Resilient Power Control of a Three-Phase Grid-Connected Inverter in the Presence of Uncertain Grid Impedance

Typically, unknown grid impedance in power distribution networks cannot be avoided; therefore, building an effective controller is essential. Furthermore, it is impossible to eliminate the intrinsic parameter uncertainty of the inverter filter. In this study, an AC power grid receives well-regulated power from a DC source using a systematic control method to address these problems.…

Robust Power Control of Three-Phase Grid-Connected Inverter

This paper proposes using Linear Matrix Inequality (LMI) for robust controller design in a three-phase grid-connected inverter (GCI). The controller, applied to a three-phase dc-ac inverter, integrates state feedback and error correction within the dq-rotational frame to eliminate offset errors. An LMI-based optimization minimizes settling time despite uncertainties in the L-filter (expressed as resistance and…