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Article

A Novel Synchrophasor Estimation Based on Enhanced All-Phase DFT with Iterative Compensation and Its Implementation

1
China Railway Electric Industry Co., Ltd., Baoding 071051, China
2
Department of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350116, China
*
Author to whom correspondence should be addressed.
Academic Editor: Wei-Hsin Chen
Energies 2022, 15(19), 6964; https://doi.org/10.3390/en15196964
Received: 21 July 2022 / Revised: 25 August 2022 / Accepted: 26 August 2022 / Published: 23 September 2022
Synchrophasor estimation was mostly used in transmission systems in the past, and it is difficult to directly apply an existing synchrophasor algorithm to a distribution system with a more complex structure and environment. A synchrophasor estimation algorithm with a high accuracy and fast response speed is required to complete the calculation of the phasor in the face of the complex and changeable power signal of a distribution network. Therefore, an enhanced all-phase discrete Fourier transform (e-apDFT) algorithm is proposed for a distribution system in this paper, and the algorithm is deployed in a phasor measurement unit (PMU) prototype based on digital signal processing (DSP). Aiming to solve the problem of the accuracy of the traditional apDFT being reduced when the response speed is fast due to the influence of a dense spectrum, the existing algorithm is improved through iteratively compensating the spectral interferences to the main bin produced by adjacent bins. The experimental results show that the e-apDFT algorithm still has a fast response speed and that its estimation accuracy is much better than that of the traditional apDFTs in the presence of adjacent harmonic components. The proposed algorithm also complies with the IEEE standards for P-class PMUs. View Full-Text
Keywords: all-phase DFT (apDFT); synchrophasor estimation; phasor measurement unit (PMU); iterative compensation all-phase DFT (apDFT); synchrophasor estimation; phasor measurement unit (PMU); iterative compensation
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MDPI and ACS Style

Li, Z.; Zhang, W.; Zhuang, Z.; Jin, T. A Novel Synchrophasor Estimation Based on Enhanced All-Phase DFT with Iterative Compensation and Its Implementation. Energies 2022, 15, 6964. https://doi.org/10.3390/en15196964

AMA Style

Li Z, Zhang W, Zhuang Z, Jin T. A Novel Synchrophasor Estimation Based on Enhanced All-Phase DFT with Iterative Compensation and Its Implementation. Energies. 2022; 15(19):6964. https://doi.org/10.3390/en15196964

Chicago/Turabian Style

Li, Zengqin, Weifeng Zhang, Zhiyuan Zhuang, and Tao Jin. 2022. "A Novel Synchrophasor Estimation Based on Enhanced All-Phase DFT with Iterative Compensation and Its Implementation" Energies 15, no. 19: 6964. https://doi.org/10.3390/en15196964

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