Optimal Configuration of Multi-energy Storage for Load Aggregators Considering User Behavior

Abstract

With the electricity market opening gradually in China, end-users transit to prosumers and the complementarity of multiple energy increases continuously, thus cloud energy storage business model may become a new form of user-side energy storage in the future. In this paper, the business model of load aggregator (LA) is applied to the comprehensive optimal configuration of multiple energy storage in the integrated energy system (IES), and the energy storage behavior of users is considered. Firstly, the LA model is summarized, the energy hub (EH) structure is established, and the transformation relationship between input and output is analyzed. Then, a two-stage multi energy storage optimization model is proposed. In the first stage, the electric and thermal energy storage requirements of all users are optimized from the perspective of users. In the second stage, all users' energy storage requirements from the previous stage are integrated, and the configuration of electric and thermal energy storage are comprehensively optimized from the perspective of LA. Finally, this model is applied to three different scenarios and solved by CPLEX. The results of case studies verify that the comprehensive optimal configuration of electric and thermal energy storage in LA mode can utilize energy resources more efficiently and reduce costs. Also, user, LA and power grid can achieve mutual benefit and win-win situation.