摘要
加窗插值可以有效抑制频谱泄漏和栅栏效应,改善FFT算法的谐波分析精度。分析比较了Hanning窗和5项Rife_Vincent窗(R_V窗)的频谱特性,推导了2种窗对应的偏差修正公式。提出了一种根据时域采样点的相对误差计算方法并用于比较窗函数的谐波分析精度。仿真实验与实例计算验证了R_V窗插值算法的正确性,且较Hanning窗插值算法精度更高。
Windowing and interpolation can inhibit the effects of spectral leakage and fence, and improve the accuracy of the FFT algorithm in harmonic analysis. The paper compares the spectral characteristics of Harming window and five Rife Vincent window （R_V window） and then succeeds in deducing the corresponding deviation correction formula. A relative error calculation method based on time-domain samples is proposed and used to compare accuracies of harmonic analysis of window function. Simulation and calculation examples have verified that the R V window interpolation algorithm is correct and has higher accuracy than the Hanning window.
出处
《电网与清洁能源》
2013年第3期7-11,共5页
Power System and Clean Energy
基金
国家自然科学基金项目(50907075)~~
