Specifications

Radar, Radio and Television - 711 Electromagnetic Waves - 717 Optical Communication
DOI: 10.1016/j.optlaseng.2013.06.005
Database: Compendex
Compilation and indexing terms, © 2013 Elsevier Inc.
7.
Accession number: 20132716470903
Title: Application of fast S-transform in power quality analysis
Authors: Zhang, Zhiyu1 ; Man, Weishi1 ; Xi, Lei1 ; Huang, Luyao1/张志禹;;;;
Author affiliation:
1 School of Automation, Xi'an University of Technology, Xi'an 710048, Shaanxi Province, China
Corresponding author: Zhang, Z. ([e-mail])
Source title: Dianwang Jishu/Power System Technology
Abbreviated source title: Dianwang Jishu
Volume: 37
Issue: 5
Issue date: May 2013
Publication year: 2013
Pages: 1285-1290
Language: Chinese
ISSN: 10003673
CODEN: DIJIES
Document type: Journal article (JA)
Publisher: Power System Technology Press, China Electric Power Research Institute,
Qinghe, Bejing, 100085, China
Abstract: S transform is a time-frequency transform with adaptive resolution, which is
widely used in analyzing the power quality recently. However, the traditional S transform is very
computation-intensive (O(N3) time complexity) and difficult to meet the real-time requirements.
A new fast S transform (FST) algorithm (O(N log N) time complexity) is introduced to analyze the
power quality, which can differentiate the different voltage disturbances in the FST domain, and
denoise the voltage disturbances. Compared with the traditional S-transform in terms of
efficiency, simulation results show that the different voltage disturbances have different
coefficient manifestations in the FST domain, and the original time-domain voltage signal is
recovered after the voltage noise disturbances are suppressed with FST algorithm. The FST
algorithm shows better real-time in view of computational time and memory share.
Number of references: 20
Main heading: Computational complexity
Controlled terms: Algorithms - Error detection - Power quality
Uncontrolled terms: Computational time and memory - De-noising - Fast s
transforms - Power-quality analysis - Real time
requirement - Real-time - Time-frequency transforms - Voltage disturbances
Classification code: 706.1.2 Electric Power Distribution - 721.1 Computer Theory, Includes
Formal Logic, Automata Theory, Switching Theory, Programming Theory - 723 Computer
Software, Data Handling and Applications - 921 Mathematics