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

• DOI: 10.1016/j.epsr.2022.108701
• Publication Date: 2022-08-11T00:02:58Z
• Authors: Juan Carlos del-P...; Pedro Cruz-Romero; Juan Carlos Bravo...
• Keywords: Finite element method; Armor; Experimental measurements; finite element method; magnetic field; experimental measurements; 02 engineering and technology; Three-core cable; armor; Electrical Engineering and Systems Science - Systems and Control; 7. Clean energy; three-core cable; Magnetic field; 0202 electrical engineering, electronic engineering, information engineering

The great expansion in offshore power plants is raising the concern regarding the cumulative effect of the electromagnetic field emissions caused by submarine power cables. In this sense, owners are required to predict these emissions during the permitting and consenting process of new power plants. This is a challenging task, especially in the case of HVAC three-core armored cables due to their complex geometry. Customarily, 2D approaches based on the finite element method (FEM) have been employed for evaluating the magnetic field emissions caused by these cables. However, inaccurate results are obtained since the phase conductors and armor twisting is omitted. This work develops, for the first time in the literature, an in-depth analysis of the magnetic field caused by this type of cable through an ultra-shortened 3D-FEM model, which is also faced to experimental measurements taken on an actual 132 kV, 800 mm2 three-core armored cable. Relevant conclusions are derived regarding 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 predicting purposes, but also for optimizing cable design in terms of magnetic field emissions.