CPC G01H 3/00 (2013.01) [G01P 15/00 (2013.01); G01R 31/62 (2020.01); G01R 31/72 (2020.01)] | 14 Claims |
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.
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