Experimental Study of Electromagnetic Interference from Concentrated Discharge Channels within the Soil to Adjacent Directly Buried Cables during Lightning Current Inflow to the Ground

Tao Yuan (), Qian Chen, Rongquan Fan and Wenhui Zeng
Additional contact information
Tao Yuan: State Key Laboratory of Power Transmission Equipment Technology, Chongqing University, Chongqing 400044, China
Qian Chen: State Key Laboratory of Power Transmission Equipment Technology, Chongqing University, Chongqing 400044, China
Rongquan Fan: State Grid Sichuan Province Electric Power Company Electric Power Economy Technology Research Institute, Chongqing 610041, China
Wenhui Zeng: State Grid Sichuan Province Electric Power Company Electric Power Economy Technology Research Institute, Chongqing 610041, China

Energies, 2024, vol. 17, issue 15, 1-16

Abstract: Independent lightning rods are often installed in substation grounding systems for lightning protection. The concentrated discharge channel formed when a lightning current flows to the ground through a grounding electrode will cause electromagnetic interference to the directly buried secondary cable. And the three-dimensional structure of the discharge channel will affect the transient electromagnetic field distribution, thereby affecting the electromagnetic transients on cable shields. In order to explore the influence of soil discharge phenomena on the electromagnetic interference of the directly buried secondary cable, in this paper, we carried out experiments on cables in two different grounding modes, single-ended and double-ended grounding, and captured image of soil discharge channels. The results show that the cable grounding mode will affect the coupling mode that causes the shielding layer current. The relative spatial position of the soil discharge channel and the cable has a significant impact on the magnitude of the shielding layer current under both grounding modes. The water content and salt content of the soil also have different degrees of influence on the coupling current of the shielding layer in different grounding modes.

Keywords: grounding; electromagnetic interference; directly buried cable; lightning current dispersion; soil discharge channel (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: 2024
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/17/15/3852/pdf (application/pdf)
https://www.mdpi.com/1996-1073/17/15/3852/ (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:17:y:2024:i:15:p:3852-:d:1450282

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 ().