| 电网谐波分析的频率估计与跟踪 |
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| 引用本文： | 王柏林,黄廷波.电网谐波分析的频率估计与跟踪[J].电测与仪表,2005,42(9):9-12. |
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| 作者姓名： | 王柏林 黄廷波 |
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| 作者单位： | 河海大学,电气工程学院,南京,210098;河海大学,电气工程学院,南京,210098 |
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| 摘 要： | 针对多频周期信号推导出一组频率估计公式，并给出了一种电网谐波分析的频率估计与跟踪方法。频率估计公式包括采样序列DFT、相位差计算和频率计算。频率跟踪就是依据前一次频率估计修改下一次采样的采样间隔，从而使同步偏差越来越小。对于电力信号，这种方法能完成实时、高精度的谐波分析，而且计算量非常小。Matlab仿真证实了方法的有效性。
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| 关 键 词： | 谐波分析 DFT 同步采样 频率估计 频率跟踪 |
| 文章编号： | 1001-1390（2005）09-0009-04 |
| 收稿时间： | 2005-06-01 |
| 修稿时间： | 2005-06-01 |
Frequency Estimation and Tracking for Harmonics Analysis of Power Systems |
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| WANG Bo-lin,HUANG Ting-bo.Frequency Estimation and Tracking for Harmonics Analysis of Power Systems[J].Electrical Measurement & Instrumentation,2005,42(9):9-12. |
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| Authors: | WANG Bo-lin HUANG Ting-bo |
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| Abstract: | In this paper,a set of formulas for frequency estimation of multiple frequency signal is deduced and a method of frequency estimation and tracking fo r harmonics analysis of power systems is developed. The set of formulas consists of DFT of sampled data,phase difference calculation and frequency calculation. Frequency tracking means that sampling intervals of following sampling is updat ed according to new frequency estimation,so the synchronous sampling error will be reduced step by step. The method can provide very high accurate for real tim e harmonics analysis of power signal and it's computation is very simply. Matla b simulations show efficiency of the method. |
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| Keywords: | DFT |
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