Patent ID: 9594112
Date: 2017-03-14
CPC Classifications: G01R,G05B,H02H

Claim:
1. A system configured to detect a fault in an electric power delivery system, comprising: a data acquisition subsystem configured to receive a plurality of representations of electrical conditions associated with at least a portion of the electric power delivery system; an incremental quantities subsystem configured to calculate an incremental current quantity and an incremental voltage quantity based on the plurality of representations of electrical conditions associated with the at least a portion of the electric power delivery system; a fault detection subsystem configured to: a protective action subsystem configured to implement a protective action based on the declaration of the fault; a directional subsystem configured to determine a direction to the fault; wherein the direction subsystem is configured to determine the direction to the fault based on a resistive behavior of the electric power delivery system during a window of time following the fault and to determine the direction to the fault based on a resistive-inductive behavior of the electric power delivery system after the window of time following the fault.