A new joint sliding-window ESPRIT and DFT scheme for waveform distortion assessment in power systems

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• 作者：Antonio Bracale^a ; ^{antonio.bracale@uniparthenope.it} ; ^{antonio.bracale@unina.it} ; Guido Carpinelli^b ; Irene Yu-Hua Gu^c ; Math H.J. Bollen^d ; ^e
• 关键词：Power system measurements ; Power system disturbances ; Waveform distortion assessment ; Sliding-window ESPRIT ; Sliding-window DFT ; Harmonics ; Interharmonics
• 刊名：Electric Power Systems Research
• 出版年：2012
• 期刊代码：49_03787796
• 类别：et
• 出版时间：July, 2012
• 卷：88
• 期：Complete
• 页码：112-120
• 文件大小：503 K

摘要

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.