Multi-type Energy Storage Planning Method for A High Proportion of New Energy Power Systems

The "dual carbon" goal promotes large-scale integration of new energy into the grid. Energy storage plays an important role in the integration of new energy into the grid due to its functions such as peak shaving, frequency regulation, and system support. However, energy storage faced a chaotic situation of small scale, scattered distribution, and lack of unified planning and layout in previous applications. In addition, energy storage could not recover investment due to not participating in scheduling operations. Therefore, it is necessary to gradually plan the scale and layout of energy storage based on the characteristics and functions of energy storage, combined with regional energy storage needs, in order to improve the efficiency of energy storage application, play a regulatory role, and further ensure the safe and stable operation of a high proportion of new energy power systems. Previous studies have mostly focused on a single type of energy storage planning, and there is a lack of comprehensive benefit evaluation. This article proposes a multi-type energy storage planning method for power systems based on basic routes of demand analysis, technology selection, capacity planning, energy storage layout, operation mode, and comprehensive benefit evaluation. In capacity planning, a power system model including new energy output was established, and a multi-type energy storage scale optimization method with the goal of minimizing system energy consumption cost was proposed. Finally, the feasibility of the planning method was verified through an example.