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[1]应展烽,吴军基,易文俊.基于小波变换和三点法的基波频率测量[J].电机与控制学报,2010,(02):65-70.
 YING Zhang-feng,WU Jun-ji,YI Wen-jun.Study on frequency detection based on wavelet transform and three-point algorithm[J].,2010,(02):65-70.
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基于小波变换和三点法的基波频率测量(PDF)
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《电机与控制学报》[ISSN:1007-449X/CN:23-1 408/TM]

卷:
期数:
2010年02
页码:
65-70
栏目:
出版日期:
2010-02-28

文章信息/Info

Title:
Study on frequency detection based on wavelet transform and three-point algorithm
作者:
应展烽; 吴军基; 易文俊
南京理工大学动力工程学院
Author(s):
YING Zhang-feng; WU Jun-ji; YI Wen-jun
School of Power Engineering; Nanjing University of Science & Technology; Nanjing; 210094; China
关键词:
频率检测 三点法 误差分析 小波变换 非同步采样
Keywords:
frequency detection three-point algorithm error analysis wavelet transform asynchronous sampling
分类号:
TM935
DOI:
-
文献标志码:
A
摘要:
小波变换可以在非同步交流采样情况下,提取畸变信号中的基波分量,但检测结果存在少许误差。三点法可通过任意三个等间隔检测点提取正弦信号频率,但检测点误差会严重影响测频精度。对三点法误差的数学机理进行分析发现,合理的选择检测点之间的间隔可以使结果误差最小。极值分析和牛顿迭代法可被用来近似计算最优检测点间隔。通过误差的抑制和个别较大误差结果的剔除,小波变换能与三点法结合对电网中畸变信号的基波频率进行高精度检测。仿真算例证明本文算法精度要优于小波变换与过零法或极值法结合的算法精度。
Abstract:
Fundamental component can be extracted from distorted signal by wavelet transform under asynchronous sampling.But there are a few errors in the results.The three-point algorithm can be used to detect sinusoidal signal frequency by any three equal interval detection points.But the errors of detection point might seriously affect detection precision.The analysis on mathematics mechanism of three-point algorithm errors proved that the errors can be reduced to the greatest degree by choosing points number betwe...

参考文献/References:

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备注/Memo

备注/Memo:
-
更新日期/Last Update: 2010-06-03