AN ANALYTICAL METHOD FOR CALCULATING CURRENT-CARRYING CAPACITYOF HIGH VOLTAGE UNDERGROUND CABLE IN DIFFERENT INSTALLATION CONDITIONS

Abstract

High-voltage underground cable are generally designed according to thermal criteria. The current-carrying capacity depends on the permissible temperature inside the insulation. In addition to that, various installation conditions affect the current ratingdifferently. At present, the major current-carrying capacity calculations of high voltage cable system are based on IEC-60287 standard. However, this standard’scalculation limits located in installation conditions, whether the single-core cable system was laid in flat or trefoil formation. Simultanously, the pratical installation conditions can vary according to cable routes. This paper presents an analytical method based on Maxwell equations that allows calculating the current-carrying capacity of cable system in any installation condition, and is suitable for single or multi-link cables.