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State-Space Model of Quasi-Z-Source Inverter-PV Systems for Transient Dynamics Studies and Network Stability Assessment

Author

Listed:
  • Lluís Monjo

    (Department of System Engineering and Design, Jaume I University, Av. Vicent sos Baynat s/n, 12071 Castelló de la Plana, Spain)

  • Luis Sainz

    (Department of Electrical Engineering, Barcelona School of Industrial Engineering (ETSEIB-UPC), Polytechnic University of Catalonia, Av. Diagonal 647, 08028 Barcelona, Spain)

  • Juan José Mesas

    (Department of Electrical Engineering, Barcelona East School of Engineering (EEBE-UPC), Polytechnic University of Catalonia, Av. Eduard Maristany 16, 08019 Barcelona, Spain)

  • Joaquín Pedra

    (Department of Electrical Engineering, Barcelona School of Industrial Engineering (ETSEIB-UPC), Polytechnic University of Catalonia, Av. Diagonal 647, 08028 Barcelona, Spain)

Abstract

Photovoltaic (PV) power systems are increasingly being used as renewable power generation sources. Quasi-Z-source inverters (qZSI) are a recent, high-potential technology that can be used to integrate PV power systems into AC networks. Simultaneously, concerns regarding the stability of PV power systems are increasing. Converters reduce the damping of grid-connected converter systems, leading to instability. Several studies have analyzed the stability and dynamics of qZSI, although the characterization of qZSI-PV system dynamics in order to study transient interactions and stability has not yet been properly completed. This paper contributes a small-signal, state-space-averaged model of qZSI-PV systems in order to study these issues. The model is also applied to investigate the stability of PV power systems by analyzing the influence of system parameters. Moreover, solutions to mitigate the instabilities are proposed and the stability is verified using PSCAD time domain simulations.

Suggested Citation

  • Lluís Monjo & Luis Sainz & Juan José Mesas & Joaquín Pedra, 2021. "State-Space Model of Quasi-Z-Source Inverter-PV Systems for Transient Dynamics Studies and Network Stability Assessment," Energies, MDPI, vol. 14(14), pages 1-15, July.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:14:p:4150-:d:591486
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    References listed on IDEAS

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    1. Çelik, Özgür & Teke, Ahmet & Tan, Adnan, 2018. "Overview of micro-inverters as a challenging technology in photovoltaic applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 82(P3), pages 3191-3206.
    2. Serhii Stepenko & Oleksandr Husev & Dmitri Vinnikov & Carlos Roncero-Clemente & Sergio Pires Pimentel & Elena Santasheva, 2019. "Experimental Comparison of Two-Level Full-SiC and Three-Level Si–SiC Quasi-Z-Source Inverters for PV Applications," Energies, MDPI, vol. 12(13), pages 1-17, June.
    3. 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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    Cited by:

    1. Sheng Wang & Huaibao Wang & Hao Ding & Ligen Xun & Sifan Wu, 2021. "A New SVPWM Strategy for Three-Phase Isolated Converter with Current Ripple Reduction," Energies, MDPI, vol. 14(16), pages 1-15, August.
    2. Matija Bubalo & Mateo Bašić & Dinko Vukadinović & Ivan Grgić, 2023. "Hybrid Wind-Solar Power System with a Battery-Assisted Quasi-Z-Source Inverter: Optimal Power Generation by Deploying Minimum Sensors," Energies, MDPI, vol. 16(3), pages 1-24, February.
    3. 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.

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