Energy Management of Multi-microgrids Based on Coordinated Multi-energy Response with Shared Energy Storage

Improving the utilization rate of renewable energy and realizing low carbon operation of multi-microgrids (MMGs) system is one of the important directions of power system reform. The utilization rate will be increased if energy storage devices are used. In the scenario of MMGs interconnection, the construction cost of energy storage of MMGs system can be significantly reduced under the role of shared energy storage. However, how to reduce the construction cost of energy storage while balancing the capacity and investment costs of energy storage devices is a pressing issue in the present. The configuration of a hybrid electric and thermal energy storage device in a MMGs system is proposed in this paper. Each microgrid can lease the hybrid energy storage device to trade energy with it, and manage energy by coordinating the economic layer and energy layer. Through simulation, it is verified that the MMGs energy management method can effectively improve the efficiency of renewable energy utilization in the MMGs system while reducing the dependence of the system on the external grid. Moreover, the operating cost of the system is reduced by 12.7% under the management method this paper proposed.