Collaborative Voltage Unbalance Elimination in Grid-Connected AC Microgrids With Grid-Feeding Inverters

The control flexibility of the power inverters that interface distributed generation can be exploited to incorporate quality enhancement features in addition usual management control. This article presents a novel scheme achieves voltage balance at any node an ac microgrid regardless impedance value network. collaborative strategy is devoted set specific sharing balancing currents, thus avoiding adverse effects unbalance compensation by single inverter. uses complex form proportional resonant controller and communication link. stability sensitivity analysis design guidelines for parameters. performance proposal has been tested successfully laboratory setup. Selected experimental results are presented.