Research on shared heat storage operation in integrated energy system considering refined power-to-gas model

In the research work of integrated energy system (IES) with a high proportion of renewable energy, the power-to-gas (PtG) is regarded as the key coupling device to participate in the peak shaving with its energy coupling and storage characteristics. In order to carry out a more accurate system operation strategy and economic evaluation, the physical model of PtG is refined considering the waste reaction heat utilization. On this premise, the possibility building an energy hub with electricity /gas/ heat exchange around PtG is considered. The shared heat storage system (SHSS) is introduced, and the energy sharing between energy networks and SHSS is considered. Then, the distributed day-ahead scheduling model of multiple energy networks around PtG is carried out. Considering the security of information interaction, the alternating direction multiplier method (ADMM) is applied to solve the problem. Finally, the centralized optimization and the distributed optimization are carried out and compared in the case study, and the effect of energy sharing between multiple IESs is verified.