The presence of the new liberalized markets has increased the interest in power-quality (PQ) disturbances due to their economic effect. In particular, in the case of disturbances caused by a single event (such as a capacitor switching or voltage sag), the waveform assessment can be difficult due to the rapid variations in waveform spectral component characteristics; these difficulties require a suitable choice of signal-processing techniques for spectral analysis and, in particular, the resort to time-frequency representations. In this paper, the adaptive Prony method is proposed to calculate PQ indices based on a time-frequency analysis of waveforms. Numerical applications on a simulated transient due to capacitor switching, a measured voltage sag, and a test waveform are also presented and discussed in order to investigate the validity of the proposed method.

Adaptive Prony Method for the Calculation of Power-Quality Indices in the Presence of of Nonstationary Disturbance Waveforms / Andreotti, Amedeo; Bracale, A.; Caramia, P.; Carpinelli, Guido. - In: IEEE TRANSACTIONS ON POWER DELIVERY. - ISSN 0885-8977. - STAMPA. - 24(2):(2009), pp. 874-883. [10.1109/TPWRD.2008.923992]

Adaptive Prony Method for the Calculation of Power-Quality Indices in the Presence of of Nonstationary Disturbance Waveforms

ANDREOTTI, AMEDEO;CARPINELLI, GUIDO
2009

Abstract

The presence of the new liberalized markets has increased the interest in power-quality (PQ) disturbances due to their economic effect. In particular, in the case of disturbances caused by a single event (such as a capacitor switching or voltage sag), the waveform assessment can be difficult due to the rapid variations in waveform spectral component characteristics; these difficulties require a suitable choice of signal-processing techniques for spectral analysis and, in particular, the resort to time-frequency representations. In this paper, the adaptive Prony method is proposed to calculate PQ indices based on a time-frequency analysis of waveforms. Numerical applications on a simulated transient due to capacitor switching, a measured voltage sag, and a test waveform are also presented and discussed in order to investigate the validity of the proposed method.
2009
Adaptive Prony Method for the Calculation of Power-Quality Indices in the Presence of of Nonstationary Disturbance Waveforms / Andreotti, Amedeo; Bracale, A.; Caramia, P.; Carpinelli, Guido. - In: IEEE TRANSACTIONS ON POWER DELIVERY. - ISSN 0885-8977. - STAMPA. - 24(2):(2009), pp. 874-883. [10.1109/TPWRD.2008.923992]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/349368
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