The varying impedance of the power grid affects both the performance of grid-connected inverters and system stability. Simulating this impedance to test inverter control offers more flexibility than physical setups. Traditional Power-Hardware-in-the-loop (PHIL) systems for grid impedance simulation often encounter stability issues and delays, requiring complex adjustments. This paper presents an innovative PHIL system that remains stable without direct communication. Additionally, it introduces a method to nearly eliminate delays and resolve stability issues. High-precision simulations confirm the feasibility and effectiveness of the proposed PHIL system, demonstrating the high accuracy of the emulation in both transient and steady-state conditions.

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