Distributed optimal dispatching of AC/DC hybrid microgrid based on consensus algorithm

Abstract

With the increasing of DC load and the maturity of power electronics technology, AC/DC hybrid microgrid (HMG), as a new form of microgrid, has been widely concerned. The optimal dispatching method has become a key technology for the rapid development of AC/DC HMG. Based on the consensus algorithm, a distributed optimal dispatching method is proposed in this paper. Firstly, a convex optimization model about AC/DC HMG is established. Secondly, based on the multi-agent system, a distributed control framework is presented. The "Leader-Follow" consensus algorithm is the solution of optimization model, and the incremental cost of distributed generator (DG) and energy storage is selected as the consensus variable. The solution process is divided into two stages to meet AC and DC load respectively for reducing the energy conversion loss. Finally, the results of an example prove the feasibility of the presented distributed optimal dispatching method.