刘佳,霍利民,李爱锋,臧斌,张增娟.基于希尔伯特-黄变换和小波变换的500kV变电站谐振数据对比分析[J].电测与仪表,2016,53(7):. LIU Jia,HUO Li-min,LI Ai-feng,ZANG Bin,ZHANG Zeng-juan.A Comparison Research on HHT and WT for Harmonic Analysis of the data of a 500kV Substation[J].Electrical Measurement & Instrumentation,2016,53(7):.
基于希尔伯特-黄变换和小波变换的500kV变电站谐振数据对比分析
A Comparison Research on HHT and WT for Harmonic Analysis of the data of a 500kV Substation
Harmonic data analysis is the foundation of the real-time monitoring device development and the harmonic suppression. In this paper, the HHT and WT are both used to carry on the contrast analysis to the actual harmonic data of a 500kV substation. First, the intrinsic mode functions(IMF) of the harmonic data is obtained through empirical mode decomposition (EMD), then the instantaneous frequency and instantaneous amplitude of each IMF component is obtained by the Hilbert transform in each IMF; then the appropriate wavelet was selected to analyze the same group of harmonic data; the paper finally summarizes the amplitude frequency characteristics of a 500kV substation harmonic data and the advantages and disadvantages of two kinds of detection method.
