Abstract
Five-level converters have a wide range of applications in the fields of locomotive traction, photovoltaic power generation and reactive power compensation. The problem of poor dynamic performance of a five-level rectifier with coupled inductor using traditional integer-order sliding mode control is investigated. Firstly, the mathematical model of the single-phase rectifier is established on the basis of the analysis of the mechanism of five-level generation. Secondly, a fractional-order sliding mode control (FOSMC) strategy with fast convergence is proposed to address the problems of slow response and large start-up overshoot of the traditional integer-order sliding mode control (IOSMC). The fractional-order calculus is introduced into the sliding mode control to improve the dynamic performance and convergence of the control system by increasing the degrees of freedom of the fractional-order calculus operator. Finally, the stability and convergence of the fractional-order sliding mode control system are demonstrated using Lyapunov theory, and the difference in convergence speed between the integer-order and fractional-order sliding mode systems is analyzed theoretically. Simulation and experimental results show that the proposed fractional-order sliding mode control has the advantages of faster convergence speed, shorter response time and stronger robustness compared with the traditional integer-order sliding mode control.
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Each author discussed the details of the manuscript. X.J designed and wrote the manuscript. X.J and F.Z implemented the proposed technique and provided the experimental results and collated the results of the experiment. Y.Z. and F.Z. reviewed and revised the article. All authors have read and agreed to the published version of the manuscript.
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Zhu, Y., Jia, X. & Zhou, F. Fractional-order sliding mode control of single-phase five-level rectifier. Electr Eng (2024). https://doi.org/10.1007/s00202-024-02284-0
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DOI: https://doi.org/10.1007/s00202-024-02284-0