Progress In Electromagnetics Research
ISSN: 1070-4698, E-ISSN: 1559-8985
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By P. Sergeant and S. Koroglu

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The electromagnetic losses and shielding efficiency of shields for a buried three phase high voltage cable are studied for several shielding configurations. The shields are U-shaped gutters covered with plates, and the power cables are positioned either in trefoil or in flat configuration. The shielding efficiency and the losses are compared for shields with the same geometry but several shielding materials: aluminium, and two ferromagnetic steel grades. The numerical models are validated with experimental results. From the experiments, it is observed that the average reducing factor of the flux density is about 7 with the flat cable configuration while the average reducing factor of the flux density is about 5 with the trefoil cable configuration. But the power losses in the DX52 shield for trefoil configuration is about 40% lower compared to the flat configuration. In case of trefoil configuration, the losses are 12.41 W/m per meter length in the shield for a current of 750 A. Next to the shield material and the cable configuration, the paper investigates the influence of several parameters on both the shielding efficiency and the losses: the size of the shield, the current amplitude in the cable and the thickness of the shield.

P. Sergeant and S. Koroglu, "Electromagnetic Losses in Magnetic Shields for Buried High Voltage Cables," Progress In Electromagnetics Research, Vol. 115, 441-460, 2011.

1. Banfai, B., G. G. Karady, C. J. Kim, and K. B. Maracas, "Magnetic field effects on CRT computer monitors," IEEE Transactions on Power Delivery, Vol. 15, No. 1, 307-312, 2000.

2. Santoro, N., A. Lisi, D. Pozzi, E. Pasquali, A. Serafino, and S. Grimaldi, "Effect of extremely low frequency (ELF) magnetic field exposure on morphological and biophysical properties of human lymphoid cell line (Raji)," Biochimica et Biophysica Acta, Vol. 1357, 281-290, 1997.

3. Villeneuvea, P. J., D. A. Agnewc, K. C. Johnsona, Y. Maoa, and the Canadian Cancer Registries Epidemiology Research Group, "Brain cancer and occupational exposure to magnetic fields among men: Results from a Canadian population-based case-control study," International Journal of Epidemiology, Vol. 31, No. 1, 210-217, 2002.

4. 2004/40/EC, "Directive of the European Parliament and of the Council of 29th April 2004 on the minimum health and safety requirements regarding the exposure of workers to the risks arising from physical agents (electromagnetic fields)," Official Journal of the EU, No. L184, 1-9, May 24, 2004, [http://www.hse.gov.uk/radiation/nonionising/l184emf.pdf, accessed Mar. 21, 2011].

5. Habiballah, I. O., A. S. Farag, M. M. Dawoud, and A. Firoz, "Underground cable magnetic field simulation and management using new design configurations," Electric Power Systems Research, Vol. 45, 141-148, 1998.

6. Dawoud, M. M., I. O. Habiballah, A. S. Farag, and A. Firoz, "Magnetic field management techniques in transmission underground cables," Electric Power Systems Research, Vol. 48, 177-192, 1999.

7. López, J. C. P. and P. C. Romero, "The effectiveness of compensated passive loops for mitigating underground power cable magnetic fields," IEEE Transactions on Power Delivery, Vol. 99, 1-10, 2010.

8. Faghihi, F. and H. Heydari, "Reduction of leakage magnetic field in electromagnetic systems based on active shielding concept verified by eigenvalue analysis," Progress In Electromagnetics Research, Vol. 96, 217-236, 2009.

9. Sergeant, P., L. Dupré, and J. Melkebeek, "Magnetic shielding of buried high voltage cables by conductive metal plates," COMPEL, Vol. 27, No. 1, 170-180, 2008.

10. Zucca, M., G. Lorusso, F. Fiorillo, P. E. Roccato, and M. Annibale, "Highly efficient shielding of high-voltage underground power lines by pure iron screens," J. Magn. Magn. Mater., Vol. 320, 1065-1069, 2008.

11. De Wulf, M., P. Wouters, P. Sergeant, L. Dupré, E. Hoferlin, S. Jacobs, and P. Harlet, "Electromagnetic shielding of high-voltage cables," J. Magn. Magn. Mater., Vol. 316, 908-911, 2007.

12. Xu, X.-B. and G. Liu, "Investigation of the magnetic field produced by unbalanced phase current in an underground three-phase pipe-type cable," Electric Power Systems Research, Vol. 62, 153-160, 2002.

13. Koroglu, S., P. Sergeant, R. Sabariego, V. D. Quoc, and M. D. Wulf, Influence of contact resistance on shielding efficiency of shielding gutters for HV cables, 14th Biennial IEEE Conference on Electromagnetic Field Computation, Chicago, USA, May 9--12, 2010.

14. Xu, X. and X. Yang, "A hybrid formulation based on unimoment method for investigating the electromagnetic shielding of sources within a steel pipe," Progress In Electromagnetics Research, Vol. 12, 133-157, 1996.

15. Kuang, J. and S. A. Boggs, "Pipe-type cable losses for balanced and unbalanced currents," IEEE Transactions on Power Delivery, Vol. 17, No. 2, 313-317, 2002.

16. Moutassem, W. and G. J. Anders, "Calculation of the eddy current and hysteresis losses in sheathed cables inside a steel pipe," IEEE Transactions on Power Delivery, Vol. 25, No. 4, 2054-2063, 2010.

17. Bertotti, G., Hysteresis in Magnetism, Academic Press, San Diego, 1998.

18. Bertotti, G., "General properties of power losses in soft ferromagnetic materials," IEEE Transactions on Magnetics, Vol. 24, No. 1, 621-630, 1988.

19. Dupré, L., G. Bertotti, V. Basso, F. Fiorillo, and J. Melkebeek, "Generalisation of the dynamic preisach model toward grain oriented Fe-Si alloys," Physica B: Condensed Matter, Vol. 275, No. 1--3, 202-206, 2000.

20. Permiakov, V., L. Dupré, A. Pulnikov, and J. Melkebeek, "Loss separation and parameters for hysteresis modelling under compressive and tensile stresses," J. Magn. Magn. Mater., Vol. 272--276, 553-554, 2004.

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