tailieunhanh - Báo cáo hóa học: " Research Article Accurate Methods for Signal Processing of Distorted Waveforms in Power Systems"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Accurate Methods for Signal Processing of Distorted Waveforms in Power Systems | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2007 Article ID92191 14 pages doi 2007 92191 Research Article Accurate Methods for Signal Processing of Distorted Waveforms in Power Systems A. Bracale 1 G. Carpinelli 1 R. Langella 2 and A. Testa2 1 Dipartimento di Ingegneria Elettrica Universita degli Studi di Napoli Federico II Via Claudio 21 80100 Napoli NA Italy 2 Dipartimento di Ingegneria dell Informazione Seconda Universita degli Studi di Napoli Via Roma 29 81031 Aversa CE Italy Received 3 August 2006 Revised 23 December 2006 Accepted 23 December 2006 Recommended by Alexander Mamishev A primary problem in waveform distortion assessment in power systems is to examine ways to reduce the effects of spectral leakage. In the framework of DFT approaches line frequency synchronization techniques or algorithms to compensate for desynchronization are necessary alternative approaches such as those based on the Prony and ESPRIT methods are not sensitive to desynchronization but they often require significant computational burden. In this paper the signal processing aspects of the problem are considered different proposals by the same authors regarding DFT- Prony- and ESPRIT-based advanced methods are reviewed and compared in terms of their accuracy and computational efforts. The results of several numerical experiments are reported and analysed some of them are in accordance with IEC Standards while others use more open scenarios. Copyright 2007 A. Bracale et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. INTRODUCTION The power quality PQ in power systems has recently become an important concern for utility facility and consulting engineers since electric disturbances can have significant economic consequences. Several studies have characterized such PQ .