Current measurement methods and apparatus employing second...

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

G - Physics

01

R

G01R 21/06 (2006.01)

Patent

CA 2265863

A method for measuring an AC current in a conductor (10) in which a DC current also exists including the step of obtaining a first AC current measurement, obtaining a measure of a power factor, fundamental frequency component and second harmonic component (S2) and adjusting the first AC current measurement in accordance with an error value to obtain a corrected current measurement (S3, S4). The error value is determined as a function of the power factor, fundamental frequency component and second harmonic component.

Procédé pour mesurer un courant alternatif (CA) dans un conducteur (10) dans lequel il existe également un courant continu (CC), consistant à obtenir une première mesure du CA (S1), obtenir une mesure d'un facteur de puissance, d'une composante de fréquence fondamentale et d'une deuxième composante harmonique (S2), à adapter la première mesure de CA en fonction d'une valeur d'erreur pour obtenir une mesure de courant rectifiée (S3, S4). La valeur d'erreur est calculée en tant que fonction du facteur de puissance, de la composante de fréquence fondamentale et de la deuxième composante harmonique.

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