NDLI: Simultaneous denoising and compression of power system disturbances using sparse representation on overcomplete hybrid dictionaries

Content Provider	IET Digital Library
Author	Manikandan, M. Sabarimalai Samantaray, Subhransu Ranjan Kamwa, Innocent
Abstract	This study introduces a novel unified framework for simultaneous denoising and compression of electric power system disturbance signals using sparse signal decomposition and reconstruction on overcomplete hybrid dictionary (OHD) matrix. In the proposed method, the power quality signal is first decomposed into deterministic sinusoidal components and non-deterministic components using the OHD matrix, including discrete impulse dictionary ( I ), cosine dictionary ( C ), sine dictionary ( S ) and the ℓ1-norm optimisation algorithm. Then, the hard-thresholding, uniform threshold dead-zone quantisation, modified index coding and Huffman coding techniques are used for compression of significant detail signal samples and approximation coefficients. To justify the selection of OHD matrix, four compression methods are implemented using the decomposition techniques based on the dictionaries Ψ = [ I C S ] and Ψ = [ I C ], the wavelet transform (WT) and the discrete cosine transform (DCT). The performance of each method is tested and validated using a wide variety of typical power quality disturbance (PQD) signals taken from the IEEE-1159-PQE and GIM–PQE databases and generated using the Microgrid model. The results show that the method with dictionary Ψ = [ I C S ] is capable of effectively compressing the PQD signals as well as suppressing the noise components in the signals.
Starting Page	1077
Ending Page	1088
Page Count	12
ISSN	17518687
Volume Number	9
e-ISSN	17518695
Issue Number	Issue 11, Aug (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/9/11
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2014.0806
Journal	IET Generation, Transmission & Distribution
Publisher Date	2015-02-20
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Code Cosine Dictionary Deterministic Sinusoidal Component Dictionaries Discrete Cosine Transform Discrete Impulse Dictionary Distributed Power Generation Electric Power System Disturbance Signal GIM–PQE Databases Hard Thresholding Harmonics Huffman Code Huffman Coding IEEE-1159-PQE Integral Transforms Microgrid System Modified Index Coding Nondeterministic Component Overcomplete Hybrid Dictionary Matrix Power Quality Disturbance Signal Power Quality Signal Power Supply Quality Power System Disturbances Power System Fault Signal Denoising Signal Processing And Detection Signal Reconstruction Signal Representation Simultaneous Compression Simultaneous Denoising Sparse Representation Sparse Signal Decomposition Sparse Signal Reconstruction Unified Framework Uniform Threshold Dead-zone Quantisation Wavelet Transform ℓ1-norm Optimisation
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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