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Analysis and Mitigation of Harmonic Resonances in Multi–Parallel Grid–Connected Inverters: A Review

Author

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  • Ramy Ali

    (School of Electrical and Electronic Engineering, University College Dublin, D04 V1W8 Dublin, Ireland; ramy.ali@ucdconnect.ie)

  • Terence O’Donnell

    (School of Electrical and Electronic Engineering, University College Dublin, D04 V1W8 Dublin, Ireland; ramy.ali@ucdconnect.ie)

Abstract

With the move towards decarbonization of the energy system and increased use of renewable generation, the number of power electronics converter interfaced resources connecting to the grid is growing. These power electronics converters have fast dynamics determined by control algorithms, which leads to significant changes in the dynamics and impedance characteristics of the power system. Based on practical experience, concerns have grown about interactions between converters and between converters and the grid which can give rise to instability in a system with multiple grid–connected inverters operating in parallel. This paper reviews the recent work related to the understanding, modeling and mitigation of such interactions. The basic concepts which underpin the interactions are explained and discussed from an impedance stability perspective. The concepts are illustrated by means of an example case of multiple inverters operating in a low voltage distribution system. In recent years, several approaches have been proposed to prevent or mitigate the effects of these interactions. The mitigation approaches proposed in the most recent works are categorized and comprehensively reviewed.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:15:p:5438-:d:873200
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    References listed on IDEAS

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    1. Qingzhu Wan & Hongfan Zhang, 2018. "Research on Resonance Mechanism and Suppression Technology of Photovoltaic Cluster Inverter," Energies, MDPI, vol. 11(4), pages 1-16, April.
    2. Ling Yang & Yandong Chen & Hongliang Wang & An Luo & Kunshan Huai, 2018. "Oscillation Suppression Method by Two Notch Filters for Parallel Inverters under Weak Grid Conditions," Energies, MDPI, vol. 11(12), pages 1-20, December.
    3. Gomes, Camilo C. & Cupertino, Allan F. & Pereira, Heverton A., 2018. "Damping techniques for grid-connected voltage source converters based on LCL filter: An overview," Renewable and Sustainable Energy Reviews, Elsevier, vol. 81(P1), pages 116-135.
    4. 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.
    5. Haijun Tao & Yousong Zhou & Guopeng Zhang & Zheng Zheng, 2019. "Parallel Resonance Mechanism Analysis and Suppression of Inductance-Capacitance-Inductance Grid-Connected Inverters," Energies, MDPI, vol. 12(9), pages 1-15, April.
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    Cited by:

    1. 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.

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