Method for Detecting an Electrical Discharge in an Electrical Apparatus and System Therefor

Patent metadata

Field	Value
Publication number	US-2022018887-A1
Application number	US-202117380313-A
Country	US
Kind code	A1
Filing date	Jul 20, 2021
Priority date	Jul 20, 2020
Publication date	Jan 20, 2022
Grant date	—

Abstract

The present disclosure provides a detection system that includes a first sensing device configured for sensing an acoustic wave and an electromagnetic wave and generating a first combined signal and a signal processing device configured to determine the occurrence and properties of an electrical discharge.

First claim

1 .- 15 . (canceled)

16 . Method for detecting an electrical discharge in an electrical apparatus, the method comprising:
sensing an acoustic wave and an electromagnetic wave using a first sensing device and generating a first combined signal; and processing the first combined signal to determine the occurrence and/or properties of an electrical discharge.

17 . The method for detecting an electrical discharge according to claim 16 , wherein the processing further comprises:
generating a first electromagnetic signal from a component of the first combined signal corresponding to the electromagnetic wave; and generating a first acoustic signal from a component of the first combined signal corresponding to the acoustic wave.

18 . The method for detecting an electrical discharge according to claim 17 , wherein the processing further comprises:
categorizing the electrical discharge based on at least one of the first electromagnetic signal and the first acoustic signal.

19 . The method for detecting an electrical discharge according to claim 17 , wherein the processing further comprises:
determining a first time of flight between a peak amplitude of the first electromagnetic signal and a peak amplitude of the first acoustic signal; and determining the distance of the electrical discharge from the position of the first sensing device based on the first time of flight.

20 . The method for detecting an electrical discharge according to claim 16 , further comprising:
sensing a property of the electrical apparatus using at least a second sensing device, wherein the processing further comprises comparing the first combined signal and a signal from the at least one second sensing device.

21 . The method for detecting an electrical discharge according to claim 16 , further comprising:
sensing the acoustic wave and the electromagnetic wave using at least one second sensing device and generating at least one second combined signal, and wherein the processing further comprises: determining a location of the electrical discharge by comparing the first combined signal and the at least one second combined signal.

22 . The method for detecting an electrical discharge according to claim 21 , wherein the processing further comprises:
generating a first electromagnetic signal from a component of the first combined signal corresponding to the electromagnetic wave; generating a first acoustic signal from a component of the first combined signal corresponding to the acoustic wave; generating at least one second electromagnetic signal from a component of the at least one second combined signal corresponding to the electromagnetic wave; generating at least one second acoustic signal from a component of the at least one second combined signal corresponding to the acoustic wave; determining a first time of flight between a peak amplitude of the first electromagnetic signal and a peak amplitude of the first acoustic signal; determining at least one second time of flight between a peak amplitude of the at least one second electromagnetic signal and a peak amplitude of the at least one second acoustic signal; and determining the location of the electrical discharge based on the position of the first sensing device, the position of the at least one second sensing device, the first time of flight, and the at least one second time of flight.

23 . The method for detecting an electrical discharge according to claim 21 , wherein the first sensing device is configured for sensing the electromagnetic wave and the acoustic wave in one compartment of the electrical apparatus, and the at least one second sensing device is configured for sensing the electromagnetic wave and the acoustic wave in a different compartment of the electrical apparatus.

24 . The method for detecting an electrical discharge according to claim 22 , wherein the first sensing device is configured for sensing the electromagnetic wave and the acoustic wave in one compartment of the electrical apparatus, and the at least one second sensing device is configured for sensing the electromagnetic wave and the acoustic wave in a different compartment of the electrical apparatus.

25 . The method for detecting an electrical discharge according to claim 21 , wherein the first sensing device is configured for sensing the electromagnetic wave and the acoustic wave in one electrical apparatus, and the at least one second sensing device is configured for sensing the electromagnetic wave and the acoustic wave in a different electrical apparatus.

26 . The method for detecting an electrical discharge according to claim 22 , wherein the first sensing device is configured for sensing the electromagnetic wave and the acoustic wave in one electrical apparatus, and the at least one second sensing device is configured for sensing the electromagnetic wave and the acoustic wave in a different electrical apparatus.

27 . The method for detecting an electrical discharge according to claim 20 , wherein the first and at least one second sensing device is a microphone.

28 . The method for detecting an electrical discharge according to claim 27 , wherein the microphone is a micro-electro-mechanical system (MEMS) microphone.

29 . The method for detecting an electrical discharge according to claim 16 , wherein the electrical apparatus is a medium-voltage or high-voltage electrical switchgear.

30 . A detection system for detecting an electrical discharge in an electrical apparatus, the system comprising:
a first sensing device configured for sensing an acoustic wave and an electromagnetic wave and generating a first combined signal; and a signal processing device configured for processing the first combined signal to determine the occurrence and properties of an electrical discharge.

31 . The detection system according to claim 30 , further comprising at least one second sensing device configured for sensing the acoustic wave and the electromagnetic wave and generating a second combined signal, wherein the signal processing device is further configured for comparing the first combined signal and the second combined signal.

32 . The detection system according to claim 30 , wherein the first and at least one second sensing device is a microphone.

33 . The detection system according to claim 32 , wherein the microphone is a micro-electro-mechanical system (MEMS) microphone.

34 . Use of the detection system according to claim 30 for detecting an electrical discharge in an electrical apparatus.

35 . The use of the detection system according to claim 34 , wherein the electrical apparatus is a medium-voltage or high-voltage electrical switchgear.

Assignees

• Abb Schweiz Ag

Inventors

• Hencken Kai
• Kaul Holger
• Gebhardt Jörg
• Maret Yannick
• Krivda Andrej

Classifications

• G06F18/24

  Classification techniques · CPC title

• G01R1/18

  Screening arrangements against electric or magnetic fields, e.g. against earth's field · CPC title

• G01R31/1209 Primary

  using acoustic measurements (acoustic measurements G01H3/00) · CPC title

• G01R31/16

  Construction of testing vessels; Electrodes therefor · CPC title

• G01R31/1218

  using optical methods; using charged particle, e.g. electron, beams or X-rays · CPC title