Distributed Coordination Control of Optimal Economic Operation for Hybrid AC/DC Microgrids

A strategy of distributed economic operation control based on the consensus algorithm is proposed to weaken the influence of line impedance on power distribution， in which the architecture includes two levels of subgrid control and system control. At the subgrid control level, by integrating the secondary adjustment items of cost, frequency, and voltage into economic droop controllers, the control objectives of f ac and V dc restoration and economic power interaction among subgrids were achieved. At the system control level, the difference in incremental costs of ac and dc sections is eliminated by constructing the local control strategy of interlinking converters(ILC) and energy storage systems(ESSs). The two-layer control strategy cooperated with each other to realize the hierarchical-distributed autonomous economic control of the hybrid ac/dc MG. Finally, The effectiveness of the proposed control scheme is verified by Matlab/Simulink.