Analytical method for calculation of electromagnetic fields from armoured HVAC cables

Abstract

With the proliferation of HVAC armoured cables in offshore wind applications, the provision of methods for the calculation of both magnetic and electric field effects from HV cables is of high importance for consenting processes associated with offshore wind development and biological experiments. Despite electro-reception of marine animals being a known phenomenon, the electric fields present outside of HVAC cables, mostly induced as a result of the time-varying magnetic vector potential, have not been thoroughly analysed in literature. The available methods for the calculation of magnetic fields are often complex and require an expert user. In this work, this knowledge gap is addressed through the development of an analytical method, with some parameters derived from simple numerical simulations, that can be applied to both magnetic and electric fields and by provision of MATLAB code for calculation of both effects. The presented method includes the impact of metallic sheaths, cable twist, and magnetic armour. For the development of electric field expressions, the impact of the insulating layer at the cable outer boundary is considered. The presented results are within 3% of the numerical solution for the magnetic and electric field norm and within 5% for the individual components of the fields.

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Identifiers

ORCID for Joanna Rzempoluch: orcid.org/0009-0003-4810-8627

ORCID for Sunny Chaudhary: orcid.org/0000-0003-2664-7083

ORCID for Justin Dix: orcid.org/0000-0003-2905-5403

ORCID for Paul Lewin: orcid.org/0000-0002-3299-2556

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