Generalized Energy Storage Configuration Strategy Considering Uncertainty of Load Aggregator Response

Abstract

The future power system will present the typical characteristics of “energy interconnection” and “integration of high-penetration renewable energy”. User-side resources will gradually become important interactive resources to relieve the stress of real-time balance between supply and demand in the system. To fully tap the economic potential of user-side resources, the new energy storage system that consists of loads with a certain adjustment capability on user side is regarded as virtual energy storage (VES). Combining VES with traditional narrow sense energy storage (NSES), the concept of generalized energy storage (GES) is proposed and its characteristics are described based on the response characteristics of NSES and VES. Secondly, considering the uncertainty of VES response, GES response model under the NSES supplementary response strategy is established. On this basis, GES is scheduled by (load aggregator (LA) to participate in the auxiliary service market. The configuration optimization model of NSES with the objective of maximizing the net revenue of LA is established. Finally, under the guidance of the existing electricity auxiliary market policy, the optimization model is simulated. The results show that the NSES configuration strategy increases the revenue of LA while improving the response quality of LA.