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<p>Hybrid AC/DC microgrids (HMGs) face challenges in global power sharing (GPS), frequency/voltage stability, and communication resilience. This paper proposes a novel consensus-based distributed secondary control (DSC) strategy coordinating interlinking converters (ICs) and distributed generators (DGs) across AC/DC sub-grids. The method eliminates inter-sub-grid communication while achieving: 1) Precise proportional power sharing among all DGs/ICs via modified dynamic consensus algorithms; 2) Restoration of AC frequency/DC voltage to nominal values using distributed secondary layers; 3) Autonomous IC activation triggered <i>only</i> when local DG capacity is exceeded, minimizing losses. Key innovations include: Stabilizing low-pass filters for robust multi-IC coordination, dual-layer consensus (independent sub-grid control plus IC coordination), and plug-and-play operation during DG/IC failures. Stability guarantees are provided through small-signal analysis and Routh–Hurwitz criteria. Validated via a 60-kW HMG prototype and MATLAB/Simulink, the strategy demonstrates: improvement in the responses, reduction in transient deviations, and resilience under communication delays versus prior methods. It maintains seamless operation against overload, and outperforms existing approaches in stability and power-sharing precision. This work enables scalable, communication-efficient HMG operation with enhanced robustness.</p>

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A distributed consensus-based coordinated approach to global power sharing under sparse-communication with accurate voltage/frequency recovery in hybrid microgrids

  • 期刊论文

  • 发表日期：

    2026年5月5日

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  • Mohammad-Ali Seraji,
  • Mohammad-Hosein Kazemi,
  • Aref Doroudi

摘要

Hybrid AC/DC microgrids (HMGs) face challenges in global power sharing (GPS), frequency/voltage stability, and communication resilience. This paper proposes a novel consensus-based distributed secondary control (DSC) strategy coordinating interlinking converters (ICs) and distributed generators (DGs) across AC/DC sub-grids. The method eliminates inter-sub-grid communication while achieving: 1) Precise proportional power sharing among all DGs/ICs via modified dynamic consensus algorithms; 2) Restoration of AC frequency/DC voltage to nominal values using distributed secondary layers; 3) Autonomous IC activation triggered only when local DG capacity is exceeded, minimizing losses. Key innovations include: Stabilizing low-pass filters for robust multi-IC coordination, dual-layer consensus (independent sub-grid control plus IC coordination), and plug-and-play operation during DG/IC failures. Stability guarantees are provided through small-signal analysis and Routh–Hurwitz criteria. Validated via a 60-kW HMG prototype and MATLAB/Simulink, the strategy demonstrates: improvement in the responses, reduction in transient deviations, and resilience under communication delays versus prior methods. It maintains seamless operation against overload, and outperforms existing approaches in stability and power-sharing precision. This work enables scalable, communication-efficient HMG operation with enhanced robustness.