| 基于频谱分析的闪变值测量法 |
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| 引用本文： | 陈琛,杨仁刚.基于频谱分析的闪变值测量法[J].电测与仪表,2010,47(4). |
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| 作者姓名： | 陈琛 杨仁刚 |
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| 作者单位： | 中国农业大学,信息与电气工程学院,北京,100083;中国农业大学,信息与电气工程学院,北京,100083 |
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| 摘 要： | 在IEC闪变测量原理的基础上,提出基于频谱分析测量闪变值的算法。算法的核心是对半波有效值进行FFT变换,得到各个频率下的频谱值,对频谱序列进行加权得到瞬时闪变视感度,利用统计的方法算出短时闪变值。这种方法对于高频段引起的闪变有较大误差,同时,离散化采样也带来误差,在实验中我们通过调整载波的初相角来减小这些误差。
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| 关 键 词： | 频谱分析法 短时闪变值 FFT变换 初相角 |
Measurement Algorithm of Flicker Based on Spectrum Analysis |
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| CHEN Chen,YANG Ren-gang.Measurement Algorithm of Flicker Based on Spectrum Analysis[J].Electrical Measurement & Instrumentation,2010,47(4). |
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| Authors: | CHEN Chen YANG Ren-gang |
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| Affiliation: | CHEN Chen,YANG Ren-gang(College ofInformation , Electrical Engineering,China Agricultural University,Beijing100083,China) |
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| Abstract: | Based on the flicker measurement principle in the IEC,a new algorithm for the measurement of flicker is proposed on the basis of spectrum analysis.The core algorithm is the FFT to transform the half-wave RMS to obtain the value of each frequency spectrum.Then the instantaneous flicker visual sensitivity is calculated by weighting the value of the spectrum,the value of short term severity is obtained using statistical methods.This method for high frequency flicker caused by larger errors,while the discrete s... |
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| Keywords: | spectrum analysis short term severity FFT transformation initial phase angle |
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