A Hybrid Multiresonances Suppression Method for Nonsynchronous <i>LCL</i>-Type Grid-Connected Inverter Clusters Under Weak Grid

Liu, Jiang; Sun, Xiangdong; Chen, Zechi; Chi, Yongchao; Song, Weizhang; Zhu, Qun; Wheeler, Patrick

doi:10.1109/tpel.2024.3366191

IEEE Trans. Power Electron.

2024

DOI: 10.1109/tpel.2024.3366191

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A Hybrid Multiresonances Suppression Method for Nonsynchronous LCL-Type Grid-Connected Inverter Clusters Under Weak Grid

Jiang Liu,

Xiangdong Sun,

Zechi Chen

et al.

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2024

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Inverter Multi-Machine Grid Integration Resonance Suppression Strategy by Active Damping

Hou,

Jiang,

Cai

2024

Energies

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The current inverter control strategies have limitations in suppressing grid resonance, especially in complex grid environments with high penetration of renewable energy sources. These strate-gies often focus on suppressing resonance at a single frequency point, but their effectiveness is constrained when dealing with multi-band resonance or dynamically changing grid conditions. The study investigates the application of parallel-operated inverters in the grid, particularly their impact on grid stability. A novel active damping strategy is developed to enhance the grid’s dynamic response and suppress grid resonance. The effectiveness of the control strategy is verified through simulation by establishing Norton equivalent circuit models for multiple in-verters. Fast Through simulation, this study comprehensively evaluates the performance and adaptability of the strategy under various conditions. Results demonstrate that implementing the active damping strategy increases the inverter output power from 9.5 kW to 10 kW, an im-provement of 5.26%. System response time is reduced from 50 ms to 30 ms, and post-stabilization fluctuations decrease to 1.5%. These data conclusively prove the effectiveness of the control strategy in enhancing grid stability and reducing resonance effects. The findings underscore the potential of active damping strategies in improving grid performance and in-verter efficiency. However, further research and optimization are necessary to assess the adapt-ability of these strategies under different grid conditions.

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Inverter Multi-Machine Grid Integration Resonance Suppression Strategy by Active Damping

Hou,

Jiang,

Cai

2024

Energies

View full text Add to dashboard Cite

show abstract

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A Hybrid Multiresonances Suppression Method for Nonsynchronous LCL-Type Grid-Connected Inverter Clusters Under Weak Grid

Cited by 1 publication

References 27 publications

Inverter Multi-Machine Grid Integration Resonance Suppression Strategy by Active Damping

Inverter Multi-Machine Grid Integration Resonance Suppression Strategy by Active Damping

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