Capri-Torre Annunziata 150 kV Three-Core Armoured Submarine Cable: A First 3D Multiconductor Cell Analysis Confirmation

In this paper, an experimental validation of the generalized multiconductor cell analysis (with acronym MCA) is presented. MCA is based on an extensive and advanced use of three-dimensional matrix algebra, which allows self-made procedures to be implemented in any standard computer by means of a mathematical software (e.g. Matlab). MCA has been applied to three-core single lead-screened armoured cables where cores and armour wires are wound helically with different lengths of lay. The experimental validation comes from a measurement campaign on the 29,5 km long Capri – Torre Annunziata three-core submarine cable link. All the theoretical conclusions derived by the authors through the development and application of MCA method are experimentally confirmed and the model has a first validation. The maximum difference between MCA results and measurements is 7 % on the positive sequence resistance at power frequency f=50 Hz. Therefore, the same difference occurs in power losses evaluation. A 9,1 % difference occurs in the evaluation of positive sequence reactance.