电工技术学报2017，Vol.32Issue(z1)：50-57,8.DOI:10.19595/j.cnki.1000-6753.tces.L70483
基于同步挤压小波变换的电力系统时变谐波检测
Power System Time-Varying Transient Harmonics Detection Based on SWT
摘要
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.关键词
同步挤压小波变换/时变谐波/希尔伯特-黄变换/噪声/谐波检测Key words
Synchrosqueezed wavelet transform (SWT)/time-varying harmonic/Hilbert-Huang transform (HHT)/noise/harmonic detection分类
信息技术与安全科学引用本文复制引用
喻敏,王斌,王文波,张良力,程用志..基于同步挤压小波变换的电力系统时变谐波检测[J].电工技术学报,2017,32(z1):50-57,8.基金项目
国家自然科学基金(51407131,61671338,61473338)和冶金工业过程系统科学湖北省重点实验室开放基金(Y201506)资助项目. （51407131,61671338,61473338）
