摘要
利用小波变换的频带划分能力和小波熵对扰动信号检测能力,结合傅立叶变换准确的频域分辨能力,提出一种基于傅立叶变换及小波能量熵联合的电力系统谐波检测改进算法。分析了快速小波变换中小波混叠产生的原因,并提出解决方法。根据电力系统谐波的特点,建立谐波信号数学模型,基于该模型利用Matlab对算法进行仿真验证;利用DSP实验台,对改进算法进行实用化测试。
Based on the distinct characters of WEE （wavelet energy entropy） and FFT, this paper put forwards a novel algorithm to detect the power system harmonic by integrating them together. After analyzing the reason in wavelet aliasing, a method is proposed to solve the problems caused by Wavelet aliasing. According to the harmonic characters in power system, a mathematic model is established to simulate the power system harmonic, and the simulation of novel algorithm is done based on it by using Matlab. The novel algorithm is also validated through running on DSP.
出处
《工业仪表与自动化装置》
2010年第1期6-10,33,共6页
Industrial Instrumentation & Automation
关键词
电力系统
小波能量熵
小波变换
power system
wavelet energy entropy
wavelet transform
