基于频谱分析的闪变值测量法  

Measurement Algorithm of Flicker Based on Spectrum Analysis

作　　者：陈琛[1] 杨仁刚[1] 

机构地区：[1]中国农业大学信息与电气工程学院,北京100083

出　　处：《电测与仪表》2010年第4期45-48,共4页Electrical Measurement & Instrumentation

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。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 sampling has also brought the error,in the experiment we have by adjusting the initial phase angle of the carrier to reduce these errors.

关 键 词：频谱分析法 短时闪变值 FFT变换 初相角 

分 类 号：TM933[电气工程—电力电子与电力传动]