Self-learning reverse power flow detection

Details Self-learning reverse power flow detection Self-learning reverse power flow detection

2011-07-26

2011-07-26

Bui, Bryan (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Electrical signal parameter measurement system

C363S065000, C323S284000

Reexamination Certificate

active

07987058

ABSTRACT:
A monitoring device to detect an indication of reverse power flow across a monitored transformer. The monitoring device adapted to handle a series of phase angle differences between a monitored current and a monitored voltage and establish a baseline phase angle difference after the network protector closes to connect the monitored transformer to a distribution network. The monitoring device working to establish a baseline phase angle even when a measured value for the magnitude of the monitored current has a reversed polarity from an actual current flowing from the monitored transformer or when the monitored current and the monitored voltage are not taken from the same phase from the monitored transformer. The monitoring device adapted to detect a significant change in phase angle difference from the baseline phase angle difference as an indication of reverse power flow. This abstract is intended as a tool to help others locate a relevant disclosure and not as a guide to the scope of the claims.

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patent: 2006/0285366 (2006-12-01), Radecker et al.
patent: 2007/0215613 (2007-09-01), Kinzer

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