基于MSLDSMC窗的谐波与间谐波参数估计算法

Harmonic and Inter-Harmonic Parameter Estimation Algorithm Based on MSLDSMC Window

快速傅里叶变换(FFT)方法在谐波检测过程中会出现频谱泄漏和栅栏效应,导致谐波与间谐波参数的检测精度不高.为了提高估计精度,利用最大旁瓣衰减窗(MSLD)进行乘积和卷积运算,构建出旁瓣性能优越的MSLD自乘卷积窗(MSLDSMC),并在此基础上设计了一种三谱线插值的高精度谐波与间谐波参数估计算法.在不同复杂场景下进行仿真实验,实验结果验证了基于MSLDSMC窗三谱线插值的谐波与间谐波参数估计算法检测的准确性.

The fast Fourier transform(FFT)method may encounter spectral leakage and picket fence effect in harmonic detection,resulting in low accuracy in detecting harmonic and inter-harmonic parameters.To improve the detection accuracy,based on the maximum side lobe decay window(MSLD)with excellent sidelobe characteristics,we have constructe an MSLD self-multiplication-convolution window(MSLDSMC)by multiplication and convolution operations.On this basis we propos a high-precision estimation algorithm for harmonic and inter-harmonic parameters of three spectral line interpolation.Simulation experiments conducted in different complex scenarios verify the accuracy of harmonic and inter-harmonic parameter estimation algorithms based on MSLDSMC window three spectral line interpolation.