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Harmonic detection based on Hanning window imterpolation FFT algorithm
Pages: 3089-3091
Year: Issue:  z1
Journal: East China Electric Power

Keyword:  Fast Fourier TransformerHanning WindowHarmonic Analysis;
Abstract: 如今的电网中存在着各种谐波源产生的谐波,对供电质量产生很大的影响.通过加窗以及采用插值修正算法可以改善计算谐波频率、相位和幅值的准确度.基于快速傅里叶变换、窗函数和插值修正算法的原理,首先验证快速傅里叶变换算法的优越性;然后给出基于Hanning窗的插值系数公式,并通过Matlab仿真,对根据不同窗函数的特性进行分析比较,并以验证算法的有效性;最后着重分析Hanning窗的特点,验证Hanning窗插值FFT的谐波分析方法的实用性.
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