Method and apparatus for monitoring power quality in an electric power distribution system
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United States of America Patent
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May 23, 2006
Grant Date -
Aug 25, 2005
app pub date -
Feb 19, 2004
filing date -
Feb 19, 2004
priority date (Note) -
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Abstract
A composite power quality indication generated from user weighted statistical contributions of selected system parameters provides an overall indication of power quality in an electric power distribution system. The user defined weightings are maintained over time by continually updating sensitivities that normalize the component contributions to the composite power quality indication. The current composite power quality indication is displayed in relation to its long-term mean and to dynamic thresholds determined as multiples of the standard deviation of the long-term mean.
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