Obtaining the electrical impedance phase using Wavelet transform and Fourier transform from transient signals. Part 2: practical assessment and validation
This article presents a practical assessment and validation of the new proposed approach based on the continuous wavelet transform (CWT) to obtain the electrical impedance phase from online transient signals for a real transformer. Besides the mathematical procedure presented in a previous paper, an...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Universidad Nacional de Colombia
2018-04-01
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| Series: | Dyna |
| Subjects: | |
| Online Access: | https://revistas.unal.edu.co/index.php/dyna/article/view/68458 |
| Summary: | This article presents a practical assessment and validation of the new proposed approach based on the continuous wavelet transform (CWT) to obtain the electrical impedance phase from online transient signals for a real transformer. Besides the mathematical procedure presented in a previous paper, an electronic system was also designed and implemented, in order to inject superimposed controlled pulses to the power system (50/60 Hz) wave. The results show improved performance of the wavelet transform compared to that of the Fourier Transform, for transient signal analysis to be applied on a nonintrusive transformer monitoring approach. Particularly, this new approach proves useful in overcoming problems related to signal filtering and signal processing in an online frequency-response analysis of a transformer diagnosis. |
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| ISSN: | 0012-7353 2346-2183 |