arxiveess.SY2026-06-27
Negative Resistance Caused by Intra-Loop Coupling in Virtual-Admittance-Based Grid-Forming Control
Jaekeun Lee, Minwoo Jeong, Jae-Jung Jung, Xiongfei Wang, Shenghui Cui
This paper addresses the harmonic instability problem of the virtual-admittance (VA)-based grid-forming control. It is revealed that the intra-loop coupling among the VA control, the inner-loop current control, and the voltage feedforward control results in an \(s^2\)-term in the…