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HHT在电压闪变测量中的应用

发表时间:2010-11-30  浏览量:1498  下载量:650
全部作者: 李子雅
作者单位: 河海大学能源与电气学院
摘 要: 首先,在Matlab仿真工具的帮助下对国际电工委员会(International Electrical Commission, IEC)提供的电压闪变仪模型进行仿真研究。然后,在IEC推荐的电压闪变仪基础上提出一种基于希尔伯特-黄变换(Hilbert-Huang transform, HHT)的电压闪变测量方法。主要结合电压闪变的一些特殊性质,研究分析HHT在分析电压波动信号时的处理方法。针对HHT的特点,结合理论与仿真结果表明:HHT的核心组成部分经验模态分解(empirical mode decomposition,EMD)的自适应特性使得该处理方法非常适用于闪变的电压检测。经过Matlab仿真得到的结果表明:HHT可以应用于该信号的提取,并且利用HHT检测电压闪变,得到的数据结果比IEC推荐的误差小,即得出的视感度效果比IEC提供的模型效果好,完全符合IEC标准。
关 键 词: 信号检测;希尔伯特-黄变换;电压闪变;IEC标准;Matlab
Title: Application of HHT in the voltage-flicker-meter's measurement
Author: LI Ziya
Organization: Department of Energy and Electric, Hohai University
Abstract: With the help of Matlab simulation tool, simulation on the IEC (International Electrical Commission) model is provided in this paper. Then on the basis of IEC flicker meter, a measurement of voltage flicker which is based on the Hilbert-Huang transform (HHT). Mainly with some special properties of voltage flicker, the treatment is studied and analyzed when HHT analyzes voltage fluctuations. For HHT features, combined with theoretical and simulation results show that, empirical mode decomposition (EMD) as the core component of HHT, whose adaptive features make this treatment method very suitable for the voltage flicker detection. The results of Matlab simulation of HHT show that HHT can be applied to the extraction of the signal. And the error of the data obtained from the results is smaller than the IEC recommendation, which indicates that the resulting visual sensitivity is better than the model provided by IEC, fully in line with IEC standards. Therefore, the HHT method used in the study of flicker meter is desirable.
Key words: signal detection; Hilbert-Huang transform; voltage flicker; International Electrical Commission standards; Matlab
发表期数: 2010年11月第22期
引用格式: 李子雅. HHT在电压闪变测量中的应用[J]. 中国科技论文在线精品论文,2010,3(22):2305-2310.
 
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