发明名称 CURRENT MEASUREMENT METHODS AND APPARATUS EMPLOYING SECOND HARMONIC SCALING
摘要 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.
申请公布号 WO9811447(A1) 申请公布日期 1998.03.19
申请号 WO1997US15081 申请日期 1997.08.27
申请人 ABB POWER T & D COMPANY INC. 发明人 SHUEY, KENNETH, C.;HEMMINGER, RODNEY, C.
分类号 G01R19/25;G01R21/133;(IPC1-7):G01R21/06;G01F15/20 主分类号 G01R19/25
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