Quantitative Index Analysis of Energy Storage Demand for Power System with High Proportion of Renewable Energy

With the increase in the proportion of renewable energy in the power system, the safe operation of the power system is facing huge challenges. Flexibility resources have become an important guarantee for the safe operation of the power system, especially the volatility and seasonality of wind and solar power generation, which has a great impact on storage and other flexibility. The demand is increasing rapidly. This paper investigates the concept of power system flexibility and the sources of distribution system flexibility resources, investigates the research progress of flexibility analysis under the current high-proportion renewable energy scenario, and constructs energy storage flexibility demand analysis indicators, respectively. The demand for energy storage flexibility under typical operating supply guarantees, extreme weather supply guarantees, and extremely high ratios of wind and solar is analyzed, providing a reference for the market prospects of user-side energy storage and interactive vehicle-network participation in the power system.