An Investigation into the Electromagnetic-ThermalHydraulic Behavior of in-Grid HTS Power Cables Utilizing Field-Circuit Method

Abstract

For years, high temperature superconducting (HTS) power cables have operated stably in grids, but their rarity of faults in demonstration projects has hindered reliability evaluations. This paper addresses this challenge by introducing the field-circuit coupling model for kilometer-long HTS cables, incorporating T-A electromagnetic and 3-D thermal-hydraulic modeling to simulate their transient behaviors during cooling system failures. The maximum fault duration and the allowable maximum maintenance time of 1.5 h and 72 h are determined, respectively. Finally, the recovery capabilities are also studied to verify the operating boundaries of in-grid cables under faults.