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- W4312924454 abstract "Accurate and fast extraction of the fundamental parameters of fault signals is a critical issue in the overall performance of protective relays. The decaying DC terms (DDTs) in the fault current challenge the discrete Fourier transform (DFT), the reference algorithm for phasor estimation. To meet this challenge, a new modification for half and full-cycle DFT algorithms is proposed in this paper. In the first step, a finite impulse response (FIR) notch filter designed for fundamental frequency is applied to the output of the DFT algorithm. After that, the outcome of the FIR notch filter and its complex conjugate make it possible to extract error terms. Finally, the estimated phasors are emptied from DDTs error. The ability of the proposed method for estimating phasor and tolerating disturbances was assessed using practical simulated signals. The results perform that the proposed method is much more robust, accurate, and faster than previous methods and enhances the efficiency of the DFT algorithm faced by multiple DDTs." @default.
- W4312924454 created "2023-01-05" @default.
- W4312924454 creator A5013226582 @default.
- W4312924454 date "2023-04-01" @default.
- W4312924454 modified "2023-09-30" @default.
- W4312924454 title "A Modified DFT-Based Phasor Estimation Algorithm Using an FIR Notch Filter" @default.
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- W4312924454 doi "https://doi.org/10.1109/tpwrd.2022.3213247" @default.
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