摘要
随着电子电力技术的发展,间谐波检测对电能质量的提高变得更重要。对已经运用的FFT间谐波检测技术进行分析,对双阶段分析方法进行研究,显示出表明双阶段分析法的精确性和可行性有了一定的进步。第一阶段,把谐波部分从原始信号中过滤出来,这样就能够在第二阶段把没有因为非同步采样引起的频谱泄露问题而影响的间谐波给检测出来,此外,利用MATLAB仿真软件进行计算机仿真试验。
With the development of power electronics technology,inter-harmonic analysis becomes increrasingly important for power quality. This paper introduce several kinds of FFT inter-harmonic analysis technology,and the double-stage technique which has shown good accuracy and robustness. In the first stage,the harmonic components are accurately estimated via interpolations in frequency domain and filtered away from the original signal so that in the second stage,inter-harmonics can be evaluated without the spectral leakage due to harmonic tones. Since the procedure does not require synchronization,it allows adopting a fixed sampling frequency. The computer simulation is made by using MATLAB.
出处
《农业科技与装备》
2011年第2期72-74,共3页
Agricultural Science & Technology and Equipment
