Design of energy storage component parameters for three-level grid-connected inverter

In grid-connected inverter, the parameters of grid-side inductors and dc-link capacitors influence the control performances of grid currents and dc-link voltages seriously. This paper deduces the relationship between these parameters and the performance indexes, and proposes a design method for energy storage component parameters of three-level grid-connected inverter. The proposed method is implemented in the development of an actual inverter. Experimental result verifies the validity of the analyses and the feasibility of the proposed design method.