A new joint sliding-window ESPRIT and DFT scheme for waveform distortion assessment in power systems
Artikel i vetenskaplig tidskrift, 2012

This paper proposes a novel scheme that jointly employs a sliding-window ESPRIT and DFT for estimating harmonic and interharmonic components in power system disturbance data. In the proposed scheme, separate stages are utilized to estimate the voltage fundamental component, harmonics and interharmonics. This includes the estimation of the fundamental component from lowpass filtered data using a sliding-window ESPRIT, of harmonics from a sliding-window DFT with a synchronized window, and of interharmonics from the residuals by applying the sliding-window ESPRIT. Main advantages of the approach include high resolution and accuracy in parameter estimation and significantly reduced computational cost. Experiments and comparisons are made on both synthetic and measurement data. Results have shown the effectiveness and efficiency of the proposed scheme.



power system disturbances

sliding-window ESPRIT

Power system measurements

waveform distortion assessment

sliding-window DFT


A. Bracale

Universita degli Studi di Napoli Parthenope

G. Carpinelli

Universita degli Studi di Napoli Federico II

Irene Yu-Hua Gu

Chalmers, Signaler och system, Signalbehandling och medicinsk teknik, Signalbehandling

Mathias Bollen

Luleå tekniska universitet


Electric Power Systems Research

0378-7796 (ISSN)

Vol. 88 112-120


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