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<p>Unstable power exchange and voltage fluctuations at the PCC frequently compromise the operational stability of DC microgrid clusters. In response to these challenges, a coordinated control framework is developed wherein ICs actively cooperate with distributed sources within sub-microgrids. Distinct from conventional approaches, the proposed strategy enforces a global equilibrium for active power across the entire cluster, whereas reactive power regulation is confined to the local sub-microgrid level. To evaluate the system stability, a comprehensive small-signal model tailored to this specific control architecture is constructed. Simulation results under light-load, reactive heavy-load, and active heavy-load scenarios demonstrate the effectiveness of the proposed method. The findings underscore the capability of ICs to effectively track power flow targets without compromising the voltage stability at the PCC.</p>

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Active-reactive power coordination for DC-interconnected microgrid clusters: a small-signal stability perspective

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年6月18日

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  • Leilei Chen,
  • Yanyan Lin,
  • Hongfei Xiao

摘要

Unstable power exchange and voltage fluctuations at the PCC frequently compromise the operational stability of DC microgrid clusters. In response to these challenges, a coordinated control framework is developed wherein ICs actively cooperate with distributed sources within sub-microgrids. Distinct from conventional approaches, the proposed strategy enforces a global equilibrium for active power across the entire cluster, whereas reactive power regulation is confined to the local sub-microgrid level. To evaluate the system stability, a comprehensive small-signal model tailored to this specific control architecture is constructed. Simulation results under light-load, reactive heavy-load, and active heavy-load scenarios demonstrate the effectiveness of the proposed method. The findings underscore the capability of ICs to effectively track power flow targets without compromising the voltage stability at the PCC.