Microgrid(MG) is considered to be one of the most effective solutions to integrate renewable distributed generation into power system. However, microgrid has limited capacity to deal with some problems, such as hybrid multi-energy complementarity, increasing renewable energy penetration, and the uncertainties caused by the large-scale incorporation of renewable energy. The development of multi-microgrid(MMG) provides ideas for solving the above problems. MMG has obvious advantages in improving the stability, economy and energy utilization of power grid operation through autonomous management and energy interaction among microgrids. Firstly, this paper focused on the analysis of the main physical topology of the MMG, the corresponding control strategies and energy dispatching strategies in the context of MMG energy management framework. Then, the main modeling methods of MMG system under the influence of uncertainties were summarized. Finally, the future research and development trend of MMG system were prospected, hoping to provide reference for the development of MMG under the background of energy internet.

KEY WORDS : multi-microgrid(MMG); energy management framework; physical topology; uncertainty; energy internet;