Decentralized Two-Stage Control for Active Power Real Time Dispatch in Islanded AC Microgrids

Microgrid is a typical small-scale cyber-physical system in which computing, communication, and control technologies are tightly integrated. A two-stage control framework is introduced for active power real time dispatch in islanded ac microgrids. Then a decentralized hybrid method consisting of two control schemes is developed. In the method, an adaptive droop scheme using local physical information is employed in the first stage to provide rapid control for frequency regulation. Based on the peer-to-peer communication in the cyber system, a consensus scheme is implemented in the second stage to realize frequency restoration and economic dispatch simultaneously. Simulation results are presented to demonstrate the effectiveness of the proposed method.