Reactive Power Sharing Utilizing Low Bandwidth Communication Through Power Lines

To ensure stable operation of a microgrid (MG), active and reactive powers should be shared properly. This is done conventionally with the help of droop control. However, droop control has some limitations specifically in reactive power sharing. In this work, a method for properly sharing reactive power is proposed utilizing low bandwidth communication through power lines. Using these communication signals, virtual impedances of the inverters are adjusted to achieve better reactive power sharing. The viability of the proposed method is verified by simulation in MATLAB/Simulink. Results show that the proposed algorithm is able to accurately achieve reactive power sharing while maintaining the power quality at the load bus.