Distributed energy management for the multi-microgrid system based on ADMM

In this paper, a distributed energy management method for a multi-microgrid (multi-MG) system is developed. Internally, each MG cooperatively coordinates with one another to minimize the aggregated operational cost, while externally, the multi-MG system derives profit via energy arbitrage with the main grid. To this end, the energy management is formulated as a convex optimization, and an alternating direction method of multipliers (ADMM) based distributed algorithm is introduced. Within this algorithm, each MG energy management system (MG-EMS) iteratively exchanges a small amount of information with its neighboring MG-EMSs, and locally optimizes the schedule of the corresponding MG. The proposed method is scalable, center-free, privacy-preserving, and reliable in communication. Numerical results of a 3-MG system demonstrate the effectiveness of the proposed method.