2001/04/01 by Fusheng Zhang, Zhongxing Geng, Wei Yuan +1
Engineering · Materials Science · #Advanced Electrical Measurement Techniques #Magnetic Properties and Applications #Power Quality and Harmonics
paper · doi:10.1109/61.915476
openalex publication_date 2001/04/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/06/11
The fast Fourier transform (FFT) cannot be directly used in the harmonic analysis of an electric power system because of its higher errors, especially the phase error. This paper discusses the leakage phenomenon of FFT and presents a new amending algorithm, poly-item cosine window interpolation, which is based on the interpolating algorithm proposed by V. Jain and T Grandke. This new algorithm improves the accuracy of the FFT, so it can be applied to the precision analysis for electrical harmonics. The simulation result shows that applying different windows has different effects on the accuracy, and the Blackman-Harris window has the highest accuracy.