Simulation study of the grid-connected single-phase impedance-sourced NPC inverter with different control methods

Focus is on three operation strategies for a grid-connected three-level neutral-poi n t-clamped quasi impedance source inverter in a single-ph as e application. Each control scheme wa s implemented in the PS CAD/EMTDC simulation tool a n d underwent different tests, which involved some steps in the reference values and in the perturbations applied to the system. A comparison according to their responses was based on different criteria, such as rise time, settle time, overshoot a n d steady state error, in order to determine which would be more suitable for such application.