Research on shared energy storage pricing based on Nash gaming considering storage for frequency modulation and demand response of prosumers

With the continuous development of distributed photovoltaic, the government has accelerated a variety of electricity trading mechanisms as well as energy storage, prosumer participation in the multi-market to promote the consumption of PV. For small aggregations of industrial prosumers, the question of the benefits of interaction with energy storage in complex market environments must be fully considered. This paper presents a comprehensive analysis of the role of energy storage in auxiliary services and the user's demand response market. The concept of Nash equilibrium is employed to develop a model of electric energy interaction and benefit distribution between independent energy storage investment operators and industrial prosumers. The model first derives the internal interaction power through coalition cooperation and then the interaction tariff through an internal game, and uses alternating vector multiplier method to solve it in a distributed way. Compared with the mode of self-built energy storage, an 8.2 %, the three prosumers' cost has decreased by 8.4 %, 7.4 % and 16.0 % respectively, and the energy storage yield was 7.8 %. The calculation example demonstrates that this collaborative model can effectively consume PV, reduce peaks and fill valleys. Such a system has the potential to reduce user costs and, weaken internal competition. Furthermore, it is capable of responding to changes in time-of-use (TOU) tariffs and loads.