Evaluation of Virtual Admittance-Based Dual-Loop Voltage-Controlled Grid Forming Control

초록

The stability issues of grid-forming converters employing dual-loop virtual admittance-based voltage control in the αβ-reference frame are investigated in this study. The findings reveal that the virtual admittance-based voltage control has a limited achievable bandwidth. Moreover, it becomes unstable when output voltage feedback decoupling control is applied to enhance the voltage control bandwidth. It was found that reducing the voltage feedback decoupling gain by half resolves this issue. The proposed solution is validated through simulations and experiments. © 2025 IEEE.

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