US 11,788,879 B2
State analysis of an inductive operating resource
Karsten Viereck, Regensburg (DE); and Anatoli Saveliev, Zeitlarn (DE)
Assigned to MASCHINENFABRIK REINHAUSEN GMBH, Regensburg (DE)
Appl. No. 17/53,099
Filed by Maschinenfabrik Reinhausen GmbH, Regensburg (DE)
PCT Filed May 15, 2019, PCT No. PCT/EP2019/062514
§ 371(c)(1), (2) Date Jun. 8, 2021,
PCT Pub. No. WO2019/219761, PCT Pub. Date Nov. 21, 2019.
Claims priority of application No. 10 2018 112 003.6 (DE), filed on May 18, 2018.
Prior Publication US 2021/0293899 A1, Sep. 23, 2021
Int. Cl. G01H 3/00 (2006.01); G01R 31/62 (2020.01); G01R 31/72 (2020.01); G01P 15/00 (2006.01)
CPC G01H 3/00 (2013.01) [G01P 15/00 (2013.01); G01R 31/62 (2020.01); G01R 31/72 (2020.01)] 14 Claims
OG exemplary drawing
 
1. A system for analysis of a state of an inductive operator, which is a transformer or a choke, the system comprising:
a measuring device configured to:
detect an acoustic reference signal and a plurality of time-variable operating variables, including a tap changer position, of the inductive operator or a reference inductive operator during a reference time period; and
detect an acoustic signal and the time-variable operating variables, including the tap changer position, during a productive time period; and
an evaluating device configured to:
generate a reference data set from the reference signal and a productive data set from the acoustic signal;
perform a regression analysis of the reference data set and thereby create a model for description of the acoustic reference signal by the time-variable operating variables, including the tap changer position; and
generate a state evaluation of the inductive operator from a difference between the productive data set and values modelled in accordance with the model,
wherein the inductive operator of the reference inductive operator comprises winding taps and a tap changer configured to switch over between the winding taps, and
wherein the tap changer position indicates which of the winding taps is currently selected by the tap changer.