Application of the Acoustic Emission Method for Diagnosis of On-Load Tap Changer
| Autor: | Henryk Majchrzak, Sebastian Borucki, Andrzej Cichon |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Acoustics and Ultrasonics Computer science 020209 energy Acoustics 02 engineering and technology 01 natural sciences Tap changer Domain (software engineering) symbols.namesake Fourier transform Acoustic emission 0103 physical sciences Partial discharge 0202 electrical engineering electronic engineering information engineering symbols Spectrogram Waveform Time domain |
| Zdroj: | Archives of Acoustics. 42:29-35 |
| ISSN: | 2300-262X |
| DOI: | 10.1515/aoa-2017-0004 |
| Popis: | This paper provides an example of the application of the acoustic emission (AE) method for the diagnosis of technical conditions of a three-phase on-load tap-changer (OLTC) GIII type. The measurements were performed for an amount of 10 items of OLTCs, installed in power transformers with a capacity of 250 MVA. The study was conducted in two different OLTC operating conditions during the tapping process: under load and free running conditions. The analysis of the measurement results was made in both time domain and time-frequency domain. The description of the AE signals generated by the OLTC in the time domain was performed using the analysis of waveforms and determined characteristic times. Within the time-frequency domain the measured signals were described by short-time Fourier transform spectrograms. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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