Voltage index for stationary and transient states

The Fourier Transform analysis is able to estimate the amplitude and frequency of signals under stationary conditions. For transient or aperiodic signals the Fourier analysis is unable to obtain accurate results and a joint time-frequency analysis must be used to provide simultaneous time and freque...

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Bibliographic Details
Main Authors: Borrás, Maria-Dolores, Montaño, Juan-Carlos, Castilla, Manuel, López, Antonio, Gutiérrez, Jaime, Bravo, Juan-Carlos
Format: Conference Proceeding
Language:English
Subjects:
Amplitude estimation
Fourier transforms
Frequency estimation
Information analysis
Power quality
Signal analysis
Time frequency analysis
Total harmonic distortion
Transient analysis
Voltage
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Summary:The Fourier Transform analysis is able to estimate the amplitude and frequency of signals under stationary conditions. For transient or aperiodic signals the Fourier analysis is unable to obtain accurate results and a joint time-frequency analysis must be used to provide simultaneous time and frequency information of transient intervals. A voltage quality index is proposed for evaluation of both the stationary and transient quality aspects of electrical signals. The widely used total harmonic distortion index (THD) is redefined in this paper to include harmonics, oscillatory transients, voltage sags and swells. The new index is defined between the 0-1 range.
ISSN:2158-8473
2158-8481
DOI:10.1109/MELCON.2010.5475997