Simulation analysis of metal sheath and Armor loss of DC submarine cable based on COMSOL

Abstract

Abstract The construction of submarine cable is recognized as a highly complex and difficult subject and project all over the world. Due to the special environment of the seabed, the submarine photoelectric composite cable needs protection. So armor was added. This makes the structure more complex and restricts the current carrying capacity. The loss of armor and metal sheath is the key factor restricting the current carrying capacity. Based on the finite element analysis method and COMSOL Multiphysics, this paper simulates and analyses the single core DC cable, and quantitatively explores the influence of different properties of armor materials on metal sheath and armor loss. It is concluded that the relative permeability of steel wire armor has a greater impact than conductivity in practical engineering, and the total loss of cable tends to be stable under high permeability. It has practical value and special significance for cable engineering construction.