Haq, Inzamam Ul, Clark, David  ORCID: https://orcid.org/0000-0002-1090-2361, Haddad, Manu ORCID: https://orcid.org/0000-0003-4153-6146, Albano, Maurizio ORCID: https://orcid.org/0000-0002-5486-4299, Robson, Stephen ORCID: https://orcid.org/0000-0003-3156-1487, Justo de Araujo, Anderson Ricardo, Nuttall, Barry, Guo, Dongsheng and Hayes, Kerri
2025.
Evaluation of induced voltages and currents in 400kV double circuit tunnel power cables.
Presented at: 60th International Universities Power Engineering Conference,
London, UK,
02-05 September 2025.
2025 60th International Universities Power Engineering Conference (UPEC).
IEEE,
10.1109/upec65436.2025.11279838
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Abstract
Routine maintenance activities in multi-circuit cable tunnels often involve work on individual de-energized circuits, while adjacent circuits remain live. Electromagnetic coupling with live circuits results in induced voltages and currents on the de-energized cables. These may present a significant safety hazard to maintenance personnel if not properly identified and mitigated. In this paper we model a double circuit cable tunnel using ATP-EMTP to compute the induced voltages and currents in a de-energised circuit due to steady state operation of the adjacent live circuit. The cable length is 18 km, jointed at approximately 1km intervals. The simulations are performed considering the different load and fault conditions, including nominal load, 10% imbalance load, 3-phase faults, single-phase faults and phase-phase faults. Two different earthing scenarios of the de-energised cable circuit are considered. Results show that induced voltages and currents in the de-energized circuit depend greatly on the earthing configuration of cable sheaths and conductors. The designed model of the tunnel cable system and the study can be used as a reference document to identify the safe working methods for maintenance on tunnel power cables.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Date Type: | Published Online |
| Status: | Published |
| Schools: | Schools > Engineering |
| Publisher: | IEEE |
| ISBN: | 9798331565213 |
| Date of First Compliant Deposit: | 8 January 2026 |
| Date of Acceptance: | 19 June 2025 |
| Last Modified: | 08 Jan 2026 15:30 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/183712 |
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