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This paper proposes a coordinated control strategy for islanded microgrids to enable rapid frequency support. It integrates a grid-forming energy storage (ES) with renewable primary control: The ES autonomously injects active power during the disturbances based solely on local measurements, eliminating communication needs. Concurrently, distributed photovoltaic (PV) units, coordinated by the Energy Management System (EMS), provide sustained secondary frequency regulation. The simulation results demonstrate that the proposed strategy significantly mitigates the rate of change of frequency (RoCoF), elevates the frequency nadir (minimum frequency), and enhances transient stability margins. Critically, these improvements are maintained even in the presence of control delays, showcasing the approach's robustness.

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Fast Frequency Support in Islanded Microgrids Using a Grid-Forming Energy Storage Coordinated with Renewable Primary Control

  • 会议论文

  • 发表日期：

    2026年

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  • Xulin Zheng,
  • Haiquan Huang,
  • Jingjing Bai,
  • Yang Zheng,
  • Hao Ding,
  • Lei Shang

摘要

This paper proposes a coordinated control strategy for islanded microgrids to enable rapid frequency support. It integrates a grid-forming energy storage (ES) with renewable primary control: The ES autonomously injects active power during the disturbances based solely on local measurements, eliminating communication needs. Concurrently, distributed photovoltaic (PV) units, coordinated by the Energy Management System (EMS), provide sustained secondary frequency regulation. The simulation results demonstrate that the proposed strategy significantly mitigates the rate of change of frequency (RoCoF), elevates the frequency nadir (minimum frequency), and enhances transient stability margins. Critically, these improvements are maintained even in the presence of control delays, showcasing the approach's robustness.