Dynamic Performance of Grid-Forming Interlinking Converters in MVAC-MVDC Hybrid AC/DC Microgrids
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This paper investigates the dynamic performance of grid-forming (GFM) interlinking converters in hybrid AC/DC microgrids. A detailed MATLAB Simulink model of an IEEE-33 bus medium-voltage DC (MVDC) interlinked system is developed, where both converters operate under GFM control. Twelve case studies are presented, covering different DC source-capacitor allocations, grid-connected and standalone operations, and faulted conditions. Simulation results show the impact of DC load variations, power reference steps, and AC disturbances on converter voltage stability, DC link dynamics, and fault resilience. The study highlights the complementary role of multiple GFM converters in ensuring stable operation and coordinated power sharing in hybrid networks.