The model of P2G-based storage system(P2GSS)consisting of electrolyzer

fuel cell and gas storage is established. Wind turbine

photovoltaic

combined cooling

heating and power(CCHP)system

P2GSS and battery are integrated and modeled in the micro energy network(MEN). The total cost of MEN is calculated based on the whole life cycle evaluation(LCE)method. The multi-objective optimization of key equipment capacity of MEN is carried out in order to minimize the whole life cycle cost and annual CO2 emissions simultaneously

along with considering the influence of operation strategy. The impact of P2GSS on MEN in cost

CO2 emission and renewable integration is studied by the comparison of different scenarios.