Technology and Economic Analysis and Market Mechanism Research of Cogeneration Shared Energy Storage

The construction of a new energy system dominated by renewable energy and energy storage has become the development trend of energy transformation. Aiming at the problems of the poor economy of electrochemical energy storage technology and the mismatch between supply and demand of energy quality, based on the concept of energy cascade utilization and the business model of the sharing economy, this paper explores the new technologies and new business forms of shared energy storage stations for cogeneration and discusses the basic operation principles, technical and economic characteristics and business models of this energy storage mode. The case analysis of a typical cogeneration shared energy storage power station consisting of high-temperature solid heat storage, waste heat boiler, and steam turbine shows that under the current market environment, the internal rate of return is 10.6% and the payback period is 8.2 years when the solid heat storage as energy storage equipment is optimized for economic optimization. Meanwhile, the study reveals the influence rules of capacity leasing ratio, ancillary service price, heating, and energy storage unit investment on the technical and economic performance of the shared energy storage station. Finally, key issues such as equivalent energy storage capacity and multiple income models of cogeneration shared energy storage stations are discussed from technical and market perspectives.