Symmetrical components-based robust stabilizing control of a grid-connected inverter under unbalanced voltage sag

This study presents an approach for robust current and power control for a three-phase grid-connected inverter set up with an L-filter that operates under an unbalanced AC grid-voltage source. This control method consists of two paralleled current control for the positive and negative sequences to accomplish one of three selective control targets: a) supplying balanced…

Design of a Robust Unbalanced Current Control of a Three-phase Grid-tied Inverter

A linear matrix inequality (LMI)-based robust control is discussed in this paper for a three-phase grid-tied inverter with L-filtered output under unbalanced grid situation. The controller of this proposed method consists of two parallel current control for positive and negative sequence signals. Uncertainty models are also considered in this paper to provide wider range of…