Luenberger Observer-Based Microgrid Control Strategy for Mixed Load Conditions

In this paper, a Luenberger observer-based microgrid control strategy is proposed to enhance the power quality of microgrids, when grid loads are mixed and strongly non-linear. To improve performance under condition, observer designed for three phase grids. On basis observer, components different frequencies sequences voltages currents obtained accurately. The virtual impedance designed, which makes equivalent line meet power-sharing reducing fundamental negative sequence harmonic voltages. active droop equation, meanwhile, proposed, where bus voltage modified. value range discussed in complex frequency domain. does not require any communication lines, so hardware structure simplified. simulations experiments provided verify effectiveness method.