Parameters affecting the ampacity of HVDC submarine power cables

This paper explains some parameters that affect the ampacity of HVDC submarine power cables. The parameters include ambient temperature, burial depth, and spacing distance between two cables. The analytical computation of cable ampacity is carried out in steady-state conditions. Internal, external, and mutual thermal resistances of power cables are taken into account in the calculation. The ampacity calculation is applied to a single conductor armored mass-impregnated polypropylene laminated paper (MI-PPLP) submarine cable. The HVDC system which has bipolar configuration with earth return is considered as a case study. The calculation results of cable ampacity are presented and discussed.