Journal ArticleDOI
Close Accord on DWT Performance and Real-Time Implementation for Protection Applications
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TLDR
A simpler and faster algorithm of discrete wavelet transform (DWT) for a digital signal processing (DSP) implementation is proposed and intensively tested and its implementation is exploited to investigate the DWT response experimentally.Abstract:
In this paper, a simpler and faster algorithm of discrete wavelet transform (DWT) for a digital signal processing (DSP) implementation is proposed and intensively tested. Applicability of real-time implementation of this algorithm is verified. The computational frame in this algorithm is independent on the sampling rate, but it depends on the length of the mother wavelet filters. Therefore, signal with any sampling rate can be analyzed with the same computational effort. This implementation algorithm is exploited to investigate the DWT response experimentally. Impact of the mother wavelet, sampling frequency, fault inception angle and the signal transients on the resulted DWT levels is evaluated from the protection perspectives. Considering the DSP channel noise, these factors are strongly affect DWT response especially in high details spike, which the most of the protection applications depended on. Shortcomings of DWT application for protection relays are outlined and corrective recommendations are included.read more
Citations
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Fault-Induced Transient Detection Based on Real-Time Analysis of the Wavelet Coefficient Energy
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Diagnosis and classification of stator winding insulation faults on a three-phase induction motor using wavelet and MNN
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Proceedings ArticleDOI
Fault-induced transient detection based on real-time analysis of the wavelet coefficient energy
TL;DR: This paper presents a novel wavelet-based methodology for real-time detection of fault-induced transients in transmission lines, where the wavelet coefficient energy takes into account the border effects of the sliding windows, and the performance of the proposed energy analysis is not affected by the choice of the mother wavelet.
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A General Travelling-Wave-Based Scheme for Locating Simultaneous Faults in Transmission Lines
TL;DR: An advanced fault location algorithm to detect, discriminate, and locate single and simultaneous shunt faults in transmission lines using a combination of single- and double-end techniques and travelling wave fault signature is presented.
References
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Journal ArticleDOI
Wavelets and electromagnetic power system transients
TL;DR: The wavelet transform was introduced as a method for analyzing electromagnetic transients associated with power system faults and switching as mentioned in this paper, and it is more appropriate than the familiar Fourier methods for the nonperiodic, wide-band signals associated with EM transients.
Journal ArticleDOI
Transmission line distance protection based on wavelet transform
Ahmed Osman,Om P. Malik +1 more
TL;DR: In this paper, a digital distance-protection scheme for transmission lines based on analyzing the measured voltage and current signals at the relay location using wavelet transform with multiresolution analysis (MRA) is presented.
Journal ArticleDOI
Wavelet-transform-based algorithm for harmonic analysis of power system waveforms
V.L. Pham,Kit Po Wong +1 more
TL;DR: In this paper, a wavelet transform based approach is proposed for the evaluation of the harmonic contents of power system waveforms, which can simultaneously identify all harmonics including integer, noninteger and subharmonics.
Journal ArticleDOI
Optimization and implementation of the integer wavelet transform for image coding
TL;DR: A VLSI architecture is proposed for the IWT implementation, capable of achieving very high frame rates with moderate gate complexity and the effects of finite precision representation of the lifting coefficients on the compression performance are analyzed.