Cooperative Operation of Superconducting Fault-Current-Limiting Cable and SMES System for Grounding Fault Protection in a LVDC Network

This paper investigates grounding fault protection characteristics in a novel low-voltage direct-current power transmission, distribution, and utilization network integrated with multiple fault-current-limiting (FCL) superconducting cables (SCs) and multiple superconducting magnetic energy storage (SMES) devices. The effectively integrated system is highlighted with a self-acting fault current limitation feature of the FCL SC and a fast-response grid voltage protection feature of the SMES. The simulation results show that the cooperative operations of the FCL SC and the SMES are favorable for achieving advanced fault current limitation, fault-ride-through capability enhancement and critical load protection during a grounding fault.