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1. (WO2014204637) SOURCE IMPEDANCE ESTIMATION

Pub. No.:    WO/2014/204637    International Application No.:    PCT/US2014/040322
Publication Date: Thu Dec 25 00:59:59 CET 2014 International Filing Date: Sat May 31 01:59:59 CEST 2014
IPC: G05F 1/70
Applicants: SCHWEITZER ENGINEERING LABORATORIES, INC
Inventors: ALLEN, William F.
HAES, Dennis
Title: SOURCE IMPEDANCE ESTIMATION
Abstract:
Disclosed herein are a variety of systems and methods for estimating a source impedance value. One embodiment may include an intelligent electronic device (IED) configured to interface with an electric power distribution system. The IED may include a communications interface, a processor, and a non-transitory computer-readable storage medium. The computer-readable storage medium may include software instructions executable on the processor that enable the IED to identify a source impedance modeling event at a node in the power distribution system. The software instructions may further enable the IED to receive a plurality of measurements representing an electrical condition at the node prior to the source impedance modeling event and subsequent to the source impedance modeling event. The IED may calculate a source impedance value based on the first plurality of measurements at the node. Based on the source impedance value, a control action may be generated.