基于离散小波多分辨率分析的电网谐波检测法  

Power System Harmonic Detection based on Discrete Wavelet Multi-resolution Analysis

作　　者：梁博渊[1] 

机构地区：[1]华北电力大学电气与电子工程学院,河北保定071003

出　　处：《陕西电力》2010年第8期53-56,共4页Shanxi Electric Power

摘　　要：电力系统中存在大量由非线性器件对电网电压和电流整流、逆变而产生的时变谐波。傅里叶变换是应用最为广泛的谐波检测方法,但其不适于时变谐波的检测分析。采用离散小波多分辨率分析方法对电网中的谐波进行检测分析,仿真结果表明,离散小波变换具有良好的时频局部化特性,可以对电网中的谐波进行有效的检测分析。There are many time-varying harmonics caused by the non-linear instruments that rectify or invert the current or voltage of the power system.Fourier transform is the most widely used harmonic detection methods,but it＇ s not suitable for time-varying harmonic detection.In this paper,discrete wavelet multi-resolution algorithm is used to detect power system harmonic,the simulation results show that the method has a good time-frequency localization properties,can detect and analyze the harmonic effectively.

关 键 词：离散小波变换 多分辨率分析 谐波检测 电能质量 

分 类 号：TM711[电气工程—电力系统及自动化]