Abstract
This paper describe the use of a fast solid-state fault current limiting and interrupting device, which Is developed by the authors, to enhance the quality of supply in distribution networks by minimizing the disturbance to loads during the occurrence of a fault Performance analysis of the proposed device shows that It also has the capability to improve the imbalance between phases during a single-phase fault. This has significant effect on the performance of harmonic sensitive loads such as power electronic converters connected to the system. The relevant modeling, digital simulation and test results, referring to a realistic three-phase system are reported and discussed.