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Observer-Based Sliding Mode Control to Improve Stability of Three-Phase LCL-Filtered Grid-Connected VSIs

Author

Listed:
  • Min Huang

    (Department of Electrical Engineering, Shanghai Maritime University, Shanghai 201306, China)

  • Han Li

    (Department of Electrical Engineering, Shanghai Maritime University, Shanghai 201306, China)

  • Weimin Wu

    (Department of Electrical Engineering, Shanghai Maritime University, Shanghai 201306, China)

  • Frede Blaabjerg

    (Department of Energy Technology, Aalborg University, 9220 Aalborg, Denmark)

Abstract

Grid-connected voltage source inverters (VSIs) with LCL filters have been widely used for distributed generation systems (DGs). Various control methods have been studied to achieve good performance. Among them, sliding mode control has been applied to LCL-filtered grid-connected VSIs for its fast, dynamic response and strong robustness. However, LCL networks can easily cause instability problems under weak grid conditions such as grid impedance variation. At the same time, the stability design of sliding mode control applied for LCL-filtered grid-connected inverters are important, but they lack detailed parameters design in recent papers. In this paper, a design of observer-based sliding mode control to improve the stability of three-phase LCL-filtered grid-connected VSIs was proposed. The theoretical stability analysis was developed to consider the effect of the system discretization and grid impedance variations. Finally, a 3-kW, 110-V, 50-Hz experimental setup has been built to demonstrate the validation of the proposed method.

Suggested Citation

  • Min Huang & Han Li & Weimin Wu & Frede Blaabjerg, 2019. "Observer-Based Sliding Mode Control to Improve Stability of Three-Phase LCL-Filtered Grid-Connected VSIs," Energies, MDPI, vol. 12(8), pages 1-15, April.
  • Handle: RePEc:gam:jeners:v:12:y:2019:i:8:p:1421-:d:222459
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    References listed on IDEAS

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    1. Matthias Schiesser & Sébastien Wasterlain & Mario Marchesoni & Mauro Carpita, 2018. "A Simplified Design Strategy for Multi-Resonant Current Control of a Grid-Connected Voltage Source Inverter with an LCL Filter," Energies, MDPI, vol. 11(3), pages 1-15, March.
    2. Yanxue Yu & Haoyu Li & Zhenwei Li & Zhou Zhao, 2017. "Modeling and Analysis of Resonance in LCL-Type Grid-Connected Inverters under Different Control Schemes," Energies, MDPI, vol. 10(1), pages 1-17, January.
    3. Iman Lorzadeh & Hossein Askarian Abyaneh & Mehdi Savaghebi & Alireza Bakhshai & Josep M. Guerrero, 2016. "Capacitor Current Feedback-Based Active Resonance Damping Strategies for Digitally-Controlled Inductive-Capacitive-Inductive-Filtered Grid-Connected Inverters," Energies, MDPI, vol. 9(8), pages 1-32, August.
    4. Seung-Jin Yoon & Ngoc Bao Lai & Kyeong-Hwa Kim, 2018. "A Systematic Controller Design for a Grid-Connected Inverter with LCL Filter Using a Discrete-Time Integral State Feedback Control and State Observer," Energies, MDPI, vol. 11(2), pages 1-20, February.
    5. Wei Jin & Yongli Li & Guangyu Sun & Lizhi Bu, 2017. "H∞ Repetitive Control Based on Active Damping with Reduced Computation Delay for LCL-Type Grid-Connected Inverters," Energies, MDPI, vol. 10(5), pages 1-19, April.
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    Cited by:

    1. João Faria & João Fermeiro & José Pombo & Maria Calado & Sílvio Mariano, 2020. "Proportional Resonant Current Control and Output-Filter Design Optimization for Grid-Tied Inverters Using Grey Wolf Optimizer," Energies, MDPI, vol. 13(8), pages 1-18, April.

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