A planning method of multi-duration energy storage for new-type power system

The new-type power system with a high proportion of new energy requires a high level of new energy utilization rate and reliable support capabilities for new energy. Configuring diverse energy storage is a crucial measure to enhance the ability of new energy to reliably replace conventional energy. How to configure multi-duration energy storage according to the actual needs of the system is one of the important issues that urgently need to be solved in power system. This article proposes a planning method of multi-duration energy storage considering both the regulation demand of overall power system and the requirements in three specific application scenarios: power-generation side, power-grid side and demand side. Through hourly production simulation and the analysis of the power shortage characteristics for consecutive days, the method can capture the multi-day or seasonal energy transfer situations of the system, thus realizing the planning of long-duration energy storage and combination of multi-duration energy storage. Based on the method proposed in this article, a case study on multi-duration energy storage planning was carried out, and the feasibility of the proposed method is proved.