| Abstract |
In this article, we study the integration of high-temperature superconducting arm coils in a modularmultilevel converter (Cryo-MMC). With this integration, the fault current can be greatlyreduced by the increased resistance of the superconducting arm coils during fault condition. Wesimulate and compare the performance of the cryo-MMC and a conventional MMC under a DCsidepole-to-pole fault. The simulation results show that the Cryo-MMC reduces the DC-sidesurge current by 57\%, the peak arm currents by 65\%, and the peak AC-current by 73.7\% duringthe simulated fault. We also report the construction of the first cryo-MMC prototype that willexperimentally validate the integration of superconducting arm coils into a single-phase 6-levelMMC. |
