An energy interconnect microgrid system model with distributed photovoltaic, CAES, demand side response, gas turbine and other equipment is proposed.Then the minimum annual operating cost, including installation cost, energy cost and demand side response cost, is set as the optimization goal.The impact of the number of distributed photovoltaic cells, the configuration of devices, CAES, demand side responses and V2G on device capacity allocation and various costs in the microgrid are analyzed under different scenarios.In particular, the effects of parameters such as the turbine pressure, temperature of the CAES and with or without V2G on the microgrid system are considered.The model proposed can rationalize the equipment capacity configuration and reduce the annual operating cost of energy interconnection microgrid.