基于小波技术的电网暂态谐波检测  

Detection of Transient Harmonics in Grid Based on Wavelet Techniques

作　　者：刘蓉晖[1] 

机构地区：[1]上海电力学院电力与自动化工程学院,上海200090

出　　处：《低压电器》2011年第4期47-50,共4页Low Voltage Apparatus

基　　金：上海市教育委员会重点学科建设项目(J51303)

摘　　要：阐述了小波变换、小波包变换和平稳小波变换的基本原理,说明了小波包变换能更有效地进行谐波的检测和分析。针对噪声环境下的谐波信号,提出了具有平移不变特性的平稳小波变换的去噪方法。最后,对电网暂态谐波和间谐波的检测进行了仿真。仿真结果表明,该方法有良好的去噪效果,能够准确地检测暂态谐波信号,为电网中的谐波治理提供依据。The basic principles of wavelet transform、wavelet packet transform and stationary wavelet transform were presented.The wavelet packet transform had good characteristics of uniform frequency decomposition;and the noisy signals could be de-noised by translation invariant de-nosing.In the end,the transient harmonic detection were simulated with emulator.The simulation results showed that transient harmonic signals could be de-noised and detected accurately by the proposed method in this paper,which provided support for harmonic analysis in power system.

关 键 词：谐波检测 小波包变换 去噪 暂态谐波 电能质量 

分 类 号：TM711[电气工程—电力系统及自动化] TM74