research)
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22 pages, 7001 KiB  
Article
Green Flashes Observed in Optical and Infrared during an Extreme Electric Storm
by Gilbert Green and Naomi Watanabe
Appl. Sci. 2024, 14(16), 6938; https://doi.org/10.3390/app14166938 - 8 Aug 2024
Viewed by 970
Abstract
A strong and fast-moving electrical storm occurred in the Southwest Florida region overnight, from 01:00 UTC on 17 April to 07:00 UTC on 17 April 2023. Video recordings were conducted in the region at Latitude N 26.34° and Longitude W 81.79° for 5 [...] Read more.
A strong and fast-moving electrical storm occurred in the Southwest Florida region overnight, from 01:00 UTC on 17 April to 07:00 UTC on 17 April 2023. Video recordings were conducted in the region at Latitude N 26.34° and Longitude W 81.79° for 5 h and 15 min, from 01:45 UTC to 07:00 UTC. The camera captured the flashes transforming from pinkish, violet, blue, and then emerald green in the sky twice: the first colored flash lasted 2.0 s, and the second one lasted 0.5 s. The characteristics of the flashes were analyzed using video images integrated with lightning flash data from the Geostationary Lightning Mapper (GLM). To gain deeper insights into the associated atmospheric conditions, the Advanced Baseline Imager (ABI) was also used to help understand the spectral anomalies. Both events had similarities: the same pattern of changing luminous colors in the optical images and the trajectory of the lightning discharges, showing clusters and horizontal distributions. Event 1 occurred mainly over the ocean and featured more intense storms, heavier rain, and denser, higher cloud-tops compared to Event 2, which occurred inland and involved dissipating storms. Moreover, the group energy detected in Event 1 was an order of magnitude higher than in Event 2. We attribute the wavelength of the recorded colored luminosity to varying atmospheric molecular concentrations, which ultimately contributed to the unique spectral line. In this study, we explore the correlation between colored flashes and specific atmospheric concentrations. Full article
(This article belongs to the Special Issue Lightning Electromagnetic Fields Research)
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