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《Proceedings of the Csee》 1999-03
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Zhang Fusheng Xian Jiaotong University Xian,710049 China Geng Zhongxing Research Center for Aviation Engineering and Technology,Beijing 100076 China Ge Yaozhong Xian Jiaotong University Xian,710049 China  
The FFT has a higher error in the harmonic analysis of the electric power system, especially for the phases. This paper discussed the leakage of FFT and presented a new amending algorithm, poly-cosin window interpolation, which based on the interpolating algorithm proposed by K. Jain and T. Grandke. This new algorithm obviously improves the accuracy of the FFT, so it can be applied to the precision analysis for electrical harmonic. The simulating result shows that applying deferent windows has the deferent effects to the accuracy, and the Blackman-Harris window has the highest accuracy.
【CateGory Index】: TM711
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