The Virtual Resistor based Active Damping (VR-AD) is widely employed in converters connected to the grid via LCL filters in order to mitigate the inherent resonance of the filters. Nevertheless. in digitally controlled systems. the PWM and the calculating delays modify the system characteristics in terms of frequency and phase. https://www.roneverhart.com/5-15P-ANGLE-PLUG-B-W-HUBBELL-HBL5266CA/