3 papers indexed
Neethu Sajeev, Stephen Arinze Obi, Jae-Jung Jung
Reliable fault recovery of grid-forming (GFM) converters under current-limited conditions is increasingly important as inverter-based resources replace synchronous generation. Existing current-limiting strategies primarily focus on current-angle regulation and synchronization tra…
Stephen Arinze Obi, Ki-Hyun Kim, Jae-Jung Jung
Virtual admittance (VA) is widely used in cascaded voltage-control and current-control (VC-CC) grid-forming inverters (GFMIs) because it shapes the converter terminal behavior while preserving the current-regulation path required for current shaping and limiting. However, the ach…
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…