Current measurement methods and apparatus employing second harmo

Details Current measurement methods and apparatus employing second harmo Current measurement methods and apparatus employing second harmo

1997-08-07

1999-05-25

Nguyen, Vinh P.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Plural inputs

G01R 700

Patent

active

059072415

ABSTRACT:
A method for measuring an AC current in a conductor in which a DC current also exists includes the steps of (A) obtaining a first AC current measurement; (B) obtaining a measure of a power factor, fundamental frequency component, and second harmonic component; and (C) adjusting the first AC current measurement in accordance with an error value to obtain a corrected current measurement. The error value is determined as a function of the power factor, fundamental frequency component, and second harmonic component.

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