Energy storage system is the key to ensure the normal operation of microgridand the integrated energy storage system is an important mode of energy storage application.In this paper

the integrated energy storage system consisting of battery energy storage and hydrogen energy storage is applied to the photovoltaic microgrid to achievethe multi-energy complement of electric energy

hydrogen energy and solar energy.Firstly

a set of economical and feasible dispatching proposal is designed for the microgrid

which such two parts as present scheduling and real time scheduling the different dispatching principles are used in accordance with different weather condition.Then

the whole life cycle cost of the integrated energy storage system of the microgrid containing lead-carbon battery

Li Feand liquid metal battery is calculated respectively so to determine the best kind of battery.For the integrated energy system studied in this paper

the Li Feis the one with the lowest whole life cycle cost at present

whilethe liquid metal battery may become into a kind of new choice for the system in the future.