基于广义双曲S变换的电能质量快速检测算法Rapid Power Quality Detection Algorithm Based on Generalized HS-transform
王晓光,范彦君
WANG Xiaoguang,FAN Yanjun
摘要(Abstract)：
针对双曲S变换检测电能质量扰动存在抗噪性差、计算量大的问题,对双曲S变换进行了改进,提出一种广义双曲S变换,使得双曲S窗函数与频率的平方根成正比,且引入了整体时频调节因子,并结合不完全S变换的思想,提出了基于广义双曲S变换的电能质量快速检测算法。该算法根据信号功率谱包络的动态测度确定主要频率点,只针对主要频率点进行广义双曲S变换,进而从变换所得的复数矩阵中提取特征量,实现对各种电能质量扰动的检测分析。仿真结果表明该算法具有检测精确度高、实时性好的特点,而且对噪声的敏感度很低,适合实际应用。
For poor noise immunity and large calculation amount of power quality detection by hyperbolic Stransform(HS-transform), HS-transform is improved. The paper presents a generalized HS-transform to enable window function of HS to be proportionate to square root of frequency; moreover, it introduces overall timefrequency regulatory factors and presents a rapid power quality detection algorithm based on generalized HStransformation in combination with incomplete S-transform. The algorithm determines main frequency points in accordance with dynamic measures of signal power spectrum and performs generalized HS-transform for main frequency points so as to extract characteristic quantity from complex matrix to detect and analyze power quality disturbances. The simulation result shows that the algorithm is of high measurement accuracy and realtime; in addition, it is not quite sensitive to noise and can be practically applied.
关键词(KeyWords)：
广义双曲S变换;电能质量;动态测度;快速检测
generalized HS-transformation;power quality;dynamic measurement;rapid detection
基金项目(Foundation):
作者(Author):
王晓光,范彦君
WANG Xiaoguang,FAN Yanjun
DOI: 10.19585/j.zjdl.2015.11.008
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