Indirect Electrostatic Discharge (ESD) Effects on Shielded Components Installed in MV/LV Substations

Giuseppe Attolini, Salvatore Celozzi () and Erika Stracqualursi
Additional contact information
Giuseppe Attolini: Electrical Engineering Division of DIAEE, University of Rome “Sapienza”, Via Eudossiana 18, 00184 Rome, Italy
Salvatore Celozzi: Electrical Engineering Division of DIAEE, University of Rome “Sapienza”, Via Eudossiana 18, 00184 Rome, Italy
Erika Stracqualursi: Electrical Engineering Division of DIAEE, University of Rome “Sapienza”, Via Eudossiana 18, 00184 Rome, Italy

Energies, 2025, vol. 18, issue 5, 1-18

Abstract: Standards describing the test procedures recommended to investigate the shielding effectiveness of enclosures have two major issues: they generally prescribe the assessment of the electromagnetic field of empty cavities, and they do not deal with very small enclosures. However, the dimensions of some very common shielded apparatus are smaller than those considered in the standards and the electromagnetic field distribution inside the shielded structure is strongly affected by the enclosure content. In this paper, both issues have been investigated for two components commonly used in medium voltage/low voltage (MV/LV) substations: a mini personal computer used to store, process, and transmit relevant data on the status of the electric network, with these aspects being essential in smart grids, and an electronic relay which is ubiquitous in MV/LV substations. Both components are partially contained in a metallic enclosure which provides a certain amount of electromagnetic shielding against external interferences. It is observed that an electrostatic discharge may cause a failure and/or a loss of data, requiring an improvement of shielding characteristics or a wise choice of the positions where the most sensitive devices are installed inside the enclosure. Since the dimensions of very small enclosures, fully occupied by their internal components, do not allow for the insertion of sensors inside the protected volume, numerical analysis is considered as the only way for the appraisal of the effects induced by a typical source of interference, such as an electrostatic discharge.

Keywords: electromagnetic shielding; power components; radiated immunity; electrostatic discharge current; MV/LV substation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/18/5/1056/pdf (application/pdf)
https://www.mdpi.com/1996-1073/18/5/1056/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:18:y:2025:i:5:p:1056-:d:1596846

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().