Investigation on the Electrothermal Performance of a High-Temperature Superconducting Cable in an Offshore Wind Farm Integrated Power System: Fault and Islanding Conditions

The main contribution of this article is to study the electrothermal performance of a 22.9 kV high-temperature superconducting (HTS) AC cable under transients, such as short-circuit faults and islanding operating mode (IOM) of a wind farm. For this purpose, an HTS cable connects a 12 MVA doubly fed induction generator-based wind farm to the load center under two different scenarios of the grid. In the first scenario, the upstream grid is located far from the load center and most of the demanded load is supplied by the wind farm, while in the second scenario, a part of the load is supplied by the wind farm and the rest is supplied by the upstream grid located near the load center. In case of faults and transients in the upstream grid, protection systems isolate the wind farm, and thus, it operates in a specific mode, called IOM. Results indicated that the location of faults and transients, especially IOMs, plays a significant role in the electrothermal performance of HTS cable.