The Influence of Transmission Corridor Tower Grounding Electrode Shapes on the Impulse Interference of Adjacent Secondary Cables
With urban land resources becoming increasingly scarce, transmission corridors are often situated close to substations and buildings. When a transmission tower is struck by lightning, the resulting transient current enters the ground through the grounding electrode, causing varying degrees of ele...
| 發表在: | Advances in Electrical and Computer Engineering |
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| Main Authors: | , , |
| 格式: | Article |
| 語言: | 英语 |
| 出版: |
Stefan cel Mare University of Suceava
2025-10-01
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| 主題: | |
| 在線閱讀: | http://dx.doi.org/10.4316/AECE.2025.03001 |
| 總結: | With urban land resources becoming increasingly scarce, transmission corridors are often situated
close to substations and buildings. When a transmission tower is struck by lightning, the
resulting transient current enters the ground through the grounding electrode, causing
varying degrees of electromagnetic interference to nearby double-ended grounded secondary
cables. This interference can damage equipment and disrupt signals. To study this effect
and propose protective measures, this study uses CDEGS software to create a combined
electromagnetic model of the tower grounding electrode, main grounding grid, and buried
secondary cables. Numerical calculations show that the tower grounding electrode shape
and cable grounding method significantly affect the shielding layer coupling current.
While soil resistivity has a minor impact, increasing lightning current amplitude boosts
the coupling current. However, the results vary with soil resistivity and grounding
methods. Increasing component spacing and using shielding wires effectively reduce
the shielding layer coupling current. These findings highlight the need to consider
electromagnetic impacts on secondary systems in urban transmission tower design,
crucial for grounding system electromagnetic compatibility analysis. |
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| ISSN: | 1582-7445 1844-7600 |