基于三阶Hanning卷积窗的谐波检测方法研究

摘要

为减少谐波分析结果的误差，提出一种基于三阶Hanning卷积窗的谐波分析方法。在用公式详细探讨加窗插值算法原理的基础上．利用Matlab仿真试验验证算法的分析精度。MATLAB仿真结果表明，三阶Hanning卷积窗具有优良的频谱抑制性能，可进行电力谐波的高精度检测。%In order to reduce errors in harmonic analysis, a harmonic analysis method based on 3-order haining convolution window is put forward. The interpolating windowed FFT algorithm can effectively reduce spectral leakage and fence effect on harmonic analysis accuracy. This author analyzes the interpolation algorithm in detail. The Matlab simulation results show that 3-order Hanning convolution window has excellent spectrum inhibition performance, suitable for power harmonic detection with high precision, and with the existing windowed interpolation algorithm, the precision is improved obviously.