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公开(公告)号：US20180011128A1
公开(公告)日：2018-01-11
申请号：US15710243
申请日：2017-09-20
Applicant: ABB Schweiz AG
Inventor： Joris Pascal , Richard Bloch
CPC classification number: G01R15/04 , G01R35/005
Abstract: The present application relates to a method for providing a corrected measuring signal indicating a high voltage on a high-voltage node (HV), including: injecting a periodic injection signal into a voltage divider coupled between the high-voltage node (HV) and a reference potential; obtaining a sensing signal at a sensing node (S) of the voltage divider, wherein the sensing signal depends on the periodic injection signal; from the sensing signal, separating a first sensing signal portion resulting from the high voltage and a second sensing signal portion resulting from the periodic injection signal; and depending on the second sensing signal portion, correcting the first sensing signal portion corresponding to the high-voltage signal in order to obtain the corrected measuring signal.
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公开(公告)号：US09791478B2
公开(公告)日：2017-10-17
申请号：US14512765
申请日：2014-10-13
Applicant: ABB Schweiz AG
Inventor： Joris Pascal , Yannick Maret , Jean-Baptiste Kammerer , Rolf Disselnkotter
CPC classification number: G01R15/181 , G01R19/0092 , G01R35/005
Abstract: The invention is about a current transducer of the Rogowski type, with a primary conductor winding having a first number of loops (N1) for carrying the rated current (IR) to be measured, with a secondary conductor winding having a pair of second terminals and a helical shape and a second number of loops (N2), said secondary conductor winding encircling the primary conductor in a toroidal manner, whereby a rated current voltage signal VS is induced between the pair of second terminals of the secondary winding, said rated current voltage signal being characteristic for the derivative of the rated current (dIR/dt), with a transducer electronics (IED) configured to receive the rated current voltage signal (VS), characterized in that the current transducer comprises a third conductor winding having a pair of third terminals with a third number of loops (N3), whereby the transducer electronics (IED) is configured to feed a calibration current signal (ICal) into the third conductor winding, whereby in response to the derivative of the calibration current signal (dl-Cal/dt) an additional calibration signal (Vcal) is created between the pair of second terminals of the second winding and whereby the transducer electronics (IED) is configured to process the rated current voltage signal (VS) and the calibration signal (Vcal) to derive a corrected voltage signal (VS,corrected) with a calibrated sensitivity Scal.
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公开(公告)号：US10901004B2
公开(公告)日：2021-01-26
申请号：US15710243
申请日：2017-09-20
Applicant: ABB Schweiz AG
Inventor： Joris Pascal , Richard Bloch
Abstract: The present application relates to a method for providing a corrected measuring signal indicating a high voltage on a high-voltage node (HV), including: injecting a periodic injection signal into a voltage divider coupled between the high-voltage node (HV) and a reference potential; obtaining a sensing signal at a sensing node (S) of the voltage divider, wherein the sensing signal depends on the periodic injection signal; from the sensing signal, separating a first sensing signal portion resulting from the high voltage and a second sensing signal portion resulting from the periodic injection signal; and depending on the second sensing signal portion, correcting the first sensing signal portion corresponding to the high-voltage signal in order to obtain the corrected measuring signal.
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