Optimal operation of an integrated energy system by considering the multi energy coupling, AC-DC topology and demand responses

In this paper, an optimal operation model of an Integrated Community Energy System (ICES) based on AC-DC electric topology considerations, power to gas (P2G) and load demand response, is constructed. First of all, the framework of the ICES model based on AC/DC hybrid power supply mode is introduced and the corresponding operation characteristics are analyzed. Then, the mathematical models of energy generations, conversions, storages and consumptions are built based on the analysis of operating principles and characteristics. Moreover, an optimal dispatch model is constructed with the objective of total cost optimization, considering both the various operational constraints of the system and the synergism of the integrated electrical and thermal demand response. Finally, taking a certain area as an example, the operation schemes in different scenarios are given and the GAMS platform is utilized to optimize different operation schemes. The results show that with the introduction of P2G technology and electric-thermal demand responses, the operation economy of the integrated electricity-thermal-natural gas energy system based on an AC-DC electric topology can be improved to a greater extent.