Abstract
The traditional ip-iq harmonic detection method is widely used in APF, but it sacrifices the response speed and detection accuracy of the APF system due to the limitations of the traditional phase-locked loop and LPF. Therefore, in order to make APF both higher detection accuracy and faster response speed, a harmonic detection method based on dual second-order sliding-window discrete Fourier transform (DS-SDFT) is proposed, which can accurately detect harmonics with DSOGI-PLL and greatly reduce the computational effort by using half-cycle sliding-window iterative discrete Fourier transform, solving the inherent defects of traditional phase-locked loops and LPFs. Meanwhile, in order to compensate the harmonics better, the model predictive control with stronger dynamic response capability is used in the current compensation control. Finally, the APF based on this harmonic detection method and current control strategy is fast in response and high in detection accuracy, which is proved by the simulation and experimental results, and the effectiveness of the detection method is verified.
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Funding
Funding was provided by the National Natural Science Foundation of China (no. 51907083) and Postgraduate Research and Practice Innovation Program of Jiangsu Province (KYCX22_2847).
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ZL wrote the main manuscript text; BL wrote the section of simulation; and YY, PL, and GW wrote the section of experiment jointly.
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Liu, Z., Li, B., Yang, Y. et al. Active power filter based on DS-SDFT harmonic detection method with MPC. Electr Eng (2024). https://doi.org/10.1007/s00202-023-02170-1
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DOI: https://doi.org/10.1007/s00202-023-02170-1