Abstract High-temperature superconductors (HTS) can be superconducting in liquid nitrogen (77 K) at atmospheric pressure, which holds immense promises for our future such as nuclear fusion, compact medical devices and efficient power applications. In a system, high short-circuit currents exceed the operational current by more than ten times, putting many parts of system risk. Superconducting fa...

A fast hotspot detection technique has been implemented and patented at École Polytechnique Fédérale de Lausanne (EPFL) under the European Union project FastGrid. The optical fibre sensing based uses Mach-Zehnder Interferometer (MZI) can detect even singular hotspots in superconductor within 15ms. MZI setup is very sensitive to external perturbations mechanical stresses, which manifest output a...

The distributed propulsion aircraft with HTS electrical system is a novel concept for future airliners, which can reduce by more than 70% fuel burn and NO x emissions. circuit breakers ensure the security of this isolating faults timely. Solid-state (SSCBs) are preferred due to their fast respon...

This paper proposes a novel combined device for fault current limiting and dynamic voltage restoring. It consists of a diode bridge superconducting fault current limiter and a dynamic voltage restorer, which both connected together via a common dc link. Interline FCL-DVR system is interlined between two different feeders that connected to a point of common coupling (PCC) in distribution network...

The protection of high voltage direct current (HVDC) grids is a challenge considering that the system must detect, locate, and interrupt large fault currents in few milliseconds. Resistive type superconducting limiters (R-SFCL) can help solve difficult task, reducing extremely demanding ratings HVDC circuit breakers. This paper presents different approaches to model R-SFCLs order analyze their ...