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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

An improved method for signal processing and compression in power quality evaluation

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Author(s):
Romano, João Marcos Travassos ; Duque, Carlos A. ; Ribeiro, Moises Vidal [3]
Total Authors: 3
Document type: Journal article
Source: IEEE Transactions on Power Delivery; v. 19, n. 2, p. 464-471, Apr. 2004.
Field of knowledge: Engineering - Electrical Engineering
Abstract

This paper introduces a new waveform coding technique, based on wavelet transform, for power quality monitoring purposes. The proposed enhanced data compression method (EDCM) presents a complete adaptive signal processing approach to estimate the fundamental sinusoidal component and separate it from the transient ones in the monitored signal. When these nonstationary components are submitted to the compression technique, the sparse representation property of the wavelet transform provides an improvement in the compression ratio. Also, the degradation inserted by the lossy compression process is minimized. Simulation results confirm the effectiveness of the proposed method when compared to the standard solution, characterized by the compression of the whole monitored signal. (AU)