CB stress reduction and comparison of energy dissipation for two types of FCLs

Abstract

Fault current limiters (FCLs) are expected to play an important role in the protection of the future power networks, since the expanding of the power networks leads to much higher short-circuit power. This paper presents an analysis of the influence of different types of FCLs on the short-circuit energy dissipation and signal waveforms of the power line upon the fault occurrence. Dissipated energy upon the fault inception is determined for the resistive FCL considering two types: solid-state FCL and hybrid FCL. The reduction in the amount of energy imposed on a CB by employing a resistive or an inductive FCL is analyzed. The results of the analysis of the power system behavior upon the fault occurrence, from the aspect of energy dissipation in different components, are presented. Also, the dependency of the line current waveform on the moment of the fault inception and the FCL reaction time is shown.