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Published Article / ENY-ARTICLE-2008-032

Analysis of Three Phase Signal using Wigner Spectrum

Leonowicz, Z ; Lobos, T


Abstract: New method of observation and diagnosis of inverter-fed induction motor drives is developed and tested. Unsymmetrical conditions concerning the machine impedances or valves operation are reflected in the spectrum of the current spacephasor. We estimate the spectrum of the space-phasor with the help of the Wigner- Ville distribution (WVD) and we obtain its time-frequency representation with excellent time and frequency resolution. The proposed method is tested with nonstationary multiple-component signals occurring during the fault operation of inverter-fed drives and transmission lines.

Keyword(s): spectral estimation ; Wigner-Ville distribution ; space-phasor
Note: XVI IMEKO World Congress, Hofburg, Vienna, 25-28 Sepetmber, 2000

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Record created 2008-03-09, last modified 2008-03-09

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