Method of determining fault of power system

Abstract

Embodiments of present disclosure provides methods for determining a fault of a power system. Methods include estimating, based on measured electrical quantities at a first position of a power line in the power system, voltages at a second position of the power line, the measured electrical quantities being associated with three phases of the power system and comprising voltages at the first position of the power line. The methods include determining at least one phase angle between the voltages at the first position and the estimated voltages at the second position, and detecting the fault based on the at least one phase angle during a power swing. In a method according to the present disclosure, a three-phase fault during a power swing is identified in a shorter time, and thus the tripping is performed with a faster speed.

Dependencies are inferred from the claim text.