The passivity-based control (PBC) with Euler–Lagrange (EL) model has been used for LCL-filtered grid-connected converter. However, the impacts of delay and interaction resonances under capacitive grid impedance are rarely considered PBC method. Nonlinear Lyapunov’s stability theory is hard to estimate system accurately design controller parameters considering delay. This paper der...

This paper discusses the design of a repetitive feedback controller for a grid-connected two-level three-phase voltagesource inverter connected between a DC source and the grid through an LCL filter. The controller incorporates a classical two loop feedback of the output current and the capacitor current in addition to a repetitive feedback loop. The results show that the proposed technique imp...