Abstract
High impedance fault (HIF) detection is a challenging task due to the low arc current magnitude which may not be detected by traditional protection relays. HIFs may cause fire, human injuries or even fatalities if they are not detected at an early stage. Therefore, detection of HIFs is necessary for enhancing the reliably and safety of the distribution networks. This paper investigates the performance of the embedded HIF modules in two commercialized HIF detection relays for an actual distribution network. The network and an actual HIF model are implemented in RSCAD software and tested in a hardware-in-the-loop platform using a combination of a real-time digital simulator (RTDS) and the relays. Extensive tests have been conducted to assess the relays performance for HIFs with different ground surface materials and different positions along the lines.
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