The power market in China is continuing to open, the energy Internet format is gradually being improved, and the energy storage system is going to become a major key technology that will support China’s energy development strategy. All of these developments are taking place against the backdrop of China’s massive investment in the development of new energy. It is one of the effective approaches to handle the problem of grid connection of new energy electrical power generation. This paper investigate and summarizes the typical application scenarios of the system from the three major fields of user side, power grid side, and power generation side, and takes user-side energy storage as an example to build an calculation model, and at the same time verifies it with cases to reflect the practical value. So as to draw the conclusion that the energy storage configuration can effectively regulate the output.