基于Harr小波的时变谐波检测  

Time-varying Transient Harmonics Measurement Based on Harr Wavelet

作　　者：王文勇[1] 

机构地区：[1]国电南京自动化股份有限公司,江苏省南京市211100

出　　处：《电力系统自动化》2007年第20期80-83,88,共5页Automation of Electric Power Systems

摘　　要：电力系统中,实际的波形总存在不同程度的非正弦畸变。文中利用Harr小波对时变谐波进行检测。不是用Harr小波将信号分解到不同的频带上,而是利用该小波基对时变谐波的幅值和相角进行逼近。给出了电力系统时变谐波检测算法的推导及流程。通过仿真分析与对比,验证了此算法的可行性和精度。In consideration of the non-sinusoidal distortion that often exists in practical power system signals,a method for time-varying harmonic detection using Harr wavelet is put forth in this paper.The method employs Harr wavelet bases to approximate amplitudes and phases of the time-varying harmonics instead of decomposing them into different frequency banks.The algorithm of the time-varying harmonic detection for power system is derived as well as the flowchart of the process is provided in detail.Finally,the feasibility of the algorithm is verified by simulation and experimental comparison.

关 键 词：时变谐波检测 电力系统 波形畸变 Harr小波 

分 类 号：TM935[电气工程—电力电子与电力传动]