High-impedance fault detection and localization in distribution feeders with microprocessor based devices

Abstract

An accurate electrical model for a HIF is implemented to investigate typical patterns in the line's current that allow for the detection of these faults. Based on the implemented model an algorithm is proposed to detect and localize the occurrence of HIFs using present recloser/sectionalizer technology. The detection algorithm is presented showing the decision criteria for HIF declaration and its discrimination against nominal behavior in distribution feeders of similar harmonic content.