| Abstract |
This paper embeds a high bandwidth distributed hierarchical control structure for a power electronicbased ac microgrid. Conventionally, hierarchical linear control loops are applied to control the gridfrequency and voltage. However, they suffer slow dynamic response and high sensitivity to parametervariations. In this paper, high bandwidth control approach realized with a finite control set model predictivecontrol (FCS-MPC) scheme to control multiple voltage source converters (VSCs). Furthermore,droop control and virtual impedance are employed to share active and reactive power. At the upper leveldistributed secondary control can be programmed with much higher bandwidth compare to linearizedcascaded control structures. Simulation and experimental results indicate that voltage and frequencyhave been regulated order of magnitude faster than state of the art. |
