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A New Three-Phase Hybrid Multilevel Topology with Hybrid Modulation and Control Strategy for Front-End Converter Applications

Author

Listed:
  • Muhammad Ali

    (Centre for Advances in Reliability and Safety, New Territories, Hong Kong)

  • Muhammad Talib Faiz

    (Department of Electronic and Information Engineering, The Hong Kong Polytechnic University (PolyU), Hung Hom, Hong Kong)

  • Muhammad Mansoor Khan

    (Key Laboratory of Control of Power Transmission and Conversion, Ministry of Education, Shanghai Jiaotong University, Shanghai 200240, China)

  • Vincent Ng

    (Centre for Advances in Reliability and Safety, New Territories, Hong Kong)

  • Ka-Hong Loo

    (Centre for Advances in Reliability and Safety, New Territories, Hong Kong
    Department of Electronic and Information Engineering, The Hong Kong Polytechnic University (PolyU), Hung Hom, Hong Kong)

Abstract

This article presents a novel hybrid three-phase multilevel topology with a hybrid modulation and a control strategy for lower-medium voltage front-end converters. The proposed topology consists of a series arrangement of a three-phase full bridge and a packed U-cell. Each phase leg of the circuit comprises eight active switches and two DC link sources, which are connected to a shared DC bus voltage source, thus generating seven levels of output voltage. The active switches of the proposed topology are categorized based on voltage stresses and controlled using a low-frequency space vector PWM and high-frequency alternative phase opposition disposition PWM techniques. To validate the proposed topology and demonstrate the performance and effectiveness of the hybrid modulation and control schemes, simulations in MATLAB/Simulink and experiments on a custom-designed laboratory prototype have been carried out, and the results are discussed in detail. Moreover, a comprehensive comparison has been conducted among the relevant topologies, which reveals several advantages that include a reduced voltage and a current total harmonic distortion (THD) of 11.28% and 1.76%, respectively, minimized switch loss by 10.3 kW, improved efficiency by 0.26%, and decreased the component count with two levels increased in the output voltage.

Suggested Citation

  • Muhammad Ali & Muhammad Talib Faiz & Muhammad Mansoor Khan & Vincent Ng & Ka-Hong Loo, 2024. "A New Three-Phase Hybrid Multilevel Topology with Hybrid Modulation and Control Strategy for Front-End Converter Applications," Mathematics, MDPI, vol. 12(13), pages 1-23, July.
    • Handle: RePEc:gam:jmathe:v:12:y:2024:i:13:p:2116-:d:1429775
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    References listed on IDEAS

    as
    1. Muhammad Ali & Ajmal Farooq & Muhammad Qasim Khan & Muhammad Mansoor Khan & Lucian Mihet-Popa, 2023. "Analysis of Asymmetric Hybrid Modular Multilevel Topology for Medium-Voltage Front-End Converter Applications," Energies, MDPI, vol. 16(4), pages 1-22, February.
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