To improve the operation stability of the microgrid and renewable energy efficiency

a novel multiple composite energy storage system with the compressed air energy storage system

batteries and super capacitors is adopted. The energy management strategy with smooth switching based on the models and operation characteristics is proposed

and the whole lifespan cost calculation of the structure is presented. Then

according to the simulation of the microgrid both in and off the grid connection

the results verify that the composite energy storage system can effectively suppress the fluctuation in different frequency bands during the microgrid running

furthermore

it can dramatically improve the schedulable ability. Finally

compared with various energy storage schemes

it turns out that the novel multiple composite energy storage system has profound preponderance in cost and feasibility. This work is supported by National Natural Science Foundation of China (No. 61320106011

No. 51107069).