摘要
电力系统中的谐波对电网危害巨大,对其进行监测和分析就显得非常重要。在谐波小波以及谐波小波包的基础上,提出谐波小波变换的表达式以及谐波小波算法,给出电力系统谐波分析的仿真示例。仿真结果表明,利用谐波小波变换分解,并通过最小二乘法拟合出的各次谐波频率和幅度的误差率完全符合谐波分析的精度要求。在电力系统谐波的分析中,谐波小波算法具有其他算法无可比拟的优越性。
Harmonics in power system are harmful to power network. It is significant to detect and analyze them. On the basis of harmonic wavelet and harmonic wavelet packet, the expression of harmonic wavelet transform and the algorithm of harmonic wavelet are proposed and then a simulation example of harmonic analysis in power system is given. The simulation results show that the error rate of each harmonic frequency and amplitude corresponds to the accuracy requirement of harmonic analysis completely with the decomposition of harmonic wavelet transform and least square method fitting. The algorithm of harmonic wavelet is superior to the others in harmonic analysis of power system.
出处
《现代电子技术》
2009年第5期159-162,166,共5页
Modern Electronics Technique
关键词
谐波小波
谐波分析
电力系统
谐波
间谐波
最小二乘法拟合
harmonic waveler
harmonic analysis
power system
harmonics
inter - harmonics
least square method fitting
