US 2024/0103098 A1 · METHOD AND DEVICE FOR ANALYSING THE STATE, CONDITION AND POWER QUALITY OF TRANSFORMERS IN POWER GRIDS

Abstract

Methods, apparatuses, and systems for analysing the state of power transformers are described. A method may include providing at least one sensor arranged relative to a power transformer, retrieving at least one vibroacoustic signal from said at least one sensor, performing a time-frequency decomposition of said at least one vibroacoustic signal from a time domain to a frequency domain, identifying one or more vibroacoustic harmonic frequencies provided by the fast Fourier transformation of the at least one vibroacoustic signal, calculating an amplitude value and a phase angle related to the one or more harmonic frequencies, retrieving an electromagnetic signal emitted from the power transformer, a temperature generated by the power transformer, or both, and providing at least one analysed information from the amplitude value and the phase angle related to the one or more harmonic frequencies, the electromagnetic signal, the temperature, or any combination thereof.

Claims20

Dependent claims

A method for analysing a state of power transformers in power grids, comprising:

providing at least one sensor arranged relative to a power transformer,
retrieving at least one vibroacoustic signal from said at least one sensor,
performing a time-frequency decomposition of said at least one vibroacoustic signal from a time domain to a frequency domain using fast Fourier transformation,
identifying one or more vibroacoustic harmonic frequencies provided by the fast Fourier transformation of said at least one vibroacoustic signal,
calculating an amplitude value and a phase angle related to said one or more vibroacoustic harmonic frequencies,
retrieving an electromagnetic signal emitted from said power transformer using at least one EMF sensor, and retrieving a temperature generated by the power transformer using at least one temperature sensor measuring, and
providing at least one analysed information from said amplitude value and said phase angle related to said one or more vibroacoustic harmonic frequencies and said electromagnetic signal, and said temperature, where the at least one analysed information is related to the state of the power transformer.

4 more elements

A computer-readable storage medium comprising instructions that are executable by a processor of a device to cause the device to:

retrieve at least one vibroacoustic signal from at least one sensor arranged relative to a power transformer,
perform a time-frequency decomposition of said at least one vibroacoustic signal from a time domain to a frequency domain using fast Fourier transformation,
identify one or more vibroacoustic harmonic frequencies provided by the fast Fourier transformation of said at least one vibroacoustic signal,
calculate an amplitude value and a phase angle related to said one or more vibroacoustic harmonic frequencies,
retrieve an electromagnetic signal emitted from said power transformer using at least one EMF sensor, and retrieve a temperature generated by the power transformer using at least one temperature sensor measuring, and
provide at least one analysed information from said amplitude value and said phase angle related to said one or more vibroacoustic harmonic frequencies, and said electromagnetic signal, and said temperature, where the at least one analysed information is related to a state of the power transformer.

3 more elements

Dependencies are inferred from the claim text.

Method and device for analysing the state, condition and power quality of transformers in power grids

Life of this patent

Method and device for analysing the state, condition and power quality of transformers in power grids

Life of this patent

Abstract

Claims20