A Control Technique Based on Distributed Virtual Inertia for High Penetration of Renewable Energies Under Weak Grid Conditions

Distributed virtual inertia is an approach of providing synthetic in small-scale modern grids dominated by converter-based generators. In this method, the inertial response synchronous machines emulated energy stored dc-link capacitors grid-tied converters. Nonetheless, it results instability interfaced converter weak grids. To overcome problem and get most benefit out acceptable capacitor voltage deviations, a new compensation technique proposed article. The grid-interactive presented framework controlled current control mode, compositing two conventional inner outer loops, distributed controller, novel compensator. detailed small-signal representation whole scheme state-space form derived. Then, revealed that coupling between d- q-axis controllers introduced gain its differential operator gives rise to system grids, which can be eliminated through ancillary time-domain simulation model built confirm efficacy technique. depict active power provided during frequency disturbance 14% rating 20 kW, yields improvement rate change 18.82%.