ANALYSIS ON THREE-CORE LEAD-SHEATHED HVAC SUBMARINE CABLE WITH TWISTED MAGNETIC ARMOR BASED ON BONDING TYPES USING COMSOL MULTIPHYSICS

Abstract

As the appeal and stockpile of energy increases, the quest for natural energy becomes incredibly essential due to the rapid commercial growth of several developing countries worldwide. The three-core lead sheathed XLPE HVAC submarine cable became very familiar for the long transmission lines. However, it has some restrictions, such as the need for reactive power compensation and types of bonding used. This research is intended to demonstrate and discuss best practise in setting up models and running simulations on a three-core lead sheathed XLPE HVAC submarine cable on how the bonding types influenced the cable's ampacity. Submarine cable ampacity indicates the current-carrying capacity at the optimum working temperature in a steady-state condition, with the laying system and constant environmental exposure. Massive reactive power needs to be generated due to increased conductor capacitance, leading to higher cable current ratings, losses, and costly umbilical capacity. The bonding types must be considered when constructing the submarine cable because it is well-known to affect the power loss of the submarine power cables. The finite element method AC/DC used in this modelling of the submarine cable, which established respectively in the Comsol Multiphysics software to analyse the current build-up for various bonding types as well as the corresponding losses in the submarine cable screen. Based on the conducted simulation, the suitable type of bonding method used for the submarine power cable based on different lengths is the cross bonding type. The charging current and losses per cable screen do not vary along the cable for each type of bonding type and its change with the cable length.