摘要
随着电力电子技术的广泛应用,谐波对电力系统的污染越来越严重,检测、分析和抑制谐波已经成为电力系统环境治理的重要课题。利用小波变换及传统的傅立叶变换对电网中的谐波进行了检测、分析,并通过MATLAB进行了仿真。仿真结果表明,利用小波变换可以将信号中不同频率的谐波有效地提取出来,并进行有针对性的分析,具有更高的分析精度。
As the application of power-electron technology widely, the harmonic pollution is more and more serious to power system. The detection, the analysis and the control to harmonic has been an important subject for environment government of power system. Harmonics in power systems were detected and analyzed by means of wavelet transform and traditional Fourier transform, and the simulation with MATLAB was passed. The simulating result show that the harmonics with different frequencies can be separated from the sampled signal and be analyzed pertinently based on wavelet transform, it reaches a more reasonable accuracy than Fourier transform.
出处
《机电工程》
CAS
2007年第1期7-9,共3页
Journal of Mechanical & Electrical Engineering
关键词
谐波
傅立叶变换
小波变换
电力系统
harmonic
Fourier transform
wavelet transform
power system
