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Research on Three-Level Boost-Type DC-DC Photovoltaic Converter Based on Interleaved Control

Published: 31 July 2024 Publication History

Abstract

A front-end three-level boost DC-DC converter and control method are introduced for non-isolated photovoltaic (PV) grid-connected systems in this paper. The boost three-level (Boost-TL) topology is adopted in this PV DC-DC converter. The working principle of the DC-DC Boost-TL converter is analyzed and the mathematical model is built. In order to reduce the ripple of the PV inductor current and the DC output voltage, the interleaved control scheme is proposed by using two switches with driver signal phase shift of 180°. Simultaneously, the balancing voltage of capacitor can be achieved by control the conducting times of the switches. The Boost-TL converter with double closed loop control could reduce the volume of converters, lower of switching device voltage stress, reduce the diode reverse recovery loss and switching loss. Finally, a 23 kW prototype is designed and implemented for the whole PV DC-DC system. The validity of the presented control method is verified by experiment results.

References

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M. Lak, Y. -T. Tsai, B. -R. Chuang, T. -L. Lee and M. H. Moradi, “A hybrid method to eliminate leakage current and balance neutral point voltage for photovoltaic three-level T-type inverter”, IEEE Transactions on Power Electronics, vol. 36, no. 10, pp. 12070-12089, Oct. 2021.
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H. C. Chen and W. J. Lin, “MPPT and voltage balancing control with sensing only inductor current for photovoltaic–fed, three-level, boost-type converters”, IEEE Transactions on Power Electronics., vol. 29, no. 1, pp. 29-35, 2014.
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M. Liu, Z. Yao, X. He, L. Jiang and W. Chen, “A balancing control method with single voltage sensor for five-level buck/boost converter”, 2022 IEEE 17th Conference on Industrial Electronics and Applications (ICIEA), Chengdu, China, 2022, pp. 690-695.
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    PEAI '24: Proceedings of the 2024 International Conference on Power Electronics and Artificial Intelligence
    January 2024
    969 pages
    ISBN:9798400716638
    DOI:10.1145/3674225
    Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than the author(s) must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected].

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    Published: 31 July 2024

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