Simple interpolation algorithm and its application in power parameter estimation
by Zhongyou Luo; Shuping Song; Ling Zhang; Puzhi Zhao; Haijiang Zhang
International Journal of Computer Applications in Technology (IJCAT), Vol. 67, No. 2/3, 2021

Abstract: The computational complexity of interpolation algorithms is a major concern for real-world power harmonic parameter estimation based on the windowed-interpolation Fast Fourier Transform (FFT) algorithm. A new interpolation algorithm is proposed in this study to estimate the harmonic parameters of power system. This technique is based on the frequency-domain characteristics of the mainlobe of the weighting cosine window, and its calculation formulas are obtained by employing Newton's divided-difference interpolation polynomial. The validity of the proposed algorithm is confirmed through computer simulations via MATLAB and field tests in a photovoltaic system. The results show that the proposed algorithm has the advantage of low computational effort and can be employed for any cosine window.

Online publication date: Thu, 17-Mar-2022

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