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Evaluation of the Electromagnetic Environment Around Underground HVDC Lines

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5 Author(s)
Luca Zilberti ; Istituto Nazionale di Ricerca Metrologica, Torino, Italy ; Enrico Pons ; Oriano Bottauscio ; Mario Chiampi
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This paper analyses the magnetic-field emissions of a high-voltage dc transmission line constituted by two couples of underground cables laid along a highway. The transmission system, including all its components (transformers, converters filters, and line), is modeled through a circuital approach, which provides the distribution of the current harmonics along the line length. The magnetic field produced in the environment is then estimated by a hybrid finite element/boundary element method. The electromagnetic interferences with existing appliances and the human exposure to magnetic fields are investigated considering different laying configurations, conductor dispositions, and supply conditions. Compliance with regulations limiting human exposure and technical standards ensuring electromagnetic compatibility of appliances and devices are assessed.

Published in:

IEEE Transactions on Power Delivery  (Volume:25 ,  Issue: 4 )