Josep M. Guerrero

TL;DR: In this paper, a double-layer hierarchical control strategy was proposed to overcome the control challenge associated with coordination of multiple batteries within one stand-alone microgrid, where the unit-level primary control layer was established by an adaptive voltage-droop method aimed to regulate the common bus voltage and to sustain the states of charge (SOCs) of batteries close to each other during moderate replenishment.

TL;DR: The modeling, control design, and stability analysis of parallel-connected three-phase VSIs are derived and a hierarchical control scheme for the paralleled VSI system control architecture is developed.

TL;DR: A novel control for voltage-source inverters with the capability to flexibly operate in grid-connected and islanded modes based on the droop method, which uses some estimated grid parameters such as the voltage and frequency and the magnitude and angle of the grid impedance.

TL;DR: In this paper, a distributed controller for secondary frequency and voltage control in islanded microgrids is proposed, which uses localized information and nearest-neighbor communication to collectively perform secondary control actions.

TL;DR: A novel variable step-size incremental-resistance MPPT algorithm is introduced, which not only has the merits of INC but also automatically adjusts the step size to track the PV array MPP.