The algorithm of interpolating windowed FFT for harmonic analysis of electric power system
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- 1 April 2001
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Power Delivery
- Vol. 16 (2), 160-164
- https://doi.org/10.1109/61.915476
Abstract
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.Keywords
This publication has 3 references indexed in Scilit:
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- High-Accuracy Analog Measurements via Interpolated FFTIEEE Transactions on Instrumentation and Measurement, 1979
- On the use of windows for harmonic analysis with the discrete Fourier transformProceedings of the IEEE, 1978