Current differential protective apparatus and method for protecting bus-line in substation system

摘要

Disclosed is a current differential type bus line protection technique in a substation system that enables a more accurate fault judgment by correcting sampling rates and phase differences that are differently implemented in each of a plurality of merging units. To this end, the current differential type busbar protection device in the substation system according to the present invention includes a determination unit, a timing signal generation unit, a valid set generation unit, a protection set generation unit, a phase angle correction unit, and a protection operation execution unit .