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    • 7. 发明申请
    • Harmonics Measurement in Power Grids
    • US20210011061A1
    • 2021-01-14
    • US16981326
    • 2019-02-19
    • innogy SE
    • Jörn Runge
    • G01R19/25H02J3/24H02J3/38
    • The subject-matter relates to a method, performed by at least one apparatus, including: determining of a correction factor for at least one first voltage transformer arranged in a power grid, the correction factor being indicative of a correction for obtaining correct measured values measured by the at least one first voltage transformer, wherein the determining of the correction factor of the at least one first voltage transformer being performed at least partially based on a first measured voltage of the at least one first voltage transformer and a second measured voltage of the at least one first voltage transformer, wherein the second voltage of the at least one first voltage transformer is determined at least partially based on a known transfer function of at least one second voltage transformer and the first voltage of the at least one first voltage transformer is determined without taking into account the known transfer function of the at least one second voltage transformer; determining a calibration factor for the at least one first voltage transformer based at least in part on the determined correction factor; and outputting or causing the output of the determined calibration factor. The subject matter further relates to a correspondingly configured apparatus and a system.