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

Author

Listed:
  • 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)

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.

Suggested Citation

  • Giuseppe Attolini & Salvatore Celozzi & Erika Stracqualursi, 2025. "Indirect Electrostatic Discharge (ESD) Effects on Shielded Components Installed in MV/LV Substations," Energies, MDPI, vol. 18(5), pages 1-18, February.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:5:p:1056-:d:1596846
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    References listed on IDEAS

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    1. Ammar Abbas Majeed & Ahmed Sabri Altaie & Mohamed Abderrahim & Afaneen Alkhazraji, 2023. "A Review of Protection Schemes for Electrical Distribution Networks with Green Distributed Generation," Energies, MDPI, vol. 16(22), pages 1-31, November.
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