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The great expansion in offshore power plants is raising the concern regardingthe cumulative effect of the electromagnetic field emissions caused bysubmarine power cables. In this sense, owners are required to predict theseemissions during the permitting and consenting process of new power plants.This is a challenging task, especially in the case of HVAC three-core armoredcables due to their complex geometry. Customarily, 2D approaches based on thefinite element method (FEM) have been employed for evaluating the magneticfield emissions caused by these cables. However, inaccurate results areobtained since the phase conductors and armor twisting is omitted. This workdevelops, for the first time in the literature, an in-depth analysis of themagnetic field caused by this type of cable through an ultra-shortened 3D-FEMmodel, which is also faced to experimental measurements taken on an actual 132kV, 800 mm2 three-core armored cable. Relevant conclusions are derivedregarding the impact of the cable design on the magnetic field emissions,including material properties, as well as single and double-layer armors,presenting the proposed model not only as a valuable tool for predictingpurposes, but also for optimizing cable design in terms of magnetic fieldemissions.

Evaluation of the power frequency magnetic field generated by three-core armored cables through 3D finite element simulations