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Title: Method for enabling monitoring of power consumption

Abstract

Power consumption at a site is monitored. An electrical load is connected to a power source by an electrical conductor. A fuel-less energy producing device is electrically connected to a junction along the electrical conductor. A current sensor is electromagnetically coupled to the electrical conductor at a sensing position between the power source and the junction to create a current sensor signal. Sensed current and voltage signals are produced from the current sensor signal. A sensed phase relationship between the sensed signals is determined and compared to a baseline phase relationship to determine the direction of current flow through the conductor. A power source signal, based on the current flowing through the conductor at the sensing position, is created. With some examples a Rogowski type differential current sensor is used. In some examples a single current sensor is used.

Inventors:
;
Issue Date:
Research Org.:
SunPower Corporation, San Jose, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1531614
Patent Number(s):
7,622,912
Application Number:
12/136,698
Assignee:
SunPower Corporation (San Jose, CA)
DOE Contract Number:  
FC36-07GO17043
Resource Type:
Patent
Resource Relation:
Patent File Date: 2008-06-10
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 14 SOLAR ENERGY

Citation Formats

Adams, Frank J., and Klein, David L. Method for enabling monitoring of power consumption. United States: N. p., 2009. Web.
Adams, Frank J., & Klein, David L. Method for enabling monitoring of power consumption. United States.
Adams, Frank J., and Klein, David L. Tue . "Method for enabling monitoring of power consumption". United States. https://www.osti.gov/servlets/purl/1531614.
@article{osti_1531614,
title = {Method for enabling monitoring of power consumption},
author = {Adams, Frank J. and Klein, David L.},
abstractNote = {Power consumption at a site is monitored. An electrical load is connected to a power source by an electrical conductor. A fuel-less energy producing device is electrically connected to a junction along the electrical conductor. A current sensor is electromagnetically coupled to the electrical conductor at a sensing position between the power source and the junction to create a current sensor signal. Sensed current and voltage signals are produced from the current sensor signal. A sensed phase relationship between the sensed signals is determined and compared to a baseline phase relationship to determine the direction of current flow through the conductor. A power source signal, based on the current flowing through the conductor at the sensing position, is created. With some examples a Rogowski type differential current sensor is used. In some examples a single current sensor is used.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2009},
month = {11}
}

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Works referenced in this record:

Transient direction detector
patent, October 1976


Apparatus for detecting direction of electric power flow
patent, November 1988


Backup protection switch to prevent reverse power flow in a UPS
patent, August 1988


Power flow direction detector
patent, December 1984


Apparatus for measuring voltages and currents using non-contacting sensors
patent, December 1995


Power transmission line monitoring system
patent, January 1993


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