US 12,308,639 B2
Method for identifying asymmetrical vibrations when operating an electrical device connected to a high-voltage grid
Holger Herterich, Nuremberg (DE); Franz Klammler, Passail (AT); Ruediger Kutzner, Zirndorf (DE); Harald Mayer, Roethenbach an der Pegnitz (DE); and Marc Weber, Nuremberg (DE)
Assigned to Siemens Energy Global GmbH & Co. KG, Munich (DE)
Appl. No. 17/629,935
Filed by Siemens Energy Global GmbH & Co. KG, Munich (DE)
PCT Filed Jul. 9, 2020, PCT No. PCT/EP2020/069428
§ 371(c)(1), (2) Date Jan. 25, 2022,
PCT Pub. No. WO2021/013573, PCT Pub. Date Jan. 28, 2021.
Claims priority of application No. 10 2019 211 040.1 (DE), filed on Jul. 25, 2019.
Prior Publication US 2022/0294262 A1, Sep. 15, 2022
Int. Cl. H02J 13/00 (2006.01); G01R 23/16 (2006.01); G01R 31/62 (2020.01); G01D 21/02 (2006.01); H02J 3/00 (2006.01)
CPC H02J 13/00002 (2020.01) [G01R 23/16 (2013.01); G01R 31/62 (2020.01); H02J 13/00032 (2020.01); H02J 2203/10 (2020.01)] 9 Claims
OG exemplary drawing
 
1. A method of identifying asymmetrical vibrations during an operation of an electrical device which is connected to a high-voltage grid, the method comprising:
acquiring operational noise of the electrical device using acoustic sensors which provide measurement values on an output side;
transmitting the measurement values and/or values derived from the measurement values to a communication unit via a short-range communication connection;
transmitting the measurement values and/or the values derived from the measurement values from the communication unit to a data processing cloud via a long-range communication connection;
breaking down the measurement values and/or the values derived from the measurement values into their frequency components in the data processing cloud by way of a Fourier transformation so as to obtain a frequency spectrum;
ascertaining odd and even frequency components of the frequency spectrum based on a fundamental frequency of the high-voltage grid and determining a ratio R between the odd and even frequency components; and
if the ratio R exceeds a predetermined threshold value concluding a presence of asymmetrical vibrations of the electrical device.