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Robust Suppression Strategy for Photovoltaic Grid-Connected Inverter Cluster Resonance Based on Kalman Filter Improved Disturbance Observer

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  • Guofeng He

    (School of Electrical and Control Engineering, Henan University of Urban Construction, Pingdingshan 467036, China
    College of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, China)

  • Cheng Yan

    (Ningbo Deye Technology Co., Ltd., Ningbo 315803, China)

  • Zichun Zhou

    (School of Electrical and Control Engineering, Henan University of Urban Construction, Pingdingshan 467036, China
    College of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, China)

  • Junfang Lin

    (School of Electrical and Control Engineering, Henan University of Urban Construction, Pingdingshan 467036, China
    College of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, China)

  • Guojiao Li

    (School of Electrical and Control Engineering, Henan University of Urban Construction, Pingdingshan 467036, China
    College of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, China)

Abstract

In response to the key engineering problems of photovoltaic grid-connected inverter cluster resonance suppression affected by grid-connected inverter impedance, in this paper, a control strategy based on a disturbance observer is proposed to dynamically compensate for the damping coefficient of the controlled system and improve the robustness of the system. First, an engineering mathematical model of a 200 MW photovoltaic inverter cluster is established, and the mechanism of the active damping of the cluster inverter influenced by the disturbance is analyzed. Secondly, the capacitor current feedback is utilized to constitute the virtual damping, and the inverter output impedance is reshaped to suppress the resonance peak. Then, a Kalman filter is used to improve the traditional disturbance observer to accurately detect disturbance of the system during the dynamic process of the cluster inverter so as to better adapt to changes in grid impedance and dynamically compensate for the virtual damping of the cluster resonant system. Finally, the proposed control strategy is verified with respect to a practical PV power station. The experimental results demonstrate the feasibility of the proposed control method.

Suggested Citation

  • Guofeng He & Cheng Yan & Zichun Zhou & Junfang Lin & Guojiao Li, 2022. "Robust Suppression Strategy for Photovoltaic Grid-Connected Inverter Cluster Resonance Based on Kalman Filter Improved Disturbance Observer," Energies, MDPI, vol. 15(21), pages 1-17, October.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:21:p:7942-:d:953476
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    References listed on IDEAS

    as
    1. Ramy Ali & Terence O’Donnell, 2022. "Analysis and Mitigation of Harmonic Resonances in Multi–Parallel Grid–Connected Inverters: A Review," Energies, MDPI, vol. 15(15), pages 1-30, July.
    2. Anis ur Rehman & Muhammad Ali & Sheeraz Iqbal & Aqib Shafiq & Nasim Ullah & Sattam Al Otaibi, 2022. "Artificial Intelligence-Based Control and Coordination of Multiple PV Inverters for Reactive Power/Voltage Control of Power Distribution Networks," Energies, MDPI, vol. 15(17), pages 1-13, August.
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