Abstarct: Abstract Superconducting cables, due to their extremely low electrical resistance at cryogenic temperatures, enable high current transmission with minimal losses. High-temperature superconductors (HTS) operate at relatively higher temperatures (around 70 Kelvin), reducing the need for expensive coolants like liquid helium, which is commonly used in low-temperature superconductors. The ability to manufacture more compact cables using HTS makes them highly suitable for modern power grids. Superconducting cables are considered one of the key components for electric power transmission in power systems. Given the various operational conditions of the power grid, understanding the behavior of superconducting cables under both steady-state and transient conditions is of great importance. Fault-induced current surges can raise the temperature of a superconducting cable, affecting its electrothermal properties and potentially damaging the superconducting tapes. Therefore, before deploying such cables in real networks, a comprehensive analysis of their electrothermal behavior under transient conditions is essential. This thesis investigates the performance of a 22.9 kV coaxial high-temperature superconducting cable with cold dielectric insulation in the presence of distributed generation (DG) baxsed on a doubly-fed induction generator (DFIG). In this study, a redesigned circuit model for the cable is proposed, capable of analyzing its electrothermal parameters. The performance of the superconducting cable under both steady-state and transient conditions is evaluated by varying factors such as DG capacity, line length, fault type, fault resistance, and fault duration baxsed on the proposed model. The obtained results emphasize the importance of examining the impacts of grid conditions on the behavior of superconducting cables. In general, the aim of this thesis is to investigate the behavior of a superconducting cable under different operational scenarios. The results indicate that network parameters significantly affect the operational states of the superconducting cable. An increase in fault resistance leads to a decrease in losses in the superconducting laxyer under resistive mode and a sharp increase in losses under flux flow mode. Changing the fault resistance from 0.01 to 10 ohms results in an 84% reduction in the input current to the cable and a transition to the flux flow region. Additionally, fault duration impacts the current-limiting characteristics of the superconducting cable, with the current-limiting index decreasing by 32% as the fault duration increases. This study presents a redesigned model capable of evaluating the electrothermal performance of a superconducting cable and highlights the importance of grid parameters in transient behavior analysis.