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A Comprehensive Small-Signal Model Formulation and Analysis for the Quasi-Y Impedance-Source Inverter

Author

Listed:
  • Rafael Santos

    (Institute of Science and Technology of Sorocaba, São Paulo State University (UNESP), Av. Três de Março 511, Sorocaba 18087-180, SP, Brazil)

  • Marcus V. M. Rodrigues

    (Federal Institute of Education, Science, and Technology of São Paulo, Av. Prof. Célso Ferreira da Silva 1333, Avaré 18707-150, SP, Brazil)

  • Luis De Oro Arenas

    (Institute of Science and Technology of Sorocaba, São Paulo State University (UNESP), Av. Três de Março 511, Sorocaba 18087-180, SP, Brazil)

  • Flávio A. S. Gonçalves

    (Institute of Science and Technology of Sorocaba, São Paulo State University (UNESP), Av. Três de Março 511, Sorocaba 18087-180, SP, Brazil)

Abstract

This paper presents a detailed derivation of the small-signal model and components design considerations for the Quasi-Y-Source inverter. The design methodology is based on the converter steady-state operation, considering the impedance network inductor and capacitor voltage and charge balances, respectively. Moreover, the additional design criteria for component selection, considering control constraints and performance compromise, are given by parametric variation analysis based on converter dynamic response. The small-signal model and transfer functions are obtained using a state-space averaged model, including converter non-ideal characteristics given by equivalent-series resistances (ESR), which makes possible the proposition of different control strategies, using both single or multi-loop schemes. To demonstrate the usefulness of the proposed small-signal model, a DSP-based single-loop type-II PI control strategy is used in which the peak DC-link voltage is indirectly controlled through the measurement of the impedance network capacitor voltage. The controller and converter performances are verified with simulation and experimental results and successfully confirm the validity of the proposed dynamic model. Finally, the obtained results are validated with a built small-scale three-phase/three-wire inverter prototype.

Suggested Citation

  • Rafael Santos & Marcus V. M. Rodrigues & Luis De Oro Arenas & Flávio A. S. Gonçalves, 2023. "A Comprehensive Small-Signal Model Formulation and Analysis for the Quasi-Y Impedance-Source Inverter," Energies, MDPI, vol. 16(13), pages 1-24, June.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:13:p:4877-:d:1176981
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    References listed on IDEAS

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    1. Arvind Yadav & Subhash Chandra & Mohit Bajaj & Naveen Kumar Sharma & Emad M. Ahmed & Salah Kamel, 2022. "A Topological Advancement Review of Magnetically Coupled Impedance Source Network Configurations," Sustainability, MDPI, vol. 14(5), pages 1-17, March.
    2. Ivan Grgić & Dinko Vukadinović & Mateo Bašić & Matija Bubalo, 2022. "Photovoltaic System with a Battery-Assisted Quasi-Z-Source Inverter: Improved Control System Design Based on a Novel Small-Signal Model," Energies, MDPI, vol. 15(3), pages 1-29, January.
    3. Zeng, Zheng & Yang, Huan & Zhao, Rongxiang & Cheng, Chong, 2013. "Topologies and control strategies of multi-functional grid-connected inverters for power quality enhancement: A comprehensive review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 24(C), pages 223-270.
    4. Lluís Monjo & Luis Sainz & Juan José Mesas & Joaquín Pedra, 2021. "Quasi-Z-Source Inverter-Based Photovoltaic Power System Modeling for Grid Stability Studies," Energies, MDPI, vol. 14(2), pages 1-16, January.
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