A Distributed Economic Dispatch Algorithm for Islanding Microgrid Considering Unreliable Communication Links

To address limitations in scalability and robustness of centralized economic dispatch methods for microgrids, this paper proposes a fully distributed economic dispatch algorithm for microgrids. By the proposed method, the incremental cost is set as consensus variable and estimated power mismatch is obtained and controlled to ensure the power balance through communication among adjacent agents. However the method will be affected by the unreliable communication links, specifically, communication packet loss in communication networks, in power balance and convergence of the algorithm. To overcome the issue, an adjustment mechanism based on similarity is proposed. The simulation results for 6-node microgrid verify the effectiveness of the proposed dispatch algorithm equipped with the adjustment mechanism.