A Dispatchable Droop Control Method for Distributed Generators in Islanded AC Microgrids

This article proposes a dispatchable droop control method for multiple distributed generators (DGs), which can be applied in islanded ac microgrids. The proposed method utilizes first-order inertia elements to achieve pseudo hierarchical control so that the DG can share the load automatically on a smaller time scale and obey the dispatch order on a larger time scale. On one hand, the proposed method contains active power regulation and frequency restoration control simultaneously. On the other hand, it has either the reactive power regulation control or the voltage control for different situations. The proposed method is still applicable even when the given power control references are infeasible. The effectiveness of the proposed method is verified by the corresponding simulation based on MATLAB/Simulink.