Building a new power system with new energy as the main body is an inevitable choice to promote the clean and low-carbon development of power. Realizing the full consumption of clean energy and meeting the flexible access needs of user side has become an important direction of new power system technology research. Firstly, this paper analyzes the advantages of new energy storage module in improving the power supply reliability of urban power grid, and analyzes the application scenario, technical and economic advantages of the energy storage module AC/DC distribution network. A new AC/DC energy storage system technical scheme is proposed, which can support diversified development and provide flexible and diverse energy orderly access services. Based on the new AC/DC distribution network physical framework of energy storage module, it can realize the flexible access of distributed energy and electric vehicles, meet the needs of AC/DC users such as data center, and provide stable, high-quality and reliable energy supply, and realize the cascade utilization of energy, effectively improve the voltage quality of the park, ensure the full consumption of clean energy, and reduce line loss and power cost. Finally, through the actual case of a new AC/DC energy storage system demonstration project in an area, the advantages and feasibility of this scheme are shown from the aspects of economic and social benefits. It provides reference and experience for realizing the goals of carbon peak and carbon neutralization, ensuring the security of energy supply, promoting the diversified and large-scale development of energy Internet industry, and building a new power system with new energy as the main body.