Abstract: The hybrid AC and DC distribution network technology can properly solve the system stability problem with the access of distributed new energy and energy storage system, which is an important international research field of power distribution and utilization. In this paper, the working principle of photovoltaic power generation, wind power generation, energy storage batteries, fuel cells and micro-combustion engines are firstly analyzed and summarized to study the characteristics of hybrid AC and DC power system. On this basis, the corresponding simulation models are established in PSCAD respectively. Finally, the simulation model of hybrid AC and DC power system is built. Through simulation and analysis, the correctness of the model is verified, and the steady-state and the fault characteristics of hybrid AC and DC power system are obtained, which lays a theoretical foundation for the further study of hybrid AC and DC power system.