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Model-Based Current Sharing Approach for DCM Interleaved Flyback Micro-Inverter

Author

Listed:
  • Mi Dong

    (School of Information Science and Engineering, Yuelu Road, Central South University, Changsha 410083, China)

  • Xiaoyu Tian

    (School of Information Science and Engineering, Yuelu Road, Central South University, Changsha 410083, China)

  • Li Li

    (School of Information Science and Engineering, Yuelu Road, Central South University, Changsha 410083, China)

  • Dongran Song

    (School of Information Science and Engineering, Yuelu Road, Central South University, Changsha 410083, China)

  • Lina Wang

    (School of Automation Science and Electrical Engineering, Xueyuan Road, Beihang University, Beijing 100191, China)

  • Miao Zhao

    (State Grid Hunan Electric Power Company Limited Research Institute, Changsha 410007, China)

Abstract

Current sharing control is a challenge for a discontinuous conduction mode (DCM) micro-inverter based on interleaved flyback topology. To solve this problem, this study proposes a novel and systemic model-based approach. Firstly, an accurate fourth-order model is presented for the interleaved flyback circuit, which takes the two flybacks’ parameter mismatch and coupling into account. Secondly, based on the presented model, a continuous time sliding mode current controller is proposed to tackle the output imbalance caused by parameter mismatch, coupling and disturbance. The proposed controller is derived from the Lyapunov function without switching conditions. Finally, the effectiveness of the proposed model and control method is validated by simulation tests using MATLAB/SIMULINK. Simulation results show that the proposed approach improves the current sharing for the interleaved flyback micro-inverter when compared to the conventional current sharing approach.

Suggested Citation

  • Mi Dong & Xiaoyu Tian & Li Li & Dongran Song & Lina Wang & Miao Zhao, 2018. "Model-Based Current Sharing Approach for DCM Interleaved Flyback Micro-Inverter," Energies, MDPI, vol. 11(7), pages 1-21, June.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:7:p:1685-:d:154889
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    References listed on IDEAS

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    Cited by:

    1. Carlos Andres Ramos-Paja & Oscar Danilo Montoya & Luis Fernando Grisales-Noreña, 2022. "Adaptive Sliding-Mode Controller for Flyback-Based PV Systems Featuring Constant Switching Frequency," Mathematics, MDPI, vol. 10(8), pages 1-27, April.
    2. Cristian Pesce & Javier Riedemann & Ruben Pena & Werner Jara & Camilo Maury & Rodrigo Villalobos, 2019. "A Modified Step-Up DC-DC Flyback Converter with Active Snubber for Improved Efficiency," Energies, MDPI, vol. 12(11), pages 1-17, May.

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