Time-frequency analysis of DC bias vibration of transformer core on the basis of Hilbert–Huang transform
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| Format: | Artículo científico |
| Langue: | en |
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Universidad Nacional de Colombia
2016
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| _version_ | 1876487460412719104 |
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| author | X.M. Liu |
| author_facet | X.M. Liu |
| contents | Time-frequency analysis of DC bias vibration of transformer core on the basis of Hilbert–Huang transform X.M. Liu Y.M. Yang F. Yang Q.Y. Shi Ingeniería HHT DC bias vibration transformer This paper presents a time–frequency analysis of the vibration of transformer under direct current (DC) bias through Hilbert–Huang transform (HHT). First, the theory of DC bias for the transformer was analyzed. Next, the empirical mode decomposition (EMD) process, which is the key in HHT, was introduced. The results of EMD, namely, intrinsic mode functions (IMFs), were calculated and summed by Hilbert transform(HT) to obtain time-dependent series in a 2D time–frequency domain. Lastly, a test system of vibration measurement for the transformer was set up. Three direction (x, y, and z axes) components of core vibration were measured. Decomposition of EMD and HHT spectra showed that vibration strength increased, and odd harmonics were produced with DC bias. Results indicated that HHT is a viable signal processing tool for transformer health monitoring. 2016 artículo científico 0120-5609 https://www.redalyc.org/articulo.oa?id=64345266012 en http://www.redalyc.org/revista.oa?id=643 Ingeniería e Investigación application/pdf Universidad Nacional de Colombia Ingeniería e Investigación (Colombia) Num.1 Vol.36 |
| format | Artículo científico |
| id | redalyc_64345266012 |
| institution | Redalyc |
| language | en |
| publishDate | 2016 |
| publisher | Universidad Nacional de Colombia |
| spellingShingle | Time-frequency analysis of DC bias vibration of transformer core on the basis of Hilbert–Huang transform X.M. Liu Ingeniería HHT DC bias vibration transformer Time-frequency analysis of DC bias vibration of transformer core on the basis of Hilbert–Huang transform X.M. Liu Y.M. Yang F. Yang Q.Y. Shi Ingeniería HHT DC bias vibration transformer This paper presents a time–frequency analysis of the vibration of transformer under direct current (DC) bias through Hilbert–Huang transform (HHT). First, the theory of DC bias for the transformer was analyzed. Next, the empirical mode decomposition (EMD) process, which is the key in HHT, was introduced. The results of EMD, namely, intrinsic mode functions (IMFs), were calculated and summed by Hilbert transform(HT) to obtain time-dependent series in a 2D time–frequency domain. Lastly, a test system of vibration measurement for the transformer was set up. Three direction (x, y, and z axes) components of core vibration were measured. Decomposition of EMD and HHT spectra showed that vibration strength increased, and odd harmonics were produced with DC bias. Results indicated that HHT is a viable signal processing tool for transformer health monitoring. 2016 artículo científico 0120-5609 https://www.redalyc.org/articulo.oa?id=64345266012 en http://www.redalyc.org/revista.oa?id=643 Ingeniería e Investigación application/pdf Universidad Nacional de Colombia Ingeniería e Investigación (Colombia) Num.1 Vol.36 |
| title | Time-frequency analysis of DC bias vibration of transformer core on the basis of Hilbert–Huang transform |
| topic | Ingeniería HHT DC bias vibration transformer |
| url | https://www.redalyc.org/articulo.oa?id=64345266012 |