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<p>An efficient heterogeneous inverter system control strategy is proposed in this paper to deal with the control problem under asymmetric faults. In power systems with a high penetration of renewable energy resources, the coexistence of grid-following (GFL) and grid-forming (GFM) inverters is unavoidable. Investigating asymmetrical fault ride-through strategies for the coordination of these two types of inverters is crucial. Asymmetrical fault ride-through requires sufficient capability to suppress harmonic currents and provide reactive power compensation. To achieve this accomplishment, positive and negative sequence (PN)-based control is adopted to mitigate the harmonic current disturbances caused by asymmetric faults. GFL and GFM inverters also share the same phase to achieve synchronization, thereby enabling active and reactive power distribution. Simulations and experimental studies are illustrated to demonstrate the feasibility and effectiveness of the proposed control strategy. The proposed strategy demonstrates significant performance, effectively suppressing current harmonic disturbances. Furthermore, it demonstrates precise power distribution.</p>

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An asymmetric fault ride-through strategy for the heterogeneous grid-forming/grid-following inverter system

  • 期刊论文

  • 发表日期：

    2025年11月24日

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  • Guanjun Li,
  • Xianghui He,
  • Haoyuan Li,
  • Qiang Li,
  • Xiangyu Wang

摘要

An efficient heterogeneous inverter system control strategy is proposed in this paper to deal with the control problem under asymmetric faults. In power systems with a high penetration of renewable energy resources, the coexistence of grid-following (GFL) and grid-forming (GFM) inverters is unavoidable. Investigating asymmetrical fault ride-through strategies for the coordination of these two types of inverters is crucial. Asymmetrical fault ride-through requires sufficient capability to suppress harmonic currents and provide reactive power compensation. To achieve this accomplishment, positive and negative sequence (PN)-based control is adopted to mitigate the harmonic current disturbances caused by asymmetric faults. GFL and GFM inverters also share the same phase to achieve synchronization, thereby enabling active and reactive power distribution. Simulations and experimental studies are illustrated to demonstrate the feasibility and effectiveness of the proposed control strategy. The proposed strategy demonstrates significant performance, effectively suppressing current harmonic disturbances. Furthermore, it demonstrates precise power distribution.