| 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 |
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| 引用本文： | 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):107-112. |
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| 作者姓名： | 刘佳 霍利民 李爱锋 臧斌 张增娟 |
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| 作者单位： | 1. 河北农业大学机电工程学院,河北保定,071001;2. 保定和易法电气科技有限公司,河北保定,071051;3. 国网冀北电力有限公司检修分公司,北京,102488 |
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| 基金项目： | 保定市科技局项目(14ZG029)，国网冀北电力有限公司(8HE000M14001) |
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| 摘 要： | 谐振数据分析是谐振实时监测装置研制和谐振抑制的基础。文章对500 k V变电站实际谐振数据,采用希尔伯特-黄变换和小波变换方法进行对比分析。首先对谐振数据进行经验模态分解(EMD)得到谐波信号的本征模态函数(IMF),再对各个IMF进行希尔伯特变换,获得各个IMF分量的瞬时频率和瞬时幅度;然后选取合适的小波基对同组谐振数据进行分析;最后总结了两种检测方法的优缺点和500 k V变电站实际谐振谐波成分的幅频特性。
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| 关 键 词： | 电力系统 谐振 希尔伯特-黄变换 小波变换 |
| 收稿时间： | 2015/5/18 0:00:00 |
| 修稿时间： | 2015/11/13 0:00:00 |
A Comparison Research on HHT and WT for Harmonic Analysis of the data of a 500kV Substation |
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| LIU Ji,HUO Li-min,LI Ai-feng,ZANG Bin and 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):107-112. |
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| Authors: | LIU Ji HUO Li-min LI Ai-feng ZANG Bin and ZHANG Zeng-juan |
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| Affiliation: | Mechanical and Electrical College,Hebei Agricultural University,Mechanical and Electrical College,Hebei Agricultural University,HEREFAR,Chinese Hebei north electric Co LTD Maintenance branch,HEREFAR |
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| Abstract: | 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. |
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| Keywords: | power system harmonic resonance Hilbert-Huang transform wavelet transform |
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