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Power System Time-Varying Transient Harmonics Detection Based on SWT Accession number: 20173904205065 Authors: Yu, Min 1 ; Wang, Bin 1 ; Wang, Wenbo 2 ; Zhang, Liangli 1 ; Cheng, Yongzhi 1 Author affiliations : 1 College of Information Science and Engineering, Wuhan University of Science and Technology, Wuhan; 430081, China 2 School of Science, Wuhan University of Science and Technology, Wuhan; 430065, China Corresponding author: Wang, Bin (binwang907@163.com) Source title: Diangong Jishu Xuebao/Transactions of China Electrotechnical Society Abbreviated source title: Diangong Jishu Xuebao Volume: 32 Issue date: July 30, 2017 Publication Year: 2017 Pages: 50-57 Language: Chinese ISSN: 10006753 CODEN: DIJXE5 Document type: Journal article (JA) Publisher: Chinese Machine Press Abstract: In this paper, a new method for time-varying harmonic detection in the noisy interference background is put forward using synchrosqueezed wavelet transform (SWT). Firstly, the SWT algorithm is applied to decompose the time-varying harmonic signal mixed with noise into a series of intrinsic mode type functions (IMTs), then extracts the harmonic, the instantaneous amplitue, instantaneous frenquency and the starting and ending time of harmonic disturbance are obtained applying Hilbert transform to IMTs. The harmonic parameters are gained precisely by Hilbert transform based on the accurate mode seperation ability of SWT. The proposed SWT method has higher harmonic extration precision for multiple harmonic signals and better robustness against noise compared to traditional HHT. The simulation and real data tests show that the proposed method can extract each mode accurately in the noisy environment, and the validity of the proposed method is verified by time-varying harmonic dection. © 2017, The editorial office of Transaction of China Electrotechnical Society. All right reserved. Number of references: 26 Main heading: Harmonic analysis Controlled terms: Harmonic distortion - Wavelet transforms Uncontrolled terms: Harmonic detection - Hilbert Huang transforms - Noise - Synchrosque-ezed wavelet transforms - Time-varying harmonics Classification code: 716.1Information Theory and Signal Processing - 921.3Mathematical Transformations - 921.6Numerical Methods DOI: 10.19595/j.cnki.1000-6753.tces.L70483 Database: Compendex Compilation and indexing terms, © 2018 Elsevier Inc. |
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