Abstract：Harmonics is not only an inherent problem of power system, but also has great influence on the devices in power system. In this article, a harmonic analysis method based on the moved-FFT was offered, which was applied to the intelligent controller of air breaker circuit (ACB) to reduce the computation of the discrete Fourier transform (DFT). It was helpful for the on-line monitoring harmonics in the embedded microcontroller or microprocessor, as well as met the quickness requirement of ACB protection.
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2014, Vol. 15 
